CN111286242A - High-solid-content transparent paint and preparation method thereof - Google Patents
High-solid-content transparent paint and preparation method thereof Download PDFInfo
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- CN111286242A CN111286242A CN202010212842.9A CN202010212842A CN111286242A CN 111286242 A CN111286242 A CN 111286242A CN 202010212842 A CN202010212842 A CN 202010212842A CN 111286242 A CN111286242 A CN 111286242A
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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
- C09D133/04—Homopolymers or copolymers of esters
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
-
- C—CHEMISTRY; METALLURGY
- 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
- C08L2205/03—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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a high-solid-content transparent paint which comprises the following raw materials in percentage by weight: 50-60% of acrylic resin, 20-25% of amino resin, 3-5% of epoxy resin, 4-10% of pigment, 1-4% of adhesion agent, 1-4% of leveling agent and the balance of viscosity regulating diluent. Also discloses a preparation method of the high-solid-content clear paint, which comprises the following steps: (1) grinding and mixing the pigment; (2) adding acrylic resin, amino resin, epoxy resin, an adhesive, a flatting agent, a diluent for adjusting viscosity and pigment into a high-shear disperser in sequence, and stirring at high speed and low speed to prepare a high-solid-content clear paint crude product; (3) and filtering and subpackaging the high-solid clear paint crude product to obtain the high-solid clear paint. The high-solid-content clear paint disclosed by the invention adopts an oily acrylic acid quick-drying system, has good resin toughness, good adhesion to a stainless steel substrate under the condition of thin coating or low temperature, is not easy to generate flowers and color, saves the paint and can reduce the cost.
Description
Technical Field
The invention relates to the field of coatings, and particularly relates to a high-solid-content transparent paint and a preparation method thereof.
Background
With further enhancement of environmental protection laws and improvement of coating manufacturing technologies, High Solids Coatings (HSC) have come into existence. The application range of the high-solid paint and the main variety of the high-solid paint are mainly applied to the automobile industry, and particularly the high-solid paint is used as a finish paint and a middle coating of a car in a larger proportion.
The core problem of HSC is trying to reduce the relative molecular mass of traditional film forming materials, reduce viscosity, improve solubility, rely on efficient crosslinking reactions during film formation, and ensure perfect coating quality to the level of thermosetting solvent-based coatings or higher. The technological process of synthesizing high solid paint is mainly to synthesize oligomer or oligomer to reduce the molecular weight of the film forming matter and the viscosity of the resin greatly, and each low molecular has homogeneous functional group to form excellent paint film and to reach the performance of traditional paint film. In addition, a solvent with strong dissolving power is required to be selected, so that the viscosity is reduced more effectively.
Polyurea elastomer coatings are representative of such coatings. Chinese patent CN105038546B discloses a spray polyurea elastomer and a preparation method thereof, which comprises the following components: amine-terminated polyether, chain extender, fumed silica, dispersant, defoaming agent and color paste. The technique has the following defects: the coating has poor adhesive force, is easy to generate flowers and is difficult to color when being thinly coated or at a lower temperature.
Disclosure of Invention
One of the technical problems to be solved by the invention is to provide a high-solid clear paint which has good spraying performance, good adhesion force under the condition of thin coating or low temperature, difficult flowering and easy coloring.
The invention solves the technical problems through the following technical scheme:
a high-solid-content transparent paint comprises the following raw materials in percentage by weight: 50-60% of acrylic resin, 20-25% of amino resin, 3-5% of epoxy resin, 1-4% of pigment, 1-4% of adhesion agent, 1-4% of flatting agent and the balance of diluent.
The high-solid-content clear paint disclosed by the invention adopts an oily acrylic acid quick-drying system, has good resin toughness, good adhesion to a stainless steel substrate under the condition of thin coating or low temperature, is not easy to generate flowers and color, saves the paint and can reduce the cost.
Preferably, the adhesion agent is a polymeric phosphate.
Preferably, the diluent comprises xylene, ethylene glycol butyl ether, n-butanol, propylene glycol methyl ether acetate or methyl ethyl butyl ketone; the diluent of the present invention is useful for viscosity control.
The acrylic resin provided by Taiwan university chemical industry is thermosetting acrylic resin with the model number of H171, and has good light and color retention, water resistance and chemical resistance and quick drying due to the relatively large molecular weight of the thermosetting acrylic resin.
The amino resin is butylated melamine urea formaldehyde resin provided by Taiwan Changchun chemical industry Co., Ltd under model number MO 12.
The epoxy resin is preferably epoxy resin E10 supplied by Taiwan Changchun chemical Co., Ltd.
