Method for producing phosphorus-containing polymers
US4044076A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 27, 1976 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Feb 27, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/2697
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.