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US 2023/0141110 A1Published application
Preparation of polyurethane and polyisocyanurate foams using liquid siloxane nucleating additive
OwnerWeijun Zhou, Thomas Mosciattiinventors
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Abstract
A method for preparing polyisocyanurate and polyurethane foams by the use of a liquid siloxane nucleating additive, and a foam-forming composition for preparing foams with improved thermal insulation performance, comprising an isocyanate component, an isocyanate-reactive component, a blowing agent, and a liquid siloxane nucleating additive.
Claims10
A foam-forming composition for preparing polyisocyanurate and polyurethane foams, comprising:
- at least one polyisocyanate compound;
- at least one isocyanate-reactive compound;
- at least one blowing agent;
- at least one liquid siloxane nucleating additive;
- wherein, the at least one liquid siloxane nucleating additive is soluble in the at least one blowing agent;
- and, the at least one liquid siloxane nucleating additive is of the following structure:
- wherein, R1 can be a C1 to C4 alkyl group or a tri(methyl) siloxy group, and R2 can be a C5 to C18 alkyl group, a C5 to C18 cycloalkyl group, or a C7 to C18 arylalkyl group.
4 more elements
Dependencies are inferred from the claim text.