CN114958157A - Acrylic resin paint, composite paint structure and preparation method thereof - Google Patents
Acrylic resin paint, composite paint structure and preparation method thereof Download PDFInfo
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- CN114958157A CN114958157A CN202210751002.9A CN202210751002A CN114958157A CN 114958157 A CN114958157 A CN 114958157A CN 202210751002 A CN202210751002 A CN 202210751002A CN 114958157 A CN114958157 A CN 114958157A
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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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- 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
- C09D7/20—Diluents or solvents
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- 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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- 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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- 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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- 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
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- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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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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Abstract
The invention relates to an acrylic resin paint, a composite paint structure and a preparation method thereof, wherein the acrylic resin paint comprises the following components in parts by weight: 15-30 parts of acrylic resin A, 15-20 parts of acrylic resin B, 5-15 parts of anti-sagging resin, 20-30 parts of polyester resin, 5-15 parts of amino resin A, 5-15 parts of amino resin B, 1-3 parts of a dispersant, 0.5-4 parts of an anti-settling agent, 5-10 parts of a filler and 22-40 parts of a solvent; the molecular weight of the acrylic resin A is 50000-80000, the molecular weight of the acrylic resin B is 1000-20000, the molecular weight of the amino resin A is 3000-4000, the molecular weight of the amino resin B is 1000-2000, and the solvent comprises diethylene glycol monobutyl ether. After the acrylic resin paint is sprayed, independent baking is not needed, and baking is carried out after finishing paint is continuously sprayed, so that the basic performance of the acrylic resin paint meets the requirement.
Description
Technical Field
The invention relates to the field of coatings, and particularly relates to an acrylic resin paint, a composite paint structure and a preparation method thereof.
Background
With the development of social economy, automobiles increasingly become indispensable vehicles for life, and the coating process of automobile bodies is more vigorous along with personalized requirements. The traditional coating color process comprises the following steps: (1) baking after electrophoresis to obtain primer; (2) spraying the middle coating, and baking; (3) spraying color register finish paint and drying; (4) shielding a chromatography area, spraying basic finish paint, and carrying out flash drying treatment; (5) removing the shielding, spraying varnish and baking. That is, most of the steps in the above-described conventional paint process involve a baking process, and each baking process requires energy consumption, and at the same time, results in a reduction in production efficiency, thereby increasing production costs.
Therefore, it is of great significance to provide an intermediate coating which can be used in a coating color register process, does not need to be baked separately, and can meet the basic performance.
Disclosure of Invention
Based on the above, the invention provides the acrylic resin paint, the composite paint structure and the preparation method thereof, which can meet the basic performance without independently carrying out baking treatment.
The technical scheme of the invention for solving the technical problems is as follows.
The acrylic resin paint comprises the following components in parts by weight:
15-30 parts of acrylic resin A, 15-20 parts of acrylic resin B, 5-15 parts of anti-sagging resin, 20-30 parts of polyester resin, 5-15 parts of amino resin A, 5-15 parts of amino resin B, 1-3 parts of a dispersant, 0.5-4 parts of an anti-settling agent, 5-10 parts of a filler and 22-40 parts of a solvent; the molecular weight of the acrylic resin A is 50000-80000, the molecular weight of the acrylic resin B is 1000-20000, the molecular weight of the amino resin A is 3000-4000, the molecular weight of the amino resin B is 1000-2000, and the solvent comprises diethylene glycol monobutyl ether.
In some embodiments, the acrylic resin paint comprises the following components in parts by weight:
15-25 parts of acrylic resin A, 15-20 parts of acrylic resin B, 5-9 parts of anti-sagging resin, 25-29 parts of polyester resin, 8 parts of amino resin A, 11-16 parts of amino resin B, 1-3 parts of dispersing agent, 8-10 parts of filler and 25-35 parts of solvent.
In some embodiments, the mass ratio of the polyester resin to the acrylic resin A in the acrylic resin paint is (1-2): 1.
In some of these embodiments, the dispersant is selected from at least one of an organobentonite and a polycarboxylate in the acrylic paint.
In some of the embodiments, in the acrylic lacquer, the anti-settling agent is selected from at least one of a polyamide wax, an oxidized polyethylene wax, and fumed silica.
In some of these embodiments, the filler is nano barium sulfate in the acrylic lacquer.
In some of these embodiments, the solvent further comprises at least one of isobutanol, butyl acetate, and ethylene glycol butyl ether in the acrylic lacquer.
In some embodiments, the acrylic resin paint further comprises 0.5-2 parts by weight of a cosolvent, 0.1-0.5 part by weight of a defoaming agent and 0.001-0.005 part by weight of an ultraviolet absorber.
