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INVENTION
Patent of the Russian Federation RU2268275

WATER-DISPERSED PAINT-AND-PAINT COMPOSITION

The name of the inventor: Potemina Tatyana Fedorovna (RU); Vladimir Borisovich Manerov (RU); Pokrovskaya Nina Anatolievna (RU); Kukoleva Julia Vasilyevna
The name of the patent holder: Closed Joint-Stock Company "Scientific Production Company Yarli" (ZAO NPK Yarli)
Address for correspondence: 150044 , Yaroslavl, Polushkina Grove, 16, ZAO NPK Yarli, General Director VB Manneru
Date of commencement of the patent: 2003.12.04

The invention relates to paint materials intended for primer coating, as well as as an independent coating. A water-dispersion paint composition comprising an acrylate-containing dispersion, pigments including strontium chromate and zinc phosphate in a ratio of 1: 10-50, a thickener-polyurethane and cellulose and / or acrylic, a surfactant, coalescing additive, biocide additive, A corrosion inhibitor, water and further comprises a fluorine-containing additive for pouring, and additionally may contain a neutralizer, a defoamer and an antifreeze agent. The technical result is an increase of adhesion to aluminum, water resistance, acceleration of drying in natural conditions.

DESCRIPTION OF THE INVENTION

The invention relates to coatings for coatings and can be used in the oil, gas, power, chemical and other industries to protect the surface of structures made of ferrous and non-ferrous metals that are operated under normal and high humidity conditions.

Known is a water-dispersion paint composition comprising a water-borne binder, pigments, neutralizing base, defoamer, thickener, corrosion inhibitor, surfactants, coalescing additives, biocide additive, water (Primer VD-AK-0247, technological instruction YF 60-429- 98).

However, it has insufficient adhesion to the wet surface, is not resistant to the action of lubricating-cooling liquids and contaminants.

The closest to the invention is a paint composition comprising an acrylate-containing dispersion, an epoxy resin-based emulsion, pigments, including strontium chromate and zinc phosphate in a ratio of 1: 9, a coalescing additive, a biocide additive, a surfactant, a corrosion inhibitor, a thickener , Water [pat. RF №2154079, publ. 10.08.2000. Bull. No. 22].

However, it has insufficient adhesion to aluminum, water resistance, slowly dries up under natural conditions.

The object of the present invention is to increase adhesion to aluminum, water resistance, and acceleration of drying under natural conditions.

The above object is achieved by the introduction of a water-dispersion paint composition comprising an acrylate-containing dispersion, a thickener, pigments, including strontium chromate and zinc phosphate, a corrosion inhibitor, a biocide additive, a coalescing additive, a surfactant, water, an additional fluorine- As a thickener - simultaneously polyurethane and cellulose and / or acrylic, and using chromate of strontium and zinc phosphate in a ratio of 1: 10-50, respectively, with the following ratio of components, mass%:

The water-dispersion paint composition can additionally contain a neutralizer in an amount of 0.1-0.5% by weight, a defoamer in an amount of 0.1-0.5% by weight, an antifreeze in an amount of 2.5-6.0% by weight.

As the acrylate-containing dispersion, a Lacroten E-24 styreneacrylic dispersion manufactured by PKF Orgkhimprom, Dzerzhinsk, an acrylic dispersion of Maincote HG-56 from Rohm and Haas, Holland, an acrylic modified with Versandic acid esters of Finndisp RSD-20 from Forcit, Finland, and others Any acrylic, styrene acrylic and modified acrylic dispersions.

As acrylic and / or cellulosic thickener, water-soluble acrylic-based copolymers are used, in particular an aqueous dispersion of a copolymer of butyl acrylate and methacrylic acid of the brand Lacryl 41 (TU 2241-008-39251899-69), acrylic latexes based on ethyl acrylate grades "Polifob 9832", " Polyphob TR-117 "by Union Carbide, sodium carboxylcellulose (Na-CMC) TU 6-55-40-90, hydroxyethyl cellulose, for example, Natrosol 250 HR and 250 HBR brands (Hercules firms) and others.

As a polyurethane thickener, water-soluble polymers based on modified polyurethanes are used, for example, Acrisol RM 1020 and Acrysole RM-8 from Rohm and Haas, hydrophobically modified polyurethane resin of the brand Laprol DZ (Russia) and others.

