US 11,746,226 B2
Polymer composition, foam and method thereof
Hsi-Hsin Shih, Kaohsiung (TW); Chia-Hung Hsu, Kaohsiung (TW); Pang-Hsuan Lin, Kaohsiung (TW); and Yun-Shiuan Yeh, Kaohsiung (TW)
Assigned to TSRC CORPORATION, Kaohsiung (TW)
Filed by TSRC Corporation, Kaohsiung (TW)
Filed on Dec. 5, 2019, as Appl. No. 16/704,166.
Claims priority of provisional application 62/775,990, filed on Dec. 6, 2018.
Prior Publication US 2020/0224023 A1, Jul. 16, 2020
Int. Cl. C08L 53/02 (2006.01); C08J 9/00 (2006.01); C08L 91/00 (2006.01); C08J 9/12 (2006.01)
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
OG exemplary drawing
 
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 %.