VINYL CHLORIDE FOAMABLE RESIN COMPOSITION

PURPOSE:To prepare the titled resin composition capable of forming fine and uniform cells even by the atmospheric foaming method, and giving a foamed article having high expansion ratio and excellent rubber elasticity, heat resistance, and chemical resistance, by compounding an acrylic rubber and a crosslinking agent to a vinyl chloride resin. CONSTITUTION:The objective composition is prepared by compounding (A) 100pts.wt. of a vinyl chloride (co)polymer preferably having an average polymerization degree of 700-1,900, (B) 0.5-30pts.wt. of an acrylic rubber which is a copolymer composed of an alkyl acrylate as a main component and an active group (preferably epoxy group, or hydroxyl group) making a crosslinking point as a subsidiary component, (C) 0.1-5pts.wt. of a crosslinking agent which is a compound having two or more functional groups reactive with the active group of the component (B), (e.g. tolylene diisocyanate), (D) 1-20pts.wt. of a decomposing-type foaming agent, (E) 1-5pts.wt. of a stabilizer, and (F) 40- 180pts.wt. of a plasticizer. The modifying effect of the combined use of the components (B) and (C) is remarkable when the ratio of expansion is as high as >=7.