阅读说明：本技术 一种便于机械臂喷涂的uv固化哑光白面漆及其制备方法 (UV-cured matte white finish convenient for spraying of mechanical arm and preparation method thereof ) 是由 敬小松 郑建鹏 谢灯咨 于 2021-08-20 设计创作，主要内容包括：本发明提供了一种便于机械臂喷涂的UV固化哑光白面漆,选用了聚氨酯丙烯酸酯树脂作为UV固化哑光白面漆的主体树脂,其极性小分子量大,同时具有较好的润湿流平性,另外还复配润湿剂、流平剂、防尘助剂等,使得哑光白面漆既能放流挂又能流平,利用机械臂喷涂可一次完成工件多个面的喷涂,简化了哑光白面漆的施工难度,提高了施工效率。本发明还提供了上述UV固化哑光白面漆的制备方法。该制备方法制备得到的UV固化哑光白面漆,气味低,更环保；此外,该哑光白面漆还具有一定的可回收性,可以重复利用,利于降低生成成本。(The invention provides a UV curing matte white finish convenient for spraying of a mechanical arm, which selects polyurethane acrylate resin as main resin of the UV curing matte white finish, has large polarity and molecular weight and better wetting leveling property, is compounded with a wetting agent, a leveling agent, a dustproof auxiliary agent and the like, so that the matte white finish can be subjected to sagging and leveling, can be sprayed on multiple surfaces of a workpiece at one time by spraying of the mechanical arm, simplifies the construction difficulty of the matte white finish, and improves the construction efficiency. The invention also provides a preparation method of the UV-cured matte white finish. The UV-cured matte white finish prepared by the preparation method is low in smell and more environment-friendly; in addition, the matte white finish also has certain recyclability, can be repeatedly utilized and is beneficial to reducing the generation cost.)

1. The UV-cured matte white finish paint convenient for spraying of mechanical arms is characterized by comprising the following components in parts by weight:

25-30 parts of polyurethane acrylate resin,

0.05 to 1 portion of wetting agent,

0.05 to 1 portion of defoaming agent,

0.1 to 0.5 portion of anti-settling additive,

18-20 parts of titanium dioxide powder,

8-12 parts of cellulose acetate butyrate solution,

0.1 to 3 portions of flatting agent,

1-5 parts of a photoinitiator,

15-20 parts of 1-6 hexanediol diacrylate,

3-5 parts of hydroxyethyl methacrylate,

5-8 parts of matte powder,

10-15 parts of an organic solvent.

2. The UV-curable matte white finish according to claim 1, which comprises the following components in parts by weight:

28 parts of polyurethane acrylate resin, namely 28 parts of polyurethane acrylate resin,

0.5 part of wetting agent is added,

0.8 part of defoaming agent, namely,

0.3 part of anti-settling auxiliary agent,

20 parts of titanium dioxide powder, namely 20 parts of titanium dioxide,

8 parts of cellulose acetate butyrate liquid, namely,

2 parts of a leveling agent, namely 2 parts of,

4.4 parts of a photoinitiator,

15 parts of 1-6 hexanediol diacrylate,

3 parts of hydroxyethyl methacrylate, wherein the weight ratio of the hydroxyethyl methacrylate,

6 parts of matte powder, namely 6 parts of matte powder,

15 parts of organic solvent.

3. The UV-curable matte white finish according to claim 1, which comprises the following components in parts by weight:

25 parts of polyurethane acrylate resin, namely 25 parts of polyurethane acrylate resin,

0.5 part of wetting agent is added,

0.5 part of defoaming agent, 0.5 part of,

0.2 part of anti-settling auxiliary agent,

20 parts of titanium dioxide powder, namely 20 parts of titanium dioxide,

12 parts of cellulose acetate butyrate liquid, namely,

2.1 parts of a leveling agent,

4.4 parts of a photoinitiator,

15 parts of 1-6 hexanediol diacrylate,

4 parts of hydroxyethyl methacrylate, wherein the weight ratio of the hydroxyethyl methacrylate,

5.3 parts of matte powder, namely,

15 parts of organic solvent.

