CN110903723A - High-hardness water-based paint, preparation method and application thereof, and woodware - Google Patents
High-hardness water-based paint, preparation method and application thereof, and woodware Download PDFInfo
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- CN110903723A CN110903723A CN201911226452.0A CN201911226452A CN110903723A CN 110903723 A CN110903723 A CN 110903723A CN 201911226452 A CN201911226452 A CN 201911226452A CN 110903723 A CN110903723 A CN 110903723A
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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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- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- C09D7/20—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
- C09D7/43—Thickening agents
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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
- C09D7/47—Levelling agents
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- 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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- 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
- C09D7/63—Additives non-macromolecular organic
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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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- 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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- 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
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Abstract
The invention discloses a high-hardness water-based paint, and a preparation method, application and woodware thereof, and belongs to the technical field of coatings. The water paint comprises the following components in parts by weight: silane modified waterborne polyurethane emulsion, waterborne acrylic emulsion, defoaming agent, wetting agent, waterborne white slurry, wax powder, film-forming assistant, water, defoaming agent, leveling agent and thickening agent; the aqueous white pulp comprises the following components in parts by weight: water, a dispersing agent, a defoaming agent, titanium dioxide, a rheological additive and a pH regulator. The water-based paint provided by the invention adopts water as a solvent, takes the silane modified water-based polyurethane emulsion and the water-based acrylic emulsion as main film forming substances, has excellent hardness of an obtained paint film, is higher than other commercially available single-component water-based paints of the same type, and can play a strong role in decorating and protecting the surface of a wood board. In addition, the paint film obtained by the water paint also has high adhesion and excellent stain resistance.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a high-hardness water-based paint, and a preparation method, application and woodware thereof.
Background
With the change of times and the continuous development of economy, people pay more and more attention to the problems of environmental protection and health. Although the traditional solvent-based paint has better performance, because a large amount of organic solvents are adopted, the solvents are volatilized into the air, so that strong pungent smell is generated, meanwhile, the traditional solvent-based paint threatens human health, and the concept of sustainable development and environmental protection is violated. Water-based coatings using water as a dispersion medium have been paid attention to by people, and are ideal products for replacing traditional solvent-based coatings and are in a vigorous development stage. Compared with the traditional paint, the water-based paint takes water as a dispersing agent, so that the volatilization of harmful gases is greatly reduced, and the water-based paint has the characteristics of environmental protection, no toxicity, no heavy metal, no flammability, good stability and the like.
However, the existing water-based wood ware has the problems of poor wear resistance, low hardness, easy scratching and the like, so the development prospect of the existing water-based wood ware in the wood ware industry with higher requirements on hardness and wear resistance is severely restricted.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a water-based paint with high hardness to solve the problems set forth in the background art.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a high-hardness water-based paint comprises the following components in parts by weight: 30-50 parts of silane modified waterborne polyurethane emulsion, 20-40 parts of waterborne acrylic emulsion, 0.1-1 part of defoaming agent, 0.1-0.5 part of wetting agent, 20-30 parts of waterborne white slurry, 1-5 parts of wax powder, 2-9 parts of film-forming assistant, 1-10 parts of water, 0.1-0.5 part of defoaming agent, 0.1-0.5 part of flatting agent and 0.1-0.5 part of thickening agent; the aqueous white pulp comprises the following components in parts by weight: 15-25 parts of water, 1-10 parts of dispersing agent, 0.1-0.5 part of defoaming agent, 70-80 parts of titanium dioxide, 0.1-0.5 part of rheological additive and 0.1-0.5 part of pH regulator.
As a preferable scheme of the embodiment of the invention, the water-based paint comprises the following components in parts by weight: 35 parts of silane modified waterborne polyurethane emulsion, 25 parts of waterborne acrylic emulsion, 0.5 part of defoaming agent, 0.3 part of wetting agent, 25 parts of waterborne white slurry, 2 parts of wax powder, 4 parts of film-forming assistant, 7.5 parts of water, 0.2 part of defoaming agent, 0.2 part of flatting agent and 0.3 part of thickening agent.
As another preferable scheme of the embodiment of the invention, the white pulp comprises the following components in parts by weight: 19.5 parts of water, 5 parts of dispersing agent, 0.3 part of defoaming agent, 75 parts of titanium dioxide, 0.1 part of rheological additive and 0.1 part of pH regulator.
As another preferable mode of the embodiment of the present invention, the defoaming agent is a mixture of hydrophobic solids in polyethylene glycol and defoaming polysiloxane; the wetting agent is polyether modified siloxane; the defoaming agent is polyether siloxane copolymer; the leveling agent is polyether modified organic silicon.
As another preferred aspect of the embodiments of the present invention, the thickener is a nonionic polyurethane dispersion; the film-forming assistant is dipropylene glycol methyl ether and/or dipropylene glycol butyl ether.
As another preferred scheme of the embodiment of the present invention, the titanium dioxide is rutile titanium dioxide; the rheological additive is polyether polyurethane associative rheological additive; the pH regulator is 2-amino-2-methyl-1-propanol.
