CN107903739B - Varnish with high surface tension and preparation method thereof - Google Patents
Varnish with high surface tension and preparation method thereof Download PDFInfo
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- CN107903739B CN107903739B CN201711274457.1A CN201711274457A CN107903739B CN 107903739 B CN107903739 B CN 107903739B CN 201711274457 A CN201711274457 A CN 201711274457A CN 107903739 B CN107903739 B CN 107903739B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention provides a varnish with high surface tension and a preparation method thereof. The varnish comprises the following components: the paint comprises acrylic resin, wax emulsion, a defoaming agent, a wetting agent, a modifier, absolute ethyl alcohol and deionized water, wherein the defoaming agent is one or two of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether, the wetting agent is polyoxyethylene alkylated ether, and the modifier is aluminum oxide or fumed silica; according to the preparation method, the nano-alumina or fumed silica is added into the acrylic resin varnish as a modifier, the prepared varnish has high surface tension, the ink can be effectively prevented from falling off, and the varnish also has good smoothness, adhesive force, scratch resistance and aging resistance.
Description
Technical Field
The application relates to the technical field of paint, in particular to varnish with high surface tension and a preparation method thereof.
Background
The varnish is a coating which is composed of resin as a main film forming substance, a solvent, an auxiliary agent, wax emulsion and the like. Since both the coating material and the coating film are transparent, they are also called transparent coating materials. The varnish is coated on the surface of an object, forms a smooth film after drying, shows the original texture of the object surface, and has the characteristics of transparency, glossiness, quick film forming, water resistance and the like. The resin is a film forming substance, the auxiliary agent mainly plays roles of defoaming, leveling and the like, and the wax emulsion can improve the scratch resistance of the varnish.
The existing varnishes are various, and the common varnishes mainly comprise: ester glue varnish, phenol varnish, alkyd varnish, nitro varnish, acrylic varnish, polyester varnish and the like. Since the film-forming substance of varnish is mainly an oily resin and has a poor affinity with aqueous ink, it is necessary to increase the surface tension of the varnish after film formation to promote wetting and adhesion of the ink on the varnish surface when drawing or writing characters on the varnish surface with the ink. The surface tension of the varnish on the market is generally low, the surface tension of most of the varnish is 36-38 dynes, and the surface tension is even lower than 36 dynes, and the ink deinking is easily caused by the low surface tension, so that the application effect of the varnish in products is influenced.
The surface tension of the varnish after film formation is mainly determined by resin and wax emulsion, wherein the glass transition temperature of the resin is high, and the surface tension is reduced by the addition of the wax emulsion. The surface tension of the varnish after film forming can be improved by selecting resin with lower glass transition temperature or reducing the content of wax emulsion, but the temperature resistance and the scratch resistance of the varnish are reduced, and the service life of the varnish is influenced.
Disclosure of Invention
The invention aims to provide a varnish with high surface tension and a preparation method thereof, which are used for solving the problem that the surface tension of the existing varnish is limited.
In a first aspect, the invention provides a high surface tension varnish, which comprises the following components in percentage by mass:
acrylic resin A: 39 to 45 weight percent;
acrylic resin B: 13 wt% -15 wt%;
wax emulsion: 3 wt% -5 wt%;
defoaming agent: 0.1 wt%;
wetting agent: 0.1 wt%;
modifying agent: 0.05 wt% -0.1 wt%;
anhydrous ethanol: 18 to 21 weight percent;
deionized water: 18 to 21 weight percent.
Optionally, the acrylic resin A is acrylic resin with a glass transition temperature of 10-30 ℃; the acrylic resin B is acrylic resin with the glass transition temperature of 80-100 ℃.
Optionally, the modifier is nano alumina or fumed silica.
Optionally, the defoaming agent is one or two of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether.
Optionally, the wetting agent is a polyoxyethylene alkylated ether.
