CN111320906A - Mechanical spraying water-based wood door damp-proof matte white finish paint and preparation method thereof - Google Patents
Mechanical spraying water-based wood door damp-proof matte white finish paint and preparation method thereof Download PDFInfo
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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
- C09D143/00—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 containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
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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
- C09D7/43—Thickening agents
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C08L2205/00—Polymer mixtures characterised by other features
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Abstract
The invention relates to a mechanical spraying water-based wood door damp-proof matte white finish and a preparation method thereof, belonging to the technical field of wood coatings in the chemical field, wherein the mechanical spraying water-based wood door damp-proof matte white finish comprises the following components in percentage by weight: 38-42% of organic silicon modified acrylic emulsion, 5-15% of polycarbonate polyurethane emulsion, 5-15% of pH regulator AMP-960.1-0.3%, 1.8-5.1% of defoaming agent, 4-10% of film forming assistant, 0.2-0.4% of wetting and leveling agent, 1-3% of deionized water, 0.1-0.3% of associative polyurethane thickener, 1-3% of organic matting agent, 25-30% of aqueous titanium white slurry, 1-3% of rheological inorganic bentonite slurry, 1-2% of epoxy group organosilane and 2-5% of wax emulsion. The preparation method comprises the operations of emulsion compounding, pre-stirring and mixing, pH adjustment, film forming, dispersion and the like. The invention solves the problems of air bubbles, sagging, uneven liquid interface line, adhesive force and the like generated in the mechanical spraying process. Production cost is reduced while production efficiency is improved, national standard safety and environmental protection standards are met, and economic benefits of enterprises are improved.
Description
Technical Field
The invention belongs to the technical field of wood coatings in the chemical field, and particularly relates to a mechanical spraying water-based wood door moisture-proof matte white finish and a preparation method thereof.
Background
With the rapid development of the Chinese wood coating industry, the yield of wood coatings in China is over 160 ten thousand tons in 2018. Wherein, the yield of the water-based wood coating is about 15 ten thousand tons, the proportion is less than 10 percent, and the water-based wood coating which can be applied to wooden doors is less. Along with the implementation of the national macro regulation and control policy, the water-based paint becomes a method for promoting enterprise transformation and upgrading by matching with the steps of energy conservation and emission reduction and the upgrading of industrial transformation and upgrading and combining with the current situations of low industrial automation degree and daily environmental protection pressure; the leadwood door enterprise has started to enter the waterborne wood door coating, and the production line operation is realized by a mechanical spraying mode, so that products with the effect equivalent to that of oily paint are produced, and enter thousands of households such as dream days, Tata wood doors and the like, and the method plays a key factor for strengthening and making the scale of the enterprise, improving the added value of the products and selling points.
At present, the oily wooden door paint in China is mainly oily, and is a paint with low VOCs content for wooden furniture, which is advocated for the new national environmental protection law. According to research, few large-scale enterprises use low-content water-based paint and UV paint, and the water-based paint and the UV paint are combined through the process of UV white bottom and water-based white surface, matched with modern spraying equipment and used for producing wooden doors. Aqueous wood door coatings, including varnishes and white paints, have many properties that need to be gradually improved and perfected, the most typical of which are: firstly, the drying speed is not as fast as that of a solvent-based coating, so that the production efficiency is far lower than that of the solvent-based coating; secondly, the anti-sagging performance is not as good as that of solvent type products, and thick edges and sagging phenomena are easily generated by stacking at the groove joint of the wooden door and the door frame; thirdly, because water has certain surface tension, and the used emulsion contains a plurality of surfactants, when mechanical spraying is carried out, particularly spraying is carried out by a reciprocating machine and a five-axis machine, bubbles are easily generated due to high-pressure spraying, the bubbles are easily sprayed out, the surface effect is very easy to cause poor surface effect, particularly miliaria is caused on the reverse side after the wooden door is overturned, and the sagging resistance and the defoaming property of an aqueous system are important factors restricting the development of the wooden door because of the essential difference of a solvent type system and the aqueous system; and fourthly, the film forming compactness of the water-based paint is poorer than that of the oil-based paint, so that the water resistance and the moisture resistance are poor, and the complaint of consumers is easily caused.
The practical application of the water-based wood door white finish is less than 5% in wood door enterprises, and the environmental protection cost is added to the discharge of VOCs under the pressure of environmental protection, so that the oil-to-water change of various factories is imperative.
The above prior art solutions have the following drawbacks: the aqueous system is a multiphase structure, the surface tension of water is high, various wetting agents need to be added to reduce the surface tension of the water, so that the water can be well wetted and spread, but the deliberate reduction of the surface tension brings a series of problems such as foam stabilization, sagging, gloss reduction, poor water resistance and the like, and the selection of the defoaming agent becomes particularly important, so that the defoaming problem under high thixotropy is solved. Thixotropic and antifoaming, which are contradictory, and how to balance them is the focus of this study.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the mechanical spraying water-based wood door damp-proof matte white finish paint, which solves the problems of bubbles, sagging, uneven liquid interface line, adhesive force and the like generated in the mechanical spraying process. Production cost is reduced while production efficiency is improved, the environmental protection problem is solved, the national standard safety and environmental protection standard can be met, and the economic benefit of enterprises is improved.
