CN105838203A - Preparing method for high-temperature-resistant heat conducting water-based insulating paint - Google Patents

Preparing method for high-temperature-resistant heat conducting water-based insulating paint Download PDF

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Publication number
CN105838203A
CN105838203A CN201610308344.8A CN201610308344A CN105838203A CN 105838203 A CN105838203 A CN 105838203A CN 201610308344 A CN201610308344 A CN 201610308344A CN 105838203 A CN105838203 A CN 105838203A
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China
Prior art keywords
insulating paint
heat
based insulating
water
preparation
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CN201610308344.8A
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Chinese (zh)
Inventor
梁亮
陈龙
李文
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GUANGZHOU HUAYU CHEMICAL CO Ltd
Guangdong University of Technology
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GUANGZHOU HUAYU CHEMICAL CO Ltd
Guangdong University of Technology
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Priority to CN201610308344.8A priority Critical patent/CN105838203A/en
Publication of CN105838203A publication Critical patent/CN105838203A/en
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D167/02Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18Fireproof paints including high temperature resistant paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/65Additives macromolecular

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention relates to a preparing method for high-temperature-resistant conducting water-based insulating paint, and belongs to the technical field of chemistry painting preparation. The preparing method includes the concrete steps that 10-40 parts of heat conducting filler and 10-30 parts of water are dispersed in a high-speed dispersion machine for 0-1 h, and 30-50 parts of water-based polyester dispersion, 1-10 parts of a curing agent, 0.1-2 parts of an anti-settling agent and 0.1-2 parts of a thixotropic agent are added and fully mixed at low speed, and stand for defoaming to obtain the water-based high-temperature-resistant insulating paint. The preparing method is simple in process and low in cost, and the prepared water-based insulating paint is high in heat resistance and heat conductivity, excellent in insulating property and wide in application range.