4. The UV-curable matte white finish according to claim 1, wherein the polyurethane acrylate resin is one or two of polyester aliphatic polyurethane acrylate and acrylate modified polyurethane acrylate.

5. The UV-curable matte white finish according to claim 1, characterized in that,

the wetting agent is an organic silicon modified wetting agent;

the defoaming agent is an acrylate defoaming agent or an organic silicon modified defoaming agent.

6. The UV-curable matte white finish according to claim 1, wherein the anti-settling additive is one or both of a fumed silica anti-settling agent or a polyamide wax anti-settling agent; the titanium dioxide is in a rutile type structure.

7. The UV-curable matte white finish according to claim 1, wherein the leveling agent is an aralkyl-modified polymethylalkylsiloxane;

the photoinitiator is at least one of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, bis (2,4, 6-trimethylbenzoyl) phenylphosphine oxide, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-acetone or 2-methyl-2- (4-morpholinyl) -1- [4- (methylthio) phenyl ] -1-acetone.

8. The UV-curable matte white finish according to claim 1, wherein the matte powder is silica and the organic solvent is at least one of toluene, xylene, butyl acetate, ethyl acetate.

9. The UV-curable matte white finish according to claim 1, wherein the mass concentration of the cellulose acetate butyrate solution is 20-30 wt%.

10. A process for the preparation of a UV-curable matte white finish according to any one of claims 1 to 9, comprising the following steps:

s1, weighing polyurethane acrylate resin according to parts by weight, putting the polyurethane acrylate resin into a reaction kettle, then sequentially weighing a wetting agent, a defoaming agent and an anti-settling auxiliary agent under the condition that the stirring speed is 600-800rpm, adding the weighed wetting agent, the defoaming agent and the anti-settling auxiliary agent into the reaction kettle, and dispersing for 8-10 min;

s2, weighing titanium dioxide, slowly putting the titanium dioxide into the reaction kettle, increasing the rotating speed to 1000-1200rpm, and dispersing for 20-25 min;

s3, then reducing the stirring speed of the reaction kettle to 400-600rpm, continuously adding the cellulose acetate butyrate liquid, the flatting agent, the photoinitiator, the 1-6 hexanediol diacrylate and the hydroxyethyl methacrylate into the reaction kettle, and dispersing for 8-10 min;

s4, weighing the matte powder, slowly putting the matte powder into the reaction kettle, and then increasing the rotating speed to 1000-1200rpm for dispersing for 10-15 min;

s5, finally, reducing the stirring speed of the reaction kettle to 400-600rpm, adding an organic solvent into the reaction kettle, dispersing for 8-10min to form a paint liquid, and storing for later use.

Technical Field

The invention relates to the technical field of coating production, in particular to UV (ultraviolet) curing matte white finish convenient for spraying of a mechanical arm and a preparation method thereof.

Background

With the development of coating technology, the requirements of users on the environmental protection of paint construction are higher and higher, and the traditional paint construction method has the problems of higher difficulty, lower working efficiency, poorer uniformity of a formed paint film and the like, so that the use requirements of users can not be met gradually. In order to overcome the defects of the traditional paint construction method and achieve the purpose of improving the coating quality, people develop a spraying process of a mechanical arm in recent years.

The mechanical arm spraying process is a spraying method which utilizes a mechanical arm to simulate a human arm and adopts an air spray gun to spray paint particles on the surface of a workpiece according to a manual spraying construction method. Compared with the traditional spraying process, the spraying method has higher production capacity, is convenient for realizing mechanized, automatic and continuous production, has the utilization rate of the coating as high as 80-90 percent, and is a coating method with the highest utilization rate of the paint. For example, the spraying construction of 6 faces of the wooden door workpiece can be solved at one time by using a production line mode, and the spraying efficiency is high.