In another aspect, the present invention also provides a method for preparing a varnish with high surface tension, comprising the following steps:
mixing deionized water and absolute ethyl alcohol with the same mass, and dispersing in a dispersion machine to obtain a solution I, wherein the mass fractions of the deionized water and the absolute ethyl alcohol in the varnish are respectively as follows: 18 to 21 weight percent and 18 to 21 weight percent;
adding a defoaming agent, a wetting agent and a modifying agent into the solution I in sequence, and dispersing in a dispersion machine to obtain a solution II, wherein the defoaming agent is one or two of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether, the wetting agent is polyoxyethylene alkylated ether, the modifying agent is alumina or fumed silica, and the mass fractions of the defoaming agent, the wetting agent and the modifying agent in the varnish are respectively: 0.1 w%, 0.1 wt%, 0.05-0.1 wt%;
adding acrylic resin A into the solution II, and dispersing in a dispersion machine to obtain a solution III, wherein the acrylic resin A is acrylic resin with a glass transition temperature of 10-30 ℃, and the mass fraction of the acrylic ester A in the varnish is 39-45 wt%;
adding acrylic resin B and wax emulsion into the solution III, dispersing in a dispersing machine, and filtering to obtain the final varnish, wherein the acrylic resin B is acrylic resin with a glass transition temperature of 80-100 ℃, and the mass fraction of the acrylic resin B in the varnish is 13-15 wt%.
Optionally, in the step of mixing deionized water and absolute ethyl alcohol with the same mass, and dispersing in a dispersion machine to obtain the solution I, the rotating speed of the dispersion machine is 1500rpm, and the dispersion time is 5-8 minutes.
Optionally, in the step of sequentially adding the defoaming agent, the wetting agent and the modifying agent into the solution I and dispersing in a dispersion machine to obtain the solution II, the rotating speed of the dispersion machine is 1400-1600 rpm, and the dispersion time is 28-32 minutes.
Optionally, in the step of adding the acrylic resin A into the solution II and dispersing in a dispersing machine to obtain the solution III, the rotating speed of the dispersing machine is 700-900 rpm, and the dispersing time is 18-22 minutes.
Optionally, in the step of adding the acrylic resin B and the wax emulsion into the solution III, dispersing in a dispersion machine, and filtering to obtain the final varnish, the rotation speed of the dispersion machine is 700-900 rpm, and the dispersion time is 28-32 minutes.
According to the above technical solution, the varnish with high surface tension provided by the present invention comprises: the paint comprises acrylic resin, wax emulsion, a defoaming agent, a wetting agent, a modifier, absolute ethyl alcohol and deionized water, wherein the defoaming agent is one or two of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether, the wetting agent is polyoxyethylene alkylated ether, and the modifier is aluminum oxide or fumed silica. The invention also provides a preparation method of the varnish with high surface tension, which comprises the following steps: mixing and dispersing absolute ethyl alcohol and deionized water to obtain a solution I; sequentially adding a defoaming agent, a wetting agent and a modifying agent into the solution I, and dispersing in a dispersion machine to obtain a solution II; adding acrylic resin A into the solution II, and dispersing in a dispersion machine to obtain a solution III; and adding the acrylic resin B and the wax emulsion into the solution III, dispersing in a dispersing machine, and filtering to obtain the final varnish. According to the invention, nano alumina or fumed silica is added into the acrylic resin varnish as a modifier, the prepared varnish has high surface tension, ink falling is effectively prevented, and the varnish also has good smoothness, adhesive force, scratch resistance and aging resistance.
Drawings
FIG. 1 is a flow chart of a method for preparing a high surface tension varnish according to the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Firstly, the invention provides a varnish with high surface tension, which comprises the following components in percentage by mass:
acrylic resin A: 39 to 45 weight percent;
acrylic resin B: 13 wt% -15 wt%;
wax emulsion: 3 wt% -5 wt%;
defoaming agent: 0.1 wt%;
wetting agent: 0.1 wt%;
modifying agent: 0.05 wt% -0.1 wt%;
anhydrous ethanol: 18 to 21 weight percent;
deionized water: 18 to 21 weight percent.
Wherein the acrylic resin A is acrylic resin with the glass transition temperature of 10-30 ℃; the acrylic resin B is acrylic resin with a glass transition temperature of 80-100 ℃, the type and source of the acrylic resin A and the acrylic resin B are not limited in the invention, and the acrylic resin B can be prepared by using the resins known by the technical personnel in the field, such as: acrylic resin A adopts a Disemann A-1092/A-1093 product, and acrylic resin B adopts a Disemann A-1091 product.
