阅读说明：本技术 一种具有肌肤触感的溶剂型聚氨酯面漆及其制备方法 (Solvent type polyurethane finish paint with skin touch feeling and preparation method thereof ) 是由 周卫平 于 2020-12-28 设计创作，主要内容包括：本发明涉及涂料技术领域,具体涉及一种具有肌肤触感的溶剂型聚氨酯面漆及其制备方法,该聚氨酯面漆包括质量比为5:1的A组分和B组分以及适量C组分,其中,A组分由45～55份改性羟基丙烯酸哑光树脂、20～30份球型低密度聚乙烯微粉、1～3份分散剂、0.5～1份流平剂、13～23份醋酸丁酯以及5～8份丙二醇甲醚乙酸酯组成；B组分由50～60份HDI三聚体、10～20份脱水醋酸丁酯以及20～30份脱水醋酸乙酯组成；C组分为稀释剂。将质量比为5:1的A组分和B组分以及适量C组分混合均匀后,使用喷枪或自动喷涂机喷涂在家具表面,常温下干燥12小时即可得到光泽度低、具有肌肤触感的漆膜。(The invention relates to the technical field of coatings, in particular to a solvent type polyurethane finish with skin touch and a preparation method thereof, wherein the polyurethane finish comprises a component A, a component B and a proper amount of a component C in a mass ratio of 5:1, wherein the component A comprises 45-55 parts of modified hydroxy acrylic acid matte resin, 20-30 parts of spherical low-density polyethylene micropowder, 1-3 parts of dispersing agent, 0.5-1 part of flatting agent, 13-23 parts of butyl acetate and 5-8 parts of propylene glycol methyl ether acetate; the component B consists of 50-60 parts of HDI tripolymer, 10-20 parts of dehydrated butyl acetate and 20-30 parts of dehydrated ethyl acetate; the component C is a diluent. Uniformly mixing the component A, the component B and a proper amount of the component C in a mass ratio of 5:1, spraying the mixture on the surface of furniture by using a spray gun or an automatic spraying machine, and drying the mixture for 12 hours at normal temperature to obtain a paint film with low glossiness and skin touch.)

1. A solvent type polyurethane finish paint with skin touch is characterized in that: the paint comprises a component A, a component B and a component C, wherein the weight ratio of the component A to the component B is 5:1, and a proper amount of the component C is used;

the component A consists of the following raw materials in parts by weight:

the component B comprises the following raw materials in parts by weight:

50-60 parts of HDI trimer

10-20 parts of dehydrated butyl acetate

20-30 parts of dehydrated ethyl acetate;

the component C is a diluent.

2. The solvent-borne polyurethane finish with a skin feel according to claim 1, characterized in that: the component C is prepared by mixing 20-30 parts of butyl acetate, 10-20 parts of ethyl acetate, 20-30 parts of methyl isobutyl ketone and 10-20 parts of propylene glycol methyl ether propionate.

3. The solvent-borne polyurethane finish with a skin feel according to claim 1, characterized in that: the modified hydroxy acrylic acid matte resin has a solid content of 65-75% and a hydroxyl value of 50-60 mgKOH/g.

4. The solvent-borne polyurethane finish with a skin feel according to claim 1, characterized in that: the particle size of the spherical low-density polyethylene micro powder is 6-8 mu m.

5. The solvent-borne polyurethane finish with a skin feel according to claim 1, characterized in that: the dispersing agent is a polyester dispersing agent, and the leveling agent is a silicon-fluorine leveling agent.

6. The solvent-borne polyurethane finish with a skin feel according to claim 1, characterized in that: the HDI tripolymer has an NCO value of 20-25% and a solid content of 100%.

7. The method for producing a solvent-type polyurethane topcoat with skin feel according to any one of claims 1 to 6, characterized in that: comprises the following steps which are executed in sequence:

first step, preparation of component A

Step one, mixing and stirring uniformly modified hydroxy acrylic acid matt resin, a dispersing agent and part of butyl acetate according to the formula ratio to obtain a first mixture;

step two, adding the spherical low-density polyethylene micro powder with the formula amount into the first mixture obtained in the step one, and uniformly stirring to obtain a second mixture;

step three, adding the flatting agent, propylene glycol methyl ether acetate and the residual butyl acetate in the formula amount into the second mixture obtained in the step two, and uniformly stirring to obtain a component A for later use;

second step, preparation of component B

Uniformly mixing the dehydrated ethyl acetate, the dehydrated butyl acetate and the HDI tripolymer according to the formula ratio to obtain a component B for later use;

third step, mixing

And (3) uniformly mixing the component A prepared in the first step and the component B prepared in the second step according to the weight ratio of 5:1, and adding the component C to adjust the viscosity, so as to obtain the solvent type polyurethane finish paint with skin touch.

