Polyols for Low-VOC Polyurethane Applications
AssigneeStepan Company
InventorsMichael E. O'Brien, Jeffrey R. Janos
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Abstract
Polyester polyols for use in low-VOC polyurethane compositions are disclosed. The polyester polyols are the reaction product of at least one aliphatic polycarboxylic acid, at least one alkoxylated polyalcohol having a functionality of 2.0 or greater, and one or more polyalcohols other than an alkoxylated polyalcohol. The polyester polyols can be formulated into polyurethane compositions to obtain a polyurethane having a low VOC content. The polyurethane composition is particularly suitable for polyurethane coating applications.
Claims21
A polyester polyol comprising the reaction product of:
- (a) a polycarboxylic acid component, or an anhydride, halide, alkyl ester or lactone derivative thereof, comprising
- (i) from 55 mol % to 100 mol %, based on the polycarboxylic acid component, of at least one aliphatic polycarboxylic acid or derivative thereof, and
- (ii) from 0% to 45 mol %, based on the polycarboxylic acid component, of at least one aromatic polycarboxylic acid or derivative thereof;
- (b) at least one alkoxylated polyalcohol having an average functionality of 2.0 or greater;
- and
- (c) at least one polyalcohol other than an alkoxylated polyalcohol,
- wherein the polyester polyol has a functionality of 2.0 or greater, and an OH value of 30 to 800 mg KOH/g.
A polyester polyol blend for preparing a polyurethane composition, the polyester polyol blend comprising:
- a polyester polyol comprising the reaction product of:
- (a) a polycarboxylic acid component, or an anhydride, halide, alkyl ester or lactone derivative thereof, or a combination thereof, comprising
- (i) from 55 mol % to 100 mol %, based on the polycarboxylic acid component, of at least one aliphatic polycarboxylic acid or derivative thereof;
- and
- (ii) from 0% to 45 mol %, based on the polycarboxylic acid component, of at least one aromatic polycarboxylic acid or derivative thereof;
- (b) at least one alkoxylated polyalcohol having an average functionality of 2.0 or greater;
- and
- (c) at least one polyalcohol other than an alkoxylated polyalcohol,
- wherein the polyester polyol has a functionality of 2.0 or greater, and an OH value of 30 to 800 mg KOH/g;
- and
- one or more additional components having two or more active hydrogen groups;
- wherein the polyurethane composition is a coating, adhesive, sealant, elastomer, or foam.
A polyurethane composition comprising:
- (1) a polyester polyol comprising the reaction product of:
- (a) from about 10 mol % to about 70 mol %, based on the total moles of components forming the reaction product, of a polycarboxylic acid component, or an anhydride, halide, alkyl ester or lactone derivative thereof, or a combination thereof, comprising
- (i) from 55 mol % to 100 mol %, based on the polycarboxylic acid component, of at least one aliphatic polycarboxylic acid;
- and
- (ii) from 0% to 45 mol %, based on the polycarboxylic acid component, of at least one aromatic polycarboxylic acid;
- (b) from about 10 mol % to about 70 mol %, based on the total moles of components forming the reaction product, of at least one alkoxylated polyalcohol having an average functionality of 2.0 or greater;
- and
- (c) from about 10 mol % to about 70 mol %, based on the total moles of components forming the reaction product, of at least one polyalcohol other than an alkoxylated polyalcohol,
- wherein the polyester polyol has a functionality of 2.0 or greater, and
- an OH value of 30 to 800 mg KOH/g;
- (2) optionally, one or more additional components having two or more active hydrogen groups;
- and
- (3) at least one isocyanate, polyisocyanate, or a combination thereof.
Dependencies are inferred from the claim text.