SU1046268A1 - Adhesive paste - Google Patents

Description

The invention relates to the production of adhesive mastics used to fasten natural stone and ceramic tiles to vertical surfaces. Known adhesive mastic for fastening ceramic plates to vertical surfaces, comprising 100 wt.h. an aqueous solution of carboxymethylcellulose, 00 wt.h. cement-sand mixture polyvinyl acetate dispersion Cl 1 Such mastic ensures sufficient adhesion of thin-layer ceramic plates to concrete (gfp 1.7-1.8 MPa), however the adhesion decreases when wetted, which prevents the use of mastic for sandstones and zones wet mode of operation, as well as external facing works. In addition, this mask is kept at a thickness of 3 mm. The tile with a mass of not more than 9 kg / m and with a layer thickness of 5 mm is not more than 6 kg / m. Mechanical fastening of plates is required. Also known is the adhesive composition including, mac.ch .: casein adhesive OB, portland cement 3, sand 1 and water 2.5. So mastic provides adhesion to concrete of a ceramic tile of 1.8-1, $ MPa in a dry state of C2 However, after 10 days. In water, the adhesion strength decreases to 0.8-0.9 MPa. when the thickness of the layer is 3 mm, it retains a tile with a mass of not more than 9.5 kg / m. and at 5 mm - no more than a layer thickness of 6.5 kg / m. The closest in technical essence and the obtained result to the invention is adhesive mastic, comprising, by weight%, a mixture of aqueous dispersions of elastomers (acrylate latex, styrene-butadiene latex 3,2-12), stabilizer 1-3, portland cement 15-25v sand 30-50 , chalk 5-10 and water 8-13 H. The mass of the inlet cover held on the vertical surface with adhesive mastic with a thickness of 3 mm of mastic is 5.5 kg / m, with a thickness of 5 mm 3, 5 kg / m that is not enough and does not allow sticking to the vertical surface of the slab of natural about stone The purpose of the invention is to provide the possibility of fastening plates of natural stone to a vertical surface. The object of the invention is achieved in that the adhesive mastic, comprising an aqueous dispersion of an elastomer, sand, portland cement and water, contains as an aqueous dispersion of an elastomer an aqueous dispersion of an elastomer selected from the group consisting of styrene butadiene copolymer, chlorosulfonated polyethylene and methyl methacrylate copolymer with chloroprene, and additionally powder and aluminum sulphate in the following ratio of components, ac.%: Aqueous dispersion of an elastomer selected from the group consisting of a copolymer of butadiene with a irol, chlorosulfonated polyethylene and copolymer of methyl methacrylate with x oroprene (on a dry basis) 1, b5-1, 95 Portland cement 16.8-19, Sand50, i -58.2 Pulmon lime 2, k - Q, k Aluminum sulfate 0, 50- 1.75 Water. The rest of the mastic is prepared in lobed ashine. Lime is predominantly in the form of a paste with moisture. Examples of the composition of tiotropic cool mastic are given in table 1. The content of the latex is given in terms of the remainder.

Table V

 SCS-65GP latex (water dispersion of butadiene copolymer with styrene)

 latex CSPA (aqueous dispersion of chlorosulfonated polyethylene)

35% latex MX-30 (aqueous dispersion of methyl methacrylate copolymer with chloroprene)

By rtland cement

Comparative test data of two known adhesive mastics and i

Coupling durability with beTonom-300, MPa

Bonding strength with ceramic tiles MPa

Bonding strength with natural stone with a layer thickness of 3-5 mm, MPa

1.8

1.65

1.9

35 recipes of the proposed mastic prio. Table 2.

T a b l and c a 2 9.5 5.5 Mass, held by mastic with a layer thickness of 3 mm, kg / m Mass, held by -. 6.0 3.5 tick at a layer thickness of 5 mm, kg / m Note. In the numerator, 28 days a sample was made. Similarly to composition 2, control examples of mastics were made: lime free 1 2a 1, barium sulfate free (26, instead of aluminum sulfate contains a hardening accelerator calcium chloride (2b), instead of aluminum sulfate contains sodium nitrite - a hardening accelerator (2g ), Properties of mastics according to composes 2a-2g are presented in TVW. Table 3

Continued table. 2 22.5 25.0 27.5 27.0 18.0 20.5 23.0 20, the strength of dry samples through and, in the denominator, the strength of such samples after 10 days in water. Continued table. 3 Nass kg / m retained. Composition with mastic at a layer thickness of 2 g. As follows from Tables 2 and 3, the proposed mastic ensures retention of a tiled coating with a mass of 18-27 kg / m on vertical surfaces, i.e. possibility of fixing not only multilayer ceramic; plates, but also plates of natural stone 10–12 mm thick and weighing 25–30 kg / cm. When facing public unique buildings, mastic replaces thixotropic epoxy mastics and the operation of fixing plates with hooks or pyrone before filling the sinuses with cement paint.

Claims (2)

GLUE MASTIC, comprising a water dispersion of an elastomer, sand, Portland cement and water, characterized in that, in order to enable the fastening of natural stone slabs to a vertical surface, it contains, as an aqueous dispersion of an elastomer, an aqueous dispersion of an elastomer selected from the group consisting of butadiene copolymer with styrene, chlorosulfonated polyethylene and a copolymer of methyl methacrylate with chloroprene, and optionally fluff lime and aluminum sulfate in the following ratio, May Λ Aqueous dispersion of an elastomer selected from the group consisting of a copolymer of butadiene with styrene, chlorosulfonated polyethylene and a copolymer of methyl methacrylate with chloroprene (on a dry basis) Portland cement Sand Lime fluff aluminum sulfate Water 1.65 - 1.95 16.8 -19.4 50.4 -58.2 2.4 - 8.4 0.50 - 1.75 Rest SU., „1046268 1046268 ϊ