阅读说明：本技术 一种白色uv纳米色浆及其制备方法 (White UV (ultraviolet) nano color paste and preparation method thereof ) 是由 冉淑燕 宋雪霞 李文彬 于 2019-09-29 设计创作，主要内容包括：本发明涉及一种白色UV纳米色浆及其制备方法。该色浆组分按照质量百分比包括：30.0～50.0％钛白粉,0.1～3.0％气相二氧化硅,30.0～50.0％丙烯酸单体,10.0～20.0％分散剂,0.1～1％润湿剂。该方法包括：将分散剂溶解于丙烯酸单体中,然后加入钛白粉、气相二氧化硅和润湿剂,搅拌,然后粗磨,细磨。该色浆具有很好的稳定性、较强的通用性、高固含量、低粘度等优点。(The invention relates to white UV (ultraviolet) nano color paste and a preparation method thereof. The color paste comprises the following components in percentage by mass: 30.0-50.0% of titanium dioxide, 0.1-3.0% of fumed silica, 30.0-50.0% of acrylic acid monomer, 10.0-20.0% of dispersing agent and 0.1-1% of wetting agent. The method comprises the following steps: dissolving a dispersing agent in an acrylic monomer, adding titanium dioxide, fumed silica and a wetting agent, stirring, and then carrying out coarse grinding and fine grinding. The color paste has the advantages of good stability, strong universality, high solid content, low viscosity and the like.)

1. The white UV nanometer color paste is characterized by comprising the following components in percentage by mass: 30.0-50.0% of titanium dioxide, 0.1-3.0% of fumed silica, 30.0-50.0% of acrylic acid monomer, 10.0-20.0% of dispersing agent and 0.1-1% of wetting agent.

2. The nano color paste according to claim 1, wherein the titanium dioxide is rutile titanium dioxide.

3. The nanometer color paste as claimed in claim 1, wherein the fumed silica is nanometer fumed silica, and the particle size of the nanometer fumed silica is 40-80 nm.

4. The nano color paste according to claim 1, wherein the acrylic acid monomer comprises: tetrahydrofuran methacrylate, tetrahydrofuran acrylate, isobornyl acrylate, 2 (2-ethoxyethoxy) ethyl acrylate, 2-phenoxyethyl acrylate, isooctyl acrylate, lauric acrylate, and at least one of 1, 6-hexanediol diacrylate, 1, 6-hexanediol dimethacrylate, tripropylene glycol diacrylate, dipropylene glycol diacrylate, propoxylated neopentyl glycol diacrylate, tripropylene glycol diacrylate.

5. The nano color paste according to claim 1, wherein the dispersing agent comprises: two or three of FLOWLEN G-700, FLOWLEN NC-500, FLOWLEN KDG-2400, FLOWLEN GW-1500, FLOWLEN DOPA-17HF, EFKA4300, EFKA4320, EFKA4340, EFKA4046, EFKA4050, EFKA4080, BYK-2009, BYK-365, BYK-357, BYK-385N, BYK-390, BYK-UV 3500.

6. The nanometer color paste as claimed in claim 1, wherein the wetting agent is fluorine modified polyacrylate; the particle size of the nano color paste is 250-300 nm.

7. The nano color paste as claimed in claim 6, wherein the fluorine modified polyacrylate comprises: one of EFKA3570, EFKA3600N, EFKA3772, EFKA3777N, EFKA 3600N.

8. The preparation method of the white UV nanometer color paste of claim 1, comprising the following steps:

dissolving a dispersing agent in an acrylic monomer, adding titanium dioxide, fumed silica and a wetting agent, stirring, coarsely grinding the obtained mixed slurry, and finely grinding to obtain the white UV nano color paste.

9. The method according to claim 8, wherein the stirring time is 10-30 min; the coarse grinding time is 2-3 h; the fine grinding time is 2-5 h.

10. The use of the nanopigment of claim 1 in UV inks.

Technical Field

The invention belongs to the field of UV ink color paste and preparation thereof, and particularly relates to white UV nano color paste and a preparation method thereof.

Background

The UV photocuring ink has the advantages of energy conservation, high efficiency, strong adaptability to substrates, ultralow VOC (volatile organic compounds) emission and the like, and particularly, the green and environment-friendly UV ink is rapidly developed along with the increasingly strict requirements of the country on environmental protection. In the past, the UV nano color paste mainly has C/M/Y/K four primary colors, and along with the rapid development of a UV spray painting technology, people have more and more extensive application of UV ink, white UV ink becomes a main component in the UV ink-jet ink, and the white UV ink can be used in a dark color substrate or a transparent substrate, so that the background color is covered or a colored pattern is developed, and the applicability of the UV colored ink is improved.

The white UV nano color paste is an important component in the white UV ink and plays an important role in the performance of the ink. Because the colorant of the UV color paste is mainly rutile titanium dioxide, the titanium dioxide is very easy to precipitate and delaminate due to high hardness, large specific gravity and difficult dispersion, and prepolymer resin is added into a plurality of color pastes in the dispersion process, so that the color pastes have no universality. Therefore, a white UV color paste with good stability and versatility is needed.

Disclosure of Invention

The invention aims to solve the technical problem of providing white UV nano color paste and a preparation method thereof, so as to overcome the defects of poor stability and poor universality of the white UV nano color paste in the prior art.

The invention provides white UV (ultraviolet) nano color paste which comprises the following components in percentage by mass: 30.0-50.0% of titanium dioxide, 0.1-3.0% of fumed silica, 30.0-50.0% of acrylic acid monomer, 10.0-20.0% of dispersing agent and 0.1-1% of wetting agent.

