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. 28, 1977
Filed:
Jan. 30, 1976
Walter O Pillar, Monroeville, PA (US);
ARCO Polymers, Inc., Philadelphia, PA (US);
Abstract
Expandable styrene polymer particles having reduced flammability are made by incorporating from 0.1 to 15 weight per cent of organic halogen compounds into the polymer during impregnation of the polymer particles with a blowing agent in aqueous suspension. Temperatures greater than 90.degree. C., during the impregnation step, often cause degradation of the halogen compound and subsequent degradation of the polymer at the particle surface. The addition of certain thermal stabilizers, such as a mixture of a modified epoxidized soybean oil and a barium/cadmium organic complex, stabilizes the halogen compounds in the suspension system to temperatures up to 115.degree. C.