Random copolymers and crosslinked products of the same

Details Random copolymers and crosslinked products of the same Random copolymers and crosslinked products of the same

1991-05-24

1993-11-16

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526335, 525232, 5253321, 525387, 521 95, 521140, 521150, C08F23620, C08L 4700

Patent

active

052625036

ABSTRACT:
A random copolymer of (a) an .alpha.-olefin having 3 to 12 carbon atoms, (b) a non-conjugated diene represented by the following formula (1): ##STR1## wherein R.sup.1 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each independently represent a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, and n is a number of from 2 to 10, and (c) optionally ethylene, which random copolymer comprises 0.1 to 15 mol % of monomer units of said non-conjugated diene, 0 to 4 mol % of monomer units of ethylene, and pendent ethylenical unsaturations, and has a crystallization degree of 20% or more determined by an X-ray diffraction method, a melt index of 0.01 to 200 g/10 minutes, and a modulus of elasticity according to JIS K-7203 of 1,000 to 30,000 kg/cm.sup.2. The random copolymer can be in the crosslinked form through the pendent ethylenical unsaturation and can also be in the form of a blend of the copolymer with a thermoplastic polymer compatible therewith. The crosslinking can be conducted on the blend of the random copolymer with the thermoplastic polymer, and can also be conducted under the conditions that the random copolymer and/or the thermoplastic polymer are/is foamed whereby the crosslinked product is obtained as a foam.

REFERENCES:
patent: 3351621 (1967-11-01), Baskai
patent: 3481909 (1969-12-01), DiPietro
patent: 4366296 (1982-12-01), Kitagawa et al.
Neilsen, "Mechanical Properties of Polymers . . . ", Marcel Dekker, Inc., N.Y., 54-56 (1974).
Patent Abstracts of Japan, vol. 14, No. 220 (C-717) [4163], May 10, 1990 & JP-A-2 51 512 (Japan Synth. Rub) Feb. 21, 1990.
Patent Abstracts of Japan, vol. 14, No. 334 (C-742) [4277], Jul. 18, 1990; & JP-A-2 123 114 (Jap Synth. Rub) Oct. 5, 1990.
FR-A-1 295 575 (E. I. Du Pont) *Claims; p. 1, right-hand column, paragraph 1.

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