Environment-friendly interior paint for automobile

Abstract

The invention discloses automobile environment-friendly interior paint, and belongs to the technical field of paint. The interior paint is prepared from the following raw materials in parts by weight: 60 to 70 parts of silane modified high-hydroxyl environment-friendly acrylic resin, 0.5 to 1.5 parts of dispersing agent, 3.0 to 5.0 parts of nano metal pigment, 0.1 to 0.5 part of flatting agent, 0.2 to 0.4 part of activating agent, 1.0 to 2.0 parts of ultraviolet absorbent, 0.6 to 1.0 part of light stabilizer and 10 to 30 parts of organic solvent. The interior paint has the advantages of being low in odor, full in paint film, high in gloss, high in adhesive force, high in corrosion resistance and the like, is easy and convenient to construct, high in coating efficiency, low-carbon, environmentally friendly, free of harm to human bodies and the environment and good in market prospect.

Description

Technical Field

[0001] The invention belongs to the technical field of coatings, and in particular relates to an environmentally friendly automotive interior paint. Background Art

[0002] Car interiors account for 60% of the entire car and are the main components of the car. With the upgrading of car consumption in today's society, people's demand for personalized cars is constantly developing, and the requirements for the decorativeness of car interior parts are getting higher and higher. At the same time, due to the emphasis on the environment and the improvement of laws and regulations, people are pursuing high quality of car interior parts while paying more and more attention to their environmental performance. Therefore, the development of interior coatings that are both environmentally friendly and have excellent performance has become a research focus of automotive coatings.

[0003] Plastics are widely used due to their advantages such as light weight, wide design space, potential for component combination, good dynamic performance, good energy absorption capacity in the event of a collision to reduce the degree of damage in the event of a collision, and no rust and corrosion. Among them, ABS plastics are widely used in the fields of automobiles, home appliances, daily necessities, etc. At present, in the coating of automobile interiors of ABS plastics, the market generally adopts the environmentally unfriendly 2C1B or 3C1B process, and there are very few environmentally friendly products with single coating and high gloss. In addition, the existing ABS plastic paints on the market have average acid and alkali resistance and strong odor. When the temperature rises, the plastic interior parts in the car will have some pungent smell after being exposed to the sun. At the same time, because the plastic parts are easily aged and brittle after long-term exposure to the sun, the service life is reduced. Therefore, it is of practical significance to prepare a high-grade environmentally friendly interior paint for automobiles. Summary of the invention

[0004] The purpose of the present invention is to provide an environmentally friendly automotive interior paint, which has the advantages of low odor, full paint film, high gloss, simple construction, high coating efficiency, etc., and is low-carbon and environmentally friendly, has no harm to the human body and the environment, and has good market prospects.

[0005] To achieve the above object, the present invention adopts the following technical solution: An environmentally friendly automotive interior paint, the raw materials and amounts of which are as follows, by weight: 60-70 parts of silane-modified high-hydroxyl environmentally friendly acrylic resin; Dispersant 0.5-1.5 parts; 3.0-5.0 parts of nano metal pigment; Leveling agent 0.1-0.5 parts; Activator 0.2-0.4 parts; 1.0-2.0 parts of ultraviolet light absorber; Light stabilizer 0.6-1.0 part; 10-30 parts of organic solvent.

[0006] Furthermore, the silane-modified high-hydroxyl environmentally friendly acrylic resin is prepared by mixing high-hydroxyl environmentally friendly acrylic resin and silane coupling agent in a mass ratio of 30:1, adding alkali as a catalyst, and mixing and stirring for 180 minutes at 140° C. and a rotation speed of 800 r / min; the reaction formula is: ; The high-hydroxyl environmentally friendly acrylic resin is selected from one or more of Nupes Setalux 1192SS-60 and Mitsubishi Rayon Chemical Dianal LR-7568; the alkali is sodium hydroxide, and the added amount is 0.5% of the mass of the high-hydroxyl environmentally friendly acrylic resin used.

