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CN-117586673-B - White color paste, water-based paint containing white color paste, and preparation method and application thereof

CN117586673BCN 117586673 BCN117586673 BCN 117586673BCN-117586673-B

Abstract

The invention discloses a white color paste, a water-based paint containing the white color paste and a preparation method thereof, which belong to the technical field of paint, the white color paste provided by the invention can obtain color paste with good dispersibility by selecting proper parts by mass of components, and is excellent in stability, and when the white color paste is further applied to the water-based paint, the white color paste has good compatibility with other components in the paint, especially polyurethane modified acrylic resin, so that the coating can be endowed with excellent properties of pollution resistance, scratch resistance, hardness, glossiness, adhesive force, aging resistance and the like. Meanwhile, the water-based paint provided by the invention is simple in application mode, can be formed into a coating with excellent performance by only one-time photo-curing, can be widely used for preparing the wood-like device, and improves the performance of the wood-like device. The preparation method of the white color paste and the water-based paint provided by the invention is simple to operate and is beneficial to actual production and application.

Inventors

  • WU ZEXIONG
  • PENG WEILI
  • HUANG JINQING
  • CHEN ZHUO
  • QI JUNSHENG
  • HU YAFEI

Assignees

  • 广州集泰化工股份有限公司

Dates

Publication Date
20260505
Application Date
20231204

Claims (9)

  1. 1. The water-based paint is characterized by comprising the following components in percentage by mass: 60-70% of polyurethane modified acrylic resin, 2-5% of photoinitiator, 0.5-0.7% of flatting agent, 2% of pH regulator, 2-5% of cosolvent, 0.5-0.6% of thickener, 15-20% of white color paste, 3-4% of flatting powder and the balance of water; The polyurethane modified acrylic resin is tetrafunctional polyurethane modified acrylic resin or hexafunctional polyurethane modified acrylic resin; The white color paste comprises, by mass, 0.5-1 part of polyvinylpyrrolidone, 0.6-2 parts of a wetting agent, 1-3 parts of a cosolvent, 0.5-1 part of a coupling agent, 0.2-0.4 part of a defoaming agent, 60-80 parts of titanium dioxide, 1-2 parts of an anti-settling agent and 13-20 parts of water; The average molecular weight of the polyvinylpyrrolidone is 3.8-4.4 ten thousand.
  2. 2. The water-based paint according to claim 1, wherein the mass ratio of polyvinylpyrrolidone to titanium dioxide is (0.5-0.8) (60-70).
  3. 3. The aqueous coating of claim 1, wherein at least one of the following (a) - (h): (a) The wetting agent comprises at least one of organic silicon acrylic ester, polyether modified polysiloxane, ethoxylated unsaturated fatty acid monoethanolamide and polyphosphate; (b) The cosolvent comprises at least one of ethylene glycol, diethylene glycol, ethylene glycol butyl ether and propylene glycol methyl ether; (c) The coupling agent comprises at least one of a siloxane coupling agent and a titanate coupling agent; (d) The defoamer comprises at least one of nonionic acetylenes, polyether modified polysiloxane, mineral oil emulsion and acrylic emulsion; (e) The anti-settling agent comprises at least one of organic bentonite, polyamide wax and titanate coupling agent; (f) The titanium dioxide comprises nano titanium dioxide.
  4. 4. The aqueous coating of claim 1, wherein the titanium dioxide comprises at least one of rutile titanium dioxide and anatase titanium dioxide.
  5. 5. The water-based paint according to claim 1, wherein the average particle size of the white paste is less than or equal to 30 μm.
  6. 6. The water-based paint according to claim 1, wherein the preparation method of the white color paste comprises the following steps: (1) Mixing polyvinylpyrrolidone with part of water for dispersion, and then heating for dissolution to obtain polyvinylpyrrolidone aqueous solution; (2) Sequentially adding a wetting agent, a cosolvent, a coupling agent, a defoaming agent and titanium dioxide into the polyvinylpyrrolidone aqueous solution, and stirring and dispersing at room temperature; (3) Adding an anti-settling agent and the rest water, and continuously stirring and dispersing; (4) Grinding after the dispersion is finished to obtain white color paste.
  7. 7. The water-based paint according to claim 1, wherein the mass ratio of the polyurethane modified acrylic resin to the white color paste is 60 (10-30).
  8. 8. The aqueous coating of claim 1, wherein at least one of the following (g) - (l): (g) The photoinitiator comprises at least one of 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1- (4-methylthiophenyl) -2-morpholinyl-1-acetone, 2-hydroxy-2-methyl propiophenone and phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide; (h) The leveling agent comprises at least one of an organic silicon surfactant and a fluorine-containing surfactant polymer; (i) The pH regulator comprises at least one of triethanolamine, methyldiethanolamine, AMP-95 and ethanolamine phosphate; (j) The cosolvent comprises at least one of propylene glycol methyl ether, dipropylene glycol methyl ether and white water preventing water; (k) The thickener comprises at least one of carboxymethyl cellulose, hydroxyethyl cellulose, guar gum, polyacrylamide and polyethylene wax; (l) The extinction powder comprises at least one of superfine silicon dioxide, talcum powder, calcium stearate and polyethylene wax.
  9. 9. Use of the aqueous coating according to any one of claims 1-8 for the preparation of a woodware-like device.

