CN109096894A - A kind of heating element of electric water heater surface high-temperaure coating and preparation method thereof - Google Patents

A kind of heating element of electric water heater surface high-temperaure coating and preparation method thereof Download PDF

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Publication number
CN109096894A
CN109096894A CN201810566758.XA CN201810566758A CN109096894A CN 109096894 A CN109096894 A CN 109096894A CN 201810566758 A CN201810566758 A CN 201810566758A CN 109096894 A CN109096894 A CN 109096894A
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CN
China
Prior art keywords
heating
water heater
electric water
agent
solution
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CN201810566758.XA
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Chinese (zh)
Inventor
叶碧锋
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电子科技大学中山学院
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Priority to CN201810566758.XA priority Critical patent/CN109096894A/en
Publication of CN109096894A publication Critical patent/CN109096894A/en

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
    • C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
    • C08G18/4269—Lactones
    • C08G18/4277—Caprolactone and/or substituted caprolactone
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4833—Polyethers containing oxyethylene units
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints

Abstract

The invention discloses a kind of heating element of electric water heater surface high-temperaure coatings and preparation method thereof, its key points of the technical solution are that: it is made of following weight percent composition: crosslinking agent 21~32%, chain extender 3~5%, coupling agent 1.6~6%, solvent 2~6%, 8.2~18% curing agent 0.1~1% of polyester-polyurethane, levelling defoaming agent 0.8~2%, ethyl alcohol 16~34%, corrosion inhibiter 0.4~0.6%, propylene glycol monomethyl ether 5~13%, ethyl acetate 0.5~1.5%, antioxidant 0.1~0.3%, pure distilled water 5~10%.The present invention provides a kind of heating element of electric water heater surface high-temperaure coating, has excellent high visual effect and heat-proof quality thoroughly, is coated on heating element of electric water heater surface, can completely cut off the external heat radiation of heat source, can separate fire source for a long time.

