CN114276735A - Aqueous environment-friendly low-temperature matte coating - Google Patents

Aqueous environment-friendly low-temperature matte coating Download PDF

Info

Publication number
CN114276735A
CN114276735A CN202210006669.6A CN202210006669A CN114276735A CN 114276735 A CN114276735 A CN 114276735A CN 202210006669 A CN202210006669 A CN 202210006669A CN 114276735 A CN114276735 A CN 114276735A
Authority
CN
China
Prior art keywords
parts
low
temperature
prepared
curing agent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210006669.6A
Other languages
Chinese (zh)
Inventor
胡浩东
刘薇薇
赵颖
黄磊
贾龙娟
徐庆
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haolisen Chemical Technology Jiangsu Co ltd
Original Assignee
Haolisen Chemical Technology Jiangsu Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Haolisen Chemical Technology Jiangsu Co ltd filed Critical Haolisen Chemical Technology Jiangsu Co ltd
Priority to CN202210006669.6A priority Critical patent/CN114276735A/en
Publication of CN114276735A publication Critical patent/CN114276735A/en
Pending legal-status Critical Current

Links

Abstract

The invention discloses an aqueous environment-friendly low-temperature matte coating, which comprises a low-temperature matte emulsion and a low-temperature matte color paste in a weight ratio of 4: 1; methylene is introduced into the paint to generate active hydrogen sealing effect, and the gradient deblocking composite totally-enclosed curing agent is adopted, so that a coating film presents a gradient curing process, the surface of the coating film presents a micro-concave-convex shape, diffuse reflection of light is formed, the glossiness is greatly reduced, and a good matte decoration effect is achieved; meanwhile, the coating does not contain heavy metals, has the advantages of good stability of a preparation tank, convenient construction, low curing temperature and the like, and is smooth in coating film appearance after electrophoretic coating, and the coating also has excellent salt spray resistance.

