CN117264481B - Universal yellowing-resistant single-component finish paint applicable to various priming paint and preparation method thereof - Google Patents
Universal yellowing-resistant single-component finish paint applicable to various priming paint and preparation method thereof Download PDFInfo
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- CN117264481B CN117264481B CN202311250936.5A CN202311250936A CN117264481B CN 117264481 B CN117264481 B CN 117264481B CN 202311250936 A CN202311250936 A CN 202311250936A CN 117264481 B CN117264481 B CN 117264481B
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- 239000003973 paint Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 41
- 238000004383 yellowing Methods 0.000 title claims abstract description 21
- 230000037452 priming Effects 0.000 title claims abstract description 15
- 239000007822 coupling agent Substances 0.000 claims abstract description 41
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000839 emulsion Substances 0.000 claims abstract description 34
- 229920003009 polyurethane dispersion Polymers 0.000 claims abstract description 29
- 239000004814 polyurethane Substances 0.000 claims abstract description 28
- 229920002635 polyurethane Polymers 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- 239000002562 thickening agent Substances 0.000 claims description 37
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 35
- 239000000080 wetting agent Substances 0.000 claims description 26
- 239000008367 deionised water Substances 0.000 claims description 24
- 229910021641 deionized water Inorganic materials 0.000 claims description 24
- 239000002270 dispersing agent Substances 0.000 claims description 24
- 238000004519 manufacturing process Methods 0.000 claims description 24
- 239000000654 additive Substances 0.000 claims description 23
- 230000000996 additive effect Effects 0.000 claims description 23
- 239000002518 antifoaming agent Substances 0.000 claims description 21
- 239000000377 silicon dioxide Substances 0.000 claims description 17
- 235000012239 silicon dioxide Nutrition 0.000 claims description 16
- 239000002994 raw material Substances 0.000 claims description 14
- 239000011259 mixed solution Substances 0.000 claims description 12
- 238000007790 scraping Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 11
- 239000013530 defoamer Substances 0.000 claims description 8
- CUVLMZNMSPJDON-UHFFFAOYSA-N 1-(1-butoxypropan-2-yloxy)propan-2-ol Chemical compound CCCCOCC(C)OCC(C)O CUVLMZNMSPJDON-UHFFFAOYSA-N 0.000 claims description 6
- 238000012827 research and development Methods 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 4
- 239000012972 dimethylethanolamine Substances 0.000 claims description 4
- 229920002125 Sokalan® Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 239000002023 wood Substances 0.000 abstract description 13
- 238000010276 construction Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 239000000853 adhesive Substances 0.000 abstract description 5
- 230000001070 adhesive effect Effects 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000006957 Michael reaction Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 7
- 239000006185 dispersion Substances 0.000 description 7
- 238000003860 storage Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- CBTVGIZVANVGBH-UHFFFAOYSA-N aminomethyl propanol Chemical compound CC(C)(N)CO CBTVGIZVANVGBH-UHFFFAOYSA-N 0.000 description 3
- 239000003431 cross linking reagent Substances 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 238000007665 sagging Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229920004482 WACKER® Polymers 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a general yellowing-resistant single-component finish paint suitable for various priming paint, which comprises aqueous acrylic emulsion, aqueous polyurethane dispersion and coupling agent, wherein the weight ratio of the aqueous acrylic emulsion to the aqueous polyurethane dispersion to the coupling agent is 50-60:15-20:1-2; the coupling agent is Coatosil 2287 developed and produced by American Michaels, and the invention discloses an optimal proportioning range of the Coatosil 2287 coupling agent, aqueous acrylic emulsion and aqueous polyurethane dispersoid, wherein in the proportioning range, a film layer with high hardness and yellowing resistance is formed on the surface of a wood product by the invention after being solidified and formed, so that the protection effect of the invention on the wood product is ensured, and the service life of the wood product is prolonged; the invention also has excellent adhesive force and service life, can be firmly attached to various different priming paint, and the adhesive force and the performance of the formed film layer cannot be weakened along with the increase of the placement time, so that the application range of the invention is enlarged, the shelf life of the invention is prolonged, and the construction is convenient; the invention also discloses a preparation method of the universal yellowing-resistant single-component finish paint.
Description
Technical Field
The invention belongs to the technical field of paint, and particularly relates to a universal yellowing-resistant single-component finish paint suitable for various priming paint and a preparation method thereof.
Background
The woodware taking natural wood grain and texture as main design elements needs to be coated in an open mode, and generally, only priming paint and finishing paint are coated on the surface of the woodware, namely, putty is not coated to completely display the wood grain.
