Patent · US Active

Styrene-acrylonitrile copolymer foam with minimal yellowing

US9051438B2 · kind B2 · utility

1Cited by

7References

4Claims

0Family size

Assignee

DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

Lawrence S. Hood · Midland, US
Brian H. Deshano · Sanford, US
David Frankowski · Woodhaven, US

Key dates

Filing date	May 4, 2011
Grant date	Jun 9, 2015
Priority date	—
Expiry date	Jan 20, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2325/12
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Prepare polymeric foam articles having low yellowing using a styrene-acrylonitrile copolymer that contains less than 145 weight-parts acrylonitrile dimer and less than 8,500 weight-parts acrylonitrile trimer per million weight parts acrylonitrile copolymer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.