CN110698979A

CN110698979A - Fluoride-free organic silicon self-cleaning slip-increasing liquid for vehicle paint and preparation method thereof

Info

Publication number: CN110698979A
Application number: CN201911032542.6A
Authority: CN
Inventors: 杨恩龙; 梁梓军; 杨恒
Original assignee: Shenzhen Zhenghai Innovative Materials Co Ltd
Current assignee: Shenzhen Zhenghai Innovative Materials Co Ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-01-17

Abstract

The invention belongs to the field of self-cleaning slip liquid, and discloses a fluoride-free organic silicon self-cleaning slip liquid for vehicle paint, which comprises the following raw materials in parts by weight: 5-30 parts of organic silicon monomer, 5-20 parts of organic titanium compound, 1-10 parts of adhesion promoter, 1-10 parts of organic acid and 20-70 parts of solvent. The invention also discloses a preparation method of the self-cleaning and lubricating liquid, an organic silicon self-cleaning and lubricating coating and a preparation method thereof. The self-cleaning slip-increasing liquid can enhance the ultraviolet resistance, wear resistance, compactness, smoothness and other capabilities of the surface of the automobile paint, does not crack or fall off, can protect the automobile paint from oxidation and brightness as new for a long time, is lubricated as jade, also protects the paint surface from being invaded by external dirt, and keeps the surface of the automobile paint smooth and bright for a long time.

Description

Fluoride-free organic silicon self-cleaning slip-increasing liquid for vehicle paint and preparation method thereof

Technical Field

The invention belongs to the field of self-cleaning slip liquid, and particularly relates to a fluoride-free organic silicon self-cleaning slip liquid for vehicle paint and a preparation method thereof.

Background

In daily life, automobiles, subways and high-speed rails become the most common transportation means for people to go out, and the transportation means not only bring convenience in life to people, but also improve the social operation efficiency and accelerate the progress and development of the society. Meanwhile, a plurality of complex atmospheric environmental pollutants easily cause the surface of the vehicle body to be stained and even oxidized and corroded, and the attractiveness of the vehicle is affected, so that the surface of the vehicle body needs to be frequently cleaned, and the cleaning operations not only cause huge labor cost, but also waste water resources.

In recent years, with the increasing awareness of environmental protection and energy conservation, surface modification with a self-cleaning function has been rapidly developed. The self-cleaning surface is a surface on which pollutants or dust on the surface of a substrate can automatically fall off or be degraded under the action of external force such as gravity, rainwater or wind power. The best example of a self-cleaning surface that performs in nature is that the lotus leaves always remain free of dust. Therefore, the preparation of the hydrophobic self-cleaning, smooth and bright protective coating has important practical significance for maintaining bright and bright appearance of the surface of the automobile paint for a long time.

The research on hydrophobic self-cleaning surface modification of different base materials is reported in many ways, and most of the research focuses on the application research of fluorine-containing materials because fluorine has the strongest electronegativity and small atomic radius, fluorine atoms are distributed spirally along carbon bonds, the intermolecular force is small, and the surface energy is very low. Therefore, researchers prefer to use fluorine-containing resins or other adhesion promoters to achieve hydrophobic self-cleaning surface functional modifications to substrates. There are also many reports of patents in this area, such as: chinese patent CN108300083A discloses a fluorine-containing copolymer/nano SiO₂The super-hydrophobic coating is prepared by preparing fluorine-containing copolymer from trifluoroethyl methacrylate and perfluoroalkyl ethyl acrylate and then adding nano SiO₂And spin-coating on the substrate to form the super-hydrophobic coating. The wear resistance of the coating obtained in the disclosed method is poor and cannot meet the requirements of practical application. Patent CN108587381A discloses a processing technology of UV-cured fluorine-containing abrasion-resistant hydrophobic coating, which comprises fluorine-containing silane, fluorine-containing acrylate and SiO₂/TiO₂The particles are bonded to improve the adhesion and hydrophobic properties of the coating. Although the fluorine-containing organosilicon material has excellent temperature resistance, weather resistance and solvent corrosion resistance, the fluorine-containing organosilicon material has high price and cost and limited application range. In addition, fluorine is a trace element required by human bodyOne of them is beneficial to the normal metabolism of the body, and fluoride is also required for dental treatment and health care, but fluorine is also a limited element of the human body, and is harmful to the human body when being excessively ingested. Ingestion of 150mg of fluorine in humans can cause a series of ailments, and if larger amounts of fluoride enter the body, acute toxicity can occur and various conditions can occur, such as anorexia, nausea, abdominal pain, gastric ulcers, cramped bleeding and even death. Therefore, the fluorine-free organosilicon hydrophobic material is the first choice for preparing the self-cleaning coating for the vehicle paint.

