CN115612384A

CN115612384A - Coating and preparation method and application thereof

Info

Publication number: CN115612384A
Application number: CN202211120489.7A
Authority: CN
Inventors: 王�琦; 陈寿生; 刘志刚
Original assignee: Zhuhai Zhanchen New Material Co ltd
Current assignee: Zhuhai Zhanchen New Material Co ltd
Priority date: 2022-09-15
Filing date: 2022-09-15
Publication date: 2023-01-17

Abstract

The application provides a coating and a preparation method and application thereof, wherein the coating comprises a component A and a component B, and the component A comprises the following components in parts by weight: 40-65 parts of synthetic fatty acid resin; 15-30 parts of polyaspartic acid ester resin; 0.2-0.5 part of defoaming agent; 0.5-1.5 parts of a leveling agent; 15-25 parts of a solvent A; the synthetic fatty acid resin contains hydroxyl groups; the component B comprises the following components in parts by weight: 15-25 parts of aliphatic isocyanate curing agent; 30-50 parts of toluene diisocyanate adduct curing agent; 35-45 parts of solvent B. The component A is compounded by taking synthetic fatty acid resin and polyaspartic acid ester resin as main raw materials; when in application, the component A and the component B are matched for use; the toluene diisocyanate addition product curing agent reacts with the synthetic fatty acid resin and the polyaspartic acid ester resin, so that the drying speed is high, and the hardness is high; the two are compounded for use, and the formed coating film is fast in drying, hard and tough and good in wear resistance.

Description

Coating and preparation method and application thereof

Technical Field

The application belongs to the technical field of coatings, and particularly relates to a coating as well as a preparation method and application thereof.

Background

The coating is traditionally named as paint in China. The coating is a continuous film which is coated on the surface of an object to be protected or decorated and can form firm adhesion with the object to be coated, and is a viscous liquid which is prepared by taking resin, oil or emulsion as a main material, adding or not adding pigments and fillers, adding corresponding auxiliaries and using an organic solvent or water.

The furniture coating is special paint for the surface of furniture, can make the furniture more beautiful and bright, improves the rough hand feeling of the furniture, plays a role in protecting and maintaining the furniture, and can make the whole family life more comfortable. In the coating of high-grade furniture, the high-gloss coating film has good distinctness of image, convex mirror surface effect, high gloss and plump coating film.

However, the drying speed of the high-gloss furniture coating on the market is too slow, finger pressure can not be performed for 4 hours at normal temperature, the coated furniture can not be stacked and packed for 24 hours, the working efficiency is influenced, and the dried furniture can be shrunk after being placed for a period of time, so that the furniture coating is orange peel-shaped, the gloss is reduced, and the attractiveness is reduced.

Disclosure of Invention

Based on the above, an object of the present application is to provide a coating, so as to solve the technical problems existing in the prior art that the drying speed of the high-gloss furniture coating on the market is too slow, finger pressure cannot be performed for 4 hours at normal temperature, the coated furniture cannot be stacked and packed for 24 hours, the working efficiency is affected, and after the dried furniture is placed for a period of time, the coating shrinks, a orange peel shape is formed, the gloss is reduced, and the aesthetic degree is reduced.

It is a further object of the present application to provide a method for preparing the above coating.

It is a further object of the present application to provide the use of the above-described coatings in the painting of furniture.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

the coating comprises a component A and a component B, wherein the component A comprises the following components in parts by weight:

the synthetic fatty acid resin contains hydroxyl groups;

the component B comprises the following components in parts by weight:

15-25 parts of aliphatic isocyanate curing agent;

30-50 parts of toluene diisocyanate adduct curing agent;

35-45 parts of solvent B.

Optionally, the mass ratio of the component A to the component B is 1: (0.8-1.2); and/or the presence of a gas in the atmosphere,

the solid content of the coating is more than or equal to 65 percent.

Alternatively, the synthetic fatty acid resin is a polyol resin; and/or the presence of a gas in the atmosphere,

the polyaspartic acid ester resin comprises at least one of F421 of Shenzhen Feizhang Endustries company, desmophen NH 1520 and Desmophen NH 1420 of Germany scientific creative company.

