Abstract: A polyurethane sealant is provided that includes a fatty acid ester that is used to replace volatile solvent in the sealant formulation and a reaction product of polyoxyalkylene polyol and polyisocyanate. The polyurethane sealant produced has a non-volatile materials content of at least 96%. In addition to reducing the volatile organic compounds (voc) content and maintaining the attributes of a sealant, the use of fatty acid esters provides the sealant with superior material extrusion, improved gunning and tooling, and improved package stability. Also provided is a method for making a polyurethane sealant where the polyisocyanate component the polyol component are combined to form a reaction product, and the reaction product is combined with the fatty acid ester component, wherein the polyurethane sealant has a non-volatile materials content of at least 96%.

Abstract: A polyurethane sealant is provided that includes a fatty acid ester that is used to replace volatile solvent in the sealant formulation and a reaction product of polyoxyalkylene polyol and polyisocyanate. The polyurethane sealant produced has a non-volatile materials content of at least 96%. In addition to reducing the volatile organic compounds (voc) content and maintaining the attributes of a sealant, the use of fatty acid esters provides the sealant with superior material extrusion, improved gunning and tooling, and improved package stability. Also provided is a method for making a polyurethane sealant where the polyisocyanate component the polyol component are combined to form a reaction product, and the reaction product is combined with the fatty acid ester component, wherein the polyurethane sealant has a non-volatile materials content of at least 96%.