[0007] Furthermore, the dispersant may be selected from various dispersants in the art; preferably, it may be one or more of polyurethane polymers, polyurethane oligomers or high molecular weight block copolymers.

[0008] Furthermore, the nano metal pigment may be any of various nano pigments in the art; preferably one or more of Degussa DEGUESS FW-200 or BASF Basf 0066K.

[0009] Furthermore, the leveling agent can be selected from various leveling agents in the art; preferably, it is one or more of fluorocarbon modified acrylate leveling agents, polyether modified polymethyl alkyl siloxane leveling agents or acrylic copolymer leveling agents.

[0010] Furthermore, the activator can be selected from various activators in the art; preferably one or more of inorganic acid activators, alkali activators or organic compound activators.

[0011] Furthermore, the ultraviolet light absorber can be selected from various ultraviolet light absorbers in the art; preferably, benzotriazole, specifically one or more of BASF UV-1130, UV-234 or UV-5312.

[0012] Furthermore, the light stabilizer can be selected from various light stabilizers in the art; preferably, it is a high molecular weight hindered amine light stabilizer, and the high molecular weight hindered amine light stabilizer includes one or more of BASF CHIMASSORB 944, UV-292 or UV-6222.

[0013] Furthermore, the organic solvent may be any organic solvent in the art; preferably, one or more of an ester solvent or an aromatic hydrocarbon solvent.

[0014] The preparation method of the environmentally friendly automobile interior paint comprises the following steps: (1) dissolving a silane-modified high-hydroxyl environmentally friendly acrylic resin and a dispersant in a portion of an organic solvent and mixing them uniformly to obtain a mixture A; (2) Slowly adding the nano metal pigment into the mixture A under low-speed stirring, stirring until the pigment is completely coated, and then stirring at high speed to fully mix the pigment and the mixture A to obtain a mixture B; (3) Grind the mixture B to a fineness of ≤5 μm, filter, and then sequentially add a leveling agent, an activator, an ultraviolet light absorber, a light stabilizer, and the remaining organic solvent under medium-speed stirring, and then stir at a high speed until the mixture is uniform, let it stand, and filter to obtain the automotive high-grade environmentally friendly interior paint.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The interior paint of the present invention has excellent adhesion on ABS and modified ABS, and has acid and alkali resistance. The coating does not bubble, wrinkle or fall off after 500 hours, and the adhesion is not affected.

[0016] (2) The interior paint of the present invention is placed in 5 wt % hydrochloric acid at an ambient temperature of 50° C. for more than 1000 h, and the paint film does not soften, bubble or fall off.

[0017] (3) When the interior paint of the present invention is placed in 5 wt % sodium hydroxide at an ambient temperature of 50° C. for more than 1000 h, the paint film does not soften, bubble or fall off.

[0018] (4) The interior paint of the present invention is immersed in 55°C water for more than 1000 hours, and the paint film does not soften, bubble or fall off.

[0019] (5) The interior paint of the present invention has low odor, and no noticeable odor is emitted even when the car windows are closed for a long time.

[0020] (6) The interior paint film of the present invention is full and has high gloss. At the same time, it retains a high-hydroxyl environmentally friendly acrylic resin with a relatively high glass transition temperature as an auxiliary resin, so that the initial hardness of the coating is relatively high, which can reach above HB, thereby solving the problem of packaging marks that are easily generated during the packaging of existing plastic paints.

[0021] (7) The interior paint of the present invention is easy to apply and has high coating efficiency, which can reduce the waste and trouble caused by frequent paint changes during construction.

[0022] (8) The interior paint of the present invention is low-carbon and environmentally friendly, and is harmless to the human body and the environment.

[0023] (9) After the interior paint of the present invention is applied, the paint film does not lose gloss or become damaged after being repeatedly scrubbed with steel wool and car wash liquid for more than 5,000 times.

