Coating composition

FIELD: chemistry.

SUBSTANCE: composition includes the following component range, weight parts: epoxy diane resine 30.0-60.0; amide-containing acrylic resin 60.0-120.0; polyamine solidifier 15.0-50.0; pigment 22.0-136.0; fillers 57.0-150.0; organic solvent 580.0-900.0. The composition includes condensation products of dimerised fatty acids of vegetable oils with poluethylenepolyamine, as polyamine solidifier. Additionally the composition can contain a mix of dibutylphthalate and tricresylphosphate in amount of 4.4-8.4 weight parts as plasticiser.

EFFECT: improved optic properties of coating; higher hardness, durability, elasticity, burr resistance, light stability, water and heat difference resistance.

5 cl, 2 tbl, 8 ex

The invention relates to the field of coatings on the basis of the plasticized acrylic copolymer and epoxy oligomers containing fillers of various macro-structure, designed for decorative painting of structural elements, devices, aluminum alloys, composite materials and plastics (including elements of the cockpit, panels siteprovides and other details).

One of the important directions of modern materials science is the creation of a decorative matte coatings for painting the inner surfaces of the cockpit, instrument panels and siteprovides with a low coefficient of specular reflection (gloss) coating and higher performance (adhesion, hardness, resistance to scoring, elasticity, strength). Matte coating to ensure comfortable working conditions for pilots.

Known the composition of the enamel with varying degrees of opacity for the decorative colouring of plastics, wood and metal on the basis of copolymers of butyl acrylate, styrene, methacrylic acid, which contains nitrocellulose, plasticizers, pigments, solvents, and as matting additives it contains also acetobutyrate (ed. St. USSR №620497).

The disadvantages of the known enamel are low PR the durability of the coating upon impact, low elasticity in bending, is not sufficiently high optical performance.

Known composition for protective and decorative matte coatings for painting of wooden, glass, metal and plastic articles comprising a copolymer of butyl acrylate, styrene, methacrylic acid and methyl methacrylate, nitrocellulose, plasticizer, pigments, matting additive (ed. St. USSR №896049).

The disadvantages of the known compositions are not sufficiently high impact strength, poor heat resistance and resistance to temperature changes.

Known composition for colouring plastics based on thermoplastic acrylic resin containing reactive Oh-groups, polyurethane resin, acetobutyrate (RF patent No. 2221830).

The disadvantages of the known composition are not sufficiently high optical performance and high enough adhesion to aluminum alloys and organic glasses.

Known composition of the corrosion protective coating, which is used in combination with inorganic coating containing modified epoxy resins, acrylic copolymers, realconsoleonly compound and silicon dioxide as a filler (U.S. patent No. 4407893).

The disadvantages of the known composition are low optical characteristics and low ADH is Zia to polymeric composite materials.

Known composition for coating in which the binder used in the mixture of epoxy resin and acrylic polymer containing polymerized monomers with reactive groups, phenol, polyamines hardener, as well as pigments and fillers, organic solvents (U.S. patent No. 4503174).

The coating has high performance characteristics: adhesion to galvanized steel, weather resistance, resistance to aggressive environments, can be used as anti-corrosion coating for oil equipment, however, has poor adhesion to anodized aluminum alloys, polymer composite materials, and poor optical characteristics.

The closest adopted for the prototype is a composition for coating, which is used to obtain Samarskaya semi-gloss coatings for protection of metal materials and products, including, parts by weight:

(patent RF №2028350).

The coating has high adhesion to metals (steel, aluminum alloys), a sufficiently high chemical resistance and water resistance, however, is not a high optical performance, low hardness and therefore a low resistance to the bully, and low adhesion to polymeric composite materials.

The technical object of the present invention is to provide a composition for coating high optical characteristics, in particular with a low gloss, high performance - high adhesion to aluminum alloys, organic glass, polymer composite materials, high hardness, strength, elasticity, resistance to scoring, light fastness, moisture resistance, resistance to temperature changes.

For the technical solution proposed composition for coatings, including epoxy Dianova resins is, polyamines hardener, pigment, filler and an organic solvent, characterized in that as polyamino hardener it contains condensation products demonizovana fatty acids of vegetable oils with polyethylenepolyamine and further comprises amylostereum acrylic resin in the following ratio of components, parts by weight:

As the pigment composition contains titanium dioxide, carbon technical, pigment lightfastness yellow, pigment blue antrahinonovye, pigment blue phtalocyanines, pigment green phtalocyanines, pigment scarlet red, or a mixture thereof.

As the filler composition contains talc, micro-talc, ground mica, wollastonite, or a mixture thereof.

As the organic solvent composition contains a mixture of acetone, xylene, butyl acetate, butanol and toluene.

