LT5162B - Undercoat - Google Patents

Abstract

The invention relates to building undercoats. The undercoat is used for smoothing over wood, concrete and plastered surfaces before painting. The new undercoat contains from 8 to 30 percent by weight of latex, from 0,3 to 3 percent by weight of antifoaming agent, from 5 to 20 percent by weight of emulsion dispersion, from 0,5 to 5 percent by weight of preservative and water to 100 percent by weight.

Description

The invention relates to building soils. Used for priming of interior and exterior surfaces of wooden, concrete, plastered, plastered, painted, gypsum board surfaces prior to wallpapering, tiling and carpeting.

The closest solution to the proposed solution by component is a primer comprising (by weight): butadiene copolymer latex 52.3-52.8;

urea-formaldehyde resin 3.8-4.7; zinc white 6.6-6.9; liquid sodium glass 7.37.4; polyvinyl acetate dispersion 8.3-8.5; chromium oxide 1.9-2.1; titanium white 6.6-6.9; ethyl silicate 0.3-0.5; the rest is water (See USSR Authentication No. 2036212, CO9D 109/00).

The main disadvantages of this primer are: poor adhesion to the primed surface, forming an airtight film, the wall cannot "breathe", mold.

Interior decoration requires a deep, "breathable" primer.

The object of the invention is to improve the deep adhesion of the building primer to the primed surface, the permeability to moisture, to achieve a smooth and smooth surface and a good paint adhesion.

The object is achieved by the fact that the building primer, which contains latex, water, also contains anti-foaming agent, emulsion dispersion, preservative, in the following proportion (by weight):

Latex 8-30

Anti-foaming agent 0.3 - 3

Emulsion Dispersion 5-20

Preservative 0.5 -5

Water up to 100

The following materials are used for building primer:

* latex - latex of acrylic styrene copolymer. Latex is an open microstructure material made up of millions of tiny, self-assembled cells with air gaps, which provides good air ventilation and improves soil penetration into the primed surface. Latex is resistant to deformation and aging, hygienic, antibacterial, antifungal material. Latex binds the filler particles to each other to improve the elastic properties of the coating. Optimal content range 8-30% by weight · At lower levels, this effect is not perceptible, and when the amount of synthetic latex is greatly increased, it forms an air and paint impermeable film, increasing the cost of the product.

* anti-foaming agent - the mix does not foam when mixed and primed. It contains 0.3 to 3% by weight.

*,, LT 5162 B emulsion dispersion. Emulsion dispersion reacts with construction latex, improves soil properties, machining, elasticity, flexibility, increases absorption to the primed surface. They take 5-20% by weight.

* Acticide SPX preservative. Preservative extends primer life. It takes between 0.5 and 5% by weight.

Examples of construction soil are shown in Table 1.

table

Components for building soil The amount of components,% by weight, in the samples Synthetic latex 8th 13.5 19th 24.5 30th Anti-dusting 0.3 1 1.7 2.3 3 Emulsion dispersion 5 8.8 12.5 16.4 20th Preservative 0.5 1.6 2.7 . 3.9 5 Water up to 100 up to 100 up to 100 up to 100 up to 100

Construction soil is produced as follows:

75 liters of water, 2 kilograms of anti-foaming agent, 11 liters of emulsion dispersion, 12 liters of synthetic latex, 300 grams of preservative are poured into a plastic container with a stirrer. Mix well until homogenous. Stir for 10-15 minutes. When the mixer is switched off, the mass is visually checked. It must be homogeneous, free of extraneous mechanical and greasy impurities, and free of any signs of rancidity. The mass is then transferred to a grater. A white viscous mass is formed. Construction soil is packaged in plastic containers. The container is hermetically sealed with a lid and placed in polyethylene bags and bound.

The properties of the building soil are determined by tests. It takes 3 bases for each soil sample. The surface to be primed must be solid, dry, free of dust, dirt, grease, grease, wax, old paint residue. Hardened soil does not crack, is hard, smoothes easily, adheres well to the primed surface. It shrinks well when dry, no cracks. Grinding does not break the substrate, does not stain.

table

Sample No. Non-volatile matter content,% Drying time, min. 1 8.91 10th 2 9.00 10th 3 9.00 10th

The present invention improves the properties of the building soil, the adhesion to the plastered plaster surface, the permeability to moisture, water vapor and the elasticity of the elastic. Deep penetration into the primed surface traps residues of plaster, dust and additives. After priming, the surface becomes loose, smooth, has a good adhesion of putty and paint, tile, wallpaper, carpet adhesive. Made from eco-friendly materials, ♦ non-toxic in production and use.

With this primer it is possible to apply a continuous coat 2-3 times, first in the vertical direction, then in the horizontal direction and the third - in the correction of errors. There should be a 3 hour time period between each priming to allow the primer to dry. It is suitable for priming surfaces plastered with cement, lime, gypsum plaster or water-based paints for wall repairs, priming of drywall panels.

Claims (1)

Building subsoil containing latex, water, in that it contains antifoam, emulsion dispersion, by weight (w / w): characterized in that it is a preservative Latex 8-30 Anti-dusting 0.3-3 Emulsion dispersion 5-20 Preservative 0.5 -5 Water up to 100