CN112760032A - Anti-sticking and anti-doodling coating as well as preparation method and application thereof - Google Patents

Abstract

The invention discloses an anti-sticking and anti-doodling coating, which comprises a component A and a component B, and is characterized in that the addition ratio of the component A to the component B is 3: 1-10: 1; the component A is an end-capped organic siloxane polymer containing an epoxy group and polymerized by four silanes as shown in formulas 1-4, and the weight-average molecular weight of the organic siloxane polymer is 1000-8000; the component B is diamine polymer of an organic silicon chain segment shown as a formula 5. The invention also discloses a preparation method and application thereof. The anti-sticking and anti-graffiti coating can be coated on various substrates such as metal, cement, wood, plastic, glass and the like, and has the advantages of quick hardness establishment, and excellent anti-sticking and anti-graffiti effects. The double components of the invention do not contain any organic solvent, are 100 percent modified organosilicon, and are environment-friendly and excellent. The organosilicon polymer component with epoxy group used in the invention can effectively provide adhesion to various base materials.

Description

Anti-sticking and anti-doodling coating as well as preparation method and application thereof

Technical Field

The invention relates to the field of organic silicon coatings, and particularly relates to an anti-sticking and anti-doodling coating as well as a preparation method and application thereof.

Background

It is known that street advertisements are a serious disease of deep pain of governments and citizens, and especially people flow numerous public places or tourist attractions, which not only seriously affects the image of a city, but also brings great trouble to advertisement management. And clear up these advertisements and scribble and need consume great manpower and material resources, because the adhesion of the super glue at these little advertisement backs is all stronger, only use water to wash and all can't carry out effectual cleaing away in the clearance process, often need chemical cleaning agent to clear up, chemical cleaning agent not only has certain corrosivity, still smell pungent, causes the injury of skin and respiratory tract to the cleaner easily, and these chemical cleaning agents still can cause the pollution to the environment. Except for street graffiti and advertisements, various pollution phenomena can be encountered in kitchens, cement-based elevated roads, indoor wall surfaces and the like, which cause difficulty in cleaning and clearing.

The application of a top anti-graffiti coating to such locations where graffiti is likely to occur is an effective and convenient method to prevent or reduce the adhesion of various small advertisements and contaminants to such substrates, and to avoid and facilitate cleaning and rinsing. A wide variety of anti-graffiti coatings are therefore available on the market for this purpose, including various technical solutions, such as the classes of oily polyurethanes, aqueous two-component polyurethanes, fluorocarbon and silicone RTV silicone rubbers. Patent CN101275056 discloses an anti-sticking and anti-doodling coating composition, which comprises, by weight, 20-70% of fluoropolymer resin, 1-7% of fluorine-containing surfactant, 2-7% of silicon-containing surfactant, 1-5% of nano powder, 0.1-2% of metal drier and 20-80% of solvent. Although the fluoropolymer resin with relatively low surface tension used in the anti-sticking coating composition can effectively prevent the adhesive bonding of the adlets, the fluoropolymer is difficult to effectively adhere to the substrate for a long time, and the durability of the coating on the substrate is influenced, so that the durability of the anti-graffiti is influenced. In addition, this proposal also uses a large amount of solvent to dissolve the fluoropolymer, and although there is no disclosure of any solvent, depending on the solubility of the fluoropolymer, a relatively strong fluorine-containing solvent or benzene-based or ketone-based solvent is required to achieve a relatively good dissolution effect, which causes a relatively large pungent odor and environmental pollution. Patent CN105219247 discloses an anti-graffiti two-component transparent varnish and a preparation method thereof, wherein the anti-graffiti two-component transparent varnish comprises a hydroxy acrylic emulsion containing water-based wax of a component a and a water-dispersed isocyanate curing agent of a component B, and the wiping effect of stains can be improved through the water-based wax. The adhesion force with a base material and the paint film strength can be effectively provided through the hydroxyl acrylic acid and the isocyanate curing agent, but the effect of preventing the adlets from being pasted cannot be achieved through a water-based wax mode; although this solution may have some effect on wiping some water-based pen graffiti, it is not possible to wipe with an oil-based pen.

