Bioresin composition for use in forming a rigid polyurethane foam article
AssigneeBASF SE
InventorsChristopher M. Tanguay, Patrick J. Watters, John P. Erickson, Eric W. Banks
Life of this patent
Estimating the term…
Abstract
A bioresin composition is used to form a rigid polyurethane article that includes a first and a second biopolyol and is substantially free of aprotic solvents that chemically decompose in the presence of water. The first biopolyol includes a natural oil component. The second biopolyol includes the reaction product of a natural carbohydrate and an alkylene oxide. The rigid polyurethane foam article includes the reaction product of the bioresin composition and an isocyanate which are reacted in the presence of a chemical blowing agent.
Claims18
A rigid polyurethane foam article comprising the reaction product of:
- (A) a bioresin composition substantially free of aprotic solvents that chemically decompose in the presence of water, said bioresin composition comprising:
- (i) a first biopolyol comprising a natural oil component, said first biopolyol having:
- (a) a nominal functionality of at least 2.5,
- (b) a hydroxyl number of from about 375 to about 575 mg KOH/g, and
- (c) a viscosity of from about 500 cps to about 1500 cps at 77° F.,
- (ii) a second biopolyol comprising the reaction product of a natural carbohydrate and an alkylene oxide,
- wherein said second biopolyol and said first biopolyol are present in a weight ratio of greater than 1:1 to about 3:1, and
- (iii) an aprotic solvent that does not chemically decompose in the presence of water;
- and
- (B) an isocyanate;
- in the presence of
- (C) a chemical blowing agent.
Dependencies are inferred from the claim text.