REACTOR AND METHOD FOR CONTINUOUS POLYMERIZATION

The present invention relates to a reactor () and a process for continuous polymerization, where the reactor () has an essentially tubular reactor housing (). The reactor housing () has a drive () which runs along the geometric central axis () in the flow direction () and is configured as a central shaft. A rotatably arranged scraper or wiper () is provided within the reactor housing (); the scraper or wiper () has at least one scraper or wiper blade () to run along an interior side () of the reactor housing (). The rotational movement of the scraper or wiper () results in radial mixing of a stream within the reactor housing () which dominates gravity effects and, by virtue of shaping of the scrapers or wipers, optionally makes plug flow or backflow within the reactor () possible. This allows the reaction conditions in the axial direction of the reactor housing () to be predicted and individually suitable reaction conditions to be set and controlled along the reactor housing, so that, in particular, a desired molecular weight distribution can be set. 11638361636424416. Reactor for the continuous preparation of polymers , in particular synthetic rubbers , comprising at least one essentially tubular reactor housing () having a drive () which is connected to at least one scraper or wiper () which is arranged so as to be rotatable within the reactor housing () , where the scraper or wiper () has at least one scraper or wiper blade () to run along an interior side () of the reactor housing ().212. Reactor according to claim 1 , characterized in that the geometric central axis () is essentially horizontal or essentially vertical.3. Reactor according to or claim 1 , characterized in that it comprises a central shaft running essentially along the geometric central axis.475. Reactor according to any of to claim 1 , characterized in that it further comprises at least one stator ().5. Reactor according to claim 4 , characterized in that the stators are configured such that ...

COMMON SOLVENT PROCESS FOR PRODUCING HIGH MOLECULAR WEIGHT HALOGENATED RUBBER

The invention relates to an energy efficient, environmentally favourable process for the preparation of halogenated rubbers, in particular chloro- and bromobutyl rubber, that uses a common aliphatic medium of specific composition for both solution polymerization and subsequent halogenation of the rubber. More particularly, the invention relates to a process that employs a common aliphatic medium for both solution polymerization and halogenation of rubber with intermediate removal of un-reacted monomers. 1. A process for the preparation of halogenated rubbers comprising at least the steps of: a common aliphatic medium comprising at least 50 wt.-% of one or more aliphatic hydrocarbons having a boiling point in the range of 45° C. to 80° C. at a pressure of 1013 hPa, whereby the common aliphatic medium further comprises a content of cyclic aliphatic hydrocarbons of less than 25 wt.-% and', 'a monomer mixture comprising at least one isoolefin monomer, at least one multiolefin monomer and either no or at least one other co-polymerizable monomer, 'a) providing a reaction medium comprising'}in a mass ratio of monomer mixture to common aliphatic medium of from 40:60 to 99:1,b) polymerizing the monomer mixture within the reaction medium to form a rubber solution comprising a rubber polymer which is at least substantially dissolved in the medium comprising the common aliphatic medium and residual monomers of the monomer mixture;c) separating residual monomers of the monomer mixture from the rubber solution to form a separated rubber solution comprising the rubber and the common aliphatic medium,d) halogenating the rubber in the separated rubber solution using a halogenating agent.2. The process according to claim 1 , wherein the rubber is a butyl rubber.3. The process according to or claim 1 , wherein monomer mixture comprises in the range of from 80.0% to 99.9% by weight of at least one isoolefin monomer and in the range of from 0.1% to 20.0% by weight of at least one ...

