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. 13, 1987
Filed:
May. 21, 1986
Applicant:
Inventors:
Ernest R Kamens, Tonawanda, NY (US);
John P Cassoni, Grand Island, NY (US);
Assignee:
Pennwalt Corporation, Philadelphia, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
521 95 ; 521 96 ; 521 99 ; 521128 ; 521138 ;
Abstract
Low density foams are prepared from an admixture which comprises an unsaturated polyester resin, a free radical initiator which initiator is activated at temperatures from about 100.degree. to about 400.degree. F., and a compound selected from a t-alkylhydrazinium salt or a carbonylhydrazine. The low density foams have uniform cell structure without cracks or voids and the process is efficient.