CN112457720A - Pigment paste for electrophoretic paint and preparation method thereof - Google Patents
Pigment paste for electrophoretic paint and preparation method thereof Download PDFInfo
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- CN112457720A CN112457720A CN202011251257.6A CN202011251257A CN112457720A CN 112457720 A CN112457720 A CN 112457720A CN 202011251257 A CN202011251257 A CN 202011251257A CN 112457720 A CN112457720 A CN 112457720A
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- acrylic resin
- electrophoretic paint
- polycarboxylate
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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
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/001—Pigment pastes, e.g. for mixing in paints in aqueous medium
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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
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/006—Combinations of treatments provided for in groups C09C3/04 - C09C3/12
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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
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/06—Treatment with inorganic compounds
- C09C3/063—Coating
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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
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/10—Treatment with macromolecular organic compounds
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
- C09D5/4407—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications with polymers obtained by polymerisation reactions involving only carbon-to-carbon unsaturated bonds
- C09D5/4411—Homopolymers or copolymers of acrylates or methacrylates
-
- 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
- C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
- C09D5/448—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications characterised by the additives used
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
Abstract
The invention relates to a pigment slurry for an electrophoretic coating and a preparation method thereof, wherein the pigment slurry comprises the following components in parts by mass: 5-30 parts of quaternary ammonium salt modified acrylic resin, 5-25 parts of pigment, 1-3 parts of cosolvent and 30-50 parts of deionized water, wherein the quaternary ammonium salt modified acrylic resin is prepared by heating reaction of a quaternizing agent and epoxy group-containing acrylic resin in a solvent, and the pigment is polycarboxylate modified pigment. The pigment slurry for the electrophoretic paint has good dispersibility, excellent storage stability, good compatibility with other components in the electrophoretic paint, particularly main resin, simple preparation process, low production cost and easy industrial production.
Description
Technical Field
The invention belongs to the technical field of electrophoretic paint, and particularly relates to pigment slurry for electrophoretic paint and a preparation method thereof.
Background
The electrophoretic coating is a novel coating with low pollution, energy conservation, resource conservation and good corrosion resistance, has the advantages of smooth coating and good water resistance and chemical resistance, is easy to realize mechanization and automation of the coating industry, is suitable for coating workpieces with edges, corners and holes, and is widely applied to various fields, such as automobiles, electromechanics, household appliances, medical appliances and other industries requiring electrophoresis.
With the continuous development of the technology and the continuous expansion of the application field, the electrophoretic coating is not limited to a simple anti-corrosion function any more, and also has a decoration function of the material. Therefore, the dispersibility of the pigment in the electrodeposition coating composition is particularly important. The pigment is usually dispersed or ground and dispersed in a pigment dispersion resin to prepare a pigment slurry, which is stored for use. However, if the stirring is not performed regularly, the pigment is precipitated and the use is impaired, and particularly when long-distance transportation (for example, transportation to foreign countries) is required, the pigment paste stored is left unstirred for a long time. Therefore, it is urgently required to improve the storage stability of the dispersed slurry. In addition, in order to prevent the pigment from settling, circulation equipment is often used for circulation stirring, which results in high equipment cost and human capital.
Chinese patent CN 03158229.X discloses a pigment dispersion resin for cathode electrophoretic coating and its pigment slurry, its pigment dispersion resin is a cationic resin containing carbamido and quaternary ammonium salt group, react with epoxy resin by quaternizing agent, the said epoxy resin is one or several bisphenol A and/or bisphenol F glycidyl ether type epoxy resin, make up the pigment slurry by above-mentioned pigment dispersion resin, conventional pigment, catalyst and deionized water, but its pigment dispersion resin is made of bisphenol A type epoxy resin of modification of quaternizing agent, and compatibility of bisphenol A type epoxy resin and acrylic resin is poor, there are defects such as coarse, gloss low, etc. of paint film when color paste prepared by it is matched with acrylic emulsion; in addition, the used pigment is a conventional pigment, has poor dispersibility, is easy to generate precipitate and cannot meet the application requirement.
Disclosure of Invention
The invention aims to provide the pigment slurry for the electrophoretic paint and the preparation method thereof, and the prepared pigment slurry has good dispersibility, excellent storage stability, good compatibility with other components in the electrophoretic paint, especially with main resin, simple preparation process, low production cost and easy industrial production.
