MOISTURE-CURED HOT-MELT ADHESIVES HAVING AT LEAST ONE SILANE GROUP-CONTAINING POLYURETHANE PREPOLYMER Russian patent published in 2013 - IPC C08G18/28 C09J175/04 C08L75/04 

Abstract RU 2482136 C2

FIELD: chemistry.

SUBSTANCE: invention relates to moisture-cured hot-melt adhesives. Disclosed is a moisture-cured hot-melt adhesive composition containing at least one silane group-containing polyurethane prepolymer of formula (I), where R1 is an n-valent organic radical of prepolymer P, which is obtained from at least one polyol and at least one polyisocyanate and has at least n isocyanate groups, followed by removal of the n isocyanate groups; R2 is a C1-C10 alkyl group; R3 is a linear or branched C1-C10 alkylene group; X is a hydrolysable radical OR4, wherein R4 is a C1-C10 alkyl group which can contain 1 or 2 oxygen atoms of an ether; a equals 0, 1 or 2; n equals 2 or more; where the prepolymer of formula (I) is obtained from reaction of the polyurethane prepolymer P with a mercaptosilane of formula (II), wherein the prepolymer P is solid at room temperature and does not have an additional silane group, and the composition has longer storage life (viscosity stability) in uncured form. Disclosed also is a method for adhesive binding of substrates using the disclosed adhesive composition and an article obtained using the adhesive.

EFFECT: disclosed adhesive compositions do not form bubbles neither when heated nor during curing and have stable viscosity at high temperatures.

20 cl, 7 tbl

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RU 2 482 136 C2

Authors

Rozenau Sven

Pashkovski Kaj

Burkkhardt Urs

Dates

2013-05-20Published

2006-12-22Filed