The invention also provides a composite paint structure which comprises the primer layer, the intermediate paint layer, the finish paint layer and the clear paint layer which are sequentially arranged, wherein the raw material of the intermediate paint layer is the acrylic resin paint.
In some embodiments, the composite paint structure has a color register region and a non-color register region on the middle paint layer, the top paint layer includes a color register top paint layer and a basic top paint layer, the color register top paint layer is disposed on the color register region, and the basic top paint layer is disposed on the non-color register region.
The invention also provides a preparation method of the composite paint structure, which comprises the following steps:
(1) spraying the acrylic resin paint on the primer layer, and leveling to obtain a wet acrylic resin paint layer;
(2) spraying finish paint on the wet acrylic resin paint layer, and baking to form a middle paint layer and a finish paint layer on the primer layer in sequence;
(3) and spraying varnish on the finish paint layer, and baking to form a varnish layer on the finish paint layer.
In some of these embodiments, the method of making a composite paint structure, in step (2), comprises the steps of:
spraying a color register finishing coat on the color register area on the wet acrylic resin paint layer, and baking to obtain a middle paint layer and a color register finishing paint layer, wherein the color register finishing coat is formed on the color register area on the middle paint layer;
and shielding the color register top coat layer, spraying basic top coat on the non-color register area on the intermediate coat layer, and flashing to form a basic top coat layer on the non-color register area on the intermediate coat layer.
In some of these embodiments, the method of making a composite paint structure, in step (3), comprises the steps of:
and removing the shielding, spraying varnish on the color register top coat layer and the basic top coat layer, and baking to form a varnish layer on the color register top coat layer and the basic top coat layer.
Compared with the prior art, the acrylic resin paint has the following beneficial effects:
the acrylic resin paint takes the acrylic resin A and the acrylic resin B as main materials, and the molecular weights of the acrylic resin A and the acrylic resin B are controlled, so that the anti-rewet performance and the smoothness of the acrylic resin paint are improved; the adhesive force of the acrylic resin paint can be effectively improved by matching the amino resin A and the amino resin B with different molecular weights; the flexibility and the cracking resistance of the acrylic resin paint are effectively improved by matching with polyester resin; matched with anti-sagging resin, the acrylic resin paint is favorable for directional molding; on the basis, the anti-sagging resin is combined with the anti-settling agent, so that the acrylic resin paint has better anti-settling property; the anti-settling agent is combined with the dispersing agent, so that the filler has better dispersibility in the resin, and the combination of the filler and the dispersing agent is favorable for controlling the viscosity of the acrylic resin paint and improving the gloss of the acrylic resin paint; and the filler is combined with diethylene glycol monobutyl ether containing a specific solvent, so that the leveling property and the stability of the acrylic resin paint are better. Acrylic resin A and acrylic resin B with different molecular weights, anti-sagging resin, polyester resin, amino resin A and amino resin B with different molecular weights, a dispersing agent, an anti-settling agent, a filling agent and a specific solvent are acted together according to a specific proportion, so that the acrylic resin paint has better anti-rewet capacity and better wet-on-wet matching performance with a chromatography finish paint, and the obtained acrylic resin paint does not need to be baked independently after being sprayed with a middle coat, and is baked after being continuously sprayed with the finish paint, and the appearance, stability, hardness, adhesive force, flexibility, stone impact resistance, impact resistance and weather resistance of the acrylic resin paint meet the requirements.
When the acrylic resin paint is used in an automobile color register process, the one-time baking procedure can be reduced, the length of a production line is reduced, the manufacturing cost is reduced, the energy consumption is reduced, and the production efficiency is improved.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific examples. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The weight of the related components mentioned in the description of the embodiments of the present invention may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present invention as long as it is in accordance with the description of the embodiments of the present invention. Specifically, the weight described in the description of the embodiment of the present invention may be a unit of mass known in the chemical industry field, such as μ g, mg, g, and kg.
An embodiment of the present invention provides a method for preparing a composite paint structure, including steps S10 to S20.
Step S10: spraying acrylic resin paint on the primer layer, and leveling to obtain a wet acrylic resin paint layer; the acrylic resin paint comprises the following components in parts by weight:
15-30 parts of acrylic resin A, 15-20 parts of acrylic resin B, 5-15 parts of anti-sagging resin, 20-30 parts of polyester resin, 5-15 parts of amino resin A, 5-15 parts of amino resin B, 1-3 parts of a dispersant, 0.5-4 parts of an anti-settling agent, 5-10 parts of a filler and 22-40 parts of a solvent; the molecular weight of the acrylic resin A is 50000-80000, the molecular weight of the acrylic resin B is 1000-20000, the molecular weight of the amino resin A is 3000-4000, the molecular weight of the amino resin B is 1000-2000, and the solvent comprises diethylene glycol monobutyl ether.
