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:
Aug. 23, 1977
Filed:
Feb. 27, 1976
Yoshiya Kametani, Yokohama, JA;
Tetsuro Nakahama, Yokohama, JA;
Atsushi Kawai, Hiroshima, JA;
Koji Mimura, Otake, JA;
Nitto Chemical Industry Co., Ltd., Tokyo, JA;
Mitsubishi Rayon Co., Ltd., Tokyo, JA;
Abstract
A phosphorus-containing polymer having the formula: ##STR1## is produced by reacting a cyclic chlorophosphite compound having the formula ##STR2## a ketone compound having the formula ##STR3## and a triorganophoshite compound having the formula P(OR.sub.4).sub.3 in the presence of an active halide having the formula R.sub.5 -X wherein R.sub.1 is ethylene or propylene, R.sub.2 and R.sub.3 are methyl or ethyl and may be the same or different, R.sub.4 is an alkyl group having 1 to 4 carbon atoms or an aralkyl group in which the alkyl substituent has 1 to 4 carbon atoms and the hydrogen atoms in said alkyl and aralkyl groups may be substituted with chlorine or bromine, R.sub.5 is an unsaturated or saturated aliphatic, alicyclic or aromatic group having 1 to 10 carbon atoms or combinations thereof and R.sub.5 may contain a carbonyl group, sulfonyl group or nitrogen, X is a halogen, and n is an integer of from 1 to 1000.