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CN-122011937-A - High-adhesion automotive interior surface treatment agent and preparation method thereof

CN122011937ACN 122011937 ACN122011937 ACN 122011937ACN-122011937-A

Abstract

The invention relates to the technical field of preparation of polysiloxane surface treatment agents, and discloses a high-adhesion automotive interior surface treatment agent and a preparation method thereof, wherein the high-adhesion automotive interior surface treatment agent comprises, by mass, 80-100 parts of acrylic acid modified polysiloxane resin, 5-10 parts of polydimethylsiloxane, 5-8 parts of reinforcing filler, 2-5 parts of aminosilane coupling agent, 0.1-0.5 part of leveling agent and 1-2 parts of thickener. The prepared automotive interior surface treatment agent has higher adhesive force, is sprayed on the surface of the automotive interior, can improve the wear resistance of the automotive interior, and in addition, the added reinforcing filler can be uniformly dispersed in a polysiloxane surfactant system, so that the adhesive force and wear resistance of the polysiloxane surfactant are improved.

Inventors

  • LUO BIN
  • He Dinggui
  • HE ZOU
  • ZHANG JINHAO
  • DUAN MEIJI
  • XIAO XIANG

Assignees

  • 重庆韩拓科技有限公司

Dates

Publication Date
20260512
Application Date
20260313

Claims (10)

  1. 1. The high-adhesion automotive interior surface treatment agent is characterized by comprising, by mass, 80-100 parts of acrylic modified polysiloxane resin, 5-10 parts of polydimethylsiloxane, 5-8 parts of reinforcing filler, 2-5 parts of aminosilane coupling agent, 0.1-0.5 part of leveling agent and 1-2 parts of thickener; the reinforcing filler is obtained by mixing and reacting a silane coupling agent surface treated composite potassium titanate whisker and carboxyl-polyethylene glycol-carboxyl and hydroxyl end-capped polydimethylsiloxane; The composite potassium titanate whisker is obtained by synthesizing a porous carbon layer from the surface of the potassium titanate whisker, and then mixing and reacting with zirconium oxychloride octahydrate and ammonia water.
  2. 2. The high adhesion automotive interior surface treatment according to claim 1, wherein the reinforcing filler is prepared by: A1. Uniformly mixing potassium titanate whisker, tannic acid and ethanol, adding glucose, stirring, taking out, drying, placing in a tube furnace, adding potassium hydroxide solution, introducing nitrogen, carbonizing at 800-900 ℃ for 4-5h, cooling to room temperature, taking out, washing, and drying to obtain modified potassium titanate whisker; A2. Uniformly mixing zirconium oxychloride octahydrate, modified potassium titanate whisker and deionized water, adding ammonia water, glycine and potassium chloride, uniformly stirring, placing in a reaction kettle, performing hydrothermal reaction for 20-22h at 170-190 ℃, cooling to room temperature, filtering, washing and drying to obtain composite potassium titanate whisker; A3. Uniformly mixing the composite potassium titanate whisker, ethanol and deionized water, adding a silane coupling agent, stirring for reaction, cooling to room temperature, filtering, washing and drying to obtain the epoxidized composite potassium titanate whisker; A4. Adding the epoxidized composite potassium titanate whisker into ethanol, uniformly stirring, adding hydrochloric acid, stirring, filtering, and collecting solids; Mixing hydroxyl-terminated polydimethylsiloxane, carboxyl-polyethylene glycol-carboxyl and toluene, stirring uniformly, adding p-toluenesulfonic acid, introducing nitrogen, stirring at 100-110 ℃ for reaction for 3-4h, adding solid, continuing stirring for reaction for 1-2h, cooling, adding triethylamine to neutralize p-toluenesulfonic acid, heating, and decompressing to remove toluene to obtain the reinforced filler.
  3. 3. The high-adhesion automotive interior surface treatment agent according to claim 2, wherein in the step A1, the mass ratio of the potassium titanate whisker, tannic acid, ethanol, glucose and potassium hydroxide solution is (4-5): 0.5-1): 180-220: (2.5-3): 1.5-2.
  4. 4. The high-adhesion automotive interior surface treatment agent according to claim 2, wherein in the step A2, the mass ratio of the zirconium oxychloride octahydrate, the modified potassium titanate whisker, the deionized water, the ammonia water, the glycine and the potassium chloride is (2-2.4): (4.5-5): (150-170): (1.5-2): (0.3-0.5): (0.7-0.9).
  5. 5. The high-adhesion automotive interior surface treatment agent according to claim 2, wherein in the step A3, the mass ratio of the composite potassium titanate whisker to the ethanol to the deionized water to the silane coupling agent is (4-4.5): (120-130): (40-50): (1-1.2).
  6. 6. The high-adhesion automotive interior surface treatment agent according to claim 2, wherein in the step A4, the mass ratio of the epoxidized composite potassium titanate whisker to ethanol to hydrochloric acid is (4-4.5): 20-30): 1-2; In the step A4, the mass ratio of the hydroxyl-terminated polydimethylsiloxane, the carboxyl-polyethylene glycol-carboxyl, the toluene, the p-toluenesulfonic acid and the solid is (9-15): 1-1.5): 20-25): 0.3-0.8): 4-4.2.
  7. 7. The high-adhesion automotive interior surface treatment agent according to claim 1, wherein the aminosilane coupling agent is selected from any one of γ -aminopropyl triethoxysilane, N- β (aminoethyl) - γ -aminopropyl trimethoxysilane, N- β (aminoethyl) - γ -aminopropyl triethoxysilane.
  8. 8. The high-adhesion automotive interior surface treatment agent according to claim 1, wherein the leveling agent is any one selected from the group consisting of leveling agent BYK-320, leveling agent BYK-354 and leveling agent FL 2028.
  9. 9. The high-adhesion automotive interior surface treatment agent according to claim 1, wherein the thickener is any one selected from the group consisting of methylcellulose, hydroxypropyl methylcellulose, sodium carboxymethylcellulose, and hydroxyethyl cellulose.
  10. 10. The method for preparing a high-adhesion automotive interior surface treatment agent according to any one of claims 1 to 9, comprising the steps of: Mixing the acrylic modified polysiloxane resin and the polydimethylsiloxane, stirring for 10-15min at 800-1000r/min, adding the reinforcing filler, the aminosilane coupling agent, the leveling agent and the thickening agent, and stirring for 15-20min at 50-60 ℃ and 2500-3000r/min to obtain the automotive interior surface treatment agent.