The above object of the present invention is achieved by the following technical solutions:
the mechanical spraying water-based wood door damp-proof matte white finish comprises the following components in percentage by weight:
by adopting the technical scheme, the organic silicon modified acrylic emulsion has the characteristics of good drying property, high hardness improvement speed, excellent water resistance, good adhesive force and the like; the polycarbonate polyurethane emulsion has very good wear resistance and pigment coating performance, can improve the color development of the pigment, has a very good auxiliary effect on the improvement of the adhesive force, has good leveling property, and can effectively reduce the defoaming difficulty and improve the surface flatness. Meanwhile, the organic silicon modified acrylic emulsion and the polycarbonate polyurethane emulsion are compounded, and epoxy organic silicon is added to be used as internal crosslinking, so that the crosslinking degree of a paint film and the compactness of the paint film are effectively improved, and the water resistance and the moisture-proof effect of the wooden door are improved. Subsequently, the addition of the film-forming auxiliary can effectively reduce the MFFT of the film-forming material, so that the film-forming efficiency is higher and the paint film is denser.
Secondly, the added rheological inorganic bentonite has certain thixotropic property, and a special vertical cabin type structure of the rheological inorganic bentonite can be used as a filler and a framework in a compound system of the organic silicon modified acrylic emulsion and the polycarbonate polyurethane emulsion, so that excellent rheological, anti-settling and thickening effects are achieved, and the problems that the wood door is easy to sag when being overturned during spraying, and particularly, oil flows and is accumulated at a door frame are effectively solved. And then, the associative polyurethane thickener is matched with rheological inorganic bentonite for use, so that certain thixotropy and fluidity of the system can be provided, and the purposes of certain sagging prevention and quick leveling are achieved.
In addition, the added epoxy organosilane can be used for carrying out internal crosslinking with system emulsion (compound solution of organic silicon modified acrylic emulsion and polycarbonate polyurethane emulsion), and the crosslinking degree and compactness of a paint film are effectively improved, so that the water resistance and the adhesive force are improved, and the moisture-proof effect of the wooden door is improved.
The present invention in a preferred example may be further configured to: the composite material comprises the following components in percentage by weight:
by optimally controlling the dosage of each component, the thixotropy and the fluidity are optimized, and the purposes of preventing sagging and rapidly leveling are achieved. Production cost is reduced while production efficiency is further improved, the environmental protection problem is solved, the national standard safety and environmental protection standard can be met, and the economic benefit of enterprises is improved.
The present invention in a preferred example may be further configured to: the film-forming aid consists of 2-5 wt% of DPNB film-forming aid and 2-5 wt% of DPM film-forming aid.
By adopting the technical scheme, the DPNB film-forming additive and the DPM film-forming additive can reduce the MFFT of a film-forming object, so that the film-forming efficiency is higher, and a paint film is more compact. In addition, the combination of the DPNB film-forming aid and the DPM film-forming aid is selected, so that the film-forming property of a system can be ensured, the excellent comprehensive resistance is brought, a certain open time and volatilization gradient can be formed, the overflow of bubbles is facilitated, and the surface leveling property is not influenced.
The present invention in a preferred example may be further configured to: the defoaming agent consists of 0.5 to 1.5 weight percent of molecular-grade polymerized mineral oil defoaming agent, 0.3 to 0.6 weight percent of high-efficiency organic silicon defoaming agent and 1 to 3 weight percent of anti-foam-breaking organic silicon polymer defoaming agent.
By adopting the technical scheme, the high-efficiency organic silicon defoamer can quickly suppress and defoam bubbles, eliminate micro bubbles in a system, quickly transfer fine bubbles in the system to the surface for elimination, quickly transfer the molecular-level polymeric mineral oil defoamer to the surface of a paint film, and puncture large bubbles on the surface of the paint film, and the molecular-level polymeric mineral oil defoamer and the high-efficiency organic silicon defoamer (namely, the water-emulsified organic silicon defoamer) are matched for use, so that the defoaming and foam suppressing effects can be achieved, and the high-efficiency organic silicon defoamer has the effects of quickly breaking bubbles, improving the workability and improving the appearance of the paint film. In addition, the anti-foam-breaking organic silicon polymer defoaming agent mainly has a defoaming effect in the production process and solves mechanical foam of mechanical spraying. The three components are compounded for use, so that better defoaming and foam inhibiting effects can be achieved.
The present invention in a preferred example may be further configured to: the UV resistant absorbent also comprises 1-2 percent of UV resistant absorbent according to the weight percentage.
By adopting the technical scheme, the added UV-resistant absorbent can effectively improve the yellowing resistance.
