Meta, para-substituted isopropylidene bisphenols and methods for making
AssigneeGeneral Electric Company
InventorDonald E. Keeley
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Abstract
Meta,para-substituted isopropylidene bisphenols are provided and methods for making such materials. Phenol, or substituted phenol is condensed with a meta-substituted isopropenyl phenol or a meta-hydroxy-.alpha.,.alpha.-dimethylbenzyl alcohol in the presence of an acid catalyst. The resulting meta,para-substituted isopropylidene bisphenols can be used as stabilizers for polyvinyl chloride resins and as intermediates for making high performance thermoplastics having chemically combined meta,para-isopropylidene diphenoxy units.
Claims7
Bisphenols of the formula, ##STR15## where R is a monovalent radical selected from C.sub.(1-8) alkyl radicals, and C.sub.(1-4) alkoxy radicals, X is a halogen radical selected from chloro and bromo, a is a whole number having a value of from 0 to 3 inclusive, b is a whole number having a value of 0 to 2 inclusive and the sum of a+b has a value of 0 to 4 inclusive.
A bisphenol of the formula, ##STR16##
A bisphenol of the formula, ##STR17##
A bisphenol of the formula, ##STR18##
A bisphenol of the formula, ##STR19##
A method for making a bisphenol of the formula, ##STR20## which comprises (A) effecting reaction between a phenol of the formula, ##STR21## and a meta-substituted phenol selected from the class consisting of ##STR22## in the presence of an acid catalyst and at a temperature of from 0.degree. C. to 100.degree. C., and
- (B) recovering the bisphenol from the mixture of (1),
- where R is a monovalent radical selected from C.sub.(1-8) alkyl radicals C.sub.(1-4) alkoxy radicals, X is a halogen radical selected from chloro and bromo, c is a whole number equal to 0 to 3 inclusive, d is a whole number equal to 0 to 2 inclusive and the sum of c and d is equal to 0 to 4 inclusive.
A method for making meta,para-bisphenol-A of the formula, ##STR23## which comprises (a) effecting contact between phenol and a meta-substituted phenol selected from, ##STR24## (b) recovering the meta, para-bisphenol from (a).
Dependencies are inferred from the claim text.