阅读说明：本技术 一种高性能水性钢桶内壁涂料及其制备方法 (High-performance water-based steel drum inner wall coating and preparation method thereof ) 是由 周国治 杜高平 邢建阳 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种高性能水性钢桶内壁涂料及其制备方法,该高性能水性钢桶内壁涂料包括下列重量份数的原料：改性水性聚酯分散体55-65份；色浆20-30份；水性潜伏型固化剂4-6份；去离子水3-7份；润湿消泡剂0.2-0.5份；反应型助剂0.3-0.5份；防流挂助剂0.5-3份。本发明提供的多官能团改性水性聚酯分散体可以根据实际需求在树脂的架构上接枝功能性官能团的数量,能够达到高性能的要求；本发明产品的涂层硬度很高,重涂性好；本发明产品为了保证水性钢桶涂料的施工性优异,在研磨及调漆阶段分别加入增稠剂及防流挂助剂,保证涂料的流动性良好,同时保证湿膜的流平性及不流挂的特点。(The invention discloses a high-performance water-based steel barrel inner wall coating and a preparation method thereof, wherein the high-performance water-based steel barrel inner wall coating comprises the following raw materials in parts by weight: 55-65 parts of modified aqueous polyester dispersion; 20-30 parts of color paste; 4-6 parts of a waterborne latent curing agent; 3-7 parts of deionized water; 0.2-0.5 part of wetting defoaming agent; 0.3-0.5 part of reactive auxiliary agent; 0.5-3 parts of anti-sagging auxiliary agent. The multifunctional modified waterborne polyester dispersoid provided by the invention can graft the number of functional groups on the framework of resin according to actual requirements, and can meet the requirement of high performance; the product of the invention has high coating hardness and good recoatability; in order to ensure that the workability of the water-based steel barrel coating is excellent, the thickening agent and the anti-sagging auxiliary agent are respectively added in the grinding and paint mixing stages, so that the good fluidity of the coating is ensured, and the leveling property and the non-sagging characteristic of a wet film are ensured.)

1. The high-performance water-based steel drum inner wall coating is characterized by comprising the following raw materials in parts by weight:

2. the high-performance water-based steel drum inner wall coating material as claimed in claim 1, which is characterized by comprising the following raw materials in parts by weight:

3. the high-performance water-based steel drum inner wall coating as claimed in claim 1 or 2, wherein: the modified aqueous polyester dispersion comprises the following raw materials in parts by weight:

4. the high-performance water-based steel drum inner wall coating as claimed in claim 3, wherein: the preparation method of the modified aqueous polyester dispersion comprises the following steps:

1) adding an organic solvent into a reaction kettle, and then adding organic alcohol, organic acid, a catalyst and an antioxidant into the organic solvent; heating the reaction kettle to 150-;

2) cooling the reaction kettle to 170-180 ℃, and then adding a water-based monomer, a siloxane monomer and an isocyanate monomer into the reaction kettle to react for 2-3h to obtain a water-based polyester resin;

3) and reducing the temperature of the reaction kettle to 130-150 ℃, and then adding 5-15 parts of phenolic resin into the reaction kettle for reaction for 1-3 hours to obtain the modified waterborne polyester resin.

5. The high-performance water-based steel drum inner wall coating as claimed in claim 4, wherein: the preparation method of the modified aqueous polyester dispersion comprises the following steps:

1) adding an organic solvent into a reaction kettle, and then adding organic alcohol, organic acid, a catalyst and an antioxidant into the organic solvent; heating the reaction kettle to 160 ℃, introducing nitrogen for protection, carrying out heat preservation reaction for 30min, and finally heating to 180-230 ℃ for reaction for 4-6h to obtain a prepolymer of the polyester resin;

2) cooling the reaction kettle to 170-180 ℃, and then adding a water-based monomer, a siloxane monomer and an isocyanate monomer into the reaction kettle to react for 2-3h to obtain a water-based polyester resin;

3) and (3) reducing the temperature of the reaction kettle to 140 ℃, and then adding 5-15 parts of phenolic resin into the reaction kettle to react for 2 hours to obtain the modified waterborne polyester dispersoid.

