WO2022088122A1

WO2022088122A1 - Water-based paint for leather and preparation method therefor

Info

Publication number: WO2022088122A1
Application number: PCT/CN2020/125603
Authority: WO
Inventors: 袁洪青
Original assignee: 河北比尔尼克新材料科技股份有限公司
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2022-05-05

Abstract

A water-based paint for leather and a preparation method therefor, the paint comprising a water-based tannic acid polyurethane resin, a water-based flexible acrylic emulsion, a color paste, a defoamer, a leveling agent, a wetting agent, a dispersant, a preservative and an adhesion promoter. By using water as a solvent, the paint saves a large amount of resources, does not contain harmful substances such as benzene, xylene, ethane and formaldehyde and other VOCs, has excellent corrosion resistance performance, good overcoating performance and anti-radiation, and may be directly stirred without passing through any grinding processes. The preparation method is simple and reliable, which eliminates the hidden danger of a fire during construction and storage, and also reduces air pollution, and construction can also be carried out as usual in a closed environment. The paint has strong adhesion on a leather surface, strong weather resistance, and a simple operation. A coating tool may be washed directly using water, greatly reducing the harm towards construction personnel; in addition, the paint may be widely used on leather and may be applied in outdoor large-area construction, and the method is simple and easy to execute.

Description

A kind of leather water-based paint and preparation method thereof

technical field

The invention relates to a water-based paint and a preparation method thereof, in particular to a leather water-based paint and a preparation method thereof, belonging to the field of coatings.

Background technique

Since the beginning of the 21st century, environmental protection has attracted more and more attention from the world. In the coating industry, solvent-based coatings contain a large amount of volatile organic solvents (VOCs), which are discharged into the atmosphere during use, which not only damages the atmospheric environment, but also endangers people's health. At the same time, it also wastes resources and wastes energy. At present, water-based coatings, powder coatings, high-solid coatings and radiation-cured coatings are generally referred to as environmentally friendly coatings.

Coatings based on water-soluble resins or water-dispersible resins, including synthetic polymer emulsions, are called water-based coatings. Therefore, water-based coatings are also often referred to as water-based coatings. Coatings based on synthetic polymer emulsions are called water-based coatings.

Leather paint is currently used to decorate electronic exterior parts to increase the comfort of its visual appearance and hand feel. It is expected that it will be widely used in the surface treatment of daily necessities in the future to increase the comfort of users. In the prior art, organic fillers are often added to the spraying of leather paint, which has an unpleasant smell, is not good for the health of employees, and is not environmentally friendly. The development of environmentally friendly coatings is one of the development directions of the domestic coating industry, mainly to reduce the emission of organic solvents, reduce environmental pollution.

technical problem

At present, traditional paint products have been used on leather. The main components are xylene, butanol, petroleum resin, etc., which are inflammable and explosive products. It is an inevitable trend to become an environmentally friendly water-based paint product. Water-based paint on leather is prone to exploding skin and falling off, and the adhesion and anti-corrosion performance are not achieved.

technical solutions

In view of this, the present invention provides a kind of leather water-based paint and preparation method thereof, and specifically adopts the following technical scheme:

A water-based paint for leather, comprising the following raw materials in parts by weight:

45-60 parts of water-based tannic polyurethane resin, 20-30 parts of water-based flexible acrylic emulsion, 15-20 parts of color paste, 3-5 parts of defoamer, 2-5 parts of leveling agent, 2-10 parts of wetting agent, 8-15 parts of dispersant, 2-8 parts of preservative, 3-10 parts of adhesion promoter.

Preferably, it includes the following raw materials in parts by weight: 45-58 parts of water-based tannic polyurethane resin, 20-28 parts of water-based flexible acrylic emulsion, 15-20 parts of color paste, 3-5 parts of defoamer, and 2- 5 parts, wetting agent 2-8 parts, dispersing agent 8-13 parts, preservative 2-6 parts, adhesion promoter 3-8 parts.

Preferably, it includes the following raw materials in parts by weight: 45-55 parts of water-based tannic urethane resin, 20-25 parts of water-based flexible acrylic emulsion, 15-18 parts of color paste, 3-4.5 parts of defoamer, 2- 4.5 parts, wetting agent 2-5 parts, dispersing agent 8-10 parts, preservative 2-5 parts, adhesion promoter 3-6 parts.

Further, the color paste is an inorganic color paste.

Further, the defoamer is TSA-10A;

The leveling agent is SN-3094;

Wetting agent is SN-3711;

The dispersant is XN3800;

The preservative is MKB3;

The adhesion promoter was TL-BPA.

The present invention also provides the preparation method of the above-mentioned leather water-based paint, comprising the following steps:

1) Weigh the raw materials according to the above parts by weight;

2) Mix the water-based tannic acid polyurethane resin and the water-based flexible acrylic emulsion, and stir evenly;

3) Add color paste to the mixture and continue stirring;

4) Add defoaming agent, leveling agent, wetting agent, dispersing agent, preservative and adhesion promoter in sequence to the stirred mixture, and stir evenly to obtain water-based leather paint.

