SU1248813A2 - Method of producing acoustical and heat-insulating materials - Google Patents

Description

The invention relates to methods for producing acoustic and thermally insulating materials based on mineral inorganic fibers, can be implemented in enterprises that take out building materials, and is an improvement of the invention according to the author. St. No. 1025705.

The purpose of the shade is to increase bending strength and reduce the consumption of materials.

Example 1. Heat and sound insulating plates were prepared from a homogeneous hydromass obtained by mixing mineral wool granules (with added perlite) with a starch binder in an industrial drum blender. The starch content in the binder was 5% w / v, the consumption of the binder was 10% by weight per 100% by weight mineral wool. Nlit molding was carried out on metal pallets - forms. Metal pallets — the forms were coated before use with a polymer coating consisting of SKTN-A rubber and methyltriacetoxysilane, taken in a ratio of 90:10 wt.h. The polymer composition, dissolved in solvent gasoline, was applied to the surface of the molds with a pneumatic sprayer, followed by drying for 2 hours at room temperature. All subsequent operations for the production of heat and sound insulating plates were carried out by a known method. The modifying additive was applied to the surface of the molds with a pneumatic spray in an amount of 0.1 wt.% Of the formable mass. Drying of the slab blanks was carried out in a tunnel dryer at 150-160 ° С, by the end of the drying the temperature was evenly reduced to.

Example 2. According to the technology described in example 1, the blanks were molded from a homogeneous hydromass. Metal pallets — the forms before use were coated with a polymer coating consisting of SKTN-A rubber and methyltriacetoxysilane, taken in a ratio of 93: 7 parts by weight, and dried for 2.5 hours.

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Example 3. The molding and all subsequent operations were carried out according to the technology described in Example 1. Before use, the forms were coated with a polymer coating consisting of SKTN-A rubber and methyltriacetoxysilane, taken in a ratio of 95: 5 mA.

Example 4 (by a known method). Heat and sound insulating plates were made from homogeneous hydromass obtained by mixing mineral wool granules (with the addition of perlite) with a starch binder in an industrial drum mixer. The starch content in the binder was 5% w / w, the consumption of the binder was 10 May / d per 100% by weight mineral wool. The molding was carried out in metal pallets using an oil product with a viscosity of 3.5-15.1 and an aromatic hydrocarbon content of 6-23 wt.% As a modifying additive. The modifying additive was applied to the surface of the form with a pneumatic sprayer in an amount of 0.1% by weight of the formable mass. The plates were dried in a tunnel dryer at 140–160 ° C, and by the end of the surface the temperature was evenly reduced to 70–80 ° C.

The quality indicators of heat and sound insulating plates and the technical and economic indicators of their production by the proposed and known methods are given in Table. 1. It follows from the above data that plates made with the use of a polymer coating have a higher bending strength and a smoother surface. As a result, the loss of materials from the destruction of the plates during transportation and machining is reduced, and the unit costs of food starch and other materials per unit of manufactured products are reduced accordingly. Other properties of the plates obtained by the proposed method are equivalent to those of plates manufactured according to the known method (Table 2).

Table 1

table 2

Claims (1)

METHOD FOR PRODUCING ACOUSTIC AND HEAT-INSULATING MATERIALS by ed. St. No. 1025705, characterized in that, in order to increase the bending strength and reduce the consumption of materials, a polymer coating is preliminarily applied to the mold surface, consisting of SKTN-A rubber and methyltriacetoxysilane, taken in a ratio of 90–95:: 5-10 wt.h . followed by drying for 2.0-2.5 hours at the temperature of the working room. SU „., 1248813