Adhesive composition
The present invention is in the field of an improved adhesive composition, use of said composition and products comprising said composition. The adhesive composition may be a one component and a two component adhesive, each component typically comprising various ingredients. The present adhesives are water-based dispersions.
1. Aqueous adhesive composition comprising
(a1) 40-97 wt. % of a dispersion, comprising one or more of polychloroprene dispersion, polyurethane dispersion, natural rubber dispersion, styrene-butadiene-styrene copolymer dispersion, nitrile-butadiene rubber, polyvinyl butyral dispersion, styrene-butadiene rubber dispersion, and combinations thereof, the dispersion comprising 30-80 wt. % solids,
(a2) 2-50 wt. % plasticizer, wherein the plasticizer is selected from mono-esters from benzoic acid and a C 4 -C 16 alcohol, and combinations thereof,
(a3) 0.0-5 wt. % surfactant,
(a8) 0.1-40 wt. % pH stabilizer,
(a9) 0.1-2 wt. % of one or more of a fungicide, a bactericide, and an algaecide, and preferably at least one of
(a5) 0.1-40 wt. % of a resin dispersion, the resin dispersion comprising 30-70 wt. % solids,
(a6) 0.1-8 wt. % of an acid binder,
(a7) 0.1-15 wt. % thickener,
(a10) 0.001-1 wt. % defoamer,
(a11) 0.001-1 wt. % emulsifier,
(a12) 0.001-1 wt. % wetting agent
(a13) 0.1-2 wt. % of a colorant, and
(a14) 0.1-3 wt. % of anti-degradant,
(a4) the remainder being water,
wherein all parts are calculated based on the total weight of the composition.
2. Adhesive composition according to claim 1 , further wherein the alcohol is selected from single branch alcohols, branched alcohols, primary alcohols, secondary alcohols, tertiary alcohols, substituted alcohols, and combinations thereof.
3. Adhesive composition according to claim 1 , wherein the alcohol is a C 9 -C 11 alcohol.
4. Adhesive composition according to claim 1 , wherein the dispersion (a1) comprises 16-97 wt. % polychloroprene dispersion.
5. Adhesive composition according to claim 1 , wherein a dynamic viscosity is 20-25000 mPa*s (according to ISO 2555).
6. Adhesive composition according to claim 1 , wherein a pH is 7-13.5.
7. Adhesive composition according to claim 1 , wherein a glass transition temperature is 193-223K (−80 to −50° C.) (according to ISO 22768).
8. Adhesive composition according to claim 1 , wherein (a6) the acid binder is one or more of a basic metal salt.
9. Adhesive composition according to claim 1 , wherein (a7) the thickener is one or more of a gum.
10. Product comprising an adhesive composition according to claim 1 .