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US 2010/0160672 A1Published application
Process for the production of acrylic and methacrylic esters of poly(trimethylene ether) glycol
AssigneeE. I. Du Pont de Nemours and Company
InventorsGyorgyi Fenyvesi, Raja Hari Poladi, Hari Babu Sunkara
Life of this patent
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Abstract
Processes are provided for producing novel (meth)acrylic esters of poly(trimethylene ether) glycol. The processes include reacting poly(trimethylene ether) glycol with (meth)acrylic acid or equivalents thereof.
Claims9
A process for making a (meth)acrylic acid ester of a polytrimethylene ether glycol comprising:
- a) polycondensation of hydroxyl groups-containing monomers predominantly comprising 1,3-propanediol obtained biochemically from a renewable source in the presence of acid catalyst at temperatures between 100 to 250° C. to form a poly(trimethylene ether) glycol
- b) esterifying the obtained poly(trimethylene ether) glycol with an acrylic compound in the presence of a polymerization inhibitor(s) and optionally a solvent at temperatures between 25 to 250° C.
A process for making a a(meth)acrylic acid ester of a polytrimethylene ether glycol comprising:
- reacting poly(trimethylene ether) glycol having a number average molecular weight from 134 to 5000 with (meth)acrylic acid in the presence of an esterification catalyst, a polymerization inhibitor and optionally a solvent at temperatures between 25 to 250° C.
A process for making a (meth)acrylic acid ester of a polytrimethylene ether glycol comprising:
- reacting poly(trimethylene ether) glycol with (meth)acrylic acid halide in the presence of an organic base or a catalyst at temperatures between 5 to 150° C.
Dependencies are inferred from the claim text.