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:
Dec. 16, 1980
Filed:
Jun. 01, 1979
Applicant:
Inventors:
Assignee:
Otsuka Chemical Co., Ltd., Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09D / ;
U.S. Cl.
CPC ...
106 1814 ; 106 1815 ; 106 1816 ; 106 1817 ; 106 1818 ;
Abstract
A water-soluble flame retarder comprising a condensed ammonium phosphate having an average degree of condensation of not more than 60 and a mixture of urea compounds produced from urea in the presence of a condensed ammonium phosphate, the mixture containing biuret and triuret. The flame retarder is advantageously prepared by reacting urea and phosphoric acid in a particular manner to by-produce particular amounts of biuret and triuret.