PROCESS FOR THE PRODUCTION OF WATER AND SOLVENT-FREE HALOBUTYL RUBBERS

The present invention relates to water and solvent-free halogenated butyl rubber products as a process for the production thereof. The process comprises at least the steps of: a.) treating a fluid containing at least one halogenated butyl rubber and at least one volatile compound in at least one concentrator unit, b.) reheating the concentrated fluid and c.) feeding the reheated concentrated fluid into at least one extruder. 2. The process pursuant to claim 1 , characterized in that the reheated concentrated fluid (L) is free-flowing.3. The process pursuant to claim 1 , characterized in that the halogenated butyl rubber is bromobutyl rubber.4. The process pursuant to to claim 1 , characterized in that the Fluid (F) contains from 3 to 50 wt % of a halogenated butyl rubber and from 60 to 97 wt % volatile compounds claim 1 , whereby the aforementioned components add up to 90 to 100 of the total mass of fluid (F).54. The process pursuant to to claim 1 , characterized in that the degassing vessel () is designed in the shape of a cyclone and has at least a torisperical shaped bottom to facilitate removal of concentrated fluid (H).6. The process pursuant to to claim 1 , characterized in that the extruder unit comprises an extruder selected from the group consisting of single and multiscrew extruders.7. The process pursuant to to claim 1 , characterized in that the extruder unit comprises means to operate separate zones of the extruder independently of each other at different temperatures so that the zones can either be heated claim 1 , unheated or cooled.815. The process pursuant to to claim 1 , characterized in that the vent ports () comprise means to prevent the reheated concentrated fluid (L) or the Product (P) claim 1 , from coming out of the vent ports and that the means are stuffer screws.9. The process pursuant to to claim 1 , characterized in that a stripping agent is added in the extruder unit.10. The process pursuant to to claim 1 , characterized in that the ...

EXTRUDER WITH INTEGRATED DIE PLATE AND METHOD FOR DEGASING POLYMER MIXTURES

The invention is directed to an extruder (), particularly for extruding a synthetic rubber product, which comprises a barrel (), one or several extruder elements (), particularly one or several extruder screws and/or a kneader elements (), arranged inside the barrel () for conveying the product, optionally an inlet port for feeding a stripping agent into the barrel () and an outlet port for removing volatile compounds from the product and, where applicable, the stripping agent. According to the invention a perforated die plate () is fixed to the barrel () in flow direction before the outlet port. Since the die plate () is not fixed to the extruder elements () but to the barrel () a circumferential clearance between the die plate () and the barrel () is prevented so that no extruded material is passing the die plate () radially outside. Parts of the extruded material comprising a low surface area to volume ratio are prevented so that the evaporation of volatile compounds is facilitated. 110. Extruder () comprising at least{'b': '24', 'one barrel (),'}{'b': 12', '14', '24, 'one or several extruder elements (, ) arranged inside the barrel (),'}at least one outlet port for removing volatile compoundswhereby the extruder further comprises at least{'b': 26', '24', '18, 'one perforated die plate () fixed to the barrel () in flow direction () before the outlet port.'}22624. Extruder according to claim 1 , whereby it further comprises at least one inlet port for feeding a stripping agent into the barrel and whereby the at least one perforated die plate () is fixed to the barrel () between the inlet port and the outlet port.32630221214. Extruder according to or claim 1 , wherein the die plate () comprises at least one support opening () each for receiving a shaft () of the corresponding extruder elements ( claim 1 , ).426221214. Extruder according to to claim 1 , wherein the support opening () provides a slide bearing for the shaft () of the extruder elements ( claim 1 , ). ...

ACTIVITY MONITORING AND POLYMERIZATION PROCESS CONTROL

The present invention relates to a method to control a liquid feed stream carried out by measuring at least one spectrum of the liquid feed stream comprising an initiator or catalyst, determining its activity using a predictive model on the basis of said spectrum and adjusting the feed streams and/or the preparation conditions of the feed stream comprising the initiators or catalysts in order to attain or maintain a desired level of total activity. In a further aspect the invention relates to a controlled process for the preparation of polymers in a polymerization reactor by contacting liquid feed streams comprising monomers and initiators or catalysts, whereby the control of the feed streams entering the polymerization reactor and/or the initiator or catalyst preparation is carried out by measuring at least one spectrum of the liquid feed stream comprising an initiator or catalyst, determining its activity using a predictive model on the basis of said spectrum and adjusting the feed streams and/or the preparation conditions of the feed stream comprising the initiators or catalysts in order to attain or maintain a desired level of total activity within the polymerization reactor. More particularly, the invention relates to a method for controlling the activity of aluminium containing initiators in a process for the co-polymerisation of isolefins and multiolefins, in particular isobutylene and isoprene. The present invention further to device and a chemical plant suitable to operate said process. 3. The process according to or the method according to , wherein the active liquid medium comprises at least one polymerisation initiator or polymerisation catalyst and an organic solvent.4. The process or method according to claim 3 , wherein the polymerisation initiator is selected from cationic initiators.5. The process or method according to claim 4 , wherein the cationic initiators are selected from at least one lewis acid or at least one organometal compound such or a ...

