CN117701128A - Coating agent and preparation method thereof - Google Patents

Abstract

The invention relates to the technical field of finishing agents, in particular to a finishing agent and a preparation method thereof. The invention provides a finishing agent, which comprises a substrate and a bactericide which are independently packaged; the matrix comprises the following components in parts by mass: deionized water: 55-65 parts; 0.2 to 0.5 part of dispersing agent; extinction powder: 3-6 parts; defoaming agent: 0.5 to 1 part; aqueous polyurethane dispersion: 15-25 parts; leveling agent: 1-2 parts; silicone dispersion: 3-5 parts; pH regulator: 0.5 to 1.5 parts; and (3) a thickening agent: 2-6 parts; polyether modified organosilicon wetting agent: 4-6 parts; the mass ratio of the bactericide to the deionized water is 0.1-0.3:55-65. The invention adopts deionized water to replace organic solvent, reduces peculiar smell, simultaneously adds bactericide, and limits the components and the dosage of the bactericide, so that the finishing agent has good antibacterial property.

Description

A kind of coating agent and its preparation method

Technical field

The present invention relates to the technical field of coating agents, and in particular to a coating agent and a preparation method thereof.

Background technique

Finishing agent is a general term for a class of leather additives used to protect and beautify the leather surface. It is prepared from film-forming agents, colorants, finishing additives and media in a certain proportion. Finishing agents can not only make the leather surface resistant to oil stains and sweat stains, but also protect the leather grain to beautify the leather surface. However, the coating agents currently used on the market have the disadvantages of having a strong odor and not having antibacterial properties.

Contents of the invention

In view of this, the object of the present invention is to provide a coating agent and a preparation method thereof. The coating agent provided by the invention has good antibacterial properties and no peculiar smell.

In order to achieve the above objects, the present invention provides the following technical solutions:

The invention provides a coating agent, which includes an independently packaged base and a bactericide; the base includes the following components by mass:

Deionized water: 55 to 65 parts; dispersant 0.2 to 0.5 parts; matting powder: 3 to 6 parts; defoaming agent: 0.5 to 1 part; water-based polyurethane dispersion: 15 to 25 parts; leveling agent: 1 to 2 parts; silicone dispersion: 3 to 5 parts; pH adjuster: 0.5 to 1.5 parts; thickener: 2 to 6 parts; polyether modified silicone wetting agent: 4 to 6 parts;

The mass ratio of the bactericide and deionized water is 0.1~0.3:55~65; the bactericide is a mixture of bactericide TNB~5 and bactericide CHR 0107; the bactericide TNB~5 and bactericide CHR 0107 The mass ratio is 1:1.

Preferably, the matting powder includes amorphous silica; the dispersant is a polycarboxylic anionic surfactant.

Preferably, the defoaming agent includes polyether-modified silicon defoaming agent; the polyether-modified silicon defoaming agent includes TSA~630 and/or 62B.

Preferably, the pH adjuster includes aminomethyl propanol.

Preferably, the polycarboxylic acid anionic surfactant includes polycarboxylic acid anionic surfactant 5040 and/or polycarboxylic acid anionic surfactant CFC6530.

Preferably, the polyether-modified silicone wetting agent includes polyether-modified silicone wetting agent Wink061 and/or DCA~1044.

Preferably, the thickening agent includes polymethacrylic acid emulsion.

The present invention also provides a preparation method of the above-mentioned coating agent, which includes the following steps:

Mix deionized water, dispersant, matting powder, defoaming agent, water-based polyurethane dispersion, leveling agent, silicone dispersion, pH regulator, thickener and polyether modified silicone wetting agent to obtain matrix;

The base and the bactericide are packaged independently to obtain the coating agent.

Preferably, the mixture is:

The deionized water is first mixed with the dispersant, matting powder, and defoaming agent in sequence to obtain a first mixed liquid;

The first mixed liquid is sequentially mixed with an aqueous polyurethane dispersion, a leveling agent and a silicone dispersion for a second time to obtain a second mixed liquid;

The second mixed liquid is sequentially mixed with a pH adjuster and a thickener for a third time to obtain a third mixed liquid;

The third mixed liquid and the polyether-modified silicone wetting agent are mixed for the fourth time to obtain the matrix.

Preferably, the rotation speed of the first mixing is 800-1000r/min; the time is 0.5-1h;

The second mixing speed is 500-600r/min; the time is 10-20min;

The third mixing speed is 1000-1200r/min; the time is 20-30min;

The fourth mixing speed is 800-1000r/min; the time is 0.5-1h.

