SU990324A1 - Method of obtaining decorative coating - Google Patents

Description

(54) METHOD OF OBTAINING DECORATIVE COATINGS

one

The invention relates to the production of decorative coatings based on polymerizable resins using textural papers imitating precious woods, natural finishing stones (marble, granite), etc. It can be used in the manufacture of furniture parts, cases, radio equipment, building materials.

A known method for producing coatings consists in applying a varnish on a substrate and further curing with a stream of accelerated electrons 1.

The disadvantages of this method when using decorative coatings are the incompatibility of the operations of gluing the decorative facing to the substrate and the actual formation of the lacquer surface, as well as the presence of defects in the decorative coating.

The closest to the proposed technical essence and the achieved effect is the method of obtaining decorative coatings, which consists in gluing textural paper on the surface of particleboard or asbestos-cement slabs, applying polyester varnish based on unsaturated polyester resins, its treatment, the texture of varnish coatings and their formation (grinding and polishing).

The disadvantages of this method are also the separate execution of the operations of gluing the texture paper to the product and forming the varnish coating and low labor productivity. High quality of the coating according to this method is achieved by performing laborious operations of enriching the varnish surface by grinding and polishing.

The aim of the invention is to increase the productivity of the process.

The goal is achieved by the fact that 5 according to the method of obtaining decorative coatings, including applying to the chipboard or asbestos-cement plates of textured paper and varnish based on unsaturated polyester resins, followed by its processing, texture paper is pre-saturated with varnish, then applied with polyethylene terephthalate film and treated with flow accelerated electrons with a dose of 8-26 Mrad, after which the film is removed.

The method is carried out as follows.

Lacquer-impregnated texture paper is applied to the slab on a special machine, then a film is applied to the paper immediately, which is combined with the lacquer layer of paper, after which the product enters the electron accelerator where instant curing of the varnish coating occurs, i.e. polymerizing lacquer, as a result of which the operations of gluing texture paper with a slab and forming a decorative lacquer coating are performed simultaneously. The film, cured under the accelerator, is easily removed and can be used as protection against soiling and mechanical damage.

Example I. A layer of polyester soil PE-0165 (TU 6-10-1.740-80) of electron-chemical curing with a flow rate of 60-80 g / m is applied to the prepared surface of a chipboard panel.

Texture paper (TU-81-04-02-76) weighing 100 g / m is cut out according to the size of the backing board, impregnated with PE-284B varnish (TU 6-10-1715-79) of electronic chemical curing and applied to the surface to be finished. products together with polyethylene terephthalate film with a thickness of 30-50 microns. The cured decorative coating is cured by a stream of accelerated electrons with an energy of 40 keV, a current of 12 mA, a dose of 15 Mrad, at a conveyor speed of 3 m / min.

The formed and known coatings have the following characteristics (Table 1).

Example 2. A layer of polyester soil PE-0165 (TU 6-10-1740-80) of electron-chemical curing with a flow rate of 60-80 g / m is applied to the prepared surface from an asbestos-cement plate (GOST 18124-75). Decorative paper is cut to size of the substrate plate. (TU 81-04-02-76) weighing 100 g / m, impregnated with PET varnish to the appearance of the adhesion coating (according to the GOST lattice notch method) Glitter according to the P-reflectoscope, line

284B (TU 6-10-1715-79) electron-chemical curing and applied to the surface of the plate together with a polyethylene terephthalate film with a thickness of 30-50 microns. Curing of the formed coating is carried out as in Example 1.

The formed and known coatings have the following characteristics (Table 2).

Example 3. On the prepared surface of a chipboard, asbestos-cement or gypsum board, a coating is applied as in Example 1. The decorative paper is impregnated with varnishes:

PE-2120, which is a solution of an unsaturated polyester resin in a mixture of TGM-3 oligoester with MGF-9 oligoester with addition of GFK-46 alkyd resin;

PE-246, prefabricated polyethermaleate varnish without inert solvents, chemical curing initiators, accelerators, pop-up additive;

PE-232, semi-finished product 60 wt. h. and TGM3 - 40 wt. h

The cured coating is cured by a stream of accelerated electrons with an energy of 400 keV, a current of 12 mA.

A comparative test result for the coatings for the tested lacquer compositions (for optimal curing doses) is given in Table 3.

The tables show that the characteristic of the decorative coating according to the proposed method corresponds to the requirements for 1st category coatings, and in terms of frost resistance, fire resistance and resistance to water, soap solution and organic solvents exceeds these requirements. Thus, a high-quality decorative coating is obtained when combining the operations of gluing texture paper with the formation of a varnish surface. The economic effect is caused by the elimination of labor-intensive finishing operations of grinding and polishing the lacquer coating.

Table 1 Solid, smooth, smooth, with a mirror shine, 1st category. Edge edge cuts are smooth, no delaminated coating pieces. Indicators Hardness of coating according to M-3, not less than Frost resistance of the coating, h, not less than -30 ° С at -kQ ° C Performance

Requirements for the appearance of the coating 1

Adhesion (by the method of lattice cut, GOST 151 AO-78)

Glitter on the reflectoscope -k, string

Hardness of coating according to M-3, not less

Coating frost resistance, h, not less

at

at -itO ° C

Coating resistance to water, soap solution and organic solvents (acetone, etc.) according to GOST 890it-76

Flammability according to the method of flame spread, GOST GOST 17088-71 s

Solid, equal, smooth, with a mirror shine, 1st category

The edges of the cuts are smooth, there are no peeled pieces of the coating,

ten

ten

0.5

0.5

YU

ten

Resistant to these reagents, the original appearance and color of the coating does not change.

The coating on the asbestos-cement substrate does not apply to flammable materials. Continued table. 1 Characteristics of the coating formed known 0, -10 10 Table 2 Characteristics of the coating of coated areas known

Coating

2120 solid, smooth, smooth with a mirror shine, 1st category

26 15

Claims (2)

1. USSR author's certificate number 606634, cl. B 05 D 7/08, 1976. 2.Turtsky R.S. Imitation wood finishing. M., TSBNTI, 1970, p. II (prototype).