Description

Aqueous environment-friendly low-temperature matte coating
Technical Field
The invention belongs to the technical field of electrophoretic coatings, and particularly relates to a water-based environment-friendly low-temperature matte coating.
Background
After decades of development, electrophoretic coatings have been widely used in the automotive industry and in the metal coating fields of building materials, hardware, household appliances, furniture and the like because of the advantages of high efficiency, energy conservation, low pollution and the like.
In the field of furniture coating, people find that the high-gloss coating film surface has a large stimulation effect on eyes of users under the irradiation of light, so that a matte coating which is soft in gloss, has no stimulation effect on eyes and has texture is needed, and the matte coating enters the home life of people. In addition, the matte cathode electrophoresis coating is also widely applied to industries such as automobile and friction accessories, household appliances, hardware, electromechanics and the like, and the surface of the matte coating can shield slight paint film defects, so that the appearance is uniform and consistent, and the matte cathode electrophoresis coating is popular with users. At present, leveling property, paint film handfeel and low glossiness are main indexes for evaluating the properties of the matte cathode electrophoresis paint.
When the cathode electrophoretic paint film is required to achieve a certain extinction effect, light diffuse reflection must be formed on the surface of the paint film, otherwise, the extinction effect is not obvious. Therefore, most of matte coatings in the market achieve certain matting performance by virtue of materials such as matting powder and matting slurry (matting slurry) in a rotating manner, but the use amount of the filler is large, so that the leveling property and the mechanical property of the coating are greatly reduced, the matting efficiency and the film coating stability are reduced, and the effect of removing gloss is still not ideal. In addition, in consideration of factors such as energy conservation and environmental protection, low-temperature baking is often adopted during curing of general coatings, but the gloss of coating films obtained by low-temperature baking and curing is generally higher than that of coating films obtained by high-temperature baking, and in order to reduce the gloss, the existing matte coatings are still cured by high-temperature baking, so that the current energy-saving and environmental-friendly green requirements cannot be met.
Disclosure of Invention
Aiming at the problems, the invention provides the water-based environment-friendly low-temperature matte coating, the components of the coating do not contain heavy metals, and the coating has the advantages of good stability of a preparation tank, convenient construction, low curing temperature and the like, and after electrophoretic coating, the coating has smooth appearance, low glossiness and good matte decoration effect; the coating also has very good salt spray resistance.
In order to achieve the purpose, the invention adopts the following technical scheme:
the water-based environment-friendly low-temperature matte coating comprises a low-temperature matte emulsion and a low-temperature matte color paste in a weight ratio of 4: 1; wherein the content of the first and second substances,
the low-temperature matte emulsion is prepared from the following components: the curing agent comprises cation modified resin, a first curing agent, a second curing agent, a first neutralizing agent and deionized water;
the cation modified resin is prepared from the following components: bisphenol A epoxy resin, PPG-400, bisphenol A, methyl isobutyl ketone, dimethylbenzylamine, propylene glycol monobutyl ether, diethanolamine and ketimine;
the first curing agent is prepared from the following components: methyl isobutyl ketone, HDI trimer, methyl ethyl ketoxime, 3,5 dimethyl pyrazole and ethylene glycol ethyl ether;
the second curing agent is prepared from the following components: methyl isobutyl ketone, HDI tripolymer, PPG-400, diethyl malonate, ethyl acetoacetate and isobutanol;
the low-temperature matte color paste is prepared from the following components: tertiary amine grinding resin, a second neutralizing agent, bismuth lactate, zinc acetate, carbon black and inorganic filler.
In some embodiments, the low temperature matte emulsion is made from the following components in parts by weight: 36 parts of cation modified resin, 4-8 parts of first curing agent, 4-8 parts of second curing agent, 0.9 part of first neutralizing agent and 41 parts of deionized water.
In some embodiments, the cation modified resin is made from the following components in parts by weight: 74.1 parts of bisphenol A epoxy resin with the epoxy equivalent of 188, 6 parts of PPG-400, 20.4 parts of bisphenol A, 14.5 parts of methyl isobutyl ketone, 0.1 part of dimethylbenzylamine, 15 parts of propylene glycol monobutyl ether, 4 parts of diethanolamine and 4 parts of ketimine.
In some embodiments, the first curing agent is made from the following components in parts by weight: 20 parts of methyl isobutyl ketone, 40 parts of HDI trimer, 15 parts of methyl ethyl ketoxime, 5 parts of 3, 5-dimethylpyrazole and 5 parts of ethylene glycol ethyl ether.
In some embodiments, the second curing agent is made from the following components in parts by weight: 15 parts of methyl isobutyl ketone, 40 parts of HDI trimer, 0.1 part of sodium ethoxide, 3 parts of PPG-400, 1 part of diethyl malonate, 5 parts of ethyl acetoacetate and 10 parts of isobutanol.
In some embodiments, the low-temperature matte color paste is prepared from the following components in parts by weight: 35 parts of tertiary amine grinding resin, 2 parts of second neutralizing agent, 1 part of bismuth lactate, 1 part of zinc acetate, 2 parts of carbon black, 15 parts of inorganic filler and 3 parts of deionized water.
In some embodiments, the inorganic filler is one or more of washed kaolin, diatomaceous earth, wollastonite, and mixtures thereof.
In some embodiments, the first neutralizing agent and the second neutralizing agent are independently selected from one or two of acetic acid and lactic acid.
The invention has the beneficial effects that:
1. the coating components do not contain heavy metal materials, so that the VOC volatilization amount is lower during production and preparation, and the coating is more environment-friendly;
2. the curing agent is suitable for low-temperature baking and curing, and has low energy consumption and high curing fraction;
3. the coating product has excellent mechanical property, excellent storage stability and good tank liquor circulation stability;
4. the coating film has smooth appearance, the glossiness is between 10 and 20 degrees, and the matte effect is excellent;
5. the coating film also has excellent salt fog resistance, in an NSS salt fog test of zinc series phosphating for 600 hours, the unidirectional corrosion width of a salt fog marking fork is less than or equal to 2mm, and no foaming phenomenon exists at the marking fork and the edge.
Detailed Description
The technical solution of the present invention is further described with reference to the following specific examples.
EXAMPLE 1 preparation of cation-modified resin
Adding bisphenol A epoxy resin with epoxy equivalent 188, PPG-400, bisphenol A and methyl isobutyl ketone according to the formula amount into a flask provided with a thermometer, a stirrer and a reflux condenser, heating to 100 ℃, adding dimethylbenzylamine, continuously heating to 125 ℃, stirring for 1.5 hours until the epoxy equivalent is 800-plus 900, adding propylene glycol monobutyl ether, cooling to 75 ℃, adding diethanolamine, reacting at 80 ℃ for 1H, then adding ketimine, heating to 100 ℃, preserving heat for 2 hours, and cooling to 70 ℃ to obtain the cation modified resin.
The matrix epoxy resin is modified by PPG-400, so that the reactivity and the impact strength with a cross-linking agent are improved, and the flexibility and the heat resistance of a coating film can be improved; then amination is carried out to form the cation modified resin.
Example 2 preparation of a first curing agent
Components Dosage (parts by weight)
Methyl isobutyl ketone 25
HDI trimer 40
Methyl ethyl ketoxime 15
3, 5-dimethylpyrazole 5
Ethylene glycol Ether 5
Adding methyl isobutyl ketone and 3, 5-dimethylpyrazole into a reaction container with a stirrer and a condenser according to the formula amount, introducing nitrogen, dissolving and heating to 75 ℃, dropwise adding HDI tripolymer, continuously dropwise adding mixed solution of ethylene glycol ethyl ether and methyl ethyl ketoxime after finishing dropping for 1 hour, keeping the temperature at 75 ℃ for 2 hours after finishing dropping, testing NCO to be less than 0.5, cooling to below 45 ℃, discharging, and obtaining the first curing agent.
EXAMPLE 3 preparation of the second curing agent
Adding methyl isobutyl ketone, sodium ethoxide and HDI tripolymer into a reaction container with a stirrer and a condenser according to the formula amount, introducing nitrogen, dissolving and heating to 70 ℃, adding PPG-400, preserving heat for 1 hour, then continuously dropwise adding a mixed solution of diethyl malonate and ethyl acetoacetate, preserving heat for 2 hours at 75 ℃ after dropwise adding is finished, testing NCO to be less than 0.5, cooling to below 45 ℃, discharging, and obtaining the second curing agent.
Example 4 preparation of Low temperature matte emulsion Experimental example 1
Components Dosage (parts by weight)
Cationic modified resin prepared in example 1 36