Besides the hydrophobic self-cleaning function, the surface of the vehicle paint also needs to be smooth and bright to a great extent. The smoother the paint surface, the harder the dust or other dirty dirt is adhered to, and the self-cleaning of the dust can be realized under the action of wind power, so that the vehicle body keeps bright and beautiful appearance for a long time, and the high-cost and high-frequency manual cleaning operation is avoided.

Disclosure of Invention

The invention aims to provide a low-surface-energy fluorine-free organic silicon self-cleaning slip-increasing liquid which is used for protecting and modifying the surface of automobile/locomotive paint, can play a role in self-cleaning slip increasing, has high weather resistance and heat resistance, is energy-saving and environment-friendly, and is non-toxic and nuisanceless.

Another object of the present invention is to provide a method for preparing a self-cleaning slip agent.

It is another object of the present invention to provide a fluorine-free silicone self-cleaning slip-enhancing coating.

It is another object of the present invention to provide a method for preparing a self-cleaning slip-enhancing coating.

In order to achieve one of the purposes, the invention adopts the following technical scheme;

a fluorine-free organic silicon self-cleaning slip additive for vehicle paint comprises the following raw materials in parts by weight: 5-30 parts of organic silicon monomer, 5-20 parts of organic titanium compound, 1-10 parts of adhesion promoter, 1-10 parts of organic acid and 20-70 parts of solvent.

Further, the organosilicon monomer is selected from at least one of dimethyl dimethoxy silane, dimethyl diethoxy silane, hexamethyl disiloxane, octamethyl cyclotetrasiloxane, methyl ethyl diethoxy silane, triethyl ethoxy silane, diethyl diethoxy silane, tripropyl ethoxy silane, dipropyl diethoxy silane, triisopropyl methoxy silane, methyl propyl diethoxy silane, triisobutyl ethoxy silane, methyl silicone oil, hydrogen-containing silicone oil and amino silicone oil.

Further, the organic titanium compound is at least one selected from the group consisting of butyl titanate, isopropyl titanate, titanium tetrachloride, bis (dioctyloxypyrophosphate) ethylene titanate, isopropyltris (dioctylphosphonoyl) titanate, isopropyldioleacyloxy (dioctylphosphonoyl) titanate, bis (acetylacetonate) diisopropyl titanate, isopropyltrioleate acyloxy titanate, (acetoacetato) diisobutyloxy titanate.

Further, the adhesion promoter is selected from gamma-aminopropyltriethoxysilane and/or N- (beta-aminoethyl) -gamma-aminopropyltrimethoxysilane.

Further, the organic acid is at least one selected from formic acid, glacial acetic acid, propionic acid and butyric acid.

Further, the solvent is at least one selected from ethanol, isopropanol, ethylene glycol butyl ether, propylene glycol butyl ether, ethyl acetate, propyl acetate, butyl acetate, n-hexane, white spirit, petroleum ether, methylal and dichloromethane.

The preparation method of the self-cleaning slip fluid comprises the following steps: adding an organic silicon monomer, an organic titanium compound, an adhesion promoter, an organic acid and a solvent into a reflux reaction kettle in batches or simultaneously for mixing, gradually heating to 20-70 ℃ under stirring, and then stirring for reflux reaction for 0.5-2 hours to obtain the organic silicon/titanium/organic.

The fluoride-free organosilicon self-cleaning slip-increasing coating is prepared by coating the self-cleaning slip-increasing liquid on a base material.

Further, the thickness of the self-cleaning slip-increasing coating is 1-100 mu m.

A preparation method of a fluorine-free organic silicon self-cleaning slip-increasing coating comprises the following steps: coating the surface of the base material with the organic silicon self-cleaning slip-increasing liquid, and naturally curing at normal temperature to obtain the organic silicon self-cleaning slip-increasing coating.

