Vibration damper composition
First Claim
1. 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.
1 Assignment
0 Petitions
Accused Products
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.
-
Citations
17 Claims
-
1. 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 15and the loss tangent (tan δ
) value as found by said measurement is not smaller than 0.4 at 0°
C. to 40°
C. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 16, 17)
- ) value at 0°
-
10. 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 10,000and said polymer block (b) being comprised of isobutylene as a constituent monomer. - View Dependent Claims (11, 12, 13, 14, 15)
- ) comprising a polymer block (a′
Specification