WO2020237417A1

WO2020237417A1 - Aqueous coating specific for dip coating of small hardware, preparation method therefor, and use thereof, and small hardware device and preparation method therefor

Info

Publication number: WO2020237417A1
Application number: PCT/CN2019/088292
Authority: WO
Inventors: 袁洪青; 王立群
Original assignee: 河北比尔尼克新材料科技股份有限公司
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2020-12-03

Abstract

An aqueous coating specific for the dip coating of small hardware, preparation method therefor, and use thereof, and a small hardware device and preparation method therefor. The aqueous coating specific for the dip coating of small hardware comprises the following raw materials by mass fraction: 40-65% of an aqueous silicone-modified amino resin, 3-8% of an aqueous anti-sag agent, and the balance of water. The aqueous coating specific for the dip coating of small hardware can be obtained after mixing the raw materials. The aqueous coating is used for forming a protective layer on the surface of a device body, so that a small hardware device is obtained.

Description

Special water-based paint for dipping small hardware, preparation method and use thereof, small hardware device and preparation method thereof

Technical field

The present disclosure relates to the technical field of hardware protection, in particular to a special water-based paint for dipping small hardware, a preparation method and application thereof, and a small hardware device and a preparation method thereof.

Background technique

At present, the hardware industry, such as the protective paint in the hardware industry, has always used oil-based paint. The oil-based paint is coated on the surface of the device and then baked at a high temperature to form a protective layer, and the protective layer is easy to fall off, and the oil-based coating is applied and baked. There are a lot of volatile organic compounds (VOCs) during the baking process, which cause harm to the human body and cause a very high incidence of occupational diseases. Therefore, oil-based paint is a backward and highly polluting material. With the increasing popularity of green and environmental protection, almost all of the hardware industry is in a state of discontinuation. There is an urgent need for coatings with good weather resistance, good corrosion resistance, high gloss, no sag, environmental protection standards, and long-term use to ensure smooth production.

Public content

In order to solve at least one of the above technical problems, the purpose of the present disclosure is to provide a special water-based paint for dipping hardware. The water-based paint has good weather resistance and anti-corrosion performance, almost contains no VOCs, and does not produce flow when coated on the surface of the device. Hanging phenomenon, strong ability to combine with the body of small hardware devices, the protective layer formed by the water-based coating has good weather resistance, corrosion resistance, smooth surface, high gloss, not easy to fall off, long use time, and environmental protection standards.

The special water-based paint for dipping hardware provided by the present disclosure includes the following mass fractions of raw materials: 55-75% of water-based organosilicon modified amino resin, 4-8% of water-based anti-sagging agent, and the balance water.

Further, the special water-based paint for dipping hardware includes the following mass fractions of raw materials: water-based silicone modified amino resin 55-65%, water-based anti-sagging agent 3-6%, and the balance water;

Preferably, the raw materials include the following mass fractions: 65% of the water-based silicone modified amino resin, 6% of the water-based anti-sagging agent, and the balance of water.

Further, the water-based anti-sagging agent includes a water-based anti-sagging agent with the brand name BE775 and/or Haimingsi THIXATROL P200X.

Further, the special water-based paint for dipping hardware further includes the following raw materials: at least one of methyl etherified melamine resin, dispersant, leveling agent, defoamer, water-based color paste and anti-flash rust agent;

Preferably, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: methyl etherified melamine resin 10-15%, preferably 13%;

Preferably, the special water-based paint for small hardware dip coating further includes the following mass fraction of raw materials: dispersant 1-3%, preferably 2%;

Preferably, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: leveling agent 2-4%, preferably 3%;

Preferably, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: defoamer 1-3%, preferably 2%;

Preferably, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: 10-20% of water-based color paste, preferably 15%;

Preferably, the special water-based paint for small hardware dip coating further includes the following mass fraction of raw materials: anti-flash rust agent 1-3%, preferably 2%.

Further, the dispersant includes at least one of the dispersants of the brands Tech-6076, Tech-6077 and Tech-690;

Preferably, the leveling agent includes at least one of the leveling agents of Tech-2845, Tech-2733 and Tech-2750;

Preferably, the defoamer includes at least one of the defoamers with the brands Tech-420, Tech-402 and Tech-405W;

Preferably, the water-based color paste includes CTH-1110 and/or CTH-5020 water-based color paste;

Preferably, the anti-flash rust agent includes R-760F anti-flash rust agent.

