Patent · US Expired

Method for the preparation of polymer foams

US4314035A · kind A · utility

6Cited by

7References

25Claims

0Family size

Assignee

Ruhrchemie Aktiengesellschaft · DE

Inventors

John Hobes · Dinslaken, DE
Wolfgang Payer · Ulm, DE

Key dates

Filing date	Aug 20, 1980
Grant date	Feb 2, 1982
Priority date	—
Expiry date	Aug 20, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2423/00
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Foamable copolymers and copolymer mixtures comprising 35% to 98% by weight ethylene, 1% to 30% by weight vinyl alcohol, 1% to 30% by weight acrylic acid esters of secondary or tertiary alcohols, and 0 to 5% by weight vinyl ester are disclosed. All percentages are based upon the total weight of the copolymer or mixture. Methods of foaming such materials, foamed materials made therefrom, and methods of preparation thereof are also disclosed.

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