Patent ID: 8735459

Claim:
A composition for preparing an expandable polypropylene carbonate, comprising: (A) 100 parts by weight of a base resin consisting of (a1) 10 to 90 wt % of a polypropylene carbonate resin and (a2) 10 to 90 wt % of a thermoplastic resin; (B) 0.1 to 20 parts by weight of a compatibilizer, wherein the compatibilizer is a polypropylene carbonate copolymer having a weight average molecular weight of 500 to 1,000,000 g/mol; (C) 0.01 to 10 parts by weight of a cross-linking agent, a chain extender, or a mixture thereof; (D) 0.1 to 10 parts by weight of an inorganic material; and (E) 0.01 to 1 parts by weight of a heat stabilizer.