The modifier is alumina or fumed silica, the type and source of which are not limited by the present invention, and products well known to those skilled in the art can be used, for example: the alumina is Degussa alumina C, and the gas phase silica is Degussa OK 607.
The defoaming agent is one or two of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether, the types and sources of the polyoxyethylene polyoxypropylene pentaerythritol ether, the polyoxyethylene polyoxypropylene amine ether, the polyoxypropylene glycerol ether and the polyoxypropylene polyoxyethylene glycerol ether are not limited, products well known to those skilled in the art can be adopted, and for example, products of Dow 902W can be adopted.
The wetting agent is a polyoxyethylene alkylated ether, the invention is not limited to the kind and source of the polyoxyethylene alkylated ether, and products well known to those skilled in the art can be used, for example: a digao WET250 brand product may be used.
The present invention is not particularly limited in the kind and source of the wax emulsion, and products well known to those skilled in the art may be used, for example: a product of the mark "ruosheng 842N" may be used.
In addition, the invention also provides a preparation method of the varnish with high surface tension, and please refer to fig. 1, which is a flow chart of the preparation method.
Step S1: mixing deionized water and absolute ethyl alcohol with the same mass, and dispersing in a dispersion machine to obtain a solution I, wherein the mass fractions of the deionized water and the absolute ethyl alcohol in the varnish are respectively as follows: 18 to 21 weight percent and 18 to 21 weight percent.
Step S2: adding a defoaming agent, a wetting agent and a modifying agent into the solution I in sequence, and dispersing in a dispersion machine to obtain a solution II, wherein the defoaming agent is one or two of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether, the wetting agent is polyoxyethylene alkylated ether, the modifying agent is alumina or fumed silica, and the mass fractions of the defoaming agent, the wetting agent and the modifying agent in the varnish are respectively: 0.1 w%, 0.1 wt%, 0.05-0.1 wt%.
Step S3: adding acrylic resin A into the solution II, and dispersing in a dispersion machine to obtain a solution III, wherein the acrylic resin A is acrylic resin with a glass transition temperature of 10-30 ℃, and the mass fraction of the acrylic ester A in the varnish is 39-45 wt%.
Step S4: adding acrylic resin B and wax emulsion into the solution III, dispersing in a dispersing machine, and filtering to obtain the final varnish, wherein the acrylic resin B is acrylic resin with a glass transition temperature of 80-100 ℃, the mass fraction of the acrylic resin B in the varnish is 13-15 wt%, and the mass fraction of the wax emulsion in the varnish is 3-5 wt%.
The acrylic resin A is acrylic resin with the glass transition temperature of 10-30 ℃; the acrylic resin B is acrylic resin with a glass transition temperature of 80-100 ℃, the type and source of the acrylic resin A and the acrylic resin B are not limited in the invention, and the acrylic resin B can be prepared by using the resins known by the technical personnel in the field, such as: acrylic resin A adopts a Disemann A-1092/A-1093 product, and acrylic resin B adopts a Disemann A-1091 product.
The modifier is alumina or fumed silica, the type and source of which are not limited by the present invention, and products well known to those skilled in the art can be used, for example: the alumina is Degussa alumina C, and the gas phase silica is Degussa OK 607.
The defoaming agent is one or two of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether, the types and sources of the polyoxyethylene polyoxypropylene pentaerythritol ether, the polyoxyethylene polyoxypropylene amine ether, the polyoxypropylene glycerol ether and the polyoxypropylene polyoxyethylene glycerol ether are not limited, products well known to those skilled in the art can be adopted, and for example, products of Dow 902W can be adopted.
The wetting agent is a polyoxyethylene alkylated ether, the invention is not limited to the kind and source of the polyoxyethylene alkylated ether, and products well known to those skilled in the art can be used, for example: a digao WET250 brand product may be used.
The present invention is not particularly limited in the kind and source of the wax emulsion, and products well known to those skilled in the art may be used, for example: a product of the mark "ruosheng 842N" may be used.
