COMPOSITION CONTAINING AROMATIC NITRILES FOR THE PRODUCTION OF TRANSPARENT POLYTHIOURETHANE BODIES

The invention relates to a composition for producing transparent polythiourethane bodies, containing or consisting of A) a polyisocyanate component that contains at least one polyisocyanate having an isocyanate group functionality of at least 2 per molecule, B) a thiol component that contains at least one polythiol having a thiol group functionality of at least 2 per molecule, and if appropriate, C) auxiliary and additional agents, the ratio of isocyanate groups to groups that are reactive to isocyanates being between 0.5:1 to 2.0:1, and said composition being characterised in that it also contains D) at least one aromatic nitrile. The invention also relates to a method for producing transparent polythiourethane bodies by reacting such a composition, to the polythiourethane bodies produced in this manner, to the use of aromatic nitriles for producing transparent polythiourethane bodies, and to a mixture of a polyisocyanate and an aromatic nitrile. 115.-. (canceled)16. A composition for producing transparent polythiourethane articles comprisingA) a polyisocyanate component containing at least one polyisocyanate having a functionality of isocyanate groups of at least 2 per molecule,B) a thiol component containing at least one polythiol having a functionality of thiol groups of at least 2 per moleculeand optionallyC) auxiliary and additive agents,wherein the ratio of isocyanate groups to isocyanate-reactive groups is 0.5:1 to 2.0:1,whereinthe composition further containsD) at least one aromatic nitrile.17. The composition as claimed in claim 16 , wherein the composition contains 0.0025 to 10 wt % based on the entire composition of aromatic nitrile.18. The composition as claimed in claim 16 , wherein the nitrile contains at least one further functional group claim 16 , in particular an isocyanate group.19. The composition as claimed in claim 16 , wherein the nitrile is selected from the group consisting of benzonitrile claim 16 , 3-(isocyanatomethyl)benzonitrile claim ...

COMPOSITION FOR TRANSPARENT SHAPED BODIES BASED ON POLYURETHANE

A composition comprising an isocyanate component A) comprising at least one cycloaliphatic or araliphatic diisocyanate, a polyol component B) comprising at least one polyol having an OH number of 80 to 1000 mg KOH/g, an additive component C) comprising at least one internal demoulding agent, and a catalyst component D) comprising at least one inorganic metal complex as thermally latent catalyst, characterized in that the thermally latent catalyst has a quotient of reaction rates between catalysed reaction and uncatalysed reaction at 30° C. of =5.0 and at 60° C. of =1.1. The present invention further provides a process for producing an elastomer and for the use of the composition for production of transparent shaped bodies. 117.-. (canceled)18. A composition comprising anisocyanate component A) comprising at least one cycloaliphatic or araliphatic diisocyanate, a polyol component B) comprising at least one polyol having an OH number of 80 to 1000 mg KOH/g, anadditive component C) comprising at least one internal demolding agent, wherein the demolding agent is at least one mono- and/or dialkyl phosphate having 8 to 12 carbon atoms in the alkyl radical, and acatalyst component D) comprising at least one inorganic metal complex compound as a thermolatent catalyst,wherein the thermolatent catalyst exhibits a quotient of the reaction rates between catalyzed reaction and uncatalyzed reaction of ≦5.0 at 30° C. and of ≧1.1 at 60° C.19. The composition as claimed in claim 18 , wherein the inorganic metal complex compound comprises bismuth claim 18 , titanium claim 18 , zinc claim 18 , zirconium or tin claim 18 , preferably bismuth or tin and particularly preferably tin as the central atom.20. The composition as claimed in claim 18 , wherein the inorganic metal complex compound comprises at least one ligand which comprises at least one ether claim 18 , thioether or amino group and/or is a chelate ligand claim 18 , preferably comprises at least one amino group and/or is a ...

Reaction mixtures of isocyanates and polyols with extended pot life

The invention relates to compounds and methods for extending the pot life of mixtures of isocyanates and isocyanate-reactive compounds when using acidic phosphoric acid ester as a mould release agent.

