Synthesis method of gum rosin derivative maleopimaric acid dianhydride

A technology of maleopimaric anhydride and pimaric dianhydride, which is applied in the field of synthesis of gum rosin derivatives, can solve problems such as unspecified yield, and achieve high yield and high purity

Active Publication Date: 2013-08-21
广东中塑新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Lee J S etc. used rosin and maleic anhydride to react to obtain maleopimaric anhydride and then separated maleopimaric anhydride, and its yield was only 48% (Lee J S, Hong S I.Synthesis of acrylic rosin derivatives and application as negative phot

Method used

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  • Synthesis method of gum rosin derivative maleopimaric acid dianhydride

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Experimental program
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Embodiment

[0025] Embodiment: the synthetic method of maleopimaric acid dianhydride, carry out as follows:

[0026] (1) Abietic acid is purified from gum rosin:

[0027] Add 210g of gasoline (boiling range: 90-100°C) and 100g of gum rosin into a 1L four-necked bottle equipped with mechanical stirring, condenser and thermometer, start the stirrer at a stirring speed of 50r / min, and heat slightly to 40°C , so that the gum rosin is dissolved and clarified. Slowly add a solution of 30g cyclohexylamine dissolved in 35g gasoline (the specification is the same as above) to form a large amount of white precipitate. After the reaction at 40°C for 1 hour, cool it down to below 5°C with an ice-water bath and keep it for 30min. The precipitate was washed 3 times with gasoline cooled in an ice-water bath. After drying in a vacuum oven at 40°C, grind it into a powder and place it in a 500mL three-necked flask equipped with a mechanical stirrer, a condenser, and 55g of diethyl ether, and start the st...

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Abstract

The invention discloses a synthetic method of a gum rosin derivative maleopimaric acid dianhydride. Gum rosin is taken as a raw material for synthesizing the gum rosin derivative maleopimaric acid dianhydride. The synthetic method comprises the following steps of: firstly purifying abietic acid from gum rosin, then isomerising the abietic acid at high temperature to obtain pimaric acid, carrying out a reaction of the pimaric acid and maleic anhydride in the presence of p-methylbenzene sulfonic acid to obtain maleopimaric acid anhydride, and then synthesizing 1mol of maleopimaric acid dianhydride with 2mol of maleopimaric acid anhydride, and the maleopimaric acid dianhydride can be used for preparing polyimide by carrying out polymerization with a diamine monomer, or can be used for preparing polyamide imide by carrying out polymerization with a diamine monomer and a diacid monomer and or can be used for preparing polyamide imide by carrying out polymerization with a diamine monomer and an amino acid monomer. By adopting the synthetic method, yield is high, and product purity is high.

Description

technical field [0001] The present invention relates to the synthetic method of gum rosin derivative, specifically, relate to using gum rosin as raw material to synthesize gum rosin derivative maleopimaric acid dianhydride. Background technique [0002] Gum rosin is one of the main forestry products in my country, with a large annual output, and it has many excellent properties, such as anti-corrosion, moisture-proof, insulation, adhesion, emulsification, softening, etc. For nearly a century, gum rosin and its deep-processed modified products have been widely used in many fields such as coatings, adhesives, inks, papermaking, rubber, food additives, and biological products. Serialized product direction development. Gum rosin is a mixture of various resin acids and fatty acids, which contains about 90% resin acids and about 10% esters and unsaponifiable substances. The main component of resin acid is abietic acid with conjugated double bonds, and the conjugated double bonds...

Claims

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Application Information

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IPC IPC(8): C07D307/77
Inventor 朱怀才王忠强
Owner 广东中塑新材料股份有限公司
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