The mechanical arm spraying process has strict requirements on the coating, and particularly has higher requirements on the balance of sagging prevention and leveling of the coating. The prior UV white finish paint for reciprocating spraying in China can only be applied to a plane and a small vertical surface by a reciprocating spraying machine, and can not meet the construction requirements of the shape and the turnover of a wooden door.

Therefore, it is very important to develop a finish paint convenient for spraying construction of the mechanical arm.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides the UV-cured matte white finish convenient for spraying by the mechanical arm, polyurethane acrylate resin is selected as the main resin of the UV-cured matte white finish, the polarity is large, the molecular weight is large, the wetting leveling property is good, and in addition, a wetting agent, a leveling agent, a dustproof auxiliary agent and the like are compounded, so that the matte white finish can be subjected to sagging and leveling, the spraying of multiple surfaces of a workpiece can be completed by spraying by the mechanical arm at one time, the construction difficulty of the matte white finish is simplified, and the construction efficiency is improved. The invention also provides a preparation method of the UV-cured matte white finish.

In order to achieve the purpose, the invention provides the following technical scheme:

the UV-cured matte white finish paint convenient for spraying of mechanical arms comprises the following components in parts by weight:

preferably, the UV-cured matte white finish paint convenient for spraying of the mechanical arm comprises the following components in parts by weight:

preferably, the UV-cured matte white finish paint convenient for spraying of the mechanical arm comprises the following components in parts by weight:

as a further description of the technical solution of the present invention, the urethane acrylate resin is one or two of polyester type aliphatic urethane acrylate and acrylate modified urethane acrylate.

As a further description of the technical solution of the present invention, the wetting agent is an organosilicon modified wetting agent;

the defoaming agent is an acrylate defoaming agent or an organic silicon modified defoaming agent.

As further description of the technical scheme of the invention, the anti-settling auxiliary agent is one or two of a fumed silica anti-settling agent or a polyamide wax anti-settling agent; the titanium dioxide is in a rutile type structure.

As further description of the technical scheme, the leveling agent is aralkyl modified polymethyl alkyl siloxane, and is mainly used for assisting resin film formation and providing leveling and sagging prevention effects;

the photoinitiator is at least one of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, bis (2,4, 6-trimethylbenzoyl) phenylphosphine oxide, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-acetone or 2-methyl-2- (4-morpholinyl) -1- [4- (methylthio) phenyl ] -1-acetone.

As a further description of the technical scheme of the invention, the matte powder is silicon dioxide, and the organic solvent is at least one of toluene, xylene, butyl acetate and ethyl acetate.

As further description of the technical scheme of the invention, the mass concentration of the cellulose acetate butyrate solution is 20-30 wt%.

The selection of the components and raw materials in the invention is specifically as follows:

the polyester aliphatic polyurethane acrylate is selected as the main resin in the matte white surface sprayed by the mechanical arm, and the polyurethane acrylate resin has small polarity, large molecular weight and relatively wetting and leveling property, so that the polyester aliphatic polyurethane acrylate can prevent sagging and can level, and is suitable for being used as the main resin in the matte white finish paint for the construction of the mechanical arm. Epoxy acrylate resin and polyester acrylate resin are not selected because epoxy acrylate resin has small polarity and high molecular weight and is difficult to balance leveling and sagging prevention; the polyester acrylate resin has small polarity and high molecular weight, and the slow dryness is not beneficial to being used in the solidification of the groove accumulated oil.

The active diluents are 1-6 hexanediol diacrylate (HDDA) and hydroxyethyl methacrylate (HEMA) which are directly selected, because the two active diluents can help extinction and reduce the reaction shrinkage of the finish paint, and the spraying effect of the finish paint is improved; and the solution power is good, the extinction is good, and the problem that the luster of the front side and the back side is inconsistent is best adjusted.

The wetting agent is an organic silicon modified wetting agent, the defoaming agent is an acrylate defoaming agent, the anti-settling auxiliary agent is a fumed silica anti-settling agent, and the titanium dioxide is rutile type with higher covering power and white value. The photoinitiator is used for initiating the polymerization, crosslinking and curing of monomers under the condition of illumination, and particularly 2-hydroxy-2-methyl-1-phenyl-1-acetone and bis (2,4, 6-trimethylbenzoyl) phenylphosphine oxide are used.