Optionally, the leveling agent comprises at least one of a polyether modified organic silicon leveling agent and an acrylate leveling agent; and/or the presence of a gas in the atmosphere,

the defoamer includes a silicone defoamer.

Optionally, the leveling agent is a mixture of a polyether modified organic silicon leveling agent and an acrylate leveling agent, and the mass ratio of the polyether modified organic silicon leveling agent to the acrylate leveling agent is (2-5): (3-10).

Optionally, the a solvent comprises butyl acetate and/or propylene glycol methyl ether acetate; and/or the presence of a gas in the gas,

the solvent B comprises at least one of ethyl acetate, propyl acetate and butyl acetate.

Optionally, the solvent A is a mixture of butyl acetate and propylene glycol methyl ether acetate, and the mass ratio of the butyl acetate to the propylene glycol methyl ether acetate is (3-8): (10-20).

And, a method for preparing a coating, comprising the steps of:

carrying out first mixing treatment on the synthetic fatty acid resin, the polyaspartic acid ester resin and a part of solvent to obtain a first mixed material;

carrying out second mixing treatment on the first mixed material, a defoaming agent and a flatting agent to obtain a second mixed material;

and carrying out third mixing treatment on the second mixed material and the residual solvent to obtain the component A.

Optionally, the method of preparing the coating comprises at least one of the following conditions:

the temperature of the first mixing treatment is controlled to be 20-45 ℃, and the mixing speed is 700-800 rpm;

the temperature of the second mixing treatment is controlled to be 20-45 ℃, and the mixing speed is 800-1000 rpm;

the temperature of the third mixing treatment is controlled to be 20-45 ℃, and the mixing speed is 700-800 rpm.

And the use of any of the above-described coatings in furniture coating.

1. The coating provided by the application comprises a component A and a component B, wherein the component A is compounded by taking synthetic fatty acid resin and polyaspartic acid ester resin as main raw materials, so that on one hand, the glossiness and the fullness of a coating film can be improved, and on the other hand, the hardness and the dryness of the coating film can be improved; when the paint is applied, the component A and the component B are matched for use, the component B is compounded by taking an aliphatic isocyanate curing agent and a toluene diisocyanate adduct curing agent as main raw materials, and a coating formed by the reaction of the aliphatic isocyanate curing agent, synthetic fatty acid resin and polyaspartic acid ester resin is good in flexibility and yellowing resistance; the toluene diisocyanate adduct curing agent reacts with the synthetic fatty acid resin and the polyaspartic acid ester resin, so that the drying speed is high, and the hardness is high; the two are compounded for use, and the formed coating film is quick to dry, hard and tough and good in wear resistance; compared with the prior art, the coating formed by the coating has the advantages of good distinctness of image, high gloss, plump coating, high hardness, strong adhesive force and good wear resistance, and the drying speed is accelerated, and the working efficiency is improved;

2. according to the preparation method of the coating, the mixing sequence is optimized according to the properties of the materials in the component A, so that the coating which is good in dispersity and free of agglomeration is obtained, and the preparation method is simple, low in cost, high in efficiency and suitable for industrial popularization;

3. the paint provided by the application can be applied to furniture coating, and when the paint is sprayed, prickly heat and hidden bubbles are not generated in one-time thick coating construction, so that the paint has the advantages of being fast in drying, hard and tough, good in wear resistance, good in yellowing resistance and the like, and is wide in application range.

Detailed Description

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear, the following embodiments further describe the present application in detail. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The embodiment of the application provides a coating which can be applied to furniture coating and can obtain a good coating effect. The coating comprises a component A and a component B, wherein the component A comprises the following components in parts by weight:

the synthetic fatty acid resin contains hydroxyl groups;

the component B comprises the following components in parts by weight:

15-25 parts of aliphatic isocyanate curing agent;

30-50 parts of toluene diisocyanate adduct curing agent;

35-45 parts of solvent B.

The coating provided by the embodiment of the application comprises a component A and a component B, wherein the component A and the component B are separately configured when not used, and the component A and the component B are mixed when used to obtain the coating.

