High-transmittance blue paste for automobile color-changing film and preparation method of high-transmittance blue paste

Abstract

The invention relates to the technical field of color paste, in particular to high-transmittance blue paste for an automobile color-changing film and a preparation method of the high-transmittance blue paste. Comprising the following components in percentage by weight based on the total weight of the preparation in each case: 15 to 30 weight percent of blue organic pigment, 5 to 15 weight percent of cellulose acetate butyrate, 5 to 15 weight percent of nano titanium dioxide, 5 to 20 weight percent of aldehyde resin, 10 to 20 weight percent of dispersing agent, 10 to 30 weight percent of ethyl acetate and 10 to 25 weight percent of methyl isobutyl ketone, wherein the sum of the weight percentages of all the components is 100% by weight. The nano titanium dioxide is added, specifically screened pigment and formula are combined, a novel dual-power centrifugal sand mill is introduced, the high-transparency blue paste with the color paste particle size being 50 nanometers and the transparency and color saturation being similar to those of special color paste for automobile paint is produced, better effect pigment arrangement can be provided in a color changing film, and the color changing effect is good. And the anti-mist and higher metal flickering effects are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of color pastes, and in particular to a high-transmittance blue paste for automobile color-changing films and a preparation method thereof. Background Art

[0002] With the development of China's economy, the sales of passenger cars have been rising year by year, and the total sales in 2023 will be 26.063 million, a year-on-year increase of 10.6%. The automotive paint coatings used for passenger cars are even more diverse in color, providing consumers with a variety of colors to choose from. However, this choice is determined when the car is painted at the factory. When consumers want to change the color of the car, the existing painting methods are not only complicated but also more expensive. The car color change film can meet the needs of consumers in a simple and affordable way. Although the existing color change film can provide a variety of colors and effects, the color saturation and gorgeousness often cannot reach the level of the original car paint. Summary of the invention

[0003] The purpose of the present invention is to mainly solve the problems of insufficient saturation and low sparkle of the color paste of the car color changing film, and to provide a high-transmittance blue paste for the car color changing film and a preparation method thereof, so as to provide higher saturation and ultra-high transparency, and to improve the arrangement of effect pigments, reduce the cloud effect of metallic paint and increase the sparkle.

[0004] To achieve the above object, the present invention is designed to be a high-transmittance blue slurry for a car color-changing film, which comprises the following components in parts by weight based on the total weight of the preparation:

[0005] 15-30 weight percent of blue organic pigment, 5-15 weight percent of cellulose acetate butyrate, 5-15 weight percent of nano titanium dioxide, 5-20 weight percent of polyaldehyde resin, 10-20 weight percent of dispersant, 10-30 weight percent of ethyl acetate, and 10-25 weight percent of methyl isobutyl ketone, wherein the sum of the weight percentages of the various components is 100 weight percent.

[0006] Preferably, the blue organic pigment is PB15:2 phthalocyanine blue with anti-flocculation properties.

[0007] Preferably, the cellulose acetate butyrate is Eastman CAB-3 series.

[0008] Preferably, the nano titanium dioxide is a nano-scale titanium dioxide, wherein the average particle size of the basic particles of the nano titanium dioxide is below 30 nm.

[0009] Preferably, the polyaldehyde resin pigment preparation is an aldehyde-ketone resin.

[0010] Preferably, the dispersant is a 100% high molecular organic copolymer wetting powder.

[0011] The present invention also provides a method for preparing a high-transmittance blue slurry for a car color-changing film, comprising the following steps:

[0012] S1. The components 5-15 wt% cellulose acetate butyrate, 5-20 wt% polyaldehyde resin and 10-20 wt% dispersant are introduced into a solvent of 10-30 wt% ethyl acetate and 10-25 wt% methyl isobutyl ketone, and stirred to mix evenly;

[0013] S2. 15-30 wt% blue organic pigment and 5-15 wt% nano titanium dioxide were added and mixed at high speed, and the resulting mixture was ground into the next step;

[0014] S3. Grinding uses a dual-power centrifugal sand mill with a cavity of 5-10L, a cavity filling rate of 85%-95%, and a grinding medium of 0.1mm-0.3mm zirconium beads;

[0015] S4. Use the circular grinding method to produce a high-transmittance blue slurry for the car color-changing film.

[0016] Compared with the prior art, the present invention adds nano titanium dioxide and combines it with specifically selected pigments and formulas, and introduces a new dual-power centrifugal sand mill to produce a color paste with a particle size of 50 nanometers. The transparency and color saturation are comparable to those of special color pastes for automotive coatings. The blue paste can provide better effect pigment arrangement in the color-changing film, and has anti-clouding and higher metallic sparkle effects. DETAILED DESCRIPTION

[0017] In order to make the purpose and principle of the present invention more clear, it is further described below in conjunction with specific embodiments.

[0018] The reagents used in the present invention can be products of the following companies:

[0019] (A) preferably contains at least one phthalocyanine blue: BASF's Blue 6875F,

[0020] Blue L 6905F, Blue L 6975F;

[0021] (B) component comprises at least one cellulose acetate butyrate: CAB-381-0.5, CAB-551-0.2, CAP-482-0.5 of Eastman;

[0022] (C) component is nano-scale titanium dioxide with an average particle size of about 30, including at least one of the following ingredients: Evonik Degussa AEROXIDE P25 titanium dioxide, Japan Ishihara TTO-55D titanium dioxide;

[0023] (D) component is polyaldehyde resin, preferably BASF's polyaldehyde resin Laropal A81;

[0024] The dispersant as component (E) contains at least one of the following: DISPERBYK-2013, DISPERBYK-180, OMG Gen 0451;

[0025] (F) Ethyl acetate and (G) Methyl isobutyl ketone are selected from industrial grade products with a purity content greater than or equal to 99%.