The primer mainly has the effects of sealing pore fiber ducts of the wood, locking grease of the wood and keeping the original system of the wood, simultaneously being used as a substrate of a film layer, reducing the dosage of finish paint and having certain decorative capability. The main function of the finishing paint is protection and decoration, so that the woodware can resist the impact of external force and the erosion of environment, and the preset glossiness is provided to beautify the appearance of the woodware.
Firstly, the finishing paint product is mainly divided into two types of double components and single component according to the construction mode, the double components of finishing paint are required to be added with cross-linking agent according to the proportion during spraying construction, the cross-linking agent is required to be used in a limited time after being added, the limited time is within 24 hours, the optimal use time is within 8 hours, otherwise, the risk of gelation or failure exists, and the complexity and the risk of construction are increased, so that the single component finishing paint with more convenient design and construction is selected.
Second, currently the more mainstream primer products are PU primer, PE primer and UV primer, respectively, and as top coats over the primer are preferably capable of firmly adhering to the different primers.
Finally, if yellowing occurs in the finish paint, the appearance aesthetic feeling of the woodware is seriously affected, so the designed finish paint preferably has good yellowing resistance.
In view of the above product design requirements, the inventor finds that the Coatosil 2287 coupling agent developed and produced by the U.S. mai-image can be firmly attached to a plurality of different primer paints by combining with the aqueous polyurethane modified acrylic finish paint, and has excellent yellowing resistance effect; meanwhile, the inventors have also found that if the Coatosil 2287 coupling agent is simply added directly to the existing coating system of the company, the technical effect is not maximally exerted, i.e., the application of the Coatosil 2287 coupling agent has certain requirements on the system design of the coating.
To sum up, in order to maximize the synergistic effect of the Coatosil 2287 coupling agent and the aqueous polyurethane modified acrylic top coat, the inventors considered that development and improvement of the coating system design, the component ratio, and the like around the Coatosil 2287 coupling agent are necessary to provide a single-component top coat which can be applied to various primers and has good yellowing resistance.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a universal yellowing-resistant single-component finish paint applicable to various priming paint and a preparation method thereof, so as to overcome the technical problems in the prior art.
The technical scheme of the invention is realized as follows:
a universal yellowing-resistant single-component finish paint suitable for various priming paint comprises aqueous acrylic emulsion, aqueous polyurethane dispersion and coupling agent, which are mixed according to the weight ratio of 50-60:15-20:1-2;
the coupling agent is Coatosil 2287 developed and produced by Michaelsen;
the inventors found that Coatosil 2287 had a certain requirement on the pH of the coating system, and that the pH was not less than 8 for stable presence, and therefore the pH of the system was controlled to 8.0 or more by the addition of a pH adjustor.
Firstly, aiming at the Coatosil 2287 coupling agent, the invention discloses an optimal proportioning range of the coupling agent, aqueous acrylic emulsion and aqueous polyurethane dispersoid, and in the range proportioning, the coupling agent forms a high-hardness film layer on the surface of the wood after being solidified and formed, thereby ensuring the protection effect of the coupling agent on the wood and prolonging the service life of the wood;
secondly, the invention has excellent adhesive force and effective use period, can be firmly attached to various different priming paint, and the adhesive force and the performance of the formed film layer cannot be weakened along with the increase of the placement time, so that the application range of the invention is enlarged and the shelf life of the invention is prolonged;
again, the invention has excellent weather resistance and yellowing resistance, and ensures that the texture and texture of woodware can be effectively displayed for a long time;
finally, the invention is a single-component water-based environment-friendly paint, does not need to additionally add a cross-linking agent during construction, has no limitation of coating aging, and greatly increases construction convenience.
Preferably, the universal yellowing-resistant single-component finishing paint suitable for various priming paint comprises the following preparation raw materials in parts by weight:
50-60 parts of aqueous acrylic emulsion, 15-20 parts of aqueous polyurethane dispersoid, 2-4 parts of film forming additive, 1-2 parts of coupling agent, 1-2 parts of thickener, 0.2-0.5 part of aqueous dispersing agent and 4-8 parts of deionized water.
The aqueous acrylic emulsion and the aqueous polyurethane dispersion have extremely low viscosity, so that the problems of easy sagging, thinner paint film and the like occur in construction, and therefore, 1-2 parts of thickener is arranged to solve the problems.
Meanwhile, 2-4 parts of film forming auxiliary agent are arranged to reduce the temperature and time required by curing film formation, so that the film forming agent is completely dried at normal temperature (more than or equal to 25 ℃ plus or minus 5 ℃) for 24 hours, and is cured into a film.