Description

A kind of preparation method of thermostable heat-conductive water-based insulating paint
Technical field
The present invention relates to the preparation method of a kind of insulated paint, be specifically related to the preparation method of a kind of environment-friendly type thermostable heat conduction water-based insulating paint, belong to chemistry painting industry preparing technical field.
Background technology
Insulated paint plays an important role in ensureing the operation of motor, security appliance, is one of key factor determining motor, electrical apparatus technology economic indicator.F class B insulation paint refers to heat resisting temperature insulated paint more than 155 DEG C, is not only the crucial insulating materials that large power generating equipment is supporting, and significant to improving motor, electrical apparatus technology economic indicator.
Motor, electrical equipment heat exchange pattern based on convection current, convection heat transfer' heat-transfer by convection is relevant with the thermal conductivity of material, and insulating material of polymer is little due to phonon free path, and thermal conductivity factor ordinarily be about 0.2 W/ (m K), poor thermal conductivity.But the motor winding of different insulative grade has different permission temperature rise values, if having exceeded setting, the use of motor will be affected, can motor damage time serious.Therefore the thermal conductivity of insulating materials is the decisive factor of restriction electrical machinery life, and the development of High-heat-conductiviinsulation insulation material is the key technology improving electric efficiency.
The most rarely seen about the patent of environment-friendly type aqueous insulating heat-conductive high-temperature resistant coating.Domestic patent relates to the patent of heat conductive insulating and also has been reported that, if CN103881566 A, CN102559048 A etc. are with oiliness epoxy modified silicone resin as matrix resin, add heat filling and prepare heat conduction high-temperature insulating paint, but this coating is solvent-borne type insulated paint scope, containing substantial amounts of volatile solvent, do not meet the discharge standard of low VOC.And a lot of insulated paint heat conductivilitys in the market are poor, in the electrical equipment and electrical course of work, to accelerate insulated paint aging for thermal accumlation, the most accidents caused.
Summary of the invention
The present invention is directed to the problem that prior art exists, it is provided that the preparation method of a kind of environment-friendly type thermostable heat conduction water-based insulating paint, make the product of preparation have higher heat resistance, thermal conductivity and outstanding insulating properties, applied range.
In order to solve the problems referred to above, the technical solution adopted in the present invention is:
The preparation method of a kind of thermostable heat-conductive water-based insulating paint, comprises the steps:
Prepare aqueous high-temperature-resistant heat conductive insulating paint: disperseed 0-1 hour by the hydromining high speed dispersor of 10-40 part heat filling and 10-30 part, add waterborne polyester dispersion 30-50 part, curing agent 1-10 part, anti-settling agent 0.1-2 part and thixotropic agent 0.1-2 part low speed to be sufficiently mixed, stand froth breaking, prepare aqueous high-temperature-resistant heat conductive insulating paint.
Above-mentioned heat filling is the composition of one or more of aluminum oxide, aluminium nitride, boron nitride, silicon nitride, carborundum, zinc oxide;
Above-mentioned heat filling is carborundum, zinc oxide;
Above-mentioned anti-settling agent is the composition of one or more of carboxymethylcellulose calcium, hydroxymethyl cellulose, polyamide wax, aerosil;
Above-mentioned thixotropic agent is aerosil;
Above-mentioned described curing agent is full methyl etherified melamine HMMM.
The invention has the beneficial effects as follows:
(1) the technology of the present invention solves insulated paint environmental protection, low VOC requires to take into account insulation, heat conduction, resistant to elevated temperatures performance issue simultaneously, and the insulated paint of preparation has low VOC, superior isolation, high temperature resistant, the performance of heat conduction.The condition of cure of this insulated paint is only 130 DEG C/40min, and paint film adhesive force on iron plate is 1 grade, and hardness is 3-4H, water-fast, acidproof, alkaline resistance properties is good;Paint film 500V voltage lower volume resistivity be 3.76 × 1011 Ω m, humidity index (T20000) 168.3 DEG C;Paint film thermal conductivity factor can reach 1.570W/m K, improves about 7 times compared to matrix resin heat conductivility.