The acrylic resin paint takes the acrylic resin A and the acrylic resin B as main materials, and the molecular weights of the acrylic resin A and the acrylic resin B are controlled, so that the anti-rewet performance and the smoothness of the acrylic resin paint are improved; the adhesive force of the acrylic resin paint can be effectively improved by matching the amino resin A and the amino resin B with different molecular weights; the flexibility and the cracking resistance of the acrylic resin paint are effectively improved by matching with polyester resin; matched with anti-sagging resin, the acrylic resin paint is favorable for directional molding; the anti-sagging resin and the anti-settling agent are combined, so that the acrylic resin paint has better anti-settling property; furthermore, the anti-settling agent is combined with the dispersing agent, so that the dispersibility of the filler in the resin is better, and the combination of the filler and the dispersing agent is favorable for controlling the viscosity of the acrylic resin paint and improving the gloss of the acrylic resin paint; and the filler is combined with diethylene glycol monobutyl ether containing a specific solvent, so that the leveling property and the stability of the acrylic resin paint are better. Acrylic resin A and acrylic resin B with different molecular weights, anti-sagging resin, polyester resin, amino resin A and amino resin B with different molecular weights, a dispersing agent, an anti-settling agent, a filling agent and a specific solvent are acted together according to a specific proportion, so that the acrylic resin paint has better anti-rewet capacity and better wet-on-wet matching performance with a color register finish paint, and the obtained acrylic resin paint does not need to be baked independently after being sprayed with a middle coat, and is baked after being continuously sprayed with the finish paint, and the appearance, stability, hardness, adhesive force, flexibility, stone impact resistance, impact resistance and weather resistance of the paint meet the requirements; the one-time drying procedure is reduced, the length of a production line is reduced, the manufacturing cost is reduced, the energy consumption is reduced, and the production efficiency is improved.
It can be understood that in step S10, after spraying the acrylic paint on the primer paint, only leveling is needed, and no baking is needed, and a wet film, i.e., a wet acrylic paint layer, is obtained.
In some examples, in step S10, the leveling time is 80S to 90S.
In some examples, in step S10, the primer may be obtained by means including, but not limited to, electrophoresis. Further, cathode electrophoresis is firstly carried out, and then baking is carried out for 10min to 30min at 160 ℃ to 180 ℃. Optionally baking at 170 deg.C for 20 min.
Step S20: and (4) spraying finish paint on the wet acrylic resin paint layer obtained in the step (S10), and baking to form an intermediate paint layer and a finish paint layer on the primer paint layer in sequence.
In some examples, in step S20, the baking temperature is 140 ℃ to 150 ℃ and the baking time is 20min to 30 min. Optionally, the baking temperature is 140 ℃ and the baking time is 30 min; or baking at 150 deg.C for 20 min.
In some examples, step S20 includes steps S21-S22.
Step S21: and (4) spraying the color register finishing paint on the color register area on the wet acrylic resin paint layer obtained in the step (S10), and baking to obtain a middle paint layer and a color register finishing paint layer, wherein the color register finishing paint layer is formed in the color register area on the middle paint layer.
In some examples, in step S21, the baking temperature is 140 ℃ to 150 ℃ and the baking time is 20min to 30 min.
Optionally, in step S21, the baking temperature is 140 ℃ and the baking time is 30 min; or baking at 150 deg.C for 20 min.
Step S22: masking the pigmented topcoat layer, spraying a base topcoat over the non-pigmented areas on the basecoat layer, and flashing to dry to form a base topcoat layer over the non-pigmented areas on the basecoat layer.
It can be understood that steps S21-S22 result in a colored paint structure, which includes a primer layer, a middle paint layer and a top paint layer, which are sequentially disposed, the middle paint layer has a colored region and a non-colored region, the top paint layer includes a colored top paint layer and a basic top paint layer, the colored top paint layer is disposed in the colored region, and the basic top paint layer is disposed in the non-colored region.
In some examples, the flash drying temperature is 80 ℃ and the time is 3min to 5min in step S22.
Step S30: and spraying varnish on the surface paint layer, and baking to form a varnish layer on the surface paint layer.
In some examples, in step S30, the baking temperature is 140 ℃ to 150 ℃ and the baking time is 20min to 30 min.
Optionally, in step S30, the baking temperature is 140 ℃ and the baking time is 30 min; or baking at 150 deg.C for 20 min.
In some examples, step S30 includes the following steps:
removing the shielding, spraying varnish on the color register top coat layer and the basic top coat layer, and baking to form varnish layers on the color register top coat layer and the basic top coat layer.
The invention provides a composite paint structure, which comprises a primer layer, a middle paint layer, a finish paint layer and a clear paint layer which are sequentially arranged, wherein the raw material of the middle paint layer is the acrylic resin paint.
