US 5,290,877 A · Information recording medium and adhesive composition therefor

Abstract

An information recording medium formed by adhering, with an adhesive composition, two disk substrates to each other, at least one of the two disk substrates having a recording layer on at least one surface of a transparent resin substrate thereof and the adhesive composition comprising (1) the following components: (A) an .alpha.-olefin polymer, (B) an ethylene/(meth)acrylate copolymer, (C) a styrene-type polymer, and (D) a tackifier provided that at least one of the components (A) to (D) is modified with an unsaturated carboxylic acid or a derivative thereof, or (2) the following components: (A) an .alpha.-olefin polymer, (C) a styrene-type polymer, (D) a tackifier, and (E) fine filler particles.

Claims8

Dependent claims

A hot-melt adhesive composition comprising the following components (A) to (D):

(A) 1 to 68% by weight of an .alpha.-olefin polymer, said .alpha.-olefin polymer being a mixture which contains 1 to 60% by weight of an ethylene/propylene copolymer, 1 to 60% by weight of a propylene polymer and 1 to 30% by weight of an isobutylene polymer;
(B) 1 to 30% by weight of an ethylene/(meth)acrylate copolymer,
(C) 1 to 30% by weight of a styrene polymer, and
(D) 30 to 95% by weight of a tackifier,
provided that at least one of the components (A) to (D) is modified with an unsaturated carboxylic acid or a derivative thereof, said derivative being selected from the group consisting of an acid halide, amide, imide, anhydride and ester.

2 more elements

Dependencies are inferred from the claim text.

Information recording medium and adhesive composition therefor

Life of this patent

Information recording medium and adhesive composition therefor

Life of this patent

Abstract

Claims8