CN102358807B - Hydrophobic nano composite automobile finish and preparation method thereof - Google Patents
Hydrophobic nano composite automobile finish and preparation method thereof Download PDFInfo
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- CN102358807B CN102358807B CN201110215930.5A CN201110215930A CN102358807B CN 102358807 B CN102358807 B CN 102358807B CN 201110215930 A CN201110215930 A CN 201110215930A CN 102358807 B CN102358807 B CN 102358807B
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Abstract
The invention provides a hydrophobic nano composite automobile finish which has hydrophobic and self-cleaning capacities, and a preparation method for the composite automobile finish. Nano silicon dioxide is treated by nano dispersion, and is dispersed into various components of an acrylic automobile finish under the cavitation of ultrasonic waves, and the acrylic finish is modified. The automobile finish has the characteristics of high adhesion, high hardness, high bending strength, water, acid, alkali and gasoline resistance, hydrophobicity, self cleaning, pollution and dust prevention and the like.
Description
Technical field
The invention provides a kind of hydrophobic nano composite automobile finish, there is hydrophobic, automatically cleaning ability, disclose the preparation method of this composite automobile finish simultaneously, belong to the guard technology field of car surface.
Background technology
In recent years, hydrophobic film has had more wide application in the numerous areas such as scientific research and industrial and agricultural production, people's daily life.Hydrophobic technology also has realistic meaning for building industry, metal industry etc. antiseptic and rustproof and antifouling very much.Particularly the high speed development of the new and high technology such as microelectronic system, photoelectron element and nanosecond science and technology in recent years, gives the research of hydrophobic coating and is applied to vitality.But the automobile finish with hydrophobicity and automatically cleaning ability that up to this point, still there is no a kind of moulding can directly apply to automobile shows spraying.At present, fewer, wherein comparatively successful for the research of the hydrophobicity aspect of automobile finish both at home and abroad, as German eazY Clean Technologies company has produced the coating using for automobile and ship surface; And Harbin Research Inst. of Chemical Industry develop a kind of sticking power good, smooth transparent, didirtresistance is strong, for the hydrophobic coating of automobile finish, it is main body that this coating adopts novel modified silicon oil, after Over emulsfication, make emulsion, can be sprayed at automobile finish surface, the dry rear stability coating that forms.This coating is coated in former automobile finish surface, is similar to car surface waxing the latter and seals glaze, and hydrophobicity is not the character that automobile finish directly has.In addition, this coating persistence is poor, needs periodic replacement.And cost is quite high, can not popularizes production and can not replace existing automobile finish coating direct spraying on priming paint and floating coat.Therefore, there is hydrophobic automobile finish and there is very great theoretical investigation value and actual application value.
Summary of the invention
The invention discloses a kind of hydrophobic nano composite automobile finish, hydrophobicity, automatically cleaning ability are incorporated into automobile finish field, make car surface can there is hydrophobic and automatically cleaning ability, can save a large amount of car washing waters and cost, and strengthen to a certain extent the antiseptic power of automobile.
The invention also discloses a kind of preparation method of hydrophobic nano composite automobile finish, cost is lower, technique is simple, be convenient to suitability for industrialized production.
hydrophobic nano composite automobile finish of the present invention,it is characterized in that by following raw materials by weight portion than making:
Nano silicon 0.4 ~ 50; Acrylic type automobile finish 50 ~ 150; Nano-dispersed auxiliary agent 0.2 ~ 20; Organic solvent 20 ~ 200.
Described nano dispersion fluid auxiliary agent is selected from the one in 3-triethoxysilyl-1-propylamine and γ-glycidyl ether oxygen propyl trimethoxy silicane.
It is mixed with one or both in dimethylbenzene that described organic solvent is selected from ethyl acetate.
hydrophobic nano composite automobile finish of the present inventionproduction technique comprises the following steps:
1) nano dispersion fluid auxiliary agent liquid is put into reactor, add above-mentioned organic solvent, stir 20 ~ 40 minutes (rotating speed is 300 ~ 800 revs/min), keep whipped state, then add nano silicon, obtain nano silicon dispersion liquid; By ultrasonic wave nano material separating apparatus, dispersion treatment 20 ~ 40 minutes, temperature is 30 ~ 55 ℃, and ultrasonic frequency is 20 ~ 40kHz.
2) automobile finish is added in reactor, controlling temperature is 30 ~ 40 ℃, and rotating speed is to stir 1 ~ 2 hour under 200 ~ 1000 revs/min of conditions, makes it abundant mixing, and state is even, stable.