Further, the base material is automobile paint, high-speed rail automobile paint, subway automobile paint, glass, ceramic, marble, stainless steel or wood board.

Further, the coating mode is spraying and/or wiping. When the organic silicon hydrophobic self-cleaning slip agent is coated, the coating is required to be uniform, and the final product can not have the problems of appearance such as orange peel lines, wavy lines, rainbow lines, spots and the like.

The mechanism of the slip-increasing action of the invention is as follows: the organic titanium compound has the characteristics of strong permeability and easy hydrolysis, easily permeates into the vehicle paint surface in a solution state in the smearing process and forms a compact film layer from inside to outside, and the film layer reacts with water vapor in the air to form nano-scale TiO in the curing process₂Inorganic particles finally and densely fill up the fine concave structure on the surface of the car paint to form a protective film layer with flat height and no specific surface.

The invention has the following beneficial effects:

1. hydrophobic self-cleaning effect: the film layer has a strong hydrophobic function, the water flow is in the form of water slipping and water repellency, and external dirt is difficult to adhere to the surface of the automobile paint through the water flow, so that the automobile paint is protected. When raining, a small amount of dust or dirt can be washed clean by rainwater without leaving marks. Moreover, the fluorine-free organic silicon serving as a hydrophobic self-cleaning structural unit has high weather resistance, high temperature resistance, high corrosion resistance of a melting agent, ultraviolet irradiation resistance, energy conservation, environmental protection, no toxicity and no public nuisance, and is the first choice as a hydrophobic self-cleaning coating material for the vehicle paint.

2. The effects of increasing smoothness and brightening: the organic titanium compound has extremely strong penetrability and is extremely easy to hydrolyze, and the organic titanium compound permeates into the vehicle paint surface in the smearing process and forms compact nano inorganic TiO from inside to outside₂And (5) protecting the film. The chemical reaction formula for converting organic titanium into inorganic titanium dioxide is as follows:

nanoscale inorganic TiO₂The film layer has strong ultraviolet resistance, can effectively resist ultraviolet irradiation and prevent the paint surface of the vehicle from aging. Inorganic TiO compound₂The photocatalyst material is a well-known photocatalyst material, can prevent bacteria and small molecular organic dirt from surviving under the irradiation of sunlight, the dirt is adhered to the photocatalyst material through a coating, the cleaning is easy, and the paint surface is not damaged. TiO 2₂The film layer can also effectively reduce the permeability of acidic substances, and successfully protect the vehicle paint from being corroded and damaged by acid rain and other acidic substances (such as bird droppings, dead insects and the like). And, TiO in inorganic state₂The nano film layer also has higher hardness and wear resistance, and can prevent the generation of slight scratches on the surface of the vehicle paint. TiO compared with the hardness of 2H of common vehicle paint₂The nanometer inorganic film layer can prevent some slight scratches in daily life. Thus, nano TiO₂The formation of the inorganic film layer can enhance the ultraviolet resistance, wear resistance, compactness, smoothness and other capabilities of the surface of the automobile paint, does not crack or fall off, can protect the automobile paint from oxidation and brightness as new for a long time, is lubricated as jade, also protects the paint surface from being invaded by external dirt, and keeps the smoothness and the brightness of the surface of the automobile paint for a long time.

3. The organic silicon self-cleaning slip-increasing coating has wide application value in the fields of self-cleaning of glass doors and windows, pollution resistance and water resistance of marble ceramics, pollution resistance and gloss enhancement of wood furniture and the like besides the body beauty of automobiles, high-speed rails and subways.

Detailed Description

The present invention will be further described with reference to the following specific examples.

Example 1

The organosilicon self-cleaning slip agent comprises the following raw materials: 20 parts of triethylethoxysilane, 5 parts of butyl titanate, 2 parts of KH550 (gamma-aminopropyltriethoxysilane), 5 parts of glacial acetic acid and 48 parts of isopropanol.

The organic silicon self-cleaning slip agent is prepared by the following method:

weighing the components in parts by weight, adding the components into a reflux reaction kettle, gradually heating to 55 ℃ while stirring, keeping the reaction temperature at 55 ℃, stirring for reaction for 1h, stopping heating, and cooling to room temperature to obtain the organic silicon self-cleaning slip liquid.

