Thermostable polyester

Details Thermostable polyester Thermostable polyester

1974-06-05

1977-02-01

Schain, Howard E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 338R, C08G 6318

Patent

active

040061205

ABSTRACT:
A process for the preparation of a thermostable polyester which is insoluble in tetrachloroethane and consists of about 40 to 200 units, said polyester having units of the formula ##STR1## combined with units of the formula ##STR2## wherein Ph is ##STR3## AND BOTH R radicals are methyl on some units and both R radicals are phenyl on the balance of the units, said methyl units comprising 5-30 mole percent of the total R-containing units which comprises heating and condensing in the absence of a catalyst 4,4'-dihydroxytetraphenylmethane having a melting point of at least 295.degree. C together with 2,2-bis-(4-hydroxyphenyl)-propane and terephthalic or isophthalic acid dichloride until there is prepared said polyester which is insoluble in tetrachlorethane.

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patent: 3128264 (1964-04-01), Laakso et al.
patent: 3133898 (1964-05-01), Keck
patent: 3216970 (1965-11-01), Conix
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Ind. and Eng. Chem., Conix, vol. 51, No. 2, Feb., 1969, pp. 147-150.
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Chem. Abstracts, vol. 52, 1958, 20028f-20028h, Korshak et al.
Dokl. Akad. Nauksssr, 156(4), pp. 880-883 (1964), Korshak et al.
Chem. Abstracts, vol. 61, 1964, 8419a-8419b, Korshak et al.
Chem. Abstracts, vol. 74, 1971, 4033p, Behr-Date 10/1/70.
Chem. Abstracts, vol. 60, 1964, 14620a-14630b Korshak et al.
Chem. Abstracts, vol. 64, 1966, 6766e-6766f, Korshak et al.

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