Coating composition

FIELD: chemistry, in particular coating compositions, dyes and colorings.

SUBSTANCE: claimed composition includes resin with curing agent in combination with metal powder and stabilizing additive. More particular composition contains polyester resin or epoxy resin, 40-80 mass % of aluminum, iron, bronze, brass or copper powder with particle size of 25-250 mum, and as stabilizing additives at most 5 mass % of feltproofing additive and at most 20 mass % of thixotropic additive. Composition has high storage stability and useful for coating of any geometry surface.

EFFECT: coatings of high heat conductivity and thickness applicable for mechanical operation.

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The invention relates to the field of chemistry, formulations, paints and dyes for coatings derived from epoxy resins or polyesters containing metal powder or free metal.

Known compositions for coating containing polymer resin with a curing agent and metal powder (for example, JP No. 6212100, C 09 D 5/14, 1994).

The closest analogue of the claimed composition is a composition for coating containing a polymer resin with hardener, metallic powder and stabilizing additives (GB No. 2358868, C09D5/03, 2000).

This little song is adapted for application to the surface by various methods and by virtue of his appointment forms a coating whose properties do not allow subsequent processing to obtain the necessary roughness and thermal conductivity.

The task, which is aimed by the invention, is to provide a composition for decorative coatings and the formation of surfaces with metal-like technological and tactile properties.

The technical result, which can be obtained by carrying out the invention, is to provide properties of the composition necessary for long-term storage, for deposition on the surface of any orientation and education coating is with high thermal conductivity and thickness, suitable for mechanical processing.

The essence of the proposed invention is as follows.

Composition for coating includes a polymer resin with a curing agent in combination with a metal powder and a stabilizing additive. As the polymer resin composition comprises a polyester resin or epoxy resin, and as the metal powder, it contains the powder, which are particles or aluminum, or iron, or bronze, or brass, or copper, while the metal powder has a particle size 25-250 μm, as a stabilizing additive composition contains a combination of antisabotage and thixotropic components in the following ratio, wt.%:

metal powder 40-80

antisodomy component is not more than 5

thixotropic component is not more than 20

polymer resin with hardener else

Ingredients for the composition can be, for example, polyester resin GPI in combination with hardener - catalyst MCR (ethyl ketone peroxide), epoxy resin MEGA 1000 in combination with hardener - catalyst MEGA 500B (catalyst MEGA 500 can be represented as a mixture: Cycloaliphthatic Amines 60-80%; Benzil alcohol 20-25%; Epoxy Polymer Resin DGEBA 0-2%; Salicilic Acid 0-5%). As antisabotage component can be used, for example, hydroecological Benathix (manufacturer Degussa Huls AG, GB Sivento, d-60280, Frankfurt/Main, Germany), properties which ensure the stability of the structure of the suspension when the difference of density of solid and liquid phases is more than seven times. As a thixotropic component can be used Aerosil, for example Aerosil 200 or Aerosil 202 (producer: "Degussa Huls AG, GB Sivento, d-60280, Frankfurt/Main, Germany), the presence of which reduces the viscosity by relative movement of the suspension and the viscosity increase in the absence thereof, thereby preserving the desired thickness of the coating layer on the surfaces in any position.

As the metal powder with a particle size of 25-250 μm valid use of Aluminum 75 or Iron 100 Mesh and powder 200 Mesh bronze, copper or brass. The particle size of the metal powder at the specified ratio of ingredients as optimal for connection with antisodomy and thixotropic components and for forming a coating structure with metal-like and tactile properties.

The composition is prepared by pre-mixing, for example, equal amounts of resin and metal powder, antisabotage component in the amount of 2% of the total mass of the suspension and thixotropic component in the amount of 10% of the total weight of the suspension. The process is carried out at a rotation speed of activator from 1000 to 1400 rpm, when PR is the spans 25-30 min and the temperature of the suspension 40-45° C. the so Formed composition is suitable for long-term storage and transportation homogenized condition with good dispersion of the metal particles, provided their molecular compound with antiphagocytic and thixotropic components. Before applying the composition to the desired surface in the above-mentioned structure add the hardener.

Properties of coatings formed by applying the inventive composition given in the table.

Table
Name of indicator (the content of the ingredient)Features
Metal powder (40-80 wt.%)AluminumIronBrassCopperBronze
Antisodomy component (not more than 5 wt.%)BenathixBenathixBenathixBenathixBenathix
Thixotropic component (not more than 20 wt.%)Aerosil

200
Aerosil

200
Aerosil

200
Aerosil

200
Aerosil

200
Polymer resin with hardener (rest)Polyester, MICRPolyester, MICR Epoxy, MEGA 500VEpoxy, MEGA 500VEpoxy, MEGA 500V
The density of the composition, kg/l1,55-1,63,0-4,5of 3.0-3.5of 3.0-3.5of 3.0-3.5
The solidification time until a gel min at T=25°15-2015-2035-4035-4035-40
The time for complete polymerization, the hour at T=25°24-2824-2828-3228-3228-32
Opacity - the thickness of the coating layer, needed for full coverage color of the base material, kg/m2a 1.6=a 1.73,5-5,33,5-4,03,5-4,03,5-4,0

Composition for coating comprising a polymer resin with a curing agent in combination with a metal powder and a stabilizing additive, wherein as the polymer resin contains a polyester resin or epoxy resin, and as the metal powder, it contains the powder, which are particles or aluminum, or iron, or bronze, or brass, or copper, while the metal powder has a particle size 25-250 μm, and as a stabilizing additives it contains a combination of anticodon is about and thixotropic components in the following ratio, wt.%:

Metal powder 40-80

Antisodomy component is Not more than 5

Thixotropic component is Not more than 20

Polymer resin with hardener Else



 

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