SU1250545A1 - Composition for heat-insulating material - Google Patents

Description

one

The invention relates to the production of heat insulating materials suitable for use in shipbuilding, aviation, and other areas of the national economy.

The purpose of the invention is to reduce the density, hygroscopicity of the material and increase its water resistance.

The composition includes liquid glass and sodium silicofluoride, oxyethylated alkylphenol and chloride.

Oxyethylated alkylphenol, for example 011-10, is a mixture of oxylated mono- and di-alkylphenols derived from propylene tetramers

ABOUT

Kosen SI ()) „} 1,

where n 10.

The concentration of the aqueous solution of oxyethylated alkylphenol is 60-90%, pH 6-7.

With an increase in the content of this component in the composition, its bulk density decreases, the technological regimes of its preparation decrease. However, when the content of alkylphenols is more than 1.5 wt.%, A decrease in the strength characteristics of the composition is observed (for example, when the content of alkyl feco. BAT, 1.8 Bess.%, The flexural strength is 0.09 M11a); the viscosity of the molding COMPOSIT1P1, it is difficult to fill out the form. In addition, the increased content of alkylphenols converts the composition from the non-combustible discharge to the combustible discharge.

Both sodium, potassium, and potassium-sodium liquid glass can be used in the composition.

Sodium silicofluoride is introduced to produce a non-insoluble product. The content of the component is less than 0.2 wt.% In the composition does not

505452

to the desired result: after 7 days, the composition, placed in water, dissolves. The amount of the component greater than 2.0 wt.% Sharply reduces the shortness of foaming, which increases the bulk density of the composition and its coefficient of thermal conductivity. For example, when the content of silicofluoride sodium is 2.5 wt.%, The volume mass increases 10 times.

Calcium chloride enhances the effect of water insolubility of the product, increases the water resistance of the composition. The content of calcium chloride in the composition of less than 0.2 wt.% Does not lead to significant differences compared with the prototype (for example, 71 to 0.1 wt.% Water absorption after 180 hours is 180%). Amount of component more

20 2.0 wt.% Reduces the rate of foaming, requires a significant consumption of liquid glass. For example, with 2.5% by weight of calcium chloride per 1 m of the heat insulating composition,

25 with almost 2 times more liquid glass.

Example. Pre-prepare a water solution of ethoxylated alkylphenol, successively entering into

30 of it is sodium fluorosilicate and calcium chloride. Then in liquid glass with a module of 2.0-3.5 with vigorous stirring in a binder (at least 500 rpm) are preliminarily introduced

35 a prepared solution of these ingredients. After 2-3 MIH of homogenization, the THD composition ends. The prepared mixture is poured into a grinder. A simple cage with a lid and maintained at 350–450 ° C.

40 within 1-1.5 hours. After cooling, the mold is opened n and: remove the finished product.

Examples of the compositions are presented in 45 p. 1. Physical and physicomechanical properties of heat insulating materials are presented in Table 2.

ProtoTable 1

table 2

Claims (1)

COMPOSITION FOR HEAT-INSULATING MATERIAL, including water glass, sodium silicofluoride and water, characterized in that, in order to reduce the density, hygroscopicity and increase the water resistance of the material, it additionally contains hydroxyethylated alkyl phenol and calcium chloride when the following relation components May.%: Liquid Glass Silicon Fluoride 74-92.5 sodium 0.2-2 Water 7-25 Oxyethylated Calcium Chloride 0.2-2 G ss ω G alkyl phenol 0.1-1.5