Another object of an embodiment of the present invention is to provide a method for preparing the above water-based paint with high hardness, which includes the following steps:
weighing water, a dispersing agent, a defoaming agent, titanium dioxide, a rheological additive and a pH regulator according to the weight parts for later use;
firstly, stirring and dispersing the water, the dispersing agent, the defoaming agent and the titanium dioxide to obtain a dispersion liquid;
adding a rheological aid and a pH regulator into the dispersion liquid for dispersion to obtain white slurry for later use;
weighing the silane modified waterborne polyurethane emulsion, the waterborne acrylic emulsion, the defoaming agent, the wetting agent, the waterborne white slurry, the wax powder, the film forming auxiliary agent, water, the defoaming agent, the leveling agent and the thickening agent according to the weight parts for later use;
firstly, mixing the silane modified waterborne polyurethane emulsion and the waterborne acrylic emulsion to obtain mixed emulsion;
and (3) adding the defoaming agent, the wetting agent, the white slurry and the wax powder into the mixed emulsion in sequence for dispersion, and then adding the film-forming assistant, the defoaming agent, the leveling agent, the water and the thickening agent into the mixed emulsion in sequence for dispersion and filtration to obtain the water-based paint.
The embodiment of the invention also aims to provide the water-based paint prepared by the preparation method.
The embodiment of the invention also aims to provide an application of the water-based paint in woodware surface processing.
Another object of the embodiments of the present invention is to provide a wooden article, wherein the surface of the wooden article is partially or completely coated with the above water-based paint.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
(1) according to the high-hardness water-based paint provided by the embodiment of the invention, water is used as a solvent, the silane modified water-based polyurethane emulsion and the water-based acrylic emulsion are used as main film forming substances, the emission of Volatile Organic Compounds (VOC) in a system is extremely low, the paint film basically has no pungent odor, the hardness of the obtained paint film is excellent, the paint film is higher than that of other commercially available single-component water-based paints of the same type, and the paint film can play a very strong decoration and protection function on the surface of a wood board. In addition, the paint film obtained by the water paint also has high adhesion and excellent stain resistance.
(2) The defoaming agent adopted in the embodiment of the invention mainly comprises a hydrophobic solid in polyethylene glycol and a foam-breaking polysiloxane mixture, has obvious defoaming effect and does not influence the glossiness and color acceptance of a paint film.
(3) The wetting agent adopted by the embodiment of the invention is polyether modified siloxane, and can play a role in reducing the surface tension of wood.
(4) The defoaming agent adopted by the embodiment of the invention is polyether siloxane copolymer, can prevent the generation of micro bubbles and large bubbles, and has high defoaming efficiency and good compatibility.
(5) The leveling agent adopted in the embodiment of the invention mainly comprises polyether-modified organic silicon, which can improve the lubricity, surface smoothness and gloss of a substrate, reduce the surface tension of a paint film and improve the anti-cratering capability.
(6) The thickening agents adopted by the embodiment of the invention are all nonionic polyurethane dispersoids, the viscosity of the system is increased by forming a stable network structure between the polyurethane dispersoids and titanium dioxide particle molecules,
(7) the rheological additive adopted in the embodiment of the invention is polyether polyurethane associated rheological additive, and can improve the sagging resistance and the splashing resistance of the water paint.
(8) The pH regulator adopted in the embodiment of the invention is 2-amino-2-methyl-1-propanol, has the functions of dispersing, thickening, regulating pH value and the like, also has the antimicrobial (bactericidal) characteristic, can reduce the total amount of VOC (volatile organic compounds), is beneficial to improving the environmental protection performance of the coating, and can prevent titanium dioxide from re-agglomerating when being used as a strong co-dispersing agent in the coating.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious 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.
Example 1
This embodiment provides a high-hardness water-based paint, the preparation method of which includes the steps of:
(1) weighing 150g of water, 10g of dispersing agent, 1g of defoaming agent, 800g of titanium dioxide, 1g of rheological additive and 1g of pH regulator for later use. The main component of the dispersant is alkoxy ammonium salt solution of low molecular weight polycarboxylic acid polymer, and concretely, the dispersant can adopt the commercial Bick BYK-2081; the defoaming agent can be selected from ByK024 which is commercially available, and the main component of the defoaming agent is a mixture of hydrophobic solid in polyethylene glycol and defoaming polysiloxane; the titanium dioxide is general rutile titanium dioxide prepared by a chlorination method, and can be specifically selected from commercially available DuPont R-706; the rheological additive is polyether polyurethane associative rheological additive with 25% of active component, and can be selected from commercial Hamming Siemens 299; the pH regulator is 2-amino-2-methyl-1-propanol containing 5% water, specifically commercially available Angus AMP 95; the water is deionized water.
(2) Selecting a proper dispersion tank, putting the water into the dispersion tank, starting a dispersion stirrer, adjusting the rotating speed of the dispersion stirrer to 800r/min for stirring, simultaneously adding the dispersing agent, the defoaming agent and the titanium dioxide in sequence, and adjusting the rotating speed to 1800r/min for dispersing for 30min to obtain a dispersion liquid; in addition, the fineness of the dispersion was measured by a fineness meter, and when the fineness was less than 15 μm, the next step was carried out.
(3) And adding a rheological aid and a pH regulator into the dispersion liquid, and grinding for 10min to obtain white slurry.
