Patent ID: 7241837
Filing Date: 2007-07-10
Classification: C08L,Y10T

Abstract:
1. A damper material composition which comprises: a block copolymer (A) comprising a polymer block (a) and polymer block (b) and terminating in said polymer block (b); wherein said polymer block (a) is comprised of an aromatic vinyl compound as a constituent monomer and said polymer block (b) is comprised of isobutylene as a constituent monomer; and wherein the ratio of the storage modulus (G′) value at 0° C. to the corresponding value at 40° C. as found by the measurement of dynamic viscoelasticity at a frequency of 0.5 Hz and a shear strain of 0.05% in the shear mode, namely (G′ wherein the aromatic vinyl compound is at least one selected from the group consisting of styrene, o-, m- or p-methylstyrene, β-methylstyrene, 2,6-dimethylstyrene, 2,4-dimethylstyrene, α-methyl-o-methylstyrene, α-methyl-m-methylstyrene, α-methyl-p-methylstyrene, β-methyl-o-methylstyrene, β-methyl-m-methylstyrene, β-methyl-p-methylstyrene, 2, 4, 6-trimethylstyrene, α-methyl-2, 6-dimethylstyrene, α-methyl-2, 4-dimethylstyrene, β-methyl-2, 6-dimethylstyrene, β-methyl-2, 4-dimethylstyrene, o-, m- or p-chlorostyrene, 2,6-dichlorostyrene, 2,4-dichlorostyrene, α-chloro-o-chlorostyrene, α-chloro-m-chlorostyrene, α-chloro-p-chlorostyrene, β-chloro-o-chlorostyrene, β-chloro-m-chlorostyrene, β-chloro-p-chlorostyrene, 2,4,6-trichlorostyrene, α-chloro-2, 6-dichlorostyrene, α-chloro-2, 4-dichlorostyrene, β-chloro-2,6-dichlorostyrene, β-chloro-2, 4-dichlorostyrene, o-, m- or p-t-butylstyrene, o-, m- or p-methoxystyrene, o-, m- or p-chloromethylstyrene, o-, m- or p-bromomethylstyrene, silyl-substituted styrene derivatives, indene and vinylnaphthalene.