REACTOR AND METHOD FOR CONTINUOUS POLYMERIZATION

The invention relates to a reactor and to a method for continuous polymerization, in which said reactor for the continuous production of polymers, particularly synthetic rubbers, contains at least one substantially tubular reactor housing (), wherein said reactor housing () has a drive shaft () that is connected to at least one agitator () arranged such that it can rotate inside the reactor housing (), and the agitator contains at least one, and preferably two, three or four helical mixing elements () which are designed to be preferably close to the wall or to come into contact with the wall. 1. A reactor for the continuous production of polymers , in particular synthetic rubbers , comprising at least one essentially tubular reactor housing , the reactor housing having a drive shaft which is rotatably arranged with at least one inside the reactor housing Stirrer is connected , the stirrer containing at least one , preferably two , three or four helical mixing elements , which are preferably designed close to the wall or in contact with the wall.2. The reactor according to claim 1 , characterized in that the geometric center axis is arranged essentially horizontally or essentially vertically.3. The reactor according to claim 1 , characterized in that it has an internal displacement body which is arranged essentially along the geometric central axis.4. The reactor according to claim 1 , characterized in that the stirrer has at least one helical mixing element designed close to the wall or in contact with the reactor housing claim 1 , and at least one helical mixing element designed close to the wall or in contact with the wall of the internal displacement body.5. The reactor according to claim 3 , characterized in that the internal displacement body is designed in such a way that a temperature control medium can flow through it.6. The reactor according to claim 1 , characterized in that the helical mixing elements are designed such that the distance of the helical ...

METHOD FOR REMOVING VOLATILE COMPONENTS FROM ELASTOMER-CONTAINING MEDIA AND DEGASSING DEVICES THEREFOR

The invention relates to a method for degassing elastomer-containing media, such as elastomer solutions and dispersions in particular, and degassing devices () for carrying out said method. 2. The device in accordance with claim 1 , wherein:{'sub': 'max n', 'claim-text': {'sub': n', 'max n', 'n, '0.420 D Подробнее

REACTOR AND METHOD FOR CONTINUOUS POLYMERIZATION

The present invention relates to a reactor () and a process for continuous polymerization, where the reactor () has an essentially tubular reactor housing (). The reactor housing () has a drive () which runs along the geometric central axis () in the flow direction () and is configured as a central shaft. A rotatably arranged scraper or wiper () is provided within the reactor housing (); the scraper or wiper () has at least one scraper or wiper blade () to run along an interior side () of the reactor housing (). The rotational movement of the scraper or wiper () results in radial mixing of a stream within the reactor housing () which dominates gravity effects and, by virtue of shaping of the scrapers or wipers, optionally makes plug flow or a loop flow or backflow within the reactor () or else via an additional external pumped circulation system () possible. This allows the reaction conditions in the axial direction of the reactor housing () to be predicted and individually suitable reaction conditions to be set and controlled along the reactor housing, so that, in particular, a desired molecular weight distribution can be set. 116. Reactor for the continuous preparation of polymers , in particular synthetic rubbers , comprising at least one essentially tubular reactor housing () having at least{'b': 38', '36', '16', '36', '42', '44, 'one drive () which is connected to at least one scraper or wiper () which is arranged so as to be rotatable within the reactor housing (), where the scraper or wiper () has at least one scraper or wiper blade () to run along an interior side of the reactor housing ()'}{'b': '20', 'at least one inlet ()'}{'b': '24', 'at least one outlet ().'}212. Reactor according to claim 1 , characterized in that it comprises a central shaft running essentially along the geometric central axis ().3242538. Reactor according to or claim 1 , wherein the outlet () is configured such that the outlet orifice () is aligned essentially tangentially to the ...