The invention provides a coating agent, which includes an independently packaged base and a bactericide; the base has the following components by mass: deionized water: 55 to 65 parts; dispersant: 0.2 to 0.5 parts; matting powder: 3 to 6 parts parts; defoaming agent: 0.5 to 1 part; water-based polyurethane dispersion: 15 to 25 parts; leveling agent: 1 to 2 parts; silicone dispersion: 3 to 5 parts; pH adjuster: 0.5 to 1.5 parts; Thickener: 2 to 6 parts; polyether modified silicone wetting agent: 4 to 6 parts; the mass ratio of the bactericide and deionized water is 0.1 to 0.3:55 to 65; the bactericide is bactericidal A mixture of agent TNB~5 and bactericide CHR 0107; the mass ratio of the bactericide TNB~5 and bactericide CHR 0107 is 1:1. The present invention uses deionized water instead of organic solvents to reduce odor. At the same time, a bactericide is added and the components and dosage of the bactericide are limited, so that the coating agent has good antibacterial properties.

Detailed ways

The invention provides a coating agent, which includes an independently packaged base and a bactericide; the base has the following components by mass:

Deionized water: 55 to 65 parts; dispersant 0.2 to 0.5 parts; matting powder: 3 to 6 parts; defoaming agent: 0.5 to 1 part; water-based polyurethane dispersion: 15 to 25 parts; leveling agent: 1 to 2 parts; silicone dispersion: 3 to 5 parts; pH adjuster: 0.5 to 1.5 parts; thickener: 2 to 6 parts; polyether modified silicone wetting agent: 4 to 6 parts;

The mass ratio of the bactericide and deionized water is 0.1~0.3:55~65; the bactericide is a mixture of bactericide TNB~5 and bactericide CHR 0107; the bactericide TNB~5 and bactericide CHR 0107 The mass ratio is 1:1.

In the present invention, the matrix includes 55 to 65 parts of deionized water in terms of parts by mass, preferably 60 parts.

In the present invention, the matrix includes 0.2 to 0.5 parts of dispersant in terms of parts by mass, preferably 0.3 to 0.4 parts. In the present invention, the dispersant is preferably a polycarboxylic acid anionic surfactant; the polycarboxylic acid anionic surfactant preferably includes polycarboxylic acid anionic surfactant 5040 and/or polycarboxylic acid anionic surface Active agent CFC6530.

In the present invention, the matrix includes 3 to 6 parts of matting powder in terms of parts by mass, preferably 5 parts. In the present invention, the matting powder preferably includes amorphous silica. In the present invention, the particle size of the matting powder is preferably 2.5-6 μm, and more preferably a mixed matting powder of 2.5-3 μm and 5-6 μm.

In the present invention, the matrix includes 0.5 to 1 part of defoaming agent in terms of mass parts, preferably 0.6 to 0.8 parts. In the present invention, the defoaming agent preferably includes a polyether-modified silicon defoaming agent. In the present invention, the polyether-modified silicon defoamer preferably includes TSA~630 and/or 62B.

In the present invention, in terms of parts by mass, the matrix includes 15 to 25 parts of aqueous polyurethane dispersion, preferably 20 parts. In the present invention, the aqueous polyurethane dispersion is preferably B-1C or NMTR5201.

In the present invention, the matrix includes 1 to 2 parts of leveling agent in terms of parts by mass, preferably 1.5 parts. In the present invention, the leveling agent is preferably a polyurethane associative thickening leveling agent. In the present invention, the polyurethane associative thickening and leveling agent is preferably YC-100D, RHEOLATE212 or H200D.

In the present invention, in terms of parts by mass, the matrix includes 3 to 5 parts of silicone dispersion, more preferably 4 parts. In the present invention, the silicone dispersion preferably includes one or more of the silicone dispersions FE212, FE215 and LS~902E, and is more preferably the silicone dispersion FE212.

In the present invention, the matrix includes 0.5 to 1.5 parts of pH adjuster in terms of parts by mass, preferably 1 part. In the present invention, the pH adjuster preferably includes aminomethyl propanol.

In the present invention, in terms of parts by mass, the matrix includes 2 to 6 parts of thickener, preferably 3 to 5 parts. In the present invention, the thickener preferably includes polymethacrylic acid emulsion; the concentration of the polymethacrylic acid emulsion is preferably 29 to 31 wt%.

In the present invention, in terms of parts by mass, the matrix includes 4 to 6 parts of polyether-modified silicone wetting agent, more preferably 5 parts. In the present invention, the polyether-modified silicone wetting agent preferably includes polyether-modified silicone wetting agent Wink061 and/or DCA~1044.

