Process for preparing hydroxy-functionalized polyesters
AssigneeThe Dow Chemical Company
InventorsJohn M. Beckerdite, Shari L. Kram, Ramki Subramania, Jerry E. White, Michael N. Mang
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Abstract
A process for preparing a thermoplastic hydroxy-functionalized polyester comprises contacting a dicarboxylic acid or a mixture of dicarboxylic acids with a diepoxide in a given solvent in the presence of an end-capping agent and a catalyst under conditions sufficient to form the hydroxy-functionalized polyesters or polyethers.
Claims27
A process for preparing thermoplastic hydroxy-functionalized poly(ester ethers) or polyesters which comprises providing a reaction mixture of at least one dicarboxylic acid and a diepoxide, adding an end-capping agent to the reaction mixture and subjecting the reaction mixture in the presence of a catalyst and a solvent under conditions sufficient to form the hydroxy-functionalized polyesters.
A process for preparing thermoplastic hydroxy-functionalized poly(ester ethers) or polyesters which comprises providing a reaction mixture of at least one dicarboxylic acid and a diepoxide, reacting the dicarboxylic acid and diepoxide in the presence of a catalyst and a solvent under conditions sufficient to form the hydroxy-functionalized polyesters and adding an end-capping agent to the reaction prior to the point at which the product reaches maximum peak or number average molecular weight.
A process for preparing thermoplastic hydroxy-functionalized poly(ester ethers) or polyesters which comprises providing a reaction mixture of at least one dicarboxylic acid and a diepoxide, reacting the dicarboxylic acid and diepoxide in the presence of a catalyst and a solvent under conditions sufficient to form the hydroxy-functionalized polyesters and adding an end-capping agent to the reaction at the point at which the product reaches maximum peak or number average molecular weight.
Dependencies are inferred from the claim text.