SU963973A1 - Foaming agent - Google Patents

Description

(54) FORMER

The invention relates to the production of building products of a cellular structure, such as lightweight gypsum sheets.

Foaming agents are known, including petroleum sulfonic acids and sulfite-alcohol bard modified with urea. 11

The technical essence and the achieved result closest to the proposed frother is a frother, including secondary alkyl sulfates and 4080 wt.% Sulfite-alcohol sulphite C23.

The disadvantage of such a foaming agent is the low resistance of the foam, especially in the process of preparing mortars and concretes, as evidenced by the low yield coefficient, for example, the foam-gypsum mixture.

Integral inventions are to increase foam resistance.

This goal is achieved by the fact that the Frother, which includes secondary alkyl sulfates, additionally contains sodium bisulfonaphthalenemethylene salt with the following component correlation, wt%:

Secondary

alkylsulfonates 10.0-90.0 Sodium salt of bisulfonaphthalenemethylene 10, 0-90.0 Sodium salt of bisulfonaphthalenemethylene the enlargement of air bubbles, and this leads to an increase in the resistance of the entire system 15. A foaming agent is more effective for preparing foamed gypsum that is used in the process of manufacturing building products. gypsum

20 includes three main stages: the preparation of foam, the preparation of a gypsum solution (a mixture of gypsum in a binder and water) and the mixing of the foam with a gypsum solution. In this case, 25, the foam resistance is estimated by the yield ratio of the foam-gypsum mixture, Kd (the ratio of the volume of the foam-gypsum mixture to the sum of the volumes of the foam and gypsum solution). The higher the resistance of the foam 30, the less it extinguishes in the process of preparing the foamed gypsum and the greater the coefficient Kg.

PRI im p 1 .. A frother consisting of 90% secondary alkyl sulfates and 10% disodium methane is prepared. Lenbis; From the resulting foaming agent, a 2% aqueous solution is prepared which is mechanically dispersed to obtain a foam (the ratio of the volume of foam to the volume of the initial solution of the frother and the stability of the foam is determined according to GOST 9603-69).

Example 2 A foaming agent was prepared consisting of 10% secondary alkyl sulfates and 90% disodium methylene bis. From the resulting body foams, a 5% aqueous solution is prepared, which is processed into foam.

EXAMPLE 3 A foaming agent was prepared, consisting of S0% secondary alkyl sulfates and 50% disodium: methylenebis. 3% aqueous Secondary alkyl sulfates are prepared from the resulting blowing agent.

60

Disodium methylenebis

Sulfite-alcohol bard

42 24 38 16 44 20

23

nineteen

eleven

eight

18

15

solution that is processed into foam.

Compositions 1, 3, 5, proposed and 2, 4, 6 known t21 converters are given in table. one.

In all the examples, foamypsum is prepared from the resulting foam by mixing 40 o6i.% Foam and 60 vol.% Gypsum solution and gypsum plaster grade G-4A2 (GOST 125-79) at V / G-0.55

The test results of the samples are given in table. 2

As follows from the table. 2 data, when using the proposed foaming agent, the foam resistance in the manufacture of building products increases by 1.5-2 times. At the same time, the moisture content of the formed products decreases by 10–30%, which allows reducing fuel consumption for drying products made using the proposed frother.

Table 1

ten

20

50

50

90

50

80

50

table 2

0.78 0.51 0.87 0.32 0.85 0.39

Claims (2)

1. Author's certificate of the USSR 670321, cl. On 01 F 17/00, 1977. 2. Authors certificate of the USSR 619461, cl. C 04 B 21/02, 1978 (PROTOTYPE).