3) by step 2) finish paint put into ultrasonic wave separating apparatus, disperse 30 ~ 90 minutes by ultrasonic wave, temperature is 30 ~ 55 ℃, ultrasonic frequency is 20 ~ 40kHz, suction filtration except desolventizing, obtains hydrophobic top coat of the present invention.
below experiment shows why hydrophobic nano composite acrylic acid automobile finish of the present invention has good hydrophobicity:
In order to verify effect of the present invention and to explain better the mechanism of the hydrophobic interaction of this dewatering nano composite automobile finish, after the hydrophobic nano composite automobile finish that the present invention is obtained and former automobile finish spray, measure respectively the contact angle of water on its coating surface with German Dataphysics OCA20 contact angle measurement, as shown in Figure 3, observe the configuration of surface of finish paint coating surface of the present invention by scanning electronic microscope (SEM), as shown in Figure 1; X-ray photoelectron spectroscopic analysis instrument (XPS) is analyzed the chemical constitution of coating surface of the present invention, as shown in Figure 2.SEM observes the surfaceness and the configuration of surface that focus on observing coating surface, and whether XPS analysis focuses on analyzing nano silicon (take element silicon as mark) and be dispersed in uniformly among paint film and on the surface of paint film.
Former coating surface water contact angle is only 80.3 ° (referring to Fig. 3 a), (see Fig. 3 b), obviously the present invention has hydrophobic effect clearly and the contact angle of hydrophobic nano composite automobile finish surface water of the present invention reaches 139.9 ° as seen from Figure 3.Under scanning electronic microscope, observe, find even about 10 microns to 30 microns of the diameter that must distribute of coating surface of the present invention projection (Fig. 1 a), and each projection be that more nano level little laminate structures form that (Fig. 1 b) by diameter.This micro-nano secondary structure is from the nanometer silicon dioxide particle adding caused (Fig. 2, nano silicon is dispersed on the surface of paint film).And the microtexture of this micro-nano secondary structure and lotus leaf surface is closely similar.This structure is just the major cause that lotus leaf has super-hydrophobicity.The existence of this micro-nano secondary structure just makes the vinylformic acid automobile finish of nano composite material of the present invention just have good hydrophobic interaction just.Visible, the present invention has important theoretical investigation value and actual application value.
positively effect of the present invention is:nano silicon is processed with nano dispersion fluid, and utilize hyperacoustic cavatition to be distributed in each component of vinylformic acid automobile finish, acrylic acid top-coat is carried out to modification, automobile finish has that sticking power is good, hardness is high, flexural strength is large, water-fast, acidproof, alkaline-resisting, resistance to gasoline, hydrophobic automatically cleaning, the antifouling feature such as dustproof.There is high water contact angle and low surface energy.Resistance to chemical attack and automatic cleaning action, reduced water the residence time of lacquer painting and with the touch opportunity of metal substrate, there is the effect of opposing automobile metal material corrosion.Paint film ply adhesion is good, and hardness of paint film is high, flexural strength is large, has good mechanical mechanics property, and and floating coat between have good binding ability.Glossiness is high, and color is bright and new, and state is evenly fine and smooth, shelf-stable, and sight is strong.Uvioresistant, temp. variation resistant, weather resisteant are good, finish paint long service life.Be applicable to the environment of the severe area of weather condition and various deep-etchings.
Accompanying drawing explanation
Fig. 1 is the electron scanning micrograph of automobile finish film surface of the present invention;
Fig. 2 is the XPS analysis result of automobile finish film of the present invention;
Fig. 3 is the photo that has sprayed respectively the coating surface water contact angle of general-utility car finish paint (a) and automobile finish of the present invention (b).
embodiment:
By further distance description the present invention of following examples, and do not limit the present invention in any way, any change that those of ordinary skills made for the present invention easily realize or change do not deviating under the prerequisite of technical solution of the present invention, within all will fall into claim scope of the present invention.
embodiment 1
3-triethoxysilyl-1-propylamine of 20g is put into reactor, add 200g ethyl acetate, 170g dimethylbenzene, stir 30 minutes (rotating speed is 600 revs/min), keep whipped state, add again 50g nano silicon, obtain nano silicon dispersion liquid; By ultrasonic wave nano material separating apparatus, dispersion treatment 30 minutes, temperature is 45 ℃, and ultrasonic frequency is 30kHz.
