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. 22, 2001
Filed:
Oct. 13, 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
These novel brominated styrenic polymers have a bromine content in the range of about 60 to about 66 wt % bromine; a total chlorine content, if any, of less than 700 ppm; a GPC weight average molecular weight in the range of about 500,000 to about 800,000; a DSC glass transition temperature of less than 175° C.; and a thermal stability in the Thermal Stability Test of 250 ppm HBr or less. Such flame retardant polymers exhibit superior performance qualities during use, especially in thermoplastics, including improved melt flow characteristics and improved thermal stability.