CN1099779A

CN1099779A - Staticelectric conducting powder paint

Info

Publication number: CN1099779A
Application number: CN 94105369
Authority: CN
Inventors: 于延泉
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-05-20
Filing date: 1994-05-20
Publication date: 1995-03-08
Anticipated expiration: 2014-05-20
Also published as: CN1037355C

Abstract

This invention relates to a static conducting powder coating. Various components of the said coating occupying the total wt. respectively are: polyester resin, epoxy resin or polyurethane 55-65%, filler 27-40%, levelling agent 4-5%, and solidifier 3-4%. It features that the above-mentioned coating further contains conducting micro-particle medium occupying 0.15-20% of the total wt., and the said medium may select one of graphite, acetylene black and zinc oxide at option or two of them paired up. This coating can make the film-forming layer have anti-static property on the basis of ensuring antiwear and corrosion-proof properties.

Description

Staticelectric conducting powder paint

The present invention relates to a kind ofly can prevent body surface electrostatic Staticelectric conducting powder paint.

Common electrostatic powder coating generally adopts vibrin, Resins, epoxy urethane resin as the film forming matrix, is being equipped with wear-and corrosion-resistant filler, tinting material, flow agent, solidifying agent, matting agent, toughner etc.By electrostatic power unit, utilize it to radiate 25～65KV static voltage, charged powder particle is coated on workpiece surface, form the corrosion-resistant protective layer of insulation.But consider that from the industrial safety aspect abrasion-proof corrosion-proof layer that above-mentioned electrostatic powder coating forms does not have electrostatic conductive performance,, can cause fearful blast because of the poly-attached a large amount of static charge of film formation surface in some inflammable and explosive occasions.Therefore,, spray the occasion of above-mentioned electrostatic powder, need carry out antistatic treatment, the film forming matrix is had on the good abrasion-proof corrosion-proof performance basis, possess eliminating layer surface electrostatic function powder for needs from security standpoint.

CN88106888.8 has introduced a kind of plastic static coating conductive agent, this conductive agent mainly is applicable in the electrostatic coating with low polar high crystalline plastics as primary coat, to form one deck conducting film, improve electrostatic coating usefulness such as surface of plastic products.Its goal of the invention and the present invention have essential distinction.

As the conducting paint composite that CN89100775.X introduces, said composition is suitable for being applied on non-conducting material and the semiconductor material, makes the antistatic film that is used for electronics and electrotechnics aspect.

Above-mentioned two kinds of conductive agents all are to be used to be coated in the non-conductive medium surface to form conductive coating, be not to be coated on metal material surface as antistatic layer, and above-mentioned conductive agent abrasion-proof corrosion-proof performance also can not show a candle to existing common electrostatic powder, therefore, its material composition and purposes aspect and the present invention are also inequality.

The object of the present invention is to provide a kind of wear resistant corrosion resistant Staticelectric conducting powder paint, this powder coating is to form on the basis at existing common electrostatic powder coating, with addition of some conducting medium particle, makes the film forming matrix of its formation can eliminate the static that the surface forms.

A kind of Staticelectric conducting powder paint, comprise that the urethane resin vibrin or the Resins, epoxy that account for gross weight about 55～65% makes the film forming base-material, be equipped with 27～40% wear resistant corrosion resistant filler again, 4～5% solid flow agent, 3～4% solidifying agent material deliverings are characterized in also containing in the above-mentioned component electrically conductive particles medium that accounts for gross weight 0.15～20%.This conducting medium can adopt graphite, acetylene black, zinc oxide etc., and each conducting medium can Individual existence, also can adopt two or more conducting medium combination collocation to use.Filler of the present invention can adopt titanium dioxide, barium sulfate, zinc sulfide white, talcum powder etc.

The conductivity of above-mentioned Staticelectric conducting powder paint is adjustable, its base-material and one timing of material delivering component content, and the quantity that the electrically conductive particles medium adds is many more, and the conductivity of coating is good more; Vice versa.Can add gross weight 1～5% tinting material for making coating have color.