6. The high-performance water-based steel drum inner wall coating as claimed in claim 1 or 2, wherein: the color paste comprises the following raw materials in parts by weight:

7. the high-performance water-based steel barrel inner wall coating as claimed in claim 6, wherein the preparation method of the color paste comprises the following steps: the ionic water, the dispersing agent, the defoaming agent, the pigment, the wetting agent and the thickening agent are sequentially put into a stirring cylinder, fully stirred to be uniform slurry at a certain rotating speed and put into a sand mill for grinding for later use.

8. The high-performance water-based steel barrel inner wall coating material as claimed in claim 7, wherein the coating material is fully stirred to be uniform slurry state at the rotating speed of 2000-3000 rpm.

9. The high-performance water-based steel drum inner wall coating as claimed in claim 7, wherein the coating is put into a sand mill and ground until the fineness is less than or equal to 15um for later use.

10. The method for preparing the high-performance water-based steel drum inner wall coating as claimed in claim 1 or 2, which comprises the following steps:

and sequentially putting the modified aqueous polyester dispersoid, the color paste, the aqueous latent curing agent, the deionized water, the wetting defoamer, the reactive additive and the anti-sagging additive into a production cylinder according to the proportion, and stirring the mixture to be in a completely uniform state to obtain the high-performance aqueous steel barrel inner wall coating.

Technical Field

The invention relates to the technical field of coatings, in particular to a high-performance water-based steel drum inner wall coating and a preparation method thereof.

Background

With the enhancement of the public environmental protection consciousness and the continuous promotion of the national environmental protection policy, the environmental protection receives unprecedented attention. As a coating enterprise discharging a large amount of toxic and harmful substances, huge pressure and challenges are faced, and the steel drum manufacturing industry is no exception. With the continuous promotion of the whole society to the low-carbon environment-friendly concept, the water-based environment-friendly paint is bound to become a future development trend, according to relevant research and research, the water-based environment-friendly paint has a great development space, and the research and development of the water-based paint are needed for energy conservation and emission reduction and also for environment protection, air purification and guarantee of human health by replacing oil paint with water. In the steel drum manufacturing industry, under the condition that the outer coating is converted from oil to water, the inner coating also urgently needs to be converted from oil to water.

The water-based steel drum inner wall coating in the prior art has the defects that the water resistance is not ideal enough, and the chemical resistance in the aspects of acid resistance and alkali resistance is not ideal enough. Therefore, it is necessary to optimize and improve it.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a high-performance water-based steel barrel inner wall coating and a preparation method thereof.

In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:

a high-performance water-based steel drum inner wall coating comprises the following raw materials in parts by weight:

further, in the high-performance water-based steel drum inner wall coating, the coating comprises the following raw materials in parts by weight:

further, in the high-performance water-based steel barrel inner wall coating, the modified water-based polyester dispersion comprises the following raw materials in parts by weight:

further, in the high-performance water-based steel barrel inner wall coating, the preparation method of the modified water-based polyester dispersion comprises the following steps:

1) adding an organic solvent into a reaction kettle, and then adding organic alcohol, organic acid, a catalyst and an antioxidant into the organic solvent; heating the reaction kettle to 150-;

2) cooling the reaction kettle to 170-180 ℃, and then adding a water-based monomer, a siloxane monomer and an isocyanate monomer into the reaction kettle to react for 2-3h to obtain a water-based polyester resin;

3) and reducing the temperature of the reaction kettle to 130-150 ℃, and then adding 5-15 parts of phenolic resin into the reaction kettle for reaction for 1-3h to obtain the modified waterborne polyester dispersoid.