Patent CN105542658 discloses an antifouling and doodling-proof organic silazane coating, its preparation method and application, the organic silazane prepolymer of this patent is prepared by reacting diisocyanate monomer with organic silazane under the condition of catalyst to generate prepolymer, then dissolving into solvent such as: ethyl acetate, butyl acetate, toluene, cyclohexane, xylene, dioxane and tetrahydrofuran. The prepared antifouling and doodling-preventing organic silazane coating uses a large amount of solvents of dangerous goods, the prepared products are also dangerous goods, a dangerous goods transport vehicle and a dangerous goods warehouse are used in the transportation and storage processes, and the wide application is difficult to realize in the use process. Patent CN109054571 discloses a preparation of fluorine-containing organosilicon modified anti-doodling paint, which comprises adding amination agent into fluorine-silicon modified epoxy acrylic cationic resin to form low surface energy cationic resin, and matching color paste to form anti-doodling electrophoretic paint. The proposal can improve the oleophobic effect of the surface of the kitchen appliance after coating, but the operation is carried out in an electrophoresis mode, which is difficult to meet the common application and construction.

According to the actual requirements of the anti-doodling coating, several important aspects need to be achieved: firstly, the construction is convenient, and the construction can be carried out in a more convenient way, such as various brushing and spraying, and the construction can be carried out more easily in an open environment; secondly, the coating is environment-friendly, and because many construction environments are public places, old people or children may exist in the places during construction, the used anti-doodling coating is required to be environment-friendly and cannot contain harmful organic solvents; thirdly, the adhesive force and the tolerance are excellent, the painting environment and the base material can have diversity, the surface can be frequently brushed, and the requirement is that the adhesive force with various base materials is excellent, and the effects of better hardness, abrasion resistance and washing resistance can be achieved; fourth, the anti-graffiti effect is excellent, which requires not only a relatively good anti-sticking effect to some small advertisements containing super glue, but also a relatively good wiping and washing effect to pens of various colors that may produce graffiti.

Based on the above main requirements of performance and application, and on an analysis of the prior art, the present invention aims to provide an environmentally friendly, high performance graffiti resistant coating composition. The organic silicon or the organic fluorine has surface energy with lower price, is not easy to be pasted by the adhesive, and can resist water and graffiti of an oil pen, but the two materials have poor adhesive force to different base materials, are difficult to be adhered firmly and are easy to fall off; the other defect is that the two materials are soft, have poor wear resistance and scratch resistance and are easy to break. The curing method using a hydroxy acrylate and an isocyanate, or the curing method using an epoxy and a curing agent, provides excellent adhesion and film forming effect, hardness and durability, but the anti-graffiti effect is not required. At present, a certain anti-graffiti effect is achieved by means of organic silicon resin dissolved by a solvent, and the product is not environment-friendly and pollutes the environment. There is a great need and need for graffiti-resistant coatings that are environmentally friendly, have excellent graffiti resistance, and have excellent workability and durability.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide an anti-sticking and anti-graffiti coating, and a preparation method and application thereof.

The anti-sticking and anti-doodling coating disclosed by the invention adopts a bi-component curing mode, and a formed cured paint film can be coated on various base materials such as metal, cement, wood, plastic, glass and the like, has the advantages of quick hardness establishment, excellent anti-sticking and anti-doodling effects, and can be used for preventing the sticking of adlets on building exterior walls and in municipal administration, preventing fouling of kitchens and resisting fingerprints of electronic display products.

An anti-sticking and anti-doodling coating comprises a component A and a component B, wherein the adding proportion of the component A to the component B is 3: 1-10: 1;

the component A is an end-capped organic siloxane polymer containing an epoxy group and polymerized by four silanes as shown in formulas 1-4, and the weight-average molecular weight of the organic siloxane polymer is 1000-8000;

the component B is diamine polymer of organosilicon chain segments shown in a formula 5:

m in said formula 5 is 5-20; n is 1-8.

A preparation method of an anti-sticking and anti-doodling coating comprises the following steps:

preparation of epoxy organosiloxane polymer component a:

mixing 1-5% of trimethyl methoxy silane shown as a formula 1, 25-45% of dimethyl dimethoxy silane shown as a formula 2, 5-10% of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane shown as a formula 3 and 40-60% of gamma- (2, 3-epoxypropoxy) propyl methyl dimethoxy silane shown as a formula 4, adding 0.5-1.5% of catalyst, heating to 85-110 ℃ for reaction, collecting reactants, distilling out all methanol, cooling and filtering to obtain an epoxy organic siloxane polymer component A;

preparation of diamine polymer component B of the silicone segment:

