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:
Mar. 27, 1984
Filed:
May. 16, 1983
Applicant:
Inventor:
Adolph V DiGiulio, Wayne, PA (US);
Assignee:
Atlantic Richfield Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ;
U.S. Cl.
CPC ...
521 56 ; 521 57 ; 521 59 ; 521 60 ; 521139 ; 521140 ; 525314 ; 525901 ;
Abstract
Expandable vinyl aromatic polymers are produced, which exhibit anti-lumping properties and fast-cool properties upon formation of foamed articles therefrom, by polymerizing a vinyl aromatic monomer, in which is dissolved 0.5-4.0 percent, based on the monomer, of a graded diblock rubbery copolymer of 2-50 percent of polymerized vinyl aromatic monomer and 50-98 percent conjugated diene, the polymerization forming vinyl aromatic polymer containing the graded diblock rubbery copolymer, and impregnating the polymer so produced, with a blowing agent.