In the present invention, the mass ratio of the bactericide and deionized water is 0.1-0.3:55-65, preferably 0.2:55-65. In the present invention, the bactericide is preferably a mixture of bactericide TNB~5 and bactericide CHR 0107; the mass ratio of the bactericide TNB~5 and bactericide CHR 0107 is preferably 1:1.

The present invention also provides a preparation method of the above-mentioned coating agent, which includes the following steps:

Mix deionized water, dispersant, matting powder, defoaming agent, water-based polyurethane dispersion, leveling agent, silicone dispersion, pH regulator, thickener and polyether modified silicone wetting agent to obtain matrix;

The base and the bactericide are packaged independently to obtain the coating agent.

In the present invention, the mixing is preferably:

The deionized water is first mixed with the dispersant, matting powder, and defoaming agent in sequence to obtain a first mixed liquid;

The first mixed liquid is sequentially mixed with an aqueous polyurethane dispersion, a leveling agent and a silicone dispersion for a second time to obtain a second mixed liquid;

The second mixed liquid is sequentially mixed with a pH adjuster and a thickener for a third time to obtain a third mixed liquid;

The third mixed liquid and the polyether-modified silicone wetting agent are mixed for the fourth time to obtain the matrix.

In the present invention, the rotation speed of the first mixing is preferably 800-1000r/min, more preferably 900r/min; the time is preferably 0.5-1h, more preferably 30-40min. In the present invention, during the first mixing, the time interval for sequentially adding dispersant, matting powder, and defoaming agent is 5 to 10 minutes.

In the present invention, the rotation speed of the second mixing is preferably 500-600 r/min, more preferably 550 r/min; the time is preferably 10-20 min, more preferably 15 min.

In the present invention, the rotation speed of the third mixing is preferably 1000-1200 r/min, more preferably 1100 r/min; the time is preferably 20-30 min, more preferably 25 min.

In the present invention, the fourth mixing speed is preferably 800-1000r/min, more preferably 900r/min; the time is preferably 0.5-1h, more preferably 30-40min.

The technical solutions in the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Example 1

The composition of the coating agent includes a base and a fungicide in individual packages;

In terms of parts by mass, the matrix consists of the following components:

Deionized water: 60 parts; polycarboxylic anionic surfactant 5040 0.3 parts;

Amorphous silica: 5 parts; the particle size of amorphous silica is 2.5~3μm and 5~6μm, of which 2.5~3μm has 2 parts and 5~6μm has 3 parts;

Polyether modified silicon defoamer TSA～630: 0.2 parts; water-based polyurethane dispersion NMTR5201: 20 parts;

Leveling agent YC-100D: 1.5 parts; silicone dispersion FE212: 3 parts;

Aminomethyl propanol: 1 part; polymethacrylic acid emulsion (concentration: 30wt%): 4 parts; polyether modified silicone wetting agent DCA~1044: 5 parts.

Fungicide: 0.2 parts; including TNB-5: 0.1 parts; CHR 1017: 0.1 parts.

Comparative example 1

The only difference from Example 1 is that no antibacterial agent is added.

Comparative example 2

The only difference from Example 1 is that the bactericide is antibacterial agent TNB~5: 0.05 parts.

Comparative example 3

The only difference from Example 1 is that the bactericide is the antibacterial agent TNB~5: 0.1 part.

Comparative example 4

The only difference from Example 1 is that the bactericide is antibacterial agent TNB~5: 0.15 parts.

Comparative example 5

The only difference from Example 1 is that the bactericide is antibacterial agent CHR 1017: 0.05 parts.

Comparative example 6

The only difference from Example 1 is that the bactericide is antibacterial agent CHR 1017: 0.1 part.

Comparative example 7

The only difference from Example 1 is that the bactericide is antibacterial agent CHR 1017: 0.15 parts.

Comparative example 8

The only difference from Example 1 is that the bactericide is 0.05 parts of antibacterial agent CHR 1017 and 0.05 part of antibacterial agent TNB~5.

Comparative example 9

The only difference from Example 1 is that the bactericide is 0.2 parts of antibacterial agent CHR 1017 and 0.1 part of antibacterial agent TNB~5.

Comparative example 10

The only difference from Example 1 is that the bactericide is 0.1 part of antibacterial agent CHR 1017 and 0.2 part of antibacterial agent TNB~5.

Comparative example 11

The only difference from Example 1 is that the bactericide is 0.1 part of the antibacterial agent CHR 1017 and 0.05 part of the antibacterial agent TNB~5.

Comparative example 12

The only difference from Example 1 is that the bactericide is 0.05 parts of the antibacterial agent CHR 1017 and 0.1 part of the antibacterial agent TNB~5.