(4) Weighing 300g of silane modified waterborne polyurethane emulsion, 400g of waterborne acrylic emulsion, 1g of defoaming agent, 1g of wetting agent, 200g of waterborne white slurry, 10g of wax powder, 20g of film-forming assistant, 10g of water, 1g of defoaming agent, 1g of flatting agent and 1g of thickening agent for later use; wherein, the waterborne organosilicon modified polyurethane emulsion can be a product of SILIKOPUR 8081 with digao; the water-based acrylic emulsion can be selected from European and Japanese numbers
Products of AC 2403; the defoaming agent can be a BYK024 product of Bike Germany, and the main components of the defoaming agent are hydrophobic solid in polyethylene glycol and a mixture of defoaming polysiloxane/AD 01 product of American gas chemical company; wetting agentThe product with the number of BYK349 of Germany Bike company can be adopted, and the main component of the product is polyether modified siloxane; the main component of the wax powder is amino-modified polyethylene wax, and specifically, the product with the serial number of W605G of DuPont company in the United states can be adopted; the film-forming assistant is dipropylene glycol methyl ether; the defoaming agent is a commercial Digao Tego902W polyether siloxane copolymer emulsion; the leveling agent can adopt a BYK333 product of Germany Bike company, which mainly becomes polyether modified organic silicon; the thickening agent can adopt mixed products with the German Ming Ling numbers of PUR44 and PUR64 in equal mass ratio, and the main components of the thickening agent are nonionic polyurethane dispersions.
(5) The silane modified waterborne polyurethane emulsion and the waterborne acrylic emulsion are placed in a dispersion cylinder to be mixed to obtain mixed emulsion.
(6) Starting a dispersion stirrer, regulating the rotating speed of the dispersion stirrer to 1000r/min to stir the mixed solution, simultaneously adding the defoaming agent, the wetting agent, the white slurry and the wax powder into the mixed emulsion in sequence, regulating the rotating speed to 2200r/min to disperse for 20min, then carrying out fineness test by using a fineness meter, when the fineness is less than 15 mu m, then adding the film-forming aid (the film-forming aid needs to be mixed with water in advance according to the mass ratio of 1: 1), the defoaming agent, the leveling agent, the water and the thickening agent into the mixed emulsion in sequence under the stirring of 1000r/min, regulating the rotating speed to 800r/min to disperse for 10min, regulating the rotating speed to 400r/min to disperse for 5min, and filtering to obtain the water-based paint.
Example 2
This embodiment provides a high-hardness water-based paint, the preparation method of which includes the steps of:
(1) 246g of water, 50g of dispersing agent, 3g of defoaming agent, 700g of titanium dioxide, 1g of rheological additive and 1g of pH regulator are weighed for later use. Wherein, the main component of the dispersant is alkoxy ammonium salt solution of low molecular weight polycarboxylic acid polymer, and concretely, the dispersant can be selected from the commercial Bick BYK-2081; the defoaming agent can be selected from ByK024 which is commercially available, and the main component of the defoaming agent is a mixture of hydrophobic solid in polyethylene glycol and defoaming polysiloxane; the titanium dioxide is general rutile titanium dioxide prepared by a chlorination method, and can be specifically selected from commercially available DuPont R-706; the rheological additive is polyether polyurethane associative rheological additive with 25% of active component, and can be selected from commercial Hamming Siemens 299; the pH regulator is 2-amino-2-methyl-1-propanol containing 5% water, specifically commercially available Angus AMP 95; the water is deionized water.
(2) Selecting a proper dispersion tank, putting the water into the dispersion tank, starting a dispersion stirrer, adjusting the rotating speed of the dispersion stirrer to 800r/min for stirring, simultaneously adding the dispersing agent, the defoaming agent and the titanium dioxide in sequence, and adjusting the rotating speed to 1800r/min for dispersing for 30min to obtain a dispersion liquid; in addition, the fineness of the dispersion was measured by a fineness meter, and when the fineness was less than 15 μm, the next step was carried out.
(3) And adding a rheological aid and a pH regulator into the dispersion liquid, and grinding for 10min to obtain white slurry.
(4) Weighing 500g of silane modified waterborne polyurethane emulsion, 200g of waterborne acrylic emulsion, 10g of defoaming agent, 5g of wetting agent, 300g of waterborne white slurry, 50g of wax powder, 90g of film-forming assistant, 100g of water, 5g of defoaming agent, 5g of flatting agent and 5g of thickening agent for later use; wherein, the silane modified waterborne polyurethane emulsion can be a product of commercially available Digao TEGOMER E-Si 2330; the water-based acrylic emulsion can be selected from European and Japanese numbers
Products of AC 2403; the defoaming agent can be a BYK024 product of Bike Germany, and the main components of the defoaming agent are hydrophobic solid in polyethylene glycol and a mixture of defoaming polysiloxane/AD 01 product of American gas chemical company; the wetting agent can adopt a BYK349 product of Germany Bike company, and the main component of the wetting agent is polyether modified siloxane; the wax powder mainly comprises amino modified polyethylene wax, specifically adopting product with serial number of W605G of DuPont of America; the film-forming assistant is dipropylene glycol butyl ether; the defoaming agent is a commercial Digao Tego902W polyether siloxane copolymer emulsion; the leveling agent can adopt a BYK333 product of Germany Bike company, which mainly becomes polyether modified organic silicon; the thickener can be mixed product of PUR44 and PUR64 in equal mass ratio, and its main components are nonionicA polyurethane dispersion.