8. The method for preparing a solvent-based polyurethane topcoat with skin feel according to claim 7, wherein: in the first step, the stirring speed is 700-900 revolutions per minute, and the stirring time is 8-12 minutes;

in the third step, the stirring speed is 700-900 revolutions per minute, and the stirring time is 18-22 minutes.

9. The method for preparing a solvent-based polyurethane topcoat with skin feel according to claim 7, wherein: in the second step, the stirring speed is 900-1100 r/min, and the stirring time is 25-35 min.

10. The method for preparing a solvent-based polyurethane topcoat with skin feel according to claim 7, wherein: the weight ratio of part of butyl acetate in the first step to the rest of butyl acetate in the third step is (5-8): (8-15).

Technical Field

The invention relates to the technical field of coatings, in particular to a solvent type polyurethane finish with skin touch and a preparation method thereof.

Background

In recent years, as the aesthetic taste of consumers is further improved with the improvement of living standard, more and more consumers are demanding the painting effect of furniture to have a skin touch feeling, thereby highlighting harmony between people and furniture. However, the furniture coated with the polyurethane paint on the market has the defects of cold and hard appearance, high glossiness higher than 5 percent and difficult extinction, because polyurethane film forming is a complicated physical and chemical reaction process, and the surface film forming effect is difficult to control by using matte powder extinction.

Disclosure of Invention

The invention aims to provide a solvent type polyurethane finish paint with skin touch, which has the advantages of extremely low glossiness and smooth paint film similar to skin touch in view of the defects of the prior art.

The second purpose of the invention is to provide a preparation method of the solvent type polyurethane finish paint with skin touch, aiming at the defects of the prior art, and the preparation method has the advantages of simple process and low cost.

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

the solvent type polyurethane finish paint with skin touch comprises a component A, a component B and a component C, wherein the weight ratio of the component A to the component B is 5:1, and a proper amount of the component C is provided;

the component A consists of the following raw materials in parts by weight:

the component B comprises the following raw materials in parts by weight:

50-60 parts of HDI trimer

10-20 parts of dehydrated butyl acetate

20-30 parts of dehydrated ethyl acetate;

the component C is a diluent.

In the technical scheme, the component C comprises the following raw materials in parts by weight: 20-30 parts of butyl acetate, 10-20 parts of ethyl acetate, 20-30 parts of methyl isobutyl ketone and 10-20 parts of propylene glycol methyl ether propionate.

In the technical scheme, the solid content of the modified hydroxy acrylic acid matte resin is 65-75%, and the hydroxyl value is 50-60 mgKOH/g.

In the technical scheme, the particle size of the spherical low-density polyethylene micro powder is 6-8 μm.

In the technical scheme, the dispersing agent is a polyester dispersing agent, and the leveling agent is a silicon-fluorine leveling agent.

In the technical scheme, the NCO value of the HDI tripolymer is 20-25%, and the solid content is 100%.

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

the preparation method of the solvent type polyurethane finishing coat with skin touch is provided, and comprises the following steps which are sequentially executed:

first step, preparation of component A

Step one, mixing and stirring uniformly modified hydroxy acrylic acid matt resin, a dispersing agent and part of butyl acetate according to the formula ratio to obtain a first mixture;

step two, adding the spherical low-density polyethylene micro powder with the formula amount into the first mixture obtained in the step one, and uniformly stirring to obtain a second mixture;

step three, adding the flatting agent, propylene glycol methyl ether acetate and the residual butyl acetate in the formula amount into the second mixture obtained in the step two, and uniformly stirring to obtain a component A for later use;

second step, preparation of component B

Uniformly mixing the dehydrated ethyl acetate, the dehydrated butyl acetate and the HDI tripolymer according to the formula ratio to obtain a component B for later use;

third step, mixing

And (3) uniformly mixing the component A prepared in the first step and the component B prepared in the second step according to the weight ratio of 5:1, and adding the component C to adjust the viscosity, so as to obtain the solvent type polyurethane finish paint with skin touch.

In the technical scheme, in the first step, the stirring speed is 700-900 rpm, and the stirring time is 8-12 minutes.

