CPC C08L 53/025 (2013.01) [C08J 9/122 (2013.01); C08L 91/00 (2013.01); C08J 2201/03 (2013.01); C08J 2201/032 (2013.01); C08J 2203/06 (2013.01); C08J 2203/08 (2013.01); C08J 2205/044 (2013.01); C08J 2207/10 (2013.01); C08J 2353/02 (2013.01)] | 18 Claims |
1. A polymer composition for manufacturing a foam, the polymer composition comprising a vinyl aromatic based copolymer and a processing aid, wherein the amount of the processing aid in the total weight of the polymer composition is equal to or more than 5 wt % and less than 30 wt %, and the processing aid comprises a process oil, wherein the process oil is aromatic oil, naphthenic oil, or paraffin oil; and the polymer composition does not comprise ethylene-vinyl acetate copolymer, ethylene-butyl acrylate copolymer, homopolymer of polyethylene, homopolymer and copolymer of polypropylene, homopolymer of polybutene, and olefin-based ionic polymer, wherein the vinyl aromatic based copolymer is a hydrogenated copolymer, the weight average molecular weight of the vinyl aromatic based copolymer ranges from 200,000 to 500,000, and wherein monomers of the vinyl aromatic based copolymer include a vinyl aromatic monomer and a conjugated diene monomer, wherein a vinyl aromatic monomer content of the vinyl aromatic based copolymer is 20 wt % to 35 wt %, and a vinyl structure content of the conjugated diene monomer in the vinyl aromatic based copolymer is 30 wt % to 45 wt %.
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