阅读说明：本技术 一种水性柳编面漆及其制备方法 (Water-based wicker top coat and preparation method thereof ) 是由 薛小倩 王洁 刘洪亮 楚会来 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种水性柳编面漆及其制备方法,所述水性柳编面漆包括：纳米TiO<Sub>2</Sub>-石墨烯改性核壳型氟碳乳液55-65份,润湿剂0.3-0.5份,分散剂0.4-0.8份,消泡剂0.2-0.4份,钛白粉13-18份,增稠剂0.2-0.8份,流平剂0.2-0.6份,pH调节剂0.1-0.2份,成膜助剂2-3份和植物纯露15-25份。本发明提供的水性柳编面漆,不但具有优异的成膜性能,成膜后漆膜的附着力、耐水性、柔韧性和封闭性俱佳,同时,还具有防腐杀菌、绿色环保的优点,可最大程度的减少对环境的污染和对人体的伤害,具有广阔的应用前景和发展潜力。(The invention discloses a water-based wicker finish and a preparation method thereof, wherein the water-based wicker finish comprises the following components: nano TiO 2 2 55-65 parts of graphene modified core-shell fluorocarbon emulsion, 0.3-0.5 part of wetting agent, 0.4-0.8 part of dispersing agent, 0.2-0.4 part of defoaming agent, 13-18 parts of titanium dioxide, 0.2-0.8 part of thickening agent, 0.2-0.6 part of flatting agent, 0.1-0.2 part of pH regulator, 2-3 parts of film-forming additive and 15-25 parts of plant hydrolat. The water-based wicker top coat provided by the invention has excellent film-forming property, and the film formed by the water-based wicker top coat has good adhesive force, water resistance, flexibility and sealing property, and simultaneously has the functions of corrosion prevention and killingThe method has the advantages of bacteria and environmental protection, can reduce the pollution to the environment and the harm to the human body to the maximum extent, and has wide application prospect and development potential.)

1. The water-based wicker finishing coat is characterized by comprising the following raw material components in parts by mass: nano TiO 2₂55-65 parts of graphene modified core-shell fluorocarbon emulsion, 0.3-0.5 part of wetting agent, 0.4-0.8 part of dispersing agent, 0.2-0.4 part of defoaming agent, 13-18 parts of titanium dioxide, 0.2-0.8 part of thickening agent, 0.2-0.6 part of flatting agent, 0.1-0.2 part of pH regulator, 2-3 parts of film-forming additive and 15-25 parts of plant hydrolat.

2. The aqueous wicker top coat of claim 1, wherein nano-TiO is₂The preparation method of the-graphene modified core-shell fluorocarbon emulsion comprises the following stepsThe method comprises the following steps:

step a, dispersing nano titanium dioxide and graphene in water, adding isomeric tridecyl alcohol sodium sulfate, aminocarboxylic acid and ammonium persulfate, and uniformly mixing to obtain a mixed dispersion liquid; under the protection of inert gas, heating the mixed dispersion to 80-88 ℃, dropwise adding a styrene monomer and an acrylic acid mixed monomer, and preserving heat for 40-50min after dropwise adding to obtain a nano modified nuclear layer emulsion;

b, adding isomeric tridecyl alcohol sodium sulfate and aminocarboxylic acid into the nano modified nuclear layer emulsion, and uniformly mixing to obtain mixed emulsion; heating the mixed emulsion to 85-88 ℃ under the protection of inert gas, dropwise adding acrylic mixed monomer and fluorine-containing monomer, keeping the temperature for reaction for 4-5h after dropwise adding, and adjusting the pH to 7-8 to obtain the nano TiO₂-graphene modified core-shell fluorocarbon emulsion.

3. The water-based wicker top coat as claimed in claim 2, wherein the mass ratio of the nano titanium dioxide to the graphene is 1:0.5-1, the total mass of the nano titanium dioxide and the graphene is 3-6% of the mass of the styrene monomer, and the mass ratio of the total mass of the nano titanium dioxide and the graphene to water is 1.5-6: 1.

4. The water-based wicker top coat as claimed in claim 2, wherein in step a, the mass ratio of the styrene monomer to the acrylic mixed monomer is 1: 7-8; and/or

In the step a, the adding amount of the isomeric tridecyl alcohol sodium sulfate salt is 0.1-0.2% of the mass of the styrene monomer; and/or

In the step a, the adding amount of the aminocarboxylic acid is 0.03-0.12% of the mass of the styrene monomer; and/or

In the step a, the adding amount of the ammonium persulfate is 0.06-0.17% of the mass of the styrene monomer.

