CN1112592A - Electrothermal coating material - Google Patents
Electrothermal coating material Download PDFInfo
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- CN1112592A CN1112592A CN 94106064 CN94106064A CN1112592A CN 1112592 A CN1112592 A CN 1112592A CN 94106064 CN94106064 CN 94106064 CN 94106064 A CN94106064 A CN 94106064A CN 1112592 A CN1112592 A CN 1112592A
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Abstract
The present invention relates to an electrothermal coating material, containing (by weight portion): 60-120 portions of graphite, 60-160 portions of water-glass or varnish, 20-120 portions of water or turpentine, 0.5-35 portions of titania and 0.5-20 portions of diantimony trioxide. Said invention can be applied to the inorganic base materials, such as cement, glass, metal, ceramic and asbetic tile, etc. or to the organic base materials, such as wood, paper, cloth and plastics, etc., and made into the electrothermal coating layer. Said invention is easy to prepare, low in cost, good in resistance stability, high in binding strength, not easy to peel off, long in service life, and has the good anti-arc and antioxidation functions.
Description
The invention belongs to electrical heating element and material, particularly a kind of electric-heating coatings.
Chinese patent discloses a kind of electric-heating coatings No. 92106309, and it comprises (by weight): carbon dust 30～95, flake lac 2～25, thinner 50～300.When manufacturing, adopt flake lac as disperseing and jointing compound, other can directly brush on base material after adding thinner, brushing thing seasoning and become the resistance heating coating.Its deficiency is: when base material was inorganic materials, bond effect and sticking power were all not satisfactory; At its heating temp is under 30～100 ℃ of conditions, and easily oxidation is aging and influence work-ing life, the more incompatible operating mode that is higher than below 100 ℃.Particularly when local electric current was excessive, this coating easily produced electric arc or spark, and safety also is unsuitable for brushing at combustible base material such as plank, on the cloth inadequately.
First purpose of the present invention is to avoid above-mentioned the deficiencies in the prior art, and a kind of electric-heating coatings is provided, and it not only has good bond effect and antioxidant property, and heatproof, arc protection and spark, long service life.
Second purpose of the present invention provides a kind of electric-heating coatings, and it all can form firm combination, difficult drop-off for inorganic or organic basis material.
Technical solution of the present invention is: a kind of electric-heating coatings, comprise (meter) by weight: graphite 60～120, water glass or varnish 60～160 are made the water or the rosin 20～120 of thinner during preparation, titanium dioxide 0.5～35, antimonous oxide 0.5～20.
And, when base material is inorganic materials such as metal, cement, glass, pottery, asbestos plate, can adopt water glass to do the adhering and solidifying agent, the component content of also making its coating of dilution is (meter by weight): graphite 60～100, water glass 60～160, make the water 20～60 of thinner during preparation, titanium dioxide 1～35, antimonous oxide 0.5～20.
When base material is organic materialss such as timber, paper, cloth, plastics, varnish is adopted in the adhering and solidifying agent of coating, thinner adopts rosin or lacquer thinner, its component content is (meter by weight): graphite 60～120, varnish 60～140 is made the rosin 80～100 of thinner, titanium dioxide 0.5～20 during preparation, antimonous oxide 0.5～20, silicone oil 1.5～40.
As conduction, exothermic material, its resistance is subjected to coat-thickness with graphite, the influence of the fineness of Graphite Powder 99 etc., and the change in resistance amplitude is bigger, is difficult to adjust.Adding titanium dioxide can improve the conductivity of material, and resistance trimming effect is preferably arranged, and can improve the antioxidant property of graphite simultaneously.The adding of antimonous oxide plays the arc protection effect.When coating for various reasons, excessive at certain local current, generate heat when too high, the antimonous oxide in the coating can improve conductivity, avoids producing arc-over in the coating or electrical spark produces.The effect of silicone oil mainly is to make coating at high temperature be difficult for igniting, and to increase fire prevention, keeps away the combustion effect.Other is noted that when other component was constant, the resistance value of electro-thermal coatings reduced with the increase of content of graphite; Increase with content of titanium dioxide raises.
The invention has the advantages that:
1, adhering and solidifying intensity height, sticking power is big, can form firm combining, difficult drop-off with base material.