(5) The silane modified waterborne polyurethane emulsion and the waterborne acrylic emulsion are placed in a dispersion cylinder to be mixed to obtain mixed emulsion.
(6) Starting a dispersion stirrer, regulating the rotating speed of the dispersion stirrer to 1000r/min to stir the mixed solution, simultaneously adding the defoaming agent, the wetting agent, the white slurry and the wax powder into the mixed emulsion in sequence, regulating the rotating speed to 2200r/min to disperse for 20min, then carrying out fineness test by using a fineness meter, when the fineness is less than 15 mu m, then adding the film-forming aid (the film-forming aid needs to be mixed with water in advance according to the mass ratio of 1: 1), the defoaming agent, the leveling agent, the water and the thickening agent into the mixed emulsion in sequence under the stirring of 1000r/min, regulating the rotating speed to 800r/min to disperse for 10min, regulating the rotating speed to 400r/min to disperse for 5min, and filtering to obtain the water-based paint.
Example 3
This embodiment provides a high-hardness water-based paint, the preparation method of which includes the steps of:
(1) weighing 195g of water, 50g of dispersing agent, 3g of defoaming agent, 750g of titanium dioxide, 1g of rheological additive and 1g of pH regulator for later use. Wherein, the main component of the dispersant is an aqueous solution of a copolymer containing high pigment affinity groups; the defoaming agent can be commercial Digao
3800 the main ingredient is hydrophobic solid of polyethylene glycol and foam breaking polysiloxane mixture; the titanium dioxide is general rutile titanium dioxide prepared by a chlorination method, and can be specifically selected from commercially available DuPont R-706; the rheological additive is polyether polyurethane associative rheological additive with 25% of active component, and can be selected from commercial Hamming Siemens 299; the pH regulator is 2-amino-2-methyl-1-propanol containing 5% water, specifically commercially available Angus angusmamp 95; the water is deionized water.
(2) Selecting a proper dispersion tank, putting the water into the dispersion tank, starting a dispersion stirrer, adjusting the rotating speed of the dispersion stirrer to 800r/min for stirring, simultaneously adding the dispersing agent, the defoaming agent and the titanium dioxide in sequence, and adjusting the rotating speed to 1800r/min for dispersing for 30min to obtain a dispersion liquid; in addition, the fineness of the dispersion was measured by a fineness meter, and when the fineness was less than 15 μm, the next step was carried out.
(3) And adding a rheological aid and a pH regulator into the dispersion liquid, and grinding for 10min to obtain white slurry.
(4) Weighing 350g of silane modified waterborne polyurethane emulsion, 250g of waterborne acrylic emulsion, 5g of defoaming agent, 3g of wetting agent, 250g of waterborne white slurry, 20g of wax powder, 40g of film-forming assistant, 75g of water, 2g of defoaming agent, 2g of flatting agent and 3g of thickening agent for later use; wherein, remark: the defoamer grade 0-worst grade, grade 5-best grade (grade 4 is qualified) can be selected from BYK024 product of Bike Germany and AD01 product of American gas chemical company, which are mixed according to the mass ratio of 3:2, and mainly comprises hydrophobic solid in polyethylene glycol and defoaming polysiloxane mixture; the wetting agent can adopt a BYK349 product of Germany Bike company, and the main component of the wetting agent is polyether modified siloxane; the main component of the wax powder is amino-modified polyethylene wax, and specifically, the product with the serial number of W605G of DuPont company in the United states can be adopted; the film-forming assistant is a mixture of dipropylene glycol methyl ether and dipropylene glycol butyl ether in equal mass ratio; the defoaming agent is a commercial Digao Tego902W polyether siloxane copolymer emulsion; the leveling agent can adopt a BYK333 product of Germany Bike company, which mainly becomes polyether modified organic silicon; the thickener can be a product mixed by weight ratio of 2:1, which is prepared by mixing products of German Ming Ling numbers PUR44 and PUR64, and the main components of the thickener are nonionic polyurethane dispersion.
(5) The silane modified waterborne polyurethane emulsion and the waterborne acrylic emulsion are placed in a dispersion cylinder to be mixed to obtain mixed emulsion.
(6) Starting a dispersion stirrer, regulating the rotating speed of the dispersion stirrer to 1000r/min to stir the mixed solution, simultaneously adding the defoaming agent, the wetting agent, the white slurry and the wax powder into the mixed emulsion in sequence, regulating the rotating speed to 2200r/min to disperse for 20min, then carrying out fineness test by using a fineness meter, when the fineness is less than 15 mu m, then adding the film-forming aid (the film-forming aid needs to be mixed with water in advance according to the mass ratio of 1: 1), the defoaming agent, the leveling agent, the water and the thickening agent into the mixed emulsion in sequence under the stirring of 1000r/min, regulating the rotating speed to 800r/min to disperse for 10min, regulating the rotating speed to 400r/min to disperse for 5min, and filtering to obtain the water-based paint.
