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CN-121991541-A - Waterborne polyurethane antistatic mortar floor coating and preparation method thereof

CN121991541ACN 121991541 ACN121991541 ACN 121991541ACN-121991541-A

Abstract

The invention discloses an aqueous polyurethane antistatic mortar floor coating and a preparation method thereof, belonging to the technical field of floor coatings. Mixing deionized water, a dispersing agent, water-based castor oil modified polyol resin and a defoaming agent to obtain a component A, mixing a curing agent and a diluting agent to obtain a component B, mixing cement, quartz sand, calcium hydroxide, a water reducing agent and a dry powder defoaming agent to obtain a component C, mixing a plasticizer, a conductive filler, an antistatic additive and color paste to obtain a component D, sequentially mixing the component A, the component D, the component B and the component C to obtain the water-based polyurethane antistatic mortar floor coating, dispersing polydopamine coated halloysite powder in the deionized water, adding sodium alginate and tin doped zinc oxide coated titanium dioxide conductive particles, stirring uniformly, adding a crosslinking agent to carry out crosslinking reaction, and carrying out vacuum freeze drying to obtain the water-based polyurethane mortar floor coating, wherein the antistatic additive and the conductive filler are added to synergistically improve the antistatic performance of the water-based polyurethane mortar floor coating.

Inventors

  • XIA YUQIU
  • LIAO XIAOHUA
  • ZHANG YANWEI
  • WANG JINGJING
  • ZHU JIANJUN

Assignees

  • 杭州京越建材科技有限公司

Dates

Publication Date
20260508
Application Date
20260324

Claims (8)

  1. 1. The preparation method of the waterborne polyurethane antistatic mortar floor coating is characterized by comprising the following steps of: s1, uniformly mixing deionized water, a dispersing agent, aqueous castor oil modified polyol resin and a defoaming agent to obtain a component A; S2, uniformly mixing a curing agent and a diluent to obtain a component B; S3, uniformly mixing cement, quartz sand, calcium hydroxide, a water reducing agent and a dry powder defoaming agent to obtain a component C; s4, uniformly mixing the plasticizer, the conductive filler, the antistatic auxiliary agent and the color paste to obtain a component D; S5, mixing the component A and the component D, uniformly stirring, adding the component B, uniformly stirring, adding the component C, and uniformly stirring to obtain the waterborne polyurethane antistatic mortar floor coating; The antistatic auxiliary agent is prepared by dispersing polydopamine coated halloysite powder in deionized water, adding sodium alginate and tin-doped zinc oxide coated titanium dioxide conductive particles, uniformly stirring, adding a cross-linking agent for cross-linking reaction, and vacuum freeze-drying.
  2. 2. The preparation method of the waterborne polyurethane antistatic mortar floor coating according to claim 1, wherein in the step S1, the mass ratio of deionized water to dispersing agent to waterborne castor oil modified polyol resin to defoamer is 19.6-30.8:1-2:68-78:0.2-0.4.
  3. 3. The preparation method of the waterborne polyurethane antistatic mortar floor coating according to claim 1, wherein in the step S2, the mass ratio of the curing agent to the diluent is 5:1.
  4. 4. The preparation method of the waterborne polyurethane antistatic mortar floor coating according to claim 1, wherein in the step S3, the mass ratio of the cement to the quartz sand to the calcium hydroxide to the water reducing agent to the dry powder defoamer is 20-30:40-60:5-9:0.4-0.6:1-2.
  5. 5. The preparation method of the waterborne polyurethane antistatic mortar floor coating according to claim 1, wherein in the step S4, the mass ratio of the plasticizer to the conductive filler to the antistatic auxiliary agent to the color paste is 20-30:8-10:0.2-0.3:50-60.
  6. 6. The preparation method of the waterborne polyurethane antistatic mortar floor coating according to claim 1, wherein in the step S5, the mass ratio of the component A to the component B to the component C to the component D is 3-5:4-5:10-15:0.7-0.8.
  7. 7. The preparation method of the aqueous polyurethane antistatic mortar floor coating is characterized in that the proportioning ratio of polydopamine coated halloysite powder, deionized water, sodium alginate, tin-doped zinc oxide coated titanium dioxide conductive particles and a cross-linking agent is 0.4-0.8g:50mL:0.2-0.3g:0.1-0.3g:0.2-0.4mL, and the cross-linking agent is boric acid solution with the concentration of 0.05 mol/L.
  8. 8. An aqueous polyurethane antistatic mortar floor coating prepared by the preparation method of any one of claims 1 to 7.

