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US 4,539,384 AGranted
Polymers prepared from 4,4'-bis(4-hydroxyphenyl thio)biphenyls
AssigneeMobay Chemical Corporation
InventorsSivaram Krishnan, John R. Sanderson
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Abstract
The present invention relates to the novel monomer 4,4'-bis(4-hydroxyphenyl thio)biphenyl, to a process for its production and to its use in the preparation of polycarbonates, polyurethanes, polyesters, polysulfones and polyethers.
Claims1
A copolymer resin comprising structural units derived from ##STR3## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently are C.sub.1 -C.sub.4 alkyl, chlorine or bromine and n.sub.1, n.sub.2, n.sub.3 and n.sub.4 independently are 0, 1 or 2, said polymer selected from the group consisting of polyurethane, polyester, polysulfone and polyether.
Dependencies are inferred from the claim text.