[0024] (10) After the interior paint of the present invention is applied, the paint film will not soften, be damaged, or peel off if the paint film is repeatedly wiped with imported cosmetics for 120 hours. DETAILED DESCRIPTION

[0025] An environmentally friendly automotive interior paint, the raw materials and amounts of which are as follows, by weight: 60-70 parts of silane-modified high-hydroxyl environmentally friendly acrylic resin; Dispersant 0.5-1.5 parts; 3.0-5.0 parts of nano metal pigment; Leveling agent 0.1-0.5 parts; Activator 0.2-0.4 parts; 1.0-2.0 parts of ultraviolet light absorber; Light stabilizer 0.6-1.0 part; 10-30 parts of organic solvent.

[0026] The preparation method of the environmentally friendly automobile interior paint comprises the following steps: (1) dissolving a silane-modified high-hydroxyl environmentally friendly acrylic resin and a dispersant in a portion of an organic solvent and mixing them uniformly to obtain a mixture A; (2) Slowly adding the nano metal pigment into the mixture A under low-speed stirring at 450 rpm, stirring until the pigment is completely coated, and then fully mixing the pigment and the mixture A under high-speed stirring at 1300 rpm to obtain a mixture B; (3) Grind the mixture B to a fineness of ≤5 μm, filter, and sequentially add a leveling agent, an activator, an ultraviolet light absorber, a light stabilizer, and the remaining organic solvent under medium-speed stirring at 800 rpm, and then stir at high speed at 1300 rpm until the mixture is uniformly mixed. After standing for 15 minutes and filtering, the high-grade environmentally friendly automotive interior paint is obtained.

[0027] The silane-modified high-hydroxyl environmentally friendly acrylic resin is prepared by mixing high-hydroxyl environmentally friendly acrylic resin and silane coupling agent at a mass ratio of 30:1, adding 0.5% of the mass of the high-hydroxyl environmentally friendly acrylic resin as a catalyst, and mixing and stirring for 180 minutes at 140°C and a speed of 800r / min. The high-hydroxyl environmentally friendly acrylic resin used is selected from one or more of Nupes Setalux1192SS-60 or Mitsubishi Rayon Chemical Dianal LR-7568, the silane coupling agent used is Momentive's silane coupling agent, and the base is sodium hydroxide.

[0028] The dispersant used is selected from Disponer 98502 of Deqian or Disponer 9832 of BYK Chemical.

[0029] The nano metal pigment used is selected from DEGUESS FW-200 of Degussa or Basf 0066K of BASF of Germany.

[0030] The leveling agent used is selected from BYK331 of BYK Chemical or FM-54002 of Noche Chemical.

[0031] The activator used is selected from T-12 of Qiti Chemical or KL-2 of Deqian.

[0032] The ultraviolet light absorber used is selected from BASF's UV-1130, UV-234 or UV-5312.

[0033] The light stabilizer used is selected from CHIMASSORB 944, UV-292 or UV-6222 of BASF.

[0034] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with preferred embodiments. Those skilled in the art should understand that the following contents are illustrative rather than restrictive, and should not be used to limit the scope of protection of the present invention. The one or more method steps mentioned in the present invention do not exclude that other method steps may also exist before and after the combination step. In the case of no substantial change in the technical content, they are all regarded as the scope of the present invention that can be implemented.

[0035] In the case of illustrating the purpose of the present invention through the following examples, the components are all based on parts by weight. Unless otherwise specified, for the sake of simplicity, the "parts" described in the examples of the present invention have the same meaning as parts by weight.

[0036] The silane-modified high-hydroxyl environmentally friendly acrylic resin used in this embodiment is prepared by mixing high-hydroxyl environmentally friendly acrylic resin and silane coupling agent (Momentive) in a mass ratio of 30:1, adding 0.5% sodium hydroxide by mass of the high-hydroxyl environmentally friendly acrylic resin, and mixing and stirring for 180 minutes at 140°C and a rotation speed of 800 r / min. Example

