Heat-shrinkable or heat-expandable products from hydrogenated po

Details Heat-shrinkable or heat-expandable products from hydrogenated po Heat-shrinkable or heat-expandable products from hydrogenated po

1979-07-25

1981-01-13

Hamrock, William F.

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

Synthetic resins

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

525338, 525339, C08F 804

Patent

active

042450659

ABSTRACT:
An article of manufacture having heat-alterable memory characteristics consisting of a shaped, vulcanized composition comprising a hydrogenated polybutadiene which in its unhydrogenated state contains from about 15 to about 55 percent trans 1,4-addition and from about 15 to about 40 percent cis 1,4-addition, the article being in a dimensionally heat-unstable condition capable of altering its physical form upon application of heat alone. The article is produced by hydrogenating the above-described polybutadiene, shaping and vulcanizing the hydrogenated polybutadiene and subjecting the shaped, vulcanized article to a force sufficient to alter its dimensions.

REFERENCES:
patent: 3525729 (1970-08-01), Gaeth
patent: 3541064 (1970-11-01), Yoshimoto et al.
patent: 3580897 (1971-05-01), Yoshimoto et al.
patent: 3673281 (1972-06-01), Bronstent et al.
patent: 3835053 (1974-09-01), Meier et al.
patent: 3993855 (1976-11-01), Kang
patent: 4187360 (1980-02-01), Peters

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