阅读说明：本技术 一种珠光艺术涂料及其制备方法 (Pearlescent art paint and preparation method thereof ) 是由 林金灿 于 2020-07-14 设计创作，主要内容包括：本发明公开了一种珠光艺术涂料,包括基础涂料和珠光填充物；所述基础涂料和珠光填充物的重量比为(1～6)：1。本发明所制备得到的涂料,具有良好的珠光效果,且珠光质感强烈,同时还具有优异的耐水性,晾干后得到珠光艺术涂料涂膜,以手指随机擦拭涂膜,涂膜表面未出现任何粉体掉落现象。(The invention discloses a pearlescent art paint, which comprises a basic paint and a pearlescent filler; the weight ratio of the basic coating to the pearlescent filler is (1-6): 1. the paint prepared by the invention has good pearly luster effect, strong pearly luster texture and excellent water resistance, and a pearly luster artistic paint film is obtained after drying, and the film is randomly wiped by fingers, so that no powder body falling phenomenon occurs on the surface of the film.)

1. The pearlescent art paint is characterized by comprising a basic paint and a pearlescent filler; the weight ratio of the basic coating to the pearlescent filler is (1-6): 1.

2. the pearlescent art paint according to claim 1, wherein the particle size of the pearlescent filler is 10-40 μm.

3. The pearlescent art paint according to claim 1 or 2, wherein the base paint comprises the following raw materials in parts by weight: 150-250 parts of styrene-acrylic emulsion, 2-5 parts of cellulose ether, 1-5 parts of dispersing agent, 1-5 parts of defoaming agent, 10-15 parts of film-forming assistant, 3-8 parts of organic solvent, 400-600 parts of water, 25-35 parts of filler and 12-16 parts of thickening agent.

4. The pearlescent art paint of claim 3, wherein the styrene-acrylic emulsion is selected from one or more of styrene-acrylate emulsion, organosilicon modified styrene-acrylic emulsion, organic fluorine modified styrene-acrylic emulsion, epoxy resin modified styrene-acrylic emulsion and cation styrene-acrylic emulsion.

5. A pearlescent art paint according to claim 3 wherein the dispersant is ammonium polycarboxylate dispersant and/or sodium polycarboxylate dispersant.

6. A pearlescent art paint according to claim 3 wherein the defoaming agent is selected from one or more of mineral oil, vegetable oil and white oil.

7. A pearlescent art paint according to claim 6 wherein the viscosity of the defoaming agent at 25 ℃ is 200 to 1000 cps.

8. A pearlescent art paint according to claim 3 wherein the filler has a particle size of 700 to 900 mesh.

9. A pearlescent art paint according to any one of claims 3-8 wherein the base paint raw material further comprises one or more of preservative, pH regulator, binder, leveling agent, wetting agent, anti-freezing agent, anti-settling agent, anti-mildew agent and colorant.

10. A method for preparing a pearlescent art paint according to any one of claims 1-9, which comprises the following steps: adding the raw materials of the styrene-acrylic emulsion, the cellulose ether, the dispersant, the defoamer, the film forming additive, the organic solvent, the filler, the pearlescent filler, the thickener and the residual basic paint into water, and uniformly stirring to obtain the pearlescent artistic paint.

Technical Field

The invention relates to the field of interior wall coatings, in particular to a pearlescent art coating and a preparation method thereof.

Background

Along with the improvement of living standard of people, the artistic interior wall coating gradually becomes a novel wall decoration artistic material which is popular with consumers due to no toxicity, environmental protection, various appearances and novel decoration styles. The pearlescent art paint is formed by coating mica with a plurality of metal oxide thin layers, and different pearlescent effects are generated by changing the metal oxide thin layers, so that the daily decoration requirements of people are met.

However, the pearlescent art paint on the market at present often has the phenomena that after being dried in the air, the pearlescent powder on the surface of a coating film is easy to fall off, the water resistance is insufficient, and the coating film is easy to whiten when meeting water. Therefore, there is a need to develop a pearlescent art paint with good water resistance and without powder shedding.