[0037] (1) 70 parts of silane-modified high-hydroxyl environmentally friendly acrylic resin, 7.2 parts of organic solvent butyl acetate, 2.2 parts of organic solvent propylene glycol methyl ether, 2.8 parts of organic solvent dipropylene glycol methyl ether, and 0.6 parts of dispersant (Disponer 98502) were slowly added in sequence under stirring conditions, and stirred at a medium speed of 800 rpm until mixed uniformly to prepare a mixture A; (2) Slowly add 4.1 parts of nano metal pigment (Basf 0066K) into mixture A while stirring at a low speed of 450 rpm, stir until the nano metal pigment is completely coated, and then stir at a high speed of 1300 rpm for about 30 minutes to fully mix the nano metal pigment and mixture A to obtain mixture B; (3) Add mixture B to a sand mill and grind to a fineness of ≤5µm, filter, and then stir at a medium speed of 800 rpm. Add 0.3 parts of leveling agent (BYK331), 0.3 parts of activator (T-12), 1.4 parts of ultraviolet light absorber (UV-5312), 0.8 parts of light stabilizer (UV-6222), and 10.8 parts of organic solvent butyl acetate in sequence, then stir at a high speed of 1300 rpm for about 30 minutes until the mixture is evenly mixed. Let it stand for 15 minutes, filter and package to obtain the finished product.

[0038] Comparative Example 1 (1) 67.7 parts of high-hydroxyl environmentally friendly acrylic resin (Dianal LR-7568), 7.2 parts of organic solvent butyl acetate, 2.2 parts of organic solvent propylene glycol methyl ether, 2.8 parts of organic solvent dipropylene glycol methyl ether, and 0.6 parts of dispersant (Disponer 98502) were slowly added in sequence under stirring conditions, and stirred at a medium speed of 800 rpm until mixed uniformly to prepare a mixture A; (2) Slowly add 4.1 parts of nano metal pigment (Basf 0066K) into mixture A while stirring at a low speed of 450 rpm, stir until the nano metal pigment is completely coated, and then stir at a high speed of 1300 rpm for about 30 minutes to fully mix the nano metal pigment and mixture A to obtain mixture B; (3) Add mixture B to a sand mill and grind to a fineness of ≤5µm, filter, and then stir at a medium speed of 800 rpm. Add 0.3 parts of leveling agent (BYK331), 0.3 parts of activator (T-12), 2.3 parts of silane coupling agent (Maitu), 1.4 parts of ultraviolet light absorber (UV-5312), 0.8 parts of light stabilizer (UV-6222), and 10.8 parts of organic solvent butyl acetate in sequence. Then stir at a high speed of 1300 rpm for about 30 minutes until the mixture is evenly mixed. Let it stand for 15 minutes, filter and package to obtain the finished product.

[0039] Comparative Example 2 (1) 67.7 parts of high-hydroxyl environmentally friendly acrylic resin (Dianal LR-7568), 7.2 parts of organic solvent butyl acetate, 2.2 parts of organic solvent propylene glycol methyl ether, 2.8 parts of organic solvent dipropylene glycol methyl ether, and 0.6 parts of dispersant (Disponer 98502) were slowly added in sequence under stirring conditions, and stirred at a medium speed of 800 rpm until mixed uniformly to prepare a mixture A; (2) Slowly add 4.1 parts of nano metal pigment (Basf 0066K) into mixture A while stirring at a low speed of 450 rpm, stir until the nano metal pigment is completely coated, and then stir at a high speed of 1300 rpm for about 30 minutes to fully mix the nano metal pigment and mixture A to obtain mixture B; (3) Add mixture B to a sand mill and grind to a fineness of ≤5µm, filter, and then stir at a medium speed of 800 rpm. Add 0.3 parts of leveling agent (BYK331), 0.3 parts of activator (T-12), 2.3 parts of N-[3-(trimethoxysilyl)propyl]ethylenediamine, 1.4 parts of ultraviolet light absorber (UV-5312), 0.8 parts of light stabilizer (UV-6222), and 10.8 parts of organic solvent butyl acetate in sequence. Then stir at a high speed of 1300 rpm for about 30 minutes until the mixture is evenly mixed. Let it stand for 15 minutes, filter and package to obtain the finished product.

