Quick-curing water resistant silica-alkali metal coatings and processes therefor

Claim 2

A LIQUID COMPOSITION ESPECIALLY WELL ADAPTED TO FUNCTION AS A VECHILE FROM WHICH ESPECIALY FAST-CURING WATER-RESISTANT COATING CAN BE OBTAINED COMPRISING IN COMBINATION: 1. 10 TO 45 PERCENT BY WEIGHT OF SOLIDS COMPRISING: A. FROM ABOUT 10 TO 60 WEIGHT PERCENT SOLIDS OF FUGATIVE NH4+ ION STABILIZED COLLODIAL SILICA BASED ON TOTAL SILICA SOLIDS IN SAID COMPOSITION: B. THE 90 TO 40 WEIGHT PERCENT BALANCE OF SILICA SOLIDS COMPRISING SILICA OR SILICATE CONTAINING MATERIALS: SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF:

Claim 3

ORGANIC QUATERNARY AMMONIUM SILICATES:

Claim 4

ORGANIC QUATERNARY AMMONIUM SILICATES:

Claim 5

ALKALI STABILIZED COLLODIAL SILICATES:

Claim 6

ALKALI STABILIZED COLLODIAL SILICATES:

Claim 7

Alkali stabilized colloidal silicates;

Claim 8

Alkali stabilized colloidal silicates;

Claim 9

A relatively long shelf life composition capable of curing to water resistant coatings within two hours of application as a film comprising in combination: I. 50 to 90 weight percent metallic dust capable of entering into an SiO2 polymerization; II. 10 to 50 weight percent of the composition of claim 1.

Claim 10

The composition of claim 2 wherein said metallic dust is zinc.

Claim 11

Alkali metal silicates selected from the group consisting of: a. potassium silicates b. lithium silicates c. sodium-lithium silicates and;

Claim 12

Alkali metal silicates selected from the group consisting of: a. potassium silicates b. lithium silicates c. sodium-lithium silicates and;

Claim 13

ALKALI METAL SILICATES SELECTED FROM THE GROUP CONSISTING OF: A. POTASSIUM SILICATES B. LITHIUM SILICATES C. SODIUM-LITHIUM SILICATES AND:

Claim 14

ALKALI METAL SILICATES SELECTED FROM THE GROUP CONSISTING OF: A. POTASSIUM SILICATES B. LITHIUM SILICATES C. SODIUM-LITHIUM SILICATES AND:

Claim 15

MIXTURES OF THE FOREGOING II. 90 TO 55 WEIGHT PERCENT OF WATER.

Claim 16

MIXTURES OF THE FOREGOING II. 90 TO 55 WEIGHT PERCENT OF WATER.

Claim 17

Mixtures of the foregoing II. 90 to 55 weight percent of water.

Claim 18

Mixtures of the foregoing II. 90 to 55 weight percent of water.

Claim 19

The composition of claim 2 wherein said metallic dust is aluminum.

Claim 20

The composition of claim 2 wherein pigments are also included.

Claim 21

The composition of claim 2 wherein the particle size of said dust is from about 5 to 15 microns.

Claim 22

A thin dry water-resistant film formed from a thin wet supported film, having a thickness of 6 to 10 mils, of the composition of claim 2.

Claim 23

The composition of claim 1 wherein said 90 to 40 weight percent solids component is an organic quaternary ammonium silicate.

Claim 24

The composition of claim 1 wherein said 90 to 40 weight percent solids component is an alkali stabilized colloidal silica.

Claim 25

The composition of claim 1 wherein said 90 to 40 weight percent solids component is a potassium silicate.

Claim 26

The composition of claim 1 wherein said 90 to 40 weight percent component is a lithium silicate.

Claim 27

The composition of claim 1 wherein said 90 to 40 weight percent solids component is a sodium-lithium silicate.

Claim 28

The composition of claim 1 wherein said 90 to 40 weight percent solids component is a sodium -lithium silicate and wherein said metallic dust is zinc.

Claim 29

A thin dry water-resistant film formed from a thin wet supported film having a thickness of 6 to 10 mils of the composition of claim 2, wherein said 90 to 40 weight percent solids component is a sodium-lithium silicate and said metallic dust is zinc.

Claim 30

A process for the formation of thin dry water-resistant protective films from wet films within two hours of wet film formation which comprises in combination: A. Preparation of the silicate or colloidal silica solids in aqueous carrier fugative ion stabilized vehicle of claim 1 B. Blending said vehicle with 9 to 50 weight percent of metallic dust to form the composition of claim 2; C. Applying said claim 2 composition to an appropriate substrate to form said wet film, drying under ambient conditions to permit the rapid removal of said fugative ion from said film and thereby effecting a rapid reduction in the pH of the coating and a concomitant rapid formation of a crosslinked water-resistant film and wherein said ambient conditions include the normal amount of CO2 in the air which tends to neutralize remaining non-fugative alkaline components in the film.

Claim 31

The process of claim 15 wherein said metallic dust is zinc.

Claim 32

The process of claim 15 wherein said metallic dust is aluminum.

Claim 33

The process of claim 15 wherein said 90 to 40 weight percent solids component is a lithium silicate or a sodium-lithium silicate, said metallic dust is zinc and said fugative ion is (NH4)+.