Example 4
This embodiment provides a high-hardness water-based paint, the preparation method of which includes the steps of:
(1) weighing 195g of water, 50g of dispersing agent, 3g of defoaming agent, 750g of titanium dioxide, 1g of rheological additive and 1g of pH regulator for later use. Wherein, the main component of the dispersant is alkoxy ammonium salt solution of low molecular weight polycarboxylic acid polymer; the defoaming agent can be a commercial Bike BYK2081, and the main component of the defoaming agent is a mixture of hydrophobic solid in polyethylene glycol and foam breaking polysiloxane; the titanium dioxide is rutile titanium dioxide obtained by processing zirconia/alumina, and can be specifically selected from commercially available Cormeyl CR-828; the rheological additive is polyether polyurethane associative rheological additive with 25% of active component, and can be selected from commercial Hamming Siemens 299; the pH regulator is 2-amino-2-methyl-1-propanol containing 5% water, specifically commercially available Angus AMP 95; the water is deionized water.
(2) Selecting a proper dispersion tank, putting the water into the dispersion tank, starting a dispersion stirrer, adjusting the rotating speed of the dispersion stirrer to 800r/min for stirring, simultaneously adding the dispersing agent, the defoaming agent and the titanium dioxide in sequence, and adjusting the rotating speed to 2000r/min for dispersing for 20min to obtain a dispersion liquid; in addition, the fineness of the dispersion was measured by a fineness meter, and when the fineness was less than 15 μm, the next step was carried out.
(3) And adding a rheological aid and a pH regulator into the dispersion liquid, and grinding for 10min to obtain white slurry.
(4) Weighing 350g of silane modified waterborne polyurethane emulsion, 250g of waterborne acrylic emulsion, 5g of defoaming agent, 3g of wetting agent, 250g of waterborne white slurry, 20g of wax powder, 40g of film-forming assistant, 75g of water, 2g of defoaming agent, 2g of flatting agent and 3g of thickening agent for later use; wherein, the waterborne organosilicon modified polyurethane emulsion can be a product of SILIKOPUR 8081 with digao; the aqueous emulsion is a commercially available Dow chemical ROSHIELD 530 aqueous acrylic polymer emulsion; the defoaming agent can be a mixture of BYK024 product of Bike Germany and AD01 product of gas chemical company in a mass ratio of 3:2, and the main components of the defoaming agent are hydrophobic solid in polyethylene glycol and a mixture of defoaming polysiloxane; the wetting agent can adopt a BYK349 product of Germany Bike company, and the main component of the wetting agent is polyether modified siloxane; the main component of the wax powder is amino-modified polyethylene wax; the film-forming assistant is a mixture of dipropylene glycol methyl ether and dipropylene glycol butyl ether in equal mass ratio; the defoaming agent is a commercial Digao Tego902W polyether siloxane copolymer emulsion; the leveling agent can adopt a BYK333 product of Germany Bike company, which mainly becomes polyether modified organic silicon; the thickener can be a product mixed by weight ratio of 2:1, which is prepared by mixing products of German Ming Ling numbers PUR44 and PUR64, and the main components of the thickener are nonionic polyurethane dispersion.
(5) The silane modified waterborne polyurethane emulsion and the waterborne acrylic emulsion are placed in a dispersion cylinder to be mixed to obtain mixed emulsion.
(6) Starting a dispersion mixer, adjusting the rotating speed of the dispersion mixer to 800r/min to stir the mixed solution, simultaneously adding the defoaming agent, the wetting agent, the white slurry and the wax powder into the mixed emulsion in sequence, adjusting the rotating speed to 1800r/min to disperse for 20min, then carrying out fineness test by using a fineness meter, when the fineness is less than 15 mu m, then adding the film-forming auxiliary agent (the film-forming auxiliary agent needs to be mixed with water in advance according to the mass ratio of 1: 1), the defoaming agent, the leveling agent, water and the thickening agent into the mixed emulsion in sequence under the stirring of 1000r/min, adjusting the rotating speed to 800r/min to disperse for 10min, adjusting the rotating speed to 500r/min to disperse for 5min, and filtering to obtain the water-based paint.
Example 5
This embodiment provides a high-hardness water-based paint, the preparation method of which includes the steps of:
(1) weighing 195g of water, 50g of dispersing agent, 3g of defoaming agent, 750g of titanium dioxide, 1g of rheological additive and 1g of pH regulator for later use. Wherein, the main component of the dispersant is an aqueous solution of copolymer containing high pigment affinity group
3800; the defoaming agent can be selected from ByK024 which is commercially available, and the main component of the defoaming agent is a mixture of hydrophobic solid in polyethylene glycol and defoaming polysiloxane; titanium dioxide is rutile titanium dioxide obtained by processing zirconia/alumina, and can be specifically selected from commercially available Cormeyl CR-828; the rheological additive is polyether polyurethane associative rheological additive with 25% of active component, and can be selected from commercial Hamming Siemens 299; the pH regulator is 2-amino-2-methyl-1-propanol containing 5% water, specifically commercially available Angus AMP 95; the water is deionized water.
(2) Selecting a proper dispersion tank, putting the water into the dispersion tank, starting a dispersion stirrer, regulating the rotating speed of the dispersion stirrer to 1200r/min for stirring, simultaneously adding the dispersing agent, the defoaming agent and the titanium dioxide in sequence, and regulating the rotating speed to 2000r/min for dispersing for 30min to obtain a dispersion liquid; in addition, the fineness of the dispersion was measured by a fineness meter, and when the fineness was less than 15 μm, the next step was carried out.
(3) And adding a rheological aid and a pH regulator into the dispersion liquid, and grinding for 10min to obtain white slurry.