The component A is compounded by taking synthetic fatty acid resin and polyaspartic acid ester resin as main raw materials, the polyaspartic acid ester resin is synthesized by a Michael addition method of aliphatic diamine and maleic acid ester, the aliphatic compound containing secondary amino groups-NH is synthesized, the synthetic fatty acid resin contains hydroxyl groups-OH, and the secondary amino groups of the polyaspartic acid ester resin and the hydroxyl groups of the synthetic fatty acid resin can react with isocyanate groups-NCO in a curing agent.

The reaction rate of the secondary amino group with the isocyanate group is faster than that of the hydroxyl group with the isocyanate group, and the addition of polyaspartic acid ester can contribute to the acceleration of the drying rate. And the polyaspartic ester resin has small molecular weight and a dicyclohexyl structure, and ester bonds with high density on a polyaspartic ester branched chain also provide strong polar groups for a macromolecular chain, so that a coating film has strong cohesive force, outstanding mechanical strength and increased hardness.

The component B takes an aliphatic isocyanate curing agent and a toluene diisocyanate adduct curing agent as main raw materials, wherein the aliphatic isocyanate curing agent has a slower reaction rate than the toluene diisocyanate curing agent, and the aliphatic isocyanate curing agent and the toluene diisocyanate curing agent are compounded for use to adjust the overall reaction rate.

When the paint is applied, the component A and the component B are matched for use, and a coating film formed by the reaction of the aliphatic isocyanate curing agent, the synthetic fatty acid resin and the polyaspartic acid ester resin has good flexibility and good yellowing resistance; the toluene diisocyanate addition product curing agent reacts with the synthetic fatty acid resin and the polyaspartic acid ester resin, so that the drying speed is high, and the hardness is high; the aliphatic isocyanate curing agent and the toluene diisocyanate are compounded for use, and are coordinated with the reaction rate of the synthetic fatty acid resin and the polyaspartic acid ester resin in the component A, so that the drying speed of the coating film is increased, and the formed coating film is hard and tough and has good wear resistance.

The simple chemical equation of the crosslinking reaction of the component A and the component B is as follows:

compared with the prior art, the coating formed by the coating provided by the embodiment of the application has the advantages of good distinctness of image, high gloss, plump coating, high hardness, strong adhesive force, good wear resistance, high drying speed and capability of improving the working efficiency.

In some embodiments, the coating comprises a component A and a component B, wherein the component A comprises the following components in parts by weight:

the synthetic fatty acid resin contains hydroxyl groups;

the component B comprises the following components in parts by weight:

15-25 parts of aliphatic isocyanate curing agent;

40-50 parts of toluene diisocyanate adduct curing agent;

35-45 parts of a solvent B.

Optionally, the mass ratio of the component A to the component B is 1: (0.8-1.2), the weight portions of the component A and the component B in the coating are 100 portions of the component A and 80-120 portions of the component B. By controlling the mass ratio of the component A to the component B, the crosslinking reaction effect of the component A and the component B is further improved, and the excellent performance of the obtained coating is ensured.

Alternatively, the synthetic fatty acid resin is a polyol resin, and provides a plurality of hydroxyl groups, so that crosslinking sites are increased, a crosslinking structure is enhanced, and the stability and mechanical strength of the coating film are further improved. In some embodiments, the synthetic fatty acid resin is a synthetic polyol resin of isooctanoic acid, isononanoic acid, trimethylolpropane, and the like.

Optionally, the synthetic fatty acid resin is selected from at least one of JD1386-80 of new materials of Zhongzhahi Zhan, ETERKYD 3755-X-80 of Changxing chemical industries, and A931-80 of Taiwan Dali high molecular materials, wherein the synthetic fatty acid resins are all polyhydric alcohol resins and can be matched with polyaspartic ester resin to react with the component B to obtain good crosslinking effect.

In some embodiments, the synthetic fatty acid resin is added in a weight part of 40 parts, 45 parts, 50 parts, 55 parts, 60 parts, 65 parts, etc., or any part between 40-65 parts.