5. The water-based wicker top coat as claimed in claim 1, wherein in the step b, the mass ratio of the nano modified core layer emulsion to the acrylic mixed monomer to the fluorine-containing monomer is 1:0.7-0.8: 0.4-0.6; and/or

In the step b, the adding amount of the isomeric sodium tridecyl sulfate is 0.03-0.08 percent of the mass of the nano modified nuclear layer emulsion; and/or

In the step b, the adding amount of the aminocarboxylic acid is 0.03-0.12% of the mass of the nano modified nuclear layer emulsion.

6. The water-based wicker top coat according to any one of claims 2 to 5, wherein the acrylic mixed monomer is a mixture of acrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate and octyl acrylate in a mass ratio of 1:0.7-0.9:0.8-1.0:0.8-1.2: 1.4-1.6.

7. The waterborne wicker top coat of claim 1, wherein the wetting agent is a fatty alcohol alkoxy compound; and/or

The dispersant is a sodium polyacrylate dispersant; and/or

The defoaming agent is polysiloxane-polyether copolymer emulsion or mineral oil defoaming agent.

8. The aqueous wicker top coat of claim 1, wherein the thickener is at least one of hydroxyethyl cellulose or an alkali soluble swelling thickener; and/or

The flatting agent is a polyurethane flatting agent; and/or

The pH regulator is an alcamines organic matter.

9. The waterborne wicker top coat of claim 1, wherein the coalescent is a dodecanol ester; and/or

The plant hydrolat is a mixture of tea plant hydrolat and lavender hydrolat in a mass ratio of 1: 0.8-1.2.

10. A preparation method of water-based wicker finishing paint is characterized by at least comprising the following steps:

weighing the components according to the design proportion of the water-based wicker finish paint of any one of claims 1 to 9, uniformly stirring the weighed plant hydrolat and 40 to 60 weight percent of thickening agent, sequentially adding the weighed pH regulator, wetting agent, dispersant, defoamer and film-forming assistant, uniformly mixing, adding titanium dioxide and nano TiO₂And (3) uniformly mixing the graphene modified core-shell fluorocarbon emulsion, adding a leveling agent and the rest of the thickening agent, and adjusting the stormer viscosity to 25 ℃ to 82-88KU to obtain the water-based wicker finish.

Technical Field

The invention relates to the technical field of coatings, and particularly relates to a water-based wicker finish and a preparation method thereof.

Background

The wicker product has a history of thousands of years in China, has been popular with people since ancient times due to practical properties and beautiful appearance, and even has a adage of 'basket plaiting and basket plaiting, and families', so that the wicker product can be widely applied. The wicker product is mainly woven by raw materials such as wickers, rattans, straws and the like, and the raw materials are easy to corrode in the using process, so that the service life of the wicker product is shortened. Therefore, after the wicker product is finished, a paint layer is generally required to be coated on the surface of the wicker product to protect the surface of the wicker product, so that the service life of the wicker product is prolonged, and meanwhile, the aesthetic feeling of the wicker product can be improved.

The wicker products are generally products contacted by people in a short distance, the conventional paint commonly used in the market at present contains a large amount of toxic substances, and the special paint for the wicker products has higher requirements along with the enhancement of environmental awareness of people. Accordingly, water-based wicker paints are receiving increasing attention. However, the existing commercially available water-based wicker paint is generally single water-based acrylic emulsion paint, the film forming property of the paint is poor, the formed paint film is poor in compactness, low in glossiness and high in water vapor transmission rate, so that the water resistance and the paint film glossiness of the wicker paint are poor, the problems of poor flexibility and poor blocking resistance exist, the wicker paint is easy to fall off when being coated on wicker products, and the attractiveness of the wicker products is affected. Therefore, the development of a water-based paint special for wicker products, which has excellent comprehensive performances such as glossiness, water resistance, blocking resistance and flexibility, is urgently needed.

Disclosure of Invention

Aiming at the problems of low glossiness, poor water resistance, poor blocking resistance and poor flexibility of the existing wicker water paint in the prior art, the invention provides a water-based wicker finish paint and a preparation method thereof.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

the water-based wicker finish paint comprises the following raw material components in parts by mass: nano TiO 2₂55-65 parts of graphene modified core-shell fluorocarbon emulsion, 0.3-0.5 part of wetting agent, 0.4-0.8 part of dispersing agent, 0.2-0.4 part of defoaming agent, 13-18 parts of titanium dioxide, 0.2-0.8 part of thickening agent, 0.2-0.6 part of flatting agent, 0.1-0.2 part of pH regulator, 2-3 parts of film-forming additive and 15-25 parts of plant hydrolat.

