SU963971A1 - Composition for coating construction products - Google Patents

Description

The invention relates to building materials and can be used for a protective and finishing coating on cement-free, silicate and stone surfaces. Known composition for coating building products, including man, May.%: Soluble potassium glass 60-80 Dicalcium silicate 1-10 Mica hammer 12-20 Kaolin 1-8 Aerosil 2-6 1. The closest to the proposed composition of the technical essence of the achieved result is position for coating construction materials of composition, Mac.% s Liquid potassium glass 25-30 Dolomite flour sawing waste dolomite rock 5-10 Pigment Else However, coatings obtained from known compositions are characterized by insufficient abrasion resistance and m resistance to weathering. The purpose of the invention is to increase the abrasion resistance and frost resistance of the coating. This is achieved by the fact that the composition for pokrlti building products, including liquid potassium glass, dolomite flour, talc, pigment and water, contains additionally dolomite flour, thermally activated, with the following ratio of components wt.%: Liquid potassium glass .25-35 Dolomite flour 15-22 Talc3-8 Pigment5-10 Dolomitic flour, thermally activated 10-18 Water Other Dolomitic flour waste sawn out dolomite rock has the following chemical composition, wt.%: Mg (OH) 2 2.6-2.9; MgO - traces, - MgCOj 36.0-37.8. Thermally activated dolomite flour is obtained by crushing or sawing - dolomite rock with its subsequent calcination at SOO-TOO C for 1 h,

The powder obtained in this way is a hardener of the bad glass, contributes to the process of silicatization and provides a strong adhesion to the coating with the substrate.

The composition is applied by brush, roller or spray on asbestos cement, silicate and stone surfaces.

The coating acquires the necessary strength in 24-48 hours.

The compositions for coating building products are given in table. one,

.Table 1

Dolomite flour, thermally active10 bath

15

Dolomite flour

Gal to

ten

Pigment

37

Bojta

Compositions 4 and 5 are given for the process of the quantitative ratio of the components. Indicator

Abrasion resistance in kg / μm; in a dry state of about; 710,740,, 9 in the wet state0,610,650.70 YNHK

70

Frost osoyosty, cycles

about

20

18

25

14

ii5

10 10

ten

ten

20

20

12

32

Sravkitel 1st physico-mechanical characteristics of the coatings are given in

tab. 2,

table 2

0.45

70

52

55

Claims (2)

50.0 Coating from the composition of the composition iiiii:: 2 :: 1: E: 1 Prototype 0.6.00.650.61 0.470.5 59 The coating obtained from the proposed composition has a high weather resistance, which allows its use for exterior decoration of buildings. Claims Composition for coating building products, including liquid curd glass, dolomite flour, talc, pigment and water, characterized in that, in order to increase the resistance to frost and frost resistance of the coating, it additionally contains dolomite flour that is thermally activated when it is barely 16 The following ratio of components, wt.%: Liquid potassium glass 25-35 Dolomite flour 15-22 Talc 3-8 Pigment 5-10 Dolomite flour, terinally activated 10-18 WaterEverything Other Information sources taken into account Ize 1. Inventor's certificate USSR № 755768, cl. From 04 To 19/04, 1975. 2. USSR author's certificate in application number 2996164/33, C 04 B 19/04, 10/20/80 (prototype).