Disclosure of Invention

In order to solve the above technical problems, a first aspect of the present invention provides a pearlescent art paint, comprising a base paint and a pearlescent filler; the weight ratio of the basic coating to the pearlescent filler is (1-6): 1.

as a preferable technical scheme, the particle size of the pearlescent filler is 10-40 μm.

As a preferable technical scheme, the basic coating comprises the following raw materials in parts by weight: 150-250 parts of styrene-acrylic emulsion, 2-5 parts of cellulose ether, 1-5 parts of dispersing agent, 1-5 parts of defoaming agent, 10-15 parts of film-forming assistant, 3-8 parts of organic solvent, 400-600 parts of water, 25-35 parts of filler and 12-16 parts of thickening agent.

As a preferable technical scheme, the styrene-acrylic emulsion is selected from one or more of styrene-acrylate emulsion, organic silicon modified styrene-acrylic emulsion, organic fluorine modified styrene-acrylic emulsion, epoxy resin modified styrene-acrylic emulsion and cationic styrene-acrylic emulsion.

As a preferable technical scheme, the dispersant is polycarboxylate dispersant and/or polycarboxylate sodium salt dispersant.

As a preferred technical scheme, the defoaming agent is selected from one or more of mineral oil, vegetable oil and white oil.

As a preferable technical scheme, the viscosity of the defoaming agent at 25 ℃ is 200-1000 cps.

As a preferable technical scheme, the particle size of the filler is 700-900 meshes.

As a preferred technical solution, the raw materials of the base paint further include one or more combinations of preservatives, pH regulators, binders, leveling agents, wetting agents, anti-freezing agents, anti-settling agents, mildewcides and colorants.

The third aspect of the invention provides a preparation method of the pearlescent art paint, which comprises the following steps: adding the raw materials of the styrene-acrylic emulsion, the cellulose ether, the dispersant, the defoamer, the film forming additive, the organic solvent, the filler, the pearlescent filler, the thickener and the residual basic paint into water, and uniformly stirring to obtain the pearlescent artistic paint.

Has the advantages that: the coating prepared from the base coating consisting of the styrene-acrylic emulsion, the cellulose ether, the dispersant, the thickener, the filler and the auxiliary agent and the pearlescent filler has a good pearlescent effect, strong pearlescent texture and excellent water resistance, a pearlescent artistic coating film is obtained after air drying, the coating film is randomly wiped by fingers, and no powder falling phenomenon occurs on the surface of the coating film.

Detailed Description

The technical features of the technical solutions provided by the present invention are further clearly and completely described below with reference to the specific embodiments, and the scope of protection is not limited thereto.

The words "preferred", "more preferred", and the like, in the present invention refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.

In order to solve the above technical problems, a first aspect of the present invention provides a pearlescent art paint comprising a base paint and a pearlescent filler.

In a preferred embodiment, the weight ratio of the base paint to the pearlescent filler is (1-6): 1.

in a more preferred embodiment, the weight ratio of the base paint to the pearlescent filler is 3: 1.

(Pearl filling)

A pearlescent filler, i.e., a pearlescent pigment, is a filler having a pearlescent effect. The pearl coating is formed by coating mica with a plurality of metal oxide thin layers, and different pearl effects can be generated by changing the metal oxide thin layers.

In a preferred embodiment, the particle size of the pearlescent filler is 10 to 40 μm.

In a more preferred embodiment, the particle size of the pearlescent filler is 25 μm.

(base paint)

In a preferred embodiment, the base coating comprises the following raw materials in parts by weight: 150-250 parts of styrene-acrylic emulsion, 2-5 parts of cellulose ether, 1-5 parts of dispersing agent, 1-5 parts of defoaming agent, 10-15 parts of film-forming assistant, 3-8 parts of organic solvent, 400-600 parts of water, 25-35 parts of filler and 12-16 parts of thickening agent.