Further, in the high-performance water-based steel barrel inner wall coating, the preparation method of the modified water-based polyester dispersion comprises the following steps:

1) adding an organic solvent into a reaction kettle, and then adding organic alcohol, organic acid, a catalyst and an antioxidant into the organic solvent; heating the reaction kettle to 160 ℃, introducing nitrogen for protection, carrying out heat preservation reaction for 30min, and finally heating to 180-230 ℃ for reaction for 4-6h to obtain a prepolymer of the polyester resin;

2) cooling the reaction kettle to 170-180 ℃, and then adding a water-based monomer, a siloxane monomer and an isocyanate monomer into the reaction kettle to react for 2-3h to obtain a water-based polyester resin;

3) and (3) reducing the temperature of the reaction kettle to 140 ℃, and then adding 5-15 parts of phenolic resin into the reaction kettle to react for 2 hours to obtain the modified waterborne polyester resin.

Further, in the high-performance water-based steel barrel inner wall coating, the color paste comprises the following raw materials in parts by weight:

further, in the high-performance water-based steel drum inner wall coating, the preparation method of the color paste comprises the following steps: the ionic water, the dispersing agent, the defoaming agent, the pigment, the wetting agent and the thickening agent are sequentially put into a stirring cylinder, fully stirred to be uniform slurry at a certain rotating speed and put into a sand mill for grinding for later use.

Further, the high-performance water-based steel barrel inner wall coating is fully stirred to be uniform slurry state at the rotating speed of 2000-3000 rpm.

Further, the high-performance water-based steel drum inner wall coating is put into a sand mill to be ground until the fineness is less than or equal to 15um for later use.

The invention also provides a method for preparing the high-performance water-based steel barrel inner wall coating, which comprises the following steps:

and sequentially putting the modified aqueous polyester dispersoid, the color paste, the aqueous latent curing agent, the deionized water, the wetting defoamer, the reactive additive and the anti-sagging additive into a production cylinder according to the proportion, and stirring the mixture to be in a completely uniform state to obtain the high-performance aqueous steel barrel inner wall coating. When the high-performance water-based steel barrel inner wall coating is used for construction, 8-15% of water by weight of the high-performance water-based steel barrel inner wall coating is added for boiling and spraying, and the drying condition is 220-.

The invention has the beneficial effects that:

1. the self-made multifunctional modified waterborne polyester dispersoid can graft the number of functional groups on the framework of the resin according to actual requirements, and can meet the requirement of high performance compared with a simple physical mixing mode in the market.

2. The product of the invention has high coating hardness and good recoatability.

3. In order to ensure that the workability of the water-based steel barrel coating is excellent, the thickening agent and the anti-sagging auxiliary agent are respectively added in the grinding and paint mixing stages, so that the good fluidity of the coating is ensured on one hand, and the leveling property and the non-sagging characteristic of a wet film are ensured on the other hand.

4. The product of the invention can not be added into solvent products all the time in the production process, thereby ensuring lower VOC (VOC is less than or equal to 120 g/L).

Of course, it is not necessary for any one product that embodies the invention to achieve all of the above advantages simultaneously.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A high-performance water-based steel drum inner wall coating comprises the following raw materials in parts by weight:

further, in the high-performance water-based steel barrel inner wall coating, the modified water-based polyester dispersion comprises the following raw materials in parts by weight:

the preparation method of the modified aqueous polyester dispersion comprises the following steps:

1) adding an organic solvent into a reaction kettle, and then adding organic alcohol, organic acid, a catalyst and an antioxidant into the organic solvent; heating the reaction kettle to 160 ℃, introducing nitrogen for protection, carrying out heat preservation reaction for 30min, and finally heating to 200 ℃ for reaction for 5h to obtain a prepolymer of polyester resin;

2) cooling the reaction kettle to 175 ℃, and then adding a water-based monomer, a siloxane monomer and an isocyanate monomer into the reaction kettle to react for 2.5 hours to obtain a water-based polyester resin;

3) and (3) reducing the temperature of the reaction kettle to 140 ℃, and then adding 10 parts of phenolic resin into the reaction kettle to react for 2 hours to obtain the modified waterborne polyester dispersoid.

The color paste comprises the following raw materials in parts by weight:

the preparation method of the color paste comprises the following steps: sequentially putting the ionized water, the dispersing agent, the defoaming agent, the pigment, the wetting agent and the thickening agent into a stirring cylinder, fully stirring at the rotating speed of 2000-3000rpm to uniform slurry, and grinding the slurry in a sand mill until the fineness is less than or equal to 15 microns for later use.

