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US 5,344,999 AGranted
1,3-bis(4-hydroxyphenyl)-1,3-dialkylcyclohexanes and polycarbonates prepared therefrom
AssigneeGeneral Electric Company
InventorJohn C. Schmidhauser
Life of this patent
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Abstract
1,3-Bis(4-hydroxyphenyl)-1,3-dialkylcyclohexanes, as illustrated by 1,3-bis(4-hydroxyphenyl)-1, 3-dimethylcyclohexane, may be prepared by the reaction of phenol with a 1,5-dialkyl-1,4-cyclohexadiene under acidic conditions. Polycarbonates prepared therefrom have high glass transition temperatures and are expected to be ductile.
Claims4
A 1,3-bis(4-hydroxyphenyl)-1,3-dialkylcyclohexane of the formula ##STR5## wherein R is a C.sub.1-4 primary alkyl radical.
Dependencies are inferred from the claim text.