The invention also provides a preparation method of the UV-cured matte white finish, which comprises the following steps:

s1, weighing polyurethane acrylate resin according to parts by weight, putting the polyurethane acrylate resin into a reaction kettle, then sequentially weighing a wetting agent, a defoaming agent and an anti-settling auxiliary agent under the condition that the stirring speed is 600-800rpm, adding the weighed wetting agent, the defoaming agent and the anti-settling auxiliary agent into the reaction kettle, and dispersing for 8-10 min;

s2, weighing titanium dioxide, slowly putting the titanium dioxide into the reaction kettle, increasing the rotating speed to 1000-1200rpm, and dispersing for 20-25 min;

s3, then reducing the stirring speed of the reaction kettle to 400-600rpm, continuously adding the cellulose acetate butyrate liquid, the flatting agent, the photoinitiator, the 1-6 hexanediol diacrylate and the hydroxyethyl methacrylate into the reaction kettle, and dispersing for 8-10 min;

s4, weighing the matte powder, slowly putting the matte powder into the reaction kettle, and then increasing the rotating speed to 1000-1200rpm for dispersing for 10-15 min;

s5, finally, reducing the stirring speed of the reaction kettle to 400-600rpm, adding an organic solvent into the reaction kettle, dispersing for 8-10min to form a paint liquid, and storing for later use.

Based on the technical scheme, the invention has the following technical effects:

(1) the UV-cured matte white finish provided by the invention adopts the polyurethane acrylate resin with good wetting and leveling properties as a main film-forming substance, and adopts 1-6 hexanediol diacrylate (HDDA) and hydroxyethyl methacrylate (HEMA) with good matting properties as active diluents to be added, so that the finish has higher matting efficiency under the condition of ensuring that a paint film and construction properties are not changed, the construction requirements of flow release and hanging and leveling of mechanical arm spraying are met, and the production efficiency is improved.

(2) According to the preparation method of the UV-cured matte white finish, the prepared UV-cured matte white finish is beneficial to realizing mechanical construction and reducing the dependence on manpower, and the prepared paint film has good performance, low smell and environmental protection; in addition, the matte white finish also has certain recyclability, can be repeatedly utilized and is beneficial to reducing the generation cost.

Detailed Description

In order that the invention may be more fully understood, reference will now be made to the specific embodiments illustrated. The invention provides a preferred embodiment. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The UV-cured matte white finish paint convenient for spraying of mechanical arms comprises the following components in parts by weight:

the polyurethane acrylate resin is one or two of polyester aliphatic polyurethane acrylate and acrylate modified polyurethane acrylate.

The wetting agent is an organic silicon modified wetting agent;

the defoaming agent is an acrylate defoaming agent or an organic silicon modified defoaming agent.

The anti-settling auxiliary agent is one or two of a fumed silica anti-settling agent or a polyamide wax anti-settling agent; the titanium dioxide is in a rutile type structure.

The flatting agent is aralkyl modified polymethyl alkyl siloxane;

the photoinitiator is at least one of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, bis (2,4, 6-trimethylbenzoyl) phenylphosphine oxide, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-acetone or 2-methyl-2- (4-morpholinyl) -1- [4- (methylthio) phenyl ] -1-acetone.

The matte powder is silicon dioxide, and the organic solvent is at least one of toluene, xylene, butyl acetate and ethyl acetate.

The mass concentration of the cellulose acetate butyrate solution is 20-30 wt%.