Description

A kind of heating element of electric water heater surface high-temperaure coating and preparation method thereof
[technical field]
The invention belongs to heat-insulating heat-preserving material technical fields, and in particular to a kind of heating element of electric water heater surface high temperature resistant Coating and preparation method thereof.
[background technique]
In household appliances, incubation and thermal insulation function, such as insulating pot, electric cooker, refrigerator, micro-wave oven are much required, Product on existing market, which has, carries out insulation, such as polyurethane foam, rock wool using heat-barrier material, leads to product appearance It is too fat to move huge, also have using heat preservation film, such as organic coating, precursor film layer, but heat insulation effect is also undesirable, and resistance to height Warm range is smaller, and not for a long time after will aging and occur heat insulating effect decline defect.Existing insulating mold coating Limitation practical application a big factor be film flexibility and weatherability it is too poor, coating be coated on substrate on solidify after be easy Phenomena such as existing film cracking, can be further exacerbated by the cracking of film if in order to improve flame retardant effect addition inorganic fire auxiliary agent, Household appliances heat insulating effect is poor simultaneously, will also result in product heating or refrigerating efficiency decline, generates unnecessary energy damage Consumption.
[summary of the invention]
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of heating element of electric water heater surface to be applied with high temperature resistant Layer has excellent high visual effect and heat-proof quality thoroughly, is coated on heating element of electric water heater surface, and it is external can to completely cut off heat source Heat radiation can separate fire source for a long time.
The present invention also provides a kind of preparation methods of heating element of electric water heater surface high-temperaure coating
Technical solution of the present invention is as follows:
A kind of heating element of electric water heater surface high-temperaure coating, is made of following weight percent composition:
Preferably, the crosslinking agent is aziridine, and the chain extender is dihydromethyl propionic acid.
Preferably, the coupling agent is that amino silicane coupling agent and aqueous titanic acid ester coupling agent mix.Coupling agent Selection, mass ratio is too high or too low, all can form corrosion hazards to metal surface, be unfavorable for the long-time service of coating.
Preferably, the solvent is butanediol.
Preferably, the polyester-polyurethane be made of following component and in total component quality accounting difference it is as follows:
Preferably, the curing agent is Isosorbide-5-Nitrae-lupetazin.
Preferably, the corrosion inhibiter is the mixture of ethylenediamine, triethanolamine and benzotriazole.Use the slow of the application Agent cooperation polyester-polyurethane reaction is lost, the coating system of the application also has nitrogen source and phosphorus source in addition to carbon source, so that resistance to height of preventing fires Warm system is able to perfect.
Preferably, the dispersion diluent used is propylene glycol monomethyl ether and ethyl alcohol.For different component using different Dispersion of industry agent.
A kind of preparation method of heating element of electric water heater surface high-temperaure coating, includes the following steps:
(a), now coupling agent powder is dissolved in suitable butanediol, prepares coupling agent solution；
(b), suitable butanediol dilution agent is added in crosslinking agent chain extender to stir, coupling is added in solution obtained Agent solution is mixed in the high-speed stirred container of 16~20 DEG C of closed constant temperature, after mixed at high speed stirs 20~30min, observes solution Solubility to transparent without muddy shape object, constant temperature storage, both component A solution；
(c), pure distilled water is heated to 60~70 DEG C, by antioxidant BHT 264 be added hot water in and stir 5~ 10min is completely dissolved to antioxidant and is cooled to room temperature for use；
(d), polycaprolactone glycol, polytetrahydrofuran diol to be sought successively adding on a small quantity according to formula constituent mass fraction Enter in 16~20 DEG C of containers of constant temperature, and be slowly added industrial solvent ethyl acetate and be diluted 15~25min of stirring, is then added IPDI, PEG, dispersion diluent propylene glycol monomethyl ether, and be slowly added to industrial alcohol ethyl alcohol and be diluted proportion, it is stirred for being blended Then corrosion inhibiter and curing catalysts blending and stirring 10-15min is added in 20~30min, be added and dissolve complete antioxidant solution With levelling defoaming agent organic silicon modified by polyether oil；
(e), by step (d) solution, the interior injection nitrogen of closed container excludes additional air in container, closed high-speed stirred 20 ~30min, obtains B component, is cooled to room temperature stand-by；
(f), by the room temperature solution of two components of A, B carry out be blended 1~2h of high-speed stirred, it is to be coated after stirring in Bubble dissipates completely naturally, heating element of electric water heater surface is coated on using flush coater, after coating layer thickness 0.5~2.5mm, 2H High-temperaure coating can normal use.