under the protection of nitrogen, terminal hydrogen-containing polysiloxane with the hydrogen content of 0.01-0.5 percent and allyl polyoxypropylene ether with the same mole number as the hydrogen content are heated to 100-120 ℃ under the condition of a platinum catalyst to react to generate a polyether modified polydimethylsiloxane polymer;

then under the condition of a solid phase catalyst, adding mixed gas of ammonia and hydrogen, carrying out ammoniation reaction at the temperature of 160-180 ℃, and controlling the pressure to be 5-10Mpa to generate a terminal secondary amine curing agent polymer B;

mixing the prepared epoxy organic siloxane polymer component A and the diamine polymer component B of the organic silicon chain segment according to the mass ratio of 3: 1-10: 1 to obtain the anti-sticking anti-graffiti coating.

In a preferred embodiment of the invention, the catalyst is a basic ion exchange resin. The basic ion exchange resin comprises any one or more of D301 large pore size weak basic ion exchange resin, D201 strong basic ion exchange resin, AMBERLITE HPR9700 weak basic ion exchange resin or D941 large pore weak basic ion exchange resin. The preferred amount is 0.5-1%.

In a preferred embodiment of the present invention, the epoxyorganosiloxane polymer, component A, has a weight average molecular weight of 1000-.

In a preferred embodiment of the present invention, the allyl polyoxypropylene ether is a polyoxypropylene ether having a single terminal allyl group as shown in formula 6;

x in the formula 6 is 1-8;

in a preferred embodiment of the present invention, the platinum catalyst is a Karster catalyst, and the platinum metal content in the platinum catalyst is 4000ppm, and the amount of the platinum metal is 10-20% of the hydrogen content of the terminal hydrogen-containing polysiloxane.

In a preferred embodiment of the invention, the ratio of component a to component B of the anti-adhesive graffiti-resistant coating is 3: 1-5: 1.

in a preferred embodiment of the invention, the anti-sticking and anti-graffiti coating is prepared by the following steps:

the component A is prepared by 3 percent of trimethyl methoxy silane, 40 percent of dimethyl dimethoxy silane, 10 percent of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, 47 percent of gamma- (2, 3-epoxypropoxy) propyl methyl dimethoxy silane and 0.5 percent of D301 large-aperture weak-base ion exchange resin catalyst which are added and react at the temperature of 90-100 ℃;

component B is prepared by reacting 0.1% hydrogen-terminated polydimethylsiloxane (formula 4, X is 3) with 0.05% Karster catalyst at 110 ℃; then ammonia gas and hydrogen gas are introduced, and the ammonia is prepared at 165 ℃ and under the pressure of 7.5 Mpa;

according to the mass ratio of the component A to the component B being 3.5: 1 to prepare the anti-sticking anti-graffiti coating.

The application of the anti-sticking and anti-graffiti coating is used for brushing walls in building exterior walls, kitchen and bathroom decoration or municipal construction.

In a preferred embodiment of the present invention, the application is specifically:

the component A and the component B are uniformly mixed according to a certain proportion, then the mixture is constructed on a base material to be coated in a rolling coating, brush coating or spraying manner, and the mixture can be solidified into a hard paint film with low surface tension and anti-graffiti effect after 6 hours at the temperature of 10-35 ℃, and the effect is better after 24 hours of solidification. The cured paint film can resist the adhesion of small advertisements, and can be easily erased after the oily mark pen is scrawled.

The invention has the beneficial effects that:

the anti-sticking and anti-graffiti coating can be coated on various substrates such as metal, cement, wood, plastic, glass and the like, and has the advantages of quick hardness establishment, and excellent anti-sticking and anti-graffiti effects.

The double components of the invention do not contain any organic solvent, are 100 percent modified organosilicon, and are environment-friendly and excellent. The organosilicon polymer component with epoxy group used in the invention can effectively provide adhesion to various base materials.

Detailed Description

The technical principle of the invention is that by using the organic silicon polymer containing epoxy groups, the problem of poor adhesion of organic silicon to a base material is effectively solved, and the organic silicon polymer can perform effective crosslinking reaction with amino-containing modified polysiloxane, so that the hardness and the anti-graffiti effect of a paint film are improved.

The organic siloxane polymer adopted by the invention avoids the problems of easy volatilization of micromolecular silane and uneven curing, and in the preparation and use processes, the inventor finds that the organic siloxane of an epoxy group prepared under the condition of trimethyl methoxy silane with an end capping effect provides longer weather resistance and anti-cracking performance, and the formed coating has better anti-sticking and anti-graffiti effects.

