Vibration damper composition
First Claim
Patent Images
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′
0°
C./G′
40°
C.), is not greater than 10, and the loss tangent (tan δ
) value as found by said measurement is not smaller than 0.4 at 0°
C. to 40°
C.; and
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.
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Abstract
The present invention has for its object to provide a damping material which, despite a high damping capacity at and around room temperature, has a small temperature dependence of rigidity at and around room temperature and a damping material having hot-melt processability and a good balance between damping capacity and temperature dependence of rigidity at and around room temperature.
This invention provides a damper material composition
- 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 in the shear mode, namely (G′0° C./G′40° C.), is not greater than 15
- and the loss tangent (tan δ) value as found by said measurement is not smaller than 0.4 at 0° C. to 40° C.
15 Citations
19 Claims
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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′
0°
C./G′
40°
C.), is not greater than 10, and the loss tangent (tan δ
) value as found by said measurement is not smaller than 0.4 at 0°
C. to 40°
C.; andwherein 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. - View Dependent Claims (2, 3, 4, 5, 7, 8, 14, 15, 16, 17, 18)
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6. A damper material composition which comprises:
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a block copolymer (A) comprising a polymer block (a) and a polymer block (b) and terminating in said polymer block (b), and a thermoplastic resin (C); 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; 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′
0°
C./G′
40°
C.), is not greater than 10, and the loss tangent (tan δ
) value as found by said measurement is not smaller than 0.4 at 0°
C. to 40°
C.; andwherein the thermoplastic resin (C) is at least one selected from the group consisting of ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-hexene copolymer, ethylene-octene copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, high-density polyethylene, low-density polyethylene, linear low-density polyethylene and isobutylene-isoprene copolymer (butyl rubber).
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9. A damper material composition comprising:
-
a diblock copolymer (A′
) comprising a polymer block (a′
) and a polymer block (b);said polymer block (a′
) being comprised of an aromatic vinyl compound as a constituent monomer and having a number average molecular weight of not more than 10,000; and
said polymer block (b) being comprised of isobutylene as a constituent monomer;wherein the ratio of the storage modulus (G′
) value at 10°
C. to the corresponding value at 30°
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′
10°
C./G′
30°
C.), is not greater than 2, and the loss tangent (tan δ
) value as found by said measurement is not smaller than 0.4 at 10°
C. to 30°
C.; andwherein 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. - View Dependent Claims (10, 11, 13, 19)
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12. A damper material composition comprising:
-
a diblock copolymer (A′
) comprising a polymer block (a′
) and a polymer block (b), and a thermoplastic resin (C);said polymer block (a′
) being comprised of an aromatic vinyl compound as a constituent monomer and having a number average molecular weight of not more than 10,000; and
said polymer block (b) being comprised of isobutylene as a constituent monomer;wherein in said damper material the ratio of the storage modulus (G′
) value at 10°
C. to the corresponding value at 30°
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′
10 °
C./G′
30 °
C.), is not greater than 2, and the loss tangent (tan δ
) value as found by said measurement is not smaller than 0.4 at 10°
C. to 30°
C.; andwherein the thermoplastic resin (C) is at least one selected from the group consisting of ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-hexene copolymer, ethylene-octene copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, high-density polyethylene, low-density polyethylene, linear low-density polyethylene and isobutylene-isoprene copolymer (butyl rubber).
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Specification