PROCESS FOR THE PRODUCTION OF ISOOLEFIN POLYMERS WITH IMPROVED INITIATOR SYSTEM PREPARATION

The invention relates to an efficient process for the preparation of isoolefin polymers such as polyisobutene or butyl rubber by polymerization of isobutene and optionally further monomers in the presence of an initiator system prepared by continuously contacting at least one boron or aluminium compound and at least one initiator. 1. A process for the preparation of isoolefin polymers , the process comprising at least the steps of: at least one boron or aluminium compound and', 'at least one initiator, 'a) providing a reaction medium comprising an organic diluent, at least one monomer being an isoolefin and an initiator system prepared by contacting'}andb) polymerizing the at least one monomer within the reaction medium in the presence of the initiator system to form a product medium comprising the isoolefin polymer, the organic diluent and optionally residual monomer(s),whereby the initiator system is formed by continuously contacting at least one boron or aluminium compound and the at least one initiator.2. The process according to claim 1 , wherein the isoolefin are selected from those isoolefins having from 4 to 16 carbon atoms.3. The process according to claim 1 , wherein the isoolefin is isobutene.4. The process according to one of claim 1 , wherein the reaction medium further comprises one or more multiolefins.5. The process according to claim 1 , wherein the reaction medium further comprises isoprene is particularly preferred.6. The process according to claim 3 , wherein the reaction medium comprises isobutene as sole monomer.7. The process according to claim 1 , wherein the organic diluent are selected from hydrochlorocarbon(s) claim 1 , hydrofluorocarbons and alkanes.8. The process according to claim 1 , wherein the boron or aluminium compounds are those represented by formula MX claim 1 , where M is boron or aluminum and X is a halogen or those represented by formula MRX claim 1 , where M is boron or aluminum claim 1 , X is a halogen claim 1 , R is a ...

Process for the production of water and solvent-free halobutyl rubbers

The present invention relates to water and solvent-free halogenated butyl rubber products as well as a process for the production thereof.

PROCESS FOR PRODUCING BROMINATED BUTYL RUBBER

The invention relates to an energy efficient, environmentally favourable process for the preparation of brominated butyl rubbers, that uses a bromination agent and a oxidizing agent in order to enhance the utilization of bromine contained in the bromination agent. In a preferred embodiment a common medium for both solution polymerization and subsequent bromination of the rubber is employed. 1. A process for the preparation of cements comprising aliphatic medium and at least one brominated butyl rubber comprising at least the steps of: A) 5 to 30 wt-%, preferably 8 to 25 wt-%, more preferably 10 to 22 wt.-% of at least one, preferably one butyl rubber', 'B) 0 to 5 wt-%, preferably 0 to 0.9 wt-%, more preferably 0 to 0.6 wt.-% and more preferably 0 to 0.4 wt.-% of water', 'C) and an amount of an aliphatic medium comprising at least 50 wt.-% of one or more aliphatic hydrocarbons having a boiling point in the range of 45.0° C. to 80.0° C. at a pressure of 1013 hPa, selected in such a manner that the sum of A), B) and C) adds up to from 96 to 100 wt-%, preferably to from 98 to 100 wt.-% and more preferably from 99 to 100 wt.-% and even more preferably 100 wt.-% of the total amount of butyl rubber cement, 'a) providing a butyl rubber cement comprising'} a cement comprising aliphatic medium and brominated butyl rubber and', 'an aqueous phase, 'b) brominating the butyl rubber or the butyl rubbers contained in the butyl rubber cement provided in step a) with elemental bromine in the presence of an added aqueous oxidizing agent in order to obtain a heterophasic mixture at least comprising'}and eitherc) adjusting the pH-value of the aqueous phase, preferably within the heterophasic mixture obtained according to step b), to 6 to 13, preferably 8 to 12, more preferably 8 to 11 and even more preferably 9 to 10 using a based1) separating the cement comprising aliphatic medium and brominated butyl rubber from the aqueous phaseord2) separating the heterophasic mixture obtained ...

Process for producing brominated butyl rubber

The invention relates to an energy efficient, environmentally favourable process for the preparation of brominated butyl rubbers, that uses a bromination agent and a oxidizing agent in order to enhance the utilization of bromine contained in the bromination agent. In a preferred embodiment a common medium for both solution polymerization and subsequent bromination of the rubber is employed.