The polyaspartic ester resin comprises at least one of F421 of Shenzhen Feiyang actual Limited, desmophen NH 1520 of Germany scientific creative company and Desmophen NH 1420, and the polyaspartic ester resin with the types can coordinate the reaction rate with the synthetic fatty acid resin and react with the component B to obtain good crosslinking effect. In some embodiments, the polyaspartic ester resin is added in a weight part of 15 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, or 30 parts.

Optionally, the defoaming agent comprises an organic silicon defoaming agent, and the organic silicon defoaming agent has good compatibility in a coating system and cannot cause the fog phenomenon of a coating film of the coating. The silicone defoamer includes but is not limited to at least one of BYK-141 from BYK, germany, and HX-2010 from Huaxia, guangzhou, inc.

In some embodiments, the defoamer is added in an amount of 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, or 0.5 parts by weight, and the defoaming effect of the coating material sprayed on the surface of furniture is optimized in this weight range.

The leveling agent has the function of reducing the surface tension of the coating, so that the coating can be automatically leveled after a substrate is wetted after construction, pathological phenomena such as orange peel and shrinkage cavity are avoided, and the smoothness and the anti-blocking property of the surface of a coating film can be increased.

Optionally, the leveling agent comprises at least one of a polyether modified organic silicon leveling agent and an acrylate leveling agent, the polyether modified organic silicon leveling agent can improve short-wave leveling and provide smoothness, and the acrylate leveling agent can improve long-wave leveling and assist defoaming action.

In some embodiments, the polyether modified silicone leveling agent is at least one of BYK-306 of BYK, germany, TEGO-450 of TEGO chemical industry, and HX-3050 of Guangzhou Huaxia additive. The acrylate leveling agent is at least one of BYK-358N of Germany BYK company, EFKA-3777 and EFKA-3600 of Netherlands EFKA company.

In some embodiments, the leveling agent is a mixture of a polyether modified organic silicon leveling agent and an acrylate leveling agent, and the mass ratio of the polyether modified organic silicon leveling agent to the acrylate leveling agent is (2-5): (3-10). The polyether modified organic silicon flatting agent and the acrylate flatting agent are compounded to form the flatting agent, and after spraying, a coating film is good in flatting, good in hand feeling and good in anti-blocking performance.

Optionally, the addition of the leveling agent is preferably 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1.0 part, 1.1 part, 1.2 parts, 1.3 parts, 1.4 parts or 1.5 parts by weight based on 100 parts by weight of the component A, and within the range of the parts by weight, the leveling effect, the plate surface smoothness, the hand feeling and the anti-blocking property of the coating when the coating is sprayed on the surface of furniture can be optimized.

When the leveling agent is a mixture of the polyether modified organic silicon leveling agent and the acrylate leveling agent, the leveling agent comprises 0.2-0.5 part of the polyether modified organic silicon leveling agent, such as but not limited to 0.2 part, 0.3 part, 0.4 part or 0.5 part of the A component; 0.3 to 1.0 part of acrylate leveling agent, such as but not limited to 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1.0 part, 1.1 part or 1.2 parts.

Alternatively, the A solvent comprises butyl acetate and/or propylene glycol methyl ether acetate, and both the butyl acetate and the propylene glycol methyl ether acetate can provide a good solution environment for the synthetic fatty acid resin, the polyaspartic acid ester resin and other components in the A component, and can not react with each component.

In some embodiments, the solvent A is a mixture of butyl acetate and propylene glycol methyl ether acetate, and the mass ratio of the butyl acetate to the propylene glycol methyl ether acetate is (3-8): (10-20). The butyl acetate is high in volatilization speed, can be applied to normal-temperature small-area spraying and can be quickly dried; when large-area construction or high-temperature weather construction is carried out, leveling of the coating film can be influenced, leveling of the coating film is poor, and miliaria is easy to generate during construction under high-temperature conditions. Propylene glycol methyl ether acetate has a high boiling point and a low volatilization speed, and is easy to fall on dust during large-area coating construction of paint, so that the coating effect is influenced.

Therefore, in some preferred embodiments, butyl acetate and propylene glycol methyl ether acetate are mixed to be used as the solvent A to adjust the overall volatilization speed, the volatilization is moderate, and further the drying speed is adjusted. Specifically, butyl acetate may be butyl acetate in courtson chemical industry, and propylene glycol methyl ether acetate may be propylene glycol methyl ether acetate in Jiangsu Yida corporation.