The pigment is preferably pigment red 3BL of Yana pigment chemical Co., Ltd, of Nantong.
The leveling agent is preferably leveling agent B67-1 supplied by conventional intercoat trade company, Inc.
The second technical problem to be solved by the invention is to provide a preparation method of high-solid clear paint, which comprises the following steps:
(1) uniformly mixing the pigments, then placing the mixture in a horizontal grinder, grinding for 5-31h every 500Kg, and simultaneously cooling the cavity sleeve of the grinder by using circulating water;
(2) sequentially adding acrylic resin, amino resin, epoxy resin, an adhesive, a flatting agent, a diluent for viscosity adjustment and the ground pigment in the step (1) into a high-shear disperser, stirring and mixing at room temperature, firstly stirring at a high speed for 10-20min, and then stirring at a low speed for 10-20min to prepare a high-solid-content clear paint crude product;
(3) and (3) filtering the high-solid-content clear paint crude product prepared in the step (2) to obtain the high-solid-content clear paint crude product.
Further, the grinding pressure in the step (3) is 0.05-0.12MPa, and the grinding temperature is 30-45 ℃.
Further, the high-speed stirring speed in the step (2) is 1200-1500 r/min.
Further, the low-speed stirring speed in the step (2) is 800-.
Further, the method also comprises the following detection steps: taking 30-50g of sample, selecting a diluent for paint mixing for 12-16s, wherein the addition amount of the diluent is 1:0.4-0.7g, carrying out spraying operation, baking the sprayed plate at the temperature of 170 ℃ for 15-30min, and carrying out physical property inspection and judgment on the high-solid transparent paint on the color plate after baking.
Compared with the prior art, the invention has the following advantages:
(1) the high-solid-content clear paint disclosed by the invention adopts an oily acrylic acid quick-drying system, has good resin toughness, good adhesion to a stainless steel substrate under the condition of thin coating or low temperature, is not easy to generate flowers and color, saves the paint and can reduce the cost.
(2) The high-solid-content transparent paint disclosed by the invention meets the management requirements of various food-grade harmful substances in European Union, meets BPA, SCCP, MBT and FDA, meets the requirements of alcohol wiping resistance, can reach 5 cycles in 132min cycle of a dishwasher, and does not generate bubbles after being boiled in water at 80 ℃ for 30 min.
(3) In the preparation process, the raw materials can be more fully dispersed in the medium by firstly stirring at a high speed and then stirring at a low speed.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
A high-solid-content transparent paint comprises the following raw materials in percentage by weight: 50-60% of acrylic resin, 20-25% of amino resin, 3-5% of epoxy resin, 1-4% of pigment, 1-4% of adhesion agent, 1-4% of flatting agent and the balance of diluent.
The adhesion agent is a polymeric phosphate.
The diluent comprises xylene, ethylene glycol butyl ether, n-butanol, propylene glycol methyl ether acetate or methyl ethyl butyl ketone; the diluent of the present invention is useful for viscosity control.
The acrylic resin provided by Taiwan university chemical industry is thermosetting acrylic resin with the model number of H171, and has good light and color retention, water resistance and chemical resistance and quick drying due to the relatively large molecular weight of the thermosetting acrylic resin.
The amino resin is butylated melamine urea formaldehyde resin provided by Taiwan Changchun chemical industry Co., Ltd under model number MO 12.
The epoxy resin is preferably epoxy resin E10 supplied by Taiwan Changchun chemical Co., Ltd.
The pigment is preferably pigment red 3BL of Yana pigment chemical Co., Ltd, of Nantong.
The leveling agent is preferably leveling agent B67-1 supplied by conventional intercoat trade company, Inc.
Example 1
The high-solid-content transparent paint comprises the following raw materials in percentage by weight: 50% of acrylic resin, 25% of amino resin, 5% of epoxy resin, 1% of pigment, 2% of polymerized phosphate, 1% of leveling agent and 16% of n-butyl alcohol.
The preparation method of the high-solid-content clear paint comprises the following steps:
(1) uniformly mixing the pigments, and then grinding the pigments in a horizontal grinder, wherein the grinding pressure is 0.05MPa, the grinding temperature is 30 ℃, the grinding time is 10 hours per 500Kg, and meanwhile, the cavity sleeve of the grinder is cooled by using circulating water;
(2) sequentially adding acrylic resin, amino resin, epoxy resin, polymeric phosphate, a flatting agent, a viscosity adjusting diluent and the ground pigment in the step (1) into a high-shear dispersing machine, firstly adjusting the rotating speed of the high-shear dispersing machine to 1200r/min, stirring at room temperature for 20min, then adjusting the rotating speed of the high-shear dispersing machine to 800r/min, and stirring at room temperature for 20min to obtain a high-solid-content clear paint crude product;
(3) and (3) filtering the high-solid-content clear paint crude product prepared in the step (2) to obtain the high-solid-content clear paint crude product.