According to the present invention, in step S1, the rotation speed of the dispersion machine is 1500rpm, and the dispersion time is 5 to 8 minutes. According to the invention, in step S2, the rotation speed of the dispersion machine is 1400-1600 rpm, and the dispersion time is 28-32 minutes. According to the invention, in step S3, the rotation speed of the dispersion machine is 700-900 rpm, and the dispersion time is 18-22 minutes. According to the invention, in step S4, the rotation speed of the dispersion machine is 700-900 rpm, and the dispersion time is 28-32 minutes.
The invention has no special limit to the brand and specification of the dispersion machine, and the dispersion machine capable of realizing the process can be adopted.
For the sake of clarity, the following examples are given in detail.
Example 1:
deionized water accounting for 18 wt% of the total mass fraction of the varnish and absolute ethyl alcohol accounting for 18 wt% of the total mass fraction of the varnish (the mass fractions of the components are percentages of the total mass of the varnish and are not described again) are mixed and dispersed for 5 minutes at a rotating speed of 1500rpm in a dispersion machine to obtain a solution I.
And sequentially adding 0.1 wt% of defoaming agent, 0.1 wt% of wetting agent and 0.05 wt% of modifying agent into the solution I, and dispersing for 28 minutes in a dispersion machine at the rotating speed of 1400rpm to obtain a solution II, wherein the defoaming agent is a Digao 902W brand product, the wetting agent is a Digao WET250 brand product, and the modifying agent is Degussa alumina C.
And adding 45 wt% of acrylic resin A into the solution II, and dispersing for 18 minutes in a dispersion machine at the rotating speed of 700rpm to obtain a solution III, wherein the acrylic resin A is a Tesmann A-1092 brand product.
And adding 15 wt% of acrylic resin B and 3.75 wt% of wax emulsion into the solution III in sequence, dispersing for 28 minutes in a dispersion machine at 700rpm, and filtering to obtain the final varnish, wherein the acrylic resin B is a Boettsmann A-1091 brand product, and the wax emulsion is a Unikeal 842N brand product.
Example 2:
deionized water accounting for 22 wt% of the total mass fraction of the varnish and absolute ethyl alcohol accounting for 22 wt% of the total mass fraction of the varnish (the mass fractions of the components are percentages of the total mass of the varnish and are not described again) are mixed and dispersed in a dispersion machine at a rotating speed of 1500rpm for 8 minutes to obtain a solution I.
And sequentially adding 0.1 wt% of defoaming agent, 0.1 wt% of wetting agent and 0.1 wt% of modifying agent into the solution I, and dispersing for 32 minutes in a dispersion machine at the rotating speed of 1600rpm to obtain a solution II, wherein the defoaming agent is a Digao 902W brand product, the wetting agent is a Digao WET250 brand product, and the modifying agent is Degussa alumina C.
And adding 39 wt% of acrylic resin A into the solution II, and dispersing for 22 minutes in a dispersion machine at the rotating speed of 900rpm to obtain a solution III, wherein the acrylic resin A is a Tesmann A-1092 brand product.
And (3) adding 13 wt% of acrylic resin B and 3.7 wt% of wax emulsion into the solution III in sequence, dispersing for 32 minutes in a dispersion machine at 900rpm, and filtering to obtain the final varnish, wherein the acrylic resin B is a Boettsmann A-1091 brand product, and the wax emulsion is a Unikeal 842N brand product.
Example 3:
deionized water accounting for 20 wt% of the total mass fraction of the varnish and absolute ethyl alcohol accounting for 20 wt% of the total mass fraction of the varnish (the mass fractions of the components are percentages of the total mass of the varnish and are not described again) are mixed and dispersed for 5 minutes at a rotating speed of 1500rpm in a dispersion machine, so as to obtain a solution I.
And sequentially adding 0.1 wt% of defoaming agent, 0.1 wt% of wetting agent and 0.05 wt% of modifying agent into the solution I, and dispersing for 30 minutes in a dispersion machine at the rotating speed of 1500rpm to obtain a solution II, wherein the defoaming agent is a Digao 902W brand product, the wetting agent is a Digao WET250 brand product, and the modifying agent is Degussa alumina C.
And adding 42 wt% of acrylic resin A into the solution II, and dispersing for 20 minutes in a dispersion machine at the rotating speed of 800rpm to obtain a solution III, wherein the acrylic resin A is a Tesmann A-1092 brand product.