Optionally, the solvent comprises, based on 100 parts by weight of the a component in total: 3-8 parts of butyl acetate, such as but not limited to 3 parts, 5 parts and 8 parts; 10-20 parts of propylene glycol methyl ether acetate, for example, including but not limited to 10 parts, 15 parts and 20 parts.

In some embodiments, the aliphatic isocyanate curing agent may be selected from the group consisting of the isocyanate curing agents of Kestew, germany

N3390, WANNATE HT-100 from Vanhua Chemicals.

In some embodiments, the toluene diisocyanate adduct curing agent may be selected from the group consisting of Kestew, germany

L-75, WANNATE L-75 from Vanhua chemical company.

Optionally, the solvent B comprises at least one of ethyl acetate, propyl acetate and butyl acetate, wherein the volatilization speed of the butyl acetate is high, and when the component B and the component A are mixed and reacted, the solvent B and the solvent A coordinate to ensure that the drying speed of the coating film is moderate.

Optionally, the solid content of the coating is more than or equal to 65%.

The embodiment of the application also provides a preparation method of the coating, which comprises the following steps:

s10: carrying out first mixing treatment on the synthetic fatty acid resin, the polyaspartic acid ester resin and part of solvent to obtain a first mixed material;

s20: carrying out second mixing treatment on the first mixed material, a defoaming agent and a flatting agent to obtain a second mixed material;

s30: and carrying out third mixing treatment on the second mixed material and the residual solvent to obtain the component A.

Optionally, the preparation method of the coating comprises at least one of the following conditions:

the control temperature of the first mixing treatment is 20-45 ℃, and the mixing speed is 700-800 rpm;

The preparation method of the coating provided by the embodiment of the application optimizes the mixing sequence according to the properties of the materials in the component A so as to obtain the coating with good dispersibility and no agglomeration, and the preparation method is simple, low in cost, high in efficiency and suitable for industrial popularization.

The coating provided by the embodiment of the application can be applied to furniture coating, and when the coating is sprayed, prickly heat and hidden bubbles are not generated in one-time thick coating construction, so that the coating has the advantages of being fast in drying, hard and tough, good in wear resistance, good in yellowing resistance and the like, and is wide in application range.

The following is illustrated by a number of examples.

Component A1

The component and the weight part content of the A component 1 are shown in the table 1.

TABLE 1

Wherein, in the leveling agent, BYK-306 is 0.3, and BYK-358N is 1.0 part.

The preparation method of the component A1 comprises the following steps:

s01, weighing the raw materials of the components according to the components and the parts by weight in the table 1;

s02, mixing synthetic fatty acid resin, polyaspartic acid ester resin and a part of solvent at the temperature of lower than 45 ℃ and the stirring speed of 800rpm for 5min to obtain a first mixed material;

s03, mixing the first mixed material, the defoaming agent and the flatting agent at a temperature lower than 45 ℃ and at a stirring speed of 800rpm for 15min to obtain a second mixed material;

and S04, mixing the second mixed material and the residual solvent at the temperature of lower than 45 ℃ and at the speed of 800rpm, and stirring for 5min to obtain the component A1.

The appearance of the obtained A component 1 was a water-white, clear, transparent, viscous liquid, and the base paint viscosity was 95KU (30 ℃, stormer viscometer).

Component A2

The component and part by weight contents of component A2 are shown in Table 2.

TABLE 2

In the leveling agent, BYK-306 is 0.3 part, EFKA-3777 is 1.0 part

The preparation method of the component A2 comprises the following steps:

s01, weighing the raw materials of the components according to the components and the parts by weight of the components A in the table 2;

s02, mixing synthetic fatty acid resin, polyaspartic acid ester resin and a part of solvent at the temperature of lower than 45 ℃ and the stirring speed of 700rpm for 10min to obtain a first mixed material;

s03, mixing the first mixed material with a defoaming agent and a leveling agent at the temperature of lower than 45 ℃ and the stirring speed of 1000rpm, and stirring for 10min to obtain a second mixed material;

and S04, mixing the second mixed material and the residual solvent at the temperature of lower than 45 ℃ and at the speed of 800rpm, and stirring for 5min to obtain a component A2.

