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Composition for water-based electric heating nano paint, water-based electric heating nano paint as well as preparation method and application of water-based electric heating nano paint

A nano-coating and composition technology, applied in the direction of conductive coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problems of poor adhesion, high cost, easy to fall off, etc., to increase compatibility, develop Stable heat and good heat resistance

Active Publication Date: 2015-11-04
MATERIAL & IND TECH RES INST BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the electrothermal coatings successfully developed by coating companies such as Acme chemicals & Insulating in the United States, RDF Shielding LT (RFS) in the UK, and Showa Denko in Japan, etc., have the disadvantages that the heating temperature of the coating is not high, it is easy to fall off, and the conductive filler is easy to oxidize. Cracks often appear in the structure of the coating and the coating, which leads to problems such as deterioration of the quality of the coating during use
Domestic electric heating coatings are mainly made of precious metal fillers, synthetic resins and various additives through mechanical mixing. Due to a series of problems such as high cost of raw materials and poor properties, their actual use is restricted; in addition, in The inorganic electrothermal coating developed by a silicate research institute in Tianjin, which is a leading domestic company, is difficult to be widely used because of its poor adhesion, complicated film forming process and high curing operating temperature.

Method used

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  • Composition for water-based electric heating nano paint, water-based electric heating nano paint as well as preparation method and application of water-based electric heating nano paint
  • Composition for water-based electric heating nano paint, water-based electric heating nano paint as well as preparation method and application of water-based electric heating nano paint
  • Composition for water-based electric heating nano paint, water-based electric heating nano paint as well as preparation method and application of water-based electric heating nano paint

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Experimental program
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Embodiment approach

[0025] The inventors of the present invention found in the process of research that by using the aqueous dispersion containing carboxylated modified carbon nanotubes and the aqueous dispersion containing graphene in combination, the dispersibility and electrical conductivity of the coating obtained can be improved. , stability, adhesion, etc. can be significantly improved. Therefore, according to a preferred embodiment of the present invention, the aqueous dispersion containing conductive nanoparticles includes an aqueous dispersion containing carboxylated carbon nanotubes and an aqueous dispersion containing graphene. Wherein, in the coating composition, the aqueous dispersion containing carboxylated carbon nanotubes and the aqueous dispersion containing graphene also exist separately. Preferably, in order to facilitate the proportioning and use, each component in the coating composition is stored according to a certain ratio, for example, in terms of the conductive nanoparti...

preparation example

[0066]Aqueous dispersion containing carbon nanotubes 1: 10 g of multi-walled carbon nanotubes were subjected to ultrasonic treatment, the temperature of the ultrasonic treatment was 25° C., the frequency was 53 KHz, and the time of ultrasonic treatment was 15 minutes. Then disperse the treated multi-walled carbon nanotubes in 400ml mixed acid solution (concentrated sulfuric acid:concentrated nitric acid=3:1)), heat in a water bath for 6h, carry out carboxylation modification, graft hydrophilic soluble groups, and then ultrasonically disperse , the temperature of ultrasonic treatment is 25°C, the frequency is 53KHz, and the time is 30min. The modified carbon nanotube powder is obtained after centrifugal sedimentation, separation and drying. Take 10g of the modified carbon nanotube powder and add 0.95g of hexadecyltri Methyl ammonium bromide and 189.05 g of water were used to prepare a 5% carbon nanotube dispersion. Then, the dispersion liquid was ultrasonicated for 30 min under...

Embodiment 1

[0071] This embodiment is used to illustrate the water-based electrothermal nano coating of the present invention.

[0072] Add 30g of water, 1.2g of dispersant SN5027, 1.2g of wetting agent BYK180, 0.8g of defoamer BYK1610 into the stirring tank, and use the amine neutralizer DMAE to adjust the pH value of the resulting mixture to 8 at a speed of 300rpm After stirring for 10 minutes, add 10 g of conductive carbon black and 10 g of non-conductive titanium dioxide, and stir for 2 hours at a speed of 2000 rpm, then put the material into a conical mill for grinding, and adjust the fineness to less than 50 μm. After grinding, add 60g water-based polyurethane resin (), 1.0g dispersant SN5027, 0.6g defoamer BYK024, 4.4g film-forming aid Texanol, 0.6g rheological additive RM8W, 30g aqueous dispersion containing graphene 1, 50g The aqueous dispersion 1 containing carbon nanotubes was stirred at a speed of 1200 rpm for 30 minutes and then discharged to obtain the electrothermal nano-co...

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Abstract

The invention discloses a composition for water-based electric heating nano paint. The composition comprises water-based resin and a water dispersion containing conductive nano particles; the water dispersion containing the conductive nano particles is a water dispersion containing hydroxyl modified carbon nanotube or a water dispersion containing graphene, or the water dispersion containing the conductive nano particles comprises a water dispersion containing the hydroxyl modified carbon nanotube and a water dispersion containing graphene. The invention also discloses water-based electric heating nano paint as well as a preparation method and application thereof. The water-based conductive heat-conduction nano paint can be used for solving the defects in the prior art that the oil organic resin is used as a bonding agent and the organic solvent serving as the solvent is harmful to the environment; meanwhile, the adhesive force is better, the resistance rate is lower, the heating is faster, the heating amount is higher, and the heating performance is more stable.

Description

technical field [0001] The invention relates to the field of conductive heat-generating coatings, in particular to a composition for water-based electro-heating nano-coatings, a water-based electro-heating nano-coating and a preparation method and application thereof. Background technique [0002] Electrothermal paint is a new type of functional material with excellent electrothermal properties developed on the basis of conductive paint. When this type of resistive material is energized, the coating can generate Joule heating. As a new type of functional coating, electrothermal coating has broad application prospects. For example, it can be used for indoor and outdoor heating of buildings, and can be made into self-controlling electric heating tables, electric water heaters, and industrial medium and low temperature baking furnaces, etc. fields have important practical value. [0003] At present, the electrothermal coatings successfully developed by coating companies such ...

Claims

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Application Information

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IPC IPC(8): C09D5/24C09D163/00C09D133/00C09D175/04
Inventor 孙华杰古月文志孙金梅刘艳荣李卓
Owner MATERIAL & IND TECH RES INST BEIJING
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