公开(公告)号：US20180327565A1

公开(公告)日：2018-11-15

申请号：US15975994

申请日：2018-05-10

Applicant: THE CHEMOURS COMPANY FC, LLC

Inventor： KONSTANTINOS KONTOMARIS ,  TIM MCRAE

IPC: C08J9/14 ,  C08F12/08 ,  C08L25/06 ,  C08L25/12 ,  C08J9/36

CPC classification number: C08J9/146 ,  C08F12/08 ,  C08J9/0066 ,  C08J9/36 ,  C08J2201/03 ,  C08J2203/142 ,  C08J2203/162 ,  C08J2203/182 ,  C08J2205/042 ,  C08J2205/044 ,  C08J2205/052 ,  C08J2325/06 ,  C08J2325/08 ,  C08J2325/12 ,  C08L25/06 ,  C08L25/12 ,  C08L2203/14

Abstract: A process is provided for preparing a thermoplastic polymer foam, comprising providing a foamable composition comprising a thermoplastic polymer and a blowing agent, wherein the blowing agent comprises from 10% to 60% by weight Z-1,1,1,4,4,4-hexafluoro-2-butene (Z-HFO-1336mzz) and from 40% to 90% by weight 1,1-difluoroethane (HFC-152a), and wherein said thermoplastic polymer comprises polystyrene homopolymer, a polystyrene copolymer, styrene-acrylonitrile copolymer, or blends thereof expanding said foamable composition to produce a closed cell, smooth skin polymer foam, having a density of less than 42 kg/m2. Also disclosed is a thermoplastic polymer foam composition comprising a thermoplastic polymer selected from the group consisting of polystyrene homopolymer, a polystyrene copolymer, styrene-acrylonitrile copolymer, or blends thereof, defining a plurality of cells having an average cell size, and a blowing agent comprising from 10% to 60% by weight Z-1,1,1,4,4,4-hexafluoro-2-butene (Z-HFO-1336mzz) and from 40% to 90% by weight 1,1-difluoroethane (HFC-152a), having a density of less than 42 kg/m2, according to ISO method 845-85, wherein the thermoplastic polymer has a melt flow rate of less than 25 g/10 min.