500g automobile finish (being selected from firm determination acrylic type automobile finish 2k52) is added in reactor, and controlling temperature is 35 ℃, stirs 1.5 hours (rotating speed is 400 revs/min), makes it abundant mixing, and state is even, stable.Mixing solutions is put into ultrasonic wave separating apparatus, disperse 60 minutes by ultrasonic wave, temperature is 45 ℃, and ultrasonic frequency is 30kHz, and suction filtration, except desolventizing, obtains hydrophobic top coat of the present invention.
embodiment 2
γ-glycidyl ether oxygen propyl trimethoxy silicane of 20g is put into reactor, add 400g ethyl acetate, stir 40 minutes (rotating speed is 400 revs/min), keep whipped state, then add 50 nano silicons, obtain nano silicon dispersion liquid.By ultrasonic wave nano material separating apparatus, dispersion treatment 20 minutes, temperature is 30 ℃, and ultrasonic frequency is 40kHz.
500g automobile finish (being selected from firm determination acrylic type automobile finish RZ9000) is added in reactor, and controlling temperature is 30 ℃, stirs 1 hour (rotating speed is 800 revs/min), makes it abundant mixing, and state is even, stable.Mixing solutions is put into ultrasonic wave separating apparatus, disperse 45 minutes by ultrasonic wave, temperature is 30 ℃, and ultrasonic frequency is 40kHz, and suction filtration, except desolventizing, obtains hydrophobic top coat of the present invention.
embodiment 3
3-triethoxysilyl-1-propylamine of 50g is put into reactor, add 500g dimethylbenzene, stir 20 minutes (rotating speed is 800 revs/min), keep whipped state, then add 55g nano silicon, obtain nano silicon dispersion liquid; By ultrasonic wave nano material separating apparatus, dispersion treatment 40 minutes, temperature is 55 ℃, and ultrasonic frequency is 20kHz.
600g automobile finish (being selected from firm determination acrylic type automobile finish 1KS22B) is added in reactor, and controlling temperature is 40 ℃, stirs 2 hours (rotating speed is 300 revs/min), makes it abundant mixing, and state is even, stable.Mixing solutions is put into ultrasonic wave separating apparatus, disperse 90 minutes by ultrasonic wave, temperature is 55 ℃, and ultrasonic frequency is 20kHz, and suction filtration, except desolventizing, obtains hydrophobic top coat of the present invention.
Claims (1)
1. a hydrophobic nano composite automobile finish, it is characterized in that by following raw materials by weight portion than making:
Nano silicon 0.4 ~ 50; Acrylic type automobile finish 50 ~ 150; Nano dispersion fluid auxiliary agent 0.2 ~ 20; Organic solvent 20 ~ 200;
Described nano dispersion fluid auxiliary agent is selected from the one in 3-triethoxysilyl-1-propylamine and γ-glycidyl ether oxygen propyl trimethoxy silicane;
It is mixed with one or both in dimethylbenzene that described organic solvent is selected from ethyl acetate;
The production technique of described hydrophobic nano composite automobile finish, comprises the following steps:
1) nano dispersion fluid auxiliary agent liquid is put into reactor, add above-mentioned organic solvent, rotating speed is 300 ~ 800 revs/min, stirs 20 ~ 40 minutes, keeps whipped state, then adds nano silicon, obtains nano silicon dispersion liquid; By ultrasonic wave nano material separating apparatus, dispersion treatment 20 ~ 40 minutes, temperature is 30 ~ 55 ℃, and ultrasonic frequency is 20 ~ 40kHz;
2) automobile finish is added in reactor, controlling temperature is 30 ~ 40 ℃, and rotating speed is 200 ~ 1000 revs/min, stirs 1 ~ 2 hour, makes it abundant mixing, and state is even, stable;
3) by step 2) finish paint put into ultrasonic wave separating apparatus, disperse 30 ~ 90 minutes by ultrasonic wave, temperature is 30 ~ 55 ℃, ultrasonic frequency is 20 ~ 40kHz, suction filtration except desolventizing, to obtain final product.
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| CN201110215930.5A CN102358807B (en) | 2011-07-30 | 2011-07-30 | Hydrophobic nano composite automobile finish and preparation method thereof |
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| CN201110215930.5A CN102358807B (en) | 2011-07-30 | 2011-07-30 | Hydrophobic nano composite automobile finish and preparation method thereof |
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