SU821478A1 - Water-dilutable paint-varnish composition - Google Patents

Description

t. The invention relates to water-borne paint materials and can be used for coatings on metal and primed surfaces. A number of water-borne paint materials for metal including alkyd are known, for example, a primer, which is a suspension of pigments and fillers in an alkyd resin solution and water-borne curing resins in a mixture of volatile limited solvents with the addition of surfactants 11. 43 I J. J However, this primer contains a large amount of vegetable oils, it has a high drying temperature (180 and forms coatings with insufficient hardness and protective properties. The technical primer is closest to the proposed primer, as well as water-soluble alkyd resin. the basis of malein mixture of flax and dehydrated castor oil, treated with etrio, the hardener is phenol-formaldehyde bmola VBFS-4, pigments, solvents, defoaming agent, i import additives, which increase filling and appearance. Dangrunt It has the following ratio of components, wt.%: Low-molded mixture of flax and dehydrated castor oil, treated with etriol (50% solution in butyl celloslose) Hardener - VBFS-4 phenol-formaldehyde resin (52% solution in butyl cellosol); Knopko D-470 Soot Titanium dioxide Microbart Microtalc Butylcellosolve Butyldiglycol Distilled water Imported additive to improve the appearance - Silicone PL {10% solution in butylcellosolve) | Methyleethanol {4-l Drainer Additive: This primer is intended for anticorrosion protection of automotive engine parts 2. However, this primer forms coatings at a high () drying temperature, which causes high electrical costs for drying coatings on its basis. For the application of the edge coating in wider areas. it has inadequate hardness, glas and saltiness. In addition, this primer contains 6oj7b a second amount of scarce and expensive vegetable oils and organic solvents that are irretrievably lost in the process of film formation, pollution of the atmosphere, worsening the sanitary and hygienic conditions of labor and creating a fire and explosion hazard in paint shops. The purpose of the invention is to increase the hardness and adhesion, improve the gloss and protective properties, reduce the drying temperature of coatings based on the composition- as well as reduce the consumption of vegetable oils and reduce the amount of organic solvents. The goal is achieved by the fact that a water paint JJ Em is a paint and varnish composition comprising a water-soluble alkyd resin, a hardener, pigments and solvents, and additionally contains an ether with a molecular weight of 18000–2000 based on a styrene copolymer with maleic anhydride and a combination of heart patterns and heart patterns. and synthetic fatty acid fraction C - (b

-sn-cng-en-ene .. - / where R is the alkyl radical of an alcohol; n is the degree of co-limping. In tab. 1 presents the main indicators of the ether. Table Hard, prozra Appearance, dark-colored glassy mass Color of 50% aqueous solution in acetone by iodometric Not more than 60

en

he.

g in the following ratio, wt.%: Waterborne alkyd resin Ether with a molecular weight of 18000-20000 based on a copolymer of styrene with maleic anhydride and monohydric alcohols fraction Hardener Pigments Ester of monoethanolamine. and synthetic fatty acids (Broc0, 5-2.0 CPI Os1; | oval. Solvents. An alkyd resin can be any water-borne alkyd resin, such as hard-to-dissolve pentaphthalic resin, modified linseed oil, or a maleised mixture of flax and dehydrated castor oils treated with etriol, and as a hardening agent, water-borne phenol-formaldehyde resin, hexamethoxymethylmelamine, water-dilutable urea-or melamine-formahyde resin. Styrene-maleic anhydride copolymer ether m and monohydric alcohols is a synthetic product manufactured by copolymerization of styrene with maleic anhydride and subsequent esterification of an alcohol copolymer. The composition of the ester is expressed by the chemical formula I Continuation of the table.1 Acid number, 200-230. mg KOH / g Melt temperature less than 80, С 18000-20000 Molecular weight Volatile content Not more than 10 substances,% Ether well soluble in organic solvents (acetone, dioxane, alcohols), as well as in aqueous solutions of nitrogenous bases. The use of the monoethanolamine ester of the synthetic fatty acid fraction in the paint and varnish composition can be represented by the chemical formula „

OI

JR-C-K-tiHz-CjHlj-O-d-R.

H

where R is the alkyl radical of a synthetic fatty acid.

The ester is obtained in the laboratory when in xylene in the presence of a catalyst at the next mol5: nominal ratio of monomers — myoethanolamine: synthetic fatty acids 1: 2.

8 quality pigments for || "eyut, titanium dioxide, carbon black, xpOKfaT. strontium, micrbarbit and microtal as solvents-butyl celzole and water.

Preparation, the compositions are produced in three stages.

1. Preparation in a high-speed mixer of prescription quantity of alkyd resin, organic solvent: solids and pigments. Stirring into those

hour until a homogeneous mass.

2. The dispersion of the resulting paste in a bead mill to a degree, milling 20-30 microns.

3. Loading into the mixer of the rubbed mouth, hardener, ester of styrene copolymer with maleic anhydride and odioate alcohols, monoethanol ester and synthetic fatty acids, the remaining amount of solvents. Stirring the finished composition for an hour.