The titanium dioxide is rutile titanium dioxide with stable structural performance and good weather resistance.

The titanium dioxide is one of DuPont titanium dioxide R706, DuPont titanium dioxide R900, DuPont titanium dioxide R902+, American Federation titanium dioxide RCL69, American Federation titanium dioxide R595 and American Federation titanium dioxide R696.

The fumed silica is nano fumed silica, the particle size of the nano fumed silica is 40-80 nm, and the anti-settling effect is good.

The nanoscale fumed silica is one of TS720 and HDKN 20.

The acrylic monomer serves as a dispersion medium.

The acrylic monomers include: the single functionality monomer and the double functionality monomer are compounded.

The acrylic monomer comprises a monofunctional monomer and a bifunctional monomer in a mass ratio of 1: 1-4: 1.

The monofunctional monomer comprises one or more of tetrahydrofuran methacrylate, tetrahydrofuran acrylate, isobornyl acrylate, 2 (2-ethoxyethoxy) ethyl acrylate, 2-phenoxyethyl acrylate, isooctyl acrylate and lauric acid acrylate.

The bifunctional monomer comprises one or more of 1, 6-hexanediol diacrylate, 1, 6-hexanediol dimethacrylate, tripropylene glycol diacrylate, dipropylene glycol diacrylate, propoxylated neopentyl glycol diacrylate and tripropylene glycol diacrylate.

The dispersant comprises: two or three of FLOWLEN G-700, FLOWLEN NC-500, FLOWLEN KDG-2400, FLOWLENGW-1500, FLOWLEN DOPA-17HF, EFKA4300, EFKA4320, EFKA4340, EFKA4046, EFKA4050, EFKA4080, BYK-2009, BYK-365, BYK-357, BYK-385N, BYK-390, and BYK-UV 3500.

The wetting agent is fluorine modified polyacrylate.

The fluorine-modified polyacrylate includes: one of EFKA3570, EFKA3600N, EFKA3772, EFKA3777N, EFKA 3600N.

The particle size of the nano color paste is 250-300 nm.

The invention also provides a preparation method of the white UV nano color paste, which comprises the following steps:

dissolving a dispersing agent in an acrylic monomer, adding titanium dioxide, fumed silica and a wetting agent, stirring, coarsely grinding the obtained mixed slurry, and finely grinding to obtain the white UV nano color paste.

The stirring speed is 1500-2500 rad/min.

The stirring time is 10-30 min.

The coarse grinding speed is 1500-3000 rad/min; the fine grinding speed is 2000-4500 rad/min.

The coarse grinding time is 2-3 h; the fine grinding time is 2-5 h.

The coarse grinding and the fine grinding adopt a resin-free grinding mode without adding prepolymer resin.

The invention also provides application of the white UV nano color paste in UV ink.

According to the invention, a proper dispersant composition is selected, nano silicon dioxide with an anti-precipitation effect is added in the formula, and titanium white is ground and dispersed, so that the color paste has small particle size (the particle size is 250-300 nm), uniform dispersion and excellent stability, no precipitation exists at a high temperature of 70 ℃ for 7 days, and the color paste has no thickening and thickening, namely the viscosity and the particle size of the color paste are almost unchanged.

The color paste grinding and dispersing process adopts a resin-free grinding mode without adding prepolymer resin, and resin can be automatically added according to needs in the subsequent ink preparation process, so that the color paste grinding and dispersing method has strong universality.

Advantageous effects

(1) According to the invention, the titanium dioxide is ground and dispersed by adopting the compounding of the dispersing agent and adding the nanoscale fumed silica with the anti-settling effect in the formula, so that the color paste has good stability;

(2) the color paste does not contain prepolymer resin, so the color paste has stronger universality;

(3) the rutile titanium white with stable performance is selected as the titanium white, and is good in stability and weather resistance;

(4) the invention adopts a resin-free grinding mode, has high solid content of the color paste and is beneficial to coloring and covering.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

Titanium dioxide R706, R900, R902+ in the invention can be purchased from DuPont of America; titanium dioxide RCL69, R595, R696 are available from shanghai american gift chemicals trade ltd.

The nano gas-phase silicon dioxide TS720 in the invention can be purchased from the American cabot company; the nano fumed silica HDKN20 is available from wacker chemical, china ltd.

The single-functionality monomer tetrahydrofuran methacrylate, tetrahydrofuran acrylate, isobornyl acrylate, 2 (2-ethoxyethoxy) ethyl acrylate, 2-phenoxyethyl acrylate, isooctyl acrylate and lauric acid acrylate in the invention; difunctional monomers 1, 6-hexanediol diacrylate, 1, 6-hexanediol dimethacrylate, tripropylene glycol diacrylate, dipropylene glycol diacrylate, propoxylated neopentyl glycol diacrylate, tripropylene glycol diacrylate are available from sandomoma, guanzhou chemical co.

The dispersants FLOWLEN G-700, FLOWLEN NC-500, FLOWLEN KDG-2400, FLOWLENGW-1500 and FLOWLEN DOPA-17HF of the present invention are commercially available from Kyoho, Japan; EFKA4300, EFKA4320, EFKA4340, EFKA4046, EFKA4050, EFKA4080 are available from Pasteur; BYK-2009, BYK-365, BYK-357, BYK-385N, BYK-390, BYK-UV3500 are available from Pico Chemicals, Inc.

The wetting agent modified polyacrylates EFKA3570, EFKA3600N, EFKA3772, EFKA3777N, and EFKA3600N of the present invention are available from Pasteur.