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:
May. 15, 2001
Filed:
Sep. 10, 1998
Billie B. Dadgar, Baton Rouge, LA (US);
Donald E. Balhoff, Baton Rouge, LA (US);
Charles H. Kolich, Baton Rouge, LA (US);
Meng-Sheng Ao, Baton Rouge, LA (US);
Homer C. Lin, Baton Rouge, LA (US);
Albemarle Corporation, Richmond, VA (US);
Abstract
Novel brominated styrenic polymers have an ionic bromine content of 2000 ppm or less, and one or more of the following additional characteristics: (a) a TGA temperature for 1% weight loss which is 340° C. or higher, and a chlorine content, if any, of less than about 700 ppm Cl (b) an actual M,which is within about 20% of the calculated theoretical M,, the theoretical M,being based upon the actual bromine content of the brominated styrenic polymer and the M,of the styrenic polymer reactant used to produce the brominated styrenic polymer; and (c) essentially no content of impurities selected from the group consisting of ethylene dichloride, bromodichloroethane, dibromochloroethane, dibromodichloroethane, and tribromochloroethane. Such flame retardant polymers exhibit superior performance qualities during use, especially in thermoplastics such as glass-filled polyesters and glass-filled nylons.