The technical scheme adopted by the invention for solving the problems is as follows: the pigment slurry for the electrophoretic paint comprises the following components in parts by mass:
5-30 parts of quaternary ammonium salt modified acrylic resin
5-25 parts of pigment
1-3 parts of cosolvent
30-50 parts of deionized water
The quaternary ammonium salt modified acrylic resin is prepared by heating and reacting a quaternizing agent and an epoxy group-containing acrylic resin in a solvent, and the pigment is a polycarboxylate modified pigment.
Preferably, the molar ratio of the active hydrogen of the quaternizing agent to the epoxy group of the epoxy group-containing acrylic resin is 0.7 to 1: 1.
Preferably, the quaternizing agent is prepared by the following steps: the quaternizing agent is prepared by reacting glycidyl carbonate with secondary amine at 50-150 ℃, adding an organic acid aqueous solution after epoxy groups completely disappear, and reacting at 70-80 ℃.
More preferably, the quaternizing agent is prepared by the following steps: and sequentially adding the tertiary carbonic acid glycidyl ester and the methylethanolamine into a reaction bottle provided with a thermometer, a stirrer and a reflux condenser tube, uniformly stirring, heating the reaction system to 130 ℃ for reaction, cooling to 70 ℃, adding a 50% lactic acid aqueous solution, heating to 80 ℃ for reaction for 2 hours after epoxy groups are completely disappeared.
Preferably, the acrylic resin containing epoxy groups is prepared from methyl methacrylate, butyl acrylate and glycidyl methacrylate by a free radical polymerization method.
More preferably, the molar ratio of the methyl methacrylate, the butyl acrylate and the glycidyl methacrylate is 6:3: 0.4.
Preferably, the polycarboxylate is obtained by copolymerization of a comonomer under the action of an initiator and under a stirring condition, wherein the comonomer is methacrylic acid and sodium allylsulfonate, and the molar ratio of the methacrylic acid to the sodium allylsulfonate is 3-5: 0.5 to 1; the copolymerization reaction temperature is 70-90 ℃, and the time is 2.5-3.5 h; and after the polymerization reaction is finished, adding sodium hydroxide into the copolymerization product for neutralization, and adjusting the pH value to 6-7.
More preferably, the molar ratio of methacrylic acid to sodium allylsulfate is 3.3: 1.
preferably, the cosolvent is at least one of dipropylene glycol methyl ether, ethylene glycol butyl ether, dipropylene glycol butyl ether, isopropanol and diethylene glycol butyl ether.
A preparation method of pigment slurry for electrophoretic paint comprises the following steps:
(1) preparation of polycarboxylate modified pigments
a. Carrying out inorganic coating treatment on the pigment: uniformly mixing the pigment and water, heating, uniformly dropwise adding an aluminum chloride solution, heating to 60-70 ℃, uniformly dropwise adding a sodium silicate solution, stirring for 0.5-2 h after dropwise adding the sodium silicate solution, controlling the pH to be 7 by using a hydrochloric acid solution with the mass percentage concentration of 20%, and then performing suction filtration, cleaning and drying.
b. And c, stirring the pigment subjected to inorganic coating treatment in the step a and polycarboxylate for 0.5-2 h, and filtering and drying to obtain the modified pigment.
(2) Preparation of pigment paste for electrophoretic coating
According to the raw material proportion of the pigment slurry, the quaternary ammonium salt modified acrylic resin, the polycarboxylate modified pigment, the cosolvent and water are uniformly mixed, and then are ground and dispersed by a sand mill until the fineness is less than or equal to 15 mu m to obtain the pigment slurry.
Compared with the prior art, the invention has the advantages that:
(1) the pigment is modified by adopting polycarboxylate, and the polycarboxylate containing a large amount of carboxyl and sulfonic groups is introduced to form charges on the surface of the pigment, so that the dispersion of the pigment is improved through charge repulsion, and flocculation is prevented.
