CN112251123B - Ultraviolet-resistant color modifier and preparation method thereof - Google Patents
Ultraviolet-resistant color modifier and preparation method thereof Download PDFInfo
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- CN112251123B CN112251123B CN202011029627.1A CN202011029627A CN112251123B CN 112251123 B CN112251123 B CN 112251123B CN 202011029627 A CN202011029627 A CN 202011029627A CN 112251123 B CN112251123 B CN 112251123B
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses an ultraviolet-resistant color modifier, which is prepared from the following raw materials in parts by weight: 15-20 parts of aqueous polyurethane resin, 1-10 parts of ultraviolet-resistant resin particles, 0.1-0.5 part of pH regulator, 0.1-0.3 part of aqueous wetting agent, 0.1-0.3 part of aqueous defoaming agent, 0.1-0.3 part of aqueous thickening rheological agent, 3.0-5.0 parts of cosolvent, 0.1-0.2 part of silane coupling agent, 70-80 parts of hydrophilic solvent and 1-10 parts of water, wherein the ultraviolet-resistant resin particles are internally wrapped with base material, pigment and ultraviolet absorbent, the resin particles are selected from one or more of polypropylene resin, polycarbonate resin, nylon resin, polyether ether ketone resin and polyether sulfone resin, the base material is nano inorganic particles, and the particle size of the nano inorganic particles is 1-100 nm. The invention does not need to add or change the original production equipment, has the advantages of quick drying, good adhesive force, satisfying the requirement of flow line coating, uniform mixing of the ultraviolet absorbent and the pigment, avoiding the problem of easy separation after long-time standing, and being suitable for industrialized mass production.
Description
Technical Field
The invention relates to the field of coatings, in particular to the field of water-based varnish used for furniture and woodware.
Background
Due to further restrictions of VOC emissions from coatings by national environmental policy, waterborne coatings are increasingly used in wood coatings by virtue of their environmental protection and low VOC emissions. The color in the prior furniture production coating is prepared by adding color modifier or color modifier essential oil and color modifier, and the drying time is longer. In the coating process, the water-based finish paint can be applied only after the ultraviolet-resistant color modifier is applied and dried, so that the coating efficiency is greatly influenced, and the time for the finished furniture to go into the market from the production line is prolonged. In the process of automatic assembly line coating of furniture, finishing the color, namely spraying finish paint (namely commonly called a 'wet-on-wet' process), the problems of blooming, oil leakage, poor adhesion and the like often occur, and the coating of processes such as UV bottom water surface, PU bottom water surface and the like cannot be met. Therefore, research and development of the ultraviolet-resistant color modifier which is suitable for wet-on-wet process coating, meets the requirements of process coating of UV bottom water surface, PU bottom water surface and the like, is easy and convenient to construct, has good adhesive force and is dried quickly is imperative, and has strategic significance for oil-to-water modification of furniture enterprises. However, under outdoor irradiation, the pigment in the coating is easy to fade due to ultraviolet irradiation, and an ultraviolet absorbent needs to be added, but the existing ultraviolet absorbent is not easy to dissolve in water, and if the pigment is stirred unevenly during use, the ultraviolet resistance of the coating is different.
Disclosure of Invention
The invention aims to provide an ultraviolet-resistant color modifier which is quick-drying, has good adhesive force with various primers, is combined by an ultraviolet absorber and a pigment, solves the problem of different ultraviolet resistance of coatings caused by uneven stirring, and meets the application requirements of furniture assembly line coating, and a preparation method thereof.
In order to achieve the purpose, the invention provides an ultraviolet-resistant color modifier which is prepared from the following raw materials in parts by weight: 15-20 parts of aqueous polyurethane resin, 1-10 parts of ultraviolet-resistant resin particles, 0.1-0.5 part of pH regulator, 0.1-0.3 part of aqueous wetting agent, 0.1-0.3 part of aqueous defoaming agent, 0.1-0.3 part of aqueous thickening rheological agent, 3.0-5.0 parts of cosolvent, 0.1-0.2 part of silane coupling agent, 70-80 parts of hydrophilic solvent and 1-10 parts of water, wherein the ultraviolet-resistant resin particles are internally wrapped with base material, pigment and ultraviolet absorbent, the resin particles are selected from one or more of polypropylene resin, polycarbonate resin, nylon resin, polyether ether ketone resin and polyether sulfone resin, the base material is nano inorganic particles, and the particle size of the nano inorganic particles is 1-100 nm.
Further, the aqueous polyurethane resin is anionic aliphatic polyester polycarbonate aqueous polyurethane, and the solid content is 35%.
Further, the pH regulator is an aqueous multifunctional auxiliary agent, the aqueous multifunctional auxiliary agent is an AMP-95 multifunctional auxiliary agent, the aqueous wetting agent is a butynediol surfactant, and the aqueous defoaming agent is a polydimethylsiloxane solution.
Further, the aqueous thickening rheological agent is a polyurethane associated thickening rheological additive, and the cosolvent is ethylene glycol monobutyl ether.
Further, the silane coupling agent is an epoxy functional silane.
Further, the hydrophilic solvent is absolute ethyl alcohol.
Further, the ultraviolet absorbent is a hydroxyl-containing ultraviolet absorbent.
Further, the ultraviolet-resistant resin particles are formed by polymerizing resin particle monomers, and the resin particle monomers are selected from one or more of hydroxyl-containing monomers and amino-containing monomers.
Further, the preparation method of the ultraviolet-resistant resin particles comprises the following steps:
step 1: taking resin particle monomer raw materials into the solution, adding the base materials, and oscillating to form uniform mixed solution;
step 2: coating and curing the mixed solution to form a coating;
and step 3: crushing and grinding the coating to obtain resin particles with 300-400 meshes;
and 4, step 4: mixing the resin particles with phosphorus oxychloride according to the ratio of 1: 0.1, stirring and reacting for 1-3 hours at room temperature, removing phosphorus oxychloride by vacuum distillation, adding an ultraviolet absorbent with hydroxyl, and continuously stirring and reacting for 1-3 hours at room temperature;
and 5: soaking the mixture obtained in the step (4) in the solution, adding the pigment and the resin particle monomer raw materials, and oscillating to form uniform mixed solution;
step 6: coating and curing the mixed solution to form a coating;
and 7: and crushing and grinding the coating to obtain resin particles with 50-100 meshes, namely the ultraviolet-resistant resin particles.
Further, the method comprises the following steps:
step 1, adding waterborne polyurethane resin and ultraviolet-resistant resin particles into a dispersion kettle according to the formula amount, adding waterborne multifunctional auxiliary agent according to the weight percentage under the stirring state of 500r/min, and stirring for 5-10 min;
step 2, sequentially adding the water-based wetting agent, the water-based defoaming agent, the water-based thickening rheological agent and the cosolvent under the stirring state of 500r/min, and dispersing for 10-15min at 1000r/min until no shrinkage cavity exists;
and 3, reducing the rotating speed to 500-600r/min, gradually adding the silane coupling agent, the hydrophilic solvent and the water, fully stirring for 10 minutes after the addition until the viscosity is stable, filtering through a 300-mesh filter cloth, discharging and packaging.
Further, the preparation method of the ultraviolet-resistant resin particles comprises the following steps:
step 1: taking 50-100 parts by weight of resin particle monomer raw material into 10-30 parts by weight of solution, adding 1-5 parts by weight of base material, and oscillating to form uniform mixed solution;
step 2: coating and curing the mixed solution to form a coating;
and step 3: crushing and grinding the coating to obtain resin particles with 300-400 meshes;
and 4, step 4: mixing the resin particles with phosphorus oxychloride according to the ratio of 1: 0.1, stirring and reacting for 1-3 hours at room temperature, removing phosphorus oxychloride by vacuum distillation, adding 2-5 parts by weight of hydroxyl-containing ultraviolet absorbent, continuously stirring and reacting for 1-3 hours at room temperature, and vacuum distilling;
and 5: soaking resin particles in 10-50 parts by weight of solution, adding 2-10 parts by weight of pigment and 100-200 parts by weight of resin particle monomer raw materials, and oscillating to form uniform mixed solution;
step 6: coating and curing the mixed solution to form a coating;
and 7: and crushing and grinding the coating to obtain resin particles with 50-100 meshes, namely the ultraviolet-resistant resin particles.
Still further, 10 to 20% by weight of the resin fine particle monomer of the step 5 is a diisocyanate monomer.
Further, the solution in the step 5 is acetone.
Compared with the prior art, the ultraviolet absorbent can be uniformly mixed with the pigment by wrapping the base material, the pigment and the ultraviolet absorbent in the resin particles, so that the problem of easy layering due to long-time standing is avoided, the coating requirement of an assembly line is met, and the ultraviolet absorbent is suitable for industrial mass production.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The components of embodiments 1-5 of the invention are as follows:
the aqueous polyurethane resin is solvent-free, low-viscosity, anionic aliphatic polyester polycarbonate aqueous polyurethane without free isocyanate groups, the solid content is 35 parts by weight, the pH is 7.5-8.5, the MFFT is 5 ℃, the density is 1.05g/cm3, and the aqueous polyurethane resin with the trade name U9150 of the European Union company can be selected; the aqueous multifunctional additive adopts AMP-95 multifunctional additive, has the functions of regulating pH value, synergistically enhancing dispersing agent, defoaming agent, flatting agent and the like, and can be AMP-95 product of Dow chemistry; the water-based wetting agent is a butynediol surfactant which is prepared from 50% surfynol 104 and 50% dipropylene glycol, belongs to a gemini nonionic surfactant, has the functions of wetting, leveling, defoaming and the like, and can be selected from products of a winning company with the brand of surfynol 104 DPM; the water-based defoaming agent is a specially modified polydimethylsiloxane solution, can be used for pure water-based coatings and polymer emulsion-based coatings, and contains a cosolvent. Can be selected from Corning corporation under the brand name of
1293 of a product; the aqueous thickening rheological agent is a polyurethane associative thickening rheological aid, and PUR40 of Ming Ling company or a product of Hamming chemical with the trade name of 105A can be adopted; the cosolvent is ethylene glycol monobutyl ether, and can be a commercial industrial product; the silane coupling agent is epoxy functional group silane, is colorless transparent liquid in appearance, is dissolved in organic solvents such as acetone, benzene, ether, halogenated hydrocarbon and the like, and is hydrolyzed in water. The boiling point is 290 ℃, the density (25 ℃, g/ml) is 1.065, the refractive index ND25 is 1.426, the flash point is 110 ℃, the content is more than or equal to 97 parts by weight, and products with the trade name of Z-6040 of Dow Corning company or the trade name of KH-560 of Nanjing Dow Corning company can be selected; the hydrophilic solvent is absolute ethyl alcohol, and can be selected from commercial industrial products.
Step 1, adding waterborne polyurethane resin into a dispersion kettle according to the formula amount, adding waterborne multifunctional auxiliary agent according to the weight percentage under the stirring state of 500r/min, and stirring for 5-10 min;
step 2, sequentially adding the water-based wetting agent, the water-based defoaming agent, the water-based thickening rheological agent and the cosolvent under the stirring state of 500r/min, and dispersing for 10-15min at 1000r/min until no shrinkage cavity exists;
step 3, reducing the rotating speed to 500-600r/min, gradually adding the silane coupling agent, the hydrophilic solvent and the water, and fully stirring for 10 minutes after the silane coupling agent, the hydrophilic solvent and the water are added until the viscosity is stable; filtering with 300 mesh filter cloth, discharging, and packaging.
The preparation method of the ultraviolet-resistant resin particles of the embodiments 1 to 5 of the invention is as follows:
step 1: taking 25 parts by weight of hydroxyl acrylate and 25 parts by weight of amino acrylate into 30 parts by weight of water, adding 5 parts by weight of 1-100nm mica powder, and oscillating to form uniform mixed liquid;
step 2: coating and curing the mixed solution, and drying at 150 ℃ for 4 hours to form a coating;
and step 3: crushing, grinding and sieving the coating to obtain 300-400 mesh resin particles;
and 4, step 4: mixing the resin particles with phosphorus oxychloride according to the ratio of 1: mixing at a weight ratio of 0.1, stirring and reacting at room temperature for 3 hours, vacuum distilling to remove phosphorus oxychloride, adding 5 parts by weight of 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole, stirring and reacting at room temperature for 3 hours, and vacuum distilling;
and 5: soaking resin particles in 50 parts by weight of water, adding 10 parts by weight of pigment and 100 parts by weight of hydroxyl acrylate, and uniformly oscillating;
step 6: coating and curing the mixed solution, and drying at 150 ℃ for 4 hours to form a coating;
and 7: and crushing, grinding and sieving the coating to obtain resin particles of 50-100 meshes, namely the ultraviolet-resistant resin particles of the embodiment of the invention.
The compositions of examples 1 to 5 are shown in the following table (Table 1) (unit: kg).
The invention mainly utilizes the characteristics of good adhesive force, good appearance transparency, good compatibility with ethanol, small shrinkage, good water resistance and narrow particle size distribution of resin colloidal particles in the formula as a film forming substance, introduces a silane coupling agent for hydrolysis to generate silanol groups which react with carboxyl or hydroxyl in resin to further increase the adhesive force and the final chemical resistance of a color correction layer and enhance the balance of the whole interfacial tension, and solves the problems of blooming and oil leakage caused by poor surface tension in the wet-on-wet process.
The water-based paint has the advantages that bubbles are generated in the production construction process, the defects of a coating film are caused due to the existence of the bubbles, the improvement is realized by using a defoaming agent, the defoaming agent can provide a good defoaming effect, the defects of the coating film are prevented, but the defoaming agent with too strong defoaming capability easily causes the problem of shrinkage cavity and the problem of large local difference of interfacial tension. The invention selects the wetting agent with defoaming function and the polyether siloxane copolymer emulsion which has good compatibility, moderate defoaming property and no influence on transparency to be matched for use.
In order to obtain better drying speed, the invention selects the absolute ethyl alcohol which is an environment-friendly solvent with strong hydrophilicity and high volatilization rate, and then the absolute ethyl alcohol is matched with the ethylene glycol monobutyl ether to swell the resin colloidal particles and adjust the volatilization gradient, thereby improving the problems of blooming and oil leakage when the finish paint is coated by the wet-on-wet process.
The construction test process of the ultraviolet-resistant color modifier comprises the following steps:
step 1, plates with various primers are carefully sanded and leveled without bright spots, and then dust and oil are removed;
and 2, spraying the ultraviolet-resistant color modifier prepared in the embodiment 1-5 on the surface of the plate.
And 3, immediately spraying the water-based single-component varnish on the plate sprayed with the ultraviolet-resistant color modifier, and then, carrying out dry curing, observation and testing.
The primer comprises a UV transparent primer, a PU transparent primer, a PE transparent primer and a water-based transparent primer which are conventionally rolled or sprayed.
Table 1-5 the ultraviolet correction agent was allowed to stand at room temperature for 10 days, and then directly applied to the water-based transparent primer by the above-mentioned application process, and the properties of the obtained coating film are shown in table 2.
Table 2 test results of main physical properties of the coating film (test of physical and chemical properties according to GB/T23999-
As can be seen from tables 1 and 2, the coating film formed by the 5-component ultraviolet-resistant color modifier has the characteristics of good adhesion, uniform and clear color, water resistance, cold and heat cycle resistance and the like. The reduction of the ethanol dosage and the increase of the water dosage cause the reduction of the drying speed and the reduction of the interfacial tension balance caused by the change of the surface tension of the system, and the phenomenon of the flowering is generated during the wet-on-wet construction. The best solution can be obtained by considering the comprehensive cost effect as example 2.
The ultraviolet-resistant color modifier of the example 2 is added with water-based color concentrate for color adjustment, matched with water-based single-component clear finish, and constructed on different primers such as water-based transparent primer, UV transparent primer, PU transparent primer, PE transparent primer and the like according to a 'wet-on-wet' process of immediately spraying water-based finish after color modification to obtain transparent coating with the main properties shown in Table 3.
TABLE 3 test results of main physical properties of coating films on different transparent primers (test of physical and chemical properties according to GB/T23999-
Comparative experiment: the ultraviolet-resistant color modifier is compared with the water-based single-component and water-based two-component color modifying products in the existing market, and the comparison of the basic information of the products is shown in a table 4:
after the three color modifiers are added with the same amount of water-based color concentrates for color mixing, spraying the water-based single-component top-coat paint on different primers and then immediately spraying the water-based single-component top-coat paint for testing, and after curing and curing for 7 days, testing key performance results according to a national standard method GB/T23999-2009 are shown in Table 5:
as can be seen from the data in tables 4 and 5, the comparative test of the product of the invention and the single-component and two-component products used in the domestic market at present shows that: the product of the invention has faster drying speed and good adhesive force, can be matched with water-based finish paint to be applied to different types of priming paint plates, has comprehensive application range, has overall performance superior to that of products used in the current market, and has more comprehensive and wide application.
The invention selects special anionic aliphatic polyester polycarbonate waterborne polyurethane and coupling agent to enhance the interfacial tension balance of the coating and different hydrophilic solvents to adjust the volatilization gradient, utilizes the characteristics of good adhesive force, good appearance transparency, good compatibility with ethanol, small shrinkage rate, good water resistance and narrow particle size distribution of resin colloidal particles, utilizes ethylene glycol monobutyl ether to swell the resin colloidal particles and adjust the volatilization gradient and the hydrophilicity, introduces the silane coupling agent for hydrolysis to generate silanol group to react with carboxyl or hydroxyl group to further increase the adhesive force and the final chemical resistance of a color trimming layer and enhance the balance of the whole interfacial tension, utilizes the characteristic of strong hydrophilicity and high volatilization rate of the environmental-friendly solvent ethanol to accelerate the drying speed, solves the problems of blooming and oil leakage when the finish is coated by a wet-on-wet process, and solves the problem that the finish can be coated only after being dried after the ultraviolet resistant color trimming agent is coated on the existing market, and the difficult point of inconsistent adhesive force on different primer materials is solved, and the method has wide application prospect.
The embodiment of the invention provides a stable storage environment for the pigment by wrapping the base material and the pigment in the resin particles, compared with the comparative example, the ultraviolet absorbent can still be stably matched with the pigment after being placed for a long time, and can also play a good role in protection and reduce the possibility of pigment fading. Meanwhile, the embodiment of the invention adopts isophorone diisocyanate to carry out rapid polymerization reaction with hydroxyl and amino on the surface of the particle, so that the pigment is fixed in the particle, the possibility of falling off of the pigment from the particle is reduced, the particle has pearly color and fluorescence, and the coloring effect is improved.
Finally, it should be noted that the above-mentioned embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the modifications and equivalents of the specific embodiments of the present invention can be made by those skilled in the art after reading the present specification, but these modifications and variations do not depart from the scope of the claims of the present application.