In addition, an amino-terminated curing agent of polysiloxane is used, so that the formed amino and epoxy addition curing has better hardness and anti-friction effect. The organosiloxane segment of the amino curative component is effective to provide excellent compatibility with component a, providing a clear, uniform cured film, while the siloxane segment of the curative component is also effective to provide anti-stick anti-graffiti effects.

The invention is further illustrated by the following examples and comparative examples:

example 1

In a1 l reaction flask, 24 g of trimethylmethoxysilane, 240 g of dimethyldimethoxysilane, 60 g of gamma- (2, 3-glycidoxy) propyltrimethoxysilane and 276 g of gamma- (2, 3-glycidoxy) propylmethyldimethoxysilane were added to the reaction flask, 3 g of D301 ion exchange resin was then added, the temperature was slowly raised to 90 ℃ over 1 hour, the reaction was started with the evaporation of methanol, and the distilled methanol was collected. When no more methanol is distilled out, the temperature is raised to 105 ℃, methanol is distilled out, fractions are collected until no more fractions are distilled out, and D301 ion exchange resin is filtered out by lowering the temperature to obtain a pale yellow epoxy modified organic siloxane polymer A1.

Example 2

In a1 liter reaction flask, 6 g of trimethylmethoxysilane, 210 g of dimethyldimethoxysilane, 48 g of gamma- (2, 3-glycidoxy) propyltrimethoxysilane and 336 g of gamma- (2, 3-glycidoxy) propylmethyldimethoxysilane were charged into the reaction flask, 4.5 g of D201 ion exchange resin was then added, the temperature was slowly raised to 90 ℃ over 1 hour, reaction was started with evaporation of methanol, and the distilled methanol was collected. When no more methanol is distilled out, the temperature is raised to 105 ℃, methanol is distilled out, fractions are collected until no more fractions are distilled out, and the temperature is lowered to filter out D201 ion exchange resin, so that pale yellow epoxy modified organic siloxane polymer A2 is obtained.

Example 3

In a1 liter reaction flask, 30 g of trimethylmethoxysilane, 150 g of dimethyldimethoxysilane, 60 g of gamma- (2, 3-glycidoxy) propyltrimethoxysilane and 360 g of gamma- (2, 3-glycidoxy) propylmethyldimethoxysilane were charged into the reaction flask, 5.0 g of D301 ion exchange resin was then added, the temperature was slowly raised to 90 ℃ over 1 hour, reaction was started with evaporation of methanol, and the distilled methanol was collected. When no more methanol is distilled out, the temperature is raised to 105 ℃, methanol is distilled out, fractions are collected until no more fractions are distilled out, and D301 ion exchange resin is filtered out by lowering the temperature to obtain a pale yellow epoxy modified organic siloxane polymer A3.

Example 4

To a1 liter reaction flask, 400 g of hydrogen-terminated polydimethylsiloxane (0.05% hydrogen content) was charged under nitrogen, and then 60 g of 300 molecular weight allyl polyoxypropylene ether was added, and the mixture was heated to 90 ℃ over 1 hour while purging with nitrogen. When the temperature reaches 90 ℃, 0.02 gram of Kaster (4000ppm of platinum metal content) catalyst is added, then the temperature is raised to 110 ℃ for reaction, infrared detection is carried out until the reaction is finished, and heating and nitrogen protection are stopped. To obtain the end group modified polydimethylsiloxane intermediate.

Example 5

The procedure was followed as in example 4 except that 200 g of 0.2% hydrogen-terminated polydimethylsiloxane and 184 g of propylene glycol monoallyl ether having a molecular weight of 460 and 0.08 g of a Karster catalyst were used.

Example 6

Prepared in the same manner as in example 4 except that 250 grams of 0.5% hydrogen terminated polydimethylsiloxane and 145 grams of monoallyl propylene glycol having a molecular weight of 460 and 0.15 grams of a kate catalyst were used.

Example 7

200 grams of the polyoxypropylene ether polydimethylsiloxane intermediate prepared in example 4, 1.5 grams of raney nickel catalyst, 0.25 grams of sodium carbonate were charged to a1 liter autoclave. Then 38 g of ammonia gas and 0.75MPa of hydrogen gas are injected into the autoclave, the temperature is heated to 170 ℃, the pressure is 7.5MPa, and the reaction is carried out for 12 hours under the condition of heat preservation. Then cooling to room temperature, decompressing, filter-pressing to remove solid, and removing volatile from the filtered viscous liquid under the vacuum condition of 10kPa at 110 ℃ for 3 hours to obtain linear polysiloxane polyoxypropylene diamine C1.

