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:
Jul. 05, 1977
Filed:
May. 08, 1975
Carl Leonard Wright, Pasadena, MD (US);
Harry Hoyt Beacham, Severna Park, MD (US);
FMC Corporation, Philadelphia, PA (US);
Abstract
This specification discloses that certain polychlorinated or polybrominated aromatic hydrocarbon compounds can be incorporated in thermosetting polymer compositions to make the thermosetting compositions flame retardant without injuring the desirable physical and electrical properties of the thermosetting compositions when in the thermoset state. These polyhalogenated aromatic hydrocrbons are apparently caused to react into the thermosetting composition, provided there is a minimum of 1 mol of a polyunsaturated monomer containing carbon to carbon unsaturation for each 3 mols of polychlorinated aromatic hydrocarbons. The thermosetting compositions generally contain a polyunsaturated monomer, a polyunsaturated polymer with carbon to carbon double bond unsaturation or a polyphenylene ether polymer which may be used in place of some or all of the polyunsaturated polymer, and a polyhalogenated aromatic hydrocarbon, containing at least 50% by weight combined chlorine or bromine and whose molecular weight is greater than 200. These thermosetting compositions can be heat cured or thermoset by a free radical initiator at a temperature of at least 130.degree. C. and can contain pigments, reinforcing fibers, release agents, coupling agents, and other incidental amounts of additives commonly used in thermosetting resin compositions.