In a more preferred embodiment, the base coating comprises the following raw materials in parts by weight: 200 parts of styrene-acrylic emulsion, 3 parts of cellulose ether, 3 parts of dispersing agent, 3 parts of defoaming agent, 12 parts of film-forming assistant, 5 parts of organic solvent, 505 parts of water, 30 parts of filler and 15 parts of thickening agent.

Styrene-acrylic emulsion

Styrene-acrylic emulsion is a series of polymerized emulsion and modified emulsion thereof, which are obtained by emulsion copolymerization of styrene and acrylic ester monomers.

In a preferred embodiment, the styrene-acrylic emulsion is selected from one or more of styrene-acrylate emulsion, organic silicon modified styrene-acrylic emulsion, organic fluorine modified styrene-acrylic emulsion, epoxy resin modified styrene-acrylic emulsion and cationic styrene-acrylic emulsion.

In a more preferred embodiment, the styrene-acrylic emulsion is a styrene-acrylate emulsion.

In a preferred embodiment, the styrene-acrylate emulsion has a viscosity of 300 to 2000cps at 25 ℃.

The cps, i.e., centipoise, is a brookfield viscosity unit, 1cps corresponds to 1 mPa-s; the method of measurement used in the present invention is not particularly limited, and various viscosity measurement methods known to those skilled in the art, such as a rotational viscometer method, can be used.

The styrene-acrylate emulsion is a polymerization emulsion obtained by emulsion copolymerization of styrene and acrylate monomers, the solid content is 48 wt%, and the pH value is 7.5; it is commercially available, for example, from Bardful corporation under the model number RS-5969, and has a viscosity of 300 to 2000cps (average viscosity of 1150cps) at 25 ℃.

Cellulose ethers

Cellulose Ether, known by the english name Cellulose Ether, is a Cellulose Ether derivative formed by replacing the hydrogen in the hydroxyl group with a hydrocarbon group, wherein each glucosyl ring of Cellulose macromolecules contains three hydroxyl groups, a primary hydroxyl group on the sixth carbon atom and secondary hydroxyl groups on the second and third carbon atoms.

Examples of cellulose ethers include, but are not limited to: methyl cellulose, hydroxyethyl methyl cellulose, carboxymethyl cellulose, ethyl cellulose, benzyl cellulose, hydroxyethyl cellulose, hydroxypropyl methyl cellulose, cyanoethyl cellulose, benzyl cyanoethyl cellulose, carboxymethyl hydroxyethyl cellulose, phenyl cellulose.

In a more preferred embodiment, the cellulose ether is hydroxyethyl cellulose.

The hydroxyethylcellulose is commercially available, for example, from NATROSOL250HBR, Ashland USA.

Dispersing agent

The dispersant is a substance added into the system to enable the system to form a uniform suspension.

In a preferred embodiment, the dispersant is an ammonium polycarboxylate dispersant and/or a sodium polycarboxylate dispersant.

In a more preferred embodiment, the dispersant is a sodium polycarboxylate dispersant.

The sodium polycarboxylate dispersants of the present invention are available commercially, for example, from Santa Nordisk, Inc. under the CAS number 62601-60-9, model SN-DEFAOAMER 5040.

Defoaming agent

An antifoaming agent is a substance that reduces the surface tension of water, solutions, suspensions, etc., prevents the formation of foam, or reduces or eliminates the original foam.

In a preferred embodiment, the antifoaming agent is selected from the group consisting of mineral oil, vegetable oil, white oil, and combinations thereof.

In a preferred embodiment, the defoamer has a viscosity of 200 to 1000cps at 25 ℃.

In a more preferred embodiment, the defoamer has a viscosity of 600cps at 25 ℃.

In a more preferred embodiment, the defoamer is a mineral oil.

