Abstract:
Graft polymers having high impact resistance are produced by polymerizing vinyl monomers in an aqueous emulsion of an olefinic rubber having a low degree of unsaturation, wherein the emulsion also contains an aromatic, aliphatic or cycloaliphatic hydrocarbon liquid stabilizer.
Abstract:
Impact resistant compositions comprising crude graft polymers of vinyl chloride on unsaturated olefinic elastomers, said elastomers being copolymers of ethylene, an Alpha -olefin and a diene or a polyene, are prepared by graft polymerizing vinyl chloride onto an olefinic elastomer. The graft polymerization is discontinued before 70% of the vinyl chloride has been polymerized.
Abstract:
An improved process for bonding natural or synthetic fibers to elastomeric copolymers of ethylene and higher alpha-olefins or to terpolymers of ethylene, higher alpha-olefins and cyclic or acyclic dienes having non-conjugated double bonds is disclosed. The process comprises coating the fibers with an aqueous dispersion of phenol-aldehyde resin and a latex of an elastomeric ethylene copolymer or terpolymer as defined above which is grafted with an acid, water-soluble vinyl or vinylidene monomer, the aqueous dispersion having been allowed to mature for from 10 to 80 hours after preparation thereof. After the fibers are coated with the aqueous dispersion and dried, an elastomeric ethylene copolymer or terpolymer as defined above and containing a vulcanizing agent is contacted therewith and vulcanized thereon.