A method for preparing the aforementioned special water-based paint for dipping small hardware, the preparation method comprises: mixing various raw materials to obtain the special water-based paint for dipping small hardware.

A use of the aforementioned special water-based paint for dipping small hardware in the protection of small hardware devices.

A small hardware device includes a device body and a protective layer, wherein the protective layer is prepared by using the aforementioned small hardware dipping special water-based paint.

A method for preparing the aforementioned small hardware device, the preparation method comprising: forming a protective layer on the surface of the device body to obtain the small hardware device.

Further, the protective layer is prepared by the following method: dip-coating the special water-based paint for dipping the hardware on the surface of the device body and then drying;

Preferably, the drying includes baking;

Preferably, the baking temperature is 130-170°C, preferably 150°C, and the time is 10-30 minutes, preferably 20 minutes.

The present disclosure can at least achieve the following beneficial effects:

The water-based silicone modified amino resin has excellent weather resistance and water resistance, good acid, alkali, and salt corrosion resistance, high hardness and gloss; water-based anti-sagging agent can increase the viscosity of the special water-based paint for dipping small hardware and help prevent small hardware The special water-based paint for dipping has sagging phenomenon, and the water-based silicone modified amino resin and water-based anti-sagging agent contain almost no VOCs. VOCs volatilize very little when used, which is beneficial to meet environmental protection requirements; use this hardware to dip coating The protective layer prepared by the special water-based paint has strong ability to bond with the body of the small hardware device, high gloss, flatness, corrosion resistance, good weather resistance, high hardness, long use time, and almost no peeling off.

Detailed ways

The technical solutions of the present disclosure will be clearly and completely described below in conjunction with embodiments. Obviously, the described embodiments are part of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

In one aspect of the present disclosure, the present disclosure provides a special water-based paint for dipping hardware. The water-based paint for dipping hardware includes raw materials with the following mass fractions: 40-65% water-based silicone modified amino resin, water-based anti-sagging 3-8%, and the balance of water; for example, the special water-based paint for hardware dipping includes the following mass fraction of raw materials: water-based silicone modified amino resin 40%, 45%, 50%, 55%, 57%, 59 %, 61%, 63% or 65%, etc., water-based anti-sagging agent 3%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5% or 8%, etc., and the rest Amount of water. It should be noted that the remaining amount of water refers to the remaining amount except for the water-based silicone-modified amino resin, water-based sagging agent, and optional other components in the water-based paint dedicated for dipping hardware in the present disclosure. The sum of the mass percentages of water, water and water-based silicone modified amino resin, water-based sagging agent and optionally other components is 100%.

The water-based silicone modified amino resin has excellent weather resistance and water resistance, good acid, alkali, and salt corrosion resistance, high hardness and gloss. The water-based anti-sagging agent can increase the viscosity of the special water-based paint for dipping of small hardware and help prevent small hardware The special water-based paint for dipping has sagging phenomenon, and the water-based silicone modified amino resin and water-based anti-sagging agent contain almost no VOCs. VOCs volatilize very little when used, which is beneficial to meet environmental protection requirements; use this hardware to dip coating The protective layer prepared by the special water-based paint has strong ability to bond with the body of the small hardware device, high gloss, flatness, corrosion resistance, good weather resistance, high hardness, long use time, and almost no peeling off. When the content of the water-based anti-sagging agent is too low, it will cause sagging. When the content of the water-based anti-sagging agent is too high, the special water-based paint for dipping hardware will not level easily.

In some preferred embodiments of the present disclosure, the special water-based paint for hardware dipping includes the following mass fractions of raw materials: water-based silicone modified amino resin 55-65%, water-based anti-sagging agent 3-8%, and the balance of water . In some more preferred embodiments of the present disclosure, the special water-based paint for dipping hardware includes the following mass fractions of raw materials: 65% of water-based silicone modified amino resin, 6% of water-based anti-sagging agent, and the balance of water.

In some embodiments of the present disclosure, the water-based anti-sagging agent includes a water-based anti-sagging agent under the brand name BE775 and/or THIXATROL P200X. Therefore, the viscosity of the anti-vulcanizing agent is appropriate, and the effect of preventing the sagging phenomenon of the special water-based paint for small hardware dipping is better.

In some embodiments of the present disclosure, the special water-based paint for dipping hardware further includes the following raw materials: methyl etherified melamine resin, dispersant, leveling agent, defoamer, water-based color paste and anti-flash rust agent. At least one. As a result, the addition of methyl etherified melamine resin enhances the bonding force between the special water-based coating for hardware dipping and the device body, and the dispersant can reduce the time and energy required to complete the dispersion process; the leveling agent can effectively improve the special dipping for hardware The surface tension of the water-based paint is beneficial to improve the surface smoothness of the protective layer prepared by the special water-based paint for dipping the hardware; the addition of defoamer will hardly produce a protective layer with surface defects; the addition of water-based color paste can make the hardware The special water-based paint for dipping has different colors, which is beneficial to obtain a protective layer with different colors (such as red, green, yellow, white or orange, etc.); the addition of anti-flash rust agent helps to further improve the corrosion resistance of the special water-based paint for dipping hardware Sex.

In some embodiments of the present disclosure, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: methyl etherified melamine resin 10-15%, preferably 13%.

In some embodiments of the present disclosure, the methyl etherified melamine resin includes a methyl etherified melamine resin under the brand name of Haminol300.

In some embodiments of the present disclosure, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: dispersant 1-3%, for example, the content of dispersant can be 1%, 1.5%, 2%, 2.5% Or 3% etc. Relative to the above content range, when the content of the dispersant is too high or too low, it will affect the gloss of the coating.

In some preferred embodiments of the present disclosure, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: dispersant 2%.

In some embodiments of the present disclosure, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: leveling agent 2-4%, for example, the content of leveling agent can be 2%, 2.5%, 3%, 3.5% or 4%, etc. Relative to the above content range, when the content of the leveling agent is too high, it will affect recoating, and when the content of the leveling agent is too low, it is relatively difficult to level.

In some preferred embodiments of the present disclosure, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: a leveling agent 3%.

In some embodiments of the present disclosure, the special water-based paint for hardware dip coating further includes the following mass fractions of raw materials: defoaming agent 1-3%, for example, the content of defoaming agent can be 1%, 1.5%, 2%, 2.5% or 3%, etc. Relative to the above content range, when the content of the defoamer is too high, shrinkage cavities will be formed on the surface of the coating. When the content of the defoamer is too low, the water-based paint for hardware dipping will contain bubbles, resulting in The coating surface is relatively prone to defects.

In some preferred embodiments of the present disclosure, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: 2% defoamer.

In some embodiments of the present disclosure, the special water-based paint for hardware dipping further includes the following mass fraction of raw materials: 10-20% of water-based color paste, for example, the content of water-based color paste can be 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19% or 20%, etc. Relative to the above content range, when the content of the water-based color paste is too high, it will affect the gloss of the coating, and when the content of the water-based color paste is too low, the covering ability of the coating is relatively weak.

In some preferred embodiments of the present disclosure, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: 15% water-based color paste.

In some embodiments of the present disclosure, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: anti-flash rust agent 1-3%, for example, the content of the anti-flash rust agent can be 1%, 1.5%, 2 %, 2.5% or 3% etc. Relative to the above content range, when the content of the anti-flash rust agent is too high, the water resistance of the coating will be affected, and when the content of the anti-flash rust agent is too low, the anti-rust phenomenon will occur.

In some preferred embodiments of the present disclosure, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: 2% anti-flash rust agent.

In some embodiments of the present disclosure, the dispersing agent includes at least one of the dispersing agents of the brands Tech-6076, Tech-6077, and Tech-690; the leveling agent includes the dispersing agents of the brands Tech-2845, Tech-690 At least one of 2733 and Tech-2750 leveling agent; the defoaming agent includes at least one of the defoaming agents of the brands Tech-420, Tech-402 and Tech-405W; the water-based colorant includes Water-based colorant with the brand of CTH-1110 and/or CTH-5020; the anti-flash rust agent includes the anti-flash rust agent with the brand R-760F. Therefore, the material sources are wide, the price is lower, and the performance is better.