Further, in step 2), the stirring speed is 800-1000 rpm, and the stirring time is 20-30 minutes.

Further, in step 3), the rotational speed of continuous stirring is 200-500 rpm, and the stirring time is 5-10 minutes.

Further, step 4) also includes the operation of stirring while adding defoaming agent, leveling agent, wetting agent, dispersing agent, preservative, and adhesion promoter.

beneficial effect

The beneficial effect of the present invention is that the present invention uses water as a solvent, saves a lot of resources, does not contain VOC harmful substances such as benzene, xylene, ethane, formaldehyde, etc., has excellent anti-corrosion performance, good overcoating performance, anti-radiation, and does not undergo any grinding. The procedure can be directly stirred, the preparation method is simple and reliable, the fire hazard during construction and storage is eliminated, the air pollution is reduced, and the construction can be carried out as usual in a closed environment. The invention has strong adhesion on the leather surface, strong weather resistance, simple operation performance, and the coating tools can be directly washed with water, which greatly reduces the damage to construction personnel, can be widely used on leather, can be constructed in large areas outdoors, and the method is simple Easy construction (spraying, brushing, rolling, electrostatic spraying, etc.).

Detailed ways

[0006] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all 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 shall fall within the protection scope of the present invention.

In the following examples, the water-based tannic acid polyurethane resin, the model is SWW-102, and the manufacturer is Kunshan Sanwang Resin Co., Ltd.;

Water-based flexible acrylic emulsion, model ABB-20, the manufacturer is Nantong Tianhe Resin Co., Ltd.;

Inorganic color paste, the model is DAE-N01, the manufacturer is Jiangsu Fuqisen New Materials Co., Ltd.;

Defoamer, the model is TSA-10A, the manufacturer is Jiangsu Tengda Auxiliary Co., Ltd.;

Leveling agent, the model is SN-3094, the manufacturer is Shanghai Shenzhu Chemical Technology Co., Ltd.;

Wetting agent, the model is SN-3711, the manufacturer is Shanghai Shenzhu Chemical Co., Ltd.;

Dispersant, the model is XN3800, the manufacturer is Shanghai Zhongjixing Chemical Co., Ltd.;

Preservative, the model is MKB3, and the manufacturer is Thor Specialty Chemicals (Shanghai) Co., Ltd.;

Adhesion promoter, the model is TL-BPA, and the manufacturer is Okter Chemical Co., Ltd.

Example 1

The preparation method of leather water-based paint comprises the following steps:

1) Weigh 60g of water-based tannic polyurethane resin, 30g of water-based flexible acrylic emulsion, 20g of color paste, 5g of defoamer, 5g of leveling agent, 10g of wetting agent, 15g of dispersant, 8g of preservative, and 10g of adhesion promoter raw material;

2) Mix the water-based tannic acid polyurethane resin and the water-based flexible acrylic emulsion, stir for 20 minutes, and rotate at 800 rpm;

3) Add color paste to the mixture, continue stirring for 8 minutes, and the speed is 200 rpm;

4) Add defoaming agent, leveling agent, wetting agent, dispersing agent, preservative and adhesion promoter to the stirred mixture in turn while stirring, and stir evenly to obtain water-based leather paint.

Example 2

1) Weigh 45g of water-based tannic polyurethane resin, 20g of water-based flexible acrylic emulsion, 15g of color paste, 3g of defoamer, 2g of leveling agent, 2g of wetting agent, 8 of dispersant, 2g of preservative, and 3g of adhesion promoter raw material;

Example 3

1) Weigh 45g of water-based tannic polyurethane resin, 28g of water-based flexible acrylic emulsion, 15g of color paste, 5g of defoamer, 5g of leveling agent, 2g of wetting agent, 8g of dispersant, 6g of preservative, and 3g of adhesion promoter raw material;

Example 4

1) Weigh 45g of water-based tannic polyurethane resin, 20g of water-based flexible acrylic emulsion, 20g of color paste, 5g of defoamer, 5g of leveling agent, 7g of wetting agent, 12g of dispersant, 2g of preservative, and 3g of adhesion promoter raw material;

Example 5

1) Weigh 55g of water-based tannic polyurethane resin, 26g of water-based flexible acrylic emulsion, 15g of color paste, 3g of defoamer, 5g of leveling agent, 2g of wetting agent, 11g of dispersant, 5g of preservative, and 3g of adhesion promoter raw material;

Example 6

1) According to water-based tannic polyurethane resin 55g, water-based flexible acrylic emulsion 25g, color paste 18g, defoamer 4.5g, leveling agent 4.5g, wetting agent 5g, dispersant 10g, preservative 5g, adhesion promoter 6g Weigh the raw materials;

Performance testing

The leather water-based paint prepared by the above embodiment is carried out performance detection, and the detection items and results are as follows:

Table 1 Performance testing items and results of leather water-based paint

As can be seen from Table 1, the water-based paint of the present invention is a uniform and non-hard-block water-based liquid product with low fineness, high gloss and hardness, and excellent blocking resistance, scratch resistance, water resistance, alkali resistance and solvent resistance.

