SU1217840A1 - Raw mixture for manufacturing decorative acoustic material - Google Patents

Description

The invention relates to construction materials, namely, the production of acoustic materials.

The chain of the invention is to reduce the cost, exclude the starch binder and increase the decorative and acoustic properties of the material,

EXAMPLE 1 A scopa in an amount of 27% is treated with a solution of sulfonol in an amount of 0.05%, previously diluted in 3% water, to a grinding degree of 50 SR. At the same time, in a foam generator of type PG-3, a pepper is prepared with a multiplicity of 5. Preparation of peeing, 1y includes a dosage of water in the amount of 16.75%, adding 0.20% of sulfonic acid to this water and 0.1% sulfuric acid pH 7 (in the amount of 2%) stirring for 2 minutes, administering 6% PVAD and stirring for 2 minutes.

The resulting foam is mineralized in eatery in the amount of 45%.

The molding mass is poured into molds with a size of 920–300 mm, smoothed by a pressure roller with a pressure of 0.02–0.04 Sha, and then sent for drying. The products are dried at a temperature of 60–70 s to a residual moisture content (5%).

 According to the described technology make samples, the compositions and properties of which are presented in Table. one.

. When the concentration of the sulfuric acid solution is greater than 1%, corrosion of the equipment used is observed, a pH of 4-7 is not reached in the sulfonic acid solution below 0.1%.

Indirectly, the chemical effect of sulfuric acid in the range of 0.1-1%

Components

45 27

0.25 0.10

0

five

0

five

0

five

estimated by the change in pH.

The results of the definitions are presented in table. 2 .. From table. 2 it can be seen that the optimal concentration of sulfuric acid, necessary to achieve a pH of 4-7, is a concentration of 0.1-1%. At such a concentration, the strength of samples of products made from the proposed raw mixture increases compared with the known their density ..

In order to use an osprey with a natural moisture content of 70-85% without additional hydrotreatment, it was pretreated with a foaming agent to better distribute its fibers in the raw mix.

In tab. 3 shows the results of processing the osprey.

From tab. 3, it can be seen that to achieve an even distribution of the osprey fibers among the components of the raw mix, when used with natural moisture, no additional hydroprocessing is required. When using osprey without processing with a foaming agent, it is necessary to increase the water content in the mixture approximately by half, which will lead to a decrease in the strength of the material and additional costs of heat used to dry it.

The use of the proposed decorative acoustic material will expand the range of this class of materials, as well as expand the base for the production of decorative acoustic materials using industrial waste: scop and phosphogypsum.

Table 1:

38 42

0.10 0.05

38-50

0.2-0.5

Water (when used.

Progress)

Indicators Density, kg / m

Strength at

bending, MPa

Sound absorption coefficient - at a frequency of 1000 Hz

0.81 0.94 1.42 1.52

Density, LSG / mz

550 543 557 551

Continuation of table 1

18.2716.90

551

550

350-400

1.0

1.05

1.03-1.12

0.630.74

0.51.

table 2

1.66 1.68 2.1 Corrosion

equipment

550 550 554

12-20 50

24-40 50

Editor A.Lezhnina

Compiled by N. Kosheleva Tehred A.Ach

1079/29 Circulation 640 Subscription

VNIIPI USSR State Committee

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

Branch PPP Patent, Uzhgorod, Proektna St., 4

1217840.

Table 3

Proofreader M. Demchik

Claims (3)

1. RAW MATERIAL MIXTURE FOR THE PRODUCTION OF DECORATIVE-ACOUSTIC MATERIAL, containing gypsum, a fibrous component, water, a foaming agent, a polyvinyl acetate dispersion and an additive, characterized in that, in order to reduce the cost, eliminate the starch binder and increase the decorative-acoustic properties, the fibrous component contains osprey, and as an additive - a solution of sulfuric acid, when wearing gypsum components Scop Foaming agent Polyvinyl acetate dispersion Sulfuric acid solution Water 2. A mixture according to π.1, and I with the fact that the following is appropriate. %: 38-45 27-42 0.05-0.25 2-6 1-2 The rest is distinguished by a solution of sulfuric acid of 0.1-1.0% concentration. 3. A mixture of pop. 1, characterized in that it contains osprey · with a natural process humidity of 70-85%. * 1217840