CN103788796A - Nano-titanium dioxide automobile topcoat coating - Google Patents
Nano-titanium dioxide automobile topcoat coating Download PDFInfo
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- CN103788796A CN103788796A CN201410049581.8A CN201410049581A CN103788796A CN 103788796 A CN103788796 A CN 103788796A CN 201410049581 A CN201410049581 A CN 201410049581A CN 103788796 A CN103788796 A CN 103788796A
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Abstract
The invention discloses a nano-titanium dioxide automobile topcoat coating. The nano-titanium dioxide automobile topcoat coating is characterized by being prepared from the following raw materials in parts by weight: 55-70 parts of titanium dioxide slurry, 8.5-21.4 parts of nano-titanium dioxide slurry, 6-8 parts of polar resin, 0.2-0.4 part of a flatting agent and 15-20 parts of a dispersing agent, wherein the nano-titanium dioxide slurry comprises the following components in percentage by mass: 88 percent of hydroxy acrylic resin, 7 percent of nano-titanium dioxide, 2 percent of dimethylbenzene, 2.6 percent of butyl alcohol and 0.4 percent of butyl acetate; the particle diameter of the nano-titanium dioxide is 65-130 nanometers; the dispersing agent is the combination of butyl alcohol, butyl acetate and dimethylbenzene. By adopting the coating, the agglomeration, flocculation and dispersion of titanium dioxide are avoided, and stable ultraviolet resistance, high hardness and high compactness are realized.
Description
Technical field
The present invention relates to a kind of car paint, particularly a kind of nano titanium oxide automobile finish coating.
Background technology
Paint spraying is one of main technique of automobile and motorcycle manufacture, and it plays decoration provide protection, can improve the class of product.Along with developing rapidly of domestic and international automobile and motorcycle and adding of WTO, product competition is increasingly sharpened, each producer is all in quality, kind, moulding, carry out improvement and bring new ideas in appearance, and the innovation that automobile and motorcycle overall appearance is decorated and the raising in paint film work-ing life are particularly important to increasing the competitive capacity of product.
Current existing Automotive Paint Film Properties outward appearance is under the irradiation of UV sunlight, and the catabiosis such as through use after a while, paint film appearance can produce variable color, be full of cracks, efflorescence, come off, makes paint film lose protection and decorative effect, has reduced the work-ing life of paint film.Therefore, improve ageing-resistant performance and the work-ing life of automobile and motorcycle outward appearance coating, have great importance for the competitive capacity and the economic benefit that improve product.
Nano material is the most dynamic in current novel material research field, the future economy and social development are had to the very research object of material impact, because it has peculiar performance and wide application prospect, be described as cross-centennial novel material, attract the particularly great attention of developed country of countries in the world, the a large amount of manpower and materials of numerous and confused input are carried out deep research and development, " Star War " plan of for example U.S., " UIT learn a skill propelling cause " of Japan, " You Lika " plan in West Europe waits and all coincidentally nano material is defined as to emphasis brainstorm subject.In addition, the U.S. also comes into effect " national nanotechnology advances plan " in calendar year 2001, to seize the commanding elevation in this field.Under this international background, the Chinese government also pays much attention to, and successively nano material technology research is listed in the scientific effort such as " 863 ", " 973 ", and dropping into a large amount of manpower and materials carries out research of technique, obtained the achievement of a collection of novelty, [1] in the world occupies a tiny space.China is the development that promotes nanotechnology recently, set up national nanotechnology research steering committee, a collection of nano materials research and production base are determined, for the development of nano material is laid a good foundation, estimate that nanotechnology is the most potential high-tech technology of 21 century, will bring another Industrial Revolution.Nano material refers to and is made up of ultrafine particle (claiming again nanoparticle), the solid material of characteristic dimension size < 100nm.The structure of nanoparticle is atom or molecular former subgroup or the molecular group less by