The invention also provides a preparation method of the mechanical spraying water-based wood door moisture-proof matte white finish paint, which is simple in process and simplified in flow, and can solve the problems of bubbles, sagging, uneven liquid interface line, adhesion and the like generated in the mechanical spraying process.
The invention is realized by the following technical scheme, and the preparation method of the mechanical spraying water-based wood door damp-proof matte white finish paint comprises the following operation steps:
step one, adding the organic silicon modified acrylic emulsion and the polycarbonate polyurethane emulsion into a dispersion cylinder by taking a special clean container, starting a dispersion machine, and stirring for 5-10 minutes at the speed of 500-700 r/min;
step two, sequentially adding a pH regulator AMP-96 and one third to one half of defoaming agent, adjusting the rotating speed to 1000-1400r/min, dispersing at high speed for 30min, and carrying out QC detection to ensure that the 120 micron paper pulling plate has no shrinkage cavity and particles;
step three, taking a clean container, premixing the film-forming auxiliary agent, one-half to two-thirds of defoaming agent, wetting and leveling agent and deionized water, adding the premixed film-forming auxiliary agent, one-half to two-thirds of defoaming agent, wetting and leveling agent and deionized water into a large cylinder at the flow rate of 2-3Kg/min, adjusting the rotating speed to 1000-1400r/min, adjusting the dispersion viscosity by using the associative polyurethane thickener, adding the organic extinction powder, dispersing at a high speed for 20-30min, wherein the QC detection fineness is less than 30, and the pulling plate has no shrinkage cavity;
and step four, sequentially adding the aqueous titanium white slurry, the rheological inorganic bentonite slurry and the wax emulsion into a vat, adjusting the rotating speed to 600-900r/min, and stirring for 20-30min until no shrinkage cavity exists in the scraper.
By adopting the technical scheme, firstly, the organic silicon modified acrylic emulsion and the polycarbonate polyurethane emulsion are taken as film forming materials according to the proportion and are mixed; then, since AMP-96 is an organic amine containing a hydroxyl group and an amino group, it is possible to stabilize the pH of the system, and it is also possible to improve the dispersion efficiency of the pigment, which is advantageous for improving the gloss and increasing the performance of the thickener. One third to one half of defoaming agent is added into a system for introducing film forming materials of the organic silicon modified acrylic emulsion and the polycarbonate polyurethane emulsion, so that the foaming phenomenon caused in the mixing process of the organic silicon modified acrylic emulsion and the polycarbonate polyurethane emulsion can be reduced.
And then, the addition of the film-forming auxiliary agent reduces the minimum film-forming temperature (MFFT) of a film-forming material, so that the film-forming efficiency is higher and a paint film is denser. Meanwhile, the residual defoaming agent is added to be mixed with the wetting and leveling agent and the film-forming assistant, so that the bubble phenomenon generated in the mixing process after the film-forming assistant and the wetting and leveling agent are added into the system is reduced, and the occurrence probability of mechanical bubbles is further reduced. Then, the associative polyurethane thickener is used to increase the consistency of the system. The added organic extinction powder has good dispersion performance, and the integral glossiness of the finish can be effectively adjusted. And finally, adding aqueous titanium white slurry, rheological inorganic bentonite slurry and wax emulsion, wherein the associative polyurethane thickener is matched with the rheological inorganic bentonite, so that the thixotropic property and the flow property are effectively improved, and the aims of preventing sagging and quickly leveling are fulfilled.
The present invention in a preferred example may be further configured to: in the fourth step, after finishing adding the inorganic bentonite slurry with the convection modification, sequentially adding a UV ultraviolet resistant absorbent.
By adopting the technical scheme, in the fourth step, the added UV (ultraviolet) resistant absorbent can effectively improve the yellowing resistance as a medium light stabilizer.
The present invention in a preferred example may be further configured to: one third to one half of the defoaming agent added in the step two is selected from a mixture of a molecular-grade polymerized mineral oil defoaming agent and a high-efficiency organic silicon defoaming agent; in step three, one-half to two-thirds of the added defoaming agent is selected from anti-foam-breaking organic silicon polymer defoaming agents.
By adopting the technical scheme, the defoaming agent is carried out twice under the condition, so that the effects of basic defoaming and foam inhibition can be achieved, and the effects of quickly breaking foam, improving the workability and improving the appearance of a paint film are achieved. And the defoaming agent added for the second time is added together with the film-forming assistant, so that the defoaming effect of the defoaming agent is better.
The present invention in a preferred example may be further configured to: the rheological inorganic bentonite added in the fourth step is mainly composed of 8wt% of bentonite and 92 wt% of deionized water.