Example 1

The UV-cured matte white finish paint convenient for spraying of mechanical arms comprises the following components in parts by weight:

the polyurethane acrylate resin of the embodiment selects polyester type aliphatic polyurethane acrylate, such as 6-functional polyester type aliphatic polyurethane acrylate of Changxing 6145-100, which is used as a main film forming substance, has large polarity and molecular weight, and simultaneously has wetting leveling property, and can prevent sagging and level. The active diluents are 1-6 hexanediol diacrylate (HDDA) and hydroxyethyl methacrylate (HEMA) which are directly selected, because the two active diluents can help extinction and reduce the reaction shrinkage of the finish paint, the finish paint spraying effect is improved, the finish paint has higher extinction rate under the condition that the paint film and the construction performance are not changed, and the construction requirement of mechanical arm spraying is met. The wetting agent is an organic silicon modified wetting agent, the defoaming agent is an acrylate defoaming agent, the anti-settling auxiliary agent is a fumed silica anti-settling agent, and the titanium dioxide is rutile type with higher covering power and white value. The photoinitiator is used for initiating the polymerization, crosslinking and curing of monomers under the condition of illumination, and particularly 2-hydroxy-2-methyl-1-phenyl-1-acetone and bis (2,4, 6-trimethylbenzoyl) phenylphosphine oxide are used. The matte powder is used as matting powder, silicon dioxide is selected, the flatting agent is aralkyl modified polymethyl alkyl siloxane, and the mass concentration of the cellulose acetate butyrate solution is 30 wt%. The organic solvent is butyl acetate.

The preparation method of the UV-cured matte white finish specifically comprises the following steps:

s1, weighing polyurethane acrylate resin according to parts by weight, putting the polyurethane acrylate resin into a reaction kettle, then sequentially weighing a wetting agent, a defoaming agent and an anti-settling auxiliary agent under the condition that the stirring speed is 600-800rpm, adding the weighed wetting agent, the defoaming agent and the anti-settling auxiliary agent into the reaction kettle, and dispersing for 8-10 min;

s2, weighing titanium dioxide, slowly putting the titanium dioxide into the reaction kettle, increasing the rotating speed to 1000-1200rpm, and dispersing for 20-25 min;

s3, then reducing the stirring speed of the reaction kettle to 400-600rpm, continuously adding the cellulose acetate butyrate liquid, the flatting agent, the photoinitiator, the 1-6 hexanediol diacrylate and the hydroxyethyl methacrylate into the reaction kettle, and dispersing for 8-10 min;

s4, weighing the matte powder, slowly putting the matte powder into the reaction kettle, and then increasing the rotating speed to 1000-1200rpm for dispersing for 10-15 min;

s5, finally, reducing the stirring speed of the reaction kettle to 400-600rpm, adding an organic solvent into the reaction kettle, dispersing for 8-10min to form a paint liquid D1, and storing for later use.

The viscosity of paint liquid product D1 was tested to be 65S (run out time for No. 2 rock).

According to the UV-cured matte white finish paint provided by the embodiment, the matte white finish paint is suitable for a mechanical arm spraying process, the mechanical arm spraying process can be used for spraying the matte white finish paint on six processing surfaces of a product at one time, the construction difficulty of the matte white surface is greatly simplified, the construction efficiency is convenient to improve, the whole construction process has small dependence on manpower, the introduction of human errors is reduced, and the obtained paint film has high flatness, small smell and environmental protection.

Example 2

The UV-cured matte white finish paint convenient for spraying of mechanical arms comprises the following components in parts by weight:

the composition of this example was selected from the polyester aliphatic urethane acrylate used in example 1 except that the urethane acrylate resin was used in a reduced amount.

The preparation method of the UV-cured matte white finish specifically comprises the following steps:

s1, weighing polyurethane acrylate resin according to parts by weight, putting the polyurethane acrylate resin into a reaction kettle, then sequentially weighing a wetting agent, a defoaming agent and an anti-settling auxiliary agent under the condition that the stirring speed is 600-800rpm, adding the weighed wetting agent, the defoaming agent and the anti-settling auxiliary agent into the reaction kettle, and dispersing for 8-10 min;

s2, weighing titanium dioxide, slowly putting the titanium dioxide into the reaction kettle, increasing the rotating speed to 1000-1200rpm, and dispersing for 20-25 min;

