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Composite waterborne alkyd resin with high storage stability

A technology of water-based alkyd resin and storage stability, applied in the field of coatings, can solve the problems of poor storage stability and poor performance, and achieve the effects of enhanced hardness of the paint film, increased dispersion, and diversified chain segments

Inactive Publication Date: 2016-07-20
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the defects of poor storage stability of water-based alkyd resins and poor performance relative to solvent-based alkyd resins in the prior art, and provides a composite water-based alkyd resin with high storage stability

Method used

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  • Composite waterborne alkyd resin with high storage stability
  • Composite waterborne alkyd resin with high storage stability
  • Composite waterborne alkyd resin with high storage stability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of sulfonate prepolymer: add 48.27g (0.18mol) isophthalic acid-5-sulfonic acid in a four-neck flask with stirring rod, thermometer, condenser, water separator, and nitrogen conduit Sodium, 93.74g (0.90mol) neopentyl glycol, 0.076g dibutyltin oxide, 15.0g deionized water, nitrogen gas, keep at 118°C for 1h, then raise the temperature to 158°C, keep hold for 1h, then gradually raise the temperature to 198°C ℃, keep warm for esterification until the acid value is lower than 5, discharge the material while it is hot, and grind it to powder after cooling to obtain the sulfonate prepolymer, which is stored under dry conditions for later use.

[0025] (2) Preparation of acrylic acid prepolymer: 14.5g α-methacrylic acid, 60g methyl methacrylate, 40g styrene, 20g butyl acrylate, 200g xylene, 6g benzoyl peroxide, 4g n- After dodecyl mercaptan is fully mixed, it is equally divided into two parts according to the mass, one part is added to a four-necked bottle with ...

Embodiment 2

[0030] (1) Preparation of sulfonate prepolymer: add 48.27g (0.18mol) isophthalic acid-5-sulfonic acid in a four-neck flask with stirring rod, thermometer, condenser, water separator, and nitrogen conduit Sodium, 68.49g (0.90mol) 1,3-propanediol, 0.080g dibutyltin dilaurate, 17.8g deionized water, nitrogen gas, keep warm at 120°C for 2h, then raise the temperature to 160°C, keep warm for 2h, then gradually Raise the temperature to 200°C, keep warm for esterification until the acid value is lower than 5, discharge the material while it is hot, and grind it to powder after cooling to obtain the sulfonate prepolymer, which is stored under dry conditions for future use.

[0031] (2) Preparation of acrylic acid prepolymer: in a beaker, 12g α-methacrylic acid, 8g acrylic acid, 50g methyl acrylate, 50g ethyl acrylate, 20g acrylonitrile, 260g xylene, 7.5g azobisisobutylcyanide, After 5.5g of 2-mercaptoethanol is fully mixed, it is divided into two parts according to the mass, one part ...

Embodiment 3

[0036] (1) Preparation of sulfonate prepolymer: add 48.27g (0.18mol) isophthalic acid-5-sulfonic acid in a four-neck flask with stirring rod, thermometer, condenser, water separator, and nitrogen conduit Sodium, 106.2g (0.90mol) of 1,6-hexanediol, 0.084g of dibutyltin dichloride, 21.3g of deionized water, nitrogen, at 122 ℃ for 1.5h, then heated to 162 ℃, 1.5 h, then gradually raise the temperature to 205°C, keep warm for esterification until the acid value is lower than 5, discharge the material while it is hot, grind it to powder after cooling, and obtain the sulfonate prepolymer, which is stored under dry conditions for future use.

[0037] (2) Preparation of acrylic acid prepolymer: 6g maleic anhydride, 17g allyl glycidyl ether, 30g methacrylamide, 20g styrene, 40g octadecyl acrylate, 30g methyl Isobornyl acrylate, 312g toluene, 9.6g tert-butyl hydroperoxide and 7.2g mercaptosuccinic acid are fully mixed, divided into two equal parts according to the mass, and one part is ...

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Abstract

The invention belongs to the field of coatings, and particularly relates to composite waterborne alkyd resin with high storage stability. The composite waterborne alkyd resin is prepared according to the following method: adding vegetable oil and polyols into a reaction vessel under the protection of nitrogen, raising the temperature to 118 to 122 DEG C, adding an alcoholysis catalyst, raising the temperature to 240 to 245 DEG C, preserving heat to an alcoholysis endpoint, reducing the temperature to 165 to 180 DEG C, adding an acrylic prepolymer, raising the temperature to 220 to 225 DEG C, preserving heat for esterification until the acid value is equal to or lower than 5, reducing the temperature to 145 to 160 DEG C, adding polyacid, a sulfonate prepolymer, a water-carrying agent and an esterification catalyst, raising the temperature to 220 to 225 DEG C, preserving heat for esterification until the acid value is lower than 15, adding modified attapulgite, preserving heat to continue reaction for 2 to 3h, reducing the temperature to 150 to 160 DEG C, performing reduced pressure vacuumizing to remove the water-carrying agent, reducing the temperature to 110 to 115 DEG C, adding 15 to 20 parts of a co-solvent, reducing the temperature to 50 to 80 DEG C, adding 70 to 85 parts of de-ionized water, performing complete stirring and regulating the pH to a proper value to obtain the composite waterborne alkyd resin. The composite waterborne alkyd resin has the beneficial effect that the prepared composite waterborne alkyd resin has extraordinarily high storage stability.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a composite water-based alkyd resin with high storage stability. Background technique [0002] Alkyd resin occupies an important position in the field of coatings because of its low cost, large formula adjustability, and excellent comprehensive performance of coating film. One of its raw materials, vegetable oil, has a wide range of sources, low price, and excellent performance. It is a renewable resource with great potential and is more suitable for the industrial production of alkyd resin than fatty acids. With the limitation of volatile organic compound (Volatile Organic Compound, VOC) emission in environmental regulations, although alkyd resin has many advantages, it must comply with the requirements of the times and reduce the content of organic solvents in its formula. In such a background of the times, water-based alkyd resins with water as a solvent came into being. [0003] Alt...

Claims

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Application Information

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IPC IPC(8): C08G63/20C08G63/78C08K9/06C08K3/34
CPCC08G63/20C08G63/78C08K3/346C08K9/06
Inventor 徐祖顺朱琴柯志刚曾维国张博晓
Owner HUBEI UNIV
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