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:
Jun. 14, 1988
Filed:
May. 14, 1986
Applicant:
Inventors:
Roger J White, Pittsburgh, PA (US);
Sivaram Krishnan, Pittsburgh, PA (US);
Assignee:
Mobay Corporation, Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
521 94 ; 521134 ; 521138 ; 521139 ; 521180 ; 521182 ;
Abstract
The present invention relates to an improvement in preparing foamed thermoplastic articles. It was found that a chemical blowing agent concentrate which contains a blowing agent which produces primary amines upon decomposition and additionally contains an anhydride compound which contains at least one cyclic anhydride in its structure, offers surprising advantages over the prior art process in terms of improved impact strength and process flexibility.