s3, then reducing the stirring speed of the reaction kettle to 400-600rpm, continuously adding the cellulose acetate butyrate liquid, the flatting agent, the photoinitiator, the 1-6 hexanediol diacrylate and the hydroxyethyl methacrylate into the reaction kettle, and dispersing for 8-10 min;

s4, weighing the matte powder, slowly putting the matte powder into the reaction kettle, and then increasing the rotating speed to 1000-1200rpm for dispersing for 10-15 min;

s5, finally, reducing the stirring speed of the reaction kettle to 400-600rpm, adding an organic solvent into the reaction kettle, dispersing for 8-10min to form a paint liquid D2, and storing for later use.

The viscosity of paint liquid product D2 was tested to be 55S (run time for No. 2 cup in rockfield).

According to the UV-cured matte white finish paint provided by the embodiment, the matte white finish paint is suitable for a mechanical arm spraying process, the mechanical arm spraying process can be used for spraying the matte white finish paint on six processing surfaces of a product at one time, the construction difficulty of the matte white surface is greatly simplified, the construction efficiency is convenient to improve, the whole construction process has small dependence on manpower, the introduction of human errors is reduced, and the obtained paint film has high flatness, small smell and environmental protection.

Example 3

The UV-cured matte white finish paint convenient for spraying of mechanical arms comprises the following components in parts by weight:

compared with the example 1, the polyurethane acrylate resin of the embodiment adopts polyester type aliphatic polyurethane acrylate, and the dosage of the polyester type aliphatic polyurethane acrylate is increased; the active diluent directly selects 1-6 hexanediol diacrylate (HDDA) and hydroxyethyl methacrylate (HEMA), but the consumption of the 1-6 hexanediol diacrylate (HDDA) is reduced, because the dilution ratio during construction is improved, and the spraying effect of the finish paint is improved. The same components as in example 1 were used.

The preparation method of the UV-cured matte white finish specifically comprises the following steps:

s1, weighing polyurethane acrylate resin according to parts by weight, putting the polyurethane acrylate resin into a reaction kettle, then sequentially weighing a wetting agent, a defoaming agent and an anti-settling auxiliary agent under the condition that the stirring speed is 600-800rpm, adding the weighed wetting agent, the defoaming agent and the anti-settling auxiliary agent into the reaction kettle, and dispersing for 8-10 min;

s2, weighing titanium dioxide, slowly putting the titanium dioxide into the reaction kettle, increasing the rotating speed to 1000-1200rpm, and dispersing for 20-25 min;

s3, then reducing the stirring speed of the reaction kettle to 400-600rpm, continuously adding the cellulose acetate butyrate liquid, the flatting agent, the photoinitiator, the 1-6 hexanediol diacrylate and the hydroxyethyl methacrylate into the reaction kettle, and dispersing for 8-10 min;

s4, weighing the matte powder, slowly putting the matte powder into the reaction kettle, and then increasing the rotating speed to 1000-1200rpm for dispersing for 10-15 min;

s5, finally, reducing the stirring speed of the reaction kettle to 400-600rpm, adding an organic solvent into the reaction kettle, dispersing for 8-10min to form a paint liquid D3, and storing for later use.

According to the UV-cured matte white finish paint provided by the embodiment, the matte white finish paint is suitable for a mechanical arm spraying process, the mechanical arm spraying process can be used for spraying the matte white finish paint on six processing surfaces of a product at one time, the construction difficulty of the matte white surface is greatly simplified, the construction efficiency is convenient to improve, the whole construction process has small dependence on manpower, the introduction of human errors is reduced, and the obtained paint film has high flatness, small smell and environmental protection.

Example 4

The UV-cured matte white finish paint convenient for spraying of mechanical arms comprises the following components in parts by weight:

compared with the example 1, the polyurethane acrylate resin of the embodiment adopts polyester type aliphatic polyurethane acrylate, and the dosage of the polyester type aliphatic polyurethane acrylate is reduced; the active diluent directly selects 1-6 hexanediol diacrylate (HDDA) and hydroxyethyl methacrylate (HEMA), and the dosage is increased because the dilution ratio in construction is increased, thereby achieving the purpose of improving the spraying effect of the finish paint. The same components as those in example 1 were used in different amounts.