(4) Weighing 380g of silane modified waterborne polyurethane emulsion, 270g of waterborne acrylic emulsion, 5g of defoaming agent, 3g of wetting agent, 200g of waterborne white slurry, 20g of wax powder, 40g of film-forming assistant, 75g of water, 2g of defoaming agent, 2g of flatting agent and 3g of thickening agent for later use; wherein, the silane modified waterborne polyurethane emulsion can be a product of commercially available Digao TEGOMER E-Si 2330; the water-based acrylic emulsion can be selected from European and Japanese numbers
Products of AC 2403; the defoaming agent can be a mixture of BYK024 product of Bike Germany and AD01 product of gas chemical company in a mass ratio of 3:2, and the main components of the defoaming agent are hydrophobic solid in polyethylene glycol and a mixture of defoaming polysiloxane; the wetting agent can be German BikeThe product of company number BYK349, the main component of which is polyether modified siloxane; the main component of the wax powder is amino-modified polyethylene wax; the film-forming assistant is a mixture of dipropylene glycol methyl ether and dipropylene glycol butyl ether in equal mass ratio; the defoaming agent is a commercial Digao Tego902W polyether siloxane copolymer emulsion; the leveling agent can adopt a BYK333 product of Germany Bike company, which mainly becomes polyether modified organic silicon; the thickener can be a product mixed by weight ratio of 2:1, which is prepared by mixing products of German Ming Ling numbers PUR44 and PUR64, and the main components of the thickener are nonionic polyurethane dispersion.
(5) The silane modified waterborne polyurethane emulsion and the waterborne acrylic emulsion are placed in a dispersion cylinder to be mixed to obtain mixed emulsion.
(6) Starting a dispersion stirrer, regulating the rotating speed of the dispersion stirrer to 1000r/min to stir the mixed solution, simultaneously adding the defoaming agent, the wetting agent, the white slurry and the wax powder into the mixed emulsion in sequence, regulating the rotating speed to 2200r/min to disperse for 20min, then carrying out fineness test by using a fineness meter, when the fineness is less than 15 mu m, then adding the film-forming auxiliary agent (the film-forming auxiliary agent needs to be mixed with water in advance according to the mass ratio of 1: 1), the defoaming agent, the leveling agent, the water and the thickening agent into the mixed emulsion in sequence under the stirring of the rotating speed of 1500r/min to disperse for 10min, regulating the rotating speed to 500r/min to disperse for 5min, and filtering to obtain the water-based paint.
Comparative example 1
This comparative example provides a single-component aqueous paint of the same type of a brand currently on the market.
Comparative example 2
The comparative example changes the paint preparation process on the basis of the example 3, and the specific operation is as follows:
(1) weighing 380g of aqueous polyurethane emulsion, 270g of aqueous acrylic emulsion, 5g of defoaming agent, 3g of wetting agent, 20g of wax powder, 40g of film-forming aid, 109g of water, 2.6g of defoaming agent, 2.2g of flatting agent, 3g of thickening agent, 15g of dispersing agent, 150g of titanium dioxide and 0.2g of pH regulator for later use; wherein, the waterborne organosilicon modified polyurethane emulsion can be a product of SILIKOPUR 8081 with digao; the water-based acrylic emulsion can be selected from Oubaodi weavesNumber is
Products of AC 2403; the main component of the defoaming agent is hydrophobic solid in polyethylene glycol and foam breaking polysiloxane mixture, and Digao Tego755W and Bikk BYK024 can be selected; the dispersant is an aqueous solution of copolymer containing high pigment affinity group, and is selected from commercially available digao
3800; the wetting agent can adopt a BYK349 product of Germany Bike company, and the main component of the wetting agent is polyether modified siloxane; the wax powder can be a product of DuPont company in the United states with the serial number of W605G, and the main component of the wax powder is amino-modified polyethylene wax; the film-forming assistant is a mixture of dipropylene glycol methyl ether and dipropylene glycol butyl ether; the defoaming agent is polyether siloxane copolymer emulsion; the leveling agent mainly becomes polyether modified organic silicon; the thickener can be a mixture of products with the German Ming and PuR44 and PUR64 in a mass ratio of 2:1, and the main components of the thickener are nonionic polyurethane dispersion and a product with the Hamming Silo and Rheolate299, and the main component of the thickener is polyether polyurethane associative rheological additive with 25% of active components. The pH regulator is 2-amino-2-methyl-1-propanol containing 5% water, and is commercially available Angus angusmamp 95. The water is deionized water.
(2) The aqueous polyurethane emulsion and the aqueous acrylic emulsion are placed in a dispersion cylinder to be mixed to obtain mixed emulsion.
(3) Starting a dispersion stirrer, regulating the rotating speed of the dispersion stirrer to 1200r/min to stir the mixed solution, simultaneously adding the water, the defoaming agent, the wetting agent, the dispersing agent, the titanium dioxide and the wax powder into the mixed emulsion in sequence, regulating the rotating speed to 2200r/min, adding pickaxe beads with the diameter of 0.6mm to disperse for 50min, then carrying out fineness test by using a fineness meter, when the fineness is less than 15 mu m, then adding the film-forming aid (the film-forming aid needs to be mixed with the water in advance according to the mass ratio of 1: 1) under the stirring of 1400r/min in sequence, regulating the rotating speed to 1000r/min to disperse for 10min, regulating the rotating speed to 500r/min to disperse for 5min, and filtering to obtain the water-based paint.