In the technical scheme, in the second step, the stirring speed is 900-1100 r/min, and the stirring time is 25-35 min.

In the technical scheme, in the third step, the stirring speed is 700-900 revolutions per minute, and the stirring time is 18-22 minutes.

In the technical scheme, the weight ratio of the part of butyl acetate in the first step to the rest of butyl acetate in the third step is (5-8): (8-15).

The invention has the beneficial effects that:

1. the solvent type polyurethane finish paint with skin touch comprises a component A, a component B and a proper amount of a component C in a mass ratio of 5:1, wherein the component A comprises 45-55 parts of modified hydroxy acrylic matt resin, 20-30 parts of spherical low-density polyethylene micro powder, 1-3 parts of a dispersing agent, 0.5-1 part of a leveling agent, 13-23 parts of butyl acetate and 5-8 parts of propylene glycol methyl ether acetate; the component B consists of 50-60 parts of HDI tripolymer, 10-20 parts of dehydrated butyl acetate and 20-30 parts of dehydrated ethyl acetate; the component C is a diluent. The polyurethane finish paint has the following technical effects:

(1) the modified hydroxy acrylic acid matt resin is formed by mixing and melting hydroxy acrylic acid resin and polypropylene wax, and the polypropylene wax has an extinction effect in a solvent type coating film, so that the modified hydroxy acrylic acid matt resin is endowed with a self-extinction performance, the modified hydroxy acrylic acid matt resin is used in a polyurethane finish paint and sprayed on the surface of furniture, and the glossiness of the paint film is less than 5%.

(2) The spherical low-density polyethylene micro powder has the extinction effect, so that the glossiness of a paint film can be further reduced; the low-density characteristic of the paint enables the weight of the polyethylene micropowder to be lighter, the polyethylene micropowder is distributed on the surface of a paint film in the film forming process, and the spherical structure is combined to endow the paint film with the characteristics of smoothness and fineness.

(3) The HDI tripolymer provides an isocyanate group which reacts with a hydroxyl group in the modified hydroxy acrylic acid matt resin of the component A, and a dehydration solvent is used to ensure that the isocyanate group can completely react with the hydroxyl group in the modified hydroxy acrylic acid matt resin, so that the interference of the hydroxyl group in water is avoided, and the stability of a paint film is further influenced.

(4) The leveling agent is beneficial to reducing the surface tension of the finish paint, and improving the wettability and the anti-pollution performance of a paint film, thereby providing a flat, uniform and smooth paint film.

2. The solvent type polyurethane finish paint with skin touch is prepared by uniformly mixing the component A, the component B and the component C in a mass ratio of 5:1, spraying the mixture on the surface of furniture by using a spray gun or an automatic spraying machine, and drying the mixture for more than 12 hours at normal temperature to obtain a paint film with low glossiness and skin touch.

3. The preparation method of the solvent type polyurethane finish paint with skin touch has the characteristics of simple production process and low cost.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1

A solvent type polyurethane finish paint with skin touch comprises a component A, a component B and a component C, wherein the weight ratio of the component A to the component B is 5:1, and a proper amount of the component C is used;

the component A consists of the following raw materials in parts by weight:

the component B comprises the following raw materials in parts by weight:

55 parts of HDI trimer

Dehydrated butyl acetate 15 parts

25 parts of dehydrated ethyl acetate;

the component C comprises 25 parts of butyl acetate, 15 parts of ethyl acetate, 25 parts of methyl isobutyl ketone and 15 parts of propylene glycol methyl ether propionate.

In this example, the solid content of the modified hydroxy acrylic matte resin is 70%, and the hydroxyl value is 55 mgKOH/g.

In the embodiment, the particle size of the spherical low-density polyethylene micropowder is 7 μm, and if the particle size is too small, the extinction performance of the spherical structure and the smooth and fine skin touch feeling of the spherical structure cannot be exerted, and if the particle size is too large, the surface of a paint film is too rough, and the smooth and fine skin touch feeling cannot be obtained.

In the technical scheme, the NCO value of the HDI tripolymer is 23%, and the solid content is 100%.