By adopting the technical scheme, the main mineral component of the inorganic bentonite is montmorillonite, the content is 85-90%, and some properties of the bentonite are determined by the montmorillonite. The rheological inorganic bentonite contains a large amount of water, so that under the action of water, the rheological inorganic bentonite has a volume expansion of several times to 20-30 times by utilizing a vertical cabin type structure, can be suspended in water by stirring, and can be pasty after standing for a period of time. The addition of the rheological inorganic bentonite ensures that the finish paint has certain thixotropy, and the thixotropy plays an important role in increasing the sagging resistance of the paint, improving the appearance of the coating and expanding the application field. The used inorganic bentonite takes montmorillonite as a main component, and achieves excellent rheological, anti-settling and thickening effects by utilizing a vertical cabin type structure. Effectively solves the problem that the wooden door is easy to hang when being overturned during spraying, and particularly the door frame is easy to flow and accumulate.
In conclusion, the invention has the following beneficial effects:
1. the resin used in the invention is compounded by organic silicon modified acrylic emulsion and polycarbonate polyurethane emulsion, and epoxy organic silicon is added as internal crosslinking, so that the crosslinking degree of a paint film and the compactness of the paint film are effectively improved, and the water resistance and the moisture-proof effect of a wooden door are improved.
2. The optimized rheological inorganic bentonite has certain thixotropy, and the used inorganic bentonite takes montmorillonite as a main component and utilizes a vertical cabin type structure to achieve excellent rheological, anti-settling and thickening effects. Effectively solves the problem that the wooden door is easy to hang when being overturned during spraying, and particularly the door frame is easy to flow and accumulate.
3. The invention solves the problems of air bubbles, sagging, uneven liquid interface line, adhesive force and the like generated in the mechanical spraying process. Production cost is reduced while production efficiency is improved, the environmental protection problem is solved, the national standard safety and environmental protection standard can be met, and the economic benefit of enterprises is improved.
Detailed Description
The present invention will be described in further detail with reference to examples.
First, an embodiment
Example 1: the mechanical spraying water-based wood door damp-proof matte white finish comprises the following components in percentage by weight:
wherein the organosilicon modified acrylic emulsion is selected from organosilicon modified acrylic emulsion EA2031S (the manufacturer is Jiangsu Sanmu group Co., Ltd.; CB No. is CB 63021257);
the polycarbonate polyurethane emulsion is selected from aqueous polycarbonate polyurethane dispersions (produced in Mitsui Chemicals, Japan, CAS number 2018-06-13, Cat number Takelac W6110);
the pH regulator AMP-96 is selected from water-based multifunctional adjuvant AMP-96pH regulator, and its chemical component is 2-aminomethyl-1-propanol (product model: AMP96, brand: Casoli CASTLE);
the molecular polymer mineral oil defoamer is a Pasteur defoamer FoamStar A10 molecular defoamer, the defoamer FoamStar A10 is a novel mineral oil-based compound synthesized by a defoamer substance FoamStar with a special molecular structure and special mineral oil, the addition amount of the defoamer is 1/3-1/2 lower than that of a traditional defoamer, and the defoamer cost is reduced by at least 20%. (specification: 170kg, model A10, brand: Yachuang);
the high-efficiency organic silicon defoamer is a THIX-278 organic silicon defoamer (model THIX-278, manufactured by Henxin chemical industry);
the film-forming assistant DPNB is an aqueous film-forming assistant DPNB (manufacturer: Qingdao Haiyien chemical technology Co., Ltd., CAS: 29911-28-3);
the film-forming assistant DPM is DPM dipropylene glycol methyl ether aqueous film-forming assistant (brand: DPM, CAS number: 29911-28-2, manufacturer Guangzhou sourced siliconization chemical Co., Ltd.);
the anti-foam-breaking organic silicon polymer defoamer is a fluorine modified organic silicon foam-breaking polymer defoamer (the model is 540570560530, the brand is winning credibility, and the manufacturer Qingdao Hongde chemical company, Inc.);
the wetting leveling agent is a modified organic silicon high-performance leveling agent (the brand is Silcona, Germany, the model is SILCO FLW K-134, and the manufacturer is Uniclear);
the associative polyurethane thickener is associative polyurethane thickener YQ-018 (type: YQ-018, product number: 018, manufacturer: Naja chemical Co., Ltd., Guangzhou city);
the rheological inorganic bentonite is mainly composed of 8wt% of bentonite and 92 wt% of deionized water. The main mineral component of the inorganic bentonite is montmorillonite, and the content is 85-90%.
The organic matting powder adopts Albemarle American jagbao Pergopak M6 organic matting powder (produced in Germany, CAS number 9011-05-6, model Pergopak M6; refractive index D20 ═ 1.607);
the water-based titanium white slurry IS high-concentration water-based titanium white slurry IS1 (the product number IS IS1, the production place IS Shandong Jinan, the brand IS awarded color, and the manufacturer IS awarded color coating toning technology Limited company in Jinan);
the UV anti-ultraviolet absorbent is an anti-ultraviolet absorbent UV-328, and the product is a benzotriazole ultraviolet absorbent (the manufacturer, Changzhou New policy high polymer material Co., Ltd., the melting point is 80-83 ℃, the light transmittance is 460nm or more and 97%, and 500nm or more and 98%);
the epoxy organosilane is 3-glycerol propyl trimethoxy silane, and the CAS number is 2530-83-8.