The appearance of the resulting A component 2 was a water-white, clear, transparent, viscous liquid with a base paint viscosity of 95KU (30 ℃, stormer viscometer).

Component A3

The component and part by weight contents of component A3 are shown in Table 3.

TABLE 3

In the leveling agent, 0.2 part of TEGO-450 and 0.3 part of EFKA-3600 are added.

The preparation method of the component A3 is the same as that of the component A1.

Component A4

The component and part by weight contents of the a component 4 are shown in table 4.

TABLE 4

In the leveling agent, 0.2 part of TEGO-450 and 0.6 part of EFKA-3777 are used.

The preparation method of the component A4 is the same as that of the component A1.

Component A5

The component and part by weight contents of the a component 5 are shown in table 5.

TABLE 5

In the leveling agent, 0.5 part of HX-3050 and 0.5 part of EFKA-3777 are added.

The preparation method of the component A5 is the same as that of the component A1.

Component A6

The components and the weight part content of the A component 6 are shown in Table 6.

TABLE 6

In the leveling agent, BYK-306 is 0.3 part, and EFKA-3600 is 0.3 part.

The preparation method of the component A6 is the same as that of the component A1.

B component 1

The component B1 comprises the following components in parts by weight: 15 parts of aliphatic isocyanate curing agent, 50 parts of toluene diisocyanate adduct curing agent and 35 parts of butyl acetate.

Wherein the aliphatic isocyanate curing agent can be selected from Germany Corsso

N3390 toluene diisocyanate adduct curing agent may be selected from Korsakow

L-75, butyl acetateIs selected from butyl acetate produced by cantonese chemical company in Guangdong.

Component B2

The component B2 consists of the following components in parts by weight: 20 parts of aliphatic isocyanate curing agent, 45 parts of toluene diisocyanate adduct curing agent and 35 parts of butyl acetate.

Wherein the aliphatic isocyanate curing agent can be WANNATE HT-100 of Wanhua chemical company, and the toluene diisocyanate adduct curing agent can be WANNATE HT-100 of Germany Corsai corporation

L-75, butyl acetate is selected from butyl acetate produced by the Guangdong modesty chemical company.

Component B3

The component B3 comprises the following components in parts by weight: 25 parts of aliphatic isocyanate curing agent, 40 parts of toluene diisocyanate adduct curing agent and 35 parts of butyl acetate.

Wherein the aliphatic isocyanate curing agent is HT-100 produced by Van der Waals chemical company, and the toluene diisocyanate adduct curing agent can be WANNATE L-75 produced by Van der Waals chemical company; butyl acetate is selected from butyl acetate produced by modesty, guangdong, chemical company.

The preparation method of the component B comprises the following steps:

respectively weighing an aliphatic isocyanate curing agent, a toluene diisocyanate adduct curing agent and butyl acetate according to corresponding proportions;

and mixing the aliphatic isocyanate curing agent, the toluene diisocyanate adduct curing agent and butyl acetate to obtain the component B.

The combinations of the A and B components of the coating examples are shown in Table 7 below.

TABLE 7

	Component A	Component A weight portions	B component	Component B parts by weight
					Example 1	Component A1	100	B component 1	80
Example 2	Component A2	100	B component 1	80
					Example 3	Component A3	100	B component 1	80
Example 4	Component A4	100	B component 1	80
					Example 5	Component A5	100	B component 1	80
Example 6	Component A6	100	B component 1	80
					Example 7	Component A1	100	Component B2	100
Example 8	Component A2	100	Component B2	100
					Example 9	Component A3	100	Component B2	100
Example 10	Component A4	100	Component B2	100
					Example 11	Component A5	100	Component B2	100
Example 12	Component A6	100	Component B2	100
					Example 13	Component A1	100	Component B2	120
Example 14	Component A2	100	Component B2	120
					Example 15	Component A3	100	Component B2	120
Example 16	Component A4	100	Component B2	120
					Example 17	Component A5	100	Component B2	120
Example 18	Component A6	100	Component B3	120

An appropriate amount of a diluent was added to each of the coatings of examples 1 to 18, the viscosity was adjusted to the application viscosity, the coating was applied by a spray coating method, and the properties of the coating film, such as the surface drying time, the actual drying time, the hardness, and the adhesion, were measured, and the measurement results are shown in table 8.

