SU863575A1 - Composition for producing heat-insulation material - Google Patents

Description

The invention relates to the production of heat-insulating materials used for insulation of buildings, structures, pipelines.

A known composition for the production of heat-insulating materials, including water glass, filler and 6ορ- | θ butyric acid. The resulting material has high strength, low water absorption £ 1].

However, its bulk weight is high.

Closest to the proposed one is a composition for producing a heat-insulating material, including water glass, dry ι ·· silica and the addition of sodium silicofluoride G2].

The disadvantage of this composition is its high density, equal to 700,750 kg / m \ and the duration of the technological cycle of material production.

The purpose of the invention is to reduce the density of the material and shorten the technological cycle. thirty

This goal is achieved in that the composition comprising liquid glass, dry silica and the additive as an additive contains boric acid in the following ratio of components, wt.% :.

Liquid glass 92.0-95.5 Dry ’ silica 1 / 5-4 Boric acid 3-6

To obtain a thermal insulation material, a mixture of ingredients is prepared.

Dry glass of boric acid and dry cremneem are introduced into liquid glass with a module of 2.6-3.2, with vigorous stirring with a propeller stirrer (at least 600 rpm). After 1-2 minutes, the homogenization of the composition ends. The finished mixture is poured into a hot metal mold with a perforated lid and kept at 300-350 ° C for 20-45 minutes.

After cooling, the mold is opened and the finished product is removed.

Examples of compositions are presented in table. 1.

Table 1

Composition The content of components, wt.% Liquid glass Dry silica Boric acid 1 92.5 1,5 6.0 2 93 3 4 3 95.0 2 3

Physico-mechanical properties of thermal insulation materials are presented in table. 2.

Table 2 quantitative ratio allows you to get heat-insulating material according to the technological regime 4-4.5 times faster and with a low density. In this case, an increase in the water resistance of the heat-insulating material is also achieved. When using boric acid, partial liquid glass neutralization occurs and insoluble silicic acid is released.

IQ Reducing the time of production of heat-insulating material from the proposed composition allows us to increase the volume of our products by 4-5 times, and its qualitative indicators allow us to produce plates of 2000x2000x100 mm in size.

Claims (2)

The invention relates to the production of heat insulating materials used to insulate buildings, structures, pipelines. A known composition for the preparation of heat insulating materials, including water glass, a filler, and boi acid. The resulting material has high strength, low water absorption. However, its volumetric weight is high. Closest to the present invention is a composition for the preparation of a heat insulating material, including liquid glass, dry silica and the addition of sodium fluorosilicate G2J. The disadvantage of this composition is its high density, equal to 700,750 kg / m, as well as the duration of the technological cycle of material production. The purpose of the invention is to reduce the mass density and reduce the texHO logical cycle. The goal is achieved by the fact that the composition, including liquid glass, dry silica and the additive, contains boric acid as an additive in the following ratio of components, wt.% :, Liquid glass 92.0-95.5 Dry silica1.5-4 Boric acid3-6 To obtain a heat insulating material, mixtures of ingredients are prepared. Dry boric acid and dry silica are introduced into water glass with a modulus of 2.6-3.2, with vigorous stirring with a propeller stirrer (at least 600 rpm). 1-2 minutes homogenization of the composition is complete. The finished mixture is poured into a hot metal, perforated lid form and held at 300-350s for 20-45 minutes. After cooling, the mold is opened and the finished product is removed. Examples of compositions are presented in table. 1. L of the quantitative ratio allows to obtain heat-insulating material according to the technological regime 4-4.5 times faster and with low density. With this, an increase in the water resistance of the heat insulating material is also achieved. When using boric acid, partial neutralization of water glass occurs, and insoluble silicic acid is released. Reducing the time of production, the heat insulating material of the proposed composition allows an increase in the volume of output by 4-5 times, and its quality indicators allow producing plates of 2000x2000x100 mm. Claims of the Invention The composition for producing a heat insulating material, including liquid glass, dry silica and an additive, is characterized in that, in order to reduce the density of the material and reduce the production cycle, it contains as an additive boric acid in the following ratio of components, wt.% : Liquid glass 92.0-95.5 Dry silica 1,5-4 Borna acid 3-6 Sources of information taken into account when spertiz 1.Artist's testimony of the USSR 558016, cl. From 04 To 19/04, 1974, 2. Grigoriev P, N. Soluble glass, M., Promstroiizdat, 1956, p. 321-323.