INDUSTRIAL FOAM USING STYRENE-BUTADIENE-STYRENE COPOLYMER AS THERMOPLASTIC ELASTOMER, CROSSLINKING AGENT, CO-CROSSLINKING AGENT AND FOAMING AGENT

摘要

PURPOSE: An industrial foam using a styrene-butadiene-styrene copolymer is provided, to reduce manufacturing cost and to improve impact absorbing property, impact resilience and compression set. CONSTITUTION: The industrial foam comprises 100 parts by weight of a styrene-butadiene-styrene block copolymer or blend as a thermoplastic elastomer; 0.01-2.5 parts by weight of a crosslinking agent; 0.1-1.0 parts by weight of a co-crosslinking agent; and 1-10 parts by weight of a foaming agent. Preferably the foam comprises a mixture of 20-99 parts by weight of a styrene-butadiene-styrene block copolymer and 1-80 parts by weight of a polymer for blend instead of the styrene-butadiene-styrene block copolymer. Preferably the polymer for blend is at least one selected from the group consisting of an ethylene-vinyl acetate copolymer, an ethylene--olefin copolymer, a butadiene rubber, an isoprene rubber, an ethylene-propylene rubber, a butyl rubber, a styrene-butadiene rubber, a dielectric rubber which is obtained by adding an oil to the rubbers, 1,2-polyethylene, polybutadiene and polystyrene-polyvinyl-isoprene terpolymer.