In some examples, the composite paint structure has a color register region and a non-color register region on the middle paint layer, the top paint layer includes a color register top paint layer and a basic top paint layer, the color register top paint layer is arranged on the color register region, and the basic top paint layer is arranged on the non-color register region.
Correspondingly, one embodiment of the invention provides acrylic resin paint which comprises the following components in parts by weight:
15-30 parts of acrylic resin A, 15-20 parts of acrylic resin B, 5-15 parts of anti-sagging resin, 20-30 parts of polyester resin, 5-15 parts of amino resin A, 5-15 parts of amino resin B, 1-3 parts of a dispersant, 0.5-4 parts of an anti-settling agent, 5-10 parts of a filler and 22-40 parts of a solvent; the molecular weight of the acrylic resin A is 50000-80000, the molecular weight of the acrylic resin B is 1000-20000, the molecular weight of the amino resin A is 3000-4000, the molecular weight of the amino resin B is 1000-2000, and the solvent comprises diethylene glycol monobutyl ether.
It will be appreciated that the acrylic paint provided by the present invention may be used in the method of making the composite paint structure and the composite paint structure described above.
It is understood that the parts of the acrylic resin a include, but are not limited to, 15 parts, 16 parts, 18 parts, 20 parts, 21 parts, 22.5 parts, 24 parts, 25 parts, 26 parts, 28 parts, 30 parts; the parts of the acrylic resin B include, but are not limited to, 10 parts, 11 parts, 12.5 parts, 14 parts, 15 parts, 16 parts, 18 parts and 20 parts; the parts of the sag resistant resin include, but are not limited to, 5 parts, 6 parts, 7.5 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12.5 parts, 14 parts, 15 parts; the parts of the polyester resin include, but are not limited to, 20 parts, 21 parts, 22.5 parts, 24 parts, 25 parts, 26 parts, 28 parts, 30 parts; the parts of the amino resin A include, but are not limited to, 5 parts, 6 parts, 7.5 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12.5 parts, 14 parts and 15 parts; the parts of the amino resin B include, but are not limited to, 5 parts, 6 parts, 7.5 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12.5 parts, 14 parts and 15 parts; the parts of the dispersant include, but are not limited to, 1 part, 1.1 parts, 1.5 parts, 1.8 parts, 2 parts, 2.5 parts, 3 parts; the parts of the anti-settling agent include but are not limited to 0.5 part, 0.8 part, 1 part, 1.1 part, 1.5 parts, 1.8 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts and 4 parts; the parts of the filler include, but are not limited to, 5 parts, 6 parts, 7.5 parts, 8 parts, 9 parts and 10 parts; the parts of the solvent include, but are not limited to, 22 parts, 22.5 parts, 24 parts, 25 parts, 26 parts, 28 parts, 30 parts, 32 parts, 35 parts, 36 parts, 38 parts, 40 parts.
In some examples, the acrylic resin paint comprises the following components in parts by weight:
15-25 parts of acrylic resin A, 15-20 parts of acrylic resin B, 5-9 parts of anti-sagging resin, 25-29 parts of polyester resin, 8 parts of amino resin A, 11-16 parts of amino resin B, 1-3 parts of dispersing agent, 8-10 parts of filler and 25-35 parts of solvent.
In some examples, the acrylic resin paint comprises the following components in parts by weight:
18-22 parts of acrylic resin A, 18-20 parts of acrylic resin B, 8-9 parts of anti-sagging resin, 25-27 parts of polyester resin, 8 parts of amino resin A, 11-12 parts of amino resin B, 1-2 parts of dispersing agent, 9-10 parts of filler and 28-32 parts of solvent.
In some specific examples, the acrylic resin paint comprises the following components in parts by weight:
20 parts of acrylic resin A, 20 parts of acrylic resin B, 9 parts of anti-sagging resin, 25 parts of polyester resin, 8 parts of amino resin A, 11 parts of amino resin B, 1 part of dispersant, 10 parts of filler and 30 parts of solvent.
In some examples, the mass ratio of the polyester resin to the acrylic resin A in the acrylic resin paint is (1-2): 1. It is understood that the mass ratio of polyester resin to acrylic resin a includes, but is not limited to, 1:1, 1.1:1, 1.2:1, 1.25:1, 13:1, 15:1, 16:1, 1.8:1, 1.9:1, 1.93:1, 2: 1.
In some examples, the mass ratio of the polyester resin to the acrylic resin A in the acrylic resin paint is (1.2-2): 1.
In some examples, the molecular weight of the acrylic resin A is 55000-80000, and the molecular weight of the acrylic resin B is 5000-20000 in the acrylic resin paint.
