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Aqueous organosilicone-modified alkyd resin and preparing method thereof

A technology of alkyd resin and silicone, which is applied in the direction of polyester coatings and coatings, can solve the problems of low storage performance of alkyd resin, high reaction temperature, easy caking gel, etc., and achieve low viscosity and low product cost. Low, full film effect

Inactive Publication Date: 2014-10-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the addition of silicone improves the water resistance and heat resistance of the alkyd resin, the storage performance of the silicone-modified alkyd resin is low, it is easy to agglomerate and gel, a large amount of organic solvent is used, and the reaction temperature is high. (When silicone is modified) and other shortcomings, how to overcome these shortcomings and improve the performance of materials has become the focus of people's research

Method used

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  • Aqueous organosilicone-modified alkyd resin and preparing method thereof
  • Aqueous organosilicone-modified alkyd resin and preparing method thereof
  • Aqueous organosilicone-modified alkyd resin and preparing method thereof

Examples

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Embodiment 1

[0037] Under the condition of nitrogen protection, add 50.05g of linseed oil, 13.01g of glycerin and 0.038g of alcoholysis catalyst LiOH to the reaction vessel, first raise the temperature to 180°C at a rate of 3°C / min, and then increase the temperature at a rate of 40°C / h Raise the temperature to 220°C for alcoholysis reaction; when the tolerance of ethanol with a mass concentration of 87% reaches 1:3, start to cool down; cool down to 160°C, add 23.38g of phthalic anhydride, 5.06g2 , 2-dimethylol propionic acid, 0.022g esterification catalyst BC-98 and consumption are the reflux solvent xylene of total charging capacity 5% (total charging capacity is unsaturated fatty oil, polyhydric alcohol, polybasic acid and 2,2 - the total content of dimethylolpropionic acid), and install a water separator to remove the water generated by the entire esterification reaction (theoretical water output is 2.44g), keep it warm for 1h, and slowly heat up to 220°C at a speed of 20°C / h; Stop heat...

Embodiment 2

[0039]Under the condition of nitrogen protection, 59.85g of soybean oil, 12.59g of pentaerythritol and 0.040g of alcoholysis catalyst CaO were added to the reaction vessel, and the temperature was first raised to 180°C at a rate of 3°C / min, and then at a rate of 60°C / h Raise the temperature to 250°C for alcoholysis reaction; when the tolerance of ethanol with a mass concentration of 87% reaches 1:4, start to cool down; cool down to 200°C, add 21.21g of phthalic anhydride, 2.24g of cis Butenedioic anhydride, 5.45g2, 2-dimethylol propionic acid, 0.088g esterification catalyst BC-98 and consumption are the reflux solvent xylene of 10% of total charging amount, install water trap simultaneously and remove the esterification reaction to generate Water (theoretical water output is 2.40g), slowly heat up to 260°C at a rate of 30°C / h; stop heating when the acid value of the system is 80mgKOH / g, and start to cool down to 80°C at a rate of 15 drops per minute 21.58 g of methyltriethoxys...

Embodiment 3

[0042] Under the condition of nitrogen protection, add 40.05g of linseed oil, 10.00g of tung oil, 8.78g of 1,1,1-trimethylolpropane and 0.022g of alcoholysis catalyst LiOH to the reaction vessel, first at a rate of 3°C / min Raise the temperature to 180°C, and then raise the temperature to 230°C at a rate of 50°C / h for alcoholysis; when the tolerance of ethanol with a mass concentration of 87% reaches 1:6, start to cool down; Add 21.43g of phthalic anhydride, 2.07g of nadic anhydride (cis-3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride), 5.29g of 2,2 -Dimethylol propionic acid, 0.058g esterification catalyst BC-98 and consumption are the reflux solvent dimethylbenzene of 8% of total charging capacity, install water separator simultaneously and remove the water that esterification generates (theoretical water yield is 2.36g) , slowly warming up to 240°C at a rate of 10°C / h; stop heating when the acid value of the system is 60mgKOH / g, start to cool down, drop the temperatur...

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Abstract

The invention belongs to the technical field of chemical engineering, and discloses aqueous organosilicone-modified alkyd resin and a preparing method thereof. The aqueous organosilicone-modified alkyd resin comprises following components by weight: 40-60 parts of nonsaturated fatty oil, 10-20 parts of polyol, 15-35 parts of polyatomic acid, 5-20 parts of 2,2-dimethylolpropionic acid, 20-35 parts of an organosilicon monomer, 0.010-0.040 part of an alcoholysis catalyst, 0.020-0.080 part of an esterification catalyst, 10-25 parts of a cosolvent, 4-15 parts of a neutralizer and 50-90 parts of water. The prepared alkyd resin has characteristics of clear appearance, good water solubility, good properties, no toxicity, no harm, and capability of meeting the environmental requirements.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to an alkyd resin, in particular to a water-based organosilicon-modified alkyd resin and a preparation method thereof. Background technique [0002] Alkyd resin is an important chemical product. Its monomers are rich in sources, low in price, diverse in variety, and varied in formulation. Since its development, alkyd resin has always occupied an important position in the coatings industry. [0003] In traditional methods, alkyd resin (prepolymer) mainly uses trimellitic anhydride as a water-based monomer, but the prepolymer prepared by this process has a high viscosity, which is not conducive to the implementation of subsequent modification steps. Due to the presence of ester groups, alkyd resins have low hardness, poor heat resistance and weather resistance. How to improve the performance of alkyd resin coatings has become the focus of people's discussion and research. Fro...

Claims

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Application Information

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IPC IPC(8): C08G63/91C08G63/695C09D167/08
Inventor 涂伟萍周达朗
Owner SOUTH CHINA UNIV OF TECH
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