The mineral oil according to the invention is a mixture of refined liquid hydrocarbons obtained from petroleum, mainly a mixture of saturated naphthenic and paraffinic hydrocarbons, which is commercially available, for example from solvay de-foaming agent Rhodoline DF 691.

Film forming aid

The film forming assistant is one kind of additive capable of promoting the plastic flow and elastic deformation of emulsion colloidal particle and improving its coalescence and capable of forming film in wide application temperature range.

Examples of coalescents include, but are not limited to: ester alcohol twelve, ethylene glycol butyl ether, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol butyl ether, dipropylene glycol monomethyl ether, propylene glycol phenyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monobutyl ether, tripropylene glycol n-butyl ether.

In a preferred embodiment, the coalescent ester alcohol twelve (CAS number 25265-77-4).

Organic solvent

The organic solvent is used for softening or dissolving the emulsion particles and promoting the film formation of the emulsion paint by cooperating with the film-forming auxiliary agent.

Examples of organic solvents include, but are not limited to: propanol, benzyl alcohol, ethylene glycol, propylene glycol, and hexylene glycol.

In a preferred embodiment, the organic solvent is ethylene glycol.

In a preferred embodiment, the ethylene glycol is a polyester grade ethylene glycol.

The terylene grade glycol, namely the glycol with the concentration of 99.9 percent, is colorless and odorless liquid with sweet taste; it is commercially available, for example, from Shanghai Yongeng chemical technology, Inc.

Filler material

In a preferred embodiment, the filler is an inorganic filler.

Examples of inorganic fillers include, but are not limited to: titanium dioxide, talcum powder, calcium carbonate, mica powder, barium sulfate, kaolin, white carbon black and wollastonite.

In a preferred embodiment, the filler is mica powder.

In a preferred embodiment, the filler has a particle size of 700 to 900 mesh.

In a more preferred embodiment, the filler has a particle size of 800 mesh.

Thickening agent

In a preferred embodiment, the thickener is an acrylic thickener.

In a preferred embodiment, the acrylic thickener is an acrylic acid base swelling thickener.

In a preferred embodiment, the acrylic thickener has a viscosity of 5 to 15cps at 25 ℃.

In a more preferred embodiment, the acrylic thickener has a viscosity of 10cps at 25 ℃.

The acrylic thickener is commercially available, for example, from Guangzhou Meichen materials technology, Inc. under the model ASE-60, with a viscosity of 10cps at 25 deg.C.

In a preferred embodiment, the weight ratio of the cellulose ether, the thickener and the dispersant is 1: (3-8): (0.5 to 1.5).

In a more preferred embodiment, the weight ratio of the cellulose ether, the thickener and the dispersant is 1: 5: 1.

in a preferred embodiment, the raw materials of the base paint further comprise one or more combinations of preservatives, pH adjusters, binders, leveling agents, wetting agents, anti-freezing agents, anti-settling agents, anti-mildew agents, and coloring agents.

In a more preferable embodiment, the raw materials of the base paint further comprise 1-3 parts of a preservative and 1-3 parts of a pH regulator.

In a further preferred embodiment, the raw materials of the base paint further include 2 parts of a preservative and 2 parts of a pH adjuster.

The preservative used in the present invention is not particularly limited, and various preservatives known to those skilled in the art, such as cason preservative; the pH adjusting agent used in the present invention is not particularly limited, and various pH adjusting agents known to those skilled in the art, such as Angus AMP-95 of Dow, USA, can be used.

The third aspect of the invention provides a preparation method of the pearlescent art paint, which comprises the following steps: adding the raw materials of the styrene-acrylic emulsion, the cellulose ether, the dispersant, the defoamer, the film forming additive, the organic solvent, the filler, the pearlescent filler, the thickener and the residual basic paint into water, and uniformly stirring to obtain the pearlescent artistic paint.