2, antioxygen property is good, the thermo-efficiency height, and the temperature control temperature adjustment is convenient, long service life, resistance stability is good.
3, arc protection, electrical spark are effective, safe and reliable, and power supply is not had particular requirement, and interchange, direct current or high pressure, low pressure all can be used, also applicable on the flammable organic substrates such as timber, paper.
4, with low cost, make simply, advantages of nontoxic raw materials, pollution-free, non-corrosiveness, applied widely.
The invention will be further described below in conjunction with embodiment.
When base material was inorganic materials, the component content of each embodiment can be as following table (by heavy umber):
Press embodiment one～five described component proportioning, (be finely powdered at technical pure graphite, titanium dioxide, antimonous oxide, granularity is 80 to 100 orders) mixture in add entry and water glass, mix, can adopt brushing, spray, stencil, mode such as blade coating prepares on base material, coating thickness is generally 0.05～1 millimeter, and coated area can require measuring and calculating resistance value (W=V according to heating power
2/ R) decide.Coating preparation after dry naturally or 40 ° of-80 ℃ of oven dry get final product, connects copper sheet on the coating two end plates on base material, copper mesh or lead, and switching on promptly begins to generate heat.For safety generally on coating surface, also to be coated with one deck insulation, heat-resistant coating (as heatproof insullac etc.).The electric-heating coatings that the present invention prepares as stated above has good physicochemical property.With base material is that metope is an example, in the metope in 14 square metres of rooms, spray 3 square metres of coating of the present invention, the surface is coated with insullac, the about 900～1000W of its electric power, connecting 220V power supply rear surface temperature can reach about 80 ℃, if reach as high as 300 ℃ after adjusting, room temperature is risen 10 ℃, do not have puncture, dodge the road through withstand voltage test 50HZ1500V/min, insulation resistance＞500M Ω, thermo-efficiency reaches more than 90%.Reach work-ing life more than 20,000 hours.
When base material was organic materials, the component content of each embodiment can be as following table (meter) by weight:
Press embodiment six～ten described component proportionings, the preparation method of electro-thermal coatings and base material be inorganic materials roughly the same, varnish, rosin or lacquer thinner and silicone oil place of water and water glass need only be got final product.With base material is that layered board is an example, makes electro-thermal coatings as stated above on layered board, and promptly heatable behind the connection 220V power supply, the general heating temperature is below 100 ℃, and thermo-efficiency reaches more than 90%, and the withstand voltage test result is the same, reaches work-ing life more than 20,000 hours.
Claims (3)
1, a kind of electric-heating coatings is characterized in that containing (meter) by weight: graphite 60～120, water glass or varnish 60～160 are made the water or the rosin 20～120 of thinner, titanium dioxide 0.5～35, antimonous oxide 0.5～20 during preparation.
2, electric-heating coatings according to claim 1, it is characterized in that: when base material is inorganic materials, the component content of its coating is (meter by weight): graphite 60～100, water glass 60～160, make the water 20～60 of thinner during preparation, titanium dioxide 1～35, antimonous oxide 0.5～20.
3, electric-heating coatings according to claim 1, it is characterized in that: when base material is organic materials, the component content of its coating is (meter by weight): graphite 60～120, varnish 60～140, make the rosin 80～100 of thinner during preparation, titanium dioxide 0.5～20, antimonous oxide 0.5～20, silicone oil 1.5～40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94106064 CN1112592A (en) | 1994-05-26 | 1994-05-26 | Electrothermal coating material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94106064 CN1112592A (en) | 1994-05-26 | 1994-05-26 | Electrothermal coating material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1112592A true CN1112592A (en) | 1995-11-29 |
Family
ID=5032359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94106064 Pending CN1112592A (en) | 1994-05-26 | 1994-05-26 | Electrothermal coating material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1112592A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109337415A (en) * | 2018-09-21 | 2019-02-15 | 佛山市摩陶新材料科技有限公司 | A kind of electromagnetic heating coating and preparation method thereof |
-
1994
- 1994-05-26 CN CN 94106064 patent/CN1112592A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109337415A (en) * | 2018-09-21 | 2019-02-15 | 佛山市摩陶新材料科技有限公司 | A kind of electromagnetic heating coating and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |