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Fingerprint-resistant polyester resin and preparation method thereof

A technology of polyester resin and fingerprint resistance, which is applied in polyester coatings, coatings, powder coatings, etc. It can solve the problems of easy rubbing off, different functions and uses, and metal powder coatings are not wear-resistant, and achieve good weather resistance.

Inactive Publication Date: 2019-12-13
ANHUI SHENJIAN NEW MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Patents CN103131295B and CN103146272B respectively report a fingerprint-resistant metal powder coating and its preparation method, and a metal powder coating with enhanced flash effect and its preparation method. The fingerprint resistance mentioned in the patent refers to the instability of the metal pigment It leads to the phenomenon that the metal powder coating is not wear-resistant and easy to rub off, which is different from the "fingerprint" phenomenon mentioned in this patent, and the specific functions and uses are also different
Patent CN103360585B relates to a fluorine-modified high-scratch-resistant gloss resin and its preparation method. It introduces a scratch-resistant and fingerprint-resistant fluorine-containing resin. Whether it can be used in the field of powder coatings and has good fingerprint resistance remains to be seen. research

Method used

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  • Fingerprint-resistant polyester resin and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A handprint-resistant polyester resin, its raw material components and their quality are shown in Table 1.

[0021] Preparation of polyester resin:

[0022] A. Put the formulated amount of dihydric alcohol and trihydric alcohol into the reactor, heat the reactor to 95°C and start stirring, then put in the formulated amount of dicarboxylic acid and esterification catalyst, slowly raise the temperature to 246°C, and maintain the reaction until The acid value is 7.9mgKOH / g;

[0023] B. Lower the temperature of the kettle to 225°C, put in the capping agent, then raise the temperature to 232°C, and maintain the reaction until the acid value is 44.9mgKOH / g;

[0024] C. Under the condition of 228°C, vacuumize at -0.096MPa for 2.5h, then lower the temperature of the kettle to 200°C, put in curing accelerator and antioxidant, and keep it for 18min.

Embodiment 2

[0026] A handprint-resistant polyester resin, its raw material components and their quality are shown in Table 1.

[0027] Preparation of polyester resin:

[0028] A. Put the formulated amount of dihydric alcohol and trihydric alcohol into the reactor, heat the reactor to 93°C and start stirring, then put in the formulated amount of dicarboxylic acid and esterification catalyst, slowly raise the temperature to 248°C, and maintain the reaction until The acid value is 8.5mgKOH / g;

[0029] B. Lower the temperature of the kettle to 227°C, put in the capping agent, then raise the temperature to 236°C, and maintain the reaction until the acid value is 45.5mgKOH / g;

[0030] C. Under the condition of 229°C, vacuumize at -0.097MPa for 2.2h, then lower the temperature of the kettle to 205°C, put in curing accelerator and antioxidant, and keep it for 20min.

Embodiment 3

[0032] A handprint-resistant polyester resin, its raw material components and their quality are shown in Table 1.

[0033] Preparation of polyester resin:

[0034] A. Put the formulated amount of dihydric alcohol and trihydric alcohol into the reactor, heat the reactor to 108°C and start stirring, then put in the formulated amount of dicarboxylic acid and esterification catalyst, slowly raise the temperature to 247°C, and maintain the reaction until The acid value is 9.1mgKOH / g;

[0035] B. Lower the temperature of the kettle to 220°C, put in the capping agent, then raise the temperature to 233°C, and maintain the reaction until the acid value is 43.8mgKOH / g;

[0036] C. Under the condition of 231°C, vacuumize at -0.094MPa for 2.8h, then lower the temperature of the kettle to 195°C, put in curing accelerator and antioxidant, and maintain for 22min.

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Abstract

The invention aims to provide fingerprint-resistant polyester resin and a preparation method thereof. A raw material is prepared from a dicarboxylic acid, a dihydric alcohol, a trihydric alcohol, an esterification catalyst, an end-capping reagent, a curing accelerator, and an anti-oxidant. The invention also provides a preparation method of the resin. The fingerprint-resistant polyester resin is adopted to prepare a powder coating, after 10min of curing at 200 DEG C, the coating layer mechanical properties, adhesion and weatherability are excellent; no obvious fingerprint phenomenon or glossloss phenomenon is caused after contact by sweaty hands and baking at 120-140 DEG C for a certain period of time, and the fingerprint-resistant polyester resin can be used in various types of powder coatings such as coatings with highlight, orange peel and sand streaks.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a fingerprint-resistant polyester resin and a preparation method thereof. Background technique [0002] Powder coatings have the characteristics of energy saving, environmental protection, and excellent comprehensive performance. Compared with traditional liquid coatings, powder coatings have the advantage of no solvent volatilization. However, in the actual spraying and curing process, a small amount of small molecular substances will still volatilize in the powder coating, and the most common phenomenon is "smoking" during the curing process. There is another phenomenon that is easily overlooked, that is, the "fingerprint" phenomenon. For example: when the workpiece is sprayed, the worker's hand directly touches the coating film when unloading the workpiece, which is prone to "fingerprints"; or if the workpiece is flawed, the secondary spraying is cured, and there is no secon...

Claims

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Application Information

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IPC IPC(8): C08G63/20C08G63/78C09D167/02C09D5/03C09D5/28
CPCC08G63/20C08G63/78C09D5/03C09D5/28C09D167/02
Inventor 翟春海
Owner ANHUI SHENJIAN NEW MATERIALS
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