number, be in the transitional region that cluster and macro object have a common boundary, nanoparticle surface atom is all unordered amorphous layer of long-range and short distance, and at particle core, there is the atom of complete crystallization periodic arrangement, but its structure and body sample are slightly different, and from common, about microcosmic and macroscopical viewpoint, such system is also atypical macrosystem of atypical microscopic system both.Just because of this special construction type of nanoparticle, make it there is the large effect of conventional fines not available four, it is quantum size effect, small-size effect, surface effects, and macro quanta tunnel effect, thereby show much peculiar optics, calorifics, electricity, magnetics, mechanics, physics, chemical property, these performances can be used for the traditional coating of modification, for example Chinese patent application CN103013314A discloses a kind of nanometer aqueous automobile paint and preparation method thereof, in this coating, contain nano titanium oxide, there is hardness high, snappiness is good, shock-resistant, the advantage of UV resistant.Because nano material is the subparticle that general microscope all be can't see, surfactivity is quite high, and therefore current nano material is added in base-material and is mixed with after coating, and nano material is easily further reunited, flocculation, disperses unstable.Therefore how being distributed among base-material, is the gordian technique that nano material is applied in coating, and this also becomes the emphasis problem of current insider's research.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of uvioresistant of titanium dioxide reunion, flocculation, stably dispersing, nano titanium oxide automobile finish coating that hardness is good, compactness is good avoided.
Technical scheme of the present invention is as follows: a kind of nano titanium oxide automobile finish coating, is characterized in that: the following starting material by parts by weight make, titanium dioxide slurry 55-70 part, Nanometer Titanium Dioxide slurry 8.5-21.4 part, polar resin 6-8 part, flow agent 0.2-0.4 part, dispersion agent 15-20 part; Described Nanometer Titanium Dioxide is starched by calculating by mass 88% Hydroxylated acrylic resin, 7% nano titanium oxide, 2% dimethylbenzene, 2.6% butanols and 0.4% butylacetate, and the particle diameter of wherein said nano titanium oxide is 65-130nm;
Described dispersion agent is the combination of butanols, butylacetate, dimethylbenzene.
As preferably: described polar resin is Hydroxylated acrylic resin and/or aminoresin.
As preferably: described titanium dioxide slurry by calculating by mass 88% Hydroxylated acrylic resin, 7% titanium dioxide, 2% dimethylbenzene, 2.6% butanols and 0.4% butylacetate forms.
Described coating is prepared in accordance with the following steps:
(1), the preparation of Nanometer Titanium Dioxide slurry, Hydroxylated acrylic resin, nano titanium oxide, dimethylbenzene, butanols, butylacetate are added in stirrer, high-speed stirring makes to mix, and then grinds and obtains Nanometer Titanium Dioxide slurry;
(2), above-mentioned Nanometer Titanium Dioxide slurry, titanium dioxide slurry, polar resin, flow agent dispersion agent are added in stirrer, stir and make product.
In technique scheme: in described step (1), the time of grinding is 5-6 hour.
In technique scheme: in described step (1), the stirring velocity of high-speed stirring is 1200～1300r/min.
Beneficial effect: compared with prior art the present invention has the following advantages:
(1), the particle diameter of the nano titanium oxide selected of the present invention is 65-130nm, first, the particle size range of nano titanium oxide is large, preparation technology is simple; Secondly, in finish paint coating, add nano material TiO
2, can shield the ultraviolet ray in sunlight, significantly improve the ageing-resistant performance of paint film, nano material TiO
2to ultraviolet shielding, take scattering as main, particle diameter is one of important factor affecting scattering power, by calculating the nano material TiO that particle diameter is 65～130nm
2performance the best of shielding ultraviolet rays.
(2), the content of titanium dioxide of the present invention converts and gets off to be about 0.6%-1.5%, content of titanium dioxide is lower.Content is too low does not have shielding ultraviolet rays, aging-resistant effect, and content too high increase paint film fragility is also wasted material.The coating snappiness of selecting content of the present invention to make is good, has reduced the fragility of paint film, reduces nano material and reunites, and has increased compactness.