The aqueous acrylic emulsion is Setaqua 6718 which is newly developed and produced in the United states, preferably, the aqueous acrylic emulsion has high transparency, is especially suitable for the product design of the invention, and simultaneously, the product has the advantages of higher hardness and higher curing speed, can have excellent protection effect on the woodware and is convenient for construction.
Preferably, the aqueous polyurethane dispersion is newly developed and produced in the united statesThe PU F125 is self-curing, is suitable for the design of the single-component product of the invention, has good wear resistance and hardness, and is particularly suitable for being applied to water-based wood paint so as to realize the protection effect of the invention on woodware.
Preferably, the thickener is ACRYSOL RM-12W developed and produced by Dow in America, and from the above, the thickener is used for solving the sagging problem, the product has excellent sagging resistance when used in a small amount, the fullness of a film layer can be ensured by adopting any smearing mode, and the odor is smaller, so that the thickener accords with the environmental protection pursuit of the invention.
Preferably, the thickener is a polyurethane thickener, and the polyurethane thickener has good leveling property, good water resistance and scratch resistance, is especially suitable for the requirements of the wood finish paint product of the invention, has no dependence on the pH value of a paint system, and is suitable for the invention with a specific pH range.
The invention pursues a film effect with low gloss and high transparency, and does not pursue too high gloss, so the invention sets 1-2 parts of silicon dioxide to control the gloss in a lower range, has softer visual effect, can better present the texture and the color of the high-end light-colored woodware, but is not suitable for excessive addition to avoid influencing the transparency effect.
The film forming auxiliary agent is DPNB developed and produced by Dow in the United states, the CAS number is 29911-28-2, and the product can be well dissolved in the coating system of the invention, has low toxicity and smell, and accords with the environmental protection pursuit of the invention.
Preferably, the pH value of the pH regulator is more than 10 and is more than or equal to 8.0, and if the pH value is more than 10, the fluidity of the product is poor, and the flatness of the paint film after construction can be affected. .
The PH regulator is developed and produced by Wacker in GermanyDMEA, which does not affect the performance (mainly water resistance) of the coating system of the present invention compared to the usual PH regulator ammonia and AMP-95, should be selected as less odor as possible because DMEA volatilizes after application, and the product of the present invention has a lower odor compared to the usual PH regulator AMP-95 and ammonia, which is a pursuit of environmental protection in the coating field.
Preferably, the foam stabilizer also comprises 0.1 to 0.5 part of organic silicon defoamer, eliminates the influence of foam on the preparation processing and the product performance of the invention, and improves the product quality of the invention.
Although the defoaming agent can practically eliminate the adverse effect of foam, the defoaming principle of the defoaming agent also often brings about the problem of shrinkage cavity, so that the organic silicon defoaming agent is tego FOAMEX 810 produced by Germany Di high research and development, the product has excellent compatibility with other components of the invention on the premise of ensuring the defoaming energy efficiency, the problem of shrinkage cavity brought by the defoaming agent can be reduced as much as possible, and the product has good long-term performance, and is attached to the pursuit of the long-term stability of the invention.
Preferably, the paint also comprises 0.3 to 0.5 part of organic silicon wetting agent, so that the paint can quickly wet and spread a plurality of different priming paint during the construction painting.
The organosilicon wetting agent is TEGO Twain 4100 which is developed and produced by Germany Di high, and the product is added, so that the invention not only can effectively wet various priming paint, but also has excellent anti-shrinkage effect, and can effectively solve the problems of shrinkage cavity, shrinkage edge, orange peel and the like by being matched with the TEGO FOAMEX 810 defoamer, thereby improving the quality of the formed film.
The invention also discloses a preparation method of the universal yellowing-resistant single-component finish paint applicable to various priming paint, which comprises the following steps:
(1) Sequentially adding the water-based acrylic emulsion, the water-based polyurethane dispersion and the coupling agent in a preset weight part into a production container, and stirring uniformly at a rotating speed of 700-900 rpm;
(2) Maintaining the rotating speed, adding a defoaming agent and a wetting agent in a preset weight part, increasing the rotating speed to 1000-1200rpm, dispersing for 8-10 minutes, and preparing a film on a clean glass plate by using an applicator to determine that a wet film has no shrinkage cavity;
(3) The rotating speed is reduced to 500-700rpm, the water-based dispersing agent and the silicon dioxide with preset weight parts are added in sequence, the rotating speed is increased to 800-1000rpm, the dispersing is carried out for 10-15 minutes, and the scraping plate confirms that no shrinkage cavity exists;
(4) Maintaining the rotating speed, and adding the mixed solution of the film forming auxiliary agent and deionized water in a preset weight part into a production cylinder in a linear and slow way;
(5) The rotating speed is reduced to 500-700rpm, the thickener with preset weight portions is added, dispersed for 10-20 minutes, filtered by a filter bag with 200-400 meshes, and packaged, thus the preparation is completed.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The following examples and comparative examples employ the following raw materials of components:
the aqueous acrylic emulsion is Setaqua 6718 newly developed and produced in the United states;
the aqueous polyurethane dispersion is newly developed and produced in the United statesPU F125；
The coupling agent is Coatosil 2287 developed in the United states of America;
the PH regulator is developed and produced by Wacker in Germany-DMEA；
The thickener is ACRYSOL RM-12W developed and produced by Dow in America;
the film forming additive is DPNB with CAS number 29911-28-2 which is developed and produced by Dow in the United states;
the organosilicon defoamer is tego FOAMEX 810 produced by Germany Di high research and development;
the organosilicon wetting agent is TEGO Twain 4100 manufactured by Germany Digao;
the rest of the component raw materials without special description are conventional commercial products.
