Solvent-free moisture-curable hot melt urethane resin composition
First Claim
1. A solvent-free moisture-curable hot melt urethane resin composition comprising an isocyanate group-containing hot melt urethane prepolymer (A), a morpholine ether-based crosslinking catalyst (B), and at least one sulfur atom-containing organic acid (C) selected from the group consisting of sulfonic acids and sulfinic acids as essential components.
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Abstract
An isocyanate group-containing hot melt urethane prepolymer, a morpholine ether-based crosslinking catalyst, and at least one sulfur atom-containing organic acid selected from the group consisting of sulfonic acids and sulfinic acids are used as essential components. The urethane prepolymer is a compound having an isocyanate group capable of reacting with moisture in the air or a substrate to be coated to form a crosslinked structure in the molecule. The morpholine ether-based crosslinking catalyst contributes to the moisture-crosslinking reactivity at room temperature. The sulfur atom-containing organic acid contributes to an improvement in thermal stability during melting.
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Citations
4 Claims
- 1. A solvent-free moisture-curable hot melt urethane resin composition comprising an isocyanate group-containing hot melt urethane prepolymer (A), a morpholine ether-based crosslinking catalyst (B), and at least one sulfur atom-containing organic acid (C) selected from the group consisting of sulfonic acids and sulfinic acids as essential components.
Specification