The invention also provides a method for preparing the high-performance water-based steel barrel inner wall coating, which comprises the following steps:

and sequentially putting the modified aqueous polyester dispersoid, the color paste, the aqueous latent curing agent, the deionized water, the wetting defoamer, the reactive additive and the anti-sagging additive into a production cylinder according to the proportion, and stirring the mixture to be in a completely uniform state to obtain the high-performance aqueous steel barrel inner wall coating. When the high-performance water-based steel barrel inner wall coating is used for construction, 8-15% of water by weight is added into the high-performance water-based steel barrel inner wall coating for boiling and spraying, and the drying condition is 220-

The following embodiments are relevant to the present invention:

example 1

A high-performance water-based paint for the inner wall of a steel drum is prepared from modified water-based polyester dispersoid, color paste, water-based latent curing agent, deionized water, wetting defoaming agent, reaction type assistant and anti-sagging assistant through proportioning, sequentially putting into a production cylinder, and stirring to be in a completely uniform state.

The modified aqueous polyester dispersoid comprises the following raw materials in parts by weight: 50 parts of an organic solvent; 20 parts of organic alcohol; 30 parts of organic acid; 0.3 part of a catalyst; 0.1 part of antioxidant;

the color paste comprises the following raw materials in parts by weight: 20 parts of deionized water; 2 parts of a dispersing agent; 0.2 part of defoaming agent; 10 parts of pigment; 0.2 part of wetting agent; 1 part of thickening agent.

When the high-performance water-based steel drum inner wall coating is used for construction, 8 percent of water by weight is added into the high-performance water-based steel drum inner wall coating for boiling and spraying, and the drying condition is 230 ℃/10min

Example 2

A high-performance water-based paint for the inner wall of a steel drum is prepared from modified water-based polyester dispersoid, color paste, water-based latent curing agent, deionized water, wetting defoaming agent, reaction type assistant and anti-sagging assistant through proportioning, sequentially putting into a production cylinder, and stirring to be in a completely uniform state.

The modified aqueous polyester dispersoid comprises the following raw materials in parts by weight: 80 parts of an organic solvent; 35 parts of organic alcohol; 40 parts of organic acid; 0.1 part of catalyst; 0.3 part of antioxidant;

the color paste comprises the following raw materials in parts by weight: 25 parts of deionized water; 10 parts of a dispersing agent; 0.3 part of defoaming agent; 30 parts of pigment; 0.5 part of wetting agent; 2.3 parts of a thickening agent.

When the high-performance water-based steel drum inner wall coating is used for construction, the high-performance water-based steel drum inner wall coating is diluted and sprayed by adding 15% of water by weight per se, and the coating is dried at the drying condition of 220 ℃/10 min.

Example 3

A high-performance water-based paint for the inner wall of a steel drum is prepared from modified water-based polyester dispersoid, color paste, water-based latent curing agent, deionized water, wetting defoaming agent, reaction type assistant and anti-sagging assistant through proportioning, sequentially putting into a production cylinder, and stirring to be in a completely uniform state.

The modified aqueous polyester dispersoid comprises the following raw materials in parts by weight: 65 parts of an organic solvent; 30 parts of organic alcohol; 35 parts of organic acid; 0.2 part of catalyst; 0.2 part of antioxidant;

the color paste comprises the following raw materials in parts by weight: 23 parts of deionized water; 6 parts of a dispersing agent; 0.2 part of defoaming agent; 20 parts of pigment; 0.3 part of wetting agent; 1.5 parts of thickening agent.

When the high-performance water-based steel drum inner wall coating is used for construction, 10% of water by weight of the high-performance water-based steel drum inner wall coating is added for boiling and spraying, and the coating is dried at 225 ℃/10 min.

The invention performs a performance test on the inner wall coating provided by examples 1-3, and the test results are shown in the following table 1:

TABLE 1

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.