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US 6,713,592 B2Granted
Bis-hydroxyphenyl menthane polyesters and polyester/polycarbonates and methods for preparing same
AssigneeGeneral Electric Company
InventorZhaohui Su
Life of this patent
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Abstract
Polyphthalate polyesters or polyester/polycarbonates are prepared from phthalates and 4,4′-[1-methyl-4-(1-methyl-ethyl)-1,3-cyclohexandlyl]-bisphenol.
Claims39
A bis-hydroxyphenyl menthane (BHPM) polyester copolymer comprising BHPM residues and residues of a dicarboxylic acid.
A method for producing a bis-hydroxyphenyl menthane (BHPM) polyester comprising the steps of:
- (a) combining a diacid or reactive derivative thereof and a BHPM to form a reaction mixture under conditions suitable for esterification to form a BHPM polyester;
- and
- (b) recovering the BHPM polyester.
Dependencies are inferred from the claim text.