Branched poly(trimethylene ether) polyols
AssigneeE. I. Du Pont de Nemours and Company
InventorsGyorgyi Fenyvesi, Raja Hari Poladi, Hari Babu Sunkara
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Abstract
Disclosed is branched poly(trimethylene ether) polyols prepared from the acid catalyzed polycondensation reaction of 1,3-propanediol, and at least one triol comonomer selected from 1,1,1-tris(hydroxymethyl)ethane and 1,1,1-tris(hydroxymethyl)propane. Also disclosed is a branched poly(trimethylene ether) polyol with an equivalent hydroxyl functionality of about 2.1 to about 3.2 and a Mn of about 200 to about 6000. The polyols are useful in the preparation of polyurethane rigid and flexible foams.
Claims6
A branched amorphous poly(trimethylene ether) polyol comprising repeating units of Formula I, Formula II, and Formula III
- wherein R is methyl and Q is selected from Formula (IIIa) and (IIIb):
- wherein m is 1-20 and n is 1 to 3, and further comprising end groups of Formula IV, V, and VI:
- and wherein the branched poly(trimethylene ether) polyol comprises the repeating units of Formula II and Formula III, together, from about 2.8 mole % to about 10 mole %, and wherein the branched poly(trimethylene ether) polyol is amorphous.
Dependencies are inferred from the claim text.