Phosphorus and halogen containing polymers of bis-hydroxyethyl terephthalate as flame retardant additives
US4030933A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Apr 7, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L1/12
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a process for preparing phosphorus and halogen containing polymers useful as flame retardant additives in cellulose acetate or cellulose triacetate fibers or films. The phosphorus and halogen containing polymers may be prepared by reacting a halogenated derivative of bis-hydroxyethyl terephthalate with a halogen containing phosphorus monomer having the formula ##STR1## wherein R represents a radical selected from the group consisting of (a) alkyl, (b) bromoalkyl, (c) chloroalkyl, (d) alkylamido and (e) dialkylamido radicals, wherein the alkyl substituents of the foregoing may contain from 1 to 10 carbon atoms, (f) cyclohexyl, (g) phenyl, (h) benzyl, (i) tolyl, and (j) xylyl, and X represents a halogen atom (preferably chlorine or bromine). Cellulose acetate and cellulose triacetate fibers and films containing as little as two percent by weight of the polymeric flame retardant additives are rendered both non-burning and resistant to loss of the polymeric flame retardant additive during use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.