The present invention compared with the existing technology, has the advantage that
A kind of heating element of electric water heater surface high-temperaure coating of the invention, by related cross-links agent, coupling agent, chain extender Or retarder thinner etc., it is mixed through equal puddling, butanediol dissolution is into being made, and deposits in 16 DEG C of closed containers of constant temperature, add Polymerization reaction type polyester-polyurethane aqueous solution, it is common chemicals, and low in cost that materials procurement is extensive, process warp Catalysis reaction, is formed in the high molecular polymer that mobility is very poor and flame retardant effect is fabulous under hot conditions, takes full advantage of carbon Source combination forms stable polymer, ensure that the fire protecting performance and high adhesion force of coating；Again since PEG raw material is added Enhance the flexibility of coating with Isosorbide-5-Nitrae-lupetazin, and overcome be easy cracking the problem of, and the coating it is colorless and transparent, Slightly tart flavour, it is ensured that excellent high visual effect and the heat-proof quality thoroughly of product are coated on heating element of electric water heater surface, can Completely cut off the external heat radiation of heat source, in job run, heater surface temperature is lower than 80 degree, while improving the thermal effect of heater Rate can block fire source for a long time under high temperature environment, and low in cost；
A kind of preparation method of heating element of electric water heater surface high-temperaure coating of the invention, preparation process is simple, behaviour It is convenient to make method, reaction condition is loose, and the process for making the coating is extremely convenient, and environmental protection is easy to control, stay in grade, is suitble to Industrialized mass production.
[specific embodiment]
The invention will be further described combined with specific embodiments below:
A kind of preparation method of heating element of electric water heater surface high-temperaure coating, comprising the following steps:
(a), now coupling agent powder is dissolved in suitable butanediol, prepares coupling agent solution；
(b), suitable butanediol dilution agent is added in crosslinking agent chain extender to stir, coupling is added in solution obtained Agent solution is mixed in the high-speed stirred container of 16~20 DEG C of closed constant temperature, after mixed at high speed stirs 20~30min, observes solution Solubility to transparent without muddy shape object, constant temperature storage, both component A solution；
(c), pure distilled water is heated to 60~70 DEG C, by antioxidant BHT 264 be added hot water in and stir 5~ 10min is completely dissolved to antioxidant and is cooled to room temperature for use；
(d), polycaprolactone glycol, polytetrahydrofuran diol to be sought successively adding on a small quantity according to formula constituent mass fraction Enter in 16~20 DEG C of containers of constant temperature, and be slowly added industrial solvent ethyl acetate and be diluted 15~25min of stirring, is then added IPDI, PEG, dispersion diluent propylene glycol monomethyl ether, and be slowly added to industrial alcohol ethyl alcohol and be diluted proportion, it is stirred for being blended Then corrosion inhibiter and curing agent blending and stirring 10-15min is added in 20~30min, be added and dissolve complete antioxidant solution and stream Flat defoaming agent organic silicon modified by polyether oil；
(e), by step (d) solution, the interior injection nitrogen of closed container excludes additional air in container, closed high-speed stirred 20 ~30min, obtains B component, is cooled to room temperature stand-by；
(f), by the room temperature solution of two components of A, B carry out be blended 1~2h of high-speed stirred, it is to be coated after stirring in Bubble dissipates completely naturally, heating element of electric water heater surface is coated on using flush coater, after coating layer thickness 0.5~2.5mm, 2H High-temperaure coating can normal use.
Table 1: each component is constituted in Examples 1 to 4
Table 2: heating element of electric water heater surface high-temperaure coating obtained by Examples 1 to 4 and the existing coating comparative example 1 in market ~2 do contrast test
Note: cold-hot circularity test, it is desirable that after 15 times, coating does not crack, aliquation, falls off.
A kind of heating element of electric water heater surface high-temperaure coating of the invention, takes full advantage of carbon source combination, is formed Stable polymer ensure that the fire protecting performance and high adhesion force of coating；Again since PEG raw material and 1,4- dimethyl is added Piperazine enhances the flexibility of coating, and overcomes the problem of being easy cracking, and the coating is colorless and transparent, slightly tart flavour, really Excellent high visual effect and the heat-proof quality thoroughly for having protected product, are coated on heating element of electric water heater surface, can completely cut off heat source pair Outer heat radiation, while the thermal efficiency of heater is improved, fire source can be blocked for a long time under high temperature environment, and low in cost, Preparation process is simple, and operating method is convenient, and reaction condition is loose, and the process for making the coating is extremely convenient, and environmental protection is easy control System, stay in grade are suitble to industrialized mass production.