(2) The quaternary ammonium salt modified acrylic resin adopted by the invention not only has good dispersibility for the pigment, but also has good matching effect of the pigment slurry containing the quaternary ammonium salt modified acrylic resin and the acrylic electrophoretic coating emulsion.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
The pigment slurry for the electrophoretic paint comprises the following components in parts by mass:
25 parts of quaternary ammonium salt modified acrylic resin
10 parts of polycarboxylate modified pigment
Dipropylene glycol methyl ether 2 parts
40 parts of deionized water
The quaternary ammonium salt modified acrylic resin is prepared by heating a quaternizing agent and an epoxy group-containing acrylic resin in a solvent for reaction, wherein the molar ratio of active hydrogen of the quaternizing agent to the epoxy group of the epoxy group-containing acrylic resin is 1: 1; the quaternizing agent is prepared by the following steps: sequentially adding glycidyl versatate and methylethanolamine into a reaction bottle provided with a thermometer, a stirrer and a reflux condenser tube, uniformly stirring, heating a reaction system to 130 ℃ for reaction, cooling to 70 ℃, adding 50% lactic acid aqueous solution, heating to 80 ℃ for reaction for 2 hours after epoxy groups are completely eliminated; the acrylic resin containing epoxy groups is prepared from methyl methacrylate, butyl acrylate and glycidyl methacrylate in a molar ratio of 6:3:0.4 by adopting a free radical polymerization method.
The polycarboxylate is obtained by carrying out copolymerization reaction on a comonomer at 75 ℃ by using sodium hypophosphite as a chain transfer agent under the action of an initiator ammonium persulfate for 3.5 hours, and then adding sodium hydroxide to adjust the pH to 6-7, wherein the comonomer is methacrylic acid and sodium allylsulfonate, and the molar ratio of the methacrylic acid to the sodium allylsulfonate is 3.3: 1.
a preparation method of pigment slurry for electrophoretic paint comprises the following steps:
(1) preparation of polycarboxylate modified pigments
a. Carrying out inorganic coating treatment on the pigment: uniformly mixing the pigment and water, heating, uniformly dropwise adding an aluminum chloride solution, heating to 70 ℃, uniformly dropwise adding a sodium silicate solution, stirring for 1h after dropwise adding the sodium silicate solution, controlling the pH to be 7 by using a hydrochloric acid solution with the mass percentage concentration of 20%, and then performing suction filtration, cleaning and drying.
b. And c, stirring the pigment subjected to inorganic coating treatment in the step a and polycarboxylate for 1h, and filtering and drying to obtain the modified pigment.
(2) Preparation of pigment paste for electrophoretic coating
According to the raw material proportion of the pigment slurry, the quaternary ammonium salt modified acrylic resin, the polycarboxylate modified pigment, the dipropylene glycol methyl ether and water are uniformly mixed and then ground and dispersed by a sand mill until the fineness is less than or equal to 15 mu m to obtain the pigment slurry.
Example 2
The pigment slurry for the electrophoretic paint comprises the following components in parts by mass:
15 parts of quaternary ammonium salt modified acrylic resin
Polycarboxylate modified pigment 20 parts
Ethylene glycol butyl ether 1 part
38 portions of deionized water
The quaternary ammonium salt modified acrylic resin is prepared by heating a quaternizing agent and an epoxy group-containing acrylic resin in a solvent for reaction, wherein the molar ratio of active hydrogen of the quaternizing agent to the epoxy group of the epoxy group-containing acrylic resin is 1: 1; the quaternizing agent is prepared by the following steps: sequentially adding glycidyl versatate and methylethanolamine into a reaction bottle provided with a thermometer, a stirrer and a reflux condenser tube, uniformly stirring, heating a reaction system to 130 ℃ for reaction, cooling to 70 ℃, adding 50% lactic acid aqueous solution, heating to 80 ℃ for reaction for 2 hours after epoxy groups are completely eliminated; the acrylic resin containing epoxy groups is prepared from methyl methacrylate, butyl acrylate and glycidyl methacrylate in a molar ratio of 6:3:0.4 by adopting a free radical polymerization method.
The polycarboxylate is obtained by carrying out copolymerization reaction on a comonomer at 80 ℃ by using sodium hypophosphite as a chain transfer agent under the action of an initiator ammonium persulfate for 3 hours, and then adding sodium hydroxide to adjust the pH value to 6-7, wherein the comonomer is methacrylic acid and sodium allylsulfonate, and the molar ratio of the methacrylic acid to the sodium allylsulfonate is 3.3: 1.
a preparation method of pigment slurry for electrophoretic paint comprises the following steps:
(1) preparation of polycarboxylate modified pigments
a. Carrying out inorganic coating treatment on the pigment: uniformly mixing the pigment and water, heating, uniformly dropwise adding an aluminum chloride solution, heating to 70 ℃, uniformly dropwise adding a sodium silicate solution, stirring for 1h after dropwise adding the sodium silicate solution, controlling the pH to be 7 by using a hydrochloric acid solution with the mass percentage concentration of 20%, and then performing suction filtration, cleaning and drying.
b. And c, stirring the pigment subjected to inorganic coating treatment in the step a and polycarboxylate for 1h, and filtering and drying to obtain the modified pigment.