The preparation method of the solvent type polyurethane finish paint with skin touch comprises the following steps of sequentially executing:

first step, preparation of component A

Step one, mixing and stirring uniformly modified hydroxy acrylic acid matt resin, a dispersing agent and part of butyl acetate according to the formula ratio at the stirring speed of 800 revolutions per minute for 10 minutes to obtain a first mixture;

step two, adding the spherical low-density polyethylene micro powder with the formula amount into the first mixture obtained in the step one, and uniformly stirring the mixture at the stirring speed of 1000 revolutions per minute for 30 minutes to obtain a second mixture;

step three, adding the flatting agent, the propylene glycol methyl ether acetate and the residual butyl acetate in the formula amount into the second mixture obtained in the step two, and uniformly stirring at the stirring speed of 800 revolutions per minute for 20 minutes to obtain a component A for later use;

second step, preparation of component B

Uniformly mixing the dehydrated ethyl acetate, the dehydrated butyl acetate and the HDI tripolymer according to the formula ratio to obtain a component B for later use;

third step, mixing

And (3) uniformly mixing the component A prepared in the first step and the component B prepared in the second step according to the weight ratio of 5:1, and adding the component C to adjust the viscosity, so as to obtain the solvent type polyurethane finish paint with skin touch.

In this embodiment, the weight ratio of the part of butyl acetate in the first step to the remaining butyl acetate in the third step is 7: 12.

example 2

A solvent type polyurethane finish paint with skin touch comprises a component A, a component B and a component C, wherein the weight ratio of the component A to the component B is 5:1, and a proper amount of the component C is used;

the component A consists of the following raw materials in parts by weight:

the component B comprises the following raw materials in parts by weight:

50 parts of HDI trimer

10 portions of dehydrated butyl acetate

20 parts of dehydrated ethyl acetate;

the component C comprises 20 parts of butyl acetate, 10 parts of ethyl acetate, 20 parts of methyl isobutyl ketone and 10 parts of propylene glycol methyl ether propionate.

In this example, the modified hydroxy acrylic matte resin has a solid content of 65% and a hydroxyl value of 50 mgKOH/g.

In the embodiment, the particle size of the spherical low-density polyethylene micropowder is 6 μm, and if the particle size is too small, the extinction performance of the spherical structure and the smooth and fine skin touch feeling of the spherical structure cannot be exerted, and if the particle size is too large, the surface of a paint film is too rough, and the smooth and fine skin touch feeling cannot be obtained.

In the technical scheme, the NCO value of the HDI tripolymer is 20%, and the solid content is 100%.

The preparation method of the solvent type polyurethane finish paint with skin touch comprises the following steps of sequentially executing:

first step, preparation of component A

Step one, mixing and stirring uniformly modified hydroxy acrylic acid matt resin, a dispersing agent and part of butyl acetate according to the formula ratio at the stirring speed of 700 revolutions per minute for 12 minutes to obtain a first mixture;

step two, adding the spherical low-density polyethylene micro powder with the formula amount into the first mixture obtained in the step one, and uniformly stirring at the stirring speed of 900 revolutions per minute for 35 minutes to obtain a second mixture;

step three, adding the flatting agent, the propylene glycol methyl ether acetate and the residual butyl acetate in the formula amount into the second mixture obtained in the step two, and uniformly stirring at the stirring speed of 700 revolutions per minute for 22 minutes to obtain a component A for later use;

second step, preparation of component B

Uniformly mixing the dehydrated ethyl acetate, the dehydrated butyl acetate and the HDI tripolymer according to the formula ratio to obtain a component B for later use;

third step, mixing

And (3) uniformly mixing the component A prepared in the first step and the component B prepared in the second step according to the weight ratio of 5:1, and adding the component C to adjust the viscosity, so as to obtain the solvent type polyurethane finish paint with skin touch.

In this embodiment, the weight ratio of the part of butyl acetate in the first step to the remaining butyl acetate in the third step is 5: 15.

example 3

A solvent type polyurethane finish paint with skin touch comprises a component A, a component B and a component C, wherein the weight ratio of the component A to the component B is 5:1, and a proper amount of the component C is used;

the component A consists of the following raw materials in parts by weight:

the component B comprises the following raw materials in parts by weight:

HDI trimer 60 parts

20 portions of dehydrated butyl acetate

30 parts of dehydrated ethyl acetate;

the component C comprises 30 parts of butyl acetate, 20 parts of ethyl acetate, 30 parts of methyl isobutyl ketone and 20 parts of propylene glycol methyl ether propionate.

In this example, the modified hydroxy acrylic matte resin has a solid content of 75% and a hydroxyl value of 60 mgKOH/g.