Compared with the prior art, the willow provided by the inventionWeaving finish paint, selecting nano TiO with core-shell structure₂The graphene modified core-shell fluorocarbon emulsion is used as a film forming substance, and a core layer and a shell layer of the graphene modified core-shell fluorocarbon emulsion have different glass transition temperatures, so that the film is high in glossiness and good in flexibility and anti-sticking performance after being formed; the drying performance of the paint film is improved by matching with other auxiliary agents (such as a film forming auxiliary agent, a dispersing agent, a wetting agent and the like), and the initial hardness and water resistance of the paint film are obviously improved; the plant hydrolat is added, so that the compatibility among all the components of the coating can be improved, the density and the flexibility of the coating are further improved, the corrosion resistance and the sterilization performance of the coating can be improved, a paint film can emit elegant fragrance, air is purified, and the effects of calming the nerves and refreshing the brain are achieved. The water-based wicker top coat provided by the invention has excellent film forming property, and the film formed by the water-based wicker top coat has good adhesive force, water resistance, flexibility and sealing property, and also has the advantages of corrosion resistance, sterilization and environmental protection, can reduce pollution to the environment and harm to human bodies to the maximum extent, and has wide application prospect and development potential.

Preferably, nano TiO₂The preparation method of the graphene modified core-shell fluorocarbon emulsion comprises the following steps:

step a, dispersing nano titanium dioxide and graphene in water, adding isomeric tridecyl alcohol sodium sulfate, aminocarboxylic acid and ammonium persulfate, and uniformly mixing to obtain a mixed dispersion liquid; under the protection of inert gas, heating the mixed dispersion to 80-88 ℃, dropwise adding a styrene monomer and an acrylic acid mixed monomer, and preserving heat for 40-50min after dropwise adding to obtain a nano modified nuclear layer emulsion;

b, adding isomeric tridecyl alcohol sodium sulfate and aminocarboxylic acid into the nano modified nuclear layer emulsion, and uniformly mixing to obtain mixed emulsion; heating the mixed emulsion to 85-88 ℃ under the protection of inert gas, dropwise adding acrylic mixed monomer and fluorine-containing monomer, keeping the temperature for reaction for 4-5h after dropwise adding, and adjusting the pH to 7-8 to obtain the nano TiO₂-graphene modified core-shell fluorocarbon emulsion.

Preferably, the mass ratio of the nano titanium dioxide to the graphene is 1:0.5-1, the total mass of the nano titanium dioxide and the graphene is 3-6% of the mass of the styrene monomer, and the mass ratio of the total mass of the nano titanium dioxide and the graphene to water is 1.5-6: 1.

Preferably, in the step a, the mass ratio of the styrene monomer to the acrylic mixed monomer is 1: 7-8.

Preferably, in step a, the addition amount of the isomeric sodium tridecyl sulfate is 0.1-0.2% by mass of the styrene monomer.

Preferably, in step a, the amount of the aminocarboxylic acid added is 0.03 to 0.12% by mass of the styrene monomer.

Preferably, the adding amount of the ammonium persulfate is 0.06-0.17% of the mass of the styrene monomer.

Preferably, in the step b, the mass ratio of the nano modified core layer emulsion to the acrylic mixed monomer to the fluorine-containing monomer is 1:0.7-0.8: 0.4-0.6.

Preferably, in the step b, the adding amount of the isomeric sodium tridecanol sulfate is 0.03-0.08% of the mass of the nano modified core-layer emulsion.

Preferably, in the step b, the addition amount of the amino carboxylic acid is 0.03-0.12% of the mass of the nano modified core-layer emulsion.

Preferably, the acrylic mixed monomer is a mixture of acrylic acid, methyl acrylate, ethyl acrylate, butyl acrylate and octyl acrylate in a mass ratio of 1:0.7-0.9:0.8-1.0:0.8-1.2: 1.4-1.6.

Preferably, in step a, the dropping rate of the styrene monomer and the acrylic mixed monomer is 5-8 ml/min.

Preferably, in the step b, the dropping rate of the acrylic mixed monomer and the fluorine-containing monomer is 4-5 ml/min.

According to the invention, through the design of a core-shell structure, structures with different glass transition temperatures are introduced into the fluorocarbon emulsion, the glass transition temperature of a core layer is 0-10 ℃, the glass transition temperature of a shell layer is 40-60 ℃, the modified fluorocarbon emulsion with different glass transition temperatures can obviously improve the flexibility and the blocking resistance of the coating, and the initial hardness and the water resistance are quickly established; and adopts nano TiO₂And graphene para-nuclear layer emulsionThe core-shell structure of the hard core and the soft shell can be obtained by modifying, then the shell layer is prepared by adopting the fluorine monomer, the soft shell can improve the compatibility between the modified fluorocarbon emulsion and other additives, and endow the paint film with good film-forming performance, so that the compactness and flexibility of the paint film are obviously improved, the hard core can improve the hardness and water resistance of the paint film, prevent moisture, oxygen or other corrosive substances from contacting with the wicker product, improve the corrosion resistance of the paint film, and meanwhile, the core layer contains nano titanium dioxide, and can prevent mildew factors such as bacteria from contacting with the wicker product, so that the service life of the wicker product is prolonged. The modified fluorocarbon emulsion prepared by the invention has the advantages that the core-shell structure is designed through the reasonable control of the emulsion structure, so that the overall performance of the emulsion is balanced, and the comprehensive performances such as flexibility, water resistance, blocking resistance and the like are improved on the basis of ensuring the excellent film-forming performance.

