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INVENTION
Patent of the Russian Federation RU2286367

POLYMERIC PAINT-AND-PAINT COMPOSITION

The name of the inventor: Marchenkov Andrey Vladimirovich (RU); Askadsky Andrey Alexandrovich (RU); Goleneva Lidiya Mikhailovna (RU); Kurskaya Elena Anatolievna (RU); Askadsky Alexander Andreevich (RU); Murachev Sergey Nikolaevich
The name of the patent holder: Institute of Organoelement Compounds. A.N. Nesmeyanov RAS (RU); Ltd. "Eugene R" ("Jujin R") engineering plastics
Address for correspondence: 119991, Moscow, GSP-1, B-334, st. Vavilova, 28, INEOS RAS them. A.N. Nesmeyanov
Date of commencement of the patent: 2005.09.29

The invention relates to the field of polymeric paint and varnish materials, in particular to coating compositions based on polycarbonate. The polymer coating composition contains 12.0-14.0 parts by weight. Polycarbonate on the basis of bisphenol A with a molecular weight of 26000-36000, 1.5-4.2 parts by weight. Polymeric adhesive, as a plasticizer, 0.12-1.4 parts by weight. Acrylonitrile-butadiene-styrene copolymer, 0.6-26.0 parts by weight Mineral filler selected from the group of mineral fine materials: aluminum powder, titanium dioxide, alkaline earth metal salt, talc, microvollastonite, 0.1-1.4 parts by weight A dye selected from a series of phthalocyanine dyes or colored mineral pigments, 0.001-0.01 parts by weight. A surfactant, polyoxyethylene sorbitan monooleate (Tween 80), and the balance is a chlorinated aliphatic solvent. The technical result consists in the creation of a quick-drying polymer in a natural environment of paint and varnish composition that allows to obtain randomly painted coatings on various building materials without deterioration of adhesion.

DESCRIPTION OF THE INVENTION

The invention relates to coating compositions, namely to polymer paint materials, specifically to polycarbonate coating compositions.

These materials can be most successfully used to obtain weatherproof protective and decorative coatings on the surfaces of products made of wood, metal, concrete and other surfaces located both inside and outside the premises.

Painting coatings based on polycarbonates are characterized by increased light and moisture resistance and low hygroscopicity. They are distinguished by high mechanical properties, dielectric properties that persist in a wide temperature range from very low negative temperatures to 190-200 ° C, resistance to acids, oxidizers and detergents. Polycarbonate is considered a physiologically safe polymer due to the lack of biological activity of itself and any components extracted from it (Smirnova OV, Erofeeva SB Polycarbonates, Moscow: Chemistry, 1975, 288 pp.).

It is known to use polycarbonates to produce films and coatings. However, the chemical structure of aromatic polycarbonates, and especially on the basis of bisphenol A, causes high rigidity of the resulting films and their low adhesion to surfaces in the production of protective coatings under normal conditions. Therefore, in order to increase the adhesion of the polycarbonate coatings to the substrates, either a surface chemical modification of the films or a high-temperature method for creating polycarbonate coatings on metal surfaces is used, involving mandatory heating of the articles to a temperature exceeding the polycarbonate melting temperature, i.e. 260-280 ° С (Schnell G. Chemistry and physics of polycarbonates, Moscow: Chemistry, 1967, 229 pp.).

A composition used for the production of plasticized polycarbonate-based films, comprising an aromatic polycarbonate, a plasticizer-polyethoxyamine (2-50% by weight of polycarbonate), and methylene chloride as a solvent are known [Pat. USA No. 3070563, US C1 524/244 (1962)].

A disadvantage of this composition is the need for a preliminary synthesis of a plasticizer - polyethoxyamine from ethylene oxide and a quaternary alkyl amine, and a long time (24 hours) for the plasticization of polycarbonate films. The possibility of using this composition to obtain protective coatings of various surfaces is not discussed.