The construction method of the organic silicon self-cleaning slip-increasing coating is carried out according to the following steps:

the prepared organic silicon self-cleaning slip-increasing liquid is uniformly coated on the surface of a clean and dry vehicle paint matrix through spraying equipment, and then the organic silicon self-cleaning slip-increasing liquid is uniformly wiped by clean dust-free cloth. In order to make the thickness of the self-cleaning slip-increasing coating sufficient and ensure that the self-cleaning slip-increasing effect of the coating is significant, it is preferable to repeat the above two-step process 3 times. After all the steps are completed, curing is carried out for 20-30 min at normal temperature, a remarkable hydrophobic effect can be achieved, and the surface of the vehicle paint becomes smooth and bright.

Example 2

The organosilicon self-cleaning slip agent comprises the following raw materials: 10 parts of methyl silicone oil, 5 parts of isopropyl titanate, 2 parts of KH792(N- (beta-aminoethyl) -gamma-aminopropyltrimethoxysilane), 6 parts of glacial acetic acid, 15 parts of methylal, 20 parts of dichloromethane and 32 parts of white gasoline.

weighing the components in parts by weight, adding the components into a reflux reaction kettle, stirring and reacting for 2 hours at normal temperature, and stopping stirring to obtain the organic silicon self-cleaning slip liquid.

The prepared organic silicon self-cleaning slip-increasing liquid is absorbed by the dust-free cloth to quickly, simply and repeatedly wipe the surface of the vehicle body (including vehicle paint and glass) to ensure that each part of the vehicle body is coated, and then the liquid is uniformly wiped by the dry dust-free cloth until the coating is smooth and bright. The above steps were repeated 3 times. After all the steps are completed, waiting for 20-30 min, and enabling the vehicle body to become smooth, bright and strong and hydrophobic.

Example 3

The organosilicon self-cleaning slip agent comprises the following raw materials: 10 parts of methyl silicone oil, 1 part of KH792, 4 parts of isopropyl titanate, 5 parts of glacial acetic acid, 15 parts of methylal, 20 parts of dichloromethane and 35 parts of white gasoline.

weighing the components in parts by weight, adding the components into a reflux reaction kettle, and stirring and reacting for 2 hours at normal temperature to obtain the organic silicon self-cleaning slip liquid.

The prepared organic silicon self-cleaning slip-increasing liquid is absorbed by the dust-free cloth to quickly, simply and repeatedly wipe the surface of the vehicle body (including vehicle paint and glass) to ensure that each part of the vehicle body is coated, and then the liquid is uniformly wiped by the dry dust-free cloth until the coating is smooth and bright. The above steps were repeated 3 times. After all the steps are completed, waiting for 20-30 min, and enabling the vehicle body to become very smooth and bright and to be strongly hydrophobic.

Example 4

The organosilicon self-cleaning slip agent comprises the following raw materials: 10 parts of methyl silicone oil, 4 parts of isopropyl tri (dioctyl phosphoryloxy) titanate, 2 parts of KH792, 6 parts of glacial acetic acid, 15 parts of methylal, 20 parts of dichloromethane and 33 parts of white gasoline.

Example 5

The organosilicon self-cleaning slip agent comprises the following raw materials: 10 parts of hydrogen-containing silicone oil, 3 parts of isopropyl titanate, 2 parts of KH792, 5 parts of glacial acetic acid, 15 parts of methylal, 20 parts of dichloromethane and 37 parts of white gasoline.

Example 6

The organosilicon self-cleaning slip agent comprises the following raw materials: 10 parts of dimethyldimethoxysilane, 10 parts of octamethylcyclotetrasiloxane, 10 parts of tripropylethoxysilane, 5 parts of bis (dioctyloxypyrophosphate) ethylene titanate, 15 parts of (acetoacetoxyethyl) diisobutyloxy titanate, 4 parts of KH550, 4 parts of KH792, 1 part of propionic acid, 20 parts of propylene glycol butyl ether and 20 parts of petroleum ether.

weighing the components in parts by weight, adding the components into a reflux reaction kettle in batches, and stirring and reacting for 1 hour at the temperature of 20 ℃ to obtain the organic silicon self-cleaning slip liquid.