Optionally, the molecular weight of the acrylic resin A is 75000-80000, and the molecular weight of the acrylic resin B is 5000-20000.
In some examples, the molecular weight of the amino resin A is 3000-3500 and the molecular weight of the amino resin B is 1500-2000 in the acrylic resin paint.
In some of these examples, the dispersing agent is selected from at least one of organobentonite and polycarboxylate in the acrylic paint.
It is understood that polycarboxylates include, but are not limited to, polyaminoamide solutions of cationic unsaturated polycarboxylic acids; alternatively, the polycarboxylate is type BYK 130.
In some of these examples, the anti-settling agent is selected from at least one of polyamide wax, oxidized polyethylene wax, and fumed silica in the acrylic lacquer. Optionally, the anti-settling agent is a mixture of polyamide wax, oxidized polyethylene wax, and fumed silica.
In some of these examples, the filler in the acrylic lacquer is nano barium sulfate.
In some examples, the solvent in the acrylic lacquer further includes monohydric alcohols, esters and other alcohol ethers.
It is understood that monohydric alcohol solvents include, but are not limited to, butanol, isobutanol; ester solvents include, but are not limited to, ethyl acetate, butyl acetate; other alcohol ether solvents include, but are not limited to, ethylene glycol hexyl ether, ethylene glycol butyl ether.
Optionally, the solvent further comprises at least one of isobutanol, butyl acetate, and butyl glycol ether.
In some of these examples, the sag resistant resin in the acrylic paint is selected from at least one of RC (hydroxyethyl methacrylate) resin and NAD (methyl 3-methoxypropionate) resin.
On the basis of combining the acrylic resin A and the acrylic resin B with different molecular weights and combining the amino resin A and the amino resin B with different molecular weights, the anti-settling agent of a specific kind is combined with the anti-sagging resin, so that the anti-settling property of the acrylic resin paint can be further improved; the anti-settling agent is matched with a specific dispersant, a filler and a solvent, so that the gloss, the leveling property and the stability of the acrylic resin paint can be further improved, and the hardness, the adhesive force, the flexibility, the stone impact resistance, the impact resistance and the weather resistance of the acrylic resin paint can be further improved.
In some examples, the acrylic resin paint further comprises 0.5-2 parts by weight of cosolvent, 0.1-0.5 part by weight of defoamer and 0.001-0.005 part by weight of ultraviolet absorber.
It is understood that co-solvents include, but are not limited to, acetamide, sodium benzoate, isooctanol, and the like; defoamers include, but are not limited to, organosiloxanes, polyethers, higher alcohols; ultraviolet light absorbers include, but are not limited to, salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, triazines, and the like.
Optionally, the cosolvent is isooctanol.
Optionally, the antifoaming agent is a high carbon alcohol. Further, the defoaming agent is benzoin.
Optionally, the ultraviolet light absorber is a benzotriazole.
An embodiment of the present invention provides a method for preparing an acrylic resin paint, including the steps of:
providing raw materials according to the components of the acrylic resin paint;
mixing acrylic resin A, acrylic resin B, anti-sagging resin, polyester resin, amino resin A, amino resin B, dispersant, anti-settling agent, filler and solvent.
In some examples, the above raw materials are mixed under stirring in a method for preparing an acrylic resin paint. Furthermore, the stirring speed is 500 r/min-1000 r/min.
It is further understood that when the acrylic resin paint further includes a co-solvent, a defoaming agent and an ultraviolet light absorber, the co-solvent, the defoaming agent and the ultraviolet light absorber are added and mixed.
The components of the acrylic resin paint act synergistically according to a specific proportion, the acrylic resin paint does not need to be baked independently, the acrylic resin paint is baked after being continuously sprayed with finish paint, and the appearance, the stability, the hardness, the adhesive force, the flexibility, the stone impact resistance, the impact resistance and the weather resistance of the acrylic resin paint meet the requirements. Compared with the traditional acrylic resin paint, the one-time drying procedure can be reduced, the length of a production line is reduced, the manufacturing cost is reduced, the energy consumption is reduced, and the production efficiency is improved.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Hereinafter, the acrylic resin paint, the composite paint structure and the method of preparing the same according to the present invention are exemplified, and it is understood that the acrylic resin paint, the composite paint structure and the method of preparing the same according to the present invention are not limited to the following examples.
