Semi-crystalline two-part polyurethane adhesives from amorphous components
AssigneeLord Corporation
InventorsTimothy D. Fornes, Kraig L Turner
Life of this patent
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Abstract
Reaction-induced crystallizable two-part polyurethane adhesive compositions formed from amorphous constituents. The two-part adhesive compositions can include a polyol resin comprising at least two functional groups, a mono-functional resin containing one functional group; and an isocyanate resin comprising at least two functional groups Methods of forming adhesive compositions are provided. Applications of such adhesive compositions are provided.
Claims23
A reaction-induced crystallizable two-part polyurethane adhesive composition formed from amorphous constituents comprising:
- a polyol resin comprising at least two functional groups;
- a mono-functional resin containing one functional group, wherein the one functional group is a hydroxyl or amine terminal moiety and wherein the mono-functional resin comprises an alkyl group comprising a length of at least eight carbon atoms or wherein the mono-functional resin is 2-phenoxy alcohol;
- an aliphatic isocyanate resin comprising at least two isocyanate groups, and
- a thermally conductive filler that is treated with material capable of co-crystallizing with the composition,
- wherein the polyol resin is included in a first component and the isocyanate resin is included in a second component, and wherein the mono-functional resin is contained in one or both of the first and second components such that the first and second components are configured to be mixed to react with each other and the mono-functional resin.
A method of forming a reaction-induced crystallizable two-part polyurethane adhesive composition, the method comprising:
- combining a first component and second component at a room temperature, wherein the first component comprises a polyol resin comprising at least two functional groups and a thermally conductive filler that is treated with material capable of co-crystallizing with the composition, wherein the second component comprises an aliphatic isocyanate resin comprising at least two isocyanate groups, and wherein one or both of the first and second components further comprise a mono-functional resin containing one functional group, wherein the one functional group is a hydroxyl or amine terminal moiety and wherein the mono-functional resin further comprises an alkyl group comprising a length of at least eight carbon atoms or wherein the mono-functional resin is 2-phenoxy alcohol;
- and
- reacting the first component and the second component to cause the composition to crystallize.
A reaction-induced crystallizable two-part adhesive composition formed from amorphous constituents comprising:
- a polyol;
- a mono-functional additive containing one reactive functional group, wherein the mono-functional additive is selected from 2-phenoxy alcohol and an alkyl monol comprising an alkyl group comprising at least 6 carbons;
- an aliphatic isocyanate resin comprising at least two isocyanate groups, and
- a thermally conductive filler that is treated with material capable of co-crystallizing with the composition,
- wherein the polyol resin and the mono-function additive are included in a first component and the aliphatic isocyanate resin is included in a second component, wherein the first and second components are configured to be mixed to react with each other;
- and wherein the first and second components are free of an isocyanate prepolymer.
Dependencies are inferred from the claim text.