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Hydrolysis-resistant polyester resin for water-based coiled material finish paint coating and preparation method of hydrolysis-resistant polyester resin

A polyester resin, anti-hydrolysis technology, applied in polyester coatings, coatings, etc., can solve the problems of unstable storage, poor weather resistance, and low curing efficiency of water-based polyester resins

Active Publication Date: 2021-09-14
CHAMBROAD CHEM IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the technical problems currently existing, the invention provides a hydrolysis-resistant polyester resin for water-based coil topcoat coatings and a preparation method thereof, and synthesizes a hydrolysis-resistant polyester resin for water-based coil coating topcoats to solve the problem of water-based coatings. Polyester resin has problems such as unstable storage, poor weather resistance, and low curing efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Water-based coil paint coating method for hydrolyzing polyester resin:

[0028] Synthesis of hydrolysis monomers (V-1): Benzothylene terephthalic acid mixed with ethylene glycol glycidyl ether, warmed to 130 ° C, reaction 5H to obtain water hydrolysis monomer V-1, filtration;

[0029] 110 g of new pentanediol, 43 gV-1 monomer, 35 g of trimethylhydrin, 60 g of adipic acid, 200 g amphiphenylene terephthalic acid, 25 g 1, 4-cyclohexane fetalic acid were added to a thermometer, stirring device, and condensation In the four flasks of the divided device, the heat is slowly warmed to heat all the solid materials, the stirring is stirred; the catalyst is added to 150 ° C under 120 ° C material melting conditions, and the material temperature is adjusted to 150 ° C, and the reaction reaction is 1H, control The temperature increase rate at 10 ° C / h, gradually warmed to 220 ° C, and the reaction reaction was held at this temperature, and the amount of water of the reaction process w...

Embodiment 2

[0034] Water-based coil paint coating method for hydrolyzing polyester resin:

[0035] Synthesis of water hydrolysis monomorn V-1: mixed with ethylene terephthalic and ethylene glycol glycidyl ether and other substances such as glycidyl ether, warmed to 130 ° C, reaction 5h to obtain water hydrolysis monomer V-1, filtering, ready;

[0036] 99 g of new pentanediol, 48 gV-1 monomer, 16 g of trimethylolpropane, 35 g 2-methyl diol, 75 g of adipic acid, 140 g of terephthalic acid, 25 g 1, 4-cyclohexane addese In the four flasks of the thermometer, the mixing device and the condensate water supply, the heating is slowly warmed to melt the solid material, and stirring. Add the catalyst monuric oxide 0.5 g, 2 h within 2 hours of material melting conditions, and the temperature reactivity is 10 ° C / h, and the control temperature is gradually warmed to 220 ° C, and at this temperature. Under the insulation reaction. When the amount of water of the reaction process is continuously observed...

Embodiment 3

[0041] A method of preparing an aqueous topcoat coil coating by hydrolysis resistant polyester resin:

[0042] Synthesis of hydrolysable monomer anti V-1: the amount of phthalic acid and ethylene glycol glycidyl ether and the like mixed material was heated to 130. deg.] C, the reaction for 5h monomeric V-1 resistant to hydrolysis, then filtering;

[0043] 98g of glycerin, 45gV-1 monomer, 10g trimethylolpropane, 40g1,3- butylene glycol and adipic acid 75g, 150g phthalic anhydride, 23g1,2- cyclohexanedicarboxylic acid was added to the apparatus with a thermometer, a stirrer and a four-necked flask condensing trap device is heated slowly warmed to melt all of the solid material, stirring was started. At 120 deg.] C was added 0.5g of an esterification catalyst material within the melting conditions 4100,2h The batch temperature was adjusted to 160 ℃, the reaction incubated 1h, control the heating rate of 10 ℃ / h, gradually warming to 220 ℃, and maintained at this temperature the reac...

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Abstract

The invention belongs to the technical field of polyester resin preparation, and particularly relates to hydrolysis-resistant polyester resin for water-based coiled material finish paint and a preparation method of the hydrolysis-resistant polyester resin. The molecular weight of the polyester resin is 1000-20000, the acid value is 20-100 mgKOH / g, the hydroxyl value is 50-300 mgKOH / g, the solid content is 40-80%, and the neutralization degree is 50-100%. The preparation method comprises the following steps: selecting polyhydric alcohols, polyatomic acid monomers and hydrolysis-resistant monomers with excellent hydrolysis resistance, carrying out condensation polymerization under the condition of a catalyst to obtain a high-molecular polymer with medium and low molecular weights, enabling reaction between the high-molecular polymer and a water-based monomer, and finally neutralizing and adding water to obtain a water-based polyester resin product. The polyester resin disclosed by the invention is stable in storage, high in weather resistance and high in curing efficiency.

Description

Technical field [0001] The present invention belongs to the preparation of polyester resin, and more particularly to a hydrolysis polyester resin for aqueous coil paint coating and a preparation method thereof. Background technique [0002] At present, the pre-coating coating coating is mainly based on a solvent type, and the resin of the film forming material is an oily material. The solvent-based web coating contains a large amount of a fraternal solvent such as xylene, S150, and in the process of use, it is also necessary to use such a solvent to dilute. These organic solvents are prone to volatilize, severely pollute the environment; there is a safe risk of flammable and explosive, transportation and use; there is a lot of toxic gas volatilization during use, will have inhalation damage to workers, plus workshops in the workshop , Seriously harming the body of workers. [0003] At present, the national environmental situation is strive, and the oil content of oil coating is h...

Claims

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Application Information

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IPC IPC(8): C08G63/20C09D167/00
CPCC08G63/20C09D167/00
Inventor 崔国栋董双建杨云龙王瑞晓杨永全
Owner CHAMBROAD CHEM IND RES INST CO LTD
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