In order to keep above-mentioned coating to possess the favorable mechanical performance, chemical property and optical property should guarantee to reduce the add-on of electrically conductive particles medium as far as possible under the electrostatic conductive performance prerequisite, usually more satisfactory add-on should be controlled at 0.15～4%, preferably is controlled in 0.15～0.5% scope.

The present invention relatively not only has identical anticorrosion and decorate properties with domestic and international existing common static coating, and main is that the present invention has increased a kind of antistatic property, and the resistivity of leading electrostatic coating can be adjusted according to customer requirements.Electrically conductive particles medium such as graphite, zinc oxide etc. are added in the common electrostatic powder in proportion, utilize electrostatic power unit that powder particle is sprayed on workpiece surface.Then; the workpiece that will be coated with is sent in the process furnace again; when intensification is heated to 60 ℃ of left and right sides; resin begins fusing; in fusion process gradually; electrically conductive particles begins to the coatingsurface drift, and forms the conductive network that electrically conductive particles density is concentrated relatively on the coating top layer, and the electrically conductive particles in the top layer is in contact with one another substantially.Although electrically conductive particles changes with temperature and time in heat-processed, constantly float to the top layer, when temperature reached design requirements, the surface of above-mentioned conductive network can form the transparent corrosion prevention film of one deck high-quality again, and this thicknesses of layers is less than below 10 microns.

This product mainly is applicable to oil, chemical industry, electron trade, can avoid or remove static damage, eliminates because of producing the various unsafe factors that static is hidden.The technology of the present invention performance index:

1. fineness of powder: the 160-180 order is by 99.5%

2. paint film appearance: from unglazed to light is arranged; From smooth to wrinkle, mallear stria, class's line, little to big tangerine line etc.There are multiple color, texture to analyse clearly.

3. condition of cure: 120 ℃-200 ℃, 3-35 minute

4. coating thickness: 30-500 micron

5. gloss: 2%-80%

6. sticking power: 1-2 level

7. shock strength: 45-50KY

8. snappiness: 1-2 millimeter

9. water tolerance: it is intact to soak 1000 hours paint films.

10. resistance to salt water: 500 hours no changes of 5% sodium chloride solution room temperature.

11. oil-proofness: it is intact that 20# machine oil soaks 400 hours paint films.

12. acid resistance: it is intact that 5% sulphuric acid soln soaks 240 hours paint films.

13. alkali resistance: it is intact that 5% sodium hydroxide solution soaks 300 hours paint films.

14. resistance value: 10-10 ⁸Ohm

Introduce the several specific embodiments of the present invention below.

Embodiment 1

A kind of Staticelectric conducting powder paint, its each component concentration is respectively:

1. vibrin 30%, Resins, epoxy 35%, zinc sulfide white 10%, titanium dioxide 5%, flow agent 5%, pigment 5%, electrically conductive particles 10%.

Being suitable as workpiece surface for anticorrosion decorates.

Embodiment 2

Another kind of Staticelectric conducting powder paint, its each component concentration is respectively:

2. Resins, epoxy 55%, barium sulfate 30%, titanium dioxide 10%, flow agent 2%, electrically conductive particles 3% are fit to the workpiece corrosion-resistanting decoration.

Embodiment 3

A kind of Staticelectric conducting powder paint that is suitable for outdoor coated use, its each component concentration is respectively:

3. poly-resin 60%, solidifying agent 8%, flow agent 7%, barium sulfate 15%, pigment 3.5%, titanium dioxide 6%, the electrically conductive particles 0.5% of touching.

Claims

1, a kind of Staticelectric conducting powder paint, essentially consist comprises that the urethane resin vibrin that accounts for gross weight 50～65% or Resins, epoxy are as the film forming base-material, be equipped with 27～40% filler, 4～5% flow agent, 3～4% solidifying agent again, be characterized in also containing in the said coating component electrically conductive particles medium that accounts for gross weight 0.15～20%.

2, powder coating according to claim 1 is characterized in that said electrically conductive particles medium material is graphite, acetylene black, zinc oxide, and can select that wherein one or more are arranged in pairs or groups mutually for use.

3, powder coating according to claim 1 and 2 is characterized in that the content of said electrically conductive particles medium is generally 0.15～4%, and measuring is 0.15～0.5%.