The UV-curable matte white finish of this example was prepared in the same manner as example 1 to obtain paint solution D4, and was stored for further use.

Example 5

The UV-cured matte white finish paint convenient for spraying of mechanical arms comprises the following components in parts by weight:

the polyurethane acrylate resin of the embodiment selects polyester type aliphatic polyurethane acrylate as a main film forming substance, has large polarity and large molecular weight, and simultaneously has wetting and leveling properties, and can prevent sagging and level. The consumption of 1-6 hexanediol diacrylate (HDDA) serving as an active diluent is reduced, because the dilution ratio during construction is increased, and the spraying effect of the finish paint is improved.

The wetting agent is selected from organosilicon modified wetting agent, such as polyether modified polydimethylsiloxane, and BYK-306. The defoaming agent is an organic silicon modified defoaming agent, such as BYK-141 defoaming agent. The anti-settling auxiliary agent is polyamide wax anti-settling agent, and specifically can be Disbamon 6900-20X anti-settling agent. The leveling agent is aralkyl modified polymethyl alkyl siloxane, and can be Huaxia HX-3130 leveling agent. The titanium dioxide is rutile R-900. The photoinitiator is used for initiating the polymerization, crosslinking and curing of the monomer under the condition of illumination, and particularly 2-hydroxy-2-methyl-1-phenyl-1-acetone (enduring 1104/184) and bis (2,4, 6-trimethylbenzoyl) phenylphosphine oxide (enduring 1109/819) are used. The matte powder adopts UV70C from Haimines. The mass concentration of the cellulose acetate butyrate solution is 30 wt%. The organic solvent is butyl acetate.

The UV-curable matte white finish of this example was prepared in the same manner as example 1 to obtain paint solution D5, and was stored for further use.

Example 6

The UV-cured matte white finish paint convenient for spraying of mechanical arms comprises the following components in parts by weight:

the components used in this example were selected as in example 5.

The UV-curable matte white finish of this example was prepared in the same manner as example 1 to obtain paint solution D6, and was stored for further use.

Example 7

The UV-cured matte white finish paint convenient for spraying of mechanical arms comprises the following components in parts by weight:

the polyurethane acrylate resin of the embodiment selects polyester type aliphatic polyurethane acrylate which is used as a main film forming substance, has large polarity and molecular weight, has wetting and leveling properties, can prevent sagging and level, and has the same amount as that of the polyurethane acrylate resin of the embodiment 6. The dosage of the active diluent 1-6 hexanediol diacrylate (HDDA) is reduced compared with that of the example 6, because the dilution ratio during construction is increased, and the spraying effect of the finish paint is improved. The wetting agent is selected from organosilicon modified wetting agent, such as polyether modified polydimethylsiloxane, and BYK-306. The defoaming agent is an organic silicon modified defoaming agent, such as BYK-141 defoaming agent. The anti-settling auxiliary agent is polyamide wax anti-settling agent, and specifically can be Disbamon 6900-20X anti-settling agent. The leveling agent is aralkyl modified polymethyl alkyl siloxane, and can be Huaxia HX-3130 leveling agent. The titanium dioxide is rutile R-900. The photoinitiator is used for initiating the polymerization, crosslinking and curing of the monomer under the condition of illumination, and particularly 2-hydroxy-2-methyl-1-phenyl-1-acetone (enduring 1104/184) and bis (2,4, 6-trimethylbenzoyl) phenylphosphine oxide (enduring 1109/819) are used. The matte powder adopts UV70C from Haimines. The mass concentration of the cellulose acetate butyrate solution is 30 wt%, and the dosage is increased to 12 parts. The organic solvent is butyl acetate.

The UV-curable matte white finish of this example was prepared in the same manner as example 1 to obtain paint solution D7, and was stored for further use.

