SU963980A1 - Composition for fire-protecting coating - Google Patents

Description

The goal is achieved in that the composition for a flame retardant coating, including liquid sodium glass, exfoliated vermiculite and unfired vermiculite, additionally contains fine powders of rock-forming minerals, mineral wool and nepheline fire retardant, and as the unfired vermiculite concentrate, the concentrate will contain the mineral wool and nepheline flame retardant. wt.%:

Liquid sodium

glass 18-72

Swollen

vermiculite6-20

Concentrate

rrmiculitova

ore 10-32

fine

rock powders

forming minerals 5-15

Mineral

cotton wool. .3-7

Nepheline

fire retardant4-8

The fire retardant coating obtained from the inventive composition applied to the protected surface does not melt or peel off from it.

In addition, under fire, it is not destroyed and, at a layer thickness of 10 mm, it reports metallic structures to a fire resistance limit of 1 h.

The proposed composition is prepared in the following manner.

The binder is mixed with mineral wool, the calcined intumescent filler is then introduced and mixed thoroughly. Then they are loaded into the mixer of forced action. Fine powders of rock-forming minerals. Thereafter, an unsealed intumescent aggregate is introduced. The nepheline fire retardant is last introduced. All components are mixed until homogeneous for 3-4 minutes.

One of the appropriate areas of application of such a composition is fire protection of building structures.

Examples To obtain compositions for flame retardant coating components are taken in the ratio, wt.%, Specified in Table. one.

The approximate quantitative mineral composition of the rock-forming yutneral is presented in table. 2-.

The compositions are prepared by mixing the components in the following sequence: liquid glass is thoroughly mixed with mineral

cotton wool, then enter the calcined vermiculite and mix. Subsequently, fine powders of rock-forming minerals are loaded into a forced-action mixer. After this, vermiculite ore concentrate is introduced. The last load nepheline flame retardant. All components are mixed until homogeneous for 3-4 minutes.

These mixtures were tested for compressive and flexural strength and fire resistance.

 Tests for compressive strength and bending were carried out according to the standard method (GOST 5802-76), and tests for fire resistance were carried out according to standard temperature conditions on special installations designed and manufactured according to the recommendations of the VNNIPO USSR Ministry of Internal Affairs.

When tested for fire resistance, visual observations were made of the condition of the coating under fire exposure.

The main properties of the coatings are presented in table. 3

Analysis of the data obtained during the testing of fire retardant coatings shows that with the additional introduction of fine powders of rock-forming minerals, mineral wool and nepheline antiperin, the fire retardant coatings become more durable (not destroyed by fire exposure) and their fire resistance increases by an average of 20-25%.

Raw materials have better processing properties when applied compared to compositions that do not contain additional components.

Moreover, when the content of fine powders of rock-forming minerals in the raw material composition is more than 15%, mineral wool more than 7% and nepheline flame retardant more than 8%, the swelling of the coating decreases and its thermal conductivity increases, which leads to a sharp decrease in the fire resistance of the coating.

Introduction to the composition of the additional components, respectively, less than 5, 3, and increases the coating with fire exposure and fire resistance.

The proposed composition provides the strength of the coating during operation under fire impact and the required fire resistance of all types of structures, with the exception of load-bearing walls, walls of stairwells and columns.

Component

Table 1

Content, May.%

Composition number

Sodium Glass,

JT 1.46 g / cm, module 2.7 (GOST 13078-67)

Expanded vermiculite (GOST 12865-67)

Concentrate of vermiculite ore .РВ-80 1ТУ-21-25-75-71)

Fine powder

rock-forming minerals

Mineral wool brand 75-100 (GOST 4640-76)

Nepheline flame retardant (TU-08-340-76) See table. 2 Rock-forming mineral Feldspar Horn snag, pyroxene Calcite. Apatite The rest of the minerals, including magnetite. . Indicator |

Compressive strength, kgf / cm

Flexural strength, kgf / cm

45

18

13

20

21

32

ten

15

five

7

eight

6 By. i

132

121

41

38 Table 2 I Mineral content,% 16-27 30-40 10-12 5-18 2-3 Table 3 Exposure of the composition ii 1 ... J ... i

Fire resistance, min

62

Claims (3)

Coating State During Fire Tests Behavior of Raw Material Composition When Placed on Plates Claims of the Invention A composition for a fire retardant coating, including liquid sodium glass, expanded vermiculite and unfired vermiculite, with the aim of increasing fire resistance and fire resistance and improvement of technological properties in. during the deposition process, it additionally contains fine powders of rock-forming minerals, mineral wool and nepheline flame retardant, and f as unfired vermiculite concentrate vermiculite ore with the following ratio of components,% by weight: Liquid sodium glass 18-72 Expanded vermiculite 6-20 Continued table. 3 66 70 Swelling without destruction, eTC, no cracks on the surface. When applying the raw material composition on the surface of metal plates, there is no swelling and detachment of the raw material. Coycentrate of vermiculite ore Fine-dispersed powders of minerals Mineral wool Nepheline flame retardant Sources of information were taken into account during the examination. certificate of the USSR 75342, cl. E 04 B 1/94, 1968. 2. Sorin V. and others. Fireproof digging of OFP-MM Building materials, 10, 1977. 3. USSR author's certificate 09563, cl. From 04 To 43/10, 1976.