Example 1
Preparing raw materials: acrylic resin A 1 20 parts of (thermosetting acrylic resin copolymer, molecular weight of 75000-80000, Hunan Jiangxiang coating Co., Ltd., AC-1053) and acrylic resin B 1 20 parts (thermosetting acrylic resin copolymer, molecular weight 5000-20000, Hunan Jiangxuan paint Co., Ltd., AC-1032), 9 parts of RC resin (hydroxyethyl methacrylate, Hunan Jiangxuan paint Co., Ltd.), 25 parts of polyester resin (Hunan Jiangxian paint Co., Ltd., FU-214P), 8 parts of amino resin A (molecular weight 3000-3500, Hunan Jiangxian paint Co., Ltd., MEH-68), 11 parts of amino resin B (molecular weight 1500-2000, Hunan Jiangxian paint Co., Ltd., ME-705P, 0.5 part of organic bentonite, 1 part of polyamide wax, 1 part of oxidized polyethylene wax, 1 part of isooctanol, 10 parts of nano barium sulfate, 0.005 part of benzotriazole, 0.5 part of benzil ketone, 0.5 part of cationic type polyaminoamide solution of unsaturated polycarboxylic acid (BYK130), 1 part of fumed silica, and 1 part of cationic type unsaturated polycarboxylic acid, 10 parts of ethylene glycol butyl ether, 10 parts of butyl acetate, 5 parts of diethylene glycol butyl ether and 5 parts of isobutanol。
Stirring the acrylic resin A at 500 r/min-1000 r/min 1 Acrylic resin B 1 An RC sagging resistant resin, a polyester resin, an amino resin A, an amino resin B, organic bentonite, polyamide wax, oxidized polyethylene wax, isooctanol, nano barium sulfate, benzotriazole, acrylic esters, polycarboxylate, fumed silica, ethylene glycol butyl ether, butyl acetate, diethylene glycol butyl ether and isobutanol are mixed to obtain an acrylic resin paint.
Example 2
The method is basically the same as example 1, except that the raw materials are as follows:
acrylic resin A 1 20 parts of acrylic resin B 1 20 parts of NAD resin (Hunan Jiangxi coating Co., Ltd.), 9 parts of polyester resin, 25 parts of amino resin A8 parts, amino resin B11 parts, 0.5 part of organic bentonite, 1 part of polyamide wax, 1 part of oxidized polyethylene wax, 1 part of isooctanol, 10 parts of nano barium sulfate, 0.005 part of benzotriazole, 0.5 part of acrylate, 0.5 part of polycarboxylate, 1 part of fumed silica, 10 parts of butyl cellosolve, 10 parts of butyl acetate, 5 parts of butyl cellosolve and 5 parts of isobutanol.
Example 3
The method is basically the same as example 1, except that the raw materials are as follows:
acrylic resin A 1 25 parts of acrylic resin B 1 15 parts, 5 parts of RC resin, 29 parts of polyester resin, 8 parts of amino resin A, 11 parts of amino resin B, 0.5 part of organic bentonite, 1 part of polyamide wax, 1 part of oxidized polyethylene wax, 1 part of isooctanol, 10 parts of nano barium sulfate, 0.005 part of benzotriazole, 0.5 part of acrylate, 0.5 part of polycarboxylate, 1 part of fumed silica, 10 parts of ethylene glycol butyl ether, 10 parts of butyl acetate, 5 parts of diethylene glycol butyl ether and 5 parts of isobutanol.
Example 4
The method is basically the same as example 1, except that the raw materials are as follows:
acrylic resin A 1 15 parts of acrylic resin B 1 15 parts of RC resin, 5 parts of polyester resin, 29 parts of amino resin8 parts of grease A, 16 parts of amino resin B, 0.5 part of organic bentonite, 1 part of polyamide wax, 1 part of oxidized polyethylene wax, 1 part of isooctanol, 10 parts of nano barium sulfate, 0.005 part of benzotriazole, 0.5 part of acrylate, 0.5 part of polycarboxylate, 1 part of fumed silica, 10 parts of ethylene glycol butyl ether, 10 parts of butyl acetate, 5 parts of diethylene glycol butyl ether and 5 parts of isobutanol.
Example 5
The method is basically the same as example 1, except that the raw materials are as follows:
acrylic resin A 2 20 parts of acrylic resin B (molecular weight of 55000-60000, Hunan Jiangxi coating Co., Ltd.) 2 20 parts (molecular weight 5000-10000, Hunan Jiangxi coating Co., Ltd.), 9 parts of RC resin, 25 parts of polyester resin, 8 parts of amino resin A, 11 parts of amino resin B, 0.5 part of organic bentonite, 1 part of polyamide wax, 1 part of oxidized polyethylene wax, 1 part of isooctanol, 10 parts of nano barium sulfate, 0.005 part of benzotriazole, 0.5 part of acrylate, 0.5 part of polycarboxylate, 1 part of fumed silica, 10 parts of ethylene glycol butyl ether, 10 parts of butyl acetate, 5 parts of diethylene glycol butyl ether and 5 parts of isobutanol.
