Consolidating agent and use thereof for the production of hydrolysis-stable molded members and coatings
AssigneeLeibniz-Institut fuer Neue Materialien gemeinnuetzige GmbH
InventorsKlaus Endres, Bernd Reinhard, Helmut Schmidt
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Abstract
Described is a consolidant comprising a hydrolyzate or precondensate of at least one organosilane and at least one metal compound, where the molar ratio of silicon compounds to metal compounds is in the range of from 10 000:1 to 10:1. The consolidant can be used for the hydrolysis-stable consolidation of porous or particulate materials to form moldings. The consolidant can be used for the hydrolysis-stable coating of substrates.
Claims19
A process for producing a hydrolysis-stable molded article, wherein the process comprises mixing a pre-formed consolidant with at least one of a porous material and a particulate material and curing the consolidant, wherein the consolidant is particle-free and comprises at least one of a hydrolyzate and a precondensate of
- (a) at least one organosilane of formula
- RnSiX4-n (I)
- wherein the radicals R are the same or different and represent groups which are not removable by hydrolysis, the radicals X are the same or different and represent hydroxy groups and groups which are removable by hydrolysis, and n is 1, 2 or 3;
- (b) at least one hydrolysable silane of formula
- SiX4 (II)
- wherein the radicals X are as defined above;
- and
- (c) at least one metal compound of formula
- MXa (III)
- wherein M represents a metal of main groups I to VIII or of transition groups II to VIII of the Periodic System of Elements, including boron, X is as defined above in formula (I), with the proviso that two radicals X may be replaced by one oxo group, and a corresponds to a valency of the metal M;
- and wherein a molar ratio of compounds of formulae (I) and (II) to compound(s) of formula (III) is from 10,000:1 to 10:1.
A process for the production of a hydrolysis-stable coating, wherein the process comprises applying to a substrate a coating material and curing the coating material at a temperature of at least 40° C. and a pressure of at least 5 bar, the coating material being particle-free and comprising at least one of a hydrolyzate and a precondensate of
- (a) at least one organosilane of formula
- RnSiX4-n (I)
- wherein the radicals R are the same or different and represent groups which are not removable by hydrolysis, the radicals X are the same or different and represent hydroxy groups and groups which are removable by hydrolysis, and n is 1, 2 or 3;
- (b) at least one hydrolysable silane of formula
- SiX4 (II)
- wherein the radicals X are as defined above;
- and
- (c) at least one metal compound of formula
- MXa (III)
- wherein M represents a metal of main groups I to VIII or of transition groups II to VIII of the Periodic System of Elements, including boron, X is as defined above in formula (I), with the proviso that two radicals X may be replaced by one oxo group, and a corresponds to a valency of the metal M;
- a molar ratio of compounds of formulae (I) and (II) to compound(s) of formula (III) being from 10,000:1 to 10:1.
Dependencies are inferred from the claim text.