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CN-121975383-A - Self-repairing interior wall coating slurry and preparation method thereof

CN121975383ACN 121975383 ACN121975383 ACN 121975383ACN-121975383-A

Abstract

The invention relates to the technical field of self-repairing coating, and discloses self-repairing inner wall coating slurry and a preparation method thereof, wherein the raw materials of the wall coating slurry comprise, by weight, 50-60 parts of acrylic emulsion, 2-10 parts of nanocellulose, 5-10 parts of silica sol, 0.5-2 parts of alkyl silicone oil, 1-3 parts of silane coupling agent, a first emulsifier and water, the glass transition temperature of acrylic emulsion is-20-10 ℃, the raw materials of the acrylic emulsion comprise 40-60 parts of butyl acrylate, 20-30 parts of methyl methacrylate, 15-25 parts of hydroxyethyl acrylate, 5-10 parts of methoxypolyethylene glycol acrylate, 0.3-0.6 part of initiator, a second emulsifier and water, and the molecular weight of methoxypolyethylene glycol acrylate is 200-1000. The wall clothing has the self-repairing capability in indoor household environment by adopting the acrylic resin with low glass transition temperature as the flexible repairing matrix and constructing an inorganic-organic hybrid network by matching with silica sol.

Inventors

  • Zheng Xionglin
  • WANG GANGGANG
  • WANG TAIHUA
  • YUAN HONG
  • YANG RUIFANG

Assignees

  • 佛山石湾鹰牌陶瓷有限公司

Dates

Publication Date
20260505
Application Date
20260122

Claims (10)

  1. 1. The self-repairing inner wall coating slurry is characterized in that the raw materials of the wall coating slurry comprise 50-60 parts by weight of acrylic emulsion, 2-10 parts by weight of nanocellulose, 5-10 parts by weight of silica sol, 0.5-2 parts by weight of alkyl silicone oil, 1-3 parts by weight of silane coupling agent, a first emulsifier and water; The glass transition temperature of the acrylic emulsion is-20-10 ℃, the raw materials of the acrylic emulsion comprise 40-60 parts of butyl acrylate, 20-30 parts of methyl methacrylate, 15-25 parts of hydroxyethyl acrylate, 5-10 parts of methoxy polyethylene glycol acrylate, 0.3-0.6 part of initiator, a second emulsifier and water, and the molecular weight of the methoxy polyethylene glycol acrylate is 200-1000.
  2. 2. A self-repairing interior wall coating slurry according to claim 1, further comprising 1-3 parts by weight of 0.1-2mm length purified cotton or vegetable fibers.
  3. 3. The self-repairing interior wall coating slurry of claim 1, wherein the first emulsifier is nonionic polyurethane associative thickener HEUR in an amount of 0.5-2 parts by weight.
  4. 4. The self-repairing interior wall coating slurry of claim 1, wherein the first emulsifier is AEO-9 and the dosage is 0.15-0.5 weight parts.
  5. 5. The self-repairing interior wall coating slurry of claim 1, wherein the second emulsifier is basf XP-90 and is used in an amount of 0.5-1.5 parts by weight.
  6. 6. The self-repairing interior wall coating slurry of claim 1, further comprising a pH regulator, wherein the pH of the acrylic emulsion is 8.5-9.5.
  7. 7. The self-repairing interior wall coating slurry of claim 1, wherein the initiator is ammonium persulfate or potassium persulfate.
  8. 8. The self-repairing interior wall coating slurry according to claim 1, further comprising functional fillers and pigments in an amount of 1-30 parts.
  9. 9. A method for preparing a self-repairing interior wall coating slurry, characterized by comprising the steps of: adding the acrylic emulsion and the first emulsifier into a disperser according to a proportion, and dispersing for 5-10 minutes; adding silica sol, alkyl silicone oil and a silane coupling agent, and dispersing for 15-30 minutes; Finally adding nanocellulose and nonionic polyurethane associative thickener HEUR, and dispersing refined cotton fiber or plant fiber or other functional fillers and pigments with the length of 0.1-2mm for 5-10 minutes to obtain the wall coating slurry.
  10. 10. The method for preparing the acrylic emulsion according to claim 9, wherein the method for preparing the acrylic emulsion comprises the following steps: Pre-emulsifying, namely adding butyl acrylate, methyl methacrylate, hydroxyethyl acrylate and methoxy polyethylene glycol acrylate monomers into a disperser, adding a second emulsifier and water, and dispersing for 15-30 minutes at high speed to obtain pre-emulsifying monomers; Preparing seed emulsion, namely adding 3-5% of pre-emulsified monomer into a reaction kettle, stirring and heating to 80 ℃, and adding all initiator to react for 20-40 minutes to obtain seed emulsion; and (3) preparing the acrylic emulsion, namely slowly and uniformly dropwise adding the residual pre-emulsified monomer into the seed emulsion within 1-3 hours while maintaining stirring and temperature, and continuously reacting for 0.5-1 hour after the dropwise adding is completed to obtain the acrylic emulsion.