[0026] Example 1

[0027]

[0028] Preparation steps: put ethyl acetate, methyl isobutyl ketone, cellulose acetate butyrate, Laropal A81 and dispersant into the dispersion tank in turn, stir with the matching mixer at 200rpm-500rpm for 10-20 minutes, then add nano titanium dioxide and blue powder, adjust the mixer to 800rpm-1000rpm and stir for 30 minutes. After high-speed dispersion, use the circulation grinding method and put it into the dual-power centrifugal sand mill. When the test particle size reaches 50 nanometers, the high-transmittance blue slurry of the car color change film is obtained.

[0029] Example 2

[0030]

[0031] The manufacturing steps are the same as in Example 1.

[0032] Example 3

[0033]

[0034]

[0035] The manufacturing steps are the same as in Example 1.

[0036] Example 4

[0037]

[0038] The manufacturing steps are the same as in Example 1.

[0039] The preparation methods of Examples 1-4 are shown in Table 1:

[0040] product Example 1 Example 2 Example 3 Example 4 Particle size nm<54 nm<59 nm<49 nm<57 transparency 97.3 96.2 96.9 97.1 Plaque index (15°Mh-Mg) 0.32 0.21 0.23 0.19 Claw mark index (15°M) 3.2 2.9 2.8 3.1 Flicker Level 6 7 6 6

[0041] Examples 1-4 have good compatibility and transparency in the thermoplastic acrylic system specially used for automobile color-changing films, and have excellent anti-clouding effects and better metallic sparkle grades.

[0042] Efficiency test according to grinding process

[0043]

[0044]

[0045] In the grinding efficiency test of Example 1-4, after 6 hours of cyclic grinding, the particle size of the color paste can reach about 50 nanometers. The experimental results show that it has excellent grinding efficiency.

[0046] Comparison between Example and Comparative Example

[0047] product Example 1 Comparative Example 1 Comparative Example 2 Particle size nm<54 nm<321 nm<254 transparency 97.3 ＜89.7 ＜82.2 Plaque index (15°Mh-Mg) 0.32 0.62 0.57 Claw mark index (15°M) 3.2 5.5 4.8 Flicker Level 6 3 5

[0048] Example 1 and Comparative Example 1 show that Example 1 has a smaller particle size and better anti-cloud performance. Example 1 and Comparative Example 2 show that Example 1 has a higher transparency and metallic sparkle level. The difference between Comparative Example 1 and Example 1 is that ordinary Longman Billions R-996 titanium dioxide is used instead of AEROXIDE P25 nano titanium dioxide. The difference between Comparative Example 2 and Example 1 is that inorganic ultramarine blue is used instead of Blue 6875F.

[0049] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical solutions and novel concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-transmittance blue slurry for automobile color-changing film, characterized in that: Based on the total weight of the preparation, the following components are included in weight: 15-30 weight percent of blue organic pigment, 5-15 weight percent of cellulose acetate butyrate, 5-15 weight percent of nano titanium dioxide, 5-20 weight percent of polyaldehyde resin, 10-20 weight percent of dispersant, 10-30 weight percent of ethyl acetate, and 10-25 weight percent of methyl isobutyl ketone, wherein the sum of the weight percentages of the various components is 100 weight percent.

2. A high-transmittance blue slurry for automobile color-changing film as claimed in claim 1, characterized in that: The blue organic pigment is PB15:2 phthalocyanine blue with anti-flocculation properties.

3. The high-transmittance blue slurry for automobile color-changing film according to claim 1, characterized in that: The cellulose acetate butyrate is Eastman CAB-3 series.

4. A high-transmittance blue slurry for automobile color-changing film as claimed in claim 1, characterized in that: The nano titanium dioxide is a nano-scale titanium dioxide, wherein the average particle size of the basic particles of the nano titanium dioxide is below 30 nm.

5. The high-transmittance blue slurry for automobile color-changing film according to claim 1, characterized in that: The polyaldehyde resin pigment preparation is an aldehyde-ketone resin.

6. The high-transmittance blue slurry for automobile color-changing film according to claim 1, characterized in that: The dispersant is 100% high molecular organic copolymer wetting powder.

7. A method for preparing a high-transmittance blue slurry for a car color-changing film as claimed in claim 1, characterized in that: The following steps are involved: S1. The components 5-15 wt% cellulose acetate butyrate, 5-20 wt% polyaldehyde resin and 10-20 wt% dispersant are introduced into a solvent of 10-30 wt% ethyl acetate and 10-25 wt% methyl isobutyl ketone, and stirred to mix evenly; S2. 15-30 wt% blue organic pigment and 5-15 wt% nano titanium dioxide were added and mixed at high speed, and the resulting mixture was ground into the next step; S3. Grinding uses a dual-power centrifugal sand mill with a cavity of 5-10L, a cavity filling rate of 85%-95%, and a grinding medium of 0.1mm-0.3mm zirconium beads; S4. A high-transmittance blue slurry for car color-changing film was prepared using a circular grinding method.

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