(2) Preparation of pigment paste for electrophoretic coating
According to the raw material proportion of the pigment slurry, the quaternary ammonium salt modified acrylic resin, the polycarboxylate modified pigment, the ethylene glycol monobutyl ether and water are uniformly mixed, and then are ground and dispersed by a sand mill until the fineness is less than or equal to 15 mu m, so as to obtain the pigment slurry.
Comparative example 1
The only difference from example 1 is: the pigment is not modified and is a common pigment.
Comparative example 2
The only difference from example 1 is: the mole ratio of methacrylic acid to sodium allylsulfonate in the polycarboxylate of the polycarboxylate modified pigment is 1: 1.
the pigment pastes obtained in examples 1-2 and comparative examples 1-2 were subjected to the following property tests, and the test results are shown in Table 1.
Test method and evaluation criteria:
(1) pigment paste stability
The pigment slurry is observed by visual observation whether obvious pigment particle precipitation and flocculation phenomena occur after being placed in a closed manner at the temperature of 25 ℃ for 60 days.
(2) High temperature stability of pigment pastes
And sealing 500g of pigment paste in a special test bottle, placing the special test bottle into a 50 ℃ oven for high-temperature stability test, and respectively testing the pigment paste for 10 days to investigate whether the pigment paste has particle precipitation and fineness change.
The pigment pastes prepared in examples 1 to 2 and comparative example 1 were mixed with an emulsion (30 parts of a hydroxy acrylic resin, 2 parts of triethylamine, 40 parts of deionized water) at a mass ratio of 0.5:1 to prepare an electrophoretic coating working solution according to a conventional method, a coating film was prepared by a conventional electrophoretic coating method, and the test results were as shown in table 1 below.
(1) Paint film appearance
And observing whether the orange peel is smooth or uneven or flat by naked eyes. The judgment standard is as follows: 4 is very good, 3 is good, 2 is bad, and 1 is very bad.
(2) Washability of paint film
Detection is carried out according to the standard of GB/T9266-2009. The judgment standard is as follows: 4 is very good, and the washing and brushing resistance is more than or equal to 1 ten thousand times; 3 is good, and the washing resistance is more than or equal to 8 thousand and less than 1 ten thousand; 2 is a difference, and the washing resistance is more than or equal to 6 thousand and less than 8 thousand; 1 is very poor and the scrub resistance is less than 6 thousand.
(3) Weather resistance of paint film (in 1500 h)
The test was carried out in accordance with GB/T1865-1997, and the discoloration (color difference) of the paint film was examined. The judgment standard is as follows: 4 is very good, with a colour difference value < 3.0; 3 is good, the color difference value is more than or equal to 3.0 and less than 6.0; 2 is difference, and the color difference value is more than or equal to 6.0 and less than 9.0; 1 is very poor, and the color difference value is more than or equal to 9.0.
TABLE 1 pigment pastes and performance test results for their electrophoretic coatings
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (8)
1. A pigment paste for electrophoretic paint is characterized in that: the paint comprises the following components in parts by mass:
5-30 parts of quaternary ammonium salt modified acrylic resin
5-25 parts of pigment
1-3 parts of cosolvent
30-50 parts of deionized water
The quaternary ammonium salt modified acrylic resin is prepared by heating and reacting a quaternizing agent and an epoxy group-containing acrylic resin in a solvent, and the pigment is a polycarboxylate modified pigment.
2. The pigment paste for electrophoretic paint according to claim 1, wherein: the quaternizing agent is prepared by the following steps: the quaternizing agent is prepared by reacting glycidyl carbonate with secondary amine at 50-150 ℃, adding an organic acid aqueous solution after epoxy groups completely disappear, and reacting at 70-80 ℃.