The wax emulsion is a Mackemen wax emulsion ME91240G (Haolil industries, Ltd., Shanghai, Ltd.), where ME91240 is a nonionic high density polyethylene wax emulsion free of nonylphenol type surfactant.
The preparation method comprises the following operation steps:
step one, taking a special clean container, sequentially adding the organic silicon modified acrylic emulsion and the polycarbonate polyurethane emulsion into a dispersion cylinder according to the mixture ratio, starting a dispersion machine, and stirring for 5 minutes at 500 r/min.
And step two, sequentially adding a pH regulator AMP-96, a molecular-level polymerized mineral oil defoaming agent and a high-efficiency organic silicon defoaming agent, adjusting the rotating speed to 1000r/min, dispersing at a high speed for 30min, and carrying out QC (quality control) detection to detect that the 120-micron paper pulling plate has no shrinkage cavity and particles.
And step three, taking a clean container, premixing the film-forming auxiliary agent, the anti-foam-breaking organic silicon polymer defoaming agent, the wetting and leveling agent and the deionized water, adding the premixed film-forming auxiliary agent, the anti-foam-breaking organic silicon polymer defoaming agent, the wetting and leveling agent and the deionized water into a large cylinder at the flow rate of 2Kg/min, adjusting the rotating speed to 1000r/min, adjusting the dispersion viscosity by using the associative polyurethane thickener, adding the organic matting powder, dispersing for 20min at a high speed, wherein the QC detection fineness is less than 30, and the.
And step four, sequentially adding the aqueous titanium white slurry, the rheological inorganic bentonite slurry, the UV anti-ultraviolet absorbent and the wax emulsion into a vat, adjusting the rotating speed to 600r/min, and stirring for 20min until no shrinkage cavity exists in the scraper.
Examples 2 to 10: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 1 in that: the components and amounts thereof were varied as indicated in the following scheme 1.
TABLE 1
Example 10: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the formulation lacks UV anti-UV absorber and is supplemented to 100% with deionized water. The addition operation of the UV-resistant absorbent in the fourth step is also lacked in the preparation method.
The specific preparation method comprises the following operation steps:
step one, taking a special clean container, sequentially adding the organic silicon modified acrylic emulsion and the polycarbonate polyurethane emulsion into a dispersion cylinder according to the mixture ratio, starting a dispersion machine, and stirring for 5 minutes at 500 r/min.
And step two, sequentially adding a pH regulator AMP-96, a molecular-level polymerized mineral oil defoaming agent and a high-efficiency organic silicon defoaming agent, adjusting the rotating speed to 1000r/min, dispersing at a high speed for 30min, and carrying out QC (quality control) detection to detect that the 120-micron paper pulling plate has no shrinkage cavity and particles.
And step three, taking a clean container, premixing the film-forming auxiliary agent, the anti-foam-breaking organic silicon polymer defoaming agent, the wetting and leveling agent and the deionized water, adding the premixed film-forming auxiliary agent, the anti-foam-breaking organic silicon polymer defoaming agent, the wetting and leveling agent and the deionized water into a large cylinder at the flow rate of 2Kg/min, adjusting the rotating speed to 1000r/min, adjusting the dispersion viscosity by using the associative polyurethane thickener, adding the organic matting powder, dispersing for 20min at a high speed, wherein the QC detection fineness is less than 30, and the.
And step four, sequentially adding the aqueous titanium white slurry, the rheological inorganic bentonite slurry and the wax emulsion into a vat, adjusting the rotating speed to 600r/min, and stirring for 20min until no shrinkage cavity exists in the scraper.
Example 11: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the preparation method comprises the following operation steps:
step one, taking a special clean container, sequentially adding the organic silicon modified acrylic emulsion and the polycarbonate polyurethane emulsion into a dispersion cylinder according to the proportion, starting a dispersion machine, and stirring for 8 minutes at 600 r/min.
And step two, sequentially adding a pH regulator AMP-96, a molecular-level polymerized mineral oil defoaming agent and a high-efficiency organic silicon defoaming agent, adjusting the rotating speed to 1200r/min, dispersing at a high speed for 30min, and carrying out QC (quality control) detection to detect that the 120-micron paper pulling plate has no shrinkage cavity and particles.
And step three, taking a clean container, premixing the film-forming auxiliary agent, the anti-foam-breaking organic silicon polymer defoaming agent, the wetting and leveling agent and the deionized water, adding the premixed film-forming auxiliary agent, the anti-foam-breaking organic silicon polymer defoaming agent, the wetting and leveling agent and the deionized water into a large cylinder at the flow rate of 2.5Kg/min, adjusting the rotating speed to 1200r/min, adjusting the dispersion viscosity by using the associative polyurethane thickener, adding the organic matting powder, dispersing for 25min at a high speed, and detecting the QC (quality control) to have the fineness.
