Polycarbonates having sulfur-containing phenolic diols incorporated therein
AssigneeMobay Chemical Corporation
InventorsArthur L. Baron, Sivaram Krishnan, Joseph R. Thomas
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Abstract
Polycarbonate resins are based upon the reaction of an aromatic diol and a carbonic acid derivative. A sulfur containing difunctional phenolic compound represented by the structural formula: ##STR1## wherein R.sub.1 is a lower alkyl having 1 to 4 carbon atoms and "n" equals 0 to 4 and X is S or SO.sub.2 either totally or partially substitutes for said aromatic diol. Polycarbonates prepared in accordance with the invention exhibit good heat distortion characteristics and long term aging properties.
Claims11
A monomer of the structural formula ##STR7## wherein R.sub.1 is a lower alkyl having 1 to 4 carbon atoms, n is an integer from 0 to 4 and x is uniformly either S or SO.sub.2.
A monomer, 4,4'-bis(p-hydroxyphenylthio)-phenylsulfone of the structural formula ##STR8##
A monomer, 4,4'-bis(p-hydroxyphenylsulfonyl)-phenylsulfone of the structural formula ##STR9##
A thermoplastic aromatic polycarbonate comprising the reaction product of
- (i) a monomer of the structural formula ##STR10## wherein R.sub.1 is a lower alkyl having 1 to 4 carbon atoms,
- n is an integer from 0 to 4, and
- X is uniformly either S or SO.sub.2
- (ii) a carbonic acid derivative and optionally,
- (iii) an aromatic diol.
The method of preparing a thermoplastic aromatic polycarbonate comprising reacting
- (i) a monomer of the structural formula ##STR13## wherein R is a lower alkyl having 1 to 4 carbon atoms,
- n is an integer 0 to 4 and is uniformly either S or ##STR14## with (ii) a member selected from the group consisting of a carbonyl bromide, phosgene, a bis-chloroformic ester of (i) or of an aromatic diol, with optionally
- (iii) an aromatic diol.
Dependencies are inferred from the claim text.