Comparative example 1
The acrylic resin composition is basically the same as that of example 1, except that the acrylic resin A is omitted, and the amount of the acrylic resin B added is the sum of the mass of the acrylic resin A and the mass of the acrylic resin B in example 1.
Comparative example 2
The same as example 1, except that the amino resin B was omitted, the amount of the amino resin A added was the sum of the masses of the amino resin A and the amino resin B in example 1, and the amount of the RC resin added was 5 parts.
Comparative example 3
The same as example 1, except that the amount of the acrylic resin A added was decreased by 10 parts, and the amount of the polyester resin added was increased by 10 parts.
Comparative example 4
Essentially the same as example 1 except that the solvent diethylene glycol butyl ether was not included.
Comparative example 5
The traditional primer coating is adopted, and the components are as follows:
45 parts of saturated polyester, 25 parts of ricinoleic acid modified alkyd resin, 30 parts of aminobutyl etherified resin, 3 parts of epoxy resin, 0.25 part of unsaturated polycarboxylic acid, 1 part of fumed silica, 1 part of anti-sagging resin, 1 part of organosilicon modified acrylic acid leveling aid, 2 parts of isobutanol, 10 parts of ethylene glycol butyl ether and 10 parts of methyl 3-methoxypropionate.
The components of the middle coat paint in each example and comparative example are shown in table 1.
TABLE 1
Wherein, the acrylic resin A 1 The molecular weight of (A) is 75000-80000, and the acrylic resin A 2 Has a molecular weight of 55000 to 60000, and an acrylic resin B 1 Has a molecular weight of 5000 to 20000, and an acrylic resin B 2 The molecular weight of the amino resin B is 5000-10000, the molecular weight of the amino resin A is 3000-3500, and the molecular weight of the amino resin B is 1500-2000.
The acrylic resin paints prepared in the examples and comparative examples 1 to 4 were sprayed on a 70mm by 150mm by 0.8mm steel plate made of the same material as the vehicle body according to the color process a, and the intercoat paint of the comparative example 5 was sprayed on a 70mm by 150mm by 0.8mm steel plate made of the same material as the vehicle body according to the color process B.
Color register process A
Electrophoresis to obtain a bottom paint, polishing → spraying a middle paint, leveling → spraying a color register finish, leveling, baking at 140 ℃ for 30min → shielding a color register area, polishing a middle paint → spraying a base finish, flashing at 80 ℃ for 4min → removing shielding, spraying a varnish, and baking at 140 ℃ for 30 min.
Color register process B
Electrophoresis to obtain a bottom paint, polishing → spraying a middle paint, leveling, baking at 140 ℃ for 30min → spraying a color register finish, leveling, baking at 140 ℃ for 30min → shielding a color register area, polishing the middle paint → spraying a base finish, flashing at 80 ℃ for 4min → removing shielding, spraying a varnish, and baking at 140 ℃ for 30 min.
Comparative example 6
The intermediate coating step is not carried out, and the specific steps are as follows:
electrophoresis to obtain a primer, polishing → spraying a color register finish, leveling, baking at 140 ℃ for 30min → shielding a color register area, polishing a middle coating → spraying a base finish, baking at 140 ℃ for 30min → removing shielding, spraying a varnish, and baking at 140 ℃ for 30 min.
The properties of the intercoat paint of each example and comparative example, and the properties of the intercoat painted steel sheets sprayed with each example and comparative example were tested according to the following criteria:
storage stability: x 10d at 40 ℃; paint film appearance (L/s): the appearance is good, the L value is less than or equal to 6, and the s value is less than or equal to 15; the appearance is general, the L value is more than 6 and less than or equal to 20, and the s value is more than 15 and less than or equal to 40; gloss (G20 °) passed: more than or equal to 85 percent; gloss (G20 °) is excellent: more than or equal to 88 percent; pencil hardness (mitsubishi pencil): HB is more than or equal to; adhesion force (2mm spacing): grade 1; flexibility: less than or equal to 3 mm; stone chip resistance: GM9508P (A method) is not less than grade 7; impact resistance: not less than 50 kg/cm; and (4) qualified water resistance: multiplied by 240 hours at 40 ℃; excellent water resistance: multiplying at 50 ℃ for 240 h; moisture and heat resistance: 50 ℃ multiplied by 95% multiplied by 240 h; salt spray resistance: 1000 h; QUV: g154-2012(2000 h).
The test results are shown in table 2.
TABLE 2
Wherein "NG" indicates failure.