And step four, sequentially adding the aqueous titanium white slurry, the rheological inorganic bentonite slurry, the UV anti-ultraviolet absorbent and the wax emulsion into a vat, adjusting the rotating speed to 800r/min, and stirring for 22min until no shrinkage cavity exists in the scraper.
Example 12: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the preparation method comprises the following operation steps:
step one, taking a special clean container, sequentially adding the organic silicon modified acrylic emulsion and the polycarbonate polyurethane emulsion into a dispersion cylinder according to the mixture ratio, starting a dispersion machine, and stirring for 10 minutes at 700 r/min.
And step two, sequentially adding a pH regulator AMP-96, a molecular-level polymerized mineral oil defoaming agent and a high-efficiency organic silicon defoaming agent, adjusting the rotating speed to 1400r/min, dispersing at a high speed for 30min, and carrying out QC (quality control) detection to detect that the 120-micron paper pulling plate has no shrinkage cavity and particles.
And step three, taking a clean container, premixing the film-forming auxiliary agent, the anti-foam-breaking organic silicon polymer defoaming agent, the wetting and leveling agent and the deionized water, adding the premixed film-forming auxiliary agent, the anti-foam-breaking organic silicon polymer defoaming agent, the wetting and leveling agent and the deionized water into a large cylinder at the flow rate of 3Kg/min, adjusting the rotating speed to 1400r/min, adjusting the dispersion viscosity by using the associative polyurethane thickener, adding the organic matting powder, dispersing the mixture at a high speed for 30min, and detecting the QC (quality control) fineness to.
And step four, sequentially adding the aqueous titanium white slurry, the rheological inorganic bentonite slurry, the UV anti-ultraviolet absorbent and the wax emulsion into a vat, adjusting the rotating speed to 900r/min, and stirring for 30min until no shrinkage cavity exists in the scraper.
Second, comparative example
Comparative example 1: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the formula does not contain epoxy organosilane, and deionized water is adopted to supplement the epoxy organosilane to 100 percent.
Comparative example 2: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the formula does not contain rheological inorganic bentonite slurry, and deionized water is adopted to supplement the formula to 100 percent.
Comparative example 3: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the film-forming aid in the formula is 6% of film-forming aid DPNB in percentage by weight.
Comparative example 4: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the film-forming aid in the formula is 6% of film-forming aid DPM in percentage by weight.
Comparative example 5: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the formula does not contain a film-forming aid DPNB and a film-forming aid DPM, and deionized water is adopted to supplement the formula to 100 percent.
Comparative example 6: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the film-forming assistant in the formula is 6 percent of film-forming assistant BCS in percentage by weight.
Comparative example 7: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the defoaming agent in the formula is 4% molecular polymer mineral oil defoaming agent by weight percentage.
Comparative example 8: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the defoaming agent in the formula is 4 percent of high-efficiency organic silicon defoaming agent in percentage by weight.
Comparative example 9: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the defoaming agents in the formula are all 4% of anti-foam-breaking organic silicon polymer defoaming agents in percentage by weight.
Comparative example 10: a moisture-proof matte white finish for a mechanical spraying water-based wooden door is different from that of the embodiment 8 in that: the defoaming agents in the formula are all 4 percent of alkyne diol defoaming agents in percentage by weight.
Thirdly, performance detection and analysis test I: basic Performance test of examples 1 to 9
Test subjects: examples 1 to 9 were used as test samples 1 to 9.
TABLE 2 basic Performance test data
And (3) test results: from the above table 2, it can be seen that as the addition amounts of the mineral oil and the silicone defoamer increase, the defoaming performance is better, but the leveling property is worse; when the addition amount of the molecular-level polymerized mineral oil defoaming agent is up to 1.5%, the leveling property is obviously reduced, and the addition amount of the molecular-level polymerized mineral oil defoaming agent cannot be increased any more; when the addition amount of the defoaming agent of the anti-foam-breaking organic silicon polymer is increased from 2% to 3%, the defoaming performance of the system is slightly improved; the influence on other performances of the system is small due to different addition amounts of the two antifoaming agents; both test sample 8 and test sample 9 satisfied the specific requirements, but the balance of defoaming leveling property and cost were considered in combination, and example 8 was determined as the preferred embodiment.
And (2) test II: effect of epoxy organosilanes on topcoat
Test subjects: example 8 was used as test sample 8 and comparative example 1 was used as control 1.
TABLE 3
| Detecting items | Standard requirements | Test specimen 8 | Control 1 |
| Coating weight g/m2 | 150 | 150 | 150 |
| Adhesion force | Grade no more than 1 | 0 | 1.1 |
| Water resistance for 3 days | No abnormality | No abnormality | No obvious abnormality |
And (3) test results: as can be seen from table 3, the adhesion value of the test sample 8 is larger than that of the comparative sample 1 in comparison with that of the comparative sample 1, and the two do not change much under the water resistance test for 3 days. It is thus clear that the addition of an epoxyorganosilane to the formulation does have a certain effect on the adhesion of the topcoat.
