Solidifying adhesives having silane cross-linking
A one-component moisture-curing adhesive containing at least one flowable polyoxyalkylene or polyacrylate prepolymer with at least one hydrolyzable silane group, at least one inert additive solid at room temperature selected from hydrocarbon resins, polyesters or polyamides with a softening point of 40 to 150° C., together with auxiliary substances and additives.
1. A one-component moisture-curing solid adhesive containing
a) at least one flowable polyoxyalkylene or polyacrylate prepolymer with at least one hydrolyzable silane group,
b) at least one inert additive solid at room temperature selected from hydrocarbon resins, polyesters or polyamides with a softening point of 40 to 150° C., and
c) auxiliary substances and/or additives, wherein
wherein the adhesive is stable at 23° C., has a viscosity greater than 300 Pa·s at 23° C. and exhibits a viscosity of 5 to 200 Pa·s at 50 to 100° C.
2. The adhesive according to claim 1 , wherein the prepolymer comprises at least two hydrolyzable silane groups.
3. The adhesive according to claim 1 , wherein trialkoxysilane groups or alkyldialkoxysilane groups are present as the hydrolyzable silane groups.
4. The adhesive according to claim 1 , wherein the inert additive solid at room temperature is present in an amount of 0.1 to 20 wt %.
5. The adhesive according to claim 1 , wherein the inert additive solid at room temperature exhibits a softening range of +/−15° C.
6. The adhesive according to claim 1 , wherein the inert additive solid at room temperature is present in finely divided form.
7. The adhesive according to claim 1 , wherein the inert additive solid at room temperature contains no groups reactive with silane groups.
8. The adhesive according to claim 1 , wherein the auxiliary substances and/or additives comprises at least one of catalysts, coupling agents, pigments, stabilizers and plasticizers.
9. The adhesive according to claim 8 , wherein either no plasticizer is present or at least one plasticizer is present which comprises polar groups.
10. The adhesive according to claim 1 , comprising:
5 to 50 wt. % of the at least one prepolymers with at least one hydrolysable silane group,
0.1 to 20 wt. % of the at least one additive solid at room temperature,
0.01 to 25 wt. % of auxiliary substances and/or additives and
further comprising 5 to 65 wt. % of pigments and fillers,
the total being intended to amount to 100 wt %.