Description

Self-repairing interior wall coating slurry and preparation method thereof Technical Field The invention relates to the technical field of self-repairing coating, in particular to self-repairing inner wall coating slurry and a preparation method thereof. Background At present, the interior decoration wall surfaces are various in types, and comprise emulsion paint, artistic paint, diatom ooze, various fabric fiber wall clothes and the like, and the materials provide rich visual performance and multiple decoration effects for the interior space. However, in the daily use process, the wall surface is inevitably subject to physical collision such as furniture handling, human touch or scraping by a sharp object, and the like, so that scratches, damages or depressions are generated on the wall surface. Because most decorative materials lack self-repairing capability, the damage not only damages the whole aesthetic feeling of the wall surface, but also can become a source of dirt accumulation and mold growth, and greatly influences the long-term use effect. Meanwhile, as a new research hot spot, the self-repairing coating technology aims at recovering the damaged coating, and at present, a plurality of self-repairing coating technologies can realize self-repairing when the coating is slightly damaged. However, the existing self-repairing technical scheme has obvious using barriers in practical application. On the one hand, many self-healing coatings based on supramolecular interactions or microcapsule technology require specific external stimuli to activate, such as uv irradiation, high temperature heating or the use of specific chemical triggers. On the other hand, these techniques often require accurate control conditions in a laboratory, and for the built indoor interior wall environment of a home, both large-area heating and high-intensity ultraviolet irradiation, do not have the feasibility of practical operation by a user, so that the techniques are difficult to be popularized on a large scale as wall covering materials for daily household use. In view of the limitations of the prior art, there is a need to develop a self-repairing wall covering that can be used in indoor environments without relying on manual intervention and without changing the use habits of users. Disclosure of Invention Aiming at the defects, the invention aims to provide self-repairing interior wall coating slurry and a preparation method thereof, which solve the problems that the traditional wall coating cannot realize self-repairing and the traditional self-repairing coating is difficult to realize self-repairing in daily household indoor environments. To achieve the purpose, the invention adopts the following technical scheme: the self-repairing inner wall coating slurry comprises, by weight, 50-60 parts of acrylic emulsion, 2-10 parts of nanocellulose, 5-10 parts of silica sol, 0.5-2 parts of alkyl silicone oil, 1-3 parts of silane coupling agent, a first emulsifier and water; The glass transition temperature of the acrylic emulsion is-20-10 ℃, the raw materials of the acrylic emulsion comprise 40-60 parts of butyl acrylate, 20-30 parts of methyl methacrylate, 15-25 parts of hydroxyethyl acrylate, 5-10 parts of methoxy polyethylene glycol acrylate, 0.3-0.6 part of initiator, a second emulsifier and water, and the molecular weight of the methoxy polyethylene glycol acrylate is 200-1000. Preferably, the cotton fiber or plant fiber with the length of 0.1-2mm is further contained in an amount of 1-3 parts by weight. Preferably, the first emulsifier is nonionic polyurethane associative thickener HEUR, and the dosage is 0.5-2 parts by weight. Preferably, the first emulsifier is AEO-9 and the amount is 0.15-0.5 weight parts. Preferably, the second emulsifier adopts Basoff XP-90, and the dosage is 0.5-1.5 parts by weight. Preferably, the emulsion also comprises a pH regulator, namely, the American Dow AMP-95, wherein the pH value of the acrylic emulsion is 8.5-9.5. Preferably, the initiator is ammonium persulfate or potassium persulfate. Preferably, the paint also comprises a functional filler and a pigment, and the dosage is 1-30 parts. A preparation method of self-repairing inner wall coating slurry is used for preparing the wall coating slurry and comprises the following steps: adding the acrylic emulsion and the first emulsifier into a disperser according to a proportion, and dispersing for 5-10 minutes; adding silica sol, alkyl silicone oil and a silane coupling agent, and dispersing for 15-30 minutes; Finally adding nanocellulose and nonionic polyurethane associative thickener HEUR, and dispersing refined cotton fiber or plant fiber or other functional fillers and pigments with the length of 0.1-2mm for 5-10 minutes to obtain the wall coating slurry. Preferably, the preparation method of the acrylic emulsion comprises the following steps: Pre-emulsifying, namely adding butyl acrylate, methyl methacrylate, hydroxyethyl acrylate and me