Biobased polyester polyol and polyurethane foam system containing the same
AssigneeBASF SE
InventorsJian Feng XU, Zu Bao NIE
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Abstract
In one aspect, a polyester polyol, includes a condensation product of a biobased C7-C12 dicarboxylic acid, a biobased C2-C10 diol, and a branched diol having a formula of (I) where R1 and R2 are independently a linear alkylene linkage having 1 to 3 carbon atoms, and R3 and R4 are independently an alkyl group having 1 to 3 carbon atoms, and wherein the weight ratio of the biobased C2-C10 diol to the branched diol is (25-53) to (47-75). Also provided is a polyurethane system comprising the polyester polyol and a process of preparing the polyester polyol.
Claims15
A polyester polyol, comprising a condensation product of:
- a biobased C7-C12 dicarboxylic acid;
- a biobased C2-C10 diol;
- and
- a branched diol having the following formula:
- wherein R1 and R2 are independently a linear alkylene linkage having 1 to 3 carbon atoms, and R3 and R4 are independently an alkyl group having 1 to 3 carbon atoms, and wherein the weight ratio of the biobased C2-C10 diol to the branched diol is (25-53) to (47-75).
A process of preparing a polyester polyol comprising:
- (a) in a reaction vessel, mixing a biobased C7-C12 dicarboxylic acid, a biobased C2-C10 diol, and a branched diol, and obtaining a mixture;
- (b) heating the mixture at a first temperature in a range of 180° C. to 250° C. for a first duration of time to form a crude product;
- (c) heating the crude product at a second temperature in a range of 100° C. to 150° C. for a second duration of time in a range of 1 to 4 hours to form a second crude product;
- and
- (d) isolating a polyester polyol from the second crude product, wherein the branched diol has the following formula:
- wherein R1 and R2 are independently a linear alkylene linkage having 1 to 3 carbon atoms, and R3 and R4 are independently an alkyl group having 1 to 3 carbon atoms.
Dependencies are inferred from the claim text.