(2) insulated paint prepared by the inventive method is a kind of novel environmental friendly green product; it it is the general insulating materials of F, H level; be applicable to transformer, motor, circuit board, wiring board, enamel-covered wire, the dipping of capacitance kind or application, have protection against the tide, dispel the heat, insulate, the effect such as fixing and protection.
Accompanying drawing explanation
The preparation flow figure of Fig. 1 aqueous high-temperature-resistant heat conductive insulating paint;
The TG curve map of Fig. 2 embodiment 2 thermostable heat-conductive water-based insulating paint paint film.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention will be further described in detail, and these embodiments are only used for the present invention is described, do not limit the scope of the invention.
Embodiment 1
The preparation method of a kind of thermostable heat-conductive water-based insulating paint, comprises the steps:
(1) under the protection of nitrogen, the terephthalic acid (TPA) of 100g and the cyclohexanediol of 80g being added the catalytic antimony trioxide 0.1g, 160 DEG C of reactions obtain esterifying liquid in 4 hours;Esterifying liquid reacts at 200 DEG C under the protection of nitrogen and obtains PEPA oligomer in 4 hours, and this oligomer vacuumizes the PEPA obtaining big molecule for 2 hours at 200 DEG C;Big molecule PEPA reacts 1 hour at 160 DEG C with 1g acid anhydrides and obtains the big molecule PEPA with carboxyl;Adding the organic solvent propylene glycol monobutyl ether of 5%wt in the big molecule PEPA with carboxyl, being then neutralized to pH value with triethylamine is 7.0, obtains waterborne polyester aqueous dispersion.
(2) first aluminum oxide and the 10g hydromining high speed dispersor of 10g are disperseed 1 hour, add 30g waterborne polyester dispersion, 0.1g full methyl etherified melamine HMMM, 0.1g carboxymethylcellulose calcium, 0.1g aerosil low speed are sufficiently mixed, stand froth breaking, prepare aqueous high-temperature-resistant heat conductive insulating paint.
Embodiment 2
The preparation method of a kind of thermostable heat-conductive water-based insulating paint, comprises the steps:
(1) under the protection of nitrogen, the terephthalic acid (TPA) of 100g and the cyclohexanediol of 120 g being added the catalytic antimony trioxide 1g, 200 DEG C of reactions obtain esterifying liquid in 1 hour;Esterifying liquid reacts at 240 DEG C under the protection of nitrogen and obtains PEPA oligomer in 1 hour, and this oligomer vacuumizes the PEPA obtaining big molecule for 1 hour at 240 DEG C;Big molecule PEPA reacts 0.5 hour at 180 DEG C with 15g acid anhydrides and obtains the big molecule PEPA with carboxyl;Adding the organic solvent propylene glycol monobutyl ether of 5%wt in the big molecule PEPA with carboxyl, being then neutralized to pH value with triethylamine is 8.0, obtains waterborne polyester aqueous dispersion.
(2) first aluminum oxide and the 30g hydromining high speed dispersor of 40g are disperseed 0.1 hour, add 50g waterborne polyester dispersion, 1g full methyl etherified melamine HMMM, 2g carboxymethylcellulose calcium, 2g aerosil low speed are sufficiently mixed, stand froth breaking, prepare aqueous high-temperature-resistant heat conductive insulating paint.
Embodiment 3
The preparation method of a kind of thermostable heat-conductive water-based insulating paint, comprises the steps:
(1) under the protection of nitrogen, the terephthalic acid (TPA) of 100g and the cyclohexanediol of 100g being added the catalytic antimony trioxide 0.5g, 180 DEG C of reactions obtain esterifying liquid in 2 hours;Esterifying liquid reacts at 220 DEG C under the protection of nitrogen and obtains PEPA oligomer in 2 hours, and this oligomer vacuumizes the PEPA obtaining big molecule for 1.5 hours at 220 DEG C;Big molecule PEPA reacts 1 hour at 170 DEG C with 10g acid anhydrides and obtains the big molecule PEPA with carboxyl;Adding the organic solvent propylene glycol monobutyl ether of 5%wt in the big molecule PEPA with carboxyl, being then neutralized to pH value with triethylamine is 7.5, obtains waterborne polyester aqueous dispersion.
(2) first aluminum oxide and the 20g hydromining high speed dispersor of 20g are disperseed 0.5 hour, add 40g waterborne polyester dispersion, 0.5g full methyl etherified melamine HMMM, 1g carboxymethylcellulose calcium 1g aerosil low speed is sufficiently mixed, stands froth breaking, prepares aqueous high-temperature-resistant heat conductive insulating paint.
Embodiment 4
The preparation method of a kind of thermostable heat-conductive water-based insulating paint, comprises the steps:
