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:
Oct. 04, 1983
Filed:
Dec. 21, 1981
Applicant:
Inventor:
Thomas A Hardy, Fairfield, CT (US);
Assignee:
Stauffer Chemical Company, Westport, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
260970 ; 260931 ; 260935 ; 260969 ;
Abstract
A process for the preparation of organic phosphate-phosphonates comprises the steps of reacting an organic acylating agent with an organophosphite triester to form an intermediate followed by reacting the intermediate with an organophosphite diester. Typically benzoyl chloride is the acylating agent, triethyl phosphite and bis (.beta.-chloroethyl) phosphite the sequential reactants, and the second step is carried out in the presence of a catalytic amount of a tertiary amine. A solvent such as methylene dichloride may be employed. Organic phosphate-phosphonates are useful as flame retardants, especially in urethane foams.