Comparative example 3
In the comparative example, the rheological additive component is removed on the basis of the above example, and the specific operation is as follows:
(1) 246g of water, 50g of dispersing agent, 3g of defoaming agent, 700g of titanium dioxide and 1g of pH regulator are weighed for later use. Wherein, the dispersant is a commercial Bick BYK-2081, and the main component of the dispersant is an alkoxy ammonium salt solution of a low molecular weight polycarboxylic acid polymer; the defoaming agent can be selected from ByK024 which is commercially available, and the main component of the defoaming agent is a mixture of hydrophobic solid in polyethylene glycol and defoaming polysiloxane; the titanium dioxide is general rutile titanium dioxide prepared by a chlorination method, and can be specifically selected from commercially available DuPont R-706; the pH regulator is 2-amino-2-methyl-1-propanol containing 5% water, specifically commercially available Angus AMP 95; the water is deionized water.
(2) Selecting a proper dispersion tank, putting the water into the dispersion tank, starting a dispersion stirrer, adjusting the rotating speed of the dispersion stirrer to 800r/min for stirring, simultaneously adding the dispersing agent, the defoaming agent and the titanium dioxide in sequence, and adjusting the rotating speed to 1800r/min for dispersing for 30min to obtain a dispersion liquid; in addition, the fineness of the dispersion was measured by a fineness meter, and when the fineness was less than 15 μm, the next step was carried out.
(3) Adding pH regulator into the dispersion, and grinding for 10min to obtain white slurry.
(4) Weighing 500g of aqueous polyurethane emulsion, 200g of aqueous acrylic emulsion, 10g of defoaming agent, 5g of wetting agent, 300g of aqueous white slurry, 50g of wax powder, 90g of film-forming assistant, 110g of water and 5g of defoaming agent for later use; wherein, the waterborne organosilicon modified polyurethane emulsion can be a product of SILIKOPUR 8081 with digao; the water-based acrylic emulsion can be selected from European and Japanese numbers
Products of AC 2403; the defoaming agent can be BYK024 product of Bick Germany, whose main ingredient is hydrophobic solid in polyethylene glycol and foam-breaking polysiloxane mixture/U.S. gasificationThe product of school company under number AD 01; the wetting agent can adopt a BYK349 product of Germany Bike company, and the main component of the wetting agent is polyether modified siloxane; the wax powder can be a product of DuPont company in the United states with the serial number of W605G, and the main component of the wax powder is amino-modified polyethylene wax; the film-forming assistant is dipropylene glycol butyl ether; the defoaming agent is a commercial Digao Tego902W polyether siloxane copolymer emulsion.
(5) The aqueous polyurethane emulsion and the aqueous acrylic emulsion are placed in a dispersion cylinder to be mixed to obtain mixed emulsion.
(6) Starting a dispersion stirrer, regulating the rotating speed of the dispersion stirrer to 1000r/min to stir the mixed solution, simultaneously adding the defoaming agent, the wetting agent, the white slurry and the wax powder into the mixed emulsion in sequence, regulating the rotating speed to 2200r/min to disperse for 20min, then carrying out fineness test by using a fineness meter, when the fineness is less than 15 mu m, then adding the film-forming aid (the film-forming aid needs to be mixed with water in advance according to the mass ratio of 1: 1), the defoaming agent and the water into the mixed solution in sequence under the stirring of 1000r/min, regulating the rotating speed to 800r/min to disperse for 10min, regulating the rotating speed to 400r/min to disperse for 5min, and filtering to obtain the water-based paint.
Coating the water-based paints provided in the embodiments 3-5 and the comparative examples 1-3 on the surface of a wood respectively in a spraying manner under the same conditions to obtain corresponding paint films, performing a pencil hardness test on the obtained paint films according to a detection standard in GB/T6739 & lt & gtSlim & amp, Pencil method for paint film hardness determination 2006 under the same conditions, performing an adhesion test on the obtained paint films according to a detection standard in GB/T9286 & lt & gtplus 1998 & gt grid test for paint films of color paint and varnish, performing a stain resistance test on the obtained paint films according to a detection standard in GB/T23999 & lt & gtplus 2009 & gtwaterborne wood coatings (specifically, 2 cross-shaped water-based paints are directly sprayed on a UV white background, a second water-based paint is sprayed after polishing is not needed, and the obtained paint films are placed for 7 days and are completely dried and then are tested according to the national standard GB/T23999 & lt & gtal 2009, the test results are shown in table 1 below.