The fluorine-containing monomer can be the conventional fluorine-containing monomer in the field, such as trifluoroethyl acrylate, hexafluorobutyl acrylate or dodecafluoroheptyl methacrylate, and the selection of the specific fluorine-containing monomer has no significant influence on the technical effect of the invention.

Preferably, the wetting agent is a fatty alcohol alkoxy compound.

Preferred wetting agents have excellent substrate wetting, excellent flow promotion, high compatibility, and improved scratch resistance, prevent cratering and pigment flooding, and do not produce foam stabilization.

Preferably, the dispersant is a sodium polyacrylate dispersant.

The preferred dispersing agent can enhance the compatibility among the components in the coating, uniformly disperse the components in the coating in a system, and is beneficial to ensuring that the coating is uniformly and firmly attached to a substrate, and the preferred dispersing agent can also enhance the glossiness and the strength of a paint film.

Preferably, the defoamer is a polysiloxane-polyether copolymer emulsion or a mineral oil type defoamer.

The preferable defoaming agent has a lasting defoaming and foam inhibiting effect, has no side effect on the appearance and uniformity of the paint film, and does not cause the phenomenon that fish eyes, craters and the like influence the appearance of the paint film.

Preferably, the thickener is at least one of hydroxyethyl cellulose or alkali-soluble swelling thickener.

Preferred thickeners enhance the rheology and sag resistance of the coating and improve the workability of the coating

Preferably, the leveling agent is a polyurethane leveling agent.

The preferable leveling agent can obviously reduce splashing during construction, and the preferable thickening agent and wetting agent of the invention are matched, so that the film forming property of a paint film can be effectively realized, the paint film is finally ensured to have a perfect leveling effect, and the paint film has a hydrophobic effect, and can keep or even improve the water resistance of the paint film after the paint film is dried.

Preferably, the pH regulator is an alcohol amine organic matter.

The preferable pH regulator not only has the effect of regulating the pH, but also is an organic substance and has certain auxiliary film forming characteristics.

Preferably, the coalescing agent is a dodecanol ester.

The preferred film-forming aids improve the film-forming properties of the paint film, and increase the compactness and gloss of the paint film.

Preferably, the plant hydrolat is a mixture of tea plant hydrolat and lavender hydrolat in a mass ratio of 1: 0.8-1.2. The plant hydrolat is the water phase of corresponding plant after extracting essential oil according to the conventional essential oil extraction method in the prior art, and the change of the extraction condition in the prior range has no obvious influence on the technical effect of the invention.

The tea tree hydrolat and the lavender hydrolat are mixed according to the proportion of 1:0.8-1.2, so that the compatibility among all components of the coating can be remarkably improved, the density and flexibility of the coating are further improved, the anti-corrosion and sterilization performance of the coating can be improved, the coating also has the effects of degrading formaldehyde, toluene and removing various indoor decoration pollutants such as VOCs (volatile organic compounds), and the two are matched to emit elegant fragrance, so that the air can be purified, the nerves can be calmed, the consciousness can be regained, and the health-care performance of the coating is improved.

The invention also provides a preparation method of the water-based wicker top coat, which at least comprises the following steps:

weighing the components according to the design proportion of the water-based wicker finish paint, uniformly stirring the weighed plant hydrolat and 40-60 wt% of thickening agent, sequentially adding the weighed pH regulator, wetting agent, dispersant, defoaming agent and film-forming assistant, uniformly mixing, adding titanium dioxide and nano TiO₂And (3) uniformly mixing the graphene modified core-shell fluorocarbon emulsion, adding a leveling agent and the rest of the thickening agent, and adjusting the stormer viscosity to 25 ℃ to 82-88KU to obtain the water-based wicker finish.

The preparation method is simple to operate, free of complex procedures and special equipment, low in cost and suitable for industrial large-scale production, and the prepared water-based wicker top coat has excellent film-forming performance and good anti-adhesion performance, and the paint film after film forming has good adhesive force, water resistance, flexibility and sealing property, and also has the advantages of corrosion resistance, sterilization and environmental protection, can reduce pollution to the environment and harm to human bodies to the greatest extent, and has wide market prospect.

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. The raw materials which are not specifically described in the following examples are all conventional raw materials in the field and can be obtained through a commercial route, and the specific product type has no significant influence on the technical effect of the invention.