The coating agents of Example 1 and Comparative Examples 1 to 12 were applied to the surface of PVC gloves to form coated gloves. The odor conditions during and after coating are shown in Table 1.

Table 1 Application of coating agents in Example 1 and Comparative Examples 1 to 12

Experimental situation Example 1 The production trough and gloves are odor-free Comparative example 1 The PVC gloves have a peculiar smell after 24 hours, and the production trough has a peculiar smell. After 7 days, the trough has a rotten smell after cleaning. Comparative example 2 PVC gloves have a peculiar smell after 30 hours, and there is a peculiar smell after cleaning the production trough Comparative example 3 PVC gloves have a peculiar smell after 48 hours, and the production trough has a peculiar smell. Comparative example 4 The PVC gloves have a peculiar smell after 72 hours, and the production trough has a slight peculiar smell. Comparative example 5 PVC gloves have a peculiar smell after 32 hours, and there is a peculiar smell after cleaning the production trough Comparative example 6 PVC gloves have a peculiar smell after 45 hours, and the production trough has a peculiar smell. Comparative example 7 The PVC gloves have a peculiar smell after 68 hours, and the production trough has a slight peculiar smell. Comparative example 8 PVC gloves have a peculiar smell after 55 hours, and the production trough has a peculiar smell. Comparative example 9 The production trough and gloves are odor-free Comparative example 10 The production trough and gloves are odor-free Comparative example 11 Feedback from PVC gloves has a slight smell Comparative example 12 PVC gloves have no feedback and smell, but there is a slight abnormal smell when cleaning the trough.

The above are only preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications can also be made. should be regarded as the protection scope of the present invention.

Claims (10)

1. A finish comprising an individually packaged substrate and a biocide; the matrix comprises the following components in parts by mass:

deionized water: 55-65 parts; 0.2 to 0.5 part of dispersing agent; extinction powder: 3-6 parts; defoaming agent: 0.5 to 1 part; aqueous polyurethane dispersion: 15-25 parts; leveling agent: 1-2 parts; silicone dispersion: 3-5 parts; pH regulator: 0.5 to 1.5 parts; and (3) a thickening agent: 2-6 parts; polyether modified organosilicon wetting agent: 4-6 parts;

the mass ratio of the bactericide to the deionized water is 0.1-0.3:55-65; the bactericide is a mixture of bactericides TNB-5 and bactericides CHR 0107; the mass ratio of the bactericide TNB-5 to the bactericide CHR 0107 is 1:1.

2. the finish of claim 1 wherein the matting agent comprises amorphous silica; the dispersing agent is a polycarboxylic acid type anionic surfactant.

3. The finish of claim 1 wherein the defoamer comprises a polyether modified silicon defoamer; the polyether modified silicon defoamer comprises TSA-630 and/or 62B.

4. The finish of claim 1 wherein the pH adjuster comprises aminomethylpropanol.

5. The finish according to claim 2, characterized in that the anionic polycarboxylic acid surfactant comprises anionic polycarboxylic acid surfactant 5040 and/or anionic polycarboxylic acid surfactant CFC6530.

6. The finish according to claim 1, wherein the polyether modified silicone based wetting agent comprises polyether modified silicone based wetting agent Wink061 and/or DCA-1044.

7. The finish of claim 1 wherein said thickener comprises a polymethacrylic emulsion.

8. The method of preparing a finish according to any one of claims 1 to 7, comprising the steps of:

mixing deionized water, a dispersing agent, matting powder, a defoaming agent, a water-based polyurethane dispersion, a leveling agent, an organosilicon dispersion, a pH regulator, a thickening agent and a polyether modified organosilicon wetting agent to obtain a matrix;

and (5) independently packaging the substrate and the bactericide to obtain the finishing agent.

9. The method of preparing according to claim 8, wherein the mixing is:

sequentially carrying out first mixing on deionized water, a dispersing agent, extinction powder and a defoaming agent to obtain a first mixed solution;

sequentially carrying out second mixing on the first mixed solution, the aqueous polyurethane dispersion, the leveling agent and the organosilicon dispersion to obtain a second mixed solution;

thirdly, sequentially mixing the second mixed solution with a pH regulator and a thickener to obtain a third mixed solution;

and fourth mixing the third mixed solution and the polyether modified organic silicon wetting agent to obtain the matrix.

10. The method of claim 9, wherein the first mixing is at a rotational speed of 800-1000 r/min; the time is 0.5-1 h;

the rotation speed of the second mixing is 500-600 r/min; the time is 10-20 min;

the rotating speed of the third mixing is 1000-1200 r/min; the time is 20-30 min;

the rotation speed of the fourth mixing is 800-1000 r/min; the time is 0.5-1 h.