Pigments are titanium dioxide (GOST 9808-74); Pigment red iron oxide (TU 6-10-1618-77); Carbon technical; Zinc phosphate; Chromate of strontium; Omiocarb, which is calcium carbonate (not less than 98%) from Omia; Kaolin (GOST 19608-84); Talcum powder (TU 6-21-25-201-77); Mica (СМСП-10- ТУ 572510-001-31894267-02); Mica ground for the rubber industry (GOST 855-74) and others.

As a corrosion inhibitor, a zinc-containing complex salt of the brand SER-AD-FA-179 from Servo, Germany; Sodium nitrite, sodium benzoate and others.

Coaling agent is butylglycol (TU 6-01-648-78); 2,2,4-trimethyl-1,3-pentadiol mono-isobutyrate (Texanol), methyl-diglycol and others.

As an antifreeze, ethylene glycol (GOST 10136-77), di-ethylene glycol (GOST 10136-77), propylene glycol and others are used.

As the surfactant, oxyethylated alkylphenols are used, for example, OP-7 or OP-10 auxiliary (GOST 8433-81), Triton CF-10 from Union Carbide, sodium or ammonium salt of Orotan 731K polycarboxylic acid (35%) (f Rohm and Haas, Orotan 165 (21%) (Rohm and Haas); Sodium polyphosphate (GOST 20291-86) and others.

Fluorinated surfactants, for example FC-171 or FC-129, are used as the fluorine-containing filler. 3M, modified by fluorinated hydrocarbon neutralized polyacrylate m. Efka 3570, f. Efka Holland and others.

As a biocide additive, substances based on tetramethyl thiurium disulfide of the brand Thiuram D (GOST 740-76) based on isothiazoline and halogenated alkanol derivatives of the Metatin brand K 520 l. Acima, Switzerland; Based on 2-n-octyl-4 isothiazoline of the brand Skeyn 8 (Rohm and Haas) and others.

As a defoamer, defoamers based on polysiloxane BIK-022, BIK-024, based on a mixture of aliphatic hydrocarbons and emulsifiers of Foamaster NXZ brand, F.Cognis, Germany and others are used.

The paint composition according to the invention is prepared as follows:

1. Prepare a semi-finished pigment paste in a mixer by dissolving surface-active substances, a thickening agent, a biocide additive and, if necessary, a neutralizing base.

2. Prepare kneading pigment paste in a high-speed mixer by loading a semi-finished product for the pigment paste, pigments and, if necessary, a defoamer and antifreeze and stirring to a homogeneous mass.

3. The pigment paste is dispersed in a bead mill.

4. Prepare a semi-finished acrylate-containing dispersion in a mixer by loading with constant stirring an acrylate-containing binder, coalescing additives, thickeners and, if necessary, a defoamer and mixing to a homogeneous mass.

5. The water-dispersion paint composition is composed by adding a semi-finished product of acrylate-containing dispersion, pigment paste, corrosion inhibitor, fluorine-containing filler to the mixer under constant stirring.

The composition is applied by brush, roller, paint sprayer. Examples of the composition according to the invention are given in Table 1, the properties of the coatings are given in Table 2.

As can be seen from the table, the proposed composition has better adhesion to aluminum, water resistance and drying in natural conditions compared to the known one.

CLAIM

1. A water dispersion paint composition comprising an acrylate-containing dispersion, a thickener, pigments, including strontium chromate, zinc phosphate, a coalescing additive, a corrosion inhibitor, a biocide additive, a surfactant, water, characterized in that it is, as a thickener, simultaneously Contains a polyurethane thickener and cellulosic and / or acrylic, strontium chromate and zinc phosphate are used in a ratio of 1: 10-50, and further comprises a fluorine-containing additive for pouring at the following component ratio, by weight:

2. The water-dispersion paint composition according to claim 1, characterized in that it additionally contains a neutralizer in an amount of 0.1-0.5% by weight.

3. The water-dispersion paint composition according to claims 1 and 2, characterized in that it additionally contains a defoamer in an amount of 0.1-0.5% by weight.

4. The water-dispersion paint composition according to claims 1 to 3, characterized in that it additionally contains an antifreeze in an amount of 2.5-6.0% by weight.

print version
Date of publication 01/18/2007

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