And spraying the organic silicon self-cleaning slip-increasing liquid on the surface of the high-speed rail car paint, and naturally curing at normal temperature to obtain the organic silicon self-cleaning slip-increasing coating, wherein the thickness of the coating is 12 microns.

Example 7

The organosilicon self-cleaning slip agent comprises the following raw materials: 5 parts of dimethyldiethoxysilane, 5 parts of amino silicone oil, 5 parts of isopropyl dioleate acyloxy (dioctylphosphonoxy) titanate, 10 parts of KH550, 5 parts of formic acid, 5 parts of butyric acid, 5 parts of n-hexane and 15 parts of methylal.

weighing the components in parts by weight, adding the components into a reflux reaction kettle in batches, and stirring and reacting at 70 ℃ for 0.5h to obtain the organic silicon self-cleaning slip liquid.

The organic silicon self-cleaning slip-increasing liquid is wiped on the surface of the ceramic and naturally cured at normal temperature to obtain the organic silicon self-cleaning slip-increasing coating, and the thickness of the coating is 70 mu m.

Example 8

The organosilicon self-cleaning slip agent comprises the following raw materials: 5 parts of methyl propyl diethoxysilane, 8 parts of titanium tetrachloride, 1 part of KH792, 3 parts of propionic acid, 30 parts of ethanol, 10 parts of butyl cellosolve, 20 parts of ethyl acetate and 10 parts of methylal.

weighing the components in parts by weight, simultaneously adding the components into a reflux reaction kettle, and stirring and reacting at 40 ℃ for 1.5 hours to obtain the organic silicon self-cleaning slip liquid.

And spraying the organic silicon self-cleaning slip-increasing liquid on the surface of the marble, and naturally curing at normal temperature to obtain the organic silicon self-cleaning slip-increasing coating, wherein the thickness of the coating is 48 mu m.

Example 9

The organosilicon self-cleaning slip agent comprises the following raw materials: 10 parts of hexamethyldisiloxane, 10 parts of methylethyldiethoxysilane, 5 parts of bis (acetylacetonato) diisopropyl titanate, 10 parts of isopropyltrioleoxy titanate, 6 parts of KH550, 4 parts of formic acid, 25 parts of propyl acetate and 25 parts of butyl acetate.

weighing the components in parts by weight, simultaneously adding the components into a reflux reaction kettle, and stirring and reacting at 50 ℃ for 1.5 hours to obtain the organic silicon self-cleaning slip liquid.

And (3) wiping the organic silicon self-cleaning and slip-increasing liquid on the surface of the wood board, and naturally curing at normal temperature to obtain the organic silicon self-cleaning and slip-increasing coating, wherein the thickness of the coating is 25 micrometers.

Comparative example

The titanium-free organic silicon hydrophobic liquid comprises the following raw materials: 10 parts of methyl silicone oil, 1 part of KH792, 5 parts of glacial acetic acid, 15 parts of methylal, 20 parts of dichloromethane and 49 parts of white electric oil.

The titanium-free organic silicon hydrophobic liquid is prepared by the following method:

weighing the components in parts by weight, adding the components into a reflux reaction kettle, and stirring and reacting for 2 hours at normal temperature to obtain the titanium-free organosilicon hydrophobic liquid.

The prepared titanium-free organic silicon hydrophobic liquid absorbs the hydrophobic liquid through the dust-free cloth, quickly, simply and repeatedly wipes the surface of the vehicle body (including vehicle paint and glass) to ensure that each part of the vehicle body is coated, then the dry dust-free cloth is used for wiping the redundant liquid uniformly, and the steps are repeated for 3 times. And (4) after all the steps are completed, waiting for 20-30 min, and enabling the vehicle body to be matt, not smooth and strongly hydrophobic.

Performance testing

The organosilicon self-cleaning slip-increasing liquid prepared in the examples 1-5 and the comparative example is smeared on a stainless steel vehicle paint sample (5cm by 5cm) and is placed at normal temperature for 3 days to perform a hydrophobic performance (water drop contact angle) test, a surface roughness test and a service life test.

Wherein the contact angle of a water drop is tested by a contact angle measuring instrument SDC-200, and the surface roughness is tested by a surface roughness tester Surfcom480B (the longitudinal range is 10-80 mm).