A highly-filled thermoplastic composition containing an aromatic polycarbonate, a polyalkylene terephthalate resin as a plasticizer is known, and pigments and mineral additives in the form of salts and metal oxides that are used to produce articles by thermoextrusion (Pat. USA No. 5510398 US C1 523/171 (1996), MKI6 C 09 D 5/29).

However, this composition, because of its consistency, is not intended to create decorative protective coatings on surfaces.

A polymer composition is known for creating a protective coating on concrete and reinforced concrete structures based on furan-containing products - furfural wastes. As an epoxy resin resin (30 parts by weight) with polyethylene polyamine (30 parts by weight) as a resin binder, a flexible butadiene-nitrile rubber as a plasticizer and an organic solvent (acetone) are used as a polymeric binder [Pat. RF No. 2045561, C1 6 C 09 D 171/14 (1991)].

A disadvantage of this composition is that at this ratio of resin and hardener, the composition becomes unstable when stored due to the curing process. Therefore, the curing agent is added to the composition immediately before use to form the coating. The possibility of using this composition to obtain protective coatings on other different surfaces is not discussed.

The composition closest in terms of essential features to the claimed composition is 1 wt. Polycarbonate, 9 parts by weight Methylene chloride and 10 parts of Diethylphthalate as a plasticizer [Japanese Patent No. 21446, nat. Cl. 24 Н 21 (1965), РЖХ. 16 С 779 П (1967)], chosen as a prototype. It is a primer composition. It is used only for preliminary, liquid priming of metal surfaces. A protective polycarbonate coating with high adhesion to the metal is created in the second stage by spraying the powdered polycarbonate onto the primed surface and then baking it at 240-350 ° C.

The disadvantage of this composition is its limited use only for the purpose of priming the surface; The coating formed from it has no adhesion to any materials. Another disadvantage is the complexity of the technology of curing the polycarbonate coating in the second stage of its formation and the high energy intensity of the process. The composition can not be used to produce quick-drying coatings on other common but less heat-resistant building materials by the usual method of application. Therefore, its use is limited to the creation of coatings only in a two-stage method of high-temperature powder technology, and if it is necessary to obtain painted surfaces, it is necessary to use high-temperature resistant dyes, the set of which is not large.

It is an object of the present invention to provide a naturally drying, volatile polymer paint composition based on an aromatic polycarbonate which allows the randomly painted coatings on various building materials to be obtained in one step without deteriorating the adhesion by applying the composition in conventional ways followed by brief air drying. In addition, the coatings obtained are highly weather resistant in combination with good decorative properties and high adhesion to wood, metal, concrete, slate and other building materials over a wide temperature range, and thus the claimed composition can be successfully used to create internal and external protective -decorative coatings.

The objective is achieved by the fact that a polymer paint composition comprising an aromatic polycarbonate, a plasticizer and a chlorinated aliphatic solvent, the quality of the aromatic polycarbonate comprises a bisphenol A polycarbonate with a molecular weight of 26,000-36,000, as a plasticizer, an acrylonitrile-butadiene-styrene copolymer, and Contains a polymeric adhesive, a mineral filler selected from the group of mineral fine materials: aluminum powder, titanium dioxide, alkaline earth metal salts, talc, microvolastonite; A dye selected from the series of phthalocyanine dyes or color mineral pigments, and polyoxyethylene sorbitan monooleate (Tween 80) as a surfactant with the following component ratio, mass parts:

The composition uses an aromatic polycarbonate based on bisphenol A with a molecular weight of 26,000-36,000, TU P-262-63.

As a polymeric adhesive, the composition contains epoxidane resin ED-20 or ED-22 (GOST 10587 76) with hardener polyethylene polyamine (TU 6-02-594-80) in a weight ratio of 100: 7 (parts by weight).

The composition as a polymer adhesive contains polyvinyl acetate (GOST 18992-80) or a universal polymer adhesive based on polyvinyl acetate resin with the trademark "NACET-S" (Producer - Poland) with a polymer binder content of 37% by weight.

As a high-molecular plasticizer, acrylonitrile-butadiene-styrene copolymer (ABS polymer), TU 6-05-1587-84 is used.

As a fine mineral filler: titanium dioxide (GOST 19808-84), barium sulfate, calcium carbonate, talc with dispersed particle sizes up to 30 nm, and (or) microvollastonite (MB-10-94, GEOKOM, Russia) with The maximum particle size is 100 nm, and (or) aluminum powder (GOST 5494-95).

Phthalocyanine dyes (blue 1510 and green G-7, Jayscolor GFP, China) or colored mineral pigments are used as colorants: yellow lightfast (Jayscolor Y01, China), orange pigment (Jayscolor OR 05, China), iron oxide pigments (GOST 18172- 80 or TU 6-10-602-86).

Surfactant is polyoxyethylene sorbitan monooleate (Tween-80 "FERAK" FRG).

As the solvent, chloroform or a mixture thereof with methylene chloride is used in any proportions.

The essential difference between the claimed paint and varnish polymer composition and the prototype is that it contains a polymer adhesive which gives it a high adhesion to various building materials; As a plasticizer, it contains an acrylonitrile-butadiene-styrene copolymer and additionally a mineral filler, a dye and a surfactant, which corresponds to the criterion of novelty.

The composition is prepared by successively mixing the constituent components and then applying it to the painted surface in any known way: by pneumatic spraying, by irrigation, dipping, using a paint roller or brush. If it is necessary to reduce the viscosity, the composition can be further diluted with a chlorinated aliphatic solvent. Before applying the compositions to the steel surface, the latter, after normal stripping and degreasing, was treated with a phosphatizing rust cleanser "NEFFOS" (TU 21490072 - 00203938 - 2001), OAO "APATIT". Curing of the composition with the formation of a lasting coating occurs when the applied layer is dried in air under natural conditions for 15-20 minutes.

The conditional viscosity of the proposed composition was determined on a viscometer B3-246 with a nozzle diameter of 4 mm at a temperature of 20 ± 0.5 ° C (GOST 8420-74).

Hiding power is expressed in the number of grams of material required to cover an area of ​​1 m ² .

Adhesion of the coating was determined by the method of lattice incisions in points 24 hours after application of the composition to the test surfaces.

Specific compositions of the claimed compositions and the method for their preparation are given in the following examples and in the table.

Example 1 . 77 g of chloroform are poured into the mixer and 13 g of aromatic polycarbonate are added with stirring; Stirring is continued for several hours until the polycarbonate is completely dissolved at room temperature or for half an hour while heating the solution. Then 2.60 g of an epoxy resin and 0.182 g of polyethylene polyamine as a hardener are added thereto with agitation (corresponding to a weight ratio of 100: 7). To the resulting solution, 0.005 grams of Tween-80 and 0.65 g of a copolymer of acrylonitrile-butadiene-styrene in 6 g of chloroform are added with stirring. Separately, the phthalocyanine dye 0.65 g, 1.3 g of titanium dioxide and 0.65 g of barium sulphate are carefully triturated, the mixture is diluted with 3.5 g of a solvent and added to the polymer composition with stirring for 5-10 minutes, after which the product is poured In a tightly closed container. To obtain a coating, the composition is applied to the surface by any method. Curing of the coating takes place by natural drying in air for 15-20 minutes.

Example 2 . According to the method described in Example 1, a solution of 13 g of an aromatic polycarbonate in a mixture of 30.0 g of chloroform and 30.0 g of methylene chloride is prepared. Separately, a solution of 3.9 g of polyvinyl acetate in 16.0 g of chloroform is prepared and introduced into a solution of an aromatic polycarbonate. To the resulting solution, 0.005 g of Tween-80 and 0.39 g of a copolymer of acrylonitrile-butadiene-styrene in 3 g of chloroform are added with stirring. Further, according to the method described in Example 1, 1.0 g of TiO ₂ , 10.0 g of microvollastonite and 0.3 g of a yellow lightfast pigment in 3.0 g of chloroform are introduced and mixed for a further 10 minutes.