Claims (9)
1. The ultraviolet-resistant color modifier is characterized by comprising the following raw materials in parts by weight: 15-20 parts of aqueous polyurethane resin, 1-10 parts of ultraviolet-resistant resin particles, 0.1-0.5 part of p H regulator, 0.1-0.3 part of aqueous wetting agent, 0.1-0.3 part of aqueous defoaming agent, 0.1-0.3 part of aqueous thickening rheological agent, 3.0-5.0 parts of cosolvent, 0.1-0.2 part of silane coupling agent, 70-80 parts of hydrophilic solvent and 1-10 parts of water, wherein the ultraviolet-resistant resin particles are internally wrapped with base material, pigment and ultraviolet absorbent, the resin particles are selected from one or more of polypropylene resin, polycarbonate resin, nylon resin, polyether ether ketone resin and polyether sulfone resin, the base material is nano inorganic particles, and the particle size of the nano inorganic particles is 1-100 nm;
the preparation method of the ultraviolet-resistant resin particles comprises the following steps:
step 1: taking resin particle monomer raw materials into the solution, adding the base materials, and oscillating to form uniform mixed solution;
step 2: coating and curing the mixed solution to form a coating;
and step 3: crushing and grinding the coating to obtain resin particles with 300-400 meshes;
and 4, step 4: mixing the resin particles with phosphorus oxychloride according to the ratio of 1: 0.1, stirring and reacting for 1-3 hours at room temperature, removing phosphorus oxychloride by vacuum distillation, adding an ultraviolet absorbent with hydroxyl, and continuously stirring and reacting for 1-3 hours at room temperature;
and 5: soaking the mixture obtained in the step (4) in the solution, adding the pigment and the resin particle monomer raw materials, and oscillating to form uniform mixed solution;
step 6: coating and curing the mixed solution to form a coating;
and 7: and crushing and grinding the coating to obtain resin particles with 50-100 meshes, namely the ultraviolet-resistant resin particles.
2. The ultraviolet-resistant color modifier according to claim 1, wherein the aqueous polyurethane resin is anionic aliphatic polyester polycarbonate aqueous polyurethane, and the solid content is 35%.
3. The ultraviolet-resistant color modifier as claimed in claim 1, wherein the p H modifier is an aqueous multifunctional additive, the aqueous multifunctional additive is an AMP-95 multifunctional additive, the aqueous wetting agent is a propargyl glycol surfactant, and the aqueous defoamer is a polydimethylsiloxane solution.
4. The ultraviolet-resistant color modifier according to claim 1, wherein the aqueous thickening rheological agent is a polyurethane associated thickening rheological aid, and the cosolvent is ethylene glycol monobutyl ether.
5. The UV-resistant color modifier according to claim 1, wherein the silane coupling agent is an epoxy functional silane.
6. The UV-resistant color modifier according to claim 1, wherein the hydrophilic solvent is absolute ethyl alcohol.
7. The UV-resistant color modifier according to claim 1, wherein the UV absorber is a hydroxyl-containing UV absorber.
8. The ultraviolet-resistant color modifier according to claim 7, wherein the ultraviolet-resistant resin particles are formed by polymerizing resin particle monomers, and the resin particle monomers are selected from one or more of hydroxyl-containing monomers and amino-containing monomers.
9. The preparation method of the ultraviolet-resistant color modifier according to claim 3, characterized by comprising the following steps:
step 1, adding waterborne polyurethane resin and ultraviolet-resistant resin particles into a dispersion kettle according to the formula amount, adding waterborne multifunctional auxiliary agent according to the parts by weight under the stirring state of 500r/min, and stirring for 5-10 min;
step 2, sequentially adding the water-based wetting agent, the water-based defoaming agent, the water-based thickening rheological agent and the cosolvent under the stirring state of 500r/min, and dispersing for 10-15min at 1000r/min until no shrinkage cavity exists;
and 3, reducing the rotating speed to 500-600r/min, gradually adding the silane coupling agent, the hydrophilic solvent and the water, fully stirring for 10 minutes after the addition until the viscosity is stable, filtering through a 300-mesh filter cloth, discharging and packaging.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2002085992A1 (en) * | 2001-04-19 | 2002-10-31 | Commonwealth Scientific And Industrial Research Organisation | Coating composition capable of absorbing uv radiation |
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| WO2002085992A1 (en) * | 2001-04-19 | 2002-10-31 | Commonwealth Scientific And Industrial Research Organisation | Coating composition capable of absorbing uv radiation |
| JP2010106061A (en) * | 2008-10-28 | 2010-05-13 | Sony Corp | Weather-resistant hard-coat film, and ultraviolet-curable resin composition |
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