Accession Number : AD0276089

Title :   SYNTHESIS OF REGULATED STRUCTURE POLYPHENYLETHERSILOXANE ELASTOMERS

Descriptive Note : Quarterly progress rept. no. 3, 1 Jan-31 Mar 62.

Corporate Author : UNITED STATES RUBBER CO NAUGATUCK CONN CHEMICAL DIV

Personal Author(s) : MacFarlane,Robert , Jr

Report Date : 31 MAR 1962

Pagination or Media Count : 31

Abstract : The yield of the high temperature alkaline hydrolysis of 4,4'-dibromodiphenylether to form 4,4' dihydroxydiphenylether was increased to 47%. Although the role of the copper oxide catalyst is not completely understood, the major side reactions were established. This reaction offers a feasible method for obtaining valuable intermediates for the synthesis of the various p,p'-dihydroxypolyphenylethers. Two copolymers of diphenylether with dimethyl siloxane were prepared. Because of monofunctional, chainstopping compounds formed during the preparation of the 4,4' dihydroxydiphenylether, the copolymers are of low molecular weight. Their thermal stability appears to be excellent. (Author)

Descriptors :   *CATALYSTS, *ELASTOMERS, *HEAT RESISTANT PLASTICS, *POLYMERS, CATALYSIS, COPOLYMERIZATION, COPPER COMPOUNDS, ETHERS, HIGH TEMPERATURE, HYDROLYSIS, HYDROXIDES, INFRARED SPECTROSCOPY, IRON COMPOUNDS, METHYL RADICALS, PHENYL RADICALS, POLYMERIZATION, PRODUCTION, SALTS, SILICONES, STABILITY, SYNTHESIS

Distribution Statement : APPROVED FOR PUBLIC RELEASE