TABLE 1
As is apparent from the test data in table 1 above, compared with the existing commercially available water-based paint of the same type, the water-based paint provided by the embodiment of the present invention has the advantages of higher hardness, better adhesion and better stain resistance. In addition, because the titanium dioxide of the comparative example 2 is directly dispersed in the resin, more dispersing agents are needed to increase the cost firstly, the dispersing time is increased, the time is wasted, the dispersing effect is poor finally, the surface effect of the finish paint is poor, and the hand feeling is rough; in the comparative example 3, due to the lack of the rheological additive, firstly, the leveling property of the paint film is poor, the defects of shrinkage cavity, oil pits, orange peel and the like can occur, the corresponding performances such as hardness, adhesive force, resistance and the like can be correspondingly reduced, and secondly, the rheological additive also has the function of preventing sedimentation, so that the paint is convenient to transport and spray.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. The high-hardness water-based paint is characterized by comprising the following components in parts by weight: 30-50 parts of silane modified waterborne polyurethane emulsion, 20-40 parts of waterborne acrylic emulsion, 0.1-1 part of defoaming agent, 0.1-0.5 part of wetting agent, 20-30 parts of waterborne white slurry, 1-5 parts of wax powder, 2-9 parts of film-forming assistant, 1-10 parts of water, 0.1-0.5 part of defoaming agent, 0.1-0.5 part of flatting agent and 0.1-0.5 part of thickening agent; the aqueous white pulp comprises the following components in parts by weight: 15-25 parts of water, 1-10 parts of dispersing agent, 0.1-0.5 part of defoaming agent, 70-80 parts of titanium dioxide, 0.1-0.5 part of rheological additive and 0.1-0.5 part of pH regulator.
2. The water-based paint with high hardness according to claim 1, wherein the water-based paint comprises the following components in parts by weight: 35 parts of silane modified waterborne polyurethane emulsion, 25 parts of waterborne acrylic emulsion, 0.5 part of defoaming agent, 0.3 part of wetting agent, 25 parts of waterborne white slurry, 2 parts of wax powder, 4 parts of film-forming assistant, 7.5 parts of water, 0.2 part of defoaming agent, 0.2 part of flatting agent and 0.3 part of thickening agent.
3. The water-based paint with high hardness according to claim 1 or 2, wherein the white paste comprises the following components in parts by weight: 19.5 parts of water, 5 parts of dispersing agent, 0.3 part of defoaming agent, 75 parts of titanium dioxide, 0.1 part of rheological additive and 0.1 part of pH regulator.
4. A high-hardness water-based paint as claimed in claim 1 or 2, wherein said defoaming agent is a mixture of hydrophobic solids in polyethylene glycol and a defoaming polysiloxane; the wetting agent is polyether modified siloxane; the defoaming agent is polyether siloxane copolymer; the leveling agent is polyether modified organic silicon.
5. The high-hardness aqueous paint according to claim 1 or 2, wherein the thickener is a nonionic polyurethane dispersion; the film-forming assistant is dipropylene glycol methyl ether and/or dipropylene glycol butyl ether.
6. The water-based paint with high hardness according to claim 1, wherein the titanium dioxide is rutile type titanium dioxide; the rheological additive is polyether polyurethane associative rheological additive; the pH regulator is 2-amino-2-methyl-1-propanol.
7. A method for preparing the high-hardness water-based paint according to any one of claims 1 to 6, comprising the steps of:
weighing water, a dispersing agent, a defoaming agent, titanium dioxide, a rheological additive and a pH regulator according to the weight parts for later use;
firstly, stirring and dispersing the water, the dispersing agent, the defoaming agent and the titanium dioxide to obtain a dispersion liquid;
adding a rheological aid and a pH regulator into the dispersion liquid for dispersion to obtain white slurry for later use;
weighing the silane modified waterborne polyurethane emulsion, the waterborne acrylic emulsion, the defoaming agent, the wetting agent, the waterborne white slurry, the wax powder, the film forming auxiliary agent, water, the defoaming agent, the leveling agent and the thickening agent according to the weight parts for later use;
firstly, mixing the silane modified waterborne polyurethane emulsion and the waterborne acrylic emulsion to obtain mixed emulsion;
and (3) adding the defoaming agent, the wetting agent, the white slurry and the wax powder into the mixed emulsion in sequence for dispersion, and then adding the film-forming assistant, the defoaming agent, the leveling agent, the water and the thickening agent into the mixed emulsion in sequence for dispersion and filtration to obtain the water-based paint.
8. An aqueous paint prepared by the method of claim 7.
9. Use of the aqueous paint according to any one of claims 1 to 6 and 8 in wood surface processing.
10. A wooden article characterized in that the surface of the wooden article is partially or completely coated with the water-based paint according to any one of claims 1 to 6 and 8.
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| CN111548715A (en) * | 2020-06-15 | 2020-08-18 | 江苏电子信息职业学院 | Preparation method and application of high-light-transmission anti-yellowing plastic coating |
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2019
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| CN111548715A (en) * | 2020-06-15 | 2020-08-18 | 江苏电子信息职业学院 | Preparation method and application of high-light-transmission anti-yellowing plastic coating |
| CN112080028A (en) * | 2020-09-11 | 2020-12-15 | 晋江联兴反光材料有限公司 | Temperature-change waterproof reflective film |
| CN112210264A (en) * | 2020-09-24 | 2021-01-12 | 上海立邦长润发涂料有限公司 | Thick-coatable high-filling water-based single-component transparent primer and preparation method thereof |
| CN112210264B (en) * | 2020-09-24 | 2021-11-02 | 上海立邦长润发涂料有限公司 | Thick-coatable high-filling water-based single-component transparent primer and preparation method thereof |
| CN115260891A (en) * | 2022-09-06 | 2022-11-01 | 谦筑科技(上海)有限公司 | Environment-friendly shell powder coating and preparation process thereof |
| CN115521698A (en) * | 2022-10-27 | 2022-12-27 | 柳州紫荆生态工程科技有限公司 | High-hardness graphene water-based paint and preparation method thereof |
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