Shape-memorizing block copolymer composition

Details Shape-memorizing block copolymer composition Shape-memorizing block copolymer composition

1991-04-26

1993-12-14

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525 48, 525 99, 525232, 525237, 526340, 526346, 526347, C08L 5302, C08F23604

Patent

active

052703886

ABSTRACT:
A shape-memorizing block copolymer composition characterized by comprising a block copolymer component (I) composed of (A) at least two polymer segments (polymer segments A) having a glass transition temperature of 60.degree. C. to 250.degree. C. and (B) at least one amorphous polymer segment (polymer segment B) having a glass transition temperature which is not lower than -20.degree. C. but lower than the lowest glass transition temperature within those of said polymer segments A with a difference not less than 20.degree. C., the proportion of whole of said polymer segments A to whole of said polymer segment B being in the range of (10/90) to (70/30) by weight; and a rubbery polymer component (II) having a glass transition temperature lower than -20.degree. C., the proportion of said component (I) to said component (II) being in the range of (50/50) to (98/2) by weight.

REFERENCES:
patent: 4193899 (1980-03-01), Brenner et al.
patent: 4945127 (1990-07-01), Kagawa et al.
patent: 5043396 (1991-08-01), Kitahara et al.
Asahi Chemical Ind. KK, "Low Draw Temperature Composition Contain Block Copolymer Contain Plastic Non Plastic Polymer Segment Polyvinyl Aromatic Hydrocarbon Conjugate Polydiene", Nov. 1985, JP-A-60 223 812.
Asahi Chemical Ind. KK, "Shape Memory Resinous Material Containing Crystal Block Copolymer Polystyrene Trans Butadiene Di Phenyl Carbonate", Jul. 1988, JP-A-63 179 955.
Asahi Chemical Ind. KK, "Heat Sensitive Shape Memory Resin Bumper Crystal Block Copolymer Aromatic Polyvinyl Compound Conjugate Diene Car", Jan. 1990, JP-A-2 022 355.

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