Process for the production of bifunctional polyphenylene ethers

Details Process for the production of bifunctional polyphenylene ethers Process for the production of bifunctional polyphenylene ethers

C - Chemistry, Metallurgy

07

C

402/359, 260/600

C07C 39/15 (2006.01) C07C 41/01 (2006.01) C07C 43/295 (2006.01) C08G 18/48 (2006.01) C08G 18/50 (2006.01) C08G 63/66 (2006.01) C08G 65/38 (2006.01) C08G 65/44 (2006.01)

Patent

CA 1204453

ABSTRACT OF THE DISCLOSURE The invention relates to a new process for the production of polyphenylene oxides corresponding to the following formula (I): Image (I) in which R may be the same or different at each position and represents hydrogen, an alkyl radical containing from 1 to 4 carbon atoms or an aryl radical containing up to 6 carbon atoms, represents a group of the formula R1-?-R1, where R1 represents hydrogen or an alkyl radical containing from 1 to 4 carbon atoms, -O-, -?-, -S- or -SO2-, and m and n are integers from 1 to 200, characterised in that a mixture of phenols corresponding to the following formulae (II) and (III): Image (II) Image (III) in which R may be the same or different at each position and has the same meaning as in formula (I), is reacted with oxygen in an organic solvent in the presence of a catalyst at a temperature of from -80 to 100°C and optionally under elevated pressure. Polymer blocks containing two functional terminal groups and having a high glass transition temperature may be obtained by the process according to the invention. These blocks may be reacted, for example, with acid chlorides, such as phosgene or terephthaloyl- chloride, with diisocyanates, with carbonates and with other polymer blocks to form high molecular weight compounds. Materials produced from these high molecular weight compounds are distin- guished by their high dimensional stability under heat.

449015

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