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High-adhesion fluorine-containing hydrophobic polyurethane transparent protective coating and preparation method and use method thereof

A high-adhesion, transparent protection technology, applied in the field of coatings, can solve the problems of easy penetration of water molecules, damage to the chemical and physical bonding between the coating and the substrate, and failure of coating adhesion, so as to resist the hot and humid environment and ensure the mechanical properties. Performance and environmental corrosion resistance, effect of improving adhesion

Inactive Publication Date: 2021-03-09
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that water molecules easily permeate between the coating and the substrate in harsh environments such as damp heat and high and low temperature shocks in the existing polyurethane coatings, destroying the chemical and physical bonding between the coating and the substrate, causing the coating In order to solve the problem of the failure of the adhesive force of the layer, a high-adhesive fluorine-containing hydrophobic polyurethane transparent protective coating and its preparation and use methods are provided

Method used

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  • High-adhesion fluorine-containing hydrophobic polyurethane transparent protective coating and preparation method and use method thereof
  • High-adhesion fluorine-containing hydrophobic polyurethane transparent protective coating and preparation method and use method thereof

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preparation example Construction

[0047] The present invention also provides a method for preparing a high-adhesion fluorine-containing hydrophobic polyurethane transparent protective coating, which comprises the following steps;

[0048] Step 1. Weigh polypolyol, chain extender, fluorine-containing alcohol, catalyst, adhesion promoter, leveling agent, wetting agent, sunscreen, antibacterial agent and solvent according to the composition and parts by weight, and mix uniformly to obtain Paint A agent;

[0049] Step 2. According to the composition and parts by weight, aliphatic diisocyanate is taken to obtain the coating agent B.

[0050] The present invention also provides a method for using a high-adhesion fluorine-containing hydrophobic polyurethane transparent protective coating. Pour coating agent A and coating agent B into a stirring reaction kettle, control the temperature at 24-26°C for 1.5-2.5 hours, and let stand After 20-30 minutes to remove air bubbles and cure after coating, a transparent protectiv...

Embodiment 1

[0054] The high-adhesion fluorine-containing hydrophobic polyurethane transparent protective coating is composed of a coating A agent and a coating B agent; the coating A agent is composed of 13.90 parts by weight of polyoxytetramethylene glycol (PTMG, molecular weight 650), 1,2,4- 8.34 parts by weight of butanetriol, 0.83 parts by weight of hexafluoroisopropanol, 0.13 parts by weight of stannous octoate, 2.18 parts by weight of bisphenol A epoxy resin, 0.03 parts by weight of polyether modified polydimethylsiloxane, 0.27 parts by weight of polyether modified polyorganosiloxane, 0.55 parts by weight of nano-titanium dioxide (particle size is 20nm), 0.56 parts by weight of LF-1194 antibacterial agent and 41.70 parts by weight of N, N dimethylformamide; coating agent B It is 31.51 parts by weight of isophorone diisocyanate. After the polyurethane transparent coating is cured, the polyurethane hard segment content is 73%.

[0055] The preparation method of the above-mentioned hi...

Embodiment 2

[0059] High-adhesion fluorine-containing hydrophobic polyurethane transparent protective coating is composed of coating A agent and coating B agent; coating A agent is composed of polyoxypropylene glycol (PPG molecular weight 400) 16.63 parts by weight, 1,2,4-butanetriol 9.98 Parts by weight, 1.00 parts by weight of hexafluoroisopropanol, 0.13 parts by weight of dibutyltin dilaurate, 2.18 parts by weight of bisphenol A epoxy resin, 0.03 parts by weight of polyether modified polydimethylsiloxane, polyether 0.27 parts by weight of modified polyorganosiloxane, 0.55 parts by weight of nano-titanium dioxide (particle diameter is 20nm), 0.67 parts by weight of LF-1194 antibacterial agent and 41.56 parts by weight of N,N dimethylformamide; 27.01 parts by weight of methylene diisocyanate (HDI). After the polyurethane transparent coating is cured, the polyurethane hard segment content is 83.51%.

[0060] The preparation method of the above-mentioned high-adhesion polyurethane transpar...

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Abstract

The invention relates to a high-adhesion fluorine-containing hydrophobic polyurethane transparent protective coating, and a preparation method and application thereof, belonging to the technical fieldof coatings. The problem that the adhesive force of an existing polyurethane coating fails in severe environments such as damp and hot environments and high and low temperature impact environments issolved. The protective coating comprises a coating agent A and a coating agent B, the coating agent A comprises, by weight, 10-15 parts of polyol, 6-15 parts of a chain extender, 0.5-2 part of fluorine-containing alcohol, 0.1-0.2 part of a catalyst, 1-2.5 parts of an adhesion promoter, 0.01-0.05 part of a leveling agent, 0.1-0.5 part of a wetting agent, 0.4-0.8 part of a sun-screening agent, 0.5-1 part of an antibacterial agent and 40-50 parts of a solvent, and the coating agent B comprises 20-40 parts of aliphatic diisocyanate. After the protective coating is cured, the content of a polyurethane hard segment is 70%-95%, and the protective coating has excellent adhesive force and good hydrophobicity and weather resistance and can keep good adhesive force in a humid and hot environment.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a high-adhesion fluorine-containing hydrophobic polyurethane transparent protective coating and its preparation and application methods. Background technique [0002] Polyurethane coating is a kind of coating with polyurethane resin as film-forming substance, which can be divided into one-component polyurethane coating and two-component polyurethane coating. One-component polyurethane coatings are easy to construct, but due to their short storage time and high requirements on curing conditions (such as moisture-curable one-component polyurethane coatings by weight, they are required to dry and form films in high humidity environments, which are only limited to rainy days and It is used in humid environment; closed one-component polyurethane coating needs to be cured under heat baking) and the curing time is long, so the application of this type of coating is not as w...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D175/04C09D175/06C09D5/33C09D5/32C09D5/14C09D5/16C09D5/08C09D7/65C08G18/75C08G18/73C08G18/66C08G18/48C08G18/44C08G18/58C08G18/32C08G18/28
CPCC08G18/2885C08G18/3206C08G18/4045C08G18/4277C08G18/44C08G18/4825C08G18/4854C08G18/58C08G18/664C08G18/6644C08G18/6677C08G18/73C08G18/755C08G18/758C08K2003/2241C08K2201/011C08L2201/08C08L2201/10C08L2205/025C08L2205/03C08L2205/035C09D5/004C09D5/08C09D5/14C09D5/1662C09D5/18C09D5/32C09D175/04C09D175/06C09D175/08C09D7/65C08L63/00C08L83/12C08K3/22
Inventor 刘霞赵晓礼杨小牛
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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