First curing agent prepared in example 2 8
Second curing agent prepared in example 3 4
Lactic acid 0.6
Acetic acid 0.3
Deionized water 41
Adding the cation modified resin, the first curing agent and the second curing agent into a reaction vessel according to the formula amount, stirring for 1 hour, uniformly mixing, adding a neutralizing agent (lactic acid and acetic acid are dissolved by partial deionized water in advance), stirring for 1 hour, then adding the rest deionized water into the reaction vessel at one time, stirring for 2 hours at a high speed, and controlling the temperature of the reaction vessel below 45 ℃ in the whole preparation process to obtain the low-temperature matte emulsion experimental example 1.
Example 5 preparation of Low temperature matte emulsion Experimental example 2
The same process as in example 4 was used to prepare a low temperature matte emulsion example 2.
Example 6 preparation of Low temperature matte emulsion comparative example 1
Components Dosage (parts by weight)
Cationic modified resin prepared in example 1 36
First curing agent prepared in example 2 12
Lactic acid 0.6
Acetic acid 0.3
Deionized water 41
Adding the cation modified resin and the first curing agent into a reaction vessel according to the formula amount, stirring for 1 hour, uniformly mixing, adding a neutralizing agent (lactic acid and acetic acid are dissolved by partial deionized water in advance), stirring for 1 hour, then adding the rest deionized water into the reaction vessel at one time, stirring for 2 hours at a high speed, and controlling the temperature of the reaction vessel below 45 ℃ in the whole preparation process to obtain the low-temperature matte emulsion comparative example 1.
Example 7 preparation of Low temperature matte color paste
The preparation method of the tertiary amine grinding resin comprises the following steps: dissolving solid epoxy resin in propylene glycol methyl ether, performing one-step amination by adopting methyl monoethanolamine, and diluting by adopting methyl isobutyl ketone to control viscosity; after amination, polyamide is adopted for secondary amination, and propylene glycol butyl ether is added for dilution to control viscosity.
Adding the tertiary amine grinding resin into a dispersing cup according to the formula amount, sequentially adding lactic acid, acetic acid, bismuth lactate and zinc acetate under stirring, neutralizing and stirring for 20 minutes, sequentially adding carbon black, inorganic filler and deionized water, dispersing for 30 minutes, sanding, grinding until the fineness is less than or equal to 15 mu m, and discharging to obtain the low-temperature matte color paste.
Preparation and experiment of finished coating
Taking the low-temperature matte emulsions of the experimental examples 1 and 2 and the comparative example 1, respectively mixing the low-temperature matte emulsions with the low-temperature matte color paste prepared in the example 7 according to the weight ratio of 4:1 to prepare an electrophoresis tank solution with the solid content of 12%, aging the solution in the electrophoresis tank for 24 hours, preparing a sample plate (using a cold-rolled plate as a substrate and controlling the film thickness to be between 20 and 25 um) under the conditions of electrophoresis voltage of 150V, tank solution temperature of 30 ℃ and electrophoresis time of 60s, and curing and baking the sample plate at the temperature of 130 ℃/30 min.
The prepared samples were evaluated according to the national relevant standards, and the specific experimental data are shown in the following table.
According to the content of the above table, the water-based environment-friendly low-temperature matte coating provided by the invention introduces methylene to generate active hydrogen sealing effect, and adopts a gradient-deblocking composite totally-enclosed curing agent, so that the coating film presents a gradient curing process, the surface of the coating film presents a micro concave-convex shape, the diffuse reflection of light is formed, the glossiness is greatly reduced, and the coating has a good matte decoration effect. In addition, the coating is suitable for low-temperature baking and curing, the components do not contain heavy metal, the environment is protected, the heating decrement is low, the VOC volatilization is less, the environmental pollution is small, and after electrophoretic coating, the coating has a smooth appearance and excellent mechanical property and chemical medium resistance.
It will be apparent to those skilled in the art that various modifications may be made to the above embodiments without departing from the general spirit and concept of the invention. All falling within the scope of protection of the present invention. The protection scheme of the invention is subject to the appended claims.

