Composition for priming wood products (variants)

 

(57) Abstract:

The invention relates to compositions for priming art products, mainly from wood, and can be used in the field of folk arts and crafts and art industry, manufacturing decorative articles having on the surface decoration (writing, painting, painting, ornament) paints and enamels. The composition contains, by weight.h.: dibutyl phthalate or dibutylsebacate of 0.002-0.015 g, 50% aqueous polyvinyl acetate dispersion 0,04-0,1, starch 0,1-0,18, water to working viscosity, the second version of the composition, wt.h.: the dibutyl of 0.002-0.015 g, 50% aqueous polyvinyl acetate dispersion 0,04-0,1, linseed oil or linseed oil 0,006-0,012, surfactant OP-7,10 0,0008-0,0012, white spirit 0,009-0,016 water to working viscosity. The technical result - the absence of fracture toughness, properties of the coating under the action of dyes - dyes evenly lay down, the circuit pattern of beads. 2 S. p. f-crystals, 1 table.

The invention relates to compositions for priming art products, mainly from wood, and can be used in the field of folk arts and crafts and art industry, manufacturing decorative is I.

The art of wood products consists of a number of well-known operations for the preparation of products for surface finishing, including: drawing on their surface for supporting different paint materials (primers, putties, varnishes, adhesives, or use for drawing the lower layers of the coating and provides strong adhesion to the painted surface. They help provide transparent coatings and increase the gloss of the coating. Auxiliary materials, creating a layer of surface coating should ensure rapid drying, strength, good hiding power, no swelling, long-term adhesion to peripheral wood and top Lacan and paints, they must meet the sanitary and hygienic materials included in the list permitted for use in food industry and in the decoration of residential and public premises.

There are various formulations for priming wood. The composition on the basis of 50% polyvinyl acetate dispersion (10-25%) in combination with pigments and fillers (15-56%), thickener (cellulose ethers) - (0,1-1%), dispersant (0.1 to 1%), emulsifier (0.5 to 2%), antiseptic (0,1-1%), glycol (1-6%), white soot (5-30%) and water (on the receiving in its composition as an emulsifier, dispersant and sencibilisiruet additive white soot and other chemicals that are not always meet the sanitary and hygienic requirements for products for everyday life.

Known for the primer /Author. with-N 342877, class C 09 D 131/04, 1968/ containing the ratio of ingredients (wt.h.): polyvinyl acetate emulsion 80 - 100, strollerderby latex 10 - 20, rosin 10-15, 50% aqueous solution of liquid glass 2 - 4, urea resin 10 - 25 xylene 1.5 to 2.5; white spirit 15 - 30, surfactant 2.5 to 5. This composition is designed to prepare the surface elements and wood products (chairs, or buildings TVs) under the coating in an electrostatic field; in addition, contains a urea resin.

Known composition comprises (wt.%): aqueous polyvinyl acetate dispersion with a dry residue 88,5 - 99,4, the plasticizer dibutyl phthalate 0.5 to 10 and the target additive is a silicone fluid NGL-11 0.1 to 1.5. The above-mentioned composition due to the presence of silicone fluids do not meet sanitary-hygienic norms, and does not provide the necessary quality of the coating /Author. with-N 505669, class C 09 D 131/04, 1976/.

The well-known "Method of manufacturing hudojestven,15, water of 1.29 to 1.31; 50% aqueous polyvinyl acetate dispersion 0,11 - 0,12, dibutyl phthalate or dibutylsebacate 0,008 of 0.01. On primed surface data structure imposes art painting (cold) water solutions of organic dyes, gouache... and alkyd varnished pentaftalevyh varnish.

Identified as the composition for the coating, in which the mineral binder modified adhesive additive in the form of starch paste /Author. with-N 1558943, class C 09 D 1/00, 1987/.

It is also known the use of dibutyl phthalate as a plasticizer additives /Author. with-N 1629302, class C 09 D 101/16, 1986/.

Known technical solution "waterborne composition for priming wood products" /Patent RF N 2049103, class C 09 D 131/04, 1995/, which is selected as a prototype, as the closest to the claimed composition contains components, wt.h.:

Dibutyl phthalate or dibutylsebacate - 0,008 - 0,01

50% aqueous polyvinyl acetate dispersion - 0,11 - 0,12

Starch - 0,1 - 0,15

Water - 1,29 - 1,31

Regulated tough band of water in the composition, for example, depending on water temperature, especially low, dramatically affects the viscosity of the primer - primer becomes nicecast the government of colors. In addition, when using this water-based composition of the probability of occurrence of cracks on the surface of the finished product.

