Polymer composition of olefin/carboxylic acid copolymer and elastomer
AssigneeMitsui Petrochemical Industries, Ltd.
InventorRiichiro Nagano
Life of this patent
Estimating the term…
Abstract
A polymer composition comprising (A) 81 to 99 parts by weight of a copolymer containing olefin units and unsaturated carboxylic acid compound units and having an intrinsic viscosity [.eta.] of 0.5 to 10 dl/g and a crystallinity of at least 20%, and (B) 19 to 1 part by weight of a thermoplastic elastomer having an initial modulus of not more than 100 kg/cm.sup.2, a glass transition temperature of not more than 0.degree. C. and a weight average molecular weight (Mw) of at least 400,000. The above composition is useful as an adhesive.
Claims16
A polymer composition comprising
- (A) 88 to 95 parts by weight of a copolymer containing olefin units and unsaturated carboxylic acid compound units and having an intrinsic viscosity [.eta.] of 0.5 to 10 dl/g and a crystallinity of at least 20%, and
- (B) 12 to 5 parts by weight of a thermoplastic elastomer selected from the group consisting of polyisobutylene and polyhexene-1 having an initial modulus of not more than 100 kg/cm.sup.2, a glass transition temperature of not more than 0.degree. C. and a weight average molecular weight (Mw) of at least 400,000, said elastomer being dispersed in the form of particles having an average circle equivalent diameter of 0.1 to 5 microns in a matrix of the copolymer (A).
A polymer composition having adhesion to polar materials comprising
- (A) 88 to 95 parts by weight of a copolymer of ethylene with from 10.sup.-6 to 5.times.10.sup.-3 gram-equivalent, per gram of the copolymer (A) of an unsaturated carboxylic acid compound selected from the group consisting of acrylic acid, methacrylic acid, and maleic anhydride, said copolymer having an intrinsic viscosity [.eta.] of 0.7 to 7 dl/g and a crystallinity of at least 25%, and
- (B) 12 to 5 parts by weight of a thermoplastic elastomer having an initial modulus of not more than 80 kg/cm.sup.2, a glass transition temperature of from -130.degree. to -20.degree. C. and a weight average molecular weight (Mw) of at least 500,000, said elastomer (B) being dispersed in the form of particles having an average circle equivalent diameter of 0.1 to 5 microns in a matrix of the copolymer (A).
Dependencies are inferred from the claim text.