Patent ID: 9260628
Filing Date: 2016-02-16
CPC Classification: C08G,C09D

Claim Text:
1. A process for preparing a polyurea elastomer, the process comprising: mixing (a) a polyisocyanate, comprising diphenylmethane 4,4′-diisocyanate, diphenylmethane 2,4′-diisocyanate, or both or with (b) a polyamine, (c) optionally an amine chain extender, comprising a primary or secondary amine group, (d) optionally a polyol and (e) optionally an auxiliary and an additive, thereby forming a reaction mixture and curing the reaction mixture, wherein at least one of components from (a) to (d) comprises dispersed filler particles, obtained by a process comprising polymerizing one or more monomers selected from the group consisting of styrene, acrylonitrile, butadiene, isoprene, 1,4-pentadiene, 1,6-hexadiene, 1,7-octadiene, alpha-methylstyrene, 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, 2,4-dimethylstyrene, ethylstyrene, isopropylstyrene, butylstyrene, phenylstyrene, cyclohexylstyrene, benzylstyrene, cyanostyrene, nitrostyrene, N,N-di-methylaminostyrene, acetoxystyrene, methyl-4-vinyl benzoate, phenoxystyrene, p-vinylphenyl oxide, acrylonitrile, acrylic acid, methacrylic acid, methacrylonitrile, vinyl methyl ketone, vinyl ethyl ketone, vinyl phenyl ketone, vinyl ethyl sulfone, N-methyl-N-vinylacetamide, N-vinylpyrrolidone, vinylimidazole, divinyl sulfoxide, divinyl sulfone, sodium vinylsulfonate, methyl vinylsulfonate, N-vinylpyrrole, vinyl phosphonate, dimethyl fumarate, dimethyl maleate, maleic acid, crotonic acid, fumaric acid, itaconic acid, monomethyl itaconate, allyl alcohol, and vinylpyridine, and wherein said dispersed filler particles are present in at least one of components (a) and (b), or when said component (c), (d), and (c) and (d) is or are present, said dispersed filler particles are present in at least one of components (a), (b), (c), and (d).