Claims (9)

1. a kind of heating element of electric water heater surface high-temperaure coating, it is characterised in that be made of following weight percent composition:
2. a kind of heating element of electric water heater surface high-temperaure coating according to claim 1, it is characterised in that: the friendship Connection agent is aziridine, and the chain extender is dihydromethyl propionic acid.
3. a kind of heating element of electric water heater surface high-temperaure coating according to claim 1, it is characterised in that: the idol Connection agent is that amino silicane coupling agent and aqueous titanic acid ester coupling agent mix.
4. a kind of heating element of electric water heater surface high-temperaure coating according to claim 1, it is characterised in that: described molten Agent is butanediol.
5. a kind of heating element of electric water heater surface high-temperaure coating according to claim 1, it is characterised in that: described poly- Ester polyurethane be made of following component and in total component quality accounting difference it is as follows:
6. a kind of heating element of electric water heater surface high-temperaure coating according to claim 1, it is characterised in that: described solid Agent is 1,4- lupetazin.
7. a kind of heating element of electric water heater surface high-temperaure coating according to claim 1, it is characterised in that: described slow Erosion agent is the mixture of ethylenediamine, triethanolamine and benzotriazole.
8. a kind of heating element of electric water heater surface high-temperaure coating according to claim 1, it is characterised in that: described to make Dispersion diluent is propylene glycol monomethyl ether and ethyl alcohol.
9. a kind of preparation method of heating element of electric water heater surface high-temperaure coating, it is characterised in that include the following steps:
(a), now coupling agent powder is dissolved in suitable butanediol, prepares coupling agent solution；
(b), suitable butanediol dilution agent is added in crosslinking agent chain extender to stir, it is molten that coupling agent is added in solution obtained Liquid is mixed in the high-speed stirred container of 16~20 DEG C of closed constant temperature, after mixed at high speed stirs 20~30min, observes the molten of solution For Xie Du to transparent without muddy shape object, constant temperature storage both obtains component A solution；
(c), pure distilled water is heated to 60~70 DEG C, antioxidant BHT 264 is added in hot water and is stirred 5~10min, to Antioxidant, which is completely dissolved, to be cooled to room temperature for use；
(d), it to seek polycaprolactone glycol, polytetrahydrofuran diol to sequentially add perseverance on a small quantity according to formula constituent mass fraction It in warm 16~20 DEG C of containers, and is slowly added industrial solvent ethyl acetate and is diluted 15~25min of stirring, be then added IPDI, PEG, dispersion diluent propylene glycol monomethyl ether, and be slowly added to industrial alcohol ethyl alcohol and be diluted proportion, it is stirred for being blended Then corrosion inhibiter and curing agent blending and stirring 10-15min is added in 20~30min, be added and dissolve complete antioxidant solution and stream Flat defoaming agent organic silicon modified by polyether oil；
(e), by step (d) solution, injection nitrogen excludes additional air in container in closed container, and closed high-speed stirred 20~ 30min obtains B component, is cooled to room temperature stand-by；
(f), by the room temperature solution of two components of A, B carry out be blended 1~2h of high-speed stirred, it is to be coated after stirring in bubble Naturally dissipation completely, is coated on heating element of electric water heater surface, resistance to height after coating layer thickness 0.5~2.5mm, 2H using flush coater Warm coating can normal use.
CN201810566758.XA 2018-06-05 2018-06-05 A kind of heating element of electric water heater surface high-temperaure coating and preparation method thereof CN109096894A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004018635A (en) * 2002-06-14 2004-01-22 Dainippon Ink & Chem Inc Aqueous polyurethane primer coating agent
CN101265318A (en) * 2008-05-15 2008-09-17 海聚高分子材料科技（广州）有限公司 High-performance water-based polyurethane dispersoid and application thereof
CN101805436A (en) * 2009-02-12 2010-08-18 浙江传化股份有限公司 Bi-component reaction-type flame-retardant waterborne polyurethane and preparation method thereof
CN104878388A (en) * 2014-02-28 2015-09-02 比亚迪股份有限公司 Deplating solution for stripping nickel layer on copper layer, and preparation method and deplating method thereof
CN106243792A (en) * 2016-08-22 2016-12-21 北京佑琳生科技有限公司 A kind of timber structure transparent fire-resisting paint
CN106519955A (en) * 2016-11-22 2017-03-22 国网河南省电力公司周口供电公司 Super-hydrophobic anticorrosive coating used for power transmission and transformation devices, and preparation method thereof
CN107474719A (en) * 2017-09-20 2017-12-15 安徽喜宝高分子材料有限公司 A kind of anti-soil white paint

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004018635A (en) * 2002-06-14 2004-01-22 Dainippon Ink & Chem Inc Aqueous polyurethane primer coating agent
CN101265318A (en) * 2008-05-15 2008-09-17 海聚高分子材料科技（广州）有限公司 High-performance water-based polyurethane dispersoid and application thereof
CN101805436A (en) * 2009-02-12 2010-08-18 浙江传化股份有限公司 Bi-component reaction-type flame-retardant waterborne polyurethane and preparation method thereof
CN104878388A (en) * 2014-02-28 2015-09-02 比亚迪股份有限公司 Deplating solution for stripping nickel layer on copper layer, and preparation method and deplating method thereof
CN106243792A (en) * 2016-08-22 2016-12-21 北京佑琳生科技有限公司 A kind of timber structure transparent fire-resisting paint
CN106519955A (en) * 2016-11-22 2017-03-22 国网河南省电力公司周口供电公司 Super-hydrophobic anticorrosive coating used for power transmission and transformation devices, and preparation method thereof
CN107474719A (en) * 2017-09-20 2017-12-15 安徽喜宝高分子材料有限公司 A kind of anti-soil white paint

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