SU1209656A1 - Compound for manufacturing heat- and sound-insulating articles - Google Patents

Description

The invention relates to the production of heat and sound insulating materials.

The materials, in particular, the composition for the manufacture of slabs of increased rigidity on the basis of a miner; 1 or glass wool, and can also be used in the manufacture of other types of mineral products.

The purpose of the invention is to increase the durability of products and the preservation of properties during long-term operation of atmospheric conditions.

The composition is made as follows.

At first, the working solution of the binder is prepared, for which the slag of chemical or metallurgical production is suspended in water and mixed, liquid glass is added (d = 1, 4 g / cm, and then 85% orthophosphoric acid and sodium silicate). to the solid in the working solution of the binder 5: (1-8): 1. From the prepared solution in the forced-action mixer, the hydromass is prepared in the ratio of mineral wool to the working solution of the binder equal to 1:10. The hydromass is placed into the mold, the excess solution is sucked off after which the shape This product is heat treated in a drying cabinet for 4-6 hours at which the composition of the proposed composition for the manufacture of heat and sound insulation products is given in Table 1.

It is ground granulated phosphoric slag

Phosphoric acid

Ethyl silicate water repellent natr41

The physicomechanical characteristics of heat and sound insulating products prepared from the proposed mixtures are given in Table. 2

Samples of thermal insulation materials prepared from the proposed composition have high porosity and have good sound-absorbing properties. The dependence of sound absorption coefficient (ofj,) on the frequency of sound vibrations is presented in Table. 3

The data obtained as a result of previous studies of the durability of the known and proposed compositions are shown in Table. four.

From tab. 4 it follows that the proposed composition does not lead to a loss of strength of the products during operation in atmospheric conditions, while, as is known, this loss is 57-, 1%. In addition, the known hygroscopicity of the composition, which leads to higher thermal conductivity of the product, and on samples saturated with water when dried under natural conditions, efflorescence appears, which leads to the complete destruction of the products.

According to the physicomechanical properties of PL. ITA, made from the proposed composition, they comply with the requirements imposed on mineral wool plates of increased rigidity.

Table 1

3.0 3.5 1p6 1.2

0.4 0.3

Strength at 100% deformation, kgf / cm

Sorption Humidity

Heat conductivity at temperature 25 + 5 ° С, kcal / h.m

Water absorption, May. %

40

Humidity, wt.% 1,0

Known 1.4

We offer 1, 4

VNIIPI Order 456/31 Circulation 640 Subscription Branch PPP Patent, Uzhgorod, Proektna St., 4

table 2

1.4 1.5

3.5

3.2 3.0

0.044 0.045 0.045

b15615615

61,, 0 1.0

Table 4

77

121

Efflorescence occurs

3.5

15

Vysolov no

Claims (1)

COMPOSITION FOR MANUFACTURE OF HEAT AND SOUND INSULATION CASE, including mineral wool and water glass, characterized in that, in order to increase the durability of products and preserve properties during prolonged use in atmospheric conditions, it additionally contains phosphoric acid, finely ground granulated slag of chemical or metallurgical production and a water repellent - sodium ethylsipiconate when barely the corresponding ratio of components (in terms of 100% by weight), wt.%: Mineral wool Liquid glass Phosphoric acid Fine-milled granulated chemical slag or metal-dry substance 80-85 10-15 1.2-1.9 gic production Water-repellent sodium ethylsipiconate