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Preparation method of nano-SiO2 modified alkyd resin

A kind of alkyd resin and nano technology, applied in the direction of coating, polyester coating, etc., can solve the problems of resin viscosity increase, nano particle agglomeration, precipitation, etc., and achieve the effect of excellent hardness and good storage stability

Inactive Publication Date: 2016-06-01
UNION FOSHAN CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention directly disperses nanoparticles or modified nanoparticles into the resin by external addition method, and the nanoparticles are prone to agglomeration and precipitation, resulting in increased viscosity of the resin, poor storage stability of the resin, and decreased transparency.

Method used

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  • Preparation method of nano-SiO2 modified alkyd resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of nano-SiO 2 Modified lauric alkyd resin, its preparation method, comprises the steps:

[0020] a. In a container with ultrasonic waves, add 5 parts of nano-SiO by weight percentage 2 And 6 parts of neopentyl glycol, control the ultrasonic frequency of 1000kHz to react for 1h, and prepare nano-SiO 2 Alcohol dispersion, spare;

[0021] b. Equipped with agitator, condenser, N 2 In the synthesis kettle of the gas inlet, feed port, discharge port, oil-water separator, thermometer and sampling device, add 51 parts of lauric acid, 26 parts of phthalic anhydride, 12 parts of trimethylol propanol and 11 parts of nano-SiO 2 Alcohol dispersion, pass N 2 When the temperature is raised to 120°C, add 0.016 parts of LiOH catalyst and 5 parts of xylene as a reflux solvent. After the temperature is raised to 170°C and kept for 1.5 hours, the temperature is raised to 210°C at 10°C / h and kept for 2 hours until the acid value is 2 Modified lauric alkyd resin.

Embodiment 2

[0023] A kind of nano-SiO 2 Modified coconut oil alkyd resin, its preparation method, comprises the steps:

[0024] a. In a container with ultrasonic waves, add 4 parts of nano-SiO by weight percentage 2 And 6 parts of neopentyl glycol, control the ultrasonic frequency of 1000kHz to react for 1h, and prepare nano-SiO 2 Alcohol dispersion, spare;

[0025] b. Equipped with agitator, condenser, N 2 Add 52 parts of coconut oil acid, 13 parts of phthalic anhydride, 13 parts of isophthalic acid, and 12 parts of trimethylol in the synthesis kettle of gas inlet, feed port, discharge port, oil-water separator, thermometer and sampling device in sequence. propanol and 10 parts nano-SiO 2 Alcohol dispersion, pass N 2 When the temperature is raised to 120°C, add 0.018 parts of LiOH catalyst and 5 parts of xylene as a reflux solvent, heat up to 170°C and keep it warm for 1.5 hours, then raise the temperature to 220°C at 10°C / h, keep it warm for 2 hours, until the acid value 2 Modified...

Embodiment 3

[0027] A kind of nano-SiO 2 Modified soybean oil alkyd resin, its preparation method, comprises the steps:

[0028] a. In a container with ultrasonic waves, add 6 parts of nano-SiO by weight percentage 2 And 6 parts of neopentyl glycol, control the ultrasonic frequency of 1000kHz to react for 1h, and prepare nano-SiO 2 Alcohol dispersion, spare;

[0029] b. Equipped with agitator, condenser, N 2 In the synthesis kettle of the gas inlet, feed port, feed port, oil-water separator, thermometer and sampling device, add 50 parts of soy oil, 20 parts of phthalic anhydride, 6 parts of benzoic acid, 12 parts of trimethylolpropanol and 12 parts Nano SiO 2 Alcohol dispersion, pass N 2 When the temperature is raised to 120°C, add 0.02 parts of LiOH catalyst and 5 parts of xylene as a reflux solvent. After the temperature is raised to 170°C and kept for 1.5 hours, the temperature is raised to 210°C at 10°C / h and kept for 2 hours until the acid value is less than 12mgKOH / g. Cool down...

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Abstract

The invention relates to a preparation method of nano-SiO2 modified alkyd resin. The nano-SiO2 modified alkyd resin comprises, by weight, 30-60% of fatty acid, 6-20% of polyol, 4-10% of diol, 2-8% of nano-silica, 12-35% of organic acid anhydrides, 0.01-0.5% of an esterification catalyst and 30-45% of a solvent. The nano-SiO2 modified alkyd resin prepared in the invention has good storage stability, and a coating layer prepared by using the nanometer composite resin has excellent hardness, wear resistance, scratch resistance, ultraviolet resistance and ageing resistance and does not influence the transparence or the compatibility of the resin, and can be widely applied in surface coating and protection of woodenware, metals, plastics and other products.

Description

technical field [0001] The present invention relates to a kind of preparation method of modified alkyd resin, relate in particular to a kind of nano SiO 2 Modified alkyd resin belongs to the domain of synthetic resin technology. Background technique [0002] In recent years, in order to meet different performance requirements, the variety of modified alkyd resins has increased, including alkyd resins modified by rosin, styrene, acrylic acid, and silicone; due to the hardness, wear resistance, and Aging, slow drying, durability, water resistance and many other defects. [0003] The nano-modified composite resin coating layer can improve the aging resistance, scratch resistance, wear resistance, UV resistance, etc. of the coating, but when the nanoparticles are directly blended into the resin, the nanoparticles are prone to agglomeration and Precipitation, resin viscosity increases, transparency is poor, and it is impossible to prepare a stable nanoparticle-modified resin; i...

Claims

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Application Information

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IPC IPC(8): C08G63/20C08G63/78C08K3/36C09D167/08C09D7/12
Inventor 许钧强康伦国姚东生阳京辉
Owner UNION FOSHAN CHEM
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