Example 1
This example contains the following preparation raw materials by weight:
55g of aqueous acrylic emulsion, 18g of aqueous polyurethane dispersion, 3g of film forming additive, 1.5g of coupling agent, 1.5g of polyurethane (HEUR) thickener, 0.3g of aqueous dispersing agent and 6g of deionized water.
The pH of the system was controlled to 8.0 by the addition of a pH adjustor.
The preparation method comprises the following steps:
(1) Sequentially adding the aqueous acrylic emulsion, the aqueous polyurethane dispersion and the coupling agent into a production container, and stirring uniformly at the rotating speed of 800 rpm;
(2) The rotation speed is reduced to 600rpm, the water-based dispersing agent is added in sequence, the rotation speed is increased to 800rpm, the dispersing is carried out for 12 minutes, and the scraping plate confirms that no shrinkage cavity exists;
(3) Maintaining the rotating speed, and adding the mixed solution of the film forming additive and the deionized water into a production cylinder in a linear and slow way;
(4) The rotation speed is reduced to 600rpm, the thickener is added, dispersed for 15 minutes, filtered by a 300-mesh filter bag and packaged, and the preparation is completed.
Example 2
This example contains the following preparation raw materials by weight:
55g of aqueous acrylic emulsion, 18g of aqueous polyurethane dispersion, 3g of film forming additive, 1.5g of coupling agent, 1.5g of polyurethane (HEUR) thickener, 0.3g of aqueous dispersing agent, 0.3g of organosilicon antifoaming agent, 0.4g of organosilicon wetting agent and 6g of deionized water.
The pH of the system was controlled to 8.0 by the addition of a pH adjustor.
The preparation method comprises the following steps:
(1) Sequentially adding the aqueous acrylic emulsion, the aqueous polyurethane dispersion and the coupling agent into a production container, and stirring uniformly at the rotating speed of 800 rpm;
(2) Maintaining the rotating speed, adding a defoaming agent and a wetting agent, increasing the rotating speed to 1000rpm, dispersing for 10 minutes, preparing a film on a clean glass plate by using an applicator, and carrying out the next step if the wet film is determined to have no shrinkage cavity;
(3) The rotation speed is reduced to 600rpm, the water-based dispersing agent is added in sequence, the rotation speed is increased to 800rpm, the dispersing is carried out for 12 minutes, and the scraping plate confirms that no shrinkage cavity exists;
(4) Maintaining the rotating speed, and adding the mixed solution of the film forming additive and the deionized water into a production cylinder in a linear and slow way;
(5) The rotation speed is reduced to 600rpm, the thickener is added, dispersed for 15 minutes, filtered by a 300-mesh filter bag and packaged, and the preparation is completed.
Example 3
This example contains the following preparation raw materials by weight:
50g of aqueous acrylic emulsion, 15g of aqueous polyurethane dispersion, 2g of film forming additive, 1g of coupling agent, 1g of polyurethane (HEUR) thickener, 0.2g of aqueous dispersant, 1g of fumed silica, 0.1g of organosilicon defoamer, 0.3g of organosilicon wetting agent and 4g of deionized water.
The pH of the system was controlled to 8.0 by the addition of a pH adjustor.
