Polyester paint of high solid for coiled material and lithographed sheet

A polyester coating, high solid technology, applied in polyester coatings, coatings, devices for coating liquid on the surface, etc., can solve troubles, coating film hardness, scratch resistance, flexibility/hardness balance, etc. problem, to achieve the effect of low viscosity, solve the problem of volatilization and retention, and solve the problem of leveling in the later stage

Inactive Publication Date: 2003-05-07
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the synthesis process of the film-forming resin, the reaction needs to be carried out step by step, which is troublesome. The film hardness, scratch resistance and flexibility / hardness balance of the obtained coating are not as good as ordinary solvent-based polyester coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 2

[0025] 1. See Table 2 for the formula

[0026]

raw material name

Dosage

parts by weight

Equivalent number

diol

Ethylene glycol

1,6-Hexanediol

158.3

620.3

5.1

10.5

a

Isophthalic acid (aromatic)

Terephthalic acid (aromatic)

Phthalic anhydride (aromatic)

253.4

332.2

233.3

3.05

4.0

3.15

Polyacid

trimellitic anhydride

19.9

0.31

Polyol

Trimethylolpropane

21.6

0.48

catalyst

Dibutyltin dilaurate

1.63

Heat stabilizers

Triphenyl phosphite

1.2

[0027] 2. Preparation process

[0028] Dibasic alcohols, dibasic acids, polybasic acids and polyhydric alcohols and 50 parts of reflux xylenes in the amount shown in Table 2 were put into the reaction flask identical to Example 1 at one time, slowly warmi...

example 3

[0032] 1. See Table 3 for the formula

[0033]

[0034] 2. Preparation process

[0035]Put the dibasic alcohols, dibasic acids and polyols and 50 parts of refluxed xylene in the same reaction flask as in Example 1 at one time as shown in the formula in Table 3, slowly raise the temperature to 120 ° C, and put in 1.71 parts of dilauric acid di Butyltin and 1.28 parts of triphenyl phosphite, continue to heat up until the material starts to reflux, then heat up at a rate of 10°C per hour, during which the gas phase temperature is controlled at 90±5°C, and the reaction temperature is 230±5°C and heat preservation is started until the acid value reaches When the concentration is 1.2 mgKOH / g, vacuumize for half an hour to remove residual small molecular substances and solvent molecules and perform metered reaction dehydration (207 parts of theoretically produced water). The temperature was lowered to about 150° C., and finally 376 parts of mixed thinner (Solvesso 150 / is...

example 4

[0041] Example 4 sea blue

[0042] 1. See Table 5 for the formula

[0043] raw material name

Dosage (parts by weight)

Film former

The polyester resin of example 1

(49.8%)

150

paint

Titanium dioxide (Kronos 2310)

Phthalocyanine blue (15:2)

(19.9%)

50

10

crosslinking agent

Melamine resin (Cymel 303)

(10.2%)

30.6

Auxiliary

Leveling agent (BYK-310)

Catalyst (Nacure 2500)

Dispersant (EFKA 4047)

(8.5%)

1.7

6.0

18.0

solvent

Solvesso 150 / Propylene Glycol Butyl Ether / Isophorone=3 / 1 / 1

(11.6%)

35.0

[0044] ②Kronos 2310 is the grade of chloride-process rutile titanium dioxide produced by Kronos Corporation of the United States;

[0045] ③BYK-310 is the grade of high temperature resistant silicone product produced by German BYK company;

[0046] ④Cymel 303 is the product brand of ful...

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Abstract

A high-solid polyester paint of coiled material and metallic plate is composed of polyester resina s filming substance, cross-linking agent, pigment, solvent and assistant. Its advantages are high solid content, low viscosity, and balanced flexibility and hardness.

Description

technical field [0001] The invention relates to a coiled material and a high-solid polyester coating for iron printing. Background technique [0002] Ordinary solvent-based polyester coatings have become one of the main coating varieties in the pre-coated coil industry due to their excellent mechanical properties, stain resistance and outdoor durability. However, the biggest disadvantage of this coating is the high content of volatile organic compounds (VOC). During the production and coating process of coatings, solvent volatilization not only causes energy consumption, but also causes harm to the environment and people. High-solid polyester coatings become an environmentally friendly coating due to their low solvent content, but it is difficult for such coatings to take into account low viscosity, high solid content, and good leveling, while maintaining the inherent properties of the above-mentioned solvent-based polyester coatings. Excellent performance. Someone once us...

Claims

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Application Information

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IPC IPC(8): B05D7/14C09D167/02
Inventor 朱莉刘卫平郑建龙吴奎录
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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