The life test is conducted by placing the sample in a high accelerated weathering test chamber (HAST, PC-422R8, Hirayama) to characterize the sample's heat and humidity stability. The test conditions set a temperature of 121 ℃, a humidity of 97%, an air pressure of 0.1Mp, and test times of 3, 6, and 12 hours, corresponding to 1.25 years, 2.5 years, and 5 years of life, respectively. The service life is calculated by a high accelerated aging test and the following formula:

AF＝exp{(Ea/k)×[(1/Tu)-(1/Ts)]+(RHsⁿ-RHuⁿ)}

in the formula:

the value of the activation energy Ea (Ea ═ 0.8eV), the recommended value in GR-1221; wherein k is Boltzmann constant, and k is 8.6 × 10^-5(ii) a Tu is the normal temperature, and the value of Tu is 85 (absolute temperature); ts is the temperature in the acceleration state, and the value of Ts is 110 (absolute temperature); RHuⁿIs the n power of normal relative humidity (n is 2 generally), and the value is 0.85; RHsⁿThe value is the n power (n is 2 generally) of the relative humidity in the acceleration state, and is 0.85. The premise of this conversion is that the failure mechanism of the product is the same in both aging modes; and the basic assumption is that the product behaves in accordance with normal temperature behavior under high stress conditions.

The length of the service life of the coating is measured by the contact angle of the water drop after the HAST test of the sample wafer high accelerated aging test: when the contact angle of the sample wafer is more than or equal to 90 degrees after the test, the hydrophobic self-cleaning performance of the sample wafer is kept good, and the service life is qualified and reaches the standard; when the contact angle of the sample wafer is less than 90 degrees after the test, the hydrophobic self-cleaning performance of the sample wafer is invalid, and the service life is unqualified.

The test results are shown in the following table:

as can be seen from the table above, the service lives of the coatings obtained in examples 1-5 are all more than 2.5 years, wherein the hydrophobic effect and the service life of example 2 are optimal, the contact angle of an initial water drop reaches 108 degrees, and the contact angle after a 5-year service life test is 92 degrees; the coating roughness of example 2 was 0.212 after 5 years life test, showing excellent smoothness. It can be seen that the coating obtained in example 2 retains the longest durable self-cleaning slip effect. This is because the methyl group on the molecular chain structure of the methyl silicone oil is a very good hydrophobic group, and besides the excellent hydrophobic effect, the long-chain Si-O-Si molecular structure also improves the lubricating effect of the coating to a certain extent, so that the coating of example 2 has a very good hydrophobic effect and a slip effect.

The smooth and brightening effect of the coating is more benefited by nanometer inorganic TiO which has liquid organic titanium compound to permeate into the vehicle paint surface and form a compact coating from inside to outside₂And (5) protecting the film. Nanoscale inorganic TiO₂The film layer has strong ultraviolet resistance, can effectively resist ultraviolet irradiation and prevent the paint surface of the vehicle from aging. At the same time, inorganic TiO₂The film layer can also enhance the wear resistance, corrosion resistance and other capabilities of the surface of the automobile paint, does not crack or fall off, and can protect the automobile paint from oxidation for a long time and be smooth and bright for a long time. The rough surface is easy to cause corrosive liquid or dust to permeate into the metal inner layer through the microscopic valleys of the surface, so that the surface is corroded. Conversely, the smoother the surface, the less likely the dust to remain, and the more advantageous it is to resist corrosion.

To confirm the slip effect of the organotitanium, a hydrophobic organosilicon liquid free of organotitanium was also prepared, as shown in the comparative examples in the table above: with the increase of the high accelerated aging time, the surface roughness of the coating is increased sharply, and the contact angle and the roughness are basically close to those of an uncoated sample wafer after a 5-year life test. This demonstrates that the organotitanium not only retains the long-term slip effect, but also maintains the long-term hydrophobic effect of the coating.

Comparing examples 1 and 2, it was found that methyl silicone oil is more suitable than monomeric small molecule silanes as a self-cleaning, slip-enhancing and brightness-enhancing coating for automotive paints, possessing a longer service life, a better hydrophobic effect and a smoother surface.