Equipped with in four mouthfuls of burnings of thermometer, agitator, condenser pipe, nitrogen protection device and vacuum extractor, 30g M-phthalic acid, 20g terephthalic acid (TPA), 32g neopentyl glycol, 10g trimethylolpropane, the catalytic antimony trioxide 0.2g are disposably put in four-hole bottle.When being warmed up to 140 DEG C, material starts to melt, and starts agitator stirring at low speed, after being warmed up to 160 DEG C, heats up per half an hour 10 DEG C, until temperature reaches 230 DEG C, continues esterification to system and reaches articulation point (becoming water white transparency shape), stop being passed through nitrogen.Open vacuum distillation apparatus, the little molecular product generated during slowly decompression removes polycondensation reaction and water, survey acid number at set intervals, when being reacted to acid number less than 10mgKOH/g, stop reaction, cool to 180 DEG C, add 8g trimellitic anhydride, insulation 40min, stops heating when sampling detecting acid number is about 50mgKOH/g.It is cooled to 140 DEG C, adds 20g propandiol butyl ether and reduce viscosity, treat that temperature is down to 80 DEG C and is added in amine and reaction 20min, add 230g water, fully dispersed, obtain the translucent waterborne polyester emulsion of pH7.0-8.0.
20g carborundum/zinc oxide composite heat-conducting filler and 20g water are disperseed 30min at high speed dispersor 5000r/min, it is subsequently adding 50g waterborne polyester dispersion, 8g water-compatible amino resin curing agent, 0.8g anti-settling agent, 1.0g thixotropic agent and appropriate corrosion inhibiter low speed to be sufficiently mixed, stand froth breaking, preparing aqueous high-temperature-resistant heat conductive insulating paint, its preparation flow is shown in accompanying drawing 1.
By coatings on the iron plate polished, 40min film-forming at 130 DEG C, coating thickness is about 10 m, and the paint film adhesion of gained is 1 grade, hardness 5H, paint film are 1.42 × 10 in 500V voltage lower volume resistivity11Ω m, humidity index (T20000) 150.3 DEG C, paint film thermal conductivity factor is more than 1.0W/m K.
Embodiment 5
The preparation method of a kind of thermostable heat-conductive water-based insulating paint, comprises the steps:
Equipped with in four mouthfuls of burnings of thermometer, agitator, condenser pipe, nitrogen protection device and vacuum extractor, 40g M-phthalic acid, 10g adipic acid, 25g neopentyl glycol, 10g trimethylolpropane, 10g match gram, the catalytic antimony trioxide 0.1g are disposably put in four-hole bottle.When being warmed up to 140 DEG C, material starts to melt, and starts agitator stirring at low speed, after being warmed up to 160 DEG C, heats up per half an hour 10 DEG C, until temperature reaches 230 DEG C, continues esterification to system and reaches articulation point (becoming water white transparency shape), stop being passed through nitrogen.Open vacuum distillation apparatus, the little molecular product generated during slowly decompression removes polycondensation reaction and water, survey acid number at set intervals, when being reacted to acid number less than 10mgKOH/g, stop reaction, cool to 180 DEG C, add 10g trimellitic anhydride, insulation 40min, stops heating when sampling detecting acid number is about 50mgKOH/g.It is cooled to 140 DEG C, adds 20g propandiol butyl ether and reduce viscosity, treat that temperature is down to 80 DEG C and is added in amine and reaction 20min, add 240g water, fully dispersed, obtain the translucent waterborne polyester emulsion of pH7.0-8.0, its key property index sees attached list 1.
21g carborundum/zinc oxide composite heat-conducting filler and 20g water are disperseed 30min at high speed dispersor 5000r/min, it is subsequently adding 50g waterborne polyester dispersion, 6g water-compatible amino resin curing agent, 0.6g anti-settling agent, 0.9g thixotropic agent and appropriate corrosion inhibiter low speed to be sufficiently mixed, stand froth breaking, prepares aqueous high-temperature-resistant heat conductive insulating paint.
By coatings on the iron plate polished, 40min film-forming at 130 DEG C, coating thickness is about 10 m, and the paint film adhesion of gained is 1 grade, hardness 5H, paint film are 3.76 × 10 in 500V voltage lower volume resistivity11Ω m, humidity index (T20000) 168.3 DEG C;Paint film thermal conductivity factor can reach 1.570W/m K and improves about 7 times compared to matrix resin heat conductivility, and the TG curve of its paint film is shown in accompanying drawing 2, the thermal conductivity factor of paint film sees attached list 2.
The F class B insulation paint waterborne polyester performance indications of table 1 synthesis
The thermal conductivity factor of table 2 thermostable heat-conductive water-based insulating paint paint film
Project Compound/25 DEG C of 50%ZnO/SIC Compound/100 DEG C of 50%ZnO/SIC
Thermal diffusion coefficient α 0.291 mm2/s 0.206 mm2/s
Specific heat Cp 5.275 J/g/K 7.638 J/g/K
Thermal conductivity factor λ 1.534W/m•K 1.570W/m•K

