Silane-Functionalized Hydrocarbon Polymer Modifiers for Elastomeric Compositions

An elastomeric composition and method incorporating a hydrocarbon polymer modifier with improved permanence. The composition comprises elastomer, filler and silane-functionalized hydrocarbon polymer modifier (Si-HPM) adapted to couple the Si-HPM to the elastomer, filler or both, wherein the Si-HPM comprises an interpolymer of monomers chosen from piperylenes, cyclic pentadienes, aromatics, limonenes, pinenes, amylenes, and combinations thereof. The method comprises melt processing a mixture to form the elastomeric composition in the shape of an article, wherein the mixture comprises elastomer, Si-HPM, silica, bifunctional organosilane crosslinking agent; and curing the elastomeric composition to form the article. Also disclosed are a silylated hydrocarbon polymer modifier coupled with a bifunctional organosilane crosslinking agent, and a silica-coupled hydrocarbon polymer modifier coupled to the silica via the bifunctional organosilane crosslinking agent.

Thermoplastic Vulcanizate Compositions

In methods for forming thermoplastic vulcanizates, and thermoplastic vulcanizates formed by such methods, a masterbatch comprising one or more additives in a carrier resin comprising propylene- or ethylene-based copolymer is added to the thermoplastic vulcanizate formulation. The resulting thermoplastic vulcanizate may additionally be passed through a 200 mesh or finer screen and thereafter extruded. The thermoplastic vulcanizates may exhibit increased extrusion throughput rates and enhanced surface smoothness. 1. A method comprising:introducing to a chamber each of a thermoplastic resin, an elastomer component, a curing agent, and a carbon black masterbatch; anddynamically vulcanizing at least a portion of the elastomer component so as to form a thermoplastic vulcanizate wherein the elastomer component is at least partially vulcanized and is dispersed in a continuous phase comprising the thermoplastic resin;{'sup': '3', 'wherein the carbon black masterbatch comprises carbon black particles dispersed in a carrier resin comprising a propylene- or ethylene-based copolymer having (i) a density between about 0.850 and about 0.920 g/cmand (ii) a melt index between about 0.05 and about 50 g/10 min as determined in accordance with ASTM D1238, at 190° C. and 2.16 kg weight.'}2. The method of claim 1 , further comprising:passing the thermoplastic vulcanizate through a 200 U.S. Mesh (74 micron) or finer screen, after said dynamic vulcanization of the at least a portion of the elastomer component.3. The method of claim 1 , further comprising melt-mixing the propylene- or ethylene-based copolymer and the carbon black particles claim 1 , and forming a plurality of masterbatch pellets comprising the carbon black particles dispersed in the propylene- or ethylene-based copolymer carrier resin claim 1 , such that the masterbatch pellets are used as the carbon black masterbatch thereafter introduced to the chamber.4. The method of claim 3 , wherein forming the plurality of ...

Weatherable and flame-resistant thermoplastic vulcanizates and methods for making them

A weatherable, flame-resistant thermoplastic vulcanizate composition comprising a thermoplastic matrix; and dispersed within said matrix, an at least partially cured rubber, a flame retardant, and carbon black.

Thermoplastic Vulcanizates and Method of Making the Same

Described herein are thermoplastic vulcanizates comprising thermoplastic resin, an at least partially vulcanized rubber dispersed in the thermoplastic resin, and process oil. The process oil in the thermoplastic vulcanizate may be selected from extension oil, free oil, curative-in-oil, and/or combination thereof. At least a portion of the process oil in the thermoplastic vulcanizate is a low aromatic/sulfur content oil and has an aromatic content of less than 5 wt %, and a sulfur content of less than 0.03 wt %, based on the weight of that portion of the process oil. The thermoplastic vulcanizate exhibits improved gravimetric fogging properties. 1. A thermoplastic vulcanizate comprising the dynamically vulcanized product of thermoplastic resin , rubber , process oil , and vulcanizing agent ,wherein the process oil is selected from extension oil, free oil, curative-in-oil, and combinations thereof, (i) an aromatic content of less than 5 wt %, and', '(ii) a sulfur content of less than 0.03 wt %, and, 'wherein all of the process oil has, based on the weight of the process oil,'}wherein the thermoplastic vulcanizate has a gravimetric fogging, as measured by DIN 17501B, of less than 2 milligrams.2. The thermoplastic vulcanizate of claim 1 , wherein the process oil has an aromatic content of less than 3.5 wt % based on the weight of the process oil.3. The thermoplastic vulcanizate of claim 1 , wherein the process oil has a sulfur content of less than 0.003 wt % based on the weight of the process oil.4. The thermoplastic vulcanizate of claim 1 , wherein the process oil has a percentage of aromatic carbon claim 1 , as determined by ASTM D2140 claim 1 , of less than 2%.5. The thermoplastic vulcanizate of claim 1 , wherein the weight ratio of process oil to rubber is from 0.5:1 to 2:1.6. (canceled)7. (canceled)8. The thermoplastic vulcanizate of claim 1 , wherein the thermoplastic vulcanizate has a gravimetric fogging claim 1 , as measured by DIN 17501B claim 1 , of less than ...

Underwater Pelletizing Method For Low Viscosity Hydrocarbon Resins

An underwater pelletizing method for pelletizing brittle hydrocarbon resins with low melt viscosity. A feed material comprising the hydrocarbon resin is formed into a melt, extruded through a die into a water bath below the Tg of the hydrocarbon resin to form a plurality of extrudates and cut adjacent the die surface to form a slurry of resin pellets. A graft monomer and/or other reactants, such as a hydrosilylation agent, may be introduced into the resin melt to chemically modify the hydrocarbon resin. 1. A method , comprising:forming a feed material comprising a hydrocarbon resin into a resin melt, wherein the feed material comprises a melt viscosity less than 2500 mPa-s (2500 cP), measured at a temperature 60° C. above the softening point, and wherein the hydrocarbon resin has a softening point of 80° C. to 160° C.;introducing at least one reactant into the resin melt to functionalize the resin;extruding the resin melt through a multiple-orifice die into a water bath flowing across a surface of the die, wherein the water bath is supplied at a temperature less than 30° C., to form a plurality of resin extrudates; andcutting the resin extrudates adjacent the die surface to form a slurry of resin pellets.2. The method of claim 1 , wherein the hydrocarbon resin comprises an interpolymer comprising at least one monomer chosen from piperylenes claim 1 , cyclic pentadienes claim 1 , aromatics claim 1 , limonenes claim 1 , pinenes claim 1 , and amylenes.3. The method of claim 1 , further comprising heating the resin melt to a temperature 60° C. or more above the softening point.4. The method of claim 1 , further comprising cooling the resin melt to a temperature at the die before the extrusion that is less than 50° C. above the softening point and at least 10° C. above the softening point.5. The method of claim 1 , further comprising separating the slurry to remove resin pellets from a spent water stream to form dewatered resin pellets and drying the dewatered resin ...

Silane-functionalized hydrocarbon polymer modifiers for elastomeric compositions

An elastomeric composition and method incorporating a hydrocarbon polymer modifier with improved permanence. The composition comprises elastomer, filler and silane-functionalized hydrocarbon polymer modifier (Si-HPM) adapted to couple the Si-HPM to the elastomer, filler or both, wherein the Si-HPM comprises an interpolymer of monomers chosen from piperylenes, cyclic pentadienes, aromatics, limonenes, pinenes, amylenes, and combinations thereof. The method comprises melt processing a mixture to form the elastomeric composition in the shape of an article, wherein the mixture comprises elastomer, Si-HPM, silica, bifunctional organosilane crosslinking agent; and curing the elastomeric composition to form the article. Also disclosed are a silylated hydrocarbon polymer modifier coupled with a bifunctional organosilane crosslinking agent, and a silica-coupled hydrocarbon polymer modifier coupled to the silica via the bifunctional organosilane crosslinking agent.

Thermoplastic Vulcanizates Comprising Propylene-Based Elastomers and Methods for Making the Same

Described herein are thermoplastic vulcanizates comprising propylene-based elastomers and methods for producing the same. The thermoplastic vulcanizates comprise rubber, at least 10 wt % of thermoplastic resin, from 1 to 9 wt % of propylene-based elastomer, oil, and at least 5 wt % of one or more fillers. The thermoplastic vulcanizates are made by a method where the propylene-based elastomer is introduced to the extrusion reactor before the curative is introduced to the extrusion reactor. 1. A method for making a thermoplastic vulcanizate , the method comprising:a. introducing rubber to an extrusion reactor;b. introducing at least 10 wt % of thermoplastic resin, based on the total weight of the thermoplastic vulcanizate, to the extrusion reactor;c. introducing from 1 wt % to 9 wt % of propylene-based elastomer, based on the total weight of the thermoplastic vulcanizate, to the extrusion reactor;d. introducing at least 5 wt % of one or more fillers, based on the total weight of the thermoplastic vulcanizate, to the extrusion reactor;e. introducing a first amount of process oil to the extrusion reactor at a first oil injection location;f. introducing curative to the extrusion reactor a location that is downstream of the first oil injection location and that is downstream of the location at which the propylene-based elastomer is introduced to the extrusion reactor;g. introducing a second amount of process oil to the extrusion reactor at a second oil injection location, where the second oil injection location is downstream of the location where the curative is introduced to the extrusion reactor; andh. dynamically vulcanizing the rubber with the curative in the presence of the thermoplastic resin and the propylene-based elastomer to form the thermoplastic vulcanizate;wherein the thermoplastic vulcanizate comprises a rubber phase that is dispersed and at least partially cross-linked within a continuous thermoplastic component that comprises the thermoplastic resin and ...

Carpet Backing Compositions and Carpet Backing Comprising the Same

The present disclosure relates to a carpet backing composition comprising a first polymer component, a filler, and a compatibilizer that can provide free radial resource for performing bonding functions of the first polymer component and the filler. The composition can exhibit good melt strength/extrudability and low viscosity. The present disclosure also relates to a carpet backing or a carpet that comprises such carpet backing composition. 1. A carpet backing composition comprising:(a) about 10 wt % to about 50 wt % of a first polymer component by weight of the composition, the first polymer component comprising an elastomeric polymer;(b) about 50 wt % to about 90 wt % of a filler by weight of the composition; and(c) about 0.1 wt % to about 5 wt % of a compatibilizer by weight of the composition, the compatibilizer providing free radical source to bond the first polymer component and the filler.2. The composition of claim 1 , wherein the compatibilizer has a melting point of about 50° C. to about 120° C.3. The composition of claim 1 , wherein the compatibilizer has a flash point of about 150° C. to about 300° C.4. The composition of claim 1 , wherein the compatibilizer has a specific gravity of about 0.9 g/cmto about 1 g/cm.5. The composition of claim 1 , wherein the compatibilizer is present in an amount of from about 1 wt % to about 3 wt %.6. The composition of claim 1 , wherein the filler comprises fly ash claim 1 , ground glass claim 1 , calcium carbonate claim 1 , talc claim 1 , clay claim 1 , or combinations thereof.7. The composition of claim 1 , wherein the filler is present in an amount of from about 70 wt % to about 75 wt % by weight of the composition.8. The composition of claim 1 , wherein the first polymer component has a melting temperature of less than about 110° C.9. The composition of claim 1 , wherein the first polymer component is a propylene-based copolymer having about 75 wt % to about 95 wt % propylene-derived units and about 5 wt % to about ...

Silane-Functionalized Hydrocarbon Polymer Modifiers For Elastomeric Compositions

An elastomeric composition and method incorporating a hydrocarbon polymer modifier with improved permanence. The composition comprises elastomer, filler and silane-functionalized hydrocarbon polymer modifier (Si-HPM) made in a pre-reaction adapted to couple the Si-HPM to the elastomer, filler or both, wherein the Si-HPM comprises an interpolymer of monomers chosen from piperylenes, cyclic pentadienes, aromatics, limonenes, pinenes, amylenes, and combinations thereof.

Thermoplastic Vulcanizate Compositions

In methods for forming thermoplastic vulcanizates, and thermoplastic vulcanizates formed by such methods, a masterbatch comprising one or more additives in a carrier resin comprising propylene- or ethylene-based copolymer is added to the thermoplastic vulcanizate formulation. The resulting thermoplastic vulcanizate may additionally be passed through a 200 mesh or finer screen and thereafter extruded. The thermoplastic vulcanizates may exhibit increased extrusion throughput rates and enhanced surface smoothness. 115.-. (canceled)16. A method for preparing a thermoplastic vulcanizate , the method comprising:dynamically vulcanizing at least a portion of an elastomer component in the presence of a thermoplastic resin and a curing agent so as to form a thermoplastic vulcanizate wherein the elastomer component is at least partially vulcanized and is dispersed in a continuous phase comprising the thermoplastic resin; andintroducing a carbon black masterbatch into the thermoplastic vulcanizate, wherein the carbon black masterbatch comprises carbon black particulates dispersed in a carrier resin comprising a propylene-α-olefin copolymer, the propylene-α-olefin copolymer comprising about 50 wt % to about 99 wt % propylene-derived units and about 1 wt % to about 35 wt % comonomer units derived from one of ethylene and a C4-C10 alpha-olefin, and having a heat of fusion of about 75 J/g or less.17. The method of claim 16 , wherein introducing the carbon black masterbatch into the thermoplastic vulcanizate comprises blending the carbon black masterbatch with the thermoplastic vulcanizate while the thermoplastic vulcanizate remains in a molten state following the dynamic vulcanization.18. The method of claim 16 , further comprising pelletizing the thermoplastic vulcanizate so as to form a plurality of thermoplastic vulcanizate pellets prior to introducing the carbon black masterbatch to the thermoplastic vulcanizate.19. The method of claim 18 , wherein introducing the carbon black ...

Weatherable and flame-resistant thermoplastic vulcanizates and methods for making them

A weatherable, flame-resistant thermoplastic vulcanizate composition comprising a thermoplastic matrix; and dispersed within said matrix, an at least partially cured rubber, a flame retardant, and carbon black.

Carpet backing compositions and carpet backing comprising the same

The present disclosure relates to a carpet backing composition comprising a first polymer component, a filler, and a compatibilizer that provides free radical source for performing bonding functions of the first polymer component and the filler. The composition can exhibit good melt strength/extrudability and low viscosity. The present disclosure also relates to a carpet backing or a carpet that comprises such carpet backing composition.

Thermoplastic vulcanizate compositions

In methods for forming thermoplastic vulcanizates, and thermoplastic vulcanizates formed by such methods, a masterbatch comprising one or more additives in a carrier resin comprising propylene- or ethylene-based copolymer is added to the thermoplastic vulcanizate formulation. The resulting thermoplastic vulcanizate may additionally be passed through a 200 mesh or finer screen and thereafter extruded. The thermoplastic vulcanizates may exhibit increased extrusion throughput rates and enhanced surface smoothness.

Thermoplastic vulcanizates and method of making the same

Described herein are thermoplastic vulcanizates comprising thermoplastic resin, an at least partially vulcanized rubber dispersed in the thermoplastic resin, and process oil. The process oil in the thermoplastic vulcanizate may be selected from extension oil, free oil, curative-in-oil, and/or combination thereof. At least a portion of the process oil in the thermoplastic vulcanizate is a low aromatic/sulfur content oil and has an aromatic content of less than 5 wt%, and a sulfur content of less than 0.03 wt%, based on the weight of that portion of the process oil. The thermoplastic vulcanizate exhibits improved gravimetric fogging properties.

Thermoplastic vulcanizates and method of making the same

Described herein are thermoplastic vulcanizates comprising thermoplastic resin, an at least partially vulcanized rubber dispersed in the thermoplastic resin, and process oil. The process oil in the thermoplastic vulcanizate may be selected from extension oil, free oil, curative-in-oil, and/or combination thereof. At least a portion of the process oil in the thermoplastic vulcanizate is a low aromatic/sulfur content oil and has an aromatic content of less than 5 wt %, and a sulfur content of less than 0.03 wt %, based on the weight of that portion of the process oil. The thermoplastic vulcanizate exhibits improved gravimetric fogging properties.

Silane-functionalized hydrocarbon polymer modifiers for elastomeric compositions

An elastomeric composition and method incorporating a hydrocarbon polymer modifier with improved permanence. The composition comprises elastomer, filler and silane-functionalized hydrocarbon polymer modifier (Si-HPM) made in a pre-reaction adapted to couple the Si-HPM to the elastomer, filler or both, wherein the Si-HPM comprises an interpolymer of monomers chosen from piperylenes, cyclic pentadienes, aromatics, limonenes, pinenes, amylenes, and combinations thereof.

Underwater pelletizing method for low viscosity hydrocarbon resins

An underwater pelletizing method for pelletizing brittle hydrocarbon resins with low melt viscosity. A feed material comprising the hydrocarbon resin is formed into a melt, extruded through a die into a water bath below the Tg of the hydrocarbon resin to form a plurality of extrudates and cut adjacent the die surface to form a slurry of resin pellets. A graft monomer and/or other reactants, such as a hydrosilylation agent, may be introduced into the resin melt to chemically modify the hydrocarbon resin.

Weatherable and flame-resistant thermoplastic vulcanizates and methods for making them

A weatherable, flame-resistant thermoplastic vulcanizate composition comprising a thermoplastic matrix; and dispersed within said matrix, an at least partially cured rubber, a flame retardant, and carbon black.

Compositions and methods for making them

Provided are compositions comprising: (i) a dispersed phase of rubber that is at least partially cured; (ii) a continuous thermoplastic phase including at least one thermoplastic polymer; (iii) a first polysiloxane having a number average molecular weight greater than 100 kg/mole; and (iv) a second polysiloxane having a number average molecular weight less than 100 kg/mole, and methods for making such compositions. Also provided are laminates including such compositions, weatherseals made therefrom, and methods for making them.

Thermoplastic vulcanizates comprising propylene-based elastomers and methods for making the same

Described herein are thermoplastic vulcanizates comprising propylene-based elastomers and methods for producing the same. The thermoplastic vulcanizates comprise rubber, at least 10 wt% of thermoplastic resin, from 1 to 9 wt% of propylene-based elastomer, oil, and at least 5 wt% of one or more fillers. The thermoplastic vulcanizates are made by a method where the propylene-based elastomer is introduced to the extrusion reactor before the curative is introduced to the extrusion reactor.

Compositions and methods for making them

Compositions and methods for making them

Provided are compositions comprising: (i) a dispersed phase of rubber that is at least partially cured; (ii) a continuous thermoplastic phase including at least one thermoplastic polymer; (iii) a first polysiloxane having a number average molecular weight greater than 100 kg/mole; and (iv) a second polysiloxane having a number average molecular weight less than 100 kg/mole, and methods for making such compositions. Also provided are laminates including such compositions, weatherseals made therefrom, and methods for making them.

Weatherable and flame-resistant thermoplastic vulcanizates and methods for making them

Weatherable and flame-resistant thermoplastic vulcanizates and methods for making them

A weatherable, flame-resistant thermoplastic vulcanizate composition comprising a thermoplastic matrix; and dispersed within said matrix, an at least partially cured rubber, a flame retardant, and carbon black.

Weatherable and flame-resistant thermoplastic vulcanizates and methods for making them

A weatherable, flame-resistant thermoplastic vulcanizate composition comprising a thermoplastic matrix; and dispersed within said matrix, an at least partially cured rubber, a flame retardant, and carbon black.

Thermoplastic vulcanizate compositions

Thermoplastic vulcanizate compositions

In methods for forming thermoplastic vulcanizates, and thermoplastic vulcanizates formed by such methods, a masterbatch comprising one or more additives in a carrier resin comprising propylene- or ethylene-based copolymer is added to the thermoplastic vulcanizate formulation. The resulting thermoplastic vulcanizate may additionally be passed through a 200 mesh or finer screen and thereafter extruded. The thermoplastic vulcanizates may exhibit increased extrusion throughput rates and enhanced surface smoothness.

Thermoplastic vulcanizate compositions

In methods for forming thermoplastic vulcanizates, and thermoplastic vulcanizates formed by such methods, a masterbatch comprising one or more additives in a carrier resin comprising propylene- or ethylene-based copolymer is added to the thermoplastic vulcanizate formulation. The resulting thermoplastic vulcanizate may additionally be passed through a 200 mesh or finer screen and thereafter extruded. The thermoplastic vulcanizates may exhibit increased extrusion throughput rates and enhanced surface smoothness.

Thermoplastic vulcanizate compositions having improved extrusion performance and methods of formation thereof

In one embodiment is a thermoplastic vulcanizates having improved extrusion properties formed from a composition that includes from 20% to about 80% by weight of an elastomer, from about 80% to about 20% by weight of a thermoplastic, from about 0.05 to about 12 phr of a multifunctional methacrylate monomer peroxide curing coagent; and from about 0.02 to about 6 phr of a phosphorous containing stabilizer. The resultant thermoplastic vulcanizate may be cured with a peroxide curing agent and shows improved die lip build up compared to conventionally prepared thermoplastic vulcanizates. Methods of forming thermoplastic vulcanizates having improved die lip build up are also taught.

Thermoplastic vulcanizate compositions

In methods for forming thermoplastic vulcanizates, and thermoplastic vulcanizates formed by such methods, a masterbatch comprising one or more additives in a carrier resin comprising propylene- or ethylene-based copolymer is added to the thermoplastic vulcanizate formulation. The resulting thermoplastic vulcanizate may additionally be passed through a 200 mesh or finer screen and thereafter extruded. The thermoplastic vulcanizates may exhibit increased extrusion throughput rates and enhanced surface smoothness.

Thermoplastic vulcanizates comprising propylene-based elastomers and methods for making the same

Described herein are thermoplastic vulcanizates comprising propylene-based elastomers and methods for producing the same. The thermoplastic vulcanizates comprise rubber, at least 10 wt % of thermoplastic resin, from 1 to 9 wt % of propylene-based elastomer, oil, and at least 5 wt % of one or more fillers. The thermoplastic vulcanizates are made by a method where the propylene-based elastomer is introduced to the extrusion reactor before the curative is introduced to the extrusion reactor.

A short time frame process for producing extruded closed cell low density propylene polymer foams

A propylene homopolymer or copolymer, or a blend thereof, possessing both sufficient strain hardening, viscoelastic behavior, and melt ductility is heated, melted, and mixed in an extruder with an organic or inorganic physical blowing agent, or a mixture of organic and inorganic physical blowing agents, and with optional compatibilizing agents, nucleating agents, stabilizers and miscellaneous additives. This mixture is pressurized and, subsequently, is cooled to an appropriate temperature at an elevated pressure, and is extruded through a die at rates in excess of 1000 kg/hr to produce an expanded and dimensionally-stable, predominantely closed cell propylene polymer foam with a density of between 10 kg/m3 and 150 kg/m3, and with a thickness in excess of 1.3 cm. The resultant foamed structure is characterized by a Foamability Index of greater than 1.9 and an Ebullition Time of less than 2.0 x 10-4 seconds.

Underwater pelletizing method for low viscosity hydrocarbon resins

An underwater pelletizing method for pelletizing brittle hydrocarbon resins with low melt viscosity. A feed material comprising the hydrocarbon resin is formed into a melt, extruded through a die into a water bath below the Tg of the hydrocarbon resin to form a plurality of extrudates and cut adjacent the die surface to form a slurry of resin pellets. A graft monomer and/or other reactants, such as a hydrosilylation agent, may be introduced into the resin melt to chemically modify the hydrocarbon resin.

Oxygenated hydrocarbon compatibilizing agent for carbon dioxide-blown polyolefinic foams

A method of making a polyolefinic foam composition comprising the steps of: (a) feeding a polyolefinic polymer into an extruder; (b) adding a nucleating agent to the resin feed; (c) optionally adding a permeation modifier to the resin feed; (d) plasticating the mixture in an extruder to form a polymeric melt; (e) incorporating a blowing agent of carbon dioxide and optionally one or more members selected from the group consisting of inorgnaic blowing agents, organic blowing agents, and combinations thereof; (f) incorporating at least one compatibilizing agent into said foamable composition wherein said compatibilizing agent is an oxygenated hydrocarbon that decreases the minimum pressure required to prevent prefoaming while retarding the collapse of foam due to excessive blowing agent migration; (g) uniformly mixing and cooling the foamable composition to a temperature effective for the expansion of the polyolefinic foam; and (h) extruding or ejecting the foamable composition through a die to form a polyolefinic foam.

A short time frame process for producing extruded closed cell low density propylene polymer foams

A propylene homopolymer or copolymer, or a blend thereof, possessing both sufficient strain hardening, viscoelastic behavior, and melt ductility is heated, melted, and mixed in an extruder with an organic or inorganic physical blowing agent, or a mixture of organic and inorganic physical blowing agents, and with optional compatibilizing agents, nucleating agents, stabilizers and miscellaneous additives. This mixture is pressurized and, subsequently, is cooled to an appropriate temperature at an elevated pressure, and is extruded through a die at rates in excess of 1000 kg/hr to produce an expanded and dimensionally-stable, predominantely closed cell propylene polymer foam with a density of between 10 kg/m3 and 150 kg/m3, and with a thickness in excess of 1.3 cm. The resultant foamed structure is characterized by a Foamability Index of greater than 1.9 and an Ebullition Time of less than 2.0 x 10-4 seconds.

A short time frame process for producing extruded closed cell low density propylene polymer foams

A propylene homopolymer or copolymer, or a blend thereof, possessing both sufficient strain hardening, viscoelastic behavior, and melt ductility is heated, melted, and mixed in an extruder with an organic or inorganic physical blowing agent, or a mixture of organic and inorganic physical blowing agents, and with optional compatibilizing agents, nucleating agents, stabilizers and miscellaneous additives. This mixture is pressurized and, subsequently, is cooled to an appropriate temperature at an elevated pressure, and is extruded through a die at rates in excess of 1000 kg/hr to produce an expanded and dimensionally-stable, predominantely closed cell propylene polymer foam with a density of between 10 kg/m3 and 150 kg/m3, and with a thickness in excess of 1.3 cm. The resultant foamed structure is characterized by a Foamability Index of greater than 1.9 and an Ebullition Time of less than 2.0 x 10-4 seconds.

METHOD FOR THE QUICK PRODUCTION OF EXTRUDED CLOSED-CELL FOAMS OF LOW DENSITY FROM POLYPROPYLENE

Kompatibilisierungsmittel für kohlendioxid- geschäumte polyolefinische schäume

Verfahren zur schnellen herstellung von extrudierten geschlossenzelligen schäumen niedriger dichte aus polypropylen

Propylene-based blend compositions

Propylene-based elastomer compositions that include a blend of a majority polymer fraction having a higher Mw and a minority polymer fraction having a lower Mw, methods of making same, and hot melt adhesives including such compositions. The polymer blend compositions can include: a major polymer fraction having a Mw of about 100,000 to about 300,000 and a melt flow rate of about 0.1 g/10 min to about 70.0 g/10 min, according to ASTM D1238; and a minor polymer fraction having a Mw of about 5,000 to about 60,000 and a Brookfield viscosity of about 500 cP to about 50,000 cP, according to ASTM D-3236 (190°C), wherein an amount of the at least one other polyolefin comonomer in the minor polymer fraction is at least 7 wt% less than an amount of the at least one other polyolefin comonomer in the major polymer fraction.

Underwater pelletizing method for low viscosity hydrocarbon resins

An underwater pelletizing method for pelletizing brittle hydrocarbon resins with low melt viscosity. A feed material comprising the hydrocarbon resin is formed into a melt, extruded through a die into a water bath below the Tg of the hydrocarbon resin to form a plurality of extrudates and cut adjacent the die surface to form a slurry of resin pellets. A graft monomer and/or other reactants, such as a hydrosilylation agent, may be introduced into the resin melt to chemically modify the hydrocarbon resin.