Comparing examples 2 and 4, it was found that isopropyl titanate had better slip and life than isopropyl tris (dioctylphosphonoyl) titanate as slip agent, probably because the former was more hydrolyzed than the latter, and the former had a smaller molecular structure, which was more favorable for penetration into the deep structure of the finish.

Therefore, the organic silicon self-cleaning slip-increasing coating has the service life of more than 2.5 years and can completely meet the actual requirement of vehicle body beauty.

In general, compared with other organic vehicle maintenance products which mainly comprise petroleum wax, silicone oil and fluorine, the organic silicon self-cleaning slip agent is prepared by adopting fluorine-free organic silicon and easily hydrolyzed organic titanium compounds to react at low temperature. The organosilicon self-cleaning slip liquid is used for protecting and decorating the paint surface of the vehicle body, the fine concave structure of the paint surface of the vehicle can be filled from inside to outside to form a highly flat, smooth and incomparable protective film, and the surface of the vehicle body is endowed with smooth and bright, mirror effect, lasting brightness, dust resistance, dust prevention, strong water splashing resistance and self-cleaning protection.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The fluoride-free organosilicon self-cleaning slip additive for the vehicle paint is characterized by comprising the following raw materials in parts by weight: 5-30 parts of organic silicon monomer, 5-20 parts of organic titanium compound, 1-10 parts of adhesion promoter, 1-10 parts of organic acid and 20-70 parts of solvent.

2. The self-cleaning slip solution of claim 1, wherein the silicone monomer is selected from at least one of dimethyldimethoxysilane, dimethyldiethoxysilane, hexamethyldisiloxane, octamethylcyclotetrasiloxane, methylethyldiethoxysilane, triethylethoxysilane, diethyldiethoxysilane, tripropylethoxysilane, dipropyldiethoxysilane, triisopropylmethoxysilane, methylpropyldiethoxysilane, triisobutylethoxysilane, methylsilicone oil, hydrosilicone oil, and aminosilicone oil.

3. The self-cleaning slip solution of claim 1, wherein the organic titanium compound is selected from at least one of butyl titanate, isopropyl titanate, titanium tetrachloride, bis (dioctyloxypyrophosphate) ethylene titanate, isopropyltris (dioctylphosphonoxy) titanate, isopropyldioleacyloxy (dioctylphosphonoxy) titanate, bis (acetylacetonate) diisopropyl titanate, isopropyltrioleate acyloxy titanate, (ethylacetoacetate) diisobutyloxy titanate.

4. A self-cleaning slip agent according to claim 1, wherein the adhesion promoter is selected from gamma-aminopropyltriethoxysilane and/or N- (beta-aminoethyl) -gamma-aminopropyltrimethoxysilane.

5. The self-cleaning slip solution of claim 1, wherein the organic acid is selected from at least one of formic acid, glacial acetic acid, propionic acid, and butyric acid.

6. The self-cleaning slip solution of claim 1, wherein the solvent is selected from at least one of ethanol, isopropanol, ethylene glycol butyl ether, propylene glycol butyl ether, ethyl acetate, propyl acetate, butyl acetate, n-hexane, white spirit, petroleum ether, methylal, methylene chloride.

7. A preparation method of the self-cleaning slip agent as claimed in any one of claims 1 to 6, characterized by comprising the following steps: adding an organic silicon monomer, an organic titanium compound, an adhesion promoter, an organic acid and a solvent into a reflux reaction kettle in batches or simultaneously for mixing, gradually heating to 20-70 ℃ under stirring, and then stirring for reflux reaction for 0.5-2 hours to obtain the organic silicon/titanium/organic.

8. A fluorine-free organosilicon self-cleaning slip-increasing coating is characterized by being prepared by coating the self-cleaning slip-increasing liquid of any one of claims 1 to 6 on a substrate; the thickness of the self-cleaning slip-increasing coating is 1-100 mu m.

9. A preparation method of a fluorine-free organic silicon self-cleaning slip-increasing coating is characterized by comprising the following steps: coating the surface of the base material with the organic silicon self-cleaning slip-increasing liquid, and naturally curing at normal temperature to obtain the organic silicon self-cleaning slip-increasing coating.

10. The method of claim 9, wherein the substrate is an automotive paint, a high-speed rail paint, a subway paint, glass, ceramic, marble, stainless steel, or wood board; the coating mode is spraying and/or wiping.