Initiator system for the production of synthetic rubbers

Die vorliegende Erfindung betrifft Initiator-Systeme für kationische Polymerisationen zur Herstellung von synthetischen Kautschuken wie insbesondere Polyisobutylen und ButylKautschuk. The present invention relates to initiator systems for cationic polymerizations for the production of synthetic rubbers, in particular polyisobutylene and butyl rubber.

Reactor and method for continuous polymerization

The present invention relates to a reactor (10) and a method for continuous polymerization, wherein the reactor (10) comprises a substantially tube-shaped reactor housing (16). The reactor housing (16) comprises a drive (38) running along the geometric centerline (12) in the flow direction (22), the drive being implemented as a center shaft. A rotationally disposed scraper or wiper (36) is provided within the reactor housing (16), wherein the scraper or wiper (36) comprises at least one scraper or wiper blade (42) for running along an inner side (44) of the reactor housing (16). Radial mixing of a flow within the reactor housing (16) is achieved by the rotational motion of the scraper or wiper (36), dominating the effects of gravity and selectively allowing a piston, loop, or return flow within the reactor (10) by shaping the scraper or wiper. Said selection allows the reaction conditions in the axial direction of the reactor housing (16) to be predicted and individually suitable reaction conditions to be adjusted and controlled along the reactor housing, so that in particular a desired molecular weight distribution can be set.

Activity monitoring and polymerization process control

The present invention relates to a method to control a liquid feed stream carried out by measuring at least one spectrum of the liquid feed stream comprising an initiator or catalyst, determining its activity using a predictive model on the basis of said spectrum and adjusting the feed streams and/or the preparation conditions of the feed stream comprising the initiators or catalysts in order to attain or maintain a desired level of total activity. In a further aspect the invention relates to a controlled process for the preparation of polymers in a polymerization reactor by contacting liquid feed streams comprising monomers and initiators or catalysts, whereby the control of the feed streams entering the polymerization reactor and/ or the initiator or catalyst preparation is carried out by measuring at least one spectrum of the liquid feed stream comprising an initiator or catalyst, determining its activity using a predictive model on the basis of said spectrum and adjusting the feed streams and/or the preparation conditions of the feed stream comprising the initiators or catalysts in order to attain or maintain a desired level of total activity within the polymerization reactor. More particularly, the invention relates to a method for controlling the activity of aluminium containing initiators in a process for the co-polymerisation of isolefins and multiolefins, in particular isobutylene and isoprene. The present invention further to device and a chemical plant suitable to operate said process.

Tubular reactor and method for continuous polymerisation

A tubular reactor for the continuous production of polymers, especially synthetic rubber, comprises at least one tubular reactor housing (16) with a drive (38) connected to a rotating scraper (36) inside the housing (16), where the scraper (36) has at least one blade (42) for running on the inside of the housing (16). An independent claim is included for a method for the continuous production of polymers by polymerisation of monomers in a tubular reactor (10) as described above, in which a piston flow of starting materials and products is imposed in the horizontal direction and any solids or gels deposited on the inside (44) of the reactor housing are scraped off.

Common solvent process for producing high molecular weight halogenated rubber

The invention relates to an energy efficient, environmentally favorable process for the preparation of halogenated rubbers, in particular chloro- and bromobutyl rubber, that uses a common aliphatic medium of specific composition for both solution polymerization and subsequent halogenation of the rubber. More particularly, the invention relates to a process that employs a common aliphatic medium for both solution polymerization and halogenation of rubber with intermediate removal of un-reacted monomers.

Reactor and method for continuous polymerization

Method for removing volatile components from media containing elastomers and degassing devices for this method

AB STRACT The invention relates to a device and method for treating an degassing media containing elastomers. The device comprising at least one extruder, which has at least: a housing and n housing bores Bn with corresponding bore diameters Dn; n shafts wn, each of which has a rotational axis A,, and is provided with at least one treatment element whose cross-sectional profile, in the peripheral direction, has: m relative maxima Irma); n, where m is a whole number and, wherein the following applies Rmax n < = (Dn/2); at least one feed zone; one or more degassing zones, at least one discharge zone; wherein the extruder has screw elements SE as treatment elements, having clearance ASE between the profiles of the screw elements of the shafts, which can be driven to rotate, each of which is arranged concentrically in adjacent housing bores Bn and Bn-Fi. CA 2908339 2020-03-26