[0040] Performance testing of the finished products obtained in the embodiments and comparative examples Table 1 Basic performance test of the obtained products

[0041] From the comparison in Table 1, it can be seen that although the products prepared by different methods are qualified in the adhesion test, in the more stringent water boiling resistance test, only the example product prepared by using silane-modified high-hydroxyl environmentally friendly acrylic resin does not fall off or crack after being boiled in water at 55°C for 1000 hours, which meets the high standards of automotive interior paint.

[0042] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. An environmentally friendly automotive interior paint, characterized in that: By weight, the raw materials used and their amounts are as follows: 60-70 parts of silane-modified high-hydroxyl environmentally friendly acrylic resin; Dispersant 0.5-1.5 parts; 3.0-5.0 parts of nano metal pigment; Leveling agent 0.1-0.5 parts; Activator 0.2-0.4 parts; 1.0-2.0 parts of ultraviolet light absorber; Light stabilizer 0.6-1.0 part; 10-30 parts of organic solvent.

2. The environmentally friendly automotive interior paint according to claim 1, characterized in that: The silane-modified high-hydroxyl environmentally friendly acrylic resin is prepared by mixing high-hydroxyl environmentally friendly acrylic resin and silane coupling agent in a mass ratio of 30:1, adding alkali as a catalyst, and mixing and stirring for 180 minutes at 140° C. and a rotation speed of 800 r / min; Among them, the high-hydroxyl environmentally friendly acrylic resin is selected from one or more of Nupes Setalux 1192SS-60 or Mitsubishi Rayon Chemical Dianal LR-7568; the alkali is sodium hydroxide, and its added amount is 0.5% of the mass of the high-hydroxyl environmentally friendly acrylic resin used.

3. The environmentally friendly automotive interior paint according to claim 1, characterized in that: The dispersant is one or more of a polyurethane polymer, a polyurethane oligomer or a high molecular weight block copolymer.

4. The environmentally friendly automotive interior paint according to claim 1, characterized in that: The nano metal pigment is selected from one or more of Degussa DEGUESS FW-200 and BASF Basf 0066K.

5. The environmentally friendly automotive interior paint according to claim 1, characterized in that: The leveling agent is one or more of a fluorocarbon modified acrylic ester leveling agent, a polyether modified polymethyl alkyl siloxane leveling agent or an acrylic copolymer leveling agent.

6. The environmentally friendly automotive interior paint according to claim 1, characterized in that: The activator is one or more of an inorganic acid activator, an alkali activator or an organic compound activator.

7. The environmentally friendly automotive interior paint according to claim 1, characterized in that: The ultraviolet light absorber is one or more of BASF UV-1130, UV-234 or UV-5312.

8. The environmentally friendly automotive interior paint according to claim 1, characterized in that: The light stabilizer is a high molecular weight hindered amine light stabilizer, and the high molecular weight hindered amine light stabilizer includes one or more of BASF CHIMASSORB 944, UV-292 or UV-6222.

9. The environmentally friendly automotive interior paint according to claim 1, characterized in that: The organic solvent is one or more of an ester solvent or an aromatic hydrocarbon solvent.

10. The environmentally friendly automotive interior paint according to claim 1, characterized in that: The preparation method thereof comprises the following steps: (1) dissolving a silane-modified high-hydroxyl environmentally friendly acrylic resin and a dispersant in a portion of an organic solvent and mixing them uniformly to obtain a mixture A; (2) Slowly adding the nano metal pigment into the mixture A under low-speed stirring, stirring until the pigment is completely coated, and then stirring at high speed to fully mix the pigment and the mixture A to obtain a mixture B; (3) Grind the mixture B to a fineness of ≤5 μm, filter, and then sequentially add a leveling agent, an activator, an ultraviolet light absorber, a light stabilizer, and the remaining organic solvent under medium-speed stirring, and then stir at a high speed until the mixture is uniform, let it stand, and filter to obtain the automotive high-grade environmentally friendly interior paint.

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