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. 03, 1984
Filed:
Nov. 12, 1982
Thomas A Hardy, Monroe, NY (US);
Fred Jaffe, Ossining, NY (US);
Stauffer Chemical Company, Westport, CT (US);
Abstract
Flame retardant oligomeric phosphate ester compositions having the structural formula: ##STR1## are prepared, wherein R is C.sub.1 -C.sub.10 alkyl or haloalkyl, R.sup.1 and R.sup.2 can be the same or different and are hydrogen, C.sub.1 -C.sub.10 alkyl or haloalkyl and n is an integer from zero to about 10. The method of preparing the compositions comprises reacting P.sub.2 O.sub.5 with a trialkyl or tris(haloalkyl)phosphate in the presence of about 0.01% to about 5% of a phosphite at a temperature from about 0.degree.-200.degree. C. A polyphosphate ester having P--O--P bonds is formed which is then reacted with an epoxide to yield the oligomeric phosphate ester flame retardant compositions. Alternatively, a method of preparing similar compositions comprises reacting P.sub.2 O.sub.5 with a trialkyl or tris (haloalkyl)phosphite at a temperature from about 0.degree. C. to about 200.degree. C. A mixed polyphosphate-polyphosphite ester having P--O--P bonds is formed which is then oxidized to yield a polyphosphate having P--O--P bonds; which is then reacted with an epoxide to yield the oligomeric phosphate ester flame retardant compositions.