The preparation method comprises the following steps:
(1) Sequentially adding the aqueous acrylic emulsion, the aqueous polyurethane dispersion and the coupling agent into a production container, and stirring uniformly at the rotating speed of 700 rpm;
(2) Maintaining the rotating speed, adding a defoaming agent and a wetting agent, increasing the rotating speed to 1000rpm, dispersing for 10 minutes, preparing a film on a clean glass plate by using an applicator, and carrying out the next step if the wet film is determined to have no shrinkage cavity;
(3) The rotation speed is reduced to 500rpm, the water-based dispersing agent and the silicon dioxide are added in sequence, the rotation speed is increased to 800rpm, the dispersion is carried out for 10 minutes, and the scraping plate confirms that no shrinkage cavity exists;
(4) Maintaining the rotating speed, and adding the mixed solution of the film forming additive and the deionized water into a production cylinder in a linear and slow way;
(5) The rotation speed is reduced to 500rpm, the thickener is added, dispersed for 50 minutes, filtered by a 200-mesh filter bag and packaged, and the preparation is completed.
Example 4
This example contains the following preparation raw materials by weight:
55g of aqueous acrylic emulsion, 18g of aqueous polyurethane dispersion, 3g of film forming additive, 1.5g of coupling agent, 1.5g of polyurethane (HEUR) thickener, 0.3g of aqueous dispersing agent, 1.5g of silicon dioxide, 0.3g of organosilicon antifoaming agent, 0.4g of organosilicon wetting agent and 6g of deionized water.
The pH of the system was controlled to 9.0 by adding a pH adjustor.
The preparation method comprises the following steps:
(1) Sequentially adding the aqueous acrylic emulsion, the aqueous polyurethane dispersion and the coupling agent into a production container, and stirring uniformly at the rotating speed of 800 rpm;
(2) Maintaining the rotating speed, adding a defoaming agent and a wetting agent, increasing the rotating speed to 1000rpm, dispersing for 10 minutes, preparing a film on a clean glass plate by using an applicator, and carrying out the next step if the wet film is determined to have no shrinkage cavity;
(3) The rotation speed is reduced to 600rpm, the water-based dispersing agent and the silicon dioxide are added in sequence, the rotation speed is increased to 800rpm, the dispersion is carried out for 12 minutes, and the scraping plate confirms that no shrinkage cavity exists;
(4) Maintaining the rotating speed, and adding the mixed solution of the film forming additive and the deionized water into a production cylinder in a linear and slow way;
(5) The rotation speed is reduced to 600rpm, the thickener is added, dispersed for 15 minutes, filtered by a 300-mesh filter bag and packaged, and the preparation is completed.
Example 5
This example contains the following preparation raw materials by weight:
60g of aqueous acrylic emulsion, 20g of aqueous polyurethane dispersion, 4g of film forming additive, 1.5g of coupling agent, 2g of polyurethane (HEUR) thickener, 0.5g of aqueous dispersing agent, 2g of silicon dioxide, 0.5g of organosilicon antifoaming agent, 0.5g of organosilicon wetting agent and 8g of deionized water.
The pH of the system was controlled to 10.0 by adding a pH adjustor.
The preparation method comprises the following steps:
(1) Sequentially adding the aqueous acrylic emulsion, the aqueous polyurethane dispersion and the coupling agent into a production container, and stirring uniformly at 900 rpm;
(2) Maintaining the rotating speed, adding a defoaming agent and a wetting agent, increasing the rotating speed to 1200rpm, dispersing for 8 minutes, preparing a film on a clean glass plate by using an applicator, and carrying out the next step if the wet film is determined to have no shrinkage cavity;
(3) The rotation speed is reduced to 700rpm, the water-based dispersing agent and the silicon dioxide are added in sequence, the rotation speed is increased to 1000rpm, the dispersion is carried out for 15 minutes, and the scraping plate confirms that no shrinkage cavity exists;
(4) Maintaining the rotating speed, and adding the mixed solution of the film forming additive and the deionized water into a production cylinder in a linear and slow way;
(5) The rotation speed is reduced to 700rpm, the thickener is added, dispersed for 10 minutes, filtered by a 400-mesh filter bag and packaged, and the preparation is completed.
Comparative example 1
This example contains the following preparation raw materials by weight:
50g of aqueous acrylic emulsion, 15g of aqueous polyurethane dispersion, 2g of film forming additive, 1g of coupling agent, 1g of polyurethane (HEUR) thickener, 0.2g of aqueous dispersant, 1g of silicon dioxide, 0.1g of organosilicon defoamer, 0.3g of organosilicon wetting agent and 4g of deionized water.
The pH of the system was controlled to 7.0 by the addition of a pH adjustor.
