阅读说明：本技术 一种高防腐性环保低耗水性乳液和水性涂料及其制备方法 (High-corrosion-resistance environment-friendly low-consumption water-based emulsion and water-based paint and preparation method thereof ) 是由 肖磊 邹国平 于 2019-10-16 设计创作，主要内容包括：本发明属于涂料制备技术领域,公开了一种高防腐性环保低耗水性乳液和水性涂料及其制备方法,水性乳液含有单体和中间体,单体由丙烯酸、甲基丙烯酸酯、苯乙烯、甲基丙烯酸-2-羟基乙酯、烯烃、甲基丙烯酸、丙烯腈及丙烯酰胺组成；中间体由水性交联剂、水性成膜助剂、水性防腐阻剂、水性附着力促进剂组成。本发明不依赖或局限于水性功能化的单体,从而拓宽了原材料的选择,降低了生产成本。本发明因不用易燃易爆的有机溶剂和无需在高温高压下操作,所以大大减少了运输、贮存和生产过程中所需的安保费用。本发明可运用传统的树脂及涂料生产线,不需更多的投入。本发明圆满地解决了这一类产品存在的性能不理想、成本高、推广受限的问题。(The invention belongs to the technical field of paint preparation, and discloses a high-corrosion-resistance environment-friendly low-consumption water-based emulsion and a water-based paint and a preparation method thereof, wherein the water-based emulsion contains a monomer and an intermediate, and the monomer consists of acrylic acid, methacrylate, styrene, 2-hydroxyethyl methacrylate, olefin, methacrylic acid, acrylonitrile and acrylamide; the intermediate consists of a water-based cross-linking agent, a water-based film-forming assistant, a water-based anti-corrosion inhibitor and a water-based adhesion promoter. The invention does not depend on or is limited to the water-based functionalized monomer, thereby widening the selection of raw materials and reducing the production cost. The invention does not use inflammable and explosive organic solvent and does not need to operate under high temperature and high pressure, thereby greatly reducing the security cost required in the processes of transportation, storage and production. The invention can use the traditional resin and paint production line without more investment. The invention satisfactorily solves the problems of non-ideal performance, high cost and limited popularization of the products.)

1. The aqueous emulsion is characterized by comprising monomers and intermediates, wherein the monomers consist of the following raw materials in parts by weight:

acrylate ester: 10-30 parts of methacrylate: 5-30 parts, 10-40 parts of styrene, 5-20 parts of methacrylic acid-2-hydroxyethyl ester and olefin: 5-20 parts of methacrylic acid, 1-5 parts of acrylonitrile and 1-5 parts of acrylamide;

the intermediate comprises the following raw materials in parts by weight:

5-15 parts of common water-based cross-linking agent, 1-5 parts of common water-based film forming assistant, 0.1-3 parts of common water-based anti-corrosion inhibitor and 2-15 parts of common water-based adhesion promoter.

2. A method of preparing the aqueous emulsion of claim 1, comprising:

1) dissolving the monomer and the intermediate: firstly, the following monomers are prepared: acrylate, methacrylate, styrene, 2-hydroxyethyl methacrylate, olefin, methacrylic acid, acrylonitrile and acrylamide were mixed to obtain a monomer mixture, and the following intermediates were added: mixing a common water-based crosslinking agent, a common water-based film forming aid, a common water-based anti-corrosion agent and a common water-based adhesion promoter to obtain an intermediate mixture, and then pouring the monomer mixture into the intermediate mixture to stir so as to dissolve the monomer and the intermediate together to obtain a dissolved substance.

2) Dissolving common surfactant in water, slowly adding the above dissolved matter, phase-converting, stirring, filtering to obtain metastable initial emulsion.

3) And stirring the metastable initial emulsion at high speed, and adding ultrasonic oscillation until 100-500 nanometer stable emulsion is formed.

4) Heating the stable nano-scale emulsion, introducing nitrogen, dissolving a common initiator into water, dropwise adding the heated stable nano-scale emulsion, continuing the reaction for one hour, cooling, namely polymerizing under the protection of nitrogen, and filtering to obtain a final product: an aqueous emulsion.

3. A water-based paint for plastic decoration prepared by the water-based emulsion of claim 1 is characterized by comprising the following raw materials in parts by weight:

70-90 parts of water-based emulsion, common water-based defoaming agent: 0.01 to 0.5 portion, 1 to 5 portions of carbon black, 0.01 to 0.5 portion of common water-based flatting agent, 0.1 to 1 portion of common water-based thickening agent and 5 to 20 portions of common water-based isocyanate crosslinking agent.

