Thermally stabilized butadiene resins containing a hindered phen

Details Thermally stabilized butadiene resins containing a hindered phen Thermally stabilized butadiene resins containing a hindered phen

1987-06-22

1988-09-27

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

560140, C08K 510

Patent

active

047742747

ABSTRACT:
A process for producing a bisphenol compound useful as deterioration preventor capable of stabilizing organic substances against the decompositions caused by heat, light and oxygen, represented by the following general formula: ##STR1## wherein R.sub.1 represents alkyl group having 1 to 3 carbon atoms, alkenyl group having 2 to 4 carbon atoms, phenyl group or 2-phenylethenyl group; R.sub.2 represents alkyl group having 1 to 5 carbon atoms, or cyclohexyl group; R.sub.3 represents alkyl group having 1 to 9 carbon atoms, cyclohexyl group or phenyl group; and R.sub.4 represents alkyl group having 1 to 11 carbon atoms or phenyl group, which comprises reacting a carboxylic acid represented by the following general formula: ##STR2## wherein R.sub.1 is as defined above, with a bisphenol compound represented by the following general formula: ##STR3## wherein R.sub.2, R.sub.3 and R.sub.4 are as defined above, by the use of a halogenating agent in the presence of a dehydrohalogenating agent, as well as butadiene polymer compositions containing said bisphenol compounds.

REFERENCES:
patent: 4168387 (1979-09-01), Cottman
patent: 4365032 (1982-12-01), Yosizato et al.
patent: 4562281 (1985-12-01), Takahashi et al.

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