CS264195B1 - Air Drying Acrylic Resin Coatings - Google Patents

Abstract

The solution concerns paint substances based on air-drying acrylate binders and solves the formulation of paint substances so that they can be universally used for the surface treatment of building structures and roads. Coating substances contain 15 to 50 parts by weight of copolymer acrylic resin obtained by batch polymerization of acrylic and/or methacrylic acid esters with aliphatic alcohol with 1 to 4 carbon atoms and other vinyl monomeps such as styrene and its alkyl derivatives, 0.2 to 1.0 parts by weight of alkylamino salts of polycarboxylic acid, 5 to 35 parts by weight of organic solvents from the group including xylene, toluene, acetone, ethyl and butyl acetate, white spirit, 10 to 70 parts by weight of pigments and/or fillers, preferably talc, kaolin, chalk, titanium white, aluminum stearate, iron oxides, chrome yellow, or 2 to 15 parts by weight of glass ballotin

Description

264195

BACKGROUND OF THE INVENTION The present invention relates to coating compositions comprising acrylate binders drying and / or air. Paints ^ asyeh ^ j '^ c & The yellow color is often produced by the fluorine. phthalates, in this group are included alkyd, nitrocellulose, chloro-rubber, polystyrene, asphalt and the like. The developing group is a coating based on thermoreactive and thermoplastic acrylate binders. The resulting properties of these coatings significantly influence the components used and their mutually proportional ratios.

The great advantage of acrylate coatings is good and fast drying in the case of air-drying binders. In addition, good mechanical properties are attributed to them, the coatings excel in weathering and color temperature stability, good water and detergent resistance, and propellants. In particular, co-polymer binders having a mean molecular weight of between 5,000 and 85,000 are of importance for the processed coatings. The lower M provide films of inferior properties, the higher they make difficulty in spraying paints, paints and enamels with an acceptable coating. By targeting the copolymerization, in the preparation of the binder, it is possible to achieve very good properties which are required for coating agents. The problem with synthetic coatings, such as base-alkali resins that dry oxipolymerized, is the relatively long drying time of the coating films, and the coatings also degrade over time, thereby deteriorating the mechanical properties and color stability of the films. This problem is manifested by the invention, among other applications, e.g. in the application to the roadway, i.e. in its horizontal marking.

The aforementioned drawbacks and difficulties with the application and properties of coatings are eliminated by the present invention, the subject matter of which is acrylic binder coatings further comprising organic solvents, fillers and pigments, additives, or supplementary binders.

The invention is based on the fact that the acrylate resin based coating compositions consist of acrylic resin, organic solvents, pigments, fillers, additives, characterized in that they contain from 15 to 50 parts by weight of co-acrylate resin. polymers of acrylate resins obtained by flow polymerization from esters of acric acid β / or methacrylic with aliphatic alcohol of 1 to 4 carbon atoms and other vinyl monomers such as styrene and its alkyl derivatives, 0.2 to 1.0 parts by weight of alkylolamine salts polycarboxylic acids, 5 to 35 parts by weight of organic solvents from the group consisting of xylene, toluene, acetone, ethyl and butylate, white spirit, 10 to 70 parts by weight of pigments and / or fillers, preferably particulate, kaolin, chalk, titanium dioxide, aluminum stearate, oxides. iron, yellow or 2 to 15 weight parts of glass ballot. The coating compositions of the present invention are characterized by rapid drying to all stages, the versatility of application to various substrates. The resulting coatings are characterized by high surface hardness, excellent adhesion on substrates such as beon, asphalt, plaster, asbestos-cement, wood-fiber and particleboard and generally good mechanical properties. The area where the acrylate binder coating is applied must be dry, well cleaned from coarse dirt, dust, and even oil stains. After application, the coating is left to dry completely, the optimal application temperature is 10 to 30 ° C, the restoration of the paints can be transferred directly to the old layers by spraying or brushing. The films thus produced are resistant to elevated and reduced temperatures, are resistant to salts, which is a preferred property in applied road coatings.

For the preparation of coating substances, known types of pigments, especially oxides of iron, titanium, lead and organic color pigments, are used. In particular, blanc-marker, kaolin, talc, chalk, aluminum stearate, micronised limestone, shale torture, calcium carbonate can be used as fillers. Coating agents of the above-mentioned components can be prepared on all known types of dispersing devices, i.e. on three-cylinder, ball, pearl or sand mills. The production process is completed by homogenisation, after which the coating substance is filled into the packaging. The invention is further illustrated by the following examples. 264195 I.

Universal acrylic gray color

Acrylic Resin A -

Acrylic resin B 40.0

Titanium White -

Kaolin -

Ferric Oxide -

Iron Oxide Black -

Carbon black LTN 0.2

Slate 14.0

Talc 4.2

Chalk 8.0

Litopone 28.0

A1 Stearate 1.0

Alkylolamine amino-polycarboxylic acid 0.6

Butyl acetate -

Xylene -

Toluene 6.0

Some of the properties of the coatings produced by the above examples are summarized in Table 1. The properties of the following ČSN standards are as follows: ČSN 67 3052 Drying of paints 67 3050 Making test tubes II. III. white green 40.0 - - 42.5 20.0 - 14.0 14.0 - 4.7 - 0.5 10.4 —10.0 19.01.0 1.0 0.5 0.5— 10,05,0 8,3 ČSN 67 3061 Coating Thickness Measurement 67 3076 Determination of coating film hardness by pendulum deviceČSN 67 3079 Determination of coating film resistance in bending 67 3085 Coating adhesion T abu 1 'ka 1

Some properties of coating films listed in Annex I. — III. Example

Property I. II. III.

Drying, Stage 1, Minutes 15 12 15 Stage 4, Hours 1.1 1.2 1.2

Pendulum hardness,% after 10 days 28 25 27

AI AI AI Adhesion

Bending resistance, mm 3 3 3

The acrylate resin used in the preparation agents of Examples I to III. are characterized by the properties shown in Table 2.

Table 2

Characteristics of acrylic resins used to prepare acrylate coatings

Properties of Acrylic Resin A B

Viscosity at 23 ° C (mPas) Acid number (mg KOH / g)

Content of non-volatile constituents (%) 920 15.2 51.2 780 14.7 50.2

Claims (1)

S and 204193 ARTICLES Acrylic Resin Coatings comprising an acrylic resin, organic solvents, pigments, fillers, additives, characterized in that they contain 15 to 50 parts by weight of co-polymeric acrylate resin obtained by flow polymerization. from esters of α-crylic and / or methacrylic acid with an aliphatic alcohol of from 1 to 4 carbon atoms and other vinyl monomers such as styrene and its alkyl derivatives, from 0.2 to 1.0 parts by weight of an alkylolamine salt of polycarboxylic acid, from 5 to 35 parts by weight of organic solvents from the group consisting of xylene, toluene, acetone, ethyl and butyl acetate, white benzine, 10 to 70 parts by weight of pigments and / or fillers, preferably talc, kaolin, chalk, titanium white, stearate, optionally 2 to 15 parts by weight of the divided bead. Savorografia, n. P., Plant 7, Most. Price 2.40 Kčs