Preparation of bromine-containing polymers useful as flame retardants
US10336858B2 · kind B2 · utility
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14References
6Claims
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Key dates
| Filing date | Jul 7, 2015 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Dec 6, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L51/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a process for preparing bromine-containing polymer, comprising a Friedel-Crafts alkylation reaction of tetrabromoxylylene dihalide, or tetrabromoxylylene dihalide in combination with pentabromobenzyl halide, with a reactant having one or more six-membered aromatic rings, wherein the reaction takes place in a solvent in the presence of a Friedel-Crafts catalyst, and isolating from the reaction mixture the bromine-containing polymer. The so-formed polymers and their use as flame retardants form additional aspects of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.