Activity monitoring and polymerization process control

Activity monitoring and polymerization process control

The present invention relates to a method to control a liquid feed stream carried out by measuring at least one spectrum of the liquid feed stream comprising an initiator or catalyst, determining its activity using a predictive model on the basis of said spectrum and adjusting the feed streams and/or the preparation conditions of the feed stream comprising the initiators or catalysts in order to attain or maintain a desired level of total activity. In a further aspect the invention relates to a controlled process for the preparation of polymers in a polymerization reactor by contacting liquid feed streams comprising monomers and initiators or catalysts, whereby the control of the feed streams entering the polymerization reactor and/or the initiator or catalyst preparation is carried out by measuring at least one spectrum of the liquid feed stream comprising an initiator or catalyst, determining its activity using a predictive model on the basis of said spectrum and adjusting the feed streams and/or the preparation conditions of the feed stream comprising the initiators or catalysts in order to attain or maintain a desired level of total activity within the polymerization reactor. More particularly, the invention relates to a method for controlling the activity of aluminum containing initiators in a process for the co-polymerization of isolefins and multiolefins, in particular isobutylene and isoprene. The present invention further to device and a chemical plant suitable to operate said process.

Process for the production of water and solvent-free halobutyl rubbers

The present invention relates to water and solvent -free halogenated butyl rubber products as a process for the production thereof. The process comprises at least the steps of: a.) treating a fluid containing at least one halogenated butyl rubber and at least one volatile compound in at least one concentrator unit, b.) reheating the concentrated fluid and c.) feeding the reheated concentrated fluid into at least one extruder.

Method for removing volatile components from elastomer-containing media and degassing devices therefor

The invention relates to a method for degassing elastomer-containing media, such as elastomer solutions and dispersions in particular, and degassing devices (1) for carrying out said method.

Method for removing volatile components from elastomer-containing media and degassing devices therefor

The invention relates to a method for degassing elastomer-containing media, such as elastomer solutions and dispersions in particular, and degassing devices ( 1 ) for carrying out said method.

Method for separation of volatile components from media containing elastomers and degassing device for the same

Method for removing volatile components from media containing elastomers and degassing devices for this method

The invention relates to a method for degassing elastomer-containing media, such as elastomer solutions and dispersions in particular, and degassing devices (1) for carrying out said method.

Process for producing brominated butyl rubber

The invention relates to an energy efficient, environmentally favourable process for the preparation of brominated butyl rubbers, that uses a bromination agent and a oxidizing agent in order to enhance the utilization of bromine contained in the bromination agent. In a preferred embodiment a common medium for both solution polymerization and subsequent bromination of the rubber is employed.

Process for the production of water and solvent-free halobutyl rubbers

The present invention relates to water and solvent-free halogenated butyl rubber products as well as a process for the production thereof.

Process for producing brominated butyl rubber.

La invención se refiere a un proceso energéticamente eficiente y medioambientalmente favorable para la preparación de cauchos de butilo bromados, que utiliza un agente de bromación y un agente oxidante con el fin de mejorar la utilización del bromo contenido en el agente de bromación. En una realización preferida, se emplea un medio alifático habitual tanto para la polimerización en solución como para la bromación posterior del caucho.

Reactor and process for continuous polymerization

Reactor and method for continuous polymerization

The present invention relates to a reactor ( 10 ) and a process for continuous polymerization, where the reactor ( 10 ) has an essentially tubular reactor housing ( 16 ). The reactor housing ( 16 ) has a drive ( 38 ) which runs along the geometric central axis ( 12 ) in the flow direction ( 22 ) and is configured as a central shaft. A rotatably arranged scraper or wiper ( 36 ) is provided within the reactor housing ( 16 ); the scraper or wiper ( 36 ) has at least one scraper or wiper blade ( 42 ) to run along an interior side ( 44 ) of the reactor housing ( 16 ). The rotational movement of the scraper or wiper ( 36 ) results in radial mixing of a stream within the reactor housing ( 16 ) which dominates gravity effects and, by virtue of shaping of the scrapers or wipers, optionally makes plug flow or a loop flow or backflow within the reactor ( 10 ) or else via an additional external pumped circulation system ( 23 ) possible. This allows the reaction conditions in the axial direction of the reactor housing ( 16 ) to be predicted and individually suitable reaction conditions to be set and controlled along the reactor housing, so that, in particular, a desired molecular weight distribution can be set.