4. A method for preparing a water based paint for plastic decoration according to claim 3, wherein the method for preparing the water based paint for plastic decoration comprises:

and mixing the water-based emulsion with a common water-based defoaming agent, carbon black, a common water-based leveling agent and a common water-based thickening agent, stirring, then filling a common water-based isocyanate crosslinking agent, and stirring for 10-20 minutes to obtain the water-based paint for plastic decoration.

5. A water-based paint for metal antirust paint prepared by using the water-based emulsion of claim 1, which is characterized by comprising the following raw materials in parts by weight:

90-95 parts of water-based emulsion, 0.01-0.5 part of common water-based defoaming agent, 1-5 parts of carbon black, 0.01-0.5 part of common water-based flatting agent and 0.1-1 part of common water-based thickener.

6. The method for producing the water-based paint for metal anticorrosive paint according to claim 5, wherein the water-based paint for plastic decoration is produced by mixing the water-based emulsion with a conventional water-based defoaming agent, carbon black and a conventional water-based leveling agent, stirring, adding a conventional water-based thickener, and stirring for 10 to 20 minutes.

Technical Field

The invention belongs to the technical field of paint preparation, and particularly relates to a high-corrosion-resistance environment-friendly low-consumption water-based emulsion, a water-based paint and a preparation method thereof.

Background

Currently, the closest prior art:

coatings have been widely used in industry, home, and business as decorative or protective layers, which are closely related to people's daily lives. Since the conventional solvent-based coating contains about 30-50% of organic solvent, a large amount of VOC (volatile organic compounds) is released into the atmosphere during the manufacture and construction of the coating, and the volatile solvent discharged into the atmosphere directly threatens the health of human beings and other living beings.

In order to protect the environment in which human beings rely on survival, many countries represented by developed countries have increasingly strict restrictions on solvent-based coatings, and thus the development of coatings is promoted toward "green coatings" or "environmentally friendly coatings" that do not cause harm to the ecological environment and do not have negative effects on human health. Environmental regulations have been established in countries such as the United states, Europe, Japan, and the like, and strict VOC emission standards have been established, and most typically, German atmosphere cleanup laws.

The coating is an important engineering material matched with each part of national economy and national defense industry, and the rapid development of modern high technology represented by scientific technologies such as information life, new energy, renewable energy, environmental protection, new materials, oceans and the like provides various special requirements for the matched coating industry. Functional coatings are an important branch of coatings, and relate to the industries of aerospace, aviation, nuclear industry, marine industry, electronic transportation, building and the like, functional materials comprise waterproof, marine anticorrosion, mildew-proof, wear-resistant, high-temperature-resistant, high-grade decoration and the like, and the development and application of water-based functional coatings are imminent.

Compared with organic solvent type coatings and water-based coatings, the organic solvent type coatings are often better in performance, and the water-based coatings are required to be specially improved or improved in film-forming resin, coating component structures and preparation methods through multiple working procedures, so that technical difficulty is increased and production cost is increased. For example: for plastic coatings, no really effective water-based plastic coating has good adhesive force at home, most water-based plastic coatings are imported abroad, and at present, in order to increase the adhesive force of the water-based plastic coating on plastics, the common method is to pretreat the surface of the plastics, such as: thermal, electro-or chemical oxidation of the plastic surface or application of a thin adhesive layer, etc., which greatly increase the production costs and extend the production cycle, and most of these surface pretreatments decrease the actual effect with increasing standing time.

In summary, the problems of the prior art are as follows:

in the conventional resin hybridization, the modification is mostly carried out in a solvent, and the used solvent usually needs to be distilled by high temperature or vacuum or remains in the resin as VOC of a coating, so that the environmental pollution is caused.

Currently, resin modification is also performed in the prior art to simplify the disposable coating, but most resin modifications add complexity to the resin production, which greatly increases the cost of the resin, and often the molecular properties are reduced by half or completely lost once the effective monomer is attached to the main body of the resin, because the effective monomer loses the chance of being free once it is fixed to the main body. The surface protection effect of the coating cannot be effectively realized.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a high-corrosion-resistance environment-friendly low-consumption water-based emulsion, a water-based paint and a preparation method thereof.

The first object of the present invention is to provide an aqueous emulsion which is used as an intermediate for aqueous coating materials and has excellent properties.

The second purpose of the invention is to provide a water-based paint with high corrosion resistance, environmental protection and low consumption.