The purpose of the invention is obtaining a solid surface coating of wood products without cracking, swelling after subsequent coating with dye and varnish to give Shine and preserve the quality of painting.

This goal is achieved by quantitative changes and variant solution composition for priming the surface of the wood products in the following ratio of ingredients (wt.h.):

Dibutyl phthalate or dibutylsebacate - 0,002 - 0,015

50% aqueous polyvinyl acetate dispersion - 0,04 - 0,1

Starch - 0,1 - 0,18

Water - To working viscosity

The second variant of the composition for priming wood products contains the following ratio of ingredients (wt.h.):

Dibutyl phthalate or dibutylsebacate - 0,002 - 0,015

50% aqueous polyvinyl acetate dispersion - 0,04 - 0,1

Linseed oil or linseed oil - 0,006 - 0,012

Surfactant OP-7,10 - 0,0008 - 0,0012

White spirit - 0,009 - 0,016

Water - To working viscosity

Provides scientific and technical analysis of the known prior art has shown, Thu is that it meets the criteria of the invention - novelty, inventive step, industrial applicability, as evidenced by the following description.

The preparation of the primer composition and the drying of wood products in this technical solution is performed as follows.

First prepare plasticized PVA emulsion (variant 1): dibutyl phthalate plasticizer poured into the emulsion PVA and within 0.3 - 0.5 hours intensively stirred, and then use it after 10 - 12 hours

Placed in a container of potato starch with a small amount of water, such as 10%, are thoroughly mixed to a creamy mass. In the mixture pour in the remaining water, heated to a (90 - 100oC), then add the prepared emulsion of plasticized PVA; the components are mixed until a homogeneous mass. Humidity buildings surface should not be more than 10%. Primed products are dried within 24 h after each coating.

On the 2nd variant of the preparation of the primer composition includes operations: plastifitsirovanie polyvinylacetate dispersion - filled PVA dispersion (first container) add dibutyl phthalate and the resulting solution was incubated for 24 h In the prepared second tank restoy capacity, then add surfactant OP-7 or OP-10 and water to working viscosity.

Harvested, dried fabrikat if necessary shpatljujut with subsequent drying and grind. Then it wipe any soft cloth and cover the patented composition. Depending on the wood species, the concentration of ingredients in the coating composition performed twice or three times with drying after each operation at T = 18-20oC. Next, the brand is hand painted and varnished.

In table. 1 shows examples of the claimed compositions with different amounts of ingredients and the parameters of known composition, as well as a comparative evaluation of their properties.

With the increasing content of PVA in water dispersion ill stick to paint, and to cut it cracks the soil layer after coating.

The use of water at a dilution composition of the soil lower temperature (option 1) affects the viscosity of the primer.

In the inventive composition for priming products use standardized components.

The proposed formulations, as follows from the analysis of table.1, satisfy the technological requirements of the quality of the coating, namely the education after drying on the surface of the wood and after lacquer coating, etc., as well as sanitary and technical standards on the nontoxicity of ingredients used artistic and decorative items made of wood. When priming products increases the purity of the preparation of the surface before coating, increases the thickness of the primer layer, which reduces the consumption of lacquer materials.

As a result of use of the claimed technical solution can achieve the enlargement of the range of decorative products due to minor changes known technology primer artistic wood products.

1. Composition for priming wood products, including a 50% aqueous polyvinyl acetate dispersion, starch, dibutyl phthalate or dibutylsebacate and water, characterized in that it contains the ingredients in the following ratio, wt.h.:

Dibutyl phthalate or dibutylsebacate - 0,002 - 0,015

50% Aqueous polyvinyl acetate dispersion - 0,04 - 0,1

Starch - 0,1 - 0,18

Water - To working viscosity

2. Composition for priming wood products, including a 50% aqueous polyvinyl acetate dispersion, starch, dibutyl phthalate or dibutylsebacate and water, characterized in that it contains the NII ingredients wt.h.:

Dibutyl phthalate or dibutylsebacate - 0,002 - 0,015

50% aqueous polyvinyl acetate dispersion - 0,04 - 0,1

Linseed oil or linseed oil - 0,006 - 0,012

Surfactant - 0,0008 - 0,0012

White spirit - 0,009 - 0,016

Water - To working viscosity

 

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