Description

White color paste, water-based paint containing white color paste, and preparation method and application thereof Technical Field The invention belongs to the technical field of coatings, and particularly relates to a white color paste, a water-based coating containing the white color paste, and a preparation method and application thereof. Background The wood lacquer is one of common paint and has wide application in China. However, with the concept of environmental protection in depth, the furniture market is currently developing into imitation wood. At present, the market utilizes plastics to manufacture a wood-like device to gradually replace the use of woodware in furniture, so that the protection of forest resources is realized. On the other hand, the requirement of consumers, including decoration requirement, durability requirement, environmental protection requirement and the like, cannot be met by using the wood-like device alone, so that the wood-like paint is required to achieve more excellent performance by coating the corresponding coating as well as the rich performance of the wood-like device. Therefore, the development of new woodenware-like paint is an urgent need for popularizing woodenware furniture at present. Photo-curable coatings, particularly uv-curable coatings, are a development direction strongly advocated in recent years. The method has the advantages of high curing efficiency, energy conservation, less pollution and the like. However, most of the existing ultraviolet light curing coatings are still traditional solvent type coatings, are not friendly to coating construction personnel and environment, and meanwhile, the solvent type ultraviolet light curing coatings have large shrinkage after curing, so that coating defects are easily caused. Therefore, the water-based ultraviolet curing coating becomes a new direction for developing the coating at present. Titanium dioxide is used as a filler commonly used in paint, has good colorability, good scratch resistance and certain cleaning performance, and is widely applied to white color paste at present. Titanium dioxide color paste is also commonly used in wood lacquer. The preparation of an aqueous wood lacquer titanium white slurry is mentioned as patent CN 103614005B. However, the titanium white paste for the water-based paint of the wood-like paint is not yet involved at present, so that the invention develops the matched titanium dioxide white paste for the water-based paint of the wood-like paint, and further improves the performance of the water-based paint of the wood-like paint. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a white color paste which has excellent stability and good compatibility with resin, so that the obtained coating has high hardness, excellent scratch resistance and pollution resistance when the obtained water-based coating is used on an imitation wood device, a water-based coating containing the white color paste, and a preparation method and application thereof. In order to achieve the above object, in a first aspect of the present invention, there is provided a white paste comprising the following components in parts by mass: 0.1-1 part of polyvinylpyrrolidone, 0.5-2 parts of wetting agent, 1-3 parts of cosolvent, 0.4-1 part of coupling agent, 0.1-0.4 part of defoamer, 40-80 parts of titanium dioxide, 0.5-2 parts of anti-settling agent and 10-20 parts of water; the average molecular weight of the polyvinylpyrrolidone is more than or equal to 2.4 ten thousand. According to the white color paste, the components with proper mass parts and the polyvinylpyrrolidone with specific average molecular weight are selected, so that the titanium dioxide has hydrophilicity, the color paste with good dispersibility can be obtained, the stability of the color paste is excellent, the defects of coarsening, layering, skinning and the like do not occur in the storage process, and meanwhile, when the white color paste is subsequently applied to the water-based paint, the white color paste has good compatibility with other components in the paint, particularly polyurethane modified acrylic resin, so that the coating has excellent properties of pollution resistance, scratch resistance, hardness, glossiness, adhesive force, ageing resistance and the like. As a preferred embodiment of the white color paste, the mass ratio of the polyvinylpyrrolidone to the titanium dioxide is (0.5-0.8) (60-70). According to the invention, the research shows that the mass ratio of polyvinylpyrrolidone to titanium dioxide in the white color paste can influence the comprehensive performance of the product, and when the mass ratio of polyvinylpyrrolidone to titanium dioxide is in the range, the obtained white color paste has excellent stability and the obtained coating has excellent comprehensive performance when being applied to the subsequent preparation of water-based paint. As a preferred emb