In the embodiment, the particle size of the spherical low-density polyethylene micropowder is 8 μm, and if the particle size is too small, the extinction performance of the spherical structure and the smooth and fine skin touch feeling of the spherical structure cannot be exerted, and if the particle size is too large, the surface of a paint film is too rough, and the smooth and fine skin touch feeling cannot be obtained.

In the technical scheme, the NCO value of the HDI tripolymer is 25%, and the solid content is 100%.

The preparation method of the solvent type polyurethane finish paint with skin touch comprises the following steps of sequentially executing:

first step, preparation of component A

Step one, mixing and stirring uniformly modified hydroxy acrylic acid matt resin, a dispersing agent and part of butyl acetate according to the formula ratio at the stirring speed of 900 revolutions per minute for 8 minutes to obtain a first mixture;

step two, adding the spherical low-density polyethylene micro powder with the formula amount into the first mixture obtained in the step one, and uniformly stirring at the stirring speed of 1100 r/min for 25 min to obtain a second mixture;

step three, adding the flatting agent, the propylene glycol methyl ether acetate and the residual butyl acetate in the formula amount into the second mixture obtained in the step two, and uniformly stirring at the stirring speed of 900 revolutions per minute for 18 minutes to obtain a component A for later use;

second step, preparation of component B

Uniformly mixing the dehydrated ethyl acetate, the dehydrated butyl acetate and the HDI tripolymer according to the formula ratio to obtain a component B for later use;

third step, mixing

And (3) uniformly mixing the component A prepared in the first step and the component B prepared in the second step according to the weight ratio of 5:1, and adding the component C to adjust the viscosity, so as to obtain the solvent type polyurethane finish paint with skin touch.

In this embodiment, the weight ratio of the part of butyl acetate in the first step to the remaining butyl acetate in the third step is 8: 10.

comparative example 1

The modified hydroxy acrylic matt resin in the component A is replaced by hydroxy acrylic resin, and other implementation conditions are the same as those in the embodiment 1.

Comparative example 2

The component A does not contain spherical low-density polyethylene micropowder, and other implementation conditions are the same as those of the component A in the example 1.

Comparative example 3

The spherical low-density polyethylene micropowder in the component A is replaced by polyethylene micropowder, and other implementation conditions are the same as those in the example 1.

The results of the performance tests of the polyurethane topcoats of examples 1-3 applied to the furniture surface are shown in Table 1, and the results of the performance tests of the polyurethane topcoats of comparative examples 1-3 applied to the furniture surface are shown in Table 2.

TABLE 1

TABLE 2

As shown by comparison of the test results of the example 1 in the table 1 and the comparative example 1 in the table 2, the modified hydroxy acrylic matt resin in the example 1 is formed by mixing and melting hydroxy acrylic resin (the comparative example 1) and polypropylene wax, the polypropylene wax has an extinction effect in a solvent-based coating film, so that the modified hydroxy acrylic matt resin is endowed with self-extinction performance, and when the modified hydroxy acrylic matt resin is used in a polyurethane finish paint and sprayed on the surface of furniture, the glossiness of a paint film is only 2%; the hydroxyl acrylic resin of comparative example 1 has the characteristic of high gloss, which is up to 70%, and does not meet the requirement of low gloss.

As shown by comparison of test results of the example 1 in the table 1 and the comparative examples 2 and 3 in the table 2, the spherical low-density polyethylene micropowder in the example 1 has a delustering effect, so that the glossiness of a paint film can be further reduced, the low-density characteristic of the spherical low-density polyethylene micropowder enables the weight of the polyethylene micropowder to be lighter and to be distributed on the surface of the paint film in a film forming process, the spherical low-density polyethylene micropowder is combined with the characteristic that a spherical structure endows the paint film with smoothness and fineness, and the spherical low-density polyethylene micropowder is added into a polyurethane finish paint and sprayed on the surface of furniture, so that the delustering is assisted, and a paint film with skin touch is provided; comparative example 2 contains no spherical low-density polyethylene micropowder, and correspondingly, the paint film is rough and has higher glossiness of 10 percent; although the comparative example 3 contains polyethylene micro powder, the extinction can be assisted (the glossiness is 7 percent and is lower than that of the comparative example 2), because the polyethylene micro powder does not have the characteristic of low density, the extinction effect is influenced by partial polyethylene micro powder sinking, and the polyethylene micro powder has no spherical structure, cannot obtain smooth and fine hand feeling, and has a rough paint film surface.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.