一种蓖麻油改性的耐热型聚碳酸酯型水性聚氨酯胶粘剂及其制备方法

Castor oil modified heatproof polycarbonate waterborne polyurethane adhesive and preparation method thereof

Abstract

The invention discloses a castor oil modified heatproof polycarbonate waterborne polyurethane adhesive and a preparation method thereof. The adhesive is prepared from, by weight, 100 parts of polycarbonate polyalcohol, 16-18 parts of hydrophilic monomers, 15-25 parts of castor oil, 20-45 parts of diisocyanate, 0.1-1 part of stannous octoate catalysts, 10-25 parts of organic solvents, 1-10 parts of micromolecular chain extender, 10-20 parts of alkaline solution and 1-5 parts of antioxidants. The method includes preparation steps: performing reaction of polycarbonate polyalcohol, hydrophilic monomers, castor oil, diisocyanate and the like to generate isocyanate-terminated hydrophilic prepolymer; performing chain extension, neutralization, dispersion, emulsion and addition of antioxidants to obtain the castor oil modified heatproof polycarbonate waterborne polyurethane adhesive. The castor oil modified heatproof polycarbonate waterborne polyurethane adhesive has advantages of high water resistance and heat resistance and great adhesiveness and easiness in coating for various materials.
本发明公开一种蓖麻油改性的耐热型水性聚氨酯胶粘剂及其制备方法,由以下重量份的各组分组成:聚碳酸酯多元醇100份,亲水单体16~18份,蓖麻油15~25份,二异氰酸酯20~45份,辛酸亚锡催化剂0.1~1份,有机溶剂10~25份,小分子扩链剂1~10份,碱性溶液10~20份,抗氧化剂1~5份;制备步骤为:用聚碳酸酯多元醇、亲水性单体、蓖麻油、二异氰酸酯等反应,生成异氰酸酯端基的亲水性预聚体;再经扩链、中和、分散乳化,最后加入抗氧化剂,即得到蓖麻油改性的耐热型水性聚氨酯胶粘剂。其具有耐水性好、耐热性好、对各种材料具有良好的粘结性和易于涂覆的特性。

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