(3), Nanometer Titanium Dioxide slurry is selected the more intense hydroxyl acrylic resin of polarity, select composite dispersing agent (combination of butanols, butylacetate, dimethylbenzene) simultaneously, the polarity on general inorganic nano-particle surface is all stronger, therefore require macromolecule resin to contain polar group, like this can adsorbed polymer in nanoparticle surface, play coating function and after avoiding nanoparticle to disperse, agglomeration occurs again, especially hydroxyl acrylic resin is as filmogen.Optimize composite dispersing agent as nanoparticle dispersion agent, prepare burden by a certain percentage, by high-speed stirring, grinding, nanoparticle is dispersed in resin in advance, make Nanometer Titanium Dioxide slurry, dispersion effect is good, and polar resin is coated by nano material, avoid reuniting, keep the stability of nano paint.
(4), add nano material TiO2, glossiness, the ageing-resistant performance of paint film improved a lot than originally, ultraviolet-resistant aging performance improves more than 20%.Add nano-TiO
2having improved gloss, hardness, the water tolerance of paint film, is because nano-TiO
2add the planarization, the compactness that have improved paint film, reduced the uneven of coating surface microcosmic, strengthened reflection of light ability.Because the organic coating after solidifying is a polymer reticulated structure on microcosmic, the mean diameter of its structure pore is 10
-5～10
-7cm, and the molecular diameter of water only has 10 conventionally
-6～10
-8cm, therefore organic coating has water-permeable, nano-TiO
2add and just in time filled organic coating unavoidable " structure hole ", increased the compactness of coating, theoretically, can form the almost dense coating of atresia, therefore increased gloss, hardness, the water tolerance of paint film.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1, the preparation of Nanometer Titanium Dioxide slurry
The Hydroxylated acrylic resin that is 88% by massfraction, 7% nano titanium oxide, 2% dimethylbenzene, 2.6% butanols, 0.4% butylacetate add in stirrer, and high-speed stirring makes to mix, and stirring velocity is 1200～1300r/min.Then grind and within 5-6 hour, obtain Nanometer Titanium Dioxide slurry;
The preparation of embodiment 2 titanium dioxide slurries
The Hydroxylated acrylic resin that is 88% by massfraction, 7% titanium dioxide, 2% dimethylbenzene, 2.6% butanols, 0.4% butylacetate add in stirrer, high-speed stirring makes to mix, stirring velocity is 1200～1300r/min, then grinds and within 5-6 hour, obtains titanium dioxide slurry;
Embodiment 3
By 60 parts of titanium dioxide slurries, 14 parts, the Nanometer Titanium Dioxide making slurry, 1,158 7 parts, aminoresin, 0.3 part of flow agent, 8.7 parts, butanols, 10 parts of butylacetates are uniformly mixed and obtain product in stirrer.The content of nano titanium oxide is 0.98%.
Embodiment 4
By 63.1 parts of titanium dioxide slurries, 8.5 parts, the Nanometer Titanium Dioxide making slurry, part, 1,158 4 parts, aminoresin, 4 parts of Hydroxylated acrylic resins, 0.4 part of flow agent, 10 parts, butanols, 10 parts of butylacetates are uniformly mixed and obtain product in stirrer.Nanometer titanium dioxide titanium content 0.6%.
Embodiment 5
By 57.3 parts of titanium dioxide slurries, 21.4 parts, the Nanometer Titanium Dioxide making slurry, part, 1,158 6 parts, aminoresin, 0.3 part of flow agent, 5 parts of dimethylbenzene, 10 parts of butylacetates are uniformly mixed and obtain product in stirrer.Nanometer titanium dioxide titanium content 1.5%.
Embodiment 6
By 55 parts of titanium dioxide slurries, 21.4 parts, the Nanometer Titanium Dioxide making slurry, part, 1,158 8 parts, aminoresin, 0.3 part of flow agent, 5.3 parts, butanols, 10 parts of butylacetates are uniformly mixed and obtain product in stirrer.Nanometer titanium dioxide titanium content 1.5%.