Example 8

The linear polymethoxysilane terminated diamine C2 was obtained by the same procedure as in example 7, except that the polyoxypropylene ether polydimethylsiloxane intermediate prepared in example 5 was used.

Example 9

The linear polymethoxysilane terminated diamine C3 was obtained by the same procedure as that used in example 7, except that the polyoxypropylene ether polydimethylsiloxane intermediate prepared in example 6 was used.

Examples 10 to 13

Two-component release-stick anti-graffiti coatings were formulated according to the amounts used in table 1.

Comparative example 1

Component A was the same amount of silane as used in example 1, and a polymer was produced without performing a catalytic heating reaction, and the mixture was used as component A in the same proportion as component B in example 10.

Comparative example 2

As component A in example 11, component B used a polyetheramine of D-230.

Comparative example 3

The epoxy-modified polysiloxane used was prepared in the same manner as in example 1, using the reaction product of 24 g of trimethylmethoxysilane, 240 g of dimethyldimethoxysilane and 336 g of gamma- (2, 3-glycidoxy) propyltrimethoxysilane as component A and component B in the same manner as in example 10.

Comparative example 4

The epoxy-modified polysiloxane used was prepared in the same manner as in example 1, using as component A the reaction product of 24 g of trimethylmethoxysilane, 240 g of dimethyldimethoxysilane and 336 g of gamma- (2, 3-glycidoxy) propylmethyldimethoxysilane and as component B the same as in example 10.

The prepared two-component examples 10 to 13 and comparative examples 1 to 4 were mixed in the ratio of component A to component B, drawn on a glass plate, and cured at 25 ℃ for 24 hours to test the properties, the data of which are shown in Table 2.

Table 2:

the test method comprises the following steps:

1) oil resistance marker pen: using an oily black, red and blue mark pen to paint on the paint film, then drying for 4 hours, wiping with dry cloth, and grading according to different wiping conditions, wherein the grading standard is 0-5 points, the best grade is 5 points, the difference is 0 point, and the grading is marked as follows:

and 5, dividing: the three mark pen graffiti can be completely wiped off, and the paint film has no influence;

and 4, dividing: the three mark pen graffiti can be wiped off by more than 90 percent, and the paint film has no influence;

and 3, dividing: the three mark pen graffiti can be wiped off by more than 60 percent, and the paint film has no influence;

and 2, dividing: the graffiti of the three mark pens can be wiped off by more than 90 percent, and a paint film is broken;

1 minute: the scratch of the three mark pens can be less than 50 percent, and a paint film has no influence;

0 minute: the scratch of the three mark pens can be less than 20 percent, and a paint film is broken;

2) weather resistance

The test was carried out according to the method of the national Standard GB/T1767-1979, QUV-B.

The time to crack, yellowing and drop in oil resistance of the marker was recorded. The maximum time is 1400 hours. The test was not continued for more than 1400 hours.

3) Anti-stick test

Repeatedly sticking the film on a high-viscosity 3M adhesive tape for 100 times to determine whether the anti-sticking change and the influence of the paint film exist, and scoring according to 0-5, wherein the scoring standard is as follows:

and 5, dividing: no residual glue is left for 100 times, and the adhesive is not stuck;

and 4, dividing: no residual glue is left for 100 times, and the adhesive tape is not pasted for more than 50 times and less than 100 times;

and 3, dividing: the residual glue appears more than 50 times and less than 100 times;

and 2, dividing: the residual glue appears more than 30 times and less than 50 times;

1 minute: the residual glue appears more than 10 times and less than 30 times;

0 minute: the residual glue appears less than 10 times.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement and the like made within the principle of the present invention shall be included in the present invention.

Claims (10)

1. The anti-sticking and anti-doodling coating comprises a component A and a component B, and is characterized in that the adding proportion of the component A to the component B is 3: 1-10: 1;

the component A is an end-capped organic siloxane polymer containing an epoxy group and polymerized by four silanes as shown in formulas 1-4, and the weight-average molecular weight of the organic siloxane polymer is 1000-8000;

the component B is diamine polymer of organosilicon chain segments shown in a formula 5:

m in said formula 5 is 5-20; n is 1-8.

