Reactive hot-melt adhesive composition containing polyester-polyurethane
A hot-melt adhesive, polyester polyurethane technology, applied in the direction of polyurea/polyurethane adhesive, adhesive type, adhesive, etc., can solve the problem of reformulation, etc.
Inactive Publication Date: 2019-11-15
LUBRIZOL ADVANCED MATERIALS INC
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- Application Information
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Problems solved by technology
However, it is not desirable to reformulate the entire hot melt adhesive composition or its components for a different application
Method used
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[0040] Exemplary polyester-polyurethane intermediates according to Examples 1 to 9 as shown in Table 1.
[0041] Table 1
[0042]
[0043] A reactive hot melt adhesive composition was prepared using the following standard reaction mixture: crystalline polyester: 29%, solid amorphous polyester: 40%, liquid amorphous polyester: 20%, polyisocyanate: 11%. Combine the components so that the NCO:OH ratio is 2.2:1. In Comparative Examples A and B, the standard crystalline polyester polyols shown in Table 1 were used in the reaction mixture. In Examples 1 to 9, the polyester-polyurethane intermediate of the present invention was used in place of the crystalline polyester.
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Abstract
A reactive hot-melt adhesive composition is provided which is the product of a reaction mixture comprising a polyester-polyurethane intermediate, optionally crystalline and / or amorphous polyesters orpolyethers, and an excess of isocyanate groups. The inclusion of the polyester-polyurethane intermediate in the reactive hot-melt adhesive composition allows the properties of the adhesive compositionto be customized for various applications.
Description
technical field [0001] The disclosed technology relates to reactive hot melt adhesive compositions containing polyester-polyurethane intermediate materials. The inclusion of a polyester-polyurethane material allows tailoring of the properties of the reactive hot melt adhesive composition. Background technique [0002] Reactive hot melt adhesives (rHMA) are also known as "moisture curing hot melt adhesives". These binder materials are generally solid at room temperature. After application and melting, they bond in solid form to the material not only by cooling and curing, but also by chemical reaction of free isocyanate groups with ambient moisture. Moisture-curable reactive hot melt adhesives typically comprise (i) a crystalline polyester component, (ii) an amorphous polyester or polyether component (liquid or solid or mixtures thereof), and (iii) an isocyanate component , wherein the isocyanate is present in an amount sufficient to provide a molar excess of NCO / OH groups...
Claims
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IPC IPC(8): C08G18/73C08G18/76C08G18/10C08G18/12C08G18/42C09J175/06
CPCC08G18/73C08G18/7671C08G18/10C08G18/12C08G18/4238C08G18/4277C09J175/06C08G2170/20C08G18/70C08G18/307C08G18/755C08G2250/00C09J2203/00
Inventor G·洛温伯格B·M·加里斯特阿米龙D·萨瓦特拉雷德莱撒J·塞斯索拉诺
Owner LUBRIZOL ADVANCED MATERIALS INC