Claims (6)

1. the preparation method of a thermostable heat-conductive water-based insulating paint, it is characterised in that: comprise the steps:
Prepare aqueous high-temperature-resistant heat conductive insulating paint: disperseed 0-1 hour by the hydromining high speed dispersor of 10-40 part heat filling and 10-30 part, add waterborne polyester dispersion 30-50 part, curing agent 1-10 part, anti-settling agent 0.1-2 part and thixotropic agent 0.1-2 part low speed to be sufficiently mixed, stand froth breaking, prepare aqueous high-temperature-resistant heat conductive insulating paint.
The preparation method of a kind of thermostable heat-conductive water-based insulating paint the most according to claim 1, it is characterised in that: described heat filling is the composition of one or more of aluminum oxide, aluminium nitride, boron nitride, silicon nitride, carborundum, zinc oxide.
The preparation method of a kind of thermostable heat-conductive water-based insulating paint the most according to claim 2, it is characterised in that: described heat filling is carborundum, zinc oxide.
The preparation method of a kind of thermostable heat-conductive water-based insulating paint the most according to claim 1, it is characterised in that: described anti-settling agent is the composition of one or more of carboxymethylcellulose calcium, hydroxymethyl cellulose, polyamide wax, aerosil.
The preparation method of a kind of thermostable heat-conductive water-based insulating paint the most according to claim 1, it is characterised in that: described thixotropic agent is aerosil.
The preparation method of a kind of thermostable heat-conductive water-based insulating paint the most according to claim 1, it is characterised in that: described described curing agent is full methyl etherified melamine HMMM.
CN201610308344.8A 2016-05-11 2016-05-11 Preparing method for high-temperature-resistant heat conducting water-based insulating paint Pending CN105838203A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106592902A (en) * 2016-12-06 2017-04-26 威骏(湖北)高新实业股份有限公司 Low-temperature far-infrared integral electric heating tender porcelain decorative material and preparation method thereof
CN106750224A (en) * 2016-12-08 2017-05-31 四川东材科技集团股份有限公司 A kind of heat-resistant water-soluble resin high, high rigidity semi-inorganic silicon-steel plate paint and preparation method thereof
CN109181511A (en) * 2018-07-19 2019-01-11 浙江博菲电气股份有限公司 A kind of high heat conductive insulating water paint

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101270256A (en) * 2007-03-23 2008-09-24 上海宝庆通用电工有限公司 Water-soluble insulating varnish and preparation method thereof
CN102746725A (en) * 2012-06-29 2012-10-24 宝山钢铁股份有限公司 Silicon steel water-soluble environment-friendly super thick insulating coating and preparation method thereof
CN104327682A (en) * 2014-09-23 2015-02-04 黄厚生 Waterborne polyester resin insulating varnish synthesis process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101270256A (en) * 2007-03-23 2008-09-24 上海宝庆通用电工有限公司 Water-soluble insulating varnish and preparation method thereof
CN102746725A (en) * 2012-06-29 2012-10-24 宝山钢铁股份有限公司 Silicon steel water-soluble environment-friendly super thick insulating coating and preparation method thereof
CN104327682A (en) * 2014-09-23 2015-02-04 黄厚生 Waterborne polyester resin insulating varnish synthesis process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106592902A (en) * 2016-12-06 2017-04-26 威骏(湖北)高新实业股份有限公司 Low-temperature far-infrared integral electric heating tender porcelain decorative material and preparation method thereof
CN106592902B (en) * 2016-12-06 2019-02-05 威骏(湖北)高新实业股份有限公司 A kind of Low Temperature Far Infrared integration electric heating porcelain tendre ornament materials and preparation method thereof
CN106750224A (en) * 2016-12-08 2017-05-31 四川东材科技集团股份有限公司 A kind of heat-resistant water-soluble resin high, high rigidity semi-inorganic silicon-steel plate paint and preparation method thereof
CN106750224B (en) * 2016-12-08 2018-10-26 四川东材科技集团股份有限公司 A kind of high heat-resistant water-soluble resin, high rigidity semi-inorganic silicon-steel plate paint and preparation method thereof
CN109181511A (en) * 2018-07-19 2019-01-11 浙江博菲电气股份有限公司 A kind of high heat conductive insulating water paint

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Application publication date: 20160810