SU1201274A1 - Raw mixture for producing sound-absorbing articles - Google Patents

Abstract

1. RAW MATERIAL MIXTURES FOR THE PRODUCTION OF SOUND-ABSORBING PRODUCTS, including mineral wool, organic glue, mineral binding, copolymer dispersion, polyethylsilazane, and water, so that, in order to replace food products and anti-static products, it is necessary to replace foodstuffs and anti-static products, and to remove antistatic elements, as well as water, antistatic products, and antistatic products. as an organic glue contains sodium salt of carboxymethylcellulose, as a mineral binder - kaolin,, as a dispersion of a copolymer - butadiene, styrene latex and additionally - sodium tetraborn acidic and dusty waste generated during grinding and sizing of products made from a mixture. With the following ratio of components, wt.%: Mineral wool 20.00-28.50 Sodium salt to arboc simethylcellulose, 40-0.50 withes 4.50-7 , 50 Kaolin Butadiene-styrene i latex (in the calculation of 1.40-3.50 per dry substance) 0.05-0.10 Born aki slots a 0.001-0.005 Poly ethyl strength az en Sodium tetraboro-0.30-0, 45 sour c. 1.40-3.50 Dusty Waste Else Water 2. A mixture of pop, 1, characterized in that, in order to N9 reduce the bulk density and improve thermal insulation properties, it 4 additionally contains a blowing agent or an air-entraining additive in the amount of 0, 01-0.03 wt.%.

Description

The invention relates to the manufacture of building products with sound-absorbing properties used for the decoration of premises and the required reduction of the noise level. The purpose of the invention is to replace the food product and improve the antistatic properties obtained from the mixture of products. G. .. As a blowing agent can be used; known foaming agents, tipol, sulfonol, ethoxylated alkyl 11-phenol, a mixture of sodium, salts of sulphate esters of secondary alcohols, etc.) or air-attracting additives, for example a sulphite-yeast mash. Butadiene styrene latex used in the proposed raw mix (SCS-65GP) is a 47-60% aqueous dispersion of a copolymer of butadiene with styrene with a suitable monomer ratio. 35:65. Introduction to the raw mix as a mineral in a live kaolin instead of gypsum used in the raw mix of the prototype increases the moisture resistance of the products, which allows to drastically reduce the consumption of hydrophobizator GKZH-94 in the proposed mixture and, i, in addition, replacing gypsum with kaolin improves the antistatic properties of the obtained of the raw mixture of products Introduction to the raw mixture of sodium CMC in the above amount allows you to completely replace the food product - starch, used in the raw mixture according to the prototype, without reducing the main physicomechanical properties of products in comparison with the physicomechanical properties of products manufactured from the raw material mixture of the prototype. The introduction of powdered waste with a specific surface area of 1800-2300 and a density of 170,200 kg / m, which are formed during grinding and calibration of products made from the proposed mixture, into the raw material mixture makes it possible to increase the uniformity of distribution of the mixture components among themselves during the prepared molding composition, which, in: turn, allows to increase the structural homogeneity of the products obtained from the mixture and the uniformity of their physicomechanical properties. 7D2 The cumulative use of boric acid, sodium tetraborate and polyistilane in the raw material mixture (GHK-94) in the above quantities allows to significantly increase the antistatic properties of products made from the intended raw mixture. The raw mix is prepared as follows. Water is added to the calculated amount of sodium salt of CMC with stirring (15-20 hours from the mass of sodium CMC) and allowed to swell for 3-4 hours at room temperature. While stirring, the rest of the water is added to the gel to the calculated amount and the calculated amount of sodium tetraborns / acid, borioic acid, NGL-94, styrene-butadiene-latex SKS-65P1, kaolin and dust-like waste formed during grinding and sizing made from the proposed mixture products, as well as, if necessary, the estimated amount of frother or air entraining agent. The whole mass is stirred for 15 minutes. After mixing these components, the calculated amount of mineral wool is added to the mixture and mixed for 1-4 minutes. The resulting mass with a moisture content of 150-160% is molded in a continuous way in the form of sheet material and dried at 100-126 ° C to a residual moisture content of 1-3% for 20-24 hours. The dried products are subjected to grinding and calibration. The front surface of the finished products is sprayed with a paintbrush or brush. Table B, 1 shows examples of specific performance and test examples. In tab. 2 shows the physico-mechanical properties of the material based on the compositions given in table. 1. I As follows from the data presented in Tables 1 and 2, the proposed raw material mixture for the manufacture of sound-absorbing products, in comparison with the known raw material mixture, ensures the production of products made from a mixture with higher antistatic properties and, thus reducing consumption paints based on aqueous dispersions of polyvinyl acetate when painting the front surface of finished products by 15-30% due to a significant decrease in the roughness of the surface of products in the process of their grinding and calibration, as a result of improved anti static material properties of products derived from the proposed mixture.

Test cases 6-14 show the materiality of signs composition of the proposed raw mix, as well as quantitative values of the qualitative characteristics of the proposed raw mix.

The foodstuff - starch, used in the composition of the raw material mixture of the prototype, in the proposed raw material mixture is completely replaced by a non-food product - sodium carboxymethylcellulose without reducing the basic physicomechanical characteristics of products manufactured from the raw mixture.

The implementation of the invention in the national economy allows to obtain a high technical and economic effect.

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Claims (1)

1. RAW MATERIAL MIXTURE FOR PRODUCING SOUND ABSORBING PRODUCTS, including mineral wool, organic glue, mineral binder, copolymer dispersion, boric acid, polyethylsilazane and water, characterized in that, in order to replace the food product and increase the antistatic properties obtained from the mixture organic glue contains sodium salt of carboxymethyl cellulose, as a mineral binder - kaolin, as a dispersion of a copolymer - styrene butadiene latex and additionally - sodium tetrabornoxide first and pulverulent waste generated during grinding and calibrating manufactured products from a mixture of the following component ratio, wt.%: Mineral wool 20.00-28.50 Sodium salt to arbok simetiltsellu- vines 0.40-0.50 Kaolin 4.50-7.50 Styrene butadiene latex (calculated dry matter) 1.40-3.50 (L Boric acid 0.05-0.10 and) Poly e Til Seel Az An 0.001-0.005 from Sodium tetraborne— sour 0.30-0.45 Λ Dusty waste 1.40-3.50 Water Rest KZ 2. The mixture according to claim 1, about t l and h and - about I am with the fact that , with the aim of volumetric reduction and higher— thermal insulation properties she Μ additionally contains foamy q Vatel or air-entraining additive in an amount of 0.01-0.03 wt.%. > eleven