CS226550B1 - Disperse coating composition on the basis of aqueous dispersions of vinyl acetate,acrylate,or copolymers thereof - Google Patents

Description

The invention solves the problem of the composition of dispersion paints and adhesives with better theological properties for application with increased frost resistance.

Dispersion paints and adhesives are new types of products whose advantage is limited flammability and reduced pollution of workplaces and air by solvent vapors. They are based on the use of film-forming properties of dispersion polymers of acrylate and vinyl monomers or their copolymers. For example, homopolymer dispersions based on vinyl acetate, vinyl propionate and acrylates; and copolymer dispersions based on vinyl acetate-acrylate (VAc-BuA, VAc-2 EHAJ, vinyl acetate versaitate (VAc-VeOVaj, styrene acrylate, acrylate methacrylate).

In addition to the advantages, dispersion paints and adhesives also have some drawbacks: protection against frost is required and cannot be handled at temperatures below +12 ° C.

The disadvantages are reduced by the dispersion paints based on the aqueous dispersion of vinyl acetate, acrylate or copolymers according to the invention, which contain 10 to 40% by weight of an aqueous dispersion of vinyl acetate, acrylate or copolymers thereof, 0.1 to 0.5 % by weight of chlorides from the group of potassium chloride, sodium chloride, calcium chloride, optionally up to 60% by weight of the fillers from the group of limestone, chalk blanc-ifix, mica, barite, talc and kaolin, optionally up to 30% by weight of white and bright inorganic pigments as well as organic, for example titanium dioxide, lithopone, iron oxides and optionally up to 50% by weight of granulates, for example quartz sand.

The dispersion paints and adhesives according to the invention have a reduced minimum film-forming temperature and consequently an increased frost resistance. Further, by optimizing the pigment and filler components, good theological properties can be achieved. U. dispersion adhesives can be applied in a very thin layer with higher shear strength of the layer. Paints can be applied below +12 ° C, without deterioration of film surface (cracking, cracking even in thicker thickness. At freezing even at -20 ° C, dispersion paints and adhesives produced according to the invention can be used without deterioration of quality parameters and properties.

The solution according to the invention can be seen from non-limiting examples.

Example 1

A dispersion adhesive for bonding PVC and rubber flooring was prepared by dispersing 640 kg of a dispersion of the type of vinyl acetate-2-ethylhexyl acrylate of 55 ^lO / dry matter, 4 kg of calcium chloride, 120 kg of chalk, 120 kg of kaolin, 100 kg of barite, 5 kg of alkyl tin oxide , 10 kg of medical toluene and 21 kg of water. The prepared adhesive was subjected to five cycles at -20 C and ^Q was found to withstand cycles adhesive unchanged spreadability and deterioration in adhesive properties.

Example 2

Dispersion latex paint was prepared by dispersing 430 kg of vinyl acetate-butyl acrylate copolymer type dispersion in 50% dry matter, 1 kg of potassium chloride, 160 kg of anatase-type titanium dioxide, 60 kg of blanc-fix, 90 kg of chalk, 12 kg of monoethyl glycol, 70 kg of kaolin. 2 kg phenylmercurate ® fungicide 250 kg water. The internal dispersion latex paint withstood several cycles of -5 ° C and 3 cycles of -20 ° C, without substantially altering its properties.

Example 3

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The coating composition was prepared by dispersing 320 kg of vinyl acetate-butyl acrylate copolymer type dispersion, 2 kg of calcium chloride, 1 kg of potassium chloride, 90 kg of rutile type titanium dioxide, 43 kg of talc, 80 kg of limestone, 370 kg of glass sand, 2 kg of monoethylene glycol. of pentachlorophenol fungicide and 90 kg of water. The coating composition had the similar properties described in Example 2.

Example 4

The dispersion exterior paint was prepared by dispersing 480 kg of an acrylic dispersion of 50% dry matter, 4 kg of calcium chloride, 155 kg of rutile type titanium dioxide, kg of yellow iron oxide, 70 kg of limestone, 25 kg of kaolin, 50 kg of talc, 35 kg of micronized mica. kg of butyl glycol, 5 kg of 4% (polyacrylic acid ammonium salt solution, 3 kg of 10% sodium hexametaphosphate solution, 3 kg of alkyl tin oxide fungicide and 163 kg of water. Application with outdoor dispersion paint was carried out at +5 ° C and Liquid paint withstands 3 cycles to -20 degrees Celsius without compromising the appearance and mechanical properties of the coating film.

Example 5

The dispersion latex paint universal was prepared by dispersing 400 kg of vinyl acetate-dibutyl maleate dispersion with 52% dry matter, 5 kg of calcium chloride, 160 kg of anatase titanium dioxide, 57 kg of kaolin, 30 kg of chalk float, 40 kg of lithopone, 70 kg of limestone, 3 kg of 25% ammonia, 2 kg of organo-tin-based fungicide, 148 kg of water and 85 kg of additives (wetting agent, thickener).

Example 6

Wallpaper dispersion adhesive prepared by mixing 400 kg of homopolymer polyvinyl acetate dispersion with 50% dry matter, 15 kg carboxymethylcellulose, 2 kg alkyl tin oxide fungicide, 1 kg sodium chloride, 3 kg potassium chloride and 575 kg water.

The dispersion paints according to the invention are intended for surface treatment of concrete panels, panels of lightweight materials, plasters, asbestos-cement surfaces, wood, particle board and fiberboard. The adhesives according to the invention are intended for gluing PVC floor coverings, rubber and textile floor coverings, further for gluing PVC wallpapers and thermal insulating linings made of foam polystyrene.

Claims (1)

Subject Dispersion paint based on an aqueous dispersion of vinyl acetate, acrylate polymers or copolymers thereof and optionally fillers, pigments, chloride salts and granules, characterized in that it contains 10 to 40% by weight of an aqueous dispersion of vinyl acetate, acrylate polymers or copolymers thereof, 0.1 to 0.5% by weight of chlorides from the group of potassium chloride, sodium chloride, chloride of the invention calcium, or up to 60% by weight of fillers from the group of limestone, chalk, blanc-fix, mica, barite, talc and kaolin; inorganic and organic pigments, for example titanium dioxide, lithopone, iron oxides and optionally up to 50% by weight of granulates, for example quartz sand.