In a preferred embodiment, the preparation method of the pearlescent art paint comprises the following steps: dividing the water into two parts by weight, adding the cellulose ether into the first part of water, stirring, adding the pH regulator, stirring, sequentially adding the dispersant, the defoamer, the film-forming aid, the organic solvent and the preservative, stirring, adding the filler, the styrene-acrylic emulsion and the pearlescent filler, stirring, and adding the thickener, the second part of water and the raw materials of the residual basic paint to obtain the pearlescent artistic paint.

In a more preferred embodiment, the preparation method of the pearlescent art paint comprises the following steps: dividing the water into two parts by weight, adding the cellulose ether into the first part of water, stirring for 10min, adding the pH regulator, stirring for 10min, sequentially adding the dispersant, the defoamer, the film-forming aid, the organic solvent and the preservative, stirring for 10min, then adding the filler, the styrene-acrylic emulsion and the pearlescent filler, stirring for 10min, and then adding the thickener, the second part of water and the raw materials of the residual base paint to obtain the pearlescent artistic paint.

The method for applying the pearlescent art paint of the present invention is not particularly limited, and various methods known to those skilled in the art for applying the pearlescent art paint can be used, for example, after the paint is applied to a substrate, a sander can be used to grind out a texture effect, or a sponge is used to beat and extrude the texture effect.

In a preferred embodiment, the viscosity of the pearlescent art paint is 100 to 150 KU.

In a more preferred embodiment, the pearlescent art paint has a viscosity of 130 KU.

The KU is a viscosity value unit for paint, and the method for measuring the viscosity of KU is not particularly limited, and various methods for measuring the viscosity of KU, which are well known to those skilled in the art, such as the stormer viscometer method, may be used.

In a preferred embodiment, the weight ratio of the first part of water to the second part of water is (11-13): 1.

in a more preferred embodiment, the weight ratio of the first and second parts of water is 12.7: 1.

the inventor unexpectedly discovers that when the pearlescent filler with a certain proportion and a certain particle size is used, the styrene-acrylic emulsion with specific viscosity and the mineral oil defoamer are used, and the cellulose ether, the acrylic acid thickener and the sodium polycarboxylate dispersant are matched in a certain proportion, the prepared paint has a good pearlescent effect, the water resistance is remarkably improved, and the pearlescent filler and the filler are not easy to fall off powder. The inventor believes that, on one hand, in a certain proportion of cellulose ether, acrylic acid thickener and sodium polycarboxylate dispersant, the group on the main chain of the comb-shaped structure of the sodium polycarboxylate dispersant can adsorb the charged particles of the styrene-acrylic emulsion and the acrylic acid thickener, and the steric hindrance of the rigid branch promotes the uniform dispersion of the pearlescent filler, the filler and other components in the system to a certain extent, so as to form a uniform system; on the other hand, the hydrophobic side chain of the acrylic thickener and the special groups of the hydroxyethyl cellulose can also form a hydrogen bond and Van der Waals force association network structure with the styrene-acrylic emulsion colloidal particles, the pearlescent filler and the filler, and the pearlescent filler and the filler coated in the association network structure with different particle sizes and proportions are matched with the styrene-acrylic emulsion and the mineral oil defoamer with specific viscosity, so that the defects of gaps, cavities and the like in the association network structure can be further filled, the water resistance in the system is improved, and the pearlescent filler and the filler are not easy to cause the phenomenon of powder falling. However, when the amount of the acrylic acid thickener or the cellulose ether is too large, the acrylic acid thickener or the cellulose ether is excessively adsorbed to the pearlescent filler and the filler, so that the system is agglomerated, and otherwise, the filler and the pearlescent filler are easy to cause a powder falling phenomenon. When the sodium polycarboxylate dispersant is too much or the viscosity of the styrene-acrylic emulsion and the mineral oil defoamer is too high, the components in the system are difficult to be uniformly dissolved in water, otherwise, the powder falling phenomenon of the filler and the pearlescent filler is easy to occur.

The present invention will now be described in detail by way of examples, and the starting materials used are commercially available unless otherwise specified.