Silane-containing binder for composite materials

摘要

The present invention relates to a binder for composite materials comprising cellulose- or lignocellulose-containing materials, which is based on the components (i) at least one binder from the series consisting of organic resins, isocyanates, natural or near-natural binders and (ii) at least one composition based on an aminoalkylsilane. The invention furthermore relates to a composite material which is at least based on a cellulose- or lignocellulose-containing material and the abovementioned binder, a process for the production of such a composite material and the use of the binder system according to the invention for the production of wood-based materials.

主权项

1. A binder for a composite material comprising cellulose- or lignocellulose-containing material, the binder comprising an aqueous solution of:
(i) 5-50% by weight of a natural binder selected from the group consisting of a wheat protein, a tannin, and potato pulp, and (ii) 0.1 to 10% by weight of a substantially alcohol-free hydrolysis product of a cocondensate consisting of one or more aminoalkylsilanes of formula (I)
R1 R2N(CHR4)aSi(R3)r(OR)3-r  (I),wherein
R1 and R2 are each independently H or an optionally substituted linear, branched or cyclic C1- to C20-alkyl group or an aryl group or an aminocarbyl group, R3 is H or a linear or branched C1-C8-alkyl group, groups R4 are each independently H or methyl, a is from 1 to 10, groups R are each independently a linear or branched C1- to C8-alkyl group, and r is 0 or 1 or 2,wherein
the amino functions are neutralized with from 0.9 to 3.6 mol of HCOOH or H3CCOOH per mole of amino group, and a content of (i) and (ii) in the aqueous binder solution is from 1 to 80% by weight.