The preparation method comprises the following steps:
(1) Sequentially adding the aqueous acrylic emulsion, the aqueous polyurethane dispersion and the coupling agent into a production container, and stirring uniformly at the rotating speed of 700 rpm;
(2) Maintaining the rotating speed, adding a defoaming agent and a wetting agent, increasing the rotating speed to 1000rpm, dispersing for 10 minutes, preparing a film on a clean glass plate by using an applicator, and carrying out the next step if the wet film is determined to have no shrinkage cavity;
(3) The rotation speed is reduced to 500rpm, the water-based dispersing agent and the silicon dioxide are added in sequence, the rotation speed is increased to 800rpm, the dispersion is carried out for 10 minutes, and the scraping plate confirms that no shrinkage cavity exists;
(4) Maintaining the rotating speed, and adding the mixed solution of the film forming additive and the deionized water into a production cylinder in a linear and slow way;
(5) The rotation speed is reduced to 500rpm, the thickener is added, dispersed for 50 minutes, filtered by a 200-mesh filter bag and packaged, and the preparation is completed.
Comparative example 2
This example contains the following preparation raw materials by weight:
60g of aqueous acrylic emulsion, 20g of aqueous polyurethane dispersion, 4g of film forming additive, 1.5g of coupling agent, 2g of polyurethane (HEUR) thickener, 0.5g of aqueous dispersing agent, 2g of silicon dioxide, 0.5g of organosilicon antifoaming agent, 0.5g of organosilicon wetting agent and 8g of deionized water.
The pH of the system was controlled to 11.0 by the addition of a pH adjustor.
The preparation method comprises the following steps:
(1) Sequentially adding the aqueous acrylic emulsion, the aqueous polyurethane dispersion and the coupling agent into a production container, and stirring uniformly at 900 rpm;
(2) Maintaining the rotating speed, adding a defoaming agent and a wetting agent, increasing the rotating speed to 1200rpm, dispersing for 8 minutes, preparing a film on a clean glass plate by using an applicator, and carrying out the next step if the wet film is determined to have no shrinkage cavity;
(3) The rotation speed is reduced to 700rpm, the water-based dispersing agent and the silicon dioxide are added in sequence, the rotation speed is increased to 1000rpm, the dispersion is carried out for 15 minutes, and the scraping plate confirms that no shrinkage cavity exists;
(4) Maintaining the rotating speed, and adding the mixed solution of the film forming additive and the deionized water into a production cylinder in a linear and slow way;
(5) The rotation speed is reduced to 700rpm, the thickener is added, dispersed for 10 minutes, filtered by a 400-mesh filter bag and packaged, and the preparation is completed.
Comparative example 3
The comparative example comprises the following preparation raw materials by weight:
55g of aqueous acrylic emulsion, 18g of aqueous polyurethane dispersion, 3g of film forming additive, 1.5g of coupling agent, 1.5g of polyurethane (HEUR) thickener, 0.3g of aqueous dispersing agent, 1.5g of silicon dioxide, 0.3g of organosilicon antifoaming agent, 0.4g of organosilicon wetting agent and 6g of deionized water.
The pH of the system was controlled to 8.0 by adding a pH adjustor, which was AMP-95 in this comparative example.
The preparation method comprises the following steps:
(1) Sequentially adding the aqueous acrylic emulsion, the aqueous polyurethane dispersion and the coupling agent into a production container, and stirring uniformly at the rotating speed of 800 rpm;
(2) Maintaining the rotating speed, adding a defoaming agent and a wetting agent, increasing the rotating speed to 1000rpm, dispersing for 10 minutes, preparing a film on a clean glass plate by using an applicator, and carrying out the next step if the wet film is determined to have no shrinkage cavity;
(3) The rotation speed is reduced to 600rpm, the water-based dispersing agent and the silicon dioxide are added in sequence, the rotation speed is increased to 800rpm, the dispersion is carried out for 12 minutes, and the scraping plate confirms that no shrinkage cavity exists;
(4) Maintaining the rotating speed, and adding the mixed solution of the film forming additive and the deionized water into a production cylinder in a linear and slow way;
(5) The rotation speed is reduced to 600rpm, the thickener is added, dispersed for 15 minutes, filtered by a 300-mesh filter bag and packaged, and the preparation is completed.
Comparative example 4
The comparative example comprises the following preparation raw materials by weight:
55g of aqueous acrylic emulsion, 18g of aqueous polyurethane dispersion, 3g of film forming additive, 1.5g of coupling agent, 1.5g of polyurethane (HEUR) thickener, 0.3g of aqueous dispersing agent, 1.5g of silicon dioxide, 0.3g of organosilicon antifoaming agent, 0.4g of organosilicon wetting agent and 6g of deionized water.
The pH of the system was controlled to 8.0 by the addition of a pH adjustor.
The wetting agent of this comparative example is TEGO Wet 270.