Example 8

The UV-cured matte white finish paint convenient for spraying of mechanical arms comprises the following components in parts by weight:

the selection of the components in the embodiment is similar to that in the embodiment 6, and the consumption of the 1-6 hexanediol diacrylate (HDDA) serving as the active diluent is reduced, because the dilution ratio in construction is increased, and the spraying effect of the finish paint is improved.

The anti-settling auxiliary agent is polyamide wax anti-settling agent, specifically Tesbarone 6900-20X anti-settling agent, and the dosage is reduced. The mass concentration of the cellulose acetate butyrate solution is 30 wt%, and the dosage is increased.

The UV-curable matte white finish of this example was prepared in the same manner as example 1 to obtain paint solution D8, and was stored for further use.

The paint liquid products D1-D8 prepared in examples 1-8 are subjected to viscosity tests respectively, then the paint liquid products are diluted to 13 seconds respectively by a diluent (butyl acetate: ethyl acetate: 1) and prepared into paint film products by a spraying process, and the construction thickness is 125g/m²(ii) a And respectively carrying out adhesion test, glossiness test, hardness test and fineness test on each paint film product so as to evaluate the comprehensive performance of the paint liquid products D1-D8, wherein the specific detection results are shown in Table 1.

TABLE 1 results of basic Performance test of paint liquid products D1-D8

Wherein, the viscosity of the paint liquid is measured and directly measured by the flowing time of a No. 2 cup in a rock field; the adhesion was tested according to GB/T9286-1998; the gloss of the paint film is tested according to GB/T9754-2007; the hardness of the paint film is tested according to GB/T6739-2006; paint film fineness was tested according to GB/T6753.1-2007.

As can be seen from Table 1, the viscosity of the paint liquid products D1-D8 after dilution in the paint liquid products prepared in examples 1-8 can meet the requirements of the mechanical arm spraying process, and after the paint liquid products D1-D8 are respectively prepared into paint films, the paint film products have good adhesive force and hardness, the glossiness of the paint films can reach 25-60, and the fineness of the paint films is lower than 15 μm. This means that the paint films prepared from the matte white top-coat paint liquid products provided in examples 1 to 8 have the advantages of good hardness, strong adhesion and good control of glossiness, and can meet the market requirements.

Further, the paint liquid products D5-D8 provided in examples 5-8 have paint film gloss of 25-35 degrees, and the gloss is closer to the actual market demand throughAnd selecting the paint liquid products D5-D8 to perform a comparative test of sagging prevention and leveling: the paint liquid products D5-D8 prepared in examples 5-8 were diluted with a diluent (butyl acetate: ethyl acetate ═ 1:1) for 13 seconds, respectively, and then spray-coated to a thickness of 90-150g/m²The rear vertical face is placed to observe the sagging condition, and the spraying construction thickness is 70-110g/m²The leveling condition was observed by the rear plane placement, and the specific results are shown in tables 2 and 3.

TABLE 2 comparison of sagging conditions for paint liquid products D5-D8

Test index	D5	D6	D7	D8
					90g/m2	5	5	5	5
100g/m2	5	5	5	5
					110g/m2	4	5	5	5
120g/m2	3	4	5	5
					130g/m2	2	3	4	5
140g/m2	0	2	4	4
					150g/m2	0	0	2	3

Note: the score is 0-5, and the higher the score, the better the anti-sagging performance is.

TABLE 3 comparison of leveling of paint liquid products D5-D8

Test index	D5	D6	D7	D8
					70g/m2	2	2	3	3
80g/m2	3	3	4	4
					90g/m2	4	4	5	5
100g/m2	5	5	5	5
					110g/m2	5	5	5	5

Note: the score is 0-5, and the higher the score is, the better the leveling performance is.

From tables 2 and 3, it can be seen that D7 and D8 showed better sag and leveling, but D8 showed a higher open-dilution ratio and a higher VOC emission, and thus example 7 was the best example.

The foregoing is merely exemplary and illustrative of the structures of the present invention, which are described in some detail and detail, and are not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.