RU2219140C2 - Marble composition for finishing works - Google Patents

Abstract

FIELD: building industry. SUBSTANCE: invention relates to building compositions used in internal and external finishing buildings of industrial and civil designation. Invention proposes to add to the composition based on mineral filling agents and polymeric binding agent plasticizing agent, preserving agent, anticoagulating agent for aqueous dispersions and fixing agent. Composition contains the following components as mineral filling agents, wt. -%: powdered marble, 35-37; powdered dolomite, 3.5-4.5; marble crumbs, 20-22; quartz sand, 15-25. Invention proposes to use two dispersions as a polymeric component, wt.-%: polyvinyl dispersion, MDP-50, 10-12; acrylic dispersion A-6000, 3.5-4.5. The proposed preserving agent for aqueous dispersion coside T230 is antiseptic and it is added to composition in the amount 0.1-0.3%. Aqueous ammonium solution in concentration 25% is used and it is added in the amount 0.06-0.08%. Methylcellulose is used as plasticizing agent in the amount 0.4-0.6%. Invention provides preparing building composition showing the enhanced plasticity, improved adhesion and resistance against fungi. EFFECT: valuable properties of composition. 2 cl, 2 tbl

Description

 The invention relates to the field of construction, and more particularly to building compositions used in the interior and exterior decoration of industrial and civil buildings.

A known composition for coating surfaces of buildings (application 96113788/04 of 08/08/96, IPC C 04 B 26/04, publ. 10/27/98, BI 30), including a natural filler (marble chips), a copolymer binder (emulsion acrylic) and a polymerization inhibitor (acetone) in the following ratio of components, wt.%:
Marble chips - 89 - 90
Acrylic emulsion - 7.5 - 8.0
Technical Acetone - 2.0 - 3.5
The described composition has insufficient adhesion, in addition, the product coated with this composition may be affected by the fungus.

Known marble composition for finishing work (application 95118894/04, IPC C 04 B 26/06, publ. 20.10.97, BI 29), including marble mineral filler and copolymer binder in the following ratio of components, wt.%:
Marble chips - 83 - 90
Acrylic emulsion - 10 - 17
The disadvantage of the above composition is its low ductility and adhesion, a high probability of damage by the fungus during storage of the composition and the treated surfaces.

Fillers: coarse sand, or granite screenings, or crushed marble fr. 0.63 - 5.0 mm - 25 - 40
Building sand 0.1 - 1.25 mm - 18 - 35
Kaolin - 6 - 15
Carboxymethyl cellulose or hydroxyethyl cellulose - 0.05 - 0.4
Pigments, for example titanium dioxide or others. - 0.1 - 8.0
Chloroparaffin - 0.4 - 1.0
Oil-soluble polyethylene glycol ethers of alkyl phenols - 0.04 - 0.1
Silica fume (aerosil) - 0.03 - 0.1
Water - Else
The described composition for covering facades has insufficient impact strength, and also has low decorative qualities, in addition, a large proportion of volatile substances in the described composition.

 When creating the invention, the task was to obtain a building composition with increased impact strength, as well as to increase decorative qualities and make the composition more environmentally friendly by reducing the proportion of volatile substances.

This is achieved by the fact that in the composition based on mineral fillers, a binder based on synthetic latexes, preservative, pigment, water, ammonia is additionally added as a fixative, methyl cellulose as a plasticizer. As mineral fillers, the composition contains the following components, wt.%:
Marble flour - 35 - 37
Dolomite flour - 3.5 - 4.5
Marble chips - 20 - 22
Quartz sand - 15 - 25
As a polymer component, it is proposed to use two dispersions, wt.%:
Polyvinyl dispersion, MDP-50 - 10 - 12
Dispersion acrylic A-6000 - 3,5 - 4,5
The proposed preservative for water dispersions - T230 cockide, is an antiseptic and is added to the composition in an amount of 0.1-0.3%. Apply a 25% aqueous solution of ammonia and enter it in an amount of 0.06-0.08%. As a plasticizer, methyl cellulose is added in an amount of 0.4-0.6%.

 As a result of using a mixture of mineral fillers, the composition acquires improved mechanical properties, as well as a decorative effect. So quartz sand (fraction up to 0.4 mm), used as an additional filler, gives the composition strength, density, and frost resistance. Dolomite flour acts as a filler that improves the adhesion of the composition. A mixture of marble chips (fr. 0.5-1.0 mm and 2.0-2.5 mm in equal shares) gives the surface a bump and creates a light effect. Aqueous 25% ammonia solution is used as a hardener and hardener. Methyl cellulose was used as a plasticizer; an increase in its quantitative content in the composition affected the mechanical properties. The composition is very plastic and more environmentally friendly than in the prototype, since the amount of volatile substances used is reduced.

 Table 1 shows specific examples of the compositions of the compositions that were used to study their properties.

 As can be seen from table 1 in columns 1 and 5 selected quantitative values of the components that are beyond the scope stated in the claims, and in columns 2, 3 and 4, the quantitative values of the components correspond to those stated in the claims.

 A specific example of the method of obtaining the proposed composition.

To obtain the composition, first prepare a mixture of liquid components:
dispersions of MDP-50 - 9 wt.%, dispersions A6000 - 3 wt.%, preservative - 0.1 wt. % Mineral fillers are added to the mixture, mixing, in the following sequence: marble chips - 18 wt.%, Sand - 17 wt.%, Marble flour - 32 wt.%, Dolomite flour - 3 wt.%. Then enter the plasticizer - methylcellulose 0.4 wt.%. After mixing, add pigment - titanium linen - 2.5 wt.%, A solution of 25% ammonia - 0.006 wt.% And add 0.2 wt.% Water. The whole composition is finally mixed for 10 minutes until the mixture is completely homogeneous.

 Table 2 shows the mechanical properties of the obtained compositions are presented in table 1.

 As can be seen from table 2, the mechanical and technological properties of the compositions presented in column 2, 3, 4 are more acceptable as consumer properties of the compositions. So the impact strength of the proposed composition increased in comparison with the prototype by 15-20%. The composition is more environmentally friendly, because the amount of volatile constituents decreased by 10%.

Claims (2)

1. Marble composition for decorating, containing marble chips as a filler and an acrylic binder, characterized in that it contains an acrylic copolymer dispersion A-6000 as an acrylic binder and additionally contains MDP-50 polyvinyl acetate dispersion as fillers, as fillers - marble flour, dolomite flour and quartz sand, a preservative with antiseptic properties, titanium linen as a pigment, methyl cellulose as a plasticizer, 25% aqueous ammonia and du at the following content of components, wt.%: Polyvinyl Acetate Dispersion MDP-50 10-12 Dispersion acrylic copolymer A-6000 3,5-4,5 Marble flour 35-37 Dolomite flour 3.5-4.5 Marble chips 20-22 Sand quartz 15-25 Preservative Antiseptic 0.1-0.3 Cellulose 0.4-0.6 Ammonia (25% aqueous solution) 0.06-0.08 Pigment 2.2-3.5 Water Else 2. The composition according to claim 1, characterized in that as a filler it contains a mixture of marble chips of two fractions in equal proportions (0.5-1.0 mm and 2.0-2.5 mm).

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