In another aspect of the present disclosure, the present disclosure provides a method for preparing the aforementioned special water-based paint for dipping hardware. The preparation method includes: mixing the raw materials to obtain the special water-based paint for dipping the hardware. Therefore, the preparation method is simple, convenient, and easy to implement.

In another aspect of the present disclosure, the present disclosure provides a use of the aforementioned special water-based paint for dipping small hardware in the protection of small hardware devices. Therefore, the service life of small hardware devices can be effectively extended.

In another aspect of the present disclosure, the present disclosure provides a small hardware device, which includes a device body and a protective layer, wherein the protective layer is prepared by using the aforementioned hardware dipping special water-based paint. As a result, the protective layer has strong corrosion resistance, good weather resistance, high hardness, high gloss, smooth surface, strong bonding ability with the hardware device body, not easy to fall off, and no peeling off the entire layer, which makes the hardware long lasting.

In some embodiments of the present disclosure, the hardware may include, but is not limited to, nails, screws, iron wires, locks, hinges, latches, springs, and the like.

In another aspect of the present disclosure, the present disclosure provides a method for preparing the aforementioned hardware device. The preparation method includes: forming a protective layer on the surface of the device body to obtain the hardware device.

In some embodiments of the present disclosure, the protective layer is prepared by the following method: dip-coating the small hardware dipping special water-based paint on the surface of the device body and then drying. Therefore, the operation is simple and convenient, easy to realize, no dust is volatilized, and the volatile matter is water vapor, which does not harm the human body.

In some embodiments of the present disclosure, the drying includes baking. Therefore, the drying effect is better. Therefore, the water-based silicone modified amino resin and the water-based anti-sagging agent cooperate with each other during the drying process to speed up the surface drying speed of the special water-based coating for hardware dipping, and during the drying process, the water-based silicone modified amino resin There are no gaps between the molecules generated by the reaction between the resin and the anti-sagging agent. Water is not easy to penetrate the coating. The coating and the hardware have a strong bonding ability and are not easy to fall off. There is almost no VOCs during the drying process. The volatilization, no harm to the human body, reduces the incidence of occupational diseases.

In some preferred embodiments of the present disclosure, the baking temperature is 130-170°C, for example, the baking temperature may be 130°C, 140°C, 150°C, 160°C or 170°C. Since the water-based silicone modified amino resin in the special water-based coating for hardware dipping is easy to cure, the baking temperature is lower. Compared with the prior art, the oil-based paint is baked at a high temperature of 200°C. The baking temperature is beneficial Energy saving. In some more preferred embodiments of the present disclosure, the baking temperature is 150°C.

In some preferred embodiments of the present disclosure, the baking time is 10-30 minutes, for example, the baking time may be 10 minutes, 15 minutes, 20 minutes, 25 minutes, or 30 minutes. Compared with the baking time (50 minutes) for the oil-based paint in the prior art, the baking time for the special water-based paint for dipping hardware is greatly shortened, which is beneficial to saving energy. In some more preferred embodiments of the present disclosure, the baking time is 20 minutes.

In this disclosure, the water-based silicone modified amino resin and the water-based anti-sagging agent are combined, and after the water-based paint for dipping hardware is dipped on the surface of the hardware device body, the anti-sagging performance is good and the surface drying speed is fast. It has strong adhesion to the body of small hardware devices, and the formed protective layer has good hardness and is not easy to fall off; in addition, during the process of coating small hardware dipping special water-based paint, no dust volatilizes, and the volatile matter is water vapor, which does not harm the human body. In the process of baking the special water-based paint for dipping hardware, the baking temperature is low and the time is short. Compared with the temperature and time of baking oil-based paint, the temperature and time of baking the special water-based paint for dipping hardware of the present disclosure are lower Short, save energy, and produce very low VOCs, which meets the standard (less than 5mg/L).

