Solution comprising propyl-functional alkali siliconates, silicates and method of production thereof

摘要

The invention relates to a solution and to methods for producing the solution comprising propylfunctional alkaline siliconates, silicates and, optionally, the cocondensation products thereof.

主权项

1. A method of preparing an alcohol-free solution comprising a propyl-functional alkali siliconate, a silicate and optionally a co-condensation product of a propyl-functional alkali siliconate with a silicate, the method comprising:
1) preparing a mixture comprising a propyl-functional silane, a halosilane, and an alcohol by reacting the propyl-functional silane, halosilane, alcohol, and optionally water 2) introducing the mixture in the presence of inert gas into an aqueous alkaline hydroxide solution, wherein the inert gas is supplied so that the mixture is metered directly into the aqueous alkaline hydroxide solution, and 3) removing alcohol and/or hydrolysis alcohol, wherein the propyl-functional silane is represented by the formula I:
(R1)xSiHal(y-x)  (I), wherein R1 is independently a propyl-functional residue; hydrolysable residue Hal is independently chlorine or bromine; x is 1 or 2; and y is 4, and the halosilane is represented by the formula II:
Si(Hal)4  (II), wherein hydrolysable residue Hal is independently chlorine or bromine.