And (3) sequentially adding 14 wt% of acrylic resin B and 3.75 wt% of wax emulsion into the solution III, dispersing for 30 minutes in a dispersion machine at 800rpm, and filtering to obtain the final varnish, wherein the acrylic resin B is a Boettsmann A-1091 brand product, and the wax emulsion is a Unikeal 842N brand product.
Example 4:
deionized water accounting for 18 wt% of the total mass fraction of the varnish and absolute ethyl alcohol accounting for 18 wt% of the total mass fraction of the varnish (the mass fractions of the components are percentages of the total mass of the varnish and are not described again) are mixed and dispersed for 5 minutes at a rotating speed of 1500rpm in a dispersion machine to obtain a solution I.
And sequentially adding 0.1 wt% of defoaming agent, 0.1 wt% of wetting agent and 0.1 wt% of modifying agent into the solution I, and dispersing for 28 minutes in a dispersion machine at the rotating speed of 1400rpm to obtain a solution II, wherein the defoaming agent is a Digao 902W brand product, the wetting agent is a Digao WET250 brand product, and the modifying agent is Degussa alumina C.
Adding 42 wt% of acrylic resin A into the solution II, and dispersing for 18 minutes in a dispersion machine at the rotating speed of 700rpm to obtain a solution III, wherein the acrylic resin A is a Tesmann A-1093 brand product.
And (3) adding 14 wt% of acrylic resin B and 3.7 wt% of wax emulsion into the solution III in sequence, dispersing for 28 minutes in a dispersion machine at 700rpm, and filtering to obtain the final varnish, wherein the acrylic resin B is a Boss Tesmann A-1091 brand product, and the wax emulsion is a Unikeal 842N brand product.
Example 5:
deionized water accounting for 22 wt% of the total mass fraction of the varnish and absolute ethyl alcohol accounting for 22 wt% of the total mass fraction of the varnish (the mass fractions of the components are percentages of the total mass of the varnish and are not described again) are mixed and dispersed in a dispersion machine at a rotating speed of 1500rpm for 8 minutes to obtain a solution I.
And sequentially adding 0.1 wt% of defoaming agent, 0.1 wt% of wetting agent and 0.05 wt% of modifying agent into the solution I, and dispersing for 32 minutes in a dispersion machine at the rotating speed of 1600rpm to obtain a solution II, wherein the defoaming agent is a Digao 902W brand product, the wetting agent is a Digao WET250 brand product, and the modifying agent is Degussa alumina C.
And adding 39 wt% of acrylic resin A into the solution II, and dispersing for 22 minutes in a dispersion machine at the rotating speed of 900rpm to obtain a solution III, wherein the acrylic resin A is a Tesmann A-1093 brand product.
And (3) sequentially adding 13 wt% of acrylic resin B and 3.75 wt% of wax emulsion into the solution III, dispersing for 32 minutes in a dispersion machine at 900rpm, and filtering to obtain the final varnish, wherein the acrylic resin B is a Boettsmann A-1091 brand product, and the wax emulsion is a Unikeal 842N brand product.
Example 6:
deionized water accounting for 20 wt% of the total mass fraction of the varnish and absolute ethyl alcohol accounting for 20 wt% of the total mass fraction of the varnish (the mass fractions of the components are percentages of the total mass of the varnish and are not described again) are mixed and dispersed for 5 minutes at a rotating speed of 1500rpm in a dispersion machine, so as to obtain a solution I.
And sequentially adding 0.1 wt% of defoaming agent, 0.1 wt% of wetting agent and 0.1 wt% of modifying agent into the solution I, and dispersing for 30 minutes in a dispersion machine at the rotating speed of 1500rpm to obtain a solution II, wherein the defoaming agent is a Digao 902W brand product, the wetting agent is a Digao WET250 brand product, and the modifying agent is Degussa alumina C.
And adding 42 wt% of acrylic resin A into the solution II, and dispersing for 20 minutes in a dispersion machine at the rotating speed of 800rpm to obtain a solution III, wherein the acrylic resin A is a Tesmann A-1093 brand product.
