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Water-based silicon-modified polyester coil steel coating and preparation method thereof

A water-based silicone and polyester technology, applied in the direction of polyester coatings, coatings, etc., can solve the problems of low water resistance, poor weather resistance, poor heat resistance, etc., and achieve the effect of improving heat resistance

Pending Publication Date: 2022-06-24
深圳市深赛尔股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a water-based silicon-modified polyester coil steel coating and its preparation method, which has the advantages of high temperature resistance, strong hardness, and good flexibility, and solves the problem of existing polyester coatings. During use, there are disadvantages of poor heat resistance, low water resistance and poor weather resistance, which limit its application in high temperature resistant coatings

Method used

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  • Water-based silicon-modified polyester coil steel coating and preparation method thereof

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Effect test

Embodiment 1

[0025] A water-based silicon-modified polyester coil coating, comprising the following raw materials in parts by weight: 10 parts of polyols, 10 parts of dibasic acids, 0.02 parts of esterification catalysts, 0.02 parts of modified catalysts, 10 parts of organic silicon intermediates, and 4 parts of acid anhydrides. parts, 2 parts of organic amines, 5 parts of pigments, 5 parts of fillers, 0.3 parts of wetting agent, 0.2 parts of dispersant and 20 parts of deionized water.

[0026] As the technical solution of the present invention, a preparation method of water-based silicon-modified polyester is also proposed, comprising the following specific steps:

[0027] S1, 10 parts of polyols and 10 parts of dibasic acids are added to the reactor simultaneously, and the temperature is raised to 150-220° C. When the temperature reaches 150-220° C., the thermal insulation esterification is performed for 0.5 hours at this time to obtain mixed solution a. ;

[0028] S2, reduce the temper...

Embodiment 2

[0034] A water-based silicon-modified polyester coil coating, comprising the following raw materials in parts by weight: 13 parts of polyols, 12 parts of dibasic acids, 0.02 parts of esterification catalysts, 0.02 parts of modified catalysts, 10 parts of organic silicon intermediates, and 4 parts of acid anhydrides. parts, 2 parts of organic amines, 5 parts of pigments, 5 parts of fillers, 0.3 parts of wetting agent, 0.2 parts of dispersant and 20 parts of deionized water.

[0035] As the technical solution of the present invention, a preparation method of water-based silicon-modified polyester is also proposed, comprising the following specific steps:

[0036] S1, 13 parts of polyols and 12 parts of dibasic acids are added to the reaction kettle simultaneously, and the temperature is raised to 150-220°C, when the temperature reaches 150-220°C, insulation esterification is performed for 0.5 hours at this time to obtain mixed solution a ;

[0037] S2, reduce the temperature of...

Embodiment 3

[0043] A water-based silicon-modified polyester coil coating, comprising the following raw materials by weight: 15 parts of polyols, 15 parts of dibasic acids, 0.02 parts of esterification catalysts, 0.02 parts of modified catalysts, 10 parts of organic silicon intermediates, and 4 parts of acid anhydrides. parts, 2 parts of organic amines, 5 parts of pigments, 5 parts of fillers, 0.3 parts of wetting agent, 0.2 parts of dispersant and 20 parts of deionized water.

[0044] As the technical solution of the present invention, a preparation method of water-based silicon-modified polyester is also proposed, comprising the following specific steps:

[0045] S1, 15 parts of polyols and 15 parts of dibasic acids are added to the reactor simultaneously, and the temperature is raised to 150-220° C. When the temperature reaches 150-220° C., the thermal insulation esterification is performed for 0.5 hours at this time to obtain mixed solution a. ;

[0046] S2, reduce the temperature of ...

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Abstract

The invention relates to the technical field of water-based industrial coatings. The water-based silicon-modified polyester coil steel coating is prepared from the following raw materials in parts by weight: 10 to 30 parts of polyhydric alcohol, 5 to 25 parts of binary acid, 0.005 to 0.025 part of esterification catalyst, 0.005 to 0.025 part of modified catalyst, 10 to 25 parts of organic silicon intermediate, 2 to 10 parts of acid anhydride, 2 to 10 parts of organic amine, 5 to 15 parts of pigment, 5 to 10 parts of filler, 0.3 to 1 part of wetting agent, 0.2 to 0.8 part of dispersing agent and 5 to 30 parts of deionized water. According to the invention, the hydroxyl-terminated polyester resin is prepared from polyol and dibasic acid, the polyester resin is terminated by using a monomer containing carboxyl functional groups, and the polyester resin is modified by using an organic silicon intermediate containing silicon hydroxyl or silicon methoxy or silicon ethyoxyl, so that the characteristics of the polyester resin and the organic silicon resin are effectively exerted; and thus, the heat resistance, water resistance and chemical resistance of the polyester resin can be improved.

Description

technical field [0001] The invention relates to the technical field of water-based industrial coatings, in particular to a water-based silicon-modified polyester coil coating and a preparation method thereof. Background technique [0002] Polyester resin is the abbreviation of unsaturated polyester adhesive. Unsaturated polyester adhesive is mainly composed of unsaturated polyester resin, initiator, accelerator, filler, thixotropic agent, etc. The main chain contains -CH=CH- double bond A linear structure (see linear polymer) polyester resin, which can be mixed with olefinic monomers, such as styrene, acrylate, vinyl acetate, etc., under the action of initiators and accelerators, at room temperature It is polymerized into insoluble and infusible products. The English abbreviation of unsaturated polyester is UP. It is mainly used for the production of coil coatings. general name. [0003] However, polyester resin has the disadvantages of poor heat resistance, low water resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C08G63/91
CPCC09D167/00C08G63/914
Inventor 刘国民董卫星孙立强鲁天龙
Owner 深圳市深赛尔股份有限公司
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