2. The preparation method of the anti-sticking and anti-graffiti coating as claimed in claim 1, which comprises the following steps:

preparation of epoxy organosiloxane polymer component a:

mixing 1-5% of trimethyl methoxy silane shown as a formula 1, 25-45% of dimethyl dimethoxy silane shown as a formula 2, 5-10% of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane shown as a formula 3 and 40-60% of gamma- (2, 3-epoxypropoxy) propyl methyl dimethoxy silane shown as a formula 4, adding 0.5-1.5% of catalyst, heating to 85-110 ℃ for reaction, collecting reactants, distilling out all methanol, cooling and filtering to obtain an epoxy organic siloxane polymer component A;

preparation of diamine polymer component B of the silicone segment:

under the protection of nitrogen, terminal hydrogen-containing polysiloxane with the hydrogen content of 0.01-0.5 percent and allyl polyoxypropylene ether with the same mole number as the hydrogen content are heated to 100-120 ℃ under the condition of a platinum catalyst to react to generate a polyether modified polydimethylsiloxane polymer;

then under the condition of a solid phase catalyst, adding mixed gas of ammonia and hydrogen, carrying out ammoniation reaction at the temperature of 160-180 ℃, and controlling the pressure to be 5-10Mpa to generate a terminal secondary amine curing agent polymer B;

mixing the prepared epoxy organic siloxane polymer component A and the diamine polymer component B of the organic silicon chain segment according to the mass ratio of 3: 1-10: 1 to obtain the anti-sticking anti-graffiti coating.

3. The method of claim 2, wherein the catalyst is a basic ion exchange resin. The basic ion exchange resin comprises any one or more of D301 large pore size weak basic ion exchange resin, D201 strong basic ion exchange resin, AMBERLITE HPR9700 weak basic ion exchange resin or D941 large pore weak basic ion exchange resin.

4. The method for preparing the anti-sticking and anti-graffiti coating as claimed in claim 2, wherein the weight average molecular weight of the epoxy organosiloxane polymer component A is 1000-5000.

5. The preparation method of the anti-sticking and anti-graffiti coating as claimed in claim 2, wherein the allyl polyoxypropylene ether is a polyoxypropylene ether with allyl at the single end as shown in formula 6;

x in the formula 6 is 1-8;

6. the method for preparing an anti-sticking and anti-doodling paint as claimed in claim 2, wherein the platinum catalyst is a Karster catalyst, and the platinum metal content in the platinum catalyst is 4000ppm, and the amount of the platinum metal is 10-20% of the hydrogen content of the terminal hydrogen-containing polysiloxane.

7. The method for preparing the anti-sticking and anti-graffiti coating as claimed in claim 2, wherein the ratio of the component A to the component B of the anti-sticking and anti-graffiti coating is 3: 1-5: 1.

8. the preparation method of the anti-sticking and anti-graffiti coating as claimed in claim 2, wherein the anti-sticking and anti-graffiti coating is prepared by the following steps:

the component A is prepared by 3 percent of trimethyl methoxy silane, 40 percent of dimethyl dimethoxy silane, 10 percent of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, 47 percent of gamma- (2, 3-epoxypropoxy) propyl methyl dimethoxy silane and 0.5 percent of D301 large-aperture weak-base ion exchange resin catalyst which are added and react at the temperature of 90-100 ℃;

component B is prepared by reacting 0.1% hydrogen-terminated polydimethylsiloxane (formula 4, X is 3) with 0.05% Karster catalyst at 110 ℃; then ammonia gas and hydrogen gas are introduced, and ammoniation is carried out at 165 ℃ and 7.5Mpa to prepare the ammonia-free water absorbent resin;

according to the mass ratio of the component A to the component B being 3.5: 1 to prepare the anti-sticking anti-graffiti coating.

9. The use of a release anti-graffiti coating according to any one of claims 1 to 8, for painting walls for building facades, kitchen and toilet finishing or for municipal construction.

10. The use of a release anti-graffiti coating according to claim 9, wherein said use is in particular:

the component A and the component B are uniformly mixed according to a certain proportion, then the mixture is constructed on a base material to be coated in a rolling coating, brush coating or spraying manner, and the mixture can be solidified into a hard paint film with low surface tension and anti-graffiti effect after 6 hours at the temperature of 10-35 ℃, and the effect is better after 24 hours of solidification. The cured paint film can resist the adhesion of small advertisements, and can be easily erased after the oily mark pen is scrawled.