公开(公告)号：US09902828B2

公开(公告)日：2018-02-27

申请号：US15111969

申请日：2015-03-05

Applicant: SEKISUI PLASTICS CO., LTD.

Inventor： Hiroki Oowaki ,  Yuichi Gondoh

IPC: C08J9/18 ,  C08J9/00 ,  C08J9/14 ,  C08J9/232 ,  C08F255/02 ,  C08F285/00 ,  C08L23/06 ,  C08L25/06

CPC classification number: C08J9/18 ,  C08F255/02 ,  C08F285/00 ,  C08J9/0014 ,  C08J9/0019 ,  C08J9/0023 ,  C08J9/0028 ,  C08J9/0061 ,  C08J9/141 ,  C08J9/232 ,  C08J2203/14 ,  C08J2205/052 ,  C08J2325/06 ,  C08J2423/06 ,  C08J2423/08 ,  C08J2431/02 ,  C08J2431/04 ,  C08J2433/04 ,  C08J2433/08 ,  C08L23/06 ,  C08L25/06 ,  C08L23/0853 ,  C08F212/08

Abstract: High-density polyethylene mixed resin particles used as seed particles during seed polymerization, wherein said seed particles contain a mixed resin of 100 parts by weight of high-density polyethylene and 20 to 100 parts by weight of an ethylene copolymer; said high-density polyethylene has a density of 935 to 960 kg/m3 and a softening temperature of 115 to 130° C.; said ethylene copolymer is a copolymer of an ester-based monomer selected from an acrylic acid alkyl ester and an aliphatic saturated monocarboxylic acid vinyl, and etylene, contains 1 to 20% by weight of an ester-based monomer-derived component, and has a softening temperature of 75 to 110° C.; said acrylic acid alkyl ester is selected from methyl acrylate and ethyl acrylate; and said aliphatic saturated monocarboxylic acid vinyl is selected from vinyl acetate and vinyl propionate.