And (3) sequentially adding 14 wt% of acrylic resin B and 3.7 wt% of wax emulsion into the solution III, dispersing for 30 minutes in a dispersion machine at 800rpm, and filtering to obtain the final varnish, wherein the acrylic resin B is a Boettsmann A-1091 brand product, and the wax emulsion is a Unikeal 842N brand product.
The varnishes having high surface tensions obtained in examples 1 to 6 were subjected to various index tests, and the results are shown in Table 1.
Table 1 shows the performance indexes of the varnish with high surface tension prepared in example 1.
TABLE 1
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A varnish with high surface tension is characterized by comprising the following components in percentage by mass:
acrylic resin A: 39 to 45 weight percent;
acrylic resin B: 13 wt% -15 wt%;
wax emulsion: 3 wt% -5 wt%;
defoaming agent: 0.1 wt%;
wetting agent: 0.1 wt%;
modifying agent: 0.05 wt% -0.1 wt%;
anhydrous ethanol: 18 to 21 weight percent;
deionized water: 18 to 21 weight percent;
the modifier is nano-alumina.
2. The high surface tension varnish according to claim 1, wherein the acrylic resin a is an acrylic resin having a glass transition temperature of 10 to 30 ℃; the acrylic resin B is acrylic resin with the glass transition temperature of 80-100 ℃.
3. The high surface tension varnish according to claim 1, wherein the defoaming agent is one or two of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether.
4. The high surface tension varnish of claim 1, wherein the wetting agent is a polyoxyethylene alkylated ether.
5. A preparation method of varnish with high surface tension is characterized by comprising the following steps:
mixing deionized water and absolute ethyl alcohol with the same mass, and dispersing in a dispersion machine to obtain a solution I, wherein the mass fractions of the deionized water and the absolute ethyl alcohol in the varnish are respectively as follows: 18 to 21 weight percent and 18 to 21 weight percent;
adding a defoaming agent, a wetting agent and a modifying agent into the solution I in sequence, and dispersing in a dispersion machine to obtain a solution II, wherein the defoaming agent is one or two of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether, the wetting agent is polyoxyethylene alkylated ether, the modifying agent is nano aluminum oxide, and the mass fractions of the defoaming agent, the wetting agent and the modifying agent in the varnish are respectively as follows: 0.1 w%, 0.1 wt%, 0.05-0.1 wt%;
adding acrylic resin A into the solution II, and dispersing in a dispersion machine to obtain a solution III, wherein the acrylic resin A is acrylic resin with a glass transition temperature of 10-30 ℃, and the mass fraction of the acrylic resin A in the varnish is 39-45 wt%;
adding acrylic resin B and wax emulsion into the solution III, dispersing in a dispersing machine, and filtering to obtain the final varnish, wherein the acrylic resin B is acrylic resin with a glass transition temperature of 80-100 ℃, and the mass fraction of the acrylic resin B in the varnish is 13-15 wt%.
6. The method for preparing a varnish with high surface tension according to claim 5, wherein in the step of mixing deionized water and absolute ethyl alcohol with the same mass, and dispersing in a dispersing machine to obtain the solution I, the rotating speed of the dispersing machine is 1500rpm, and the dispersing time is 5 to 8 minutes.
7. The method for preparing the varnish with high surface tension as claimed in claim 5, wherein in the step of adding the defoaming agent, the wetting agent and the modifying agent into the solution I in sequence and dispersing in a dispersing machine to obtain the solution II, the rotating speed of the dispersing machine is 1400-1600 rpm, and the dispersing time is 28-32 minutes.
8. The method for preparing the varnish with high surface tension according to claim 5, wherein in the step of adding the acrylic resin A into the solution II and dispersing in a dispersing machine to obtain the solution III, the rotating speed of the dispersing machine is 700 to 900rpm, and the dispersing time is 18 to 22 minutes.
9. The method for preparing the varnish with high surface tension according to claim 5, wherein in the step of adding the acrylic resin B and the wax emulsion into the solution III, dispersing in a dispersing machine, and filtering to obtain the final varnish, the rotating speed of the dispersing machine is 700-900 rpm, and the dispersing time is 28-32 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711274457.1A CN107903739B (en) | 2017-12-06 | 2017-12-06 | Varnish with high surface tension and preparation method thereof |
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