PREPARATION METHOD OF FOAM USING CROSS-LINKING AID

摘要

PURPOSE: A method for preparing foam is provided to improve the mechanical strength comprising the split tear strength and the compression set of foam by using a metal-based cross-linking aid. CONSTITUTION: The method comprises the steps of adding a cross-linking agent and a foaming agent to a base which comprises an ethylene/α-olefin copolymer, an ethylene/propylene-α-olefin copolymer or their mixtures, a mixture of an ethylene/α-olefin copolymer, a styrene-based copolymer thermoplastic resin or ethylene vinyl acetate resin and rubber, or a mixture of an ethylene/propylene-α-olefin copolymer, a styrene-based copolymer thermoplastic resin or ethylene vinyl acetate resin and rubber; adding 0.1-5 parts by weight of a metal-based cross-linking aid based on 100 parts by weight of the base to the mixture; and cross-linking and foaming the mixture. Preferably the metal-based cross-linking aid is selected from the group consisting of zinc diacrylate, zinc dimethacrylate, zinc methacrylate, modified zinc methacrylate, modified zinc acrylate, modified zinc diacrylate and their mixtures.