阅读说明：本技术 一种水性涂料用抗闪锈剂及其制备方法 (Flash rust resisting agent for water-based paint and preparation method thereof ) 是由 胡鹏程 周树锋 柴瑞敏 赖傲楠 于 2020-07-17 设计创作，主要内容包括：本发明公开了一种水性涂料用抗闪锈剂及其制备方法,由咪唑啉离子液体、三氮唑离子液体、季铵盐离子液体、有机磷酸盐、炔醇和去离子水以20-60∶20-60∶20-60∶4-25∶4-25∶1000的质量比复配而成。本发明容易在金属表面形成均匀致密的吸附膜,有效防止金属表面的电化学腐蚀,起到抑制腐蚀的作用。本发明应用于水性涂料中,抗闪锈性能好且用量少,只需添加0.7-1.2wt％的抗闪锈剂即可保证金属表面不会出现锈点。(The invention discloses an anti-flash rust agent for water-based paint and a preparation method thereof, wherein the anti-flash rust agent is prepared by compounding imidazoline ionic liquid, triazole ionic liquid, quaternary ammonium salt ionic liquid, organic phosphate, alkynol and deionized water according to the mass ratio of 20-60: 4-25: 1000. The invention is easy to form a uniform and compact adsorption film on the metal surface, effectively prevents the electrochemical corrosion of the metal surface and plays a role in inhibiting the corrosion. The invention is applied to the water-based paint, has good flash rust resistance and small using amount, and can ensure that no rust point can appear on the metal surface by only adding 0.7-1.2 wt% of flash rust resistant agent.)

1. An anti-flash rust agent for water-based paint, which is characterized in that: the composite material is prepared by compounding imidazoline ionic liquid, triazole ionic liquid, quaternary ammonium salt ionic liquid, organic phosphate, alkynol and deionized water according to the mass ratio of 20-60: 4-25: 1000, wherein the imidazoline ionic liquid is [ CTA ] [ C1] and/or [ CTA ] [ NSA ], the triazole ionic liquid is [ BTA ] [ C1] and/or [ BTA ] [ NSA ], and the quaternary ammonium salt ionic liquid is [ DSA ] [ C1] and/or [ DSA ] [ NSA ].

2. The flash rust inhibitor for aqueous coating materials according to claim 1, wherein: the alkynol is propiolic alcohol and/or 1, 4-butynediol.

3. The flash rust inhibitor for aqueous coating materials according to claim 1, wherein: the organic phosphate is tetra sodium hydroxyethylidene diphosphonate and/or tetra sodium amino trimethylene phosphonate.

4. The flash rust inhibitor for aqueous coating materials according to claim 1, wherein: the mass ratio of the imidazoline ionic liquid, the triazole ionic liquid, the quaternary ammonium salt ionic liquid, the organic phosphate, the alkynol and the deionized water is 20-50: 5-20: 1000.

5. An agent for preventing flash rust for aqueous paint according to any one of claims 1 to 4, characterized in that: the mass ratio of the organic phosphate to the alkynol is 1: 1.

6. An agent for preventing flash rust for aqueous paint according to any one of claims 1 to 4, characterized in that: the mass ratio of the imidazoline ionic liquid to the triazole ionic liquid to the quaternary ammonium salt ionic liquid is 1: 1.

7. The method for producing the flash rust inhibitor for aqueous coating material according to any one of claims 1 to 6, characterized in that: the method comprises the following steps: sequentially adding the alkynol and the organic phosphate into deionized water, stirring for 0.1-3h at 0-100 ℃, sequentially adding the imidazoline ionic liquid, the triazole ionic liquid and the quaternary ammonium salt ionic liquid, and stirring for 0.1-3h at 0-100 ℃ to obtain the product.

8. An aqueous coating composition characterized by: comprising the flash rust inhibitor for aqueous coating material according to any one of claims 1 to 6 and an aqueous coating material base.

9. An aqueous coating composition according to claim 8, wherein: the content of the flash rust inhibitor for the water-based paint is 0.1-1 wt%.

10. An aqueous coating according to claim 8 or 9, wherein: the water-based paint matrix is at least one of acrylic paint, epoxy resin paint, alkyd paint and polyurethane paint.

Technical Field

The invention belongs to the technical field of organic materials, and particularly relates to an anti-flash rust agent for a water-based paint and a preparation method thereof.