Claims (8)

1. The water-based environment-friendly low-temperature matte coating is characterized by comprising a low-temperature matte emulsion and a low-temperature matte color paste in a weight ratio of 4: 1; wherein the content of the first and second substances,
the low-temperature matte emulsion is prepared from the following components: the curing agent comprises cation modified resin, a first curing agent, a second curing agent, a first neutralizing agent and deionized water;
the cation modified resin is prepared from the following components: bisphenol A epoxy resin, PPG-400, bisphenol A, methyl isobutyl ketone, dimethylbenzylamine, propylene glycol monobutyl ether, diethanolamine and ketimine;
the first curing agent is prepared from the following components: methyl isobutyl ketone, HDI trimer, methyl ethyl ketoxime, 3,5 dimethyl pyrazole and ethylene glycol ethyl ether;
the second curing agent is prepared from the following components: methyl isobutyl ketone, HDI tripolymer, PPG-400, diethyl malonate, ethyl acetoacetate and isobutanol;
the low-temperature matte color paste is prepared from the following components: tertiary amine grinding resin, a second neutralizing agent, bismuth lactate, zinc acetate, carbon black and inorganic filler.
2. The water-based environment-friendly low-temperature matte coating according to claim 1, wherein the low-temperature matte emulsion is prepared from the following components in parts by weight: 36 parts of cation modified resin, 4-8 parts of first curing agent, 4-8 parts of second curing agent, 0.9 part of first neutralizing agent and 41 parts of deionized water.
3. The water-based environment-friendly low-temperature matte coating according to claim 2, wherein the cation modified resin is prepared from the following components in parts by weight: 74.1 parts of bisphenol A epoxy resin with the epoxy equivalent of 188, 6 parts of PPG-400, 20.4 parts of bisphenol A, 14.5 parts of methyl isobutyl ketone, 0.1 part of dimethylbenzylamine, 15 parts of propylene glycol monobutyl ether, 4 parts of diethanolamine and 4 parts of ketimine.
4. The water-based environment-friendly low-temperature matte coating according to claim 2, wherein the first curing agent is prepared from the following components in parts by weight: 20 parts of methyl isobutyl ketone, 40 parts of HDI trimer, 15 parts of methyl ethyl ketoxime, 5 parts of 3, 5-dimethylpyrazole and 5 parts of ethylene glycol ethyl ether.
5. The water-based environment-friendly low-temperature matte coating according to claim 2, wherein the second curing agent is prepared from the following components in parts by weight: 15 parts of methyl isobutyl ketone, 40 parts of HDI trimer, 0.1 part of sodium ethoxide, 3 parts of PPG-400, 1 part of diethyl malonate, 5 parts of ethyl acetoacetate and 10 parts of isobutanol.
6. The water-based environment-friendly low-temperature matte coating according to claim 1, wherein the low-temperature matte color paste is prepared from the following components in parts by weight: 35 parts of tertiary amine grinding resin, 2 parts of second neutralizing agent, 1 part of bismuth lactate, 1 part of zinc acetate, 2 parts of carbon black, 15 parts of inorganic filler and 3 parts of deionized water.
7. The water-based environment-friendly low-temperature matte coating according to claim 6, wherein the inorganic filler is one or more of washing kaolin, diatomite and wollastonite.
8. The water-based environment-friendly low-temperature matte coating according to any one of claims 1 to 7, wherein the first neutralizing agent and the second neutralizing agent are respectively and independently selected from one or a mixture of two of acetic acid and lactic acid in any proportion.
CN202210006669.6A 2022-01-05 2022-01-05 Aqueous environment-friendly low-temperature matte coating Pending CN114276735A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210006669.6A CN114276735A (en) 2022-01-05 2022-01-05 Aqueous environment-friendly low-temperature matte coating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210006669.6A CN114276735A (en) 2022-01-05 2022-01-05 Aqueous environment-friendly low-temperature matte coating

Publications (1)

Publication Number Publication Date
CN114276735A true CN114276735A (en) 2022-04-05

Family

ID=80880261

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210006669.6A Pending CN114276735A (en) 2022-01-05 2022-01-05 Aqueous environment-friendly low-temperature matte coating

Country Status (1)

Country Link
CN (1) CN114276735A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103146295A (en) * 2013-03-01 2013-06-12 广东科德化工实业有限公司 Matte cathode electrophoresis coating as well as preparation method and use method for same
CN106318099A (en) * 2016-08-19 2017-01-11 浩力森涂料(上海)有限公司 Modified epoxy-grafted acrylic resin coating
CN106634384A (en) * 2016-10-01 2017-05-10 浙江科技学院 Preparation method of cation acrylate resin of cathode electrophoresis coating
CN109593182A (en) * 2018-11-08 2019-04-09 湖南湘江关西涂料有限公司 Non-ion aqueous blocked polyisocyanates curing agent and preparation method thereof, water paint
CN112251126A (en) * 2020-10-29 2021-01-22 浩力森化学科技(江苏)有限公司 Water-based environment-friendly high-performance low-temperature coating and preparation method thereof
CN112266714A (en) * 2020-10-29 2021-01-26 浩力森化学科技(江苏)有限公司 Preparation method of epoxy modified super-matte acrylic coating