Example 3 . According to the method described in Example 1, a solution of 12 g of an aromatic polycarbonate in 70 g of chloroform is prepared. Separately with stirring, 4.0 g of NACET-S glue containing 1.5 g of polyvinyl acetate is diluted with 8 g of chloroform and injected into the solution of said polycarbonate. To the resulting solution, 0.001 g of Tween-80 and 0.12 g of a copolymer of acrylonitrile-butadiene-styrene in 3.0 g of chloroform are added with stirring. With continued stirring, add 0.6 g of aluminum powder and 0.1 g of blue phthalocyanine dye, mix for 5 minutes.

In Examples 7, 8, 9, characteristics of compositions obtained outside the claimed composition are given, from which it can be seen that a change in the ratio of constituent components beyond these limits impairs the processing properties of the composition due to a change in the optimum viscosity indexes and reduces the quality of the applied coatings by decreasing the adhesion value and deterioration Hiding power.

In Example 9, the amount of polyethylene polyamine with respect to the epoxidane resin is increased to 10: 100 (parts by weight). Such a composition is unstable upon storage, since After 15-20 days a gel is formed due to the intensive curing of the epoxy resin in the presence of an excessive amount of hardener. This gel floats to the surface of the composition, breaks its technological properties and makes it unsuitable for use.

The claimed composition makes it possible to obtain quick-drying in the natural conditions of white or painted in any color coatings in just one step by applying by conventional methods, followed by drying in air for 15-20 minutes. Coatings have a high adhesion to the surface of most building materials in comparison with the prototype. The use of the claimed composition makes it possible to substantially simplify the technology of obtaining colored coatings, to reduce energy consumption and to increase the economy of production. The proposed composition is stable in hermetic storage conditions for at least one year without changing the technological properties.

Tests of coatings applied to steel, concrete, slate (composition 4) and to steel, concrete, slate, wood surface (composition 5), were carried out after holding the samples under natural climatic conditions for 1.5 years, including two winters. The results showed that the coatings have a long (more than 1.5 year) resistance to weathering and climatic temperature changes combined with good decorative properties. Therefore, the proposed polymer paint composition can be used to create internal and external protective decorative coatings.

Thus, the claimed polymer paint composition exceeds the prototype for a wider range of its practical use and allows to obtain coatings on any building materials without limitation in their thermal stability and more accessible and widely accepted application methods. The proposed composition is stable during storage in hermetic conditions for at least one year without changing the technological properties.

The present invention is also directed to the utilization of articles made of polycarbonate and its waste generated during the processing of the polymer, for example, in the form of a flake.

CLAIM

A polymer paint composition comprising an aromatic polycarbonate, a plasticizer and a chlorinated aliphatic solvent, comprising as an aromatic polycarbonate a bisphenol A-based polycarbonate having a molecular weight of 26,000-36,000, as a plasticizer comprising an acrylonitrile-butadiene-styrene copolymer, and And further comprises a polymeric adhesive, a mineral filler selected from the group of mineral fine materials: aluminum powder, titanium dioxide, alkaline earth metal salts, talc, microvollastonite; A dye selected from the series of phthalocyanine dyes or color mineral pigments, and polyoxyethylene sorbitan monooleate (Tween 80) as a surfactant with the following component ratio, mass parts:

2. A composition according to claim 1, characterized in that the epoxy resin resin with a polyethylene polyamine hardener in a weight ratio of 100: 7 is used as the polymer adhesive.

3. A composition according to claim 1, characterized in that the polymer adhesive is polyvinyl acetate or a polyvinyl acetate based polymer adhesive with the trade mark "NACET-S".

print version
Date of publication 01/18/2007

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