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A kind of sulfonic acid type waterborne unsaturated polyester and its application in coating

An unsaturated, sulfonic acid-based technology, applied in polyester coatings, coatings, etc., can solve problems such as poor water resistance, low solid content, and poor gloss, and achieve the effect of improving hydrophilicity, high hardness, and easy control

Inactive Publication Date: 2015-10-07
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, water-based unsaturated polyester resin coatings also have defects, such as poor water resistance, poor gloss, low hardness, and low solid content, which limit their further development.
Therefore, synthesizing an unsaturated polyester resin that can be water-based, has good mechanical properties, and good water resistance has always been pursued by manufacturers, but so far this piece still belongs to a blank in domestic and foreign research.

Method used

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  • A kind of sulfonic acid type waterborne unsaturated polyester and its application in coating
  • A kind of sulfonic acid type waterborne unsaturated polyester and its application in coating
  • A kind of sulfonic acid type waterborne unsaturated polyester and its application in coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Sulfonic acid type aqueous unsaturated polyester emulsion of the present invention is prepared by the following method:

[0048] Step 1: Composition and ratio

[0049] According to the formula shown in table 1

[0050] Step 2: Synthesis of unsaturated polyester prepolymer

[0051] Dibasic alcohols, saturated dibasic acids, saturated acid anhydrides and unsaturated dibasic acids, that is, the raw materials listed in Table 1, succinic anhydride, adipic acid, phthalic anhydride, maleic acid, triethylene glycol, Put 1,4-butanediol into the reaction kettle, heat up to 120±2°C, add xylene, polymerization inhibitor hydroquinone and antioxidant triphenyl phosphite, start stirring after the reactants are completely dissolved, and keep warm for 1 hour; Continue to heat up to 160±2°C, keep warm for 2 hours while maintaining reflux; continue to heat up to 190±2°C, keep warm for 6 hours and use the water separator to remove water at the same time;

[0052] Step 3: Preparation of ...

Embodiment 2

[0061] Sulfonic acid type aqueous unsaturated polyester emulsion of the present invention is prepared by the following method:

[0062] Step 1: Composition and ratio

[0063] According to the formula shown in table 2

[0064] Step 2: Synthesis of unsaturated polyester prepolymer

[0065] According to the formula shown in Table 2, put diol, saturated acid anhydride and unsaturated acid anhydride into the reaction kettle, raise the temperature to 110±2°C, add xylene, polymerization inhibitor and antioxidant, start stirring after the reactants are completely dissolved, and keep warm for 1 Hours; continue to heat up to 170±2°C, keep warm for 2 hours and maintain reflux, then continue to heat up to 200±2°C, keep warm for 7 hours and use the water separator to remove water at the same time;

[0066] Step 3: Preparation of sulfonic acid type water-based unsaturated polyester

[0067] Add the water-based monomer shown in Table 2 and raise the temperature to 235±2°C at the same time...

Embodiment 3

[0074] Sulfonic acid type aqueous unsaturated polyester emulsion of the present invention is prepared by the following method:

[0075] Step 1: Composition and ratio

[0076] According to the formula shown in table 3

[0077] Step 2: Synthesis of unsaturated polyester prepolymer

[0078] According to the formula shown in Table 3, put diol, saturated acid anhydride and unsaturated dibasic acid into the reactor, raise the temperature to 115±2°C, add xylene, polymerization inhibitor and antioxidant, and start stirring after the reactants are completely dissolved. Keep warm for 2 hours; continue to heat up to 150±2°C, keep warm for 3 hours and keep reflux, then continue to heat up to 205±2°C, keep warm for 7 hours and use the water separator to remove water at the same time;

[0079] Step 3: Preparation of sulfonic acid type water-based unsaturated polyester

[0080] Add the water-based monomer shown in Table 3 and raise the temperature to 230±2°C at the same time, keep it warm...

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Abstract

The invention discloses sulphonic acid type water-based unsaturated polyester and application of the sulphonic acid type water-based unsaturated polyester in coating. The sulphonic acid type water-based unsaturated polyester is formed by polymerizing the following components in parts by weight: 35.52-42.35 parts of dihydric alcohol, 0-13.35 parts of saturated binary acid, 24.77-46.02 parts of saturated acid anhydride, 0-24.31 parts of unsaturated binary acid, 0-25.37 parts of unsaturated acid anhydride, 1.71-3.60 parts of water-based monomer, 0.010-0.049 part of polymerization inhibitor and 0.010-0.052 part of antioxidant; emulsification is carried out, then a cross-linking and curing reaction is carried out on emulsion and reactive diluent, wherein sulphonic acid type water-based unsaturated polyester emulsion accounts for 70-90%, and the reactive diluent accounts for 8-28%. The sulphonic acid type water-based unsaturated polyester has the advantages that raw materials are available and a technology is simple, the prepared sulphonic acid type water-based unsaturated polyester coating has good mechanical properties, water resistance and low VOC (volatile organic compounds) content of the coating are guaranteed, and the characteristics of good flexibility, high hardness and high drying speed are maintained.

Description

technical field [0001] The invention belongs to the field of water-based paints, and in particular relates to a sulfonic acid type water-based unsaturated polyester, a synthesis method and an application in paints. Background technique [0002] Unsaturated polyester resin is an important thermosetting resin variety developed in the modern chemical industry. Its outstanding water resistance, weather resistance, high hardness, and high fullness are one of the important resins for coatings. It is widely used in the coating of metal parts and wooden furniture, the anticorrosion of road markings and the insulation of electronic equipment. However, when using general-purpose unsaturated polyester resin to prepare coatings, there are disadvantages such as poor toughness, flammability, large shrinkage rate, poor heat resistance, and environmental pollution due to large volatilization of organic solvents. Common unsaturated polyester resin coatings have been unable to adapt needs of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/688C09D167/06C09D7/12
Inventor 何宇许凯陈荣杨坤陈鸣才许正敏方燕康伦国孙小光
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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