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103146295A (en) * 2013-03-01 2013-06-12 广东科德化工实业有限公司 Matte cathode electrophoresis coating as well as preparation method and use method for same
CN106318099A (en) * 2016-08-19 2017-01-11 浩力森涂料(上海)有限公司 Modified epoxy-grafted acrylic resin coating
CN106634384A (en) * 2016-10-01 2017-05-10 浙江科技学院 Preparation method of cation acrylate resin of cathode electrophoresis coating
CN109593182A (en) * 2018-11-08 2019-04-09 湖南湘江关西涂料有限公司 Non-ion aqueous blocked polyisocyanates curing agent and preparation method thereof, water paint
CN112251126A (en) * 2020-10-29 2021-01-22 浩力森化学科技(江苏)有限公司 Water-based environment-friendly high-performance low-temperature coating and preparation method thereof
CN112266714A (en) * 2020-10-29 2021-01-26 浩力森化学科技(江苏)有限公司 Preparation method of epoxy modified super-matte acrylic coating

Similar Documents

Publication Publication Date Title
CN103554352B (en) A kind of Acrylate Cathodic Electrodeposition Coatings pigment dispersing resin and pigment slurry thereof
CN103289498B (en) A kind of Multipurpose high weather resistant acrylic acid electrophoretic paint and preparation method thereof
CN106318001A (en) Electrophoretic paint with high weather resistance and better spring coverage and preparation method thereof
CN103333595A (en) Cathode electrophoresis paint with combined bottom surfaces and preparation method and application method thereof
CN106281001B (en) A kind of water paint and preparation method thereof for dip-coating
CN106318099A (en) Modified epoxy-grafted acrylic resin coating
CN112266714B (en) Preparation method of epoxy modified super-matte acrylic coating
CN107384147A (en) A kind of high-performance household electrical appliances precoated coil coating and preparation method thereof
CN102337073B (en) Water-soluble nonluminous anionic electrophoretic coating and preparation method and application thereof
WO2015146480A1 (en) Electrodeposition coating composition and electrodeposition coating method
CN114276735A (en) Aqueous environment-friendly low-temperature matte coating
CN112251126A (en) Water-based environment-friendly high-performance low-temperature coating and preparation method thereof
CN108727958A (en) A kind of cathode electrophoresis dope and preparation method thereof
CN112409878A (en) Primer-topcoat integrated electrophoretic paint and preparation method thereof
RU2548972C2 (en) Copper-containing solution for prewashing yttrium-containing electroplating composition to improve anticorrosion protection
CN111073459A (en) Energy-saving and environment-friendly cathode electrophoretic coating
CN111909301A (en) Tertiary carbonate resin and preparation method and application thereof
CN110804364B (en) Preparation method of high throwing power emulsion
CN103502367A (en) Cationic electrodeposition coating composition and coated article
CN110563924A (en) Rosin modified epoxy grinding resin, electrophoresis color paste and preparation method
CN113185651B (en) Grafting emulsion and preparation method thereof
CN110951341A (en) Automobile finish composite coating capable of being rapidly cured and long in activation period and preparation method thereof
CN110437665B (en) Cathodic electrophoretic coating anticorrosive additive and preparation method thereof
CN113444436B (en) Core-shell structure epoxy modified acrylic acid cathode electrophoretic coating and preparation method thereof
CN105713495A (en) Water-soluble antirust coating containing fiber derivative

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination