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Method for preparing fluorine-containing polyurethane coating and fluorine-containing polyurethane anticorrosion coating

A technology of polyurethane coatings and anti-corrosion coatings, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of fluorine-containing polyurethane coatings that are difficult to meet high-quality requirements, low cost performance of FPU anti-corrosion coatings, and high technical costs, and achieve low cost and easy operation , low-cost effect

Inactive Publication Date: 2017-06-16
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are difficulties in the preparation of the main raw materials required for the introduction of fluorine-containing chain segments into the hard segment. It is difficult to meet the high-quality requirements for fluorine-containing polyurethane coatings prepared by introducing fluorine-containing chain segments into acrylates. It is possible to prepare FPU by introducing fluorine-containing groups into the soft segment main chain. Overcome the defects in the technology of hard segment and acrylate introducing fluorine-containing segment
However, the technical cost of introducing fluorine-containing groups by using the soft segment main chain is relatively high, and generally has the characteristics of high fluorine and high performance, and the prepared FPU anti-corrosion coatings are relatively low in cost performance

Method used

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  • Method for preparing fluorine-containing polyurethane coating and fluorine-containing polyurethane anticorrosion coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Two-component solvent-based fluorine-containing polyurethane anti-corrosion coating, calculated by parts by weight, its raw material composition is:

[0025] 15 parts of fluorine-containing polyether polyol; 0.01 part of dibutyltin dilaurate;

[0026] 10 parts of 4,4-diphenylmethane diisocyanate; 5 parts of synergistic anti-corrosion filler; 20 parts of solvent system.

[0027] Among them, fluorine-containing polyether polyol and dibutyltin dilaurate are used as component A, and 4,4-diphenylmethane diisocyanate, synergistic anti-corrosion filler and solvent system are used as component B.

[0028] The fluorine-containing polyether polyol in component A is self-made by the inventor. The preparation method is to mix epichlorohydrin and tetrafluoropropanol in a molar ratio of 8:1, add NaOH to the system to adjust the pH to 10-13, and React at 65°C to 80°C to form fluorine-containing epoxides, then mix dichloromethane, tetrahydrofuran, ethylene glycol and boron trichloride...

Embodiment 2

[0040] Two-component solvent-based fluorine-containing polyurethane anti-corrosion coating, calculated by parts by weight, its raw material composition is:

[0041] 20 parts of fluorine-containing polyether polyol; 0.02 part of dibutyltin dilaurate;

[0042] 20 parts of 4,4-diphenylmethane diisocyanate; 15 parts of synergistic anti-corrosion filler; 30 parts of solvent system.

[0043] Among them, fluorine-containing polyether polyol and dibutyltin dilaurate are used as component A, and 4,4-diphenylmethane diisocyanate, synergistic anti-corrosion filler and solvent system are used as component B.

[0044]The fluorine-containing polyether polyol in component A is self-made by the inventor. The preparation method is to mix epichlorohydrin and tetrafluoropropanol in a molar ratio of 8:1, add NaOH to the system to adjust the pH to 10-13, and React at 65°C to 80°C to form fluorine-containing epoxides, then mix dichloromethane, tetrahydrofuran, ethylene glycol and boron trichloride...

Embodiment 3

[0056] Two-component solvent-based fluorine-containing polyurethane anti-corrosion coating, calculated by parts by weight, its raw material composition is:

[0057] 30 parts of fluorine-containing polyether polyol; 0.03 part of dibutyltin dilaurate;

[0058] 40 parts 4,4-diphenylmethane diisocyanate; 30 parts solvent system.

[0059] Among them, fluorine-containing polyether polyol and dibutyltin dilaurate are used as component A, and 4,4-diphenylmethane diisocyanate and solvent system are used as component B.

[0060] The fluorine-containing polyether polyol in component A is self-made by the inventor. The preparation method is to mix epichlorohydrin and tetrafluoropropanol in a molar ratio of 8:1, add NaOH to the system to adjust the pH to 10-13, and React at 65°C to 80°C to form fluorine-containing epoxides, then mix dichloromethane, tetrahydrofuran, ethylene glycol and boron trichloride etherate in a volume ratio of 40:48 to 64:0.3:1.1, and N 2 React under protective co...

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Abstract

The invention provides a method of preparing fluorinated polyurethane paint. The method is characterized by comprising the following steps: a step of preparing a component A, namely adding 15-60 parts of fluorinated polyether polyol and 0.01-0.03 part of dibutyltin dilaurate into a three-necked flask with a stirring rod in sequence, and stirring for 30 minutes to obtain the component A; a step of preparing a component B, namely adding 10-40 parts of 4,4-diphenyl methane diisocyanate and 0-30 parts of collaborative anticorrosive filler into 20-60 parts of a solvent system to stir and dissolve to obtain the component B; and a step of preparing fluorinated polyurethane anticorrosive paint, namely adding the component B into the three-necked flask filled with the component A, stirring for 8-10 minutes, grinding the mixed materials in the three-necked flask until fineness is 40-50 mu m after uniformly stirring, coating a metal sheet with the grinded mixed materials and curing for 24 hours to obtain the fluorinated polyurethane anticorrosive paint.

Description

technical field [0001] The invention relates to industrial chemicals, in particular to a method for preparing fluorine-containing polyurethane anticorrosion paint and the fluorine-containing polyurethane anticorrosion paint prepared by the method. Background technique [0002] Corrosion of materials refers to the damage or deterioration of materials due to environmental effects, which is an irreversible thermodynamic spontaneous process. The direct and indirect losses caused by material corrosion to the economies of countries around the world are staggering. According to statistics, more than 100 million tons of metals are scrapped due to corrosion every year in the world. Therefore, measures must be taken to reduce the loss caused by material corrosion. At present, the most effective, economical and common anti-corrosion method is to apply anti-corrosion coatings on the surface of materials. [0003] Anti-corrosion coatings are an indispensable coating in paints and coati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D5/08C08G18/50C08G65/28
CPCC08G18/5015C08G18/7671C08G65/2639C08K3/32C08K3/34C08K2003/327C09D5/082C09D175/08
Inventor 王霞胡娇娇李颖李玲玲李赞
Owner UNIV OF SHANGHAI FOR SCI & TECH