HXNBR-rubber as a cross-linking agent

Abstract

The present invention relates to hydrogenated carboxylated nitrile-butadiene rubber (HXNBR), which contain molecularly dispersed triphenylphosphine, and which is useful as a cross-linking agent for elastomers, plastics and/or adhesive systems. The present invention also relates to products which are obtainable from the HXNBR having molecularly dispersed triphenylphosphine and elastomer, plastics and/or adhesive systems, a composition containing a HXNBR having molecularly dispersed triphenylphosphine and further non-molecularly dispersed activators, a process for the preparation of the composition as well as the use of HXNBR having molecularly dispersed triphenylphosphine, as an elasticizing agent for elastomer, plastics and/or adhesive systems.

What is claimed is:  
     
         1 . a cross-linking agent for elastomer(s), plastic(s) and/or adhesive system(s) comprising a hydrogenated carboxylated nitrile butadiene rubber (HXNBR) wherein the HNBR has a triphenylphosphine molecularly dispersed therein.  
     
     
         2 . A crosslinking agent according to  claim 1 , wherein the HXNBR comprises from 0.1 to 10 wt. % of the molecularly dispersed triphenylphosphine.  
     
     
         3 . A crosslinking agent according to  claim 1 , wherein the HXNBR further comprises a non-molecularly dispersed activator.  
     
     
         4 . A process for crosslinking an elastomer(s), a plastic(s) or an adhesive system(s) comprising the step of adding a crosslinking agent according to  claim 1  to a polyurethane, a polyurea, a polyester, a polyamide, a poly(meth)acrylate, a polyepoxide, a polyepichlorohydrin, a product prepared from a bifunctional or polyfunctional epoxide, thiirane, isocyanate or carbodiimides, bifunctional or polyfunctional amines or alcohols, formaldehyde-phenolic resins, rubbers which are cross-linked by way of radical generators and ionically cross-linkable mixtures.  
     
     
         5 . An elastomer comprising a hydrogenated carboxylated nitrile-butadiene rubber (HXNBR) having a triphenylphosphine molecularly dispersed therein.  
     
     
         6 . A plastic comprising a hydrogenated carboxylated nitrile-butadiene rubber (HXNBR) having a triphenylphosphine molecularly dispersed therein.  
     
     
         7 . An adhesive system comprising a hydrogenated carboxylated nitrile-butadiene rubber (HXNBR) having a triphenylphosphine molecularly dispersed therein.  
     
     
         8 . A composition comprising 
 a) a hydrogenated carboxylated nitrile-butadiene rubber (HXNBR), in which a triphenylphosphine is molecularly dispersed, and    b) a non-molecularly dispersed activator.    
     
     
         9 . A composition according to  claim 8 , comprising from 10 to 99.9 wt. % of the component a) and from 0.1 to 90 wt. % of the component b).  
     
     
         10 . A composition according to  claim 8 , wherein the activator is selected from the group consisting of ethanolamine, primary or secondary aliphatic or aromatic amines, organic phosphorus compounds, acid catalysts and mixtures thereof.  
     
     
         11 . A composition according to  claim 9 , comprising from 0.1 to 10 wt. % of molecularly dispersed triphenylphosphine.  
     
     
         12 . A composition according to  claim 8 , comprising from 0 to 90 wt. % of further additives selected from the group consisting of organic solvents, stabilizers, emulsifiers, water, plasticizers, processing aids and fillers.  
     
     
         13 . Process for the preparation of the composition according to  claim 8 , comprising 
 a) providing an HXNBR rubber which comprises molecularly dispersed triphenylphosphine and which prepared by the hydrogenation of an XNBR rubber prepared by means of emulsion polymerization, and    b) mixing the HXNBR rubber with further activators.