The preparation method comprises the following steps:
(1) Sequentially adding the aqueous acrylic emulsion, the aqueous polyurethane dispersion and the coupling agent into a production container, and stirring uniformly at the rotating speed of 800 rpm;
(2) Maintaining the rotating speed, adding a defoaming agent and a wetting agent, increasing the rotating speed to 1000rpm, dispersing for 10 minutes, preparing a film on a clean glass plate by using an applicator, and carrying out the next step if the wet film is determined to have no shrinkage cavity;
(3) The rotation speed is reduced to 600rpm, the water-based dispersing agent and the silicon dioxide are added in sequence, the rotation speed is increased to 800rpm, the dispersion is carried out for 12 minutes, and the scraping plate confirms that no shrinkage cavity exists;
(4) Maintaining the rotating speed, and adding the mixed solution of the film forming additive and the deionized water into a production cylinder in a linear and slow way;
(5) The rotation speed is reduced to 600rpm, the thickener is added, dispersed for 15 minutes, filtered by a 300-mesh filter bag and packaged, and the preparation is completed.
Comparative example 5
The comparative example comprises the following preparation raw materials by weight:
55g of aqueous acrylic emulsion, 18g of aqueous polyurethane dispersion, 3g of film forming additive, 1.5g of coupling agent, 1.5g of thickener, 0.3g of aqueous dispersing agent, 0.3g of organosilicon defoamer, 0.4g of organosilicon wetting agent and 6g of deionized water.
The pH of the system was controlled to 8.0 by the addition of a pH adjustor.
The thickener of this comparative example is a cellulose-based (HEC) thickener.
The preparation method comprises the following steps:
(1) Sequentially adding the aqueous acrylic emulsion, the aqueous polyurethane dispersion and the coupling agent into a production container, and stirring uniformly at the rotating speed of 800 rpm;
(2) Maintaining the rotating speed, adding a defoaming agent and a wetting agent, increasing the rotating speed to 1000rpm, dispersing for 10 minutes, preparing a film on a clean glass plate by using an applicator, and carrying out the next step if the wet film is determined to have no shrinkage cavity;
(3) The rotation speed is reduced to 600rpm, the water-based dispersing agent is added in sequence, the rotation speed is increased to 800rpm, the dispersing is carried out for 12 minutes, and the scraping plate confirms that no shrinkage cavity exists;
(4) Maintaining the rotating speed, and adding the mixed solution of the film forming additive and the deionized water into a production cylinder in a linear and slow way;
(5) The rotation speed is reduced to 600rpm, the thickener is added, dispersed for 15 minutes, filtered by a 300-mesh filter bag and packaged, and the preparation is completed.
(one) expiration date determination
Storing the examples 1 to 5 at normal temperature (25+ -5deg.C) for 1 year, taking out the base coat in a fixed period, spraying the base coat on different base coats according to the construction of main agent: water=100:5, and coating the base coat with a coating weight of 120-150g/m 2 After 24h of drying, the adhesion test (cross-hatch spacing 2 mm) was carried out according to GBT9286-1998 "cross-hatch test of paint and varnish".
The experimental detection results are as follows:
example 1:
| duration of storage | Adhesion to PU primer | Adhesion to PE primer | Adhesion to UV primer |
| For 1 day | Level 0 | Level 0 | Level 0 |
| For 1 week | Level 0 | Level 0 | Level 0 |
| 1 month | Level 0 | Level 0 | Level 0 |
| For 3 months | Level 0 | Level 0 | Level 0 |
| 6 months of | Level 1 | Level 1 | Level 1 |
| For 1 year | Level 2 | Level 2 | Level 2 |
Example 2:
| duration of storage | Adhesion to PU primer | Adhesion to PE primer | Adhesion to UV primer |
| For 1 day | Level 0 | Level 0 | Level 0 |
| For 1 week | Level 0 | Level 0 | Level 0 |
| 1 month | Level 0 | Level 0 | Level 0 |
| For 3 months | Level 0 | Level 0 | Level 0 |
| 6 months of | Level 1 | Level 1 | Level 1 |
| For 1 year | Level 2 | Level 2 | Level 2 |
Example 3:
| duration of storage | Adhesion to PU primer | Adhesion to PE primer | UV primerUpper adhesion force |
| For 1 day | Level 0 | Level 0 | Level 0 |
| For 1 week | Level 0 | Level 0 | Level 0 |
| 1 month | Level 0 | Level 0 | Level 0 |
| For 3 months | Level 0 | Level 0 | Level 0 |
| 6 months of | Level 1 | Level 1 | Level 1 |
| For 1 year | Level 2 | Level 2 | Level 2 |
Example 4:
| duration of storage | Adhesion to PU primer | Adhesion to PE primer | Adhesion to UV primer |
| For 1 day | Level 0 | Level 0 | Level 0 |
| For 1 week | Level 0 | Level 0 | Level 0 |
| 1 month | Level 0 | Level 0 | Level 0 |
| For 3 months | Level 0 | Level 0 | Level 0 |
| 6 months of | Level 1 | Level 1 | Level 1 |
| For 1 year | Level 2 | Level 2 | Level 2 |
Example 5:
| duration of storage | Adhesion to PU primer | Adhesion to PE primer | Adhesion to UV primer |
| For 1 day | Level 0 | Level 0 | Level 0 |
| For 1 week | Level 0 | Level 0 | Level 0 |
| 1 month | Level 0 | Level 0 | Level 0 |
| For 3 months | Level 0 | Level 0 | Level 0 |
| 6 months of | Level 1 | Level 1 | Level 1 |
| For 1 year | Level 2 | Level 2 | Level 2 |
From the above measurement, it can be seen that: the invention can be stably stored for at least 6 months, has excellent adhesive force and can be firmly adhered to various different priming paint.
