SU1252322A1 - Foamer for foam-gypsum mix - Google Patents

Description

The invention relates to construction materials and can be used for the manufacture of products with a porous structure.

The purpose of the invention is to increase the utilization rate of foam, resistance to mineralization and the improvement of foam generation.

Sodium sulfate and sodium chloride are incorporated into the foaming agent as processing aids. Higher fatty alcohols increase the viscosity of the foam, which is very important to ensure its stability and increase the utilization rate of the foam.

Use as alkyl sulfates of monoalkyl esters of sulfuric acid with C 45 alkyl chain length

neutralized sodium alkali

it provides high stability

foam against mineralization.

The proposed foaming agent is most preferred for use in lightweight gypsum board technology. Foam gypsum for filling the core of the sheet is obtained by a two-stage technology. The foam gypsum mixer, in which the gypsum mortar is prepared, is continuously supplied with technical foam in a predetermined amount to ensure the required density of the core. The foam is mixed with the gypsum mortar, and the finished foam gypsum is continuously fed from the pey-gypsum mixer onto a moving cardboard tape at a speed of 15-25 m / min.

Monoalkyl esters of sulfuric acid with a length of alkyl Cj - C, 5, neutralized

lye alkali

Sodium Sulphate Sodium Chloride Higher Fatty Alcohols

Water

Due to the high speed of the forming conveyor, the following requirements are imposed on the foaming agent: high foam generation rate, resistance to mineralization when the technical foam interacts with the gypsum mixer and the solution in the foam gypsy mixer, and high foam utilization ratio,

those. preservation of foam volume when mixing it with plaster solution.

To prepare the foam, a 5% aqueous solution of the polyeater is used, which is treated in a foam generator.

The compositions of the blowing agent are given in table. 1 (compounds 1 - 3 - proposed, compounds 4 and 5 are banned

In tab. 2 shows the performance of technical foam, obtained using the specified compositions of the foaming agent and the known (known composition is tested in the form of a 2X aqueous solution).

Thus, the utilization rate of the foam obtained from the proposed blowing agent is 35% higher than that obtained using a known composition. Foam can withstand mineralization up to 20 g / l, which is 3 times higher than that of the known composition; the same advantage and speed of generation.

Table 1

Utilization rate 0.97 0.98 0.96 0.93 0.92 0.72

Resistance to mineralization (withstands mineralization up to g / l 16 20 21 14 18 6

Generation time, from 0.4 0.3. 0.5 0.6 0.65 1.2

Compiled by O. MoDrina Editor I. Derbak Tehred M. Morgantal Corrector I. Musk

Order 4586/26 Circulation 640 Subscription VNYSHI of the State Alteta USSR Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

1252322.4

Table 2

Claims (1)

FOAM FORMER FOR FOAM-GYM MIXTURE, including alkyl sulfates, sodium sulfate, additive and water, characterized in that, in order to increase foam utilization, resistance against mineralization, improve foam generation, it contains monoalkyl sulfuric acid esters with an alkyl chain length of C _fJ , neutralized with sodium alkali, and as an additive, sodium chloride and higher fatty alcohols in the following ratio of components, wt. X: Monoalkyl esters of sulfuric acid with an alkyl chain length of C _s - C ₁₅ neutralized with sodium alkali 20-40 Sodium Sulfate 1-2 Sodium Chloride 2-4 Higher Fatty Alcohols 1-6 Water Else