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Boiling-resistant paint and preparation method thereof, boiling-resistant coating and preparation method thereof, and application of boiling-resistant coating

A water-resistant, coating technology, applied in coatings, anti-corrosion coatings, etc., can solve problems such as cracking and insufficient adhesion, and achieve the effects of improving adhesion, crack resistance, and compactness

Inactive Publication Date: 2020-03-31
中昊北方涂料工业研究设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of boil-resistant coating, coating, preparation method and application for existing coating coatings that have insufficient adhesion and cracking during use or in some harsh environmental tests. The coating formed on the surface of polycarbonate has the characteristics of wear resistance, water boiling resistance, high and low temperature impact resistance, heat and humidity resistance, and salt spray resistance. The present invention improves the compactness of the coating by increasing the crosslinking density of the coating to meet The adhesion performance of the coating after boiling in water; introducing a flexible segment with good rotation into the coating system can improve the flexibility of the coating, improve the crack resistance, and further enhance the adhesion of the coating

Method used

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  • Boiling-resistant paint and preparation method thereof, boiling-resistant coating and preparation method thereof, and application of boiling-resistant coating
  • Boiling-resistant paint and preparation method thereof, boiling-resistant coating and preparation method thereof, and application of boiling-resistant coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of the flexible segment: Add 50g of 1-6 hexanediol and 22g of hexamethylene diisocyanate (HDI) into a three-necked flask, add 0.05g of dibutyltin dilaurate and continue to react at 50°C for 12 hours, then start to add 25g of 3- Isocyanate propyltriethoxysilane was added dropwise in 1-2 hours, and the reaction was continued for 8 hours, and then 33 g of xylene was added and stirred for 0.5 hours to obtain R1.

[0025] Preparation of water-resistant coating: Add 25g of alkaline silica sol and 15g of distilled water to the reactor as a primer, add 4g of acetic acid to adjust the pH, add 70g of methyltriethoxysilane, 30g of tetraethoxysilane and 5g of R1, and continuously stir the reaction After 0.5-1 hour, add 45 g of isopropanol and 12 g of γ-glycidyl etheroxypropyl trimethoxysilane and heat to reflux for 1-3 hours to cool down and stop the reaction to obtain boiling-resistant coating A.

Embodiment 2

[0027] The preparation method of the flexible segment is the same as in Example 1 to obtain R1.

[0028] Preparation of water-resistant coating: add 32g alkaline silica sol and 17g distilled water to the reactor as a primer, add 4g acetic acid to adjust the pH, add 70g methyltriethoxysilane, 20g tetraethoxysilane, 15g dodecafluoroheptane Propyl trimethoxysilane and 7g R1, stirring continuously for 0.5-1h, adding 50g diacetone alcohol and 15g gamma-glycidyloxypropyltrimethoxysilane and heating to reflux for 1-3h to cool down and stop the reaction to obtain coating B.

Embodiment 3

[0030] Preparation of the flexible segment: add 66gPPG800 and 27g dicyclohexylmethane diisocyanate (HMDI) into the there-necked flask, add 0.05g dibutyltin dilaurate continuously, keep the reaction at 50-60°C for 12h, then start to keep warm and drop 25g3- Isocyanate propyltriethoxysilane, dropwise addition of 1-2h is completed, continue to keep warm for 8h, then add 35g of (2-butoxyethyl) acetate and stir for 0.5h to obtain R2.

[0031] Preparation of boil-resistant coating: Add 20g of alkaline silica sol and 15g of distilled water to the reactor as a primer, add 4g of acetic acid to adjust the pH, add 80g of methyltriethoxysilane, 40g of tetraethoxysilane and 10g of R2, and continuously stir the reaction After 0.5-1 hour, add 20 g of diacetone alcohol, 20 g of ethanol and 10 g of γ-(methacryloyloxy)propyltriethoxysilane and heat to reflux for 1-3 hours to cool down and stop the reaction to obtain coating C.

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Abstract

The invention relates to the technical field of paint coatings, in particular to a boiling-resistant paint and a preparation method thereof, a boiling-resistant coating and preparation method thereof,and application of a boiling-resistant coating. The boiling-resistant coating comprises the following components: alkoxy silane with at least three degrees of functionality, alkaline silica sol, distilled water, acetic acid, a solvent A, a soft segment and a silane coupling agent. The coating prepared in the invention has good transparency, good wear resistance, high adhesion, ultraviolet aging resistance, boiling resistance, high and low temperature impact resistance, damp and heat resistance, salt spray resistance and the like; by improving the crosslinking density of the coating, the compactness of the coating is improved, and the adhesive force performance of the coating after boiling is met; and moreover, the soft segment with good rotatability is introduced into the coating system,so that the flexibility and the crack resistance of the coating are improved, and the adhesive force of the coating is further improved.

Description

technical field [0001] The invention relates to the technical field of paint coatings, in particular to a boil-resistant paint, a coating and a preparation method and application thereof. Background technique [0002] Compared with traditional inorganic glass, organic glass is widely used due to its good toughness, high strength, and easy processing and molding. Among them, polycarbonate transparent materials have been widely used in various fields, but due to its own defects, it needs to be combined with The corresponding coating is required to meet the application requirements of the material. This supporting coating needs to have high light transmittance, good wear resistance, high adhesion and resistance to ultraviolet radiation. Currently, for these properties of the coating, Researchers at home and abroad have done a lot of research, such as US patent US3986997 using colloidal silicon dioxide and methyltriethoxysilane as raw materials to prepare transparent hardening c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D5/08C09D7/61C09D7/63C09D7/65C08J7/04C08J7/046C08L69/00
CPCC08G77/04C08J2369/00C08J2483/04C08L2201/08C08L2201/10C09D4/00C09D5/08C09D183/04C09D7/61C09D7/63C09D7/65C08L75/04C08K3/36C08K5/5435
Inventor 魏超王志强顾江东周敏施颖波李斌
Owner 中昊北方涂料工业研究设计院有限公司
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