To reduce foaming during the application and manufacture of a paint and varnish composition, in particular when dispersing in a bead mill, antifoaming agents — silicone fluids — may be added to it.

The finished paint composition, previously diluted with water to the desired viscosity, is applied by dipping, pneumatic spraying or pouring.

Examples of the proposed compositions in comparison with the known are given in table. 2

5 Table 2

. 26.3 20

- - 25

0.75

.19.42 20 7.6

0.4 0.6 0.4

4.58 19.4 1, 49 - 2.0

0.08 - 0, 4 - 1, 75 -.

- 30.0

thirty

9.6 0.4 9.6

20.0

Hardeners:

a) hexamethoxymethylmelamine,

b) melamine formaldehyde resin

c) phenol formaldehyde resin

Ester of monoethane olamine and synthetic fatty acid fraction-С

Solvents: Properties of the proposed compositions in the appearance of the coating Visually

Duration of drying up to degree 3 (min) with

140 ° C

The degree of transition in 3D,%

Hardness of coating

Adhesion points

Bend, mm

Continuation of table 2

BO

10.0

4.0

2.86

1.2

0.5 2.0 30 compared with the known are given in table. 3. T a b litsa 3 Film Ditch-Film Film The film is even, uniform, even, single, homogeneous / homogeneous, homogeneous in native, Lumatov, gl, Hlintsev Hlintsev GOST Impact strength, 4765-73 kgf / cm GOST Resistance to water action 21065-75 (up to change :), days Resistance iP to action of 3% solution of hlrna atri (before change). Same day, - - Resistance to effect of mineral oil, condition of the coating after testing for 10 days Resistance to the action of gasoline, condition of coating after testing for 10 days of GOST Satisfied 10686--3 9 user MI 12 Properties of the proposed Note and. e coatings based on its bag at 180 C. From tab. 3 shows that using as a film-forming agent in a water-borne alkyd resin paint composition in combination with styrene-maleic anhydride ester copolymer ether and monohydric alcohols of CY-00 fraction, as well as introducing Mono-ethanol ester to synthetic fatty acid fractions, allows lowering the temperature su) ti to 140 ° C, which leads to a decrease in the euergosis at dusk. At the same time, the gloss of the coating increases, the hardness increases 1.5–2 times to 1.5 times the salt resistance, and the oil resistance and adhesion of the coatings to the metal significantly improve. The proposed composition does not require the use of special additives to improve the filling and the external type and makes it possible for it to contain more water due to partial replacement of organic solvents, as a result of which fire risk and the amount of | emissions and the sanitary and hygienic conditions of labor are improved. In addition, the introduction of a synthetic composition into a recipe, ru. Continuation of table 3. Coating grind without changing; Without changing without changing dovlet-Satisfactory. Satisfy / ritual. Dryer compositions are given after drying at 140 ° C, and the known composition, after that, an ester of styrene copolymer with maleic anhydride reduces the amount of oil-containing alkyd and, thus, saves scarce vegetable oil. SUBSTANCE: water-soluble paint composition comprising water-soluble alkyd resin, hardener, pigments and solvents, characterized in that, in order to increase hardness and adhesion, improve the gloss to cystic properties, reduce the drying temperature of the coating on its base, reduce the drying temperature of the coating on its base. It also contains ether with a molecular weight of 18000-20000 on the basis of styrene with maleic anhydride and monohydric alcohols fractions and complex oils. ester of monoethanolamine and synthetic fatty acids of the C iff-C fraction with the following ratio of cops, 1% by weight. Water-soluble alkyd resin 20-30 Ether with a molecular weight of 18000-20000 on an os11821 new styrene copolymer with maleic anhydride and monohydric alcohols of fraction C G 10-30 Opener 1 through 1-10. Pygmy. 10-40 Monoethanolamine and synthetic fatty acid ester 478 12 fractions Su, -C, 0.5-2.0 Solvents Else Sources of information taken into account during the examination 1. Primer V-ML-0143. 5 W € -10-1532-76, /, 2. Primer WML-0160. Technological regulations I 1-2-78 (protot p).

Claims (1)

Claim A water-borne paint composition comprising a water-borne alkyd resin, hardener, pigments and solvents, characterized in that, in order to increase hardness and adhesion, improve gloss and protective properties, reduce the drying temperature of the coating based on it, reduce the consumption of plant oil and reduce the amount of organic solvents, it additionally contains an ether with a molecular weight of 18000-20000 based on styrene soyalimer with maleic anhydride and monohydric alcohols of the C_-C ^ fraction and a monoethacol ester ming and synthetic fatty acids of fraction C _1O -C ^ with the following ratio of components] wt.% Water-borne Alkyd * Resin 20-30 Ether with a molecular weight of 18000-20000 based on os11 821478 12 is a newer styrene copolymer. with maleic anhydride and monohydric alcohols fractions With _t -C $ Hardener Pigments Monoethyl ester- 10-30 1-10 10-40 iolamine and synthetic fatty acids fraction C _yy- C _kb 0.5-2.0 Solvents Else