Example

In Examples 1-8 and Comparative Examples 1-2, the water-based silicone-modified amino resin, water-based anti-sagging agent, dispersant, leveling agent, defoamer, water-based color paste and anti-foaming agent in the special water-based coating for hardware dipping The mass fraction of flash rust agent can be seen in Table 1:

Table 1

Comparative example 3

Oil-based paint.

After dip-coating the water-based paints of Examples 1-8 and Comparative Examples 1-2 and the oil-based paint of Comparative Example 3 on the iron locks, observe whether the sagging phenomenon occurs, and then dry the iron locks coated with the paint and measure The volatile amount of VOCs during baking, the measurement results are shown in Table 2 below:

Table 2

Among them, the volatilization amount of VOCs of the special water-based paint for dipping hardware in Example 4 was 3 mg/L when baked, and the volatilization amount of VOCs was 400 g/L when the oil-based paint in Comparative Example 3 was baked.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: It is still possible to modify the technical solutions described in the foregoing embodiments, or equivalently replace some or all of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present disclosure. range.

Claims

A special water-based paint for dipping hardware, which is characterized in that it comprises the following mass fractions of raw materials: 40-65% of water-based organosilicon modified amino resin, 3-8% of water-based anti-sagging agent, and the balance of water.
The special water-based paint for dipping hardware according to claim 1, characterized in that it comprises the following mass fractions of raw materials: water-based silicone modified amino resin 55-65%, water-based anti-sagging agent 3-6%, and the balance Of water

Preferably, the raw materials include the following mass fractions: 65% of the water-based silicone modified amino resin, 6% of the water-based anti-sagging agent, and the balance of water.
The special water-based paint for dipping hardware according to claim 1 or 2, characterized in that, the water-based anti-sagging agent comprises a water-based anti-sagging agent under the brand name BE775 and/or THIXATROL P200X.
The special water-based paint for dipping hardware according to claim 1, characterized in that, the water-based paint further comprises the following raw materials: methyl etherified melamine resin, dispersant, leveling agent, defoamer, water-based color paste and anti-foaming agent At least one of the flash rust agents;

Preferably, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: methyl etherified melamine resin 10-15%, preferably 13%;

Preferably, the special water-based paint for small hardware dip coating further includes the following mass fraction of raw materials: dispersant 1-3%, preferably 2%;

Preferably, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: leveling agent 2-4%, preferably 3%;

Preferably, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: defoamer 1-3%, preferably 2%;

Preferably, the special water-based paint for dipping hardware further includes the following mass fraction of raw materials: 10-20% of water-based color paste, preferably 15%;

Preferably, the special water-based paint for small hardware dip coating further includes the following mass fraction of raw materials: anti-flash rust agent 1-3%, preferably 2%.
The special water-based paint for dipping small hardware according to claim 4, characterized in that the dispersant comprises at least one of the dispersants of Tech-6076, Tech-6077 and Tech-690;

Preferably, the leveling agent includes at least one of the leveling agents of Tech-2845, Tech-2733 and Tech-2750;

Preferably, the defoamer includes at least one of the defoamers with the brands Tech-420, Tech-402 and Tech-405W;

Preferably, the water-based color paste includes CTH-1110 and/or CTH-5020 water-based color paste;

Preferably, the anti-flash rust agent includes R-760F anti-flash rust agent.
A preparation method of the special water-based paint for dipping small hardware according to any one of claims 1 to 5, characterized in that it comprises: mixing each raw material to obtain the special water-based paint for dipping small hardware.
A use of the special water-based paint for dipping small hardware according to any one of claims 1 to 5 in the protection of small hardware devices.
A small hardware device, characterized in that it comprises a device body and a protective layer, wherein the protective layer is prepared by using the special water-based paint for dipping the small hardware according to any one of claims 1-5.
A method for manufacturing a small hardware device according to claim 8, characterized in that it comprises: forming a protective layer on the surface of the device body to obtain the small hardware device.
The preparation method according to claim 9, wherein the protective layer is prepared by the following method: dip-coating the hardware with special water-based paint on the surface of the device body and then drying;

Preferably, the drying includes baking;

Preferably, the baking temperature is 130-170°C, preferably 150°C, and the time is 10-30 minutes, preferably 20 minutes.