Polyurethanes and moisture curable compositions including the same
AssigneeH.B. Fuller Company
InventorsBrian W. Carlson, Justin Kaffenberger, Alan R. Nahkala
Life of this patent
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Abstract
Polyurethanes and hot melt moisture curable adhesive compositions that include the same are disclosed. The polyurethane includes the reaction product of diisocyanate and a semi-crystalline polyester polyol having an acid number of less than 4 and including the reaction product of a saturated fatty component having a hydroxyl number less than 2, the saturated fatty component being selected from the group consisting of saturated fatty acid, saturated fatty acid ester, saturated oil, and combinations thereof, a polyhydric alcohol that includes at least three hydroxyl groups, and a dibasic acid.
Claims24
A polyurethane prepolymer comprising the reaction product of
- diisocyanate, and
- a semi-crystalline polyester polyol having an acid number of less than 4 and being solid at room temperature, the semi-crystalline polyester polyol comprising the reaction product of
- a saturated fatty component having a hydroxyl number less than 2 mg KOH/g, the saturated fatty component being selected from the group consisting of saturated fatty acid, saturated fatty acid ester, saturated oil, and combinations thereof,
- a polyhydric alcohol comprising at least three hydroxyl groups, and
- a dibasic acid,
- the polyurethane prepolymer being isocyanate-terminated.
A hot melt moisture curable adhesive composition comprising:
- a polyurethane prepolymer comprising the reaction product of diisocyanate, and
- a semi-crystalline polyester polyol having an acid number of less than 4 and being solid at room temperature, the semi-crystalline polyester polyol comprising the reaction product of
- a saturated fatty component having a hydroxyl number less than 2 mg KOH/g, the saturated fatty component being selected from the group consisting of saturated fatty acid, saturated fatty acid ester, saturated oil, and combinations thereof,
- a polyhydric alcohol comprising at least three hydroxyl groups, and
- a dibasic acid.
Dependencies are inferred from the claim text.