Extruder with integrated die plate and method for degasing polymer mixtures

The invention is directed to an extruder (10), particularly for extruding a synthetic rubber product, which comprises a barrel (24), one or several extruder elements (12, 14), particularly one or several extruder screws and/or a kneader elements (14), arranged inside the barrel (24) for conveying the product, optionally an inlet port for feeding a stripping agent into the barrel (24) and an outlet port for removing volatile compounds from the product and, where applicable, the stripping agent. According to the invention a perforated die plate (26) is fixed to the barrel (24) in flow direction before the outlet port. Since the die plate (26) is not fixed to the extruder elements (12, 14) but to the barrel (24) a circumferential clearance between the die plate (26) and the barrel (24) is prevented so that no extruded material is passing the die plate (26) radially outside. Parts of the extruded material comprising a low surface area to volume ratio are prevented so that the evaporation of volatile compounds is facilitated.

Reactor and method for continuous polymerization

- 31 -Reactor and process for continuous polymerizationAbstractThe present invention relates to a reactor (10) and a process for continuous polymerization, where the reactor (10) has an essentially tubular reactor housing (16). The reactor housing (16) has a drive (38) which runs along the geometric central axis (12) in the flow direction (22) and is configured as a central shaft. A rotatably arranged scraper or wiper (36) is provided within the reactor housing (16); the scraper or wiper (36) has at least one scraper or wiper blade (42) to run along an interior side (44) of the reactor housing (16). The rotational movement of the scraper or wiper (36) results in radial mixing of a stream within the reactor housing (16) which dominates gravity effects and, by virtue of shaping of the scrapers or wipers, optionally makes plug flow or a loop flow or backflow within the reactor (10) or else via an additional external pumped circulation system (23) possible. This allows the reaction conditions in the axial direction of the reactor housing (16) to be predicted and individually suitable reaction conditions to be set and controlled along the reactor housing, so that, in particular, a desired molecular weight distribution can be set.Fig. 7

process for preparing cement and using brominated rubbers or cured brominated rubbers

Process for removing volatile constituents from elastomer-containing media and devolatilisation apparatuses for this purpose

本發明關於一種用於去揮發含彈性體媒介之方法，該媒介諸如、特別是彈性體溶液及分散液，還關於一種用於進行上述方法之去揮發物設備。

Common solvent process for producing high molecular weight brominated rubber

Extruder and method for extruding products

Reactor and process for continuous polymerization

The present invention relates to a reactor (10) and a process for continuous polymerization, where the reactor (10) has an essentially tubular reactor housing (16). The reactor housing (16) has a drive (38) which runs along the geometric central axis (12) in the flow direction (22) and is configured as a central shaft. A rotatably arranged scraper or wiper (36) is provided within the reactor housing (16); the scraper or wiper (36) has at least one scraper or wiper blade (42) to run along an interior side (44) of the reactor housing (16). The rotational movement of the scraper or wiper (36) results in radial mixing of a stream within the reactor housing (16) which dominates gravity effects and, by virtue of shaping of the scrapers or wipers, optionally makes plug flow or a loop flow or backflow within the reactor (10) or else via an additional external pumped circulation system (23) possible. This allows the reaction conditions in the axial direction of the reactor housing (16) to be predicted and individually suitable reaction conditions to be set and controlled along the reactor housing, so that, in particular, a desired molecular weight distribution can be set.

Process for producing brominated butyl rubber

The invention relates to an energy efficient, environmentally favorable process for the preparation of brominated butyl rubbers, that uses a bromination agent and a oxidizing agent in order to enhance the utilization of bromine contained in the bromination agent. In a preferred embodiment a common medium for both solution polymerization and subsequent bromination of the rubber is employed.