Description

Waterborne polyurethane antistatic mortar floor coating and preparation method thereof Technical Field The invention belongs to the technical field of floor coatings, and particularly relates to an aqueous polyurethane antistatic mortar floor coating and a preparation method thereof. Background With the rapid development of high and new technology industries such as electronic information, precision manufacturing, semiconductors, biological medicine and the like, electrostatic hazard has become a key factor affecting product quality and production safety. According to statistics, the annual economic loss of electronic products in China caused by improper electrostatic protection reaches more than hundreds of millions of yuan, and electrostatic discharge can lead to breakdown damage of microelectronic components and malfunction of precise instruments, and can also cause safety accidents in flammable and explosive environments. Under the background, the antistatic floor coating with the high-efficiency electrostatic leakage function is widely applied to places such as electronic workshops, clean workshops and laboratories, and the performance of the antistatic floor coating is directly related to the stability of the production process and the reliability of products. The traditional antistatic terrace mostly adopts a solvent polyurethane or epoxy resin system, and has certain conductivity and mechanical strength, but has the problems of high emission of volatile organic compounds, residual toxic and harmful substances and the like, and seriously does not meet the national environment-friendly policy requirements and indoor air quality standards. In contrast, the water-based polyurethane coating takes water as a dispersion medium, has the advantages of no toxicity, no pollution, safe construction, excellent weather resistance and the like, simultaneously maintains the core performances of high adhesive force, flexibility and the like of solvent-based polyurethane, and gradually becomes the main development direction of floor coatings. However, when the waterborne polyurethane is combined with an antistatic function and a mortar reinforcing system, the conventional waterborne polyurethane antistatic coating mainly builds a conductive network by adding conductive fillers such as carbon black, metal powder and graphene, but the conductive network can be formed by the fillers with high addition amount, so that the viscosity of the coating is increased, the workability is reduced, the conductive network is discontinuous, and the antistatic performance is poor. In summary, the current market urgently needs an aqueous polyurethane antistatic mortar floor coating with environmental protection and good antistatic performance. Disclosure of Invention The invention aims to provide an aqueous polyurethane antistatic mortar floor coating and a preparation method thereof, which are used for improving the antistatic performance of the aqueous polyurethane mortar floor coating. The aim of the invention can be achieved by the following technical scheme: an aqueous polyurethane antistatic mortar floor coating and a preparation method thereof comprise the following steps: s1, uniformly mixing deionized water, a dispersing agent, aqueous castor oil modified polyol resin and a defoaming agent to obtain a component A; S2, uniformly mixing a curing agent and a diluent to obtain a component B; S3, uniformly mixing cement, quartz sand, calcium hydroxide, a water reducing agent and a dry powder defoaming agent to obtain a component C; s4, uniformly mixing the plasticizer, the conductive filler, the antistatic auxiliary agent and the color paste to obtain a component D; S5, mixing the component A and the component D, uniformly stirring, adding the component B, uniformly stirring, adding the component C, and uniformly stirring to obtain the waterborne polyurethane antistatic mortar floor coating; The antistatic auxiliary agent is prepared by dispersing polydopamine coated halloysite powder in deionized water, adding sodium alginate and tin-doped zinc oxide coated titanium dioxide conductive particles, uniformly stirring, adding a cross-linking agent for cross-linking reaction, and vacuum freeze-drying. As a preferable technical scheme of the invention, in the step S1, the mass ratio of the deionized water, the dispersing agent, the water-based castor oil modified polyol resin and the defoamer is 19.6-30.8:1-2:68-78:0.2-0.4. In a preferred embodiment of the present invention, in step S2, the mass ratio of the curing agent to the diluent is 5:1. As a preferable technical scheme of the invention, in the step S3, the mass ratio of the cement, the quartz sand, the calcium hydroxide, the water reducer and the dry powder defoamer is 20-30:40-60:5-9:0.4-0.6:1-2. As a preferable technical scheme of the invention, in the step S4, the mass ratio of the plasticizer, the conductive filler, the antistatic auxiliary agent and the color paste is 20-30: