| 摘要 |
PURPOSE:To obtain the title mixture which can give a foamed molding excellent in heat resistance merely by heating without any pretreatment, by mixing a propylene polymer with two specified copolymers and a blowing agent at a specified ratio. CONSTITUTION:The title mixture comprising a propylene polymer (A), a copolymer (B) comprising ethylene-derived units and units derived from a polar monomer selected from among alpha,beta-unsaturated carboxylic acids, a copolymer (C) comprising ethylene-derived units and units derived from an ethylenically unsaturated monomer having a polar group selected from OH and epoxy groups and a blowing agent (D) which can be decomposed at 50-250 deg.C. Said component A is present in an amount of 40-99.7wt.%, said component B is present in an amount of 1-99wt.%, based on said components B and C, the molar ratio of the total of the COOH groups and the carboxylic anhydride groups in component B to the total of the OH groups and the glycidyl groups in component C) is 0.2:1-5:1, the content of said ethylene-derived units in the two copolymers is 30-99.5wt.%, the content of said polar monomer-derived units is 0.1-70wt.%, and the content of said component D is 0.1-50pts.wt. per 100pts.wt. total of components A, B and C. |