Background

The water-based paint is one of five green paint products which are specified clearly by national standard, and has the characteristics of small environmental hazard, convenient construction, good safety and easy storage and transportation. However, when the water-based paint is used on the surface of steel, the steel surface is very easy to corrode, i.e. flash rust, due to the presence of water and oxygen in the drying process. Especially when the water-based paint is coated on high-carbon steel or iron castings, the problem of flash rust is difficult to avoid. Therefore, adding the flash rust inhibitor into the water-based paint is an important method for solving the problem of flash rust generated in the metal coating process.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the flash rust resisting agent for the water-based paint.

The invention also aims to provide a preparation method of the flash rust inhibitor for the water-based paint.

It is a further object of the present invention to provide an aqueous coating composition.

The technical scheme of the invention is as follows:

an anti-flash rust agent for water-based paint is prepared by compounding imidazoline ionic liquid, triazole ionic liquid, quaternary ammonium salt ionic liquid, organic phosphate, alkynol and deionized water according to the mass ratio of 20-60: 4-25: 1000, wherein the imidazoline ionic liquid is [ CTA ] [ Cl ] and/or [ CTA ] [ NSA ], the triazole ionic liquid is [ BTA ] [ Cl ] and/or [ BTA ] [ NSA ], and the quaternary ammonium salt ionic liquid is [ DSA ] [ Cl ] and/or [ DSA ] [ NSA ].

The imidazoline ionic liquid has the structural formulas of [ CTA ] [ Cl ] and [ CTA ] [ NSA ] as follows:

the structural formulas of the triazole ionic liquid are [ BTA ] [ Cl ] and [ BTA ] [ NSA ] are as follows:

the quaternary ammonium salt ionic liquid has the structural formula shown in the specification of [ DSA ] [ Cl ] and [ DSA ] [ NSA ]:

in a preferred embodiment of the invention, the alkynol is propiolic alcohol and/or 1, 4-butynediol.

In a preferred embodiment of the invention, the organophosphate is tetrasodium hydroxyethylidene diphosphonate and/or tetrasodium aminotrimethylidene phosphonate.

In a preferred embodiment of the invention, the mass ratio of the imidazoline ionic liquid, the triazole ionic liquid, the quaternary ammonium salt ionic liquid, the organic phosphate, the alkynol and the deionized water is 20-50: 5-20: 5-205: 1000.

In a preferred embodiment of the invention, the mass ratio of the organophosphate to the alkynol is 1: 1.

In a preferred embodiment of the invention, the mass ratio of the imidazoline ionic liquid, the triazole ionic liquid and the quaternary ammonium salt ionic liquid is 1: 1.

The preparation method of the flash rust inhibitor for the water-based paint comprises the following steps: sequentially adding the alkynol and the organic phosphate into deionized water, stirring for 0.1-3h at 0-100 ℃, sequentially adding the imidazoline ionic liquid, the triazole ionic liquid and the quaternary ammonium salt ionic liquid, and stirring for 0.1-3h at 0-100 ℃ to obtain the product.

The other technical scheme of the invention is as follows:

an aqueous coating composition comprising the above-mentioned flash rust inhibitor for aqueous coating and an aqueous coating base.

In a preferred embodiment of the present invention, the flash rust inhibitor for aqueous coating materials is contained in an amount of 0.1 to 1% by weight.

In a preferred embodiment of the present invention, the aqueous coating base is at least one of an acrylic coating, an epoxy coating, an alkyd coating, and a polyurethane coating.

The invention has the beneficial effects that:

1. according to the invention, the green ionic liquid is compounded with other specific auxiliary agents, so that the defects of high toxicity and harm to the environment and human bodies of the traditional flash rust inhibitor can be overcome, and the requirements of green and environmental protection are met.

2. The invention is easy to form a uniform and compact adsorption film on the metal surface, effectively prevents the electrochemical corrosion of the metal surface and plays a role in inhibiting the corrosion.

3. The invention is applied to the water-based paint, has good flash rust resistance and small using amount, and can ensure that no rust point can appear on the metal surface by only adding 0.7-1.2 wt% of flash rust resistant agent.

4. The preparation method of the invention has simple synthetic process and low production cost, and is beneficial to industrial popularization.

Detailed Description

The technical solution of the present invention is further illustrated and described by the following detailed description.