TABLE 8

According to the test results, the surface drying time of the coating films of the coatings of the examples 1 to 18 is less than or equal to 60 minutes after the coating is sprayed; the actual drying time is less than or equal to 24 hours; the hardness is more than or equal to H; 1 grade of adhesive force; the gloss is more than or equal to 98.5. The normal temperature drying property of the coating is improved by adding polyaspartic acid ester resin, and relatively speaking, the more the synthesized fatty acid resin is, the slower the drying is, the poorer the hardness is, and the poorer the wear resistance is; the more the polyaspartic acid ester resin is, the faster the drying is, the better the hardness is, and the better the collapse resistance is (the better the flatness of the paint film is seen when the sprayed substrate is naturally placed for 3 months, the better the collapse resistance of the paint film is, the better the flatness is), but the time can be shortened by the paint prepared by combining the synthetic fatty acid resin and the polyaspartic acid ester resin, and the film coating property is good.

To sum up, the coating provided by the embodiment of the application adopts two components to be matched for use, the component A is compounded by taking synthetic fatty acid resin and polyaspartic ester resin as main raw materials, the component B is compounded by taking aliphatic isocyanate curing agent and toluene diisocyanate adduct curing agent as main raw materials, and the crosslinking reaction speed and the crosslinking structure of the synthetic fatty acid resin, the polyaspartic ester resin, the aliphatic isocyanate curing agent and the toluene diisocyanate adduct curing agent are adjusted by using the two components in a compounding way, so that a coating formed after the coating is constructed is fast in drying, hard and tough, and good in wear resistance.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A coating, characterized by: the adhesive comprises a component A and a component B, wherein the component A comprises the following components in parts by weight:

the synthetic fatty acid resin contains hydroxyl groups;

the component B comprises the following components in parts by weight:

15-25 parts of aliphatic isocyanate curing agent;

30-50 parts of toluene diisocyanate adduct curing agent;

35-45 parts of solvent B.

2. The coating of claim 1, wherein: the mass ratio of the component A to the component B is 1: (0.8-1.2); and/or the presence of a gas in the gas,

the solid content of the coating is more than or equal to 65 percent.

3. The coating of claim 1, wherein: the synthetic fatty acid resin is a polyol resin; and/or the presence of a gas in the gas,

the polyaspartic acid ester resin comprises at least one of F421 of Shenzhen Feizang Endustries company, desmophen NH 1520 and Desmophen NH 1420 of Germany scientific creative company.

4. The coating of claim 1, wherein: the flatting agent comprises at least one of a polyether modified organic silicon flatting agent and an acrylate flatting agent; and/or the presence of a gas in the gas,

the defoamer comprises a silicone defoamer.

5. The coating of claim 4, wherein: the leveling agent is a mixture of a polyether modified organic silicon leveling agent and an acrylate leveling agent, and the mass ratio of the polyether modified organic silicon leveling agent to the acrylate leveling agent is (2-5): (3-10).

6. The coating of claim 1, wherein: the solvent A comprises butyl acetate and/or propylene glycol methyl ether acetate; and/or the presence of a gas in the atmosphere,

7. The coating of claim 1, wherein: the solvent A is a mixture of butyl acetate and propylene glycol monomethyl ether acetate, and the mass ratio of the butyl acetate to the propylene glycol monomethyl ether acetate is (3-8): (10-20).

8. The process for producing a coating material according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:

and carrying out third mixing treatment on the second mixed material and the rest solvent to obtain the component A.

9. The method of preparing a coating according to claim 8, wherein: comprising at least one of the following conditions:

the control temperature of the second mixing treatment is 20-45 ℃, and the mixing speed is 800-1000 rpm;

the control temperature of the third mixing treatment is 20-45 ℃, and the mixing speed is 700-800 rpm.

10. Use of the coating according to any one of claims 1 to 7 in the finishing of furniture.