Moisture-setting polyurethane adhesive for hygiene articles

Details Moisture-setting polyurethane adhesive for hygiene articles Moisture-setting polyurethane adhesive for hygiene articles

C - Chemistry, Metallurgy

08

G

C08G 18/10 (2006.01) B32B 7/12 (2006.01) C08G 18/12 (2006.01) C09J 175/04 (2006.01) C09J 175/06 (2006.01)

Patent

CA 2315881

The invention concerns a moisture-setting polyurethane adhesive comprising: (a) 70 to 95 wt.% of a polyurethane prepolymer obtained by polyadditon of polyols with diisocyanates trimerised into isocyanates; and (b) 5 to 30 wt.% of a substantially amorphous polyalphaolefin, the content in free NCO groups representing 1 to 20 wt.% of the adhesive. Said adhesive is used for bonding VELCRO? type fixing elements on hygiene articles.

L'invention se rapporte à un adhésif polyuréthane réticulable par l'humidité qui comprend: a) 70 à 95 % en poids d'un prépolymère polyuréthane obtenu par polyaddition de polyols avec des diisocyanates trimérisés en isocyanurates; et b) 5 à 30 % en poids d'une polyalphaoléfine essentiellement amorphe, la teneur en groupes NCO libres représentant 1 à 20 % en poids de l'adhésif. L'adhésif selon l'invention est utilisé pour le collage des éléments de fixation du type VELCRO* sur des articles destinés à l'hygiène.

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