The third purpose of the invention is to provide a preparation method of the aqueous emulsion.

The fourth purpose of the invention is to provide a preparation method of the water-based paint, which has the advantages of simple preparation method, production time saving and production cost reduction.

The invention is achieved by an aqueous emulsion comprising monomers and intermediates, wherein:

the monomer consists of the following raw materials in parts by weight:

acrylate ester: 10-30 parts of methacrylate: 5-30 parts of styrene: 10-40 parts, 5-20 parts of methacrylic acid-2-hydroxyethyl ester, and olefin: 5-20 parts of methacrylic acid, 1-5 parts of acrylonitrile and 1-5 parts of acrylamide.

The intermediate consists of the following raw materials in parts by weight:

5-15 parts of common water-based cross-linking agent, common water-based film-forming assistant: 1 to 5 portions of common water-based anti-corrosion agent, 0.1 to 3 portions of common water-based adhesion promoter and 2 to 15 portions of common water-based adhesion promoter.

The invention also aims to provide a water-based paint for plastic decoration, which consists of the following raw materials in parts by weight:

70-90 parts of water-based emulsion, common water-based defoaming agent: 0.01-0.5 part, 1-5 parts of carbon black, 0.01-0.5 part of common water-based flatting agent, 0.1-1 part of common water-based thickening agent and 5-20 parts of common water-based isocyanate crosslinking agent.

The invention also aims to provide a water-based paint for metal antirust paint, which consists of the following raw materials in parts by weight: 90-95 parts of water-based emulsion, 0.01-0.5 part of common water-based defoaming agent, 1-5 parts of carbon black, 0.01-0.5 part of common water-based flatting agent and 0.1-1 part of common water-based thickener.

Another object of the present invention is to provide a method for preparing an aqueous emulsion, comprising:

1) dissolving the monomer and the intermediate: firstly, the following monomers are prepared: acrylate, methacrylate, styrene, 2-hydroxyethyl methacrylate, olefin, methacrylic acid, acrylonitrile and acrylamide were mixed to obtain a monomer mixture, and the following intermediates were added: mixing a common water-based crosslinking agent, a common water-based film forming aid, a common water-based anti-corrosion agent and a common water-based adhesion promoter to obtain an intermediate mixture, and then pouring the monomer mixture into the intermediate mixture to stir so as to dissolve the monomer and the intermediate together to obtain a dissolved substance.

2) Dissolving common surfactant in water, slowly adding the above dissolved matter, phase-converting, stirring, filtering to obtain metastable initial emulsion.

3) And stirring the metastable initial emulsion at high speed, and adding ultrasonic oscillation until 100-500 nanometer stable emulsion is formed.

4) Heating the stable nano-scale emulsion, introducing nitrogen, dissolving a common initiator into water, dropwise adding the heated stable nano-scale emulsion, continuing the reaction for one hour, cooling, namely polymerizing under the protection of nitrogen, and filtering to obtain a final product: an aqueous emulsion.

The invention also provides a preparation method of the water-based paint for plastic decoration, which comprises the steps of mixing the water-based emulsion with a common water-based defoaming agent, carbon black, a common water-based leveling agent and a common water-based thickening agent, stirring, then filling a common water-based isocyanate crosslinking agent, and stirring for 10-20 minutes to obtain the water-based paint for plastic decoration.

The invention also provides a preparation method of the water-based paint for the metal antirust paint, which comprises the steps of mixing the water-based emulsion with the common water-based defoaming agent, the carbon black and the common water-based leveling agent, stirring, then adding the common water-based thickening agent, and stirring for 10-20 minutes to obtain the water-based paint for the metal antirust paint.

In summary, the advantages and positive effects of the invention are:

the invention disperses medium emulsion particles in water by means of shearing force, the dispersed emulsion particles are between 100 nm and 500nm, the emulsion particles can be directly used for manufacturing various water-based functional coatings or after polymerization, the emulsions comprise acrylic acid, epoxy, alkyd, phenolic resin, polyurethane and rubber, and hybrids thereof, and can be used for preparing single-component and double-component water-based functional coatings for metal corrosion prevention and plastic decoration, particularly comprising single-component metal corrosion prevention baking paint, high-adhesion monolayer plastic finish paint and the like.

