The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 20, 1981
Filed:
Jul. 09, 1979
Applicant:
Inventors:
John V Hobes, Dinslaken, DE;
Wolfgang Payer, Wesel, DE;
Assignee:
Ruhrchemie Aktiengesellschaft, Oberhausen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
521 77 ; 521 98 ; 521141 ; 521149 ; 525 62 ;
Abstract
A foamable copolymer comprising 40 to 98 percent by weight units of ethylene, 1 to 30 weight percent units of vinyl alcohol, 1 to 30 weight percent units of acrylic acid ester of a secondary or tertiary alcohol, and up to 2 percent by weight of vinyl acetate units is described together with a process for the manufacture thereof. The same is useful in the formation of a foamed mass which is relatively highly cross-linked. The copolymer can be foamed to form a foam by heating the same at 250.degree. to 350.degree. C. for 5 to 60 minutes in the absence of oxygen.