A polyurethane adhesive; a method of using it for adhesion;...

C - Chemistry – Metallurgy – 09 – J

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C09J 175/06 (2006.01) C08G 18/42 (2006.01) C09J 167/02 (2006.01)

Patent

CA 2298648

The present invention provides an adhesive comprising a polyester polyol or polyurethane polyol possessing structural units represented by the following general formula (I) within its molecular structure, and an organic polyisocyanate in which the isocyanate groups may be protected: (see formula I) wherein R1 and R2 are the same or different and each represents lower alkyl. The adhesive of the present invention exhibits an excellent initial adhesion strength; and provides adhered objects that exhibit an excellent permanent adhesion strength, hot water resistance, flexibility, flexibility at a low temperature, and fatigue resistance, and is useful in adhering plastic, metal, and the like. In addition, the present invention provides a method of mixing the aforementioned components and using the mixture for adhesion, and a use of the mixture of the aforementioned components.

L'invention concerne un adhésif comprenant un polyol polyester ou un polyol polyuréthanne présentant une unité structurelle représentée par la formule générale (I) dans la molécule (formule dans laquelle R<1> et R<2> sont identiques ou différents et représentent chacun un alkyle inférieur) et un polyisocyanate organique dans lequel les groupes isocyanate ont été facultativement protégés. L'adhésif présente une excellente force d'adhérence initiale, il permet d'obtenir des articles collés présentant d'excellentes caractéristiques de force d'adhérence permanente, de résistance à l'eau chaude, de flexibilité, de flexibilité à basse température, de résistance à la fatigue, etc., et il est utile pour coller des plastiques, des métaux, etc. L'invention concerne également un procédé d'utilisation des ingrédients pour le collage et l'utilisation d'un mélange des ingrédients.

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