C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
C09J 167/02 (2006.01) B32B 7/12 (2006.01) C08J 5/12 (2006.01) D04H 13/00 (2006.01)
Patent
CA 2312757
The invention relates to an adhesive containing components A and B, whereby an amorphous polyester with a molecular weight (M n) of at least 8,000 and a enthalpy of melting no higher than 20 mJ/mg is contained as component A, and an amorphous polyester with a molecular weight (M n) of less than 8,000, especially 1,000 to 6,500, and having a glass transition temperature of no higher than 60 °C, especially of -10 to 40 °C, is contained as component B. The adhesive has a melting viscosity of 500 to 25,000 mPas (Brookfield RVT DVII, 90 °C, Spindel 27) and a softening point of 70 to 100 °C (ASTM E28). The inventive adhesive is especially well suited for bonding polyolefin substrates.
La présente invention concerne un adhésif comportant les composants A et B. Le composant A est un polyester amorphe d'un poids moléculaire (Mn) d'au moins 8,000 et présentant une anthalpie de fusion d'au maximum 20 mJ/mg. Le composant B est un polyester amorphe d'un poids moléculaire (Mn) inférieur à 8,000, en particulier, de 1,000 à 6,500, et présentant une température de transition vitreuse d'au maximum 60 DEG C, en particulier de - 10 à 40 DEG C. Cet adhésif présente une viscosité à l'état fondu de 500 à 25,000 mPas (Brookfield - RVT DVII, 90 DEG C, broche 27) et un point de ramollissement de 70 à 100 DEG C (ASTM E28). L'adhésif selon l'invention convient particulièrement pour le collage de substrats polyoléfiniques.
Eisenberger Heike
Ferencz Andreas
Fischer Herbert
Taal Eduard Franciscus
Henkel Ag & Co. Kgaa
Henkel Kommanditgesellschaft Auf Atkien
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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