(II) Performance test
Examples 1 to 5 and comparative examples 1 to 5 were left standing at normal temperature (25.+ -. 5 ℃) for 6 months, then coated and dried with reference to the "PU primer" item of the above test (one), and performance test was conducted according to GB/T23999-2009 Water-borne carpentry paint for interior decoration.
Variations and modifications of the above-described embodiments may be made by those skilled in the art in light of the foregoing disclosure and are accordingly intended to be within the scope of the appended claims. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (6)
1. The universal yellowing-resistant single-component finish paint suitable for various priming paint is characterized by comprising the following preparation raw materials in parts by weight:
50-60 parts of aqueous acrylic emulsion, 15-20 parts of aqueous polyurethane dispersoid, 2-4 parts of film forming additive, 1-2 parts of coupling agent, 1-2 parts of thickener, 0.2-0.5 part of aqueous dispersing agent, 0.1-0.5 part of pH regulator and 4-8 parts of deionized water;
the coupling agent is Coatosil 2287 developed and produced by Michaelsen;
the aqueous acrylic emulsion is Setaqua 6718 which is newly developed and produced in the U.S.A.;
the aqueous polyurethane dispersion is SETAQUA which is newly developed and produced in the United states ® PU F125；
The thickener is polyurethane thickener;
the pH value of the pH regulator is controlled to be more than or equal to 8.0 by adding 10 of a pH regulator system, wherein the pH regulator is VOK produced by Walker research and development of Germany ® -DMEA；
Also comprises 0.3-0.5 part of organosilicon wetting agent, wherein the organosilicon wetting agent is TEGO Twain 4100 manufactured by Germany Digao.
2. The universal yellowing resistant one-component topcoat for multiple primers of claim 1, further comprising 1-2 parts silica.
3. The universal yellowing resistant one-component topcoat for use with a variety of primers of claim 1 or 2, further comprising 0.1-0.5 parts of a silicone defoamer;
the organosilicon defoamer is tego FOAMEX 810 produced by Germany Di high research and development.
4. The universal yellowing resistant one-component topcoat for use with a variety of primers according to claim 1, wherein the thickener is ACRYSOL RM-12W manufactured by DOW research and development in united states.
5. The universal yellowing resistant one-component topcoat for use with multiple primers according to claim 1 or 2, wherein said film forming aid is DPNB, CAS No. 29911-28-2, manufactured by DOW research and development in united states.
6. A method for preparing a universal yellowing resistant single component topcoat for a variety of primers according to any one of claims 1 to 5, comprising the steps of:
(1) Sequentially adding the water-based acrylic emulsion, the water-based polyurethane dispersion and the coupling agent in a preset weight part into a production container, and stirring uniformly at a rotating speed of 700-900 rpm;
(2) Maintaining the rotating speed, adding a defoaming agent and a wetting agent in a preset weight part, increasing the rotating speed to 1000-1200rpm, dispersing for 8-10 minutes, and preparing a film on a clean glass plate by using an applicator to determine that a wet film has no shrinkage cavity;
(3) The rotating speed is reduced to 500-700rpm, the water-based dispersing agent and the silicon dioxide with preset weight parts are added in sequence, the rotating speed is increased to 800-1000rpm, the dispersing is carried out for 10-15 minutes, and the scraping plate confirms that no shrinkage cavity exists;
(4) Maintaining the rotating speed, and adding the mixed solution of the film forming auxiliary agent and deionized water in a preset weight part into a production cylinder in a linear and slow way;
(5) The rotating speed is reduced to 500-700rpm, the thickener with preset weight portions is added, dispersed for 10-20 minutes, filtered by a filter bag with 200-400 meshes, and packaged, thus the preparation is completed.
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