And (3) test III: effect of rheological inorganic Bentonite slurries on topcoat
Test subjects: example 8 was used as test sample 8, and comparative example 2 was used as control sample 2.
TABLE 4
And (3) test results: as shown in table 4, when the dry film leveling property of the control sample 2 is less than the standard requirement of 4.0, the anti-sagging (constant temperature and humidity) data of the control sample 2 is also less than that of the test sample 8 in comparison with the control sample 2 in the test sample 8. From this, it is found that the addition of the rheological inorganic bentonite slurry to the formulation can surely improve the leveling property and sag resistance (constant temperature and humidity) of the dry film.
And (4) testing: effect of film-Forming auxiliary on topcoat
Test subjects: example 8 was used as test sample 8, and comparative examples 3 to 5 were used as control samples 3 to 5.
TABLE 5
And (3) test results: as shown in Table 5, the dry film leveling, adhesion and sag data of control 5 are higher than the standard requirements when comparing test 8, control 3, control 4, control 5 and control 6, and the moldability of control 6 is worse than that of controls 3-4 when comparing control 6 with controls 3-4. Compared with the test sample 8, the dry film leveling value of the control samples 3-4 is smaller than that of the test sample 8, the adhesive force value of the control samples 3-4 is larger than that of the test sample 8, and meanwhile, the sagging values of the control samples 3-4 are smaller than those of the test sample 8. Therefore, when the film-forming assistant is selected from the combination of the film-forming assistant DPNB and the film-forming assistant DPM, the finish paint has good dry film leveling property, adhesive force and releasing and hanging performance.
And (5) testing: effect of defoamers on topcoat
Test subjects: example 8 was used as test sample 8, and comparative examples 7 to 10 were used as control samples 7 to 10.
TABLE 6
And (3) test results: as can be seen from Table 6, the dry film defoaming and dry film leveling data for control 7-9 are less than for test 9 when compared to test 8 for control 7-9. Therefore, the dry film defoaming property and the dry film leveling property of a single defoaming agent are both inferior to the effect of a molecular-level polymerized mineral oil defoaming agent, a high-efficiency organic silicon defoaming agent and an anti-foam-breaking organic silicon polymer defoaming agent after being compounded. Secondly, the dry film defoaming property and the dry film leveling property data of the alkyne diol defoaming agent are both smaller than those of the control samples 7-9. From these results, it was found that the defoaming effect of the acetylene glycol defoaming agent was slightly inferior to that of a single defoaming agent such as a molecular-scale polymer mineral oil defoaming agent.
The specific embodiments are only for explaining the present invention, and the present invention is not limited thereto, and those skilled in the art can make modifications without inventive contribution to the present embodiments as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. The mechanical spraying water-based wood door damp-proof matte white finish is characterized by comprising the following components in percentage by weight:
38-42% of organic silicon modified acrylic emulsion;
5-15% of polycarbonate polyurethane emulsion;
AMP-960.1-0.3% as pH regulator;
1.8 to 5.1 percent of defoaming agent;
4-10% of film-forming additive;
0.2 to 0.4 percent of wetting and leveling agent;
1-3% of deionized water;
0.1 to 0.3 percent of associative polyurethane thickener;
1-3% of organic matting powder;
25-30% of aqueous titanium white slurry;
1-3% of rheological inorganic bentonite slurry;
1-2% of epoxy organosilane;
2-5% of wax emulsion.
2. The mechanical spraying water-based wood door moisture-proof matte white finish paint as claimed in claim 1, which is characterized by comprising the following components in percentage by weight:
40% of organic silicon modified acrylic emulsion;
10% of polycarbonate polyurethane emulsion;
AMP-960.2% as a pH regulator;
4% of defoaming agent;
6% of film forming auxiliary agent;
0.2 percent of wetting and leveling agent;
2% of deionized water;
0.3 percent of associative polyurethane thickener;
2% of organic matting powder;
27% of aqueous titanium white slurry;
2.8 percent of rheological inorganic bentonite slurry;
1% of epoxy organosilane;
3% of wax emulsion.
3. The moisture-proof matte white finish paint for mechanical spraying water-based wood doors as claimed in claim 1, wherein the film-forming aid consists of 2-5% of DPNB film-forming aid and 2-5% of DPM film-forming aid in percentage by weight.
4. The moistureproof matte white finish for mechanical spraying water-based wood doors according to claim 1, wherein the defoamer consists of 0.5-1.5 wt% of molecular-grade polymerized mineral oil defoamer, 0.3-0.6 wt% of high-efficiency organic silicon defoamer and 1-3 wt% of anti-foam-breaking organic silicon polymer defoamer.