To ensure intermolecular plasticization of the polymer matrix composition for ocrite can optionally contain a plasticizer - a mixture of dibutyl phthalate and tricresylphosphate - in the amount of 4.4 and 8.4 parts by weight of

The authors found that during curing of the inventive composition is formed of a two-phase polymer system grid in the grid. When forming a two-phase polymer system, each phase is characterized by a value of the refractive index, which differ from each other. The result is a "muddy" polymer medium, in which when light passes a significant proportion of the luminous flux diffused diffused on the microinhomogeneities in the amount of the coating film. Since the polymer matrix is a "muddy" environment, the set value of the gloss can be obtained at a lower filler content, and eliminates the necessity of special matting additives.

In the proposed composition can be used an epoxy resin with a molecular weight of 800-1500 and mass fractions of epoxy groups of from 6.5 to 12.0%, for example, marks e-41, e-44, e-49 (TU 6-10-607-78, GOST 20824-81, THE 6-10-1347-75, GOST 20).

As amylostereum acrylic resin can be used in a variety aminoadenosine resin, but the best technical result is achieved when using such resins, as resins brands AC, ACH, P-38 with a nitrogen content of 0.9-5.4% and a specific viscosity of 0.5%solution in acetone 0,10-0,20 according to OST 6-01-18-75.

The introduction of the filler on whatnow polymer matrix significantly affects the properties of the hardened coating. The application of the proposed composition of the fibrous fillers (needle) or plate - talc, micro-talc, mica, wollastonite (GOST 21235-78, GOST 879-79, GOST 19284-79, GOST 855-74) - increases physical and mechanical properties, hardness, resistance to the bully (reduced damage), the resistance of the coating and resistance to temperature changes.

To make the coating color composition may contain various pigments, such as titanium dioxide, carbon technical, pigment lightfastness yellow, pigment blue antrahinonovye, pigment blue phtalocyanines, pigment green phtalocyanines, pigment scarlet red, or a mixture thereof (GOST 9808-84, GOST 22699-77, THE 6-14-195-77, THE 6-14-408-76, THE 6-14-408-76, GOST 7885-86).

As the curing agent in the composition are condensation products demonizovana fatty acids of vegetable (linseed, soybean) oils with a polyethylenepolyamine - low molecular weight polyamides brands IN 200, 300 (TU 2224-092-05034239-96, THE 6-10-1279-77).

The inventive composition has high adhesive strength to the protected surface (organic glass, aluminum alloys, composite materials), as well as high hardness, resistance to scoring, good decorative and optical characteristics.

The composition of the protective coating used to protect aluminum alloys, may romanatica in the system with different primer coatings, contains corrosion inhibitors.

Examples of implementation

Example 1.

The composition to obtain a coating was prepared as follows: epoxy Dianova resin and amylostereum acrylic resin was dissolved with stirring in a mixture of organic solvents. After this was added pigments and fillers and dispersively to obtain the desired degree of dispersion. Before applying the resulting intermediate product is injected with a curing agent were mixed and applied to the protected surface.

The technology of obtaining compositions according to examples 1 to 8 is similar to example 1. The compositions of examples 1-8 are shown in table 1.

Of the compounds shown in examples 1-8 were obtained coating thickness of 50-70 microns for samples of aluminum alloy D16AT Roksngr, fiberglass, organoplastic, organic glass. Is defined as the drying time of the coating, the adhesion strength at break, hardness, tensile strength and impact strength in the initial state and after artificial ageing resistance to scratching, optical characteristics. The results are shown in table 2.

As can be seen from table 2, the proposed structure allows to obtain a matte finish with elevated 1.5-2.5 times the adhesion properties, increased by 40-50% hardness, high resistance to scratching and to improve the military physico-mechanical characteristics in comparison with the prototype. The proposed coating is designed for painting products from aluminium alloys, polymer composites, as well as organic glass, which can be used at temperatures ranging from -60 to +100°and can also be used for painting interior surfaces of the cab, dashboard, siteprovides and other details. The application of the proposed composition for matte coating with a low coefficient of specular reflection (gloss less than 5 used) reduces eye strain pilots, increases the comfort of their work and contributes to the improvement of safety. High hardness of the proposed coverage and resistance to mechanical damage can improve the life of the painted devices, and other elements of the aircraft.

1. Composition for coating comprising epoxy Dianova resin, polyamines hardener, pigments, fillers and organic solvent, characterized in that as polyamino hardener it contains condensation products demonizovana fatty acids of vegetable oils with polyethylenepolyamine and further comprises amylostereum acrylic resin in the following ratio of components, parts by weight:

2. Composition for coating according to claim 1, characterized in that the pigments it contains titanium dioxide, carbon technical, pigment lightfastness yellow, pigment blue antrahinonovye, pigment blue phtalocyanines, pigment green phtalocyanines, pigment scarlet red, or a mixture thereof.

3. Composition for pok is itia according to claim 1, characterized in that as fillers it contains talc, micro-talc, ground mica, wollastonite, or a mixture thereof.

4. Composition for coating according to claim 1, characterized in that the organic solvent it contains a mixture of acetone, xylene, butyl acetate, butanol and toluene.

5. Composition for coating according to claim 1, characterized in that it additionally contains a plasticizer is a mixture of dibutyl phthalate and tricresylphosphate in the amount of 4.4 and 8.4 parts by weight of