The invention adopts a high-tech resin production process to physically and chemically modify resin so as to improve the performance of the coating on the surface of a coating. Taking the preparation of the water-based paint for plastic decoration as an example, the water-based resin is produced by the technology and is prepared into the water-based plastic paint, and the special function of the water-based resin is only utilized to improve the adhesive force on the surface of the plastic without any treatment on the surface of a coating in the coating process

In the process of producing the water-based resin, the invention improves and simplifies the traditional water-based resin hybridization and modification process, reduces the use of solvent and can produce the zero-VOC water-based hybrid resin.

The invention does not depend on or is limited to the water-based functionalized monomer, thereby widening the selection of raw materials and reducing the production cost.

The invention does not use inflammable and explosive organic solvent and does not need to operate under high temperature and high pressure, thereby greatly reducing the security cost required in the processes of transportation, storage and production.

The invention can use the traditional resin and paint production line without more investment.

Therefore, the invention satisfactorily solves the problems of non-ideal performance, high cost and limited popularization and use of the products.

Drawings

FIG. 1 is a flow chart of a preparation method of the high-corrosion-resistance environment-friendly low-consumption water-based emulsion and the water-based paint provided by the embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the conventional resin hybridization, the modification is mostly carried out in a solvent, and the used solvent usually needs to be distilled by high temperature or vacuum or remains in the resin as VOC of a coating, so that the environmental pollution is caused. Currently, resin modification is also performed in the prior art to simplify the disposable coating, but most resin modifications add complexity to the resin production, which greatly increases the cost of the resin, and often the molecular properties are reduced by half or completely lost once the effective monomer is attached to the main body of the resin, because the effective monomer loses the chance of being free once it is fixed to the main body. The surface protection effect of the coating cannot be effectively realized.

Aiming at the problems in the prior art, the invention provides a high-corrosion-resistance environment-friendly low-consumption water-based emulsion and water-based paint and a preparation method thereof, and the invention is described in detail below with reference to the accompanying drawings.

Another object of the present invention is to provide an aqueous emulsion comprising monomers and intermediates, wherein:

the monomer consists of the following raw materials in parts by weight:

acrylate ester: 10-30 parts of methacrylate: 5-30 parts of styrene: 10-40 parts, 5-20 parts of methacrylic acid-2-hydroxyethyl ester, and olefin: 5-20 parts of methacrylic acid, 1-5 parts of acrylonitrile and 1-5 parts of acrylamide.

The intermediate consists of the following raw materials in parts by weight:

5-15 parts of common water-based cross-linking agent, common water-based film-forming assistant: 1 to 5 portions of common water-based anti-corrosion agent, 0.1 to 3 portions of common water-based adhesion promoter and 2 to 15 portions of common water-based adhesion promoter.

The invention provides a water-based paint for plastic decoration, which consists of the following raw materials in parts by weight:

70-90 parts of water-based emulsion, common water-based defoaming agent: 0.01-0.5 part, 1-5 parts of carbon black, 0.01-0.5 part of common water-based flatting agent, 0.1-1 part of common water-based thickening agent and 5-20 parts of common water-based isocyanate crosslinking agent.

The invention provides a water-based paint for metal antirust paint, which comprises the following raw materials in parts by weight: 90-95 parts of water-based emulsion, 0.01-0.5 part of common water-based defoaming agent, 1-5 parts of carbon black, 0.01-0.5 part of common water-based flatting agent and 0.1-1 part of common water-based thickener.

As shown in fig. 1, the present invention provides a method for preparing an aqueous emulsion, comprising:

s101, dissolving monomers and intermediates: firstly, the following monomers are prepared: acrylate, methacrylate, styrene, 2-hydroxyethyl methacrylate, olefin, methacrylic acid, acrylonitrile and acrylamide were mixed to obtain a monomer mixture, and the following intermediates were added: mixing a common water-based crosslinking agent, a common water-based film forming aid, a common water-based anti-corrosion agent and a common water-based adhesion promoter to obtain an intermediate mixture, and then pouring the monomer mixture into the intermediate mixture to stir so as to dissolve the monomer and the intermediate together to obtain a dissolved substance.

S102, dissolving a common surfactant in water, slowly adding the dissolved substances, carrying out phase inversion, stirring, and filtering to obtain a metastable initial emulsion.

S103, stirring the metastable state initial emulsion at a high speed, and adding ultrasonic oscillation until 100-500 nanometer stable state emulsion is formed.

S104, heating the stable nano-scale emulsion, introducing nitrogen, dissolving a common initiator into water, dropwise adding the heated stable nano-scale emulsion, continuing the reaction for one hour, cooling, namely polymerizing under the protection of nitrogen, and filtering to obtain a final product: an aqueous emulsion.

The invention is further described with reference to specific examples.