According to the standard of GB/T 23986-2009 "Gas Chromatography for Determination of Organic Compound (VOC) Content in Paints and Varnishes", the volatile organic compound (VOC) content in the water-based paints obtained by each embodiment of the present invention is detected, and the obtained The results are shown in Table 2:

Table 2 Test results of volatile organic compounds (VOC) content of water-based paints for leather

It can be seen from Table 2 that the volatile organic compound (VOC) content in the water-based paint of the present invention is far lower than the standard required by GB/T 23986-2009, and the water-based paint of the present invention has excellent green and environmental protection effects.

According to American Society for Testing and Materials-ASTM F 963-11-Standard for Soluble Heavy Metal Content in Substrate/Ink or Coating 5) - According to ASTM The F 963-11 (I record 8.3) sample was extracted with dilute hydrochloric acid and analyzed by ICP-OES. The results are shown in Table 3:

The soluble heavy metal content detection result in table 3 water-based paint of the present invention

Note: MDL means detection limit, ND means not detected.

As can be seen from Table 3, the water-based paint of the present invention does not contain soluble heavy metal elements such as lead, arsenic, palladium, cadmium, chromium and mercury, nor does it contain soluble pollution elements such as selenium, and the water-based paint of the present invention is safe and environmentally friendly, and has no pollution.

Although the present invention has been illustrated and described with specific embodiments, it should be appreciated that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limit them; those of ordinary skill in the art should understand that: In the case of deviating from the spirit and scope of the present invention, the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the corresponding technical solutions. Essentially depart from the scope of the technical solutions of the embodiments of the present invention; therefore, it is intended that all such substitutions and modifications that fall within the scope of the present invention be included in the appended claims.

Claims

A kind of leather water-based paint, is characterized in that, comprises the raw material of following parts by weight:

45-60 parts of water-based tannic polyurethane resin, 20-30 parts of water-based flexible acrylic emulsion, 15-20 parts of color paste, 3-5 parts of defoamer, 2-5 parts of leveling agent, 2-10 parts of wetting agent, 8-15 parts of dispersant, 2-8 parts of preservative, 3-10 parts of adhesion promoter.
leather water-based paint according to claim 1, is characterized in that, comprises the raw material of following parts by weight:

45-58 parts of water-based tannic polyurethane resin, 20-28 parts of water-based flexible acrylic emulsion, 15-20 parts of color paste, 3-5 parts of defoamer, 2-5 parts of leveling agent, 2-8 parts of wetting agent, 8-13 parts of dispersant, 2-6 parts of preservative, 3-8 parts of adhesion promoter.
leather water-based paint according to claim 1, is characterized in that, comprises the raw material of following parts by weight:

45-55 parts of water-based tannic polyurethane resin, 20-25 parts of water-based flexible acrylic emulsion, 15-18 parts of color paste, 3-4.5 parts of defoamer, 2-4.5 parts of leveling agent, 2-5 parts of wetting agent, 8-10 parts of dispersant, 2-5 parts of preservative, 3-6 parts of adhesion promoter.
The water-based paint for leather according to any one of claims 1-3, wherein the color paste is an inorganic color paste.
The water-based paint for leather according to any one of claims 1-3, wherein the defoamer is TSA-10A;

The leveling agent is SN-3094;

The wetting agent is SN-3711;

The dispersant is XN3800;

The preservative is MKB3;

The adhesion promoter is TL-BPA.
A kind of preparation method of leather water-based paint, is characterized in that, comprises the following steps:

1) Weigh the raw materials according to the parts by weight described in any one of claims 1-5;

2) Mix the water-based tannic acid polyurethane resin and the water-based flexible acrylic emulsion, and stir evenly;

3) Add color paste to the mixture and continue stirring;

4) Add defoaming agent, leveling agent, wetting agent, dispersing agent, preservative and adhesion promoter in sequence to the stirred mixture, and stir evenly to obtain water-based leather paint.
The method for preparing water-based paint for leather according to claim 6, wherein the stirring speed in step 2) is 800-1000 rpm, and the stirring time is 20-30 minutes.
The preparation method of leather water-based paint according to claim 6, wherein the continuous stirring speed in step 3) is 200-500 rpm, and the stirring time is 5-10 minutes.
The preparation method of leather water-based paint according to claim 6, characterized in that, step 4) also includes adding defoaming agent, leveling agent, wetting agent, dispersing agent, antiseptic, and adhesion promoter simultaneously. stirring operation.