As can be seen from Table 2, comparative example 1 contains no acrylic resin A, the hardness is reduced, and the stone chip resistance test is not qualified; comparative example 2 does not contain the amino resin A, the addition amount of the amino resin B is increased, and the addition amount of the RC resin is reduced, so that the water resistance and the damp-heat resistance are abnormal; comparative example 3 the addition ratio of the acrylic resin A and the polyester resin is changed, the hardness is reduced, and the water resistance, the damp-heat resistance and the aging resistance are abnormal; comparative example 4 contained no solvent, diethylene glycol butyl ether, and stability was abnormal; compared with the prior art, the traditional middle coating is adopted, the middle coating step and the color register finishing coat step need to be baked twice, the efficiency is lower, and the cost is higher; comparative example 6, no intercoat step was performed and the stone chip resistance test failed.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, so as to understand the technical solutions of the present invention specifically and in detail, but not to be understood as the limitation of the protection scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. It should be understood that the technical solutions provided by the present invention, which are obtained by logical analysis, reasoning or limited experiments, are within the scope of the present invention as set forth in the appended claims. Therefore, the protection scope of the patent of the invention is subject to the content of the appended claims, and the description can be used for explaining the content of the claims.
Claims (12)
1. The acrylic resin paint is characterized by comprising the following components in parts by weight:
15-30 parts of acrylic resin A, 15-20 parts of acrylic resin B, 5-15 parts of anti-sagging resin, 20-30 parts of polyester resin, 5-15 parts of amino resin A, 5-15 parts of amino resin B, 1-3 parts of a dispersant, 0.5-4 parts of an anti-settling agent, 5-10 parts of a filler and 22-40 parts of a solvent; the molecular weight of the acrylic resin A is 50000-80000, the molecular weight of the acrylic resin B is 1000-20000, the molecular weight of the amino resin A is 3000-4000, the molecular weight of the amino resin B is 1000-2000, and the solvent comprises diethylene glycol monobutyl ether.
2. The acrylic resin paint as claimed in claim 1, which comprises the following components in parts by weight:
acrylic resin A15-25 parts, acrylic resin B15-20 parts, anti-sagging resin 5-9 parts, polyester resin 25-29 parts, amino resin A8 parts, amino resin B11-16 parts, dispersant 1-3 parts, filler 8-10 parts and solvent 25-35 parts.
3. The acrylic resin paint according to claim 1, wherein the mass ratio of the polyester resin to the acrylic resin A is (1-2): 1.
4. The acrylic resin paint as claimed in any one of claims 1 to 3, wherein the dispersant is at least one selected from the group consisting of organobentonite and polycarboxylate.
5. The acrylic resin paint according to any one of claims 1 to 3, wherein the anti-settling agent is at least one selected from the group consisting of polyamide wax, oxidized polyethylene wax and fumed silica.
6. The acrylic resin paint according to any one of claims 1 to 3, wherein the filler is nano barium sulfate.
7. The acrylic paint according to any one of claims 1 to 3 wherein the solvent further comprises at least one of isobutanol, butyl acetate and ethylene glycol butyl ether.
8. The acrylic resin paint according to any one of claims 1 to 3, further comprising 0.5 to 2 parts by weight of a co-solvent, 0.1 to 0.5 part by weight of an antifoaming agent, and 0.001 to 0.005 part by weight of an ultraviolet absorber.
9. A composite paint structure is characterized by comprising a primer layer, an intermediate paint layer, a finish paint layer and a clear paint layer which are sequentially arranged, wherein the raw material of the intermediate paint layer is the acrylic resin paint as claimed in any one of claims 1 to 8.
10. The composite paint structure of claim 9 wherein the intermediate paint layer has a pigmented region and a non-pigmented region thereon, and the top paint layer comprises a pigmented top paint layer and a base top paint layer, the pigmented top paint layer being disposed in the pigmented region and the base top paint layer being disposed in the non-pigmented region.
11. A preparation method of a composite paint structure is characterized by comprising the following steps:
(1) spraying the acrylic resin paint as claimed in any one of claims 1-8 on the primer layer, and leveling to obtain a wet acrylic resin paint layer;
(2) spraying finish paint on the wet acrylic resin paint layer, and baking to form a middle paint layer and a finish paint layer on the primer layer in sequence;
(3) and spraying varnish on the finish paint layer, and baking to form a varnish layer on the finish paint layer.
12. The method of preparing a composite paint structure according to claim 11 wherein step (2) includes the steps of:
spraying a color register finishing coat on the color register area on the wet acrylic resin paint layer, and baking to obtain a middle paint layer and a color register finishing paint layer, wherein the color register finishing coat is formed on the color register area on the middle paint layer;
masking the chromatic top coat layer, spraying a basic top coat on a non-chromatic region on the intermediate coat layer, and flashing to dry so as to form a basic top coat layer on the non-chromatic region on the intermediate coat layer; in the step (3), the method comprises the following steps: and removing the shielding, spraying varnish on the color register top coat layer and the basic top coat layer, and baking to form a varnish layer on the color register top coat layer and the basic top coat layer.
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