SU1643577A1 - Method of producing silicate paint - Google Patents

Abstract

The invention relates to the production technology of silicate paints used for protective and decorative coatings in industrial and civil construction. The invention allows the shelf life of silicate paints to be increased to 3 years or more, and the original level of paint properties is maintained during this period. For this, the paint obtained by mixing potassium liquid glass with the dry pigment part is additionally subjected to partial dehydration under isothermal conditions at 40-110 ° C to a residual moisture content of 5-15%. 2 tab.

Description

The invention relates to the production technology of silicate paints used for protective and decorative coatings in industrial and civil construction.

The aim of the invention is to increase the shelf life of the ink.

Example 1. The paint is prepared as follows. K 60.2 mach. potassium liquid glass with a molar ratio of SiOjlKgO of 3.4; 1 is added 22.3 wt.h. titanium oxide, 2.3 wt. chromium oxide and 15.2 mash.h. talcum powder The resulting composition is thoroughly mixed and dispersed in a bisonic mill before passing through the sieve with 900 holes per 1 cm2.

Thereafter, the initial level of paint properties is determined.

The resulting paint is divided into two parts for comparative durability tests, i.e. on

the ability to retain its properties during long-term storage and transportation.

One part is a ready-to-use paint (a known method), and the second part is subjected to a dehydration process in a dryer of a suspended layer on an inert carrier layer. Drying the paint into the dryer is carried out with a laboratory water pump. The process of paint dehydration is carried out at 40-110 ° C to a residual moisture content of 5-15%.

The resulting air-dry powder and part of the original paint are stored in an unheated room under conditions of alternating thawing and freezing for 3 years.

Before using the paint obtained by the proposed method, is subjected to rehydration (water treatment) at 20-80 ° C. The amount of water is adjusted within the dehydrated

WITH/

with

but

J

Sl

Color: water 1: t, 5-2 to obtain the desired low viscosity.

Parameters of the method and the properties of the pan are given in table. one.

PRI mme R 2. According to the known and proposed methods, as in example 1, silicate paints of composition 1 are used, wt.h .:

Chalk 250

Zinc white 85

Talc 85

Pigment

(CrgOe) 80

Potassium

liquid

glass 500

In addition to TOGO, paint of composition 2 was prepared, mac:

Ground chalk 40

Zinc white 20

Talc 15

The granulated shpak 25 Potassium liquid

glass 120 The resulting dyes are subjected to a 10-fold freeze-thaw cycle in the climate chamber. The results of the test paints are presented in Table 2.

Formula of invention

A method of preparing silicate dye, comprising mixing potassium liquid glass with a dry pigment part, characterized in that, in order to increase the shelf life

The paints, the mixture of potassium water glass and the dry pigment part are additionally subjected to partial dehydration under isothermal conditions at 40–110 ° C to a residual moisture content of 515 wt.

The initial level of properties of paint Paint prepared by a known method: after 1 year after 3 years Paint prepared by the proposed method: after 1 year

after 3 years

For comparison

18-20 87-90

84-87

25-30 75-80 70-75 3 The paint hardened and lost its technical properties.

40 70

110 40 70

110 30

15 13

five

15 13

5 25

18-20 18-20 18-20 18-20 18-20 18-20

87-90 87-90 87-90 87-90 87-90 87-90

84-87 84-87 84-87 84-87 84-87 84-87

3

During storage in a sealed container for 2 days, the resulting powder adheres.

120

Table 1

18-20 87-90

84-87

84-87 84-87 84-87 84-87 84-87 84-87

3

and in sealed days received by

to not subject to ation

80-85

80-85 8Ь-90

85-90

table 2

0-5

80-85 5-8

85-90

0-3

70-75 0-5

80-85

Claims (1)

15 A method of preparing silicate paint, comprising mixing potassium water glass with a dry pigment part, characterized in that, in order to increase the shelf life of 2 paints, a mixture of potassium water glass and a dry pigment part is further subjected to partial dehydration under isothermal conditions at 40- 110 ° C to a residual moisture content of 525 15 wt.% '.