3. The pigment paste for electrophoretic paint according to claim 1, wherein: the acrylic resin containing the epoxy group is prepared from methyl methacrylate, butyl acrylate and glycidyl methacrylate by adopting a free radical polymerization method.
4. The pigment paste for electrophoretic paint according to claim 3, wherein: the molar ratio of the methyl methacrylate to the butyl acrylate to the glycidyl methacrylate is 6:3: 0.4.
5. The pigment paste for electrophoretic paint according to claim 1, wherein: the polycarboxylate is obtained by copolymerization of a comonomer under the action of an initiator and under the stirring condition, wherein the comonomer is methacrylic acid and sodium allylsulfonate, and the molar ratio of the methacrylic acid to the sodium allylsulfonate is 3-5: 0.5 to 1; the copolymerization reaction temperature is 70-90 ℃, and the time is 2.5-3.5 h; and after the polymerization reaction is finished, adding sodium hydroxide into the copolymerization product for neutralization, and adjusting the pH value to 6-7.
6. The pigment paste for electrophoretic paint according to claim 5, wherein: the molar ratio of the methacrylic acid to the sodium allyl sulfate is 3.3: 1.
7. the pigment paste for electrophoretic paint according to claim 1, wherein: the cosolvent is at least one of dipropylene glycol methyl ether, ethylene glycol butyl ether, dipropylene glycol butyl ether, isopropanol and diethylene glycol butyl ether.
8. A preparation method of pigment slurry for electrophoretic paint is characterized by comprising the following steps: the method comprises the following steps:
(1) preparation of polycarboxylate modified pigments
a. Carrying out inorganic coating treatment on the pigment: uniformly mixing a pigment and water, heating, uniformly dropwise adding an aluminum chloride solution, heating to 60-70 ℃, uniformly dropwise adding a sodium silicate solution, stirring for 0.5-2 h after dropwise adding the sodium silicate solution, controlling the pH to be 7 by using a hydrochloric acid solution with the mass percentage concentration of 20%, and then performing suction filtration, cleaning and drying;
b. b, stirring the pigment subjected to inorganic coating treatment in the step a and polycarboxylate for 0.5-2 h, and filtering and drying to obtain a modified pigment;
(2) preparation of pigment paste for electrophoretic coating
According to the raw material proportion of the pigment slurry, the quaternary ammonium salt modified acrylic resin, the polycarboxylate modified pigment, the cosolvent and water are uniformly mixed, and then are ground and dispersed by a sand mill until the fineness is less than or equal to 15 mu m to obtain the pigment slurry.
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| CN202011251257.6A CN112457720A (en) | 2020-11-11 | 2020-11-11 | Pigment paste for electrophoretic paint and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011251257.6A CN112457720A (en) | 2020-11-11 | 2020-11-11 | Pigment paste for electrophoretic paint and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0107088A1 (en) * | 1982-09-30 | 1984-05-02 | Ppg Industries, Inc. | Novel pigment grinding vehicle |
| CN103554352A (en) * | 2013-09-29 | 2014-02-05 | 中国海洋石油总公司 | Pigment dispersion resin used for acrylic series cathode electrophoretic coating and pigment slurry thereof |
| CN110272641A (en) * | 2019-06-03 | 2019-09-24 | 广东维诺珠光颜料有限公司 | The preparation method and pearlescent pigment of a kind of polymolecularity pearlescent pigment and application |
-
2020
- 2020-11-11 CN CN202011251257.6A patent/CN112457720A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0107088A1 (en) * | 1982-09-30 | 1984-05-02 | Ppg Industries, Inc. | Novel pigment grinding vehicle |
| CN103554352A (en) * | 2013-09-29 | 2014-02-05 | 中国海洋石油总公司 | Pigment dispersion resin used for acrylic series cathode electrophoretic coating and pigment slurry thereof |
| CN110272641A (en) * | 2019-06-03 | 2019-09-24 | 广东维诺珠光颜料有限公司 | The preparation method and pearlescent pigment of a kind of polymolecularity pearlescent pigment and application |
Non-Patent Citations (2)
| Title |
|---|
| 刘磊等: "超低相对分子质量丙烯酸/烯丙基磺酸钠的制备及对陶瓷粉体的分散性能", 《精细化工》 * |
| 粉体表面改性 第2版: "《粉体表面改性 第2版》", 31 August 2003, 中国建材工业出版社 * |
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Application publication date: 20210309 |