AMINE CATALYSTS FOR THE MANUFACTURE OF ISOCYANURATE POLYMERS

The present invention relates to the use of tertiary amines as catalysts for the cross-linking of isocyanate groups which are aliphatically and/or cyclo-aliphatically bonded. The catalysts according to the invention have the particular advantage that they are thermally latent. 2. The polymerizable composition as claimed in claim 1 , wherein in formula (II) A is NRand Ris selected from the group consisting of hydrogen claim 1 , methyl claim 1 , ethyl claim 1 , propyl claim 1 , isopropyl claim 1 , butyl claim 1 , and isobutyl.3. The polymerizable composition as claimed in claim 2 , wherein R claim 2 , R claim 2 , and Rare methyl and B is OH.4. The polymerizable composition as claimed in claim 1 , wherein in formula (II) A is oxygen.5. The polymerizable composition as claimed in claim 4 , wherein Rand Rare methyl and B is OH.6. The polymerizable composition as claimed in claim 1 , wherein in formula (I) Ris butylene.7. The use of a compound of formula (I) as defined in any of as a catalyst for crosslinking of at least two aliphatically and/or cycloaliphatically bonded isocyanate groups.8. The use as claimed in claim 7 , wherein the use results in a highly crosslinked polymer.9. The use as claimed in claim 7 , wherein at least one polyisocyanate selected from the group consisting of HDI claim 7 , PDI claim 7 , IPDI claim 7 , H12MDI claim 7 , oligomerized HDI claim 7 , oligomerized PDI claim 7 , oligomerized H12MDI claim 7 , and oligomerized IPDI is employed.10. A kit containinga) at least one polyisocyanate having isocyanate groups selected from the group consisting of aliphatically, cycloaliphatically, araliphatically, and aromatically bonded isocyanate groups and{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'b) at least one compound of formula (I) as defined in .'}11. A process for producing a polymer comprising{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'a) mixing at least one polyisocyanate having isocyanate groups selected from the group consisting of ...

ADDUCTS OF AMINE CATALYSTS FOR PRODUCING ISOCYANURATE POLYMERS

The present invention relates to urethane, thiourethane and urea adducts of tertiary amines and the use thereof as catalysts for the crosslinking of aliphatically, cycloaliphatically, araliphatically or aromatically bonded isocyanate groups with one another. The catalysts according to the invention have the particular advantage that they are thermolatent. 2. The adduct according to claim 1 , wherein Ris the radical of formula (II) and A is NR claim 1 , where Ris selected from the group consisting of hydrogen claim 1 , methyl claim 1 , ethyl claim 1 , propyl claim 1 , isopropyl claim 1 , butyl claim 1 , and isobutyl.3. The adduct according to claim 1 , wherein Ris the radical of formula (II) and A is oxygen.4. The adduct according to claim 1 , wherein Ris butylene.5. The adduct according to claim 1 , wherein the isocyanate is a monomeric or oligomeric isocyanate having aliphatically or cycloaliphatically bonded isocyanate groups.6. The adduct according to claim 1 , comprising a first compound having at least one aliphatically bound isocyanate group and a second compound having at least one aromatically bound isocyanate group claim 1 , wherein the first compound makes up at least 50 wt.-% of all isocyanates used for preparing the adduct and the second compound makes up 5 wt.-% to 50 wt.-% of all isocyanates used for preparing the adduct.7. A method of crosslinking at least two isocyanate groups claim 1 , comprising catalyzing crosslinking of at least two isocyanate groups using the adduct of claim 1 , wherein the at least two isocyanate groups comprise one or more of aliphatically claim 1 , cycloaliphatically claim 1 , araliphatically claim 1 , or aromatically bonded isocyanate groups.8. The method according to claim 7 , wherein the catalyzing results in a highly crosslinked polymer.9. A polymerizable composition comprisinga) at least one polyisocyanate having isocyanate groups comprising one or more of aliphatically, cycloaliphatically, araliphatically, or ...

REACTION MIXTURES OF ISOCYANATES AND POLYOLS WITH EXTENDED POT LIFE

The invention relates to compounds and methods for extending the pot life of mixtures of isocyanates and isocyanate-reactive compounds when using acidic phosphoric acid ester as a mould release agent. 114.-. (canceled)15. A composition containing an isocyanate A and an acidic phosphoric ester B , wherein the mass ratio of A to B is not more than 3.5:1.0.16. The composition as claimed in claim 15 , wherein the isocyanate A is an aliphatic claim 15 , cycloaliphatic claim 15 , araliphatic or aromatic isocyanate or a mixture thereof.17. The use of the composition as claimed in for extending the pot life of a polyurethane composition containing at least one isocyanate A1 and at least one isocyanate-reactive compound C.18. The use as claimed in claim 17 , wherein the isocyanate-reactive compound C is a polyol claim 17 , polyamine or a polythiol.19. A process for producing a composition containing an acidic phosphoric ester B as a demolding agent claim 17 , containing the steps ofi) mixing an isocyanate A and an acidic phosphoric ester B; andii) incubating the resulting mixture.20. The process as claimed in claim 19 , wherein the incubation in process step ii) is carried out for 8 to 24 hours at temperatures between 10° C. and 40° C.21. The process as claimed in claim 19 , wherein the weight ratio of the isocyanate A to the acidic phosphoric ester B is between 2.0:1.0 and 1.0:8.0.22. A process for producing a coating composition having an extended pot life which contains at least one isocyanate A1 and an isocyanate-reactive compound C claim 19 , containing the steps ofa) providing a composition containing an isocyanate A and an acidic phosphoric ester B;b) mixing the composition from process step a) with an isocyanate A1; andc) mixing the product from process step b) with at least one isocyanate-reactive compound C.23. The process as claimed in claim 22 , wherein the isocyanate A is an aliphatic claim 22 , cycloaliphatic claim 22 , araliphatic or aromatic isocyanate or a ...

METHOD FOR PRODUCING AN OPTICAL CAST BODY HAVING A HOLOGRAPHIC OPTICAL ELEMENT, AND OPTICAL CAST BODY

The invention relates to a process for producing an optical casting comprising at least one volume-holographic optical element by means of at least one casting operation, the process comprising the following steps: 115.-. (canceled)16. A process for producing an optical casting comprising at least one volume-holographic optical element by means of at least one casting operation , the process comprising the following steps:providing a casting mould comprising a first mould section having a flat, spherical, aspherical or free-form first surface and a second mould section having a flat, spherical, aspherical or free-form second surface, the first mould section being connectable to the second mould section to form the casting mould,providing at least one holographic optical element,positioning and aligning the at least one holographic optical element with respect to the first mould section or/and with respect to the second mould section,combining the first and second mould sections to form the casting mould,introducing casting material in one or more casting steps, the casting material having a maximum viscosity at 25° C. of 100 000 mPas,curing the casting material,removing the cured casting material comprising the at least one holographic optical element from the casting mould, the at least one holographic optical element being at least partly surrounded by the casting material.17. The process according to claim 16 ,whereinthe first and/or second mould section comprises at least one sleeve for connection of one mould section to the other mould section.18. The process according to claim 17 ,whereinthe at least one holographic optical element is positioned and aligned exclusively or additionally with respect to the at least one sleeve.19. The process according to claim 16 ,whereinthe at least one holographic optical element is positioned and aligned with respect to the first surface of the first mould section and/or with respect to the second surface of the second mould ...

Method for producing an additively manufactured and treated object

The invention relates to a method for producing a treated object, comprising the steps: a) producing an object by means of additive manufacturing, the object being produced by the repeated arrangement, layer by layer, of at least one first material on a substrate spatially selectively in accordance with a cross-section of the object, the method comprising the additional method step: b) at least partially bringing the object, which is still on the substrate or has already been detached from the substrate and which has been produced by additive manufacturing, into contact with a liquid heated to ≥ T or a powder bed of a second material heated to ≥ T for a time ≥ 1 minute in order to obtain the treated object, T standing for a temperature of ≥ 25 °C. The invention further relates to an object produced by a method of this type.

Method for manufacturing xylylene diisocyanates in the gaseous phase

Verfahren zur herstellung eines optischen giesskörpers mit holografisch optischem element und optischer giesskörper

Addukte von aminkatalysatoren zur herstellung von isocyanuratpolymeren

Zusammensetzung für transparente formkörper auf polyurethanbasis