Embodiment 7
By 65 parts of titanium dioxide slurries, 13.7 parts, the Nanometer Titanium Dioxide making slurry, 1,158 6 parts, aminoresin, 0.3 part of flow agent, 5 parts, butanols, 10 parts of dimethylbenzene are uniformly mixed and obtain product in stirrer.Nanometer titanium dioxide titanium content 1.5%.
The present invention is filled a prescription after paint and sprays sample, coolly put levelling 8 minutes, then dry, stoving process is 120 ± 2 ℃, 1 hour.Cool putting after 12 hours carried out performance test to paint film.
One, the gloss of film making detects (GB/T9754-88)
Utilizing input angle is the SCY-1 type portable digital glarimeter measurement gloss of film of 60 °, and measuring result is that gloss of film of the present invention is 83-95.The gloss of film that does not add nano titanium oxide is 70-80, can find out and add nano-TiO
2can improve the gloss of paint film, along with nano-TiO
2the gloss of the increase paint film of add-on also increases, but works as nano-TiO
2when add-on continues to increase, gloss of film increases slowly.
Two, film thickness is measured
Utilize SCH-2 type electromagnetic method digital thickness gauge to measure the film thickness of sample, see that whether film thickness is even, the comparability of guaranteed performance.Test-results show that each sample film thickness is substantially even.
Three paint film adhesions are measured (GB/T9286-88)
The utilization method of drawing a circle is measured the sticking power of paint film, and use instrument is adherometer, and the paint film adhesion of coating of the present invention is one-level, but in the time that nano TiO 2 content is 3%, paint film adhesion is reduced to 2 grades, and nano TiO 2 too high levels has increased due to the fragility of paint film.
Four, paint film impact strength is measured (GB/T1732-93)
Utilize paint film impactor to carry out impact strength mensuration to paint film, the resistance to impact shock that draws paint film of the present invention is 50kg.cm.
Five, hardness of paint film is measured
Utilize pendulum-rocker hardness meter to carry out measurement of hardness to paint film, hardness of the present invention is 0.55-0.6, adds nano TiO 2 can improve the hardness of paint film.
Six, paint film water tolerance test (GB/T1733-93)
The half area of model is put into distilled water, and 40 ℃ are soaked 120 hours, then model are taken out in water, blot the globule with filter paper, check that paint film appearance is unchanged, without peeling off, the phenomenon such as foaming, wrinkling, variable color.
Seven, paint film ultraviolet-resistant aging experiment (GB/1865-1989)
Analyze in theory and in paint film, add nano material TiO
2, can shield the ultraviolet ray in sunlight, improve the ageing-resistant performance of paint film, this experiment utilizes artificial accelerated aging laboratory method to carry out ultraviolet-resistant aging test to model, to detect the effect of nano material TiO2 in paint film.Experimental installation is LH-2 type Weatherometer, writing time from starting experiment, make regular check on paint film appearance situation, in the time that paint film appearance comprehensive grading reaches middle rank, stop irradiating experiment (when loss of gloss, variable color, efflorescence, crackle, foaming appear in paint film appearance), the time used is the ageing-resistant time of paint film.Result is that the ageing-resistant time of the present invention is 220-225 hour.
From above experimental result, nano-TiO
2add the impact of paint film adhesion, impact strength not quite, but in the time that nano TiO 2 content is higher, sticking power, the shock strength of paint film have downtrending, because nano-TiO
2too high levels, what coating pore was filled out is too real close, has reduced the snappiness of coating, has increased due to the fragility of paint film.And reunion has occurred nanoparticle when film forming, matrix is isolated to effect.Therefore nano-TiO
2content can not be too high.
Claims (6)
1. a nano titanium oxide automobile finish coating, is characterized in that: the following starting material by parts by weight make, titanium dioxide slurry 55-70 part, Nanometer Titanium Dioxide slurry 8.5-21.4 part, polar resin 6-8 part, flow agent 0.2-0.4 part, dispersion agent 15-20 part; Described Nanometer Titanium Dioxide is starched by calculating by mass 88% Hydroxylated acrylic resin, 7% nano titanium oxide, 2% dimethylbenzene, 2.6% butanols and 0.4% butylacetate, and the particle diameter of wherein said nano titanium oxide is 65-130nm;
Described dispersion agent is the combination of at least two kinds in butanols, butylacetate, dimethylbenzene.
