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Polyester resin special for winding steel paint base and preparation thereof

A technology of polyester resin and primer, applied in polyester coatings, coatings, anti-corrosion coatings, etc., can solve the problems of limited processing performance of pre-coated coils, poor pertinence, and failure to achieve processing effects, etc., to achieve Ease of large-scale production, low requirements for production equipment, and high solid content

Inactive Publication Date: 2009-01-14
WUXI HUHUANG PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The polyester resin used for the primer in the coil coating on the market is generally the same as the polyester resin used for the top coat, which is not very specific and has no obvious characteristics
There are certain limitations on the processability of the pre-coated coils produced
Especially in the coating of home appliance boards, the ideal processing effect cannot be achieved.

Method used

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  • Polyester resin special for winding steel paint base and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A special polyester resin for the primer in coil coatings, which comprises the following components in parts by weight:

[0027] 35 parts of ethylene glycol

[0028] 35 parts of terephthalic acid

[0029] Dibutyltin dilaurate 0.1 part

[0030] 3 parts xylene

[0031] 20 parts of ethylene glycol butyl ether.

[0032] The production method is as follows:

[0033] 1. Fill the reaction kettle with a stirrer, a thermometer (including two thermometers: one for measuring the liquid phase temperature, and one for measuring the gas phase temperature), a reflux condenser, and a water separator. Phthalic acid and catalyst dibutyltin dilaurate through N 2 Protection, start heating up. Start stirring intermittently when the material is 160°C, observe the material in the kettle until it is completely dissolved before starting the stirring formally. Control the temperature of the liquid material in the kettle between 150 and 250°C, and the temperature of the gas phase at 95°C a...

Embodiment 2

[0037] A special polyester resin for the primer in coil coatings, which comprises the following components in parts by weight:

[0038] Glycerin 40 parts

[0039] Trimellitic anhydride 40 parts

[0040] Dibutyltin diacetate 0.1 part

[0041] S-100# 3 copies

[0042] 20 parts of cyclohexanone.

[0043] The production method is as follows:

[0044] 1. Put glycerin, trimellitic anhydride and catalyst in a reaction kettle equipped with a stirrer, a thermometer (including two thermometers: one for measuring liquid phase temperature and one for measuring gas phase temperature), reflux condenser and water separator Dibutyltin diacetate, through CO 2 Protection, start heating up. Start stirring intermittently when the material is 160°C, observe the material in the kettle until it is completely dissolved before starting the stirring formally. Control the temperature of the liquid material in the kettle between 150 and 250°C, and the temperature of the gas phase at 95°C and 105°C...

Embodiment 3

[0048] A special polyester resin for the primer in coil coatings, which comprises the following components in parts by weight:

[0049] Pentaerythritol 30 parts

[0050] 30 parts of isophthalic acid

[0051] Monobutyltin oxide 0.1 parts

[0052] 3 parts xylene

[0053] 20 parts of n-butanol.

[0054] The production method is as follows:

[0055] 1. Fill the reaction kettle with a stirrer, a thermometer (including two thermometers: one for measuring the liquid phase temperature, and one for measuring the gas phase temperature), a reflux condenser, and a water separator with a formula amount of pentaerythritol and resorcinol. Formic acid and catalyst monobutyltin oxide, pass through N 2 Protection, start heating up. Start stirring intermittently when the material is 160°C, observe the material in the kettle until it is completely dissolved before starting the stirring formally. Control the temperature of the liquid material in the kettle between 150 and 250°C, and the tem...

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Abstract

The invention discloses a special polyester resin for priming paint in coil coating. According to the weight parts, the polyester resin comprises alcohol of 30 parts to 40 parts; acid of 30 parts to 40 parts; catalyzer of 0.1 parts; refluxing solvent of 3 parts and diluting solvent of 20 parts. The invention also discloses the preparation method for the special polyester resin for the priming paint in the coil coating. The special polyester resin for the priming paint in the coil coating of the invention has the advantages of good solid parts, low viscosity, quick dry speed, quick flow flat, excellent adhesive force, excellent pliability, excellent pigment wetting dispersilbility and high cloth coating amount, wherein, the advantages of good solid parts, low viscosity and high cloth coating amount are especially hard to be achieved by the ordinary polyester resin for the priming paint; simultaneously, the special polyester resin conforms to the energy conservation requirement advocated by the state. The preparation method for the special polyester resin for the priming paint in the coil coating is simple, and the requirements for the production facilities are not high, thus the special polyester resin is suitable for large-scale production.

Description

technical field [0001] The invention relates to a coating and a preparation method thereof, in particular to a special polyester resin for steel coil primers and a preparation method thereof. Background technique [0002] Coil coating is a special coating used to coat the surface of steel plate and aluminum plate to make pre-coated coil. At present, coil coating technology is mainly developed in the direction of ultra-long life, product functionality and environmental friendliness, and is constantly exploring new application fields. The paint has been on the market as early as the 1920s. After World War II, the construction industry developed vigorously, and pre-coated coils were widely used due to their light weight, excellent performance and low price. With the advancement of technology, its application has become wider and wider, such as ship interior decoration, household appliances, furniture, interior and exterior buildings and other fields have successively adopted ...

Claims

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Application Information

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IPC IPC(8): C08G63/16C08G63/85C09D167/02C09D5/12B05D7/14
Inventor 翟维忠
Owner WUXI HUHUANG PAINT
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