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A kind of preparation method of alkyd resin based on cardanol

A technology of alkyd resin and cardanol, applied in the chemical field, can solve the problems of insufficient strength and high cost of alkyd resin, achieve the advantages of performance and environmental friendliness, reduce the cost of raw materials, and reduce the cost of use

Inactive Publication Date: 2016-01-06
上海美东生物材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of preparation method of alkyd resin based on cardanol, the preparation method of described this alkyd resin based on cardanol will solve the technology that alkyd resin intensity is insufficient, cost is high in the prior art question

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  • A kind of preparation method of alkyd resin based on cardanol
  • A kind of preparation method of alkyd resin based on cardanol

Examples

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Embodiment 1

[0031] Cardanol and chloroacetic acid are first used as raw materials to synthesize cardanol ether ethyl acid, and its specific synthesis is as follows: cardanol 195g (0.65mol) is added in a four-necked flask, solvent 95% ethanol is added, and sodium hydroxide (48g , 1.2mol) of 50% aqueous solution was slowly dropped into the system, the reaction was stirred at room temperature for 30min, then heated to reflux for 30min, then chloroacetic acid (122g, 1.3mol) was added dropwise to the system, and the reaction was continued to be heated to reflux for 60min , and then vacuum evaporated the excess ethanol in the system, then added hydrochloric acid (1M) to adjust the pH>2, added 300mL ethyl acetate to separate layers, washed the organic phase with distilled water three times, then dried with anhydrous sodium sulfate, filtered, filtered The cake was rinsed twice with ethyl acetate (60 mL), the obtained organic phases were combined and the solvent was evaporated to obtain a pale yell...

Embodiment 2

[0038] First, cardanol and 3-chloropropionic acid were used as raw materials to synthesize cardanol ether ethyl acid. The specific synthesis was as follows: 195 g (0.65 mol) of cardanol was added to a four-necked flask, and 95% ethanol was added as a solvent, and then the hydrogen oxidized A 50% aqueous solution of sodium (48g, 1.2mol) was slowly dripped into the system, the reaction was stirred at room temperature for 30min, then heated to reflux for 30min, then 141.5g3-chloropropionic acid (1.3mol) was added dropwise to the system, the The reaction was continued to heat and reflux for 60 minutes, then the excess ethanol in the system was evaporated in vacuum, then hydrochloric acid (1M) was added to adjust the pH>2, 300mL ethyl acetate was added to separate layers, the organic phase was washed three times with distilled water, and then washed with anhydrous sodium sulfate After drying and filtering, the filter cake was rinsed twice with ethyl acetate (60 mL), the obtained org...

Embodiment 3

[0046] First, cardanol and 4-chlorobutyric acid were used as raw materials to synthesize cardanol butyl acid ether. The specific synthesis is as follows: 195 g (0.65 mol) of cardanol was added to a four-necked flask, and 95% ethanol was added as a solvent, and then the hydrogen was oxidized A 50% aqueous solution of sodium (48g, 1.2mol) was slowly dripped into the system, the reaction was stirred at room temperature for 30min, then heated to reflux for 30min, then 159.315g of chlorobutyric acid (1.3mol) was added dropwise to the system, the reaction Continue to heat and reflux for 60 minutes, then vacuum evaporate excess ethanol in the system, then add hydrochloric acid (1M) to adjust the pH>2, add 300mL ethyl acetate to separate layers, wash the organic phase with distilled water three times, and then dry it with anhydrous sodium sulfate , filtered, and the filter cake was rinsed twice with ethyl acetate (60 mL), the resulting organic phases were combined and the solvent was e...

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Abstract

The invention discloses a cardanol-based alkyd resin preparation method, which comprises the following steps of adding cardanol into a reaction container, adding an organic solvent for dissolution, adding a metal hydroxide aqueous solution into the reaction container, performing stirring and heating for refluxing, adding fatty acid chloride into the reaction container, performing heating for refluxing, performing vacuum evaporation to remove the organic solvent, adjusting the pH to be 1.5 to 3, adding ethyl acetate for demixing, washing an organic phase by using distilled water, drying the organic phase by using anhydrous sodium sulfate, performing filtration, washing a filter cake by using ethyl acetate, mixing the organic phase, and performing evaporation to remove the solvent to obtain pasty solid; adding the pasty solid and glycerin into a reaction container, heating dimethylbenzene for esterification, separating water by using a water separator, reducing the temperature, adding phthalic anhydride in batches, performing heating for refluxing until the viscosity and the acid value meet requirements, adding dimethylbenzene for dilution, and discharging to obtain alkyd resin. According to the method, the raw material cost is lowered; due to the special benzene ring-containing structure of the cardanol, the prepared alkyd resin has high performance of heat resistance, hardness and the like.

Description

Technical field: [0001] The invention relates to the field of chemistry, in particular to polymer materials, in particular to alkyd resins, and in particular to a method for preparing cardanol-based alkyd resins. Background technique: [0002] Alkyd resins are oil-modified polyester resins formed by the condensation polymerization of polyols, phthalic anhydride and fatty acids or oils (fatty acid triglycerides). According to the number and structure of double bonds in fatty acid (or oil) molecules, it can be divided into three types: dry, semi-dry and non-dry. Drying alkyds cure in air; non-drying alkyds are mixed with amino resins and cured by heating. In addition, it can also be divided into alkyd resins with short, medium, long and very long oil degrees according to the content of fatty acid (or oil) or phthalic anhydride used. After the alkyd resin is cured to form a film, it is shiny and tough, has strong adhesion, and has good wear resistance, weather resistance and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/49C08G63/47C08G63/46
Inventor 黎明黎炘宋学良
Owner 上海美东生物材料股份有限公司
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