2. nano titanium oxide automobile finish coating according to claim 1, is characterized in that: described polar resin is Hydroxylated acrylic resin and/or aminoresin.
3. nano titanium oxide automobile finish coating according to claim 1, is characterized in that: described titanium dioxide slurry by calculating by mass 88% Hydroxylated acrylic resin, 7% titanium dioxide, 2% dimethylbenzene, 2.6% butanols and 0.4% butylacetate forms.
4. according to nano titanium oxide automobile finish coating described in claim 1 or 2 or 3, it is characterized in that: preparation in accordance with the following steps:
(1), the preparation of Nanometer Titanium Dioxide slurry, Hydroxylated acrylic resin, nano titanium oxide, dimethylbenzene, butanols, butylacetate are added in stirrer, high-speed stirring makes to mix, and then grinds and obtains Nanometer Titanium Dioxide slurry;
(2), above-mentioned Nanometer Titanium Dioxide slurry, titanium dioxide slurry, polar resin, flow agent, dispersion agent are added in stirrer, stir and make product.
5. nano titanium oxide automobile finish coating according to claim 4, is characterized in that: in described step (1), the time of grinding is 5-6 hour.
6. according to claim 4 nano titanium oxide automobile finish coating, it is characterized in that: in described step (1), the stirring velocity of high-speed stirring is 1200～1300r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410049581.8A CN103788796A (en) | 2014-02-11 | 2014-02-11 | Nano-titanium dioxide automobile topcoat coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410049581.8A CN103788796A (en) | 2014-02-11 | 2014-02-11 | Nano-titanium dioxide automobile topcoat coating |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105219201A (en) * | 2015-11-14 | 2016-01-06 | 胡运冲 | A kind of nanometer modified high-solid body part automobile finish and preparation method thereof |
| CN105462413A (en) * | 2015-12-28 | 2016-04-06 | 杭州名匠建筑装饰工程有限公司 | High-strength low-covering-thickness high-grade nano finish paint for vehicles and preparation method thereof |
| CN105694636A (en) * | 2016-04-27 | 2016-06-22 | 柳州申通汽车科技有限公司 | Automobile coating and preparation method thereof |
| CN106590257A (en) * | 2016-12-21 | 2017-04-26 | 重庆中鼎三正科技有限公司 | Nano titanium dioxide automobile finish paint |
| CN108047784A (en) * | 2017-12-25 | 2018-05-18 | 中山市得高行知识产权中心（有限合伙） | A kind of UV showerings flexibility light top coat top coat coating |
| CN114456654A (en) * | 2021-12-30 | 2022-05-10 | 东来涂料技术（上海）股份有限公司 | Self-cleaning automobile coating and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105219201A (en) * | 2015-11-14 | 2016-01-06 | 胡运冲 | A kind of nanometer modified high-solid body part automobile finish and preparation method thereof |
| CN105462413A (en) * | 2015-12-28 | 2016-04-06 | 杭州名匠建筑装饰工程有限公司 | High-strength low-covering-thickness high-grade nano finish paint for vehicles and preparation method thereof |
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| CN106590257A (en) * | 2016-12-21 | 2017-04-26 | 重庆中鼎三正科技有限公司 | Nano titanium dioxide automobile finish paint |
| CN108047784A (en) * | 2017-12-25 | 2018-05-18 | 中山市得高行知识产权中心（有限合伙） | A kind of UV showerings flexibility light top coat top coat coating |
| CN114456654A (en) * | 2021-12-30 | 2022-05-10 | 东来涂料技术（上海）股份有限公司 | Self-cleaning automobile coating and preparation method thereof |
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Application publication date: 20140514 |