5. The moisture-proof matte white finish paint for the mechanical spraying water-based wood door according to claim 1, which is characterized by further comprising 1-2% of UV (ultraviolet) resistant absorbent in percentage by weight.
6. The preparation method of the mechanical spraying water-based wood door moisture-proof matte white finish paint according to any one of claims 1 to 5, characterized by comprising the following operation steps:
step one, adding the organic silicon modified acrylic emulsion and the polycarbonate polyurethane emulsion into a dispersion cylinder by taking a special clean container, starting a dispersion machine, and stirring for 5-10 minutes at the speed of 500-700 r/min;
step two, sequentially adding a pH regulator AMP-96 and one third to one half of defoaming agent, adjusting the rotating speed to 1000-1400r/min, dispersing at high speed for 30min, and carrying out QC detection to ensure that the 120 micron paper pulling plate has no shrinkage cavity and particles;
step three, taking a clean container, premixing the film-forming auxiliary agent, one-half to two-thirds of defoaming agent, wetting and leveling agent and deionized water, adding the premixed film-forming auxiliary agent, one-half to two-thirds of defoaming agent, wetting and leveling agent and deionized water into a large cylinder at the flow rate of 2-3Kg/min, adjusting the rotating speed to 1000-1400r/min, adjusting the dispersion viscosity by using the associative polyurethane thickener, adding the organic extinction powder, dispersing at a high speed for 20-30min, wherein the QC detection fineness is less than 30, and the pulling plate has no shrinkage cavity;
and step four, sequentially adding the aqueous titanium white slurry, the rheological inorganic bentonite slurry, the epoxy organosilane and the wax emulsion into a vat, adjusting the rotating speed to 600-900r/min, and stirring for 20-30min until no shrinkage cavity exists in the scraper.
7. The preparation method of the damp-proof matte white finish for the mechanical spraying water-based wood door according to claim 6, wherein in the fourth step, after the addition of the inorganic bentonite slurry in the rheological form is completed, a UV anti-ultraviolet absorbent is sequentially added.
8. The preparation method of the damp-proof matte white finish for the mechanical spraying water-based wood door according to claim 7, wherein one third to one half of the defoaming agent added in the second step is selected from a mixture of a molecular-grade polymeric mineral oil defoaming agent and a high-efficiency organic silicon defoaming agent; in step three, one-half to two-thirds of the added defoaming agent is selected from anti-foam-breaking organic silicon polymer defoaming agents.
9. The preparation method of the damp-proof matte white finish for the mechanical spraying water-based wood door according to claim 6, wherein the rheological inorganic bentonite added in the fourth step is mainly composed of 8wt% of bentonite and 92 wt% of deionized water.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112143314A (en) * | 2020-09-28 | 2020-12-29 | 福州展辰新材料有限公司 | Water-based high-fullness wood coating suitable for electrostatic spraying |
| CN112280398A (en) * | 2020-07-25 | 2021-01-29 | 上海立邦长润发涂料有限公司 | Water-based single-component colored paint capable of being dip-coated, preparation method thereof and dip-coating method |
| CN115181458A (en) * | 2022-08-25 | 2022-10-14 | 石家庄市油漆厂 | Water-based anticorrosive paint for automobile plate spring and preparation method thereof |
| CN115572512A (en) * | 2022-12-07 | 2023-01-06 | 山东一诺威聚氨酯股份有限公司 | Water-based finish paint for high-wear-resistance plastic court and preparation method thereof |
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| JPS5436394A (en) * | 1977-08-27 | 1979-03-17 | Ota Toshuki | Preparation of urethane resin emulsion |
| CN102676037A (en) * | 2012-05-25 | 2012-09-19 | 广东花王涂料有限公司 | Single-component waterborne woodware matte white paint |
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| JPS5436394A (en) * | 1977-08-27 | 1979-03-17 | Ota Toshuki | Preparation of urethane resin emulsion |
| CN102676037A (en) * | 2012-05-25 | 2012-09-19 | 广东花王涂料有限公司 | Single-component waterborne woodware matte white paint |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112280398A (en) * | 2020-07-25 | 2021-01-29 | 上海立邦长润发涂料有限公司 | Water-based single-component colored paint capable of being dip-coated, preparation method thereof and dip-coating method |
| CN112143314A (en) * | 2020-09-28 | 2020-12-29 | 福州展辰新材料有限公司 | Water-based high-fullness wood coating suitable for electrostatic spraying |
| CN112143314B (en) * | 2020-09-28 | 2022-06-07 | 福州展辰新材料有限公司 | Water-based high-fullness wood coating suitable for electrostatic spraying |
| CN115181458A (en) * | 2022-08-25 | 2022-10-14 | 石家庄市油漆厂 | Water-based anticorrosive paint for automobile plate spring and preparation method thereof |
| CN115572512A (en) * | 2022-12-07 | 2023-01-06 | 山东一诺威聚氨酯股份有限公司 | Water-based finish paint for high-wear-resistance plastic court and preparation method thereof |
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