Description

High-adhesion automotive interior surface treatment agent and preparation method thereof Technical Field The invention relates to the technical field of preparation of polysiloxane surface treatment agents, in particular to an automotive interior surface treatment agent with high adhesive force and a preparation method thereof. Background Automotive interiors are generally made of polypropylene, acrylonitrile-butadiene-styrene copolymer, polycarbonate, thermoplastic polyolefin and other materials, and although the materials have good mechanical properties and processability, the surfaces of the materials often lack good touch feeling and are easy to accumulate dust, and currently, automotive interiors are mostly cleaned, glazed and protected by adopting automotive interior surface treatment agents, and the surface properties of the automotive interiors are improved by removing stains and covering bright layers. Surface properties of interior parts are often improved by spraying a surface treatment agent, and polysiloxane is widely applied to such treatment agent due to its unique flexibility, high and low temperature resistance, weather resistance and ability to provide excellent smooth hand feeling, however, the polysiloxane surface treatment agent has a large si—o bond content, has an inorganic hybridization characteristic, and a film forming material is close to an inorganic system, and is easily peeled off from an automotive interior, resulting in poor adhesion. Disclosure of Invention The invention provides a high-adhesion automotive interior surface treatment agent and a preparation method thereof, and solves the problems that a polysiloxane surface treatment agent has inorganic hybridization property, a film forming material is close to an inorganic system and is easy to peel off from an automotive interior, so that the adhesion is poor. The technical scheme of the invention is as follows: The automotive interior surface treating agent with high adhesive force comprises, by mass, 80-100 parts of acrylic modified polysiloxane resin, 5-10 parts of polydimethylsiloxane, 5-8 parts of reinforcing filler, 2-5 parts of aminosilane coupling agent, 0.1-0.5 part of leveling agent and 1-2 parts of thickener; Wherein, the reinforcing filler is obtained by mixing and reacting the composite potassium titanate whisker treated by the surface of a silane coupling agent with carboxyl-polyethylene glycol-carboxyl and hydroxyl-terminated polydimethylsiloxane; The composite potassium titanate whisker is obtained by synthesizing a porous carbon layer from the surface of the potassium titanate whisker, and then mixing the porous carbon layer with zirconium oxychloride octahydrate and ammonia water for reaction; the preparation method of the high-adhesion automotive interior surface treatment agent comprises the following preparation steps: Mixing the acrylic modified polysiloxane resin and the polydimethylsiloxane, stirring for 10-15min at 800-1000r/min, adding the reinforcing filler, the aminosilane coupling agent, the leveling agent and the thickening agent, and stirring for 15-20min at 50-60 ℃ and 2500-3000r/min to obtain the automotive interior surface treatment agent. Further, the temperature of the first zone of the twin-screw extruder is 125-135 ℃, the temperature of the second zone is 145-155 ℃, the temperature of the third zone is 160-170 ℃, the temperature of the die head is 165-175 ℃, and the rotating speed of the screw is 30-40rpm. Further, the aminosilane coupling agent is selected from any one of gamma-aminopropyl triethoxysilane, N-beta (aminoethyl) -gamma-aminopropyl trimethoxysilane and N-beta (aminoethyl) -gamma-aminopropyl triethoxysilane. Further, the leveling agent is selected from any one of leveling agent BYK-320, leveling agent BYK-354 and leveling agent FL 2028. Further, the thickener is selected from any one of methylcellulose, hydroxypropyl methylcellulose, sodium carboxymethylcellulose, and hydroxyethyl cellulose. Further, the reinforcing filler is specifically prepared by the following steps: A1. Uniformly mixing potassium titanate whisker, tannic acid and ethanol, adding glucose, stirring, taking out, drying, placing in a tube furnace, adding potassium hydroxide solution, introducing nitrogen, carbonizing at 800-900 ℃ for 4-5h, cooling to room temperature, taking out, washing, and drying to obtain modified potassium titanate whisker; A2. Uniformly mixing zirconium oxychloride octahydrate, modified potassium titanate whisker and deionized water, adding ammonia water, glycine and potassium chloride, uniformly stirring, placing in a reaction kettle, performing hydrothermal reaction for 20-22h at 170-190 ℃, cooling to room temperature, filtering, washing and drying to obtain composite potassium titanate whisker; A3. Uniformly mixing the composite potassium titanate whisker, ethanol and deionized water, adding a silane coupling agent, stirring for reaction, cooling to room temperature, filtering, w