Example 2
The high-solid-content transparent paint comprises the following raw materials in percentage by weight: 55% of acrylic resin, 25% of amino resin, 5% of epoxy resin, 1% of pigment, 2% of polymerized phosphate, 1% of leveling agent and 11% of xylene.
The preparation method of the high-solid-content clear paint comprises the following steps:
(1) uniformly mixing the pigments, and then grinding the pigments in a horizontal grinder, wherein the grinding pressure is 0.08MPa, the grinding temperature is 35 ℃, the grinding time is 20 hours per 500Kg, and meanwhile, the cavity sleeve of the grinder is cooled by using circulating water;
(2) sequentially adding acrylic resin, amino resin, epoxy resin, polymeric phosphate, a flatting agent, a viscosity adjusting diluent and the ground pigment in the step (1) into a high-shear dispersing machine, firstly adjusting the rotating speed of the high-shear dispersing machine to 1300r/min, stirring for 15min at room temperature, then adjusting the rotating speed of the high-shear dispersing machine to 900r/min, and stirring for 10min at room temperature to obtain a high-solid-content clear paint crude product;
(3) and (3) filtering the high-solid-content clear paint crude product prepared in the step (2) to obtain the high-solid-content clear paint crude product.
Example 3
The high-solid-content transparent paint comprises the following raw materials in percentage by weight: 56% of acrylic resin, 22% of amino resin, 4% of epoxy resin, 2% of pigment, 1% of polymeric phosphate, 3% of leveling agent and 12% of butyl cellosolve.
The preparation method of the high-solid-content clear paint comprises the following steps:
(1) uniformly mixing the pigments, and then grinding the pigments in a horizontal grinder, wherein the grinding pressure is 0.10MPa, the grinding temperature is 40 ℃, the grinding time is 25 hours per 500Kg, and meanwhile, the cavity sleeve of the grinder is cooled by using circulating water;
(2) sequentially adding acrylic resin, amino resin, epoxy resin, polymeric phosphate, a flatting agent, a viscosity adjusting diluent and the ground pigment in the step (1) into a high-shear dispersing machine, firstly adjusting the rotating speed of the high-shear dispersing machine to 1400r/min, stirring for 10min at room temperature, then adjusting the rotating speed of the high-shear dispersing machine to 1000r/min, and stirring for 15min at room temperature to obtain a high-solid-content clear paint crude product;
(3) and (3) filtering the high-solid-content clear paint crude product prepared in the step (2) to obtain the high-solid-content clear paint crude product.
Example 4
The high-solid-content transparent paint comprises the following raw materials in percentage by weight: 60% of acrylic resin, 20% of amino resin, 3% of epoxy resin, 4% of pigment, 1% of polymeric phosphate, 2% of leveling agent and 10% of propylene glycol methyl ether acetate.
The preparation method of the high-solid-content clear paint comprises the following steps:
(1) uniformly mixing the pigments, and then grinding the pigments in a horizontal grinder, wherein the grinding pressure is 0.12MPa, the grinding temperature is 45 ℃, the grinding time is 30 hours per 500Kg, and meanwhile, the cavity sleeve of the grinder is cooled by using circulating water;
(2) sequentially adding acrylic resin, amino resin, epoxy resin, polymeric phosphate, a flatting agent, a diluent and the ground pigment in the step (1) into a high-shear dispersing machine, firstly adjusting the rotating speed of the high-shear dispersing machine to 1500r/min, stirring at room temperature for 20min, then adjusting the rotating speed of the high-shear dispersing machine to 800r/min, and stirring at room temperature for 10min to obtain a high-solid clear paint crude product;
(3) and (3) filtering the high-solid-content clear paint crude product prepared in the step (2) to obtain the high-solid-content clear paint crude product.
Example 5
This example performed performance testing on the high solids clearcoats prepared in examples 1-4, including the following testing steps: taking 40g of sample, selecting a diluent for mixing paint for 15s, wherein the addition amount of the diluent is 1:0.5g, carrying out spraying operation and thin coating test, baking the sprayed plate at 150 ℃ for 20min, and carrying out physical property inspection and judgment on the high-solid clear paint on the color plate after baking, wherein the results are shown in Table 1.
The coating hardness is detected according to the method of the national standard GB/T6739-2006.
The coating adhesion was tested according to the method of the national standard GB/T9286-1998.
The solid content is detected according to the method of the national standard GB/T1725-1979.
The water resistance is detected according to the method of the national standard GB/T1733-1993.
Migration test of heat shrink film print: the paste heat-shrinkable film is coated on the cup body and baked, and the thermoplastic film print can not be printed on the surface of the paint-spraying cup body. The baking time is 2min at 130 ℃ in winter and 120 ℃ in summer.
Testing paint sunscreen cream: baking in an oven at 38 deg.C for 2 hr to determine if the nail is exposed.
Dishwasher test: 15g of Cascade brand laundry powder, tested for 5 cycles, each for about 132 min. Table 1 shows the results of measuring the physical properties of the aqueous metallic paints prepared in examples 1 to 4.
As can be seen from Table 1, the high-solid clear paint of the invention adopts an oily acrylic acid quick-drying system, has good resin toughness, good adhesion to a stainless steel substrate under the condition of thin coating or low temperature, is not easy to generate patterns and easy to color, saves coating and can reduce cost; the product meets the requirements of various food-grade harmful substances in European Union, BPA, SCCP, MBT and FDA, the alcohol wiping resistance is met, the dishwasher can reach 5 cycles in 132min one cycle, and no bubbles are generated when the dishwasher is boiled in water at 80 ℃ for 30 min.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The high-solid-content transparent paint is characterized by comprising the following raw materials in percentage by weight: 50-60% of acrylic resin, 20-25% of amino resin, 3-5% of epoxy resin, 1-4% of pigment, 1-4% of adhesion agent, 1-4% of flatting agent and the balance of diluent.
2. The method for preparing a high-solid clear paint according to claim 1, wherein: the adhesion agent is a polymeric phosphate.
3. The method for preparing a high-solid clear paint according to claim 1, wherein: the diluent comprises xylene, ethylene glycol butyl ether, n-butanol, propylene glycol methyl ether acetate or methyl ethyl butyl ketone.
4. A method of preparing a high-solids clear paint according to any of claims 1 to 3, comprising the steps of:
(1) placing the pigment in a horizontal grinder, grinding for 5-31h every 500Kg, and cooling the cavity sleeve of the grinder by using circulating water;
(2) sequentially adding acrylic resin, amino resin, epoxy resin, an adhesive, a flatting agent, a diluent and the ground pigment in the step (1) into a high-shear disperser, stirring and mixing at room temperature, firstly stirring at a high speed for 10-20min, and then stirring at a low speed for 10-20min to prepare a high-solid-content clear paint crude product;
(3) and (3) filtering the crude high-solid-content clear paint prepared in the step (2) to obtain the high-solid-content clear paint.
5. The method for preparing a high-solid clear paint according to claim 4, wherein: the grinding pressure in the step (3) is 0.05-0.12MPa, and the grinding temperature is 30-45 ℃.
6. The method for preparing a high-solid clear paint according to claim 4, wherein: the high-speed stirring speed in the step (2) is 1200-1500 r/min.
7. The method for preparing a high-solid clear paint according to claim 4, wherein: the low-speed stirring speed in the step (2) is 800-1000 r/min.
8. The method for preparing a high-solid clear paint according to claim 4, wherein: the method also comprises the following detection steps: taking 30-50g of sample, selecting a diluent for paint mixing for 12-16s, wherein the addition amount of the diluent is 1:0.4-0.7g, carrying out spraying operation, baking the sprayed plate at the temperature of 170 ℃ for 15-30min, and carrying out physical property inspection and judgment on the high-solid transparent paint on the color plate after baking.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010212842.9A CN111286242A (en) | 2020-03-24 | 2020-03-24 | High-solid-content transparent paint and preparation method thereof |
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| CN202010212842.9A CN111286242A (en) | 2020-03-24 | 2020-03-24 | High-solid-content transparent paint and preparation method thereof |
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| CN111286242A true CN111286242A (en) | 2020-06-16 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436124A (en) * | 2013-08-28 | 2013-12-11 | 广西梧州龙鱼漆业有限公司 | Special stoving varnish for oil drum and preparation method of special stoving varnish |
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- 2020-03-24 CN CN202010212842.9A patent/CN111286242A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103436124A (en) * | 2013-08-28 | 2013-12-11 | 广西梧州龙鱼漆业有限公司 | Special stoving varnish for oil drum and preparation method of special stoving varnish |
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Application publication date: 20200616 |