Synthesis method of gum rosin derivatives

A technology of gum rosin and rosin acid acyl, which is applied in the synthesis field of gum rosin derivatives, can solve problems such as unspecified yield, and achieve the effects of high yield and high purity

Active Publication Date: 2012-07-11
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 photo

Method used

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  • Synthesis method of gum rosin derivatives
  • Synthesis method of gum rosin derivatives
  • Synthesis method of gum rosin derivatives

Examples

Experimental program
Comparison scheme
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Embodiment

[0030] Embodiment Its preparation method of maleopimaric anhydride, maleopimaric acid chloride and maleopimaric acid dianhydride is carried out as follows:

[0031] (1) gum rosin purifies abietic acid:

[0032] Add 210g of gasoline (boiling range: 90-100°C) and 100g of gum rosin into a 1L four-neck flask 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 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 condens...

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Abstract

The invention discloses a synthesis method of gum rosin derivatives, and particularly relates to a method for preparing the gum rosin derivatives comprising maleopimaric acid acyl chloride. The synthesis method comprises the steps that abietic acid is firstly obtained through purifying the gum rosin; and then after the abietic acid is isomerized through high temperature to obtain pimaric acid, the pimaric acid reacts with maleic anhydride under the condition that p-toluene sulfonic acid exists, so as to obtain the maleopimaric acid acyl chloride. The method disclosed by the invention has the advantages of high process efficiency and good product purity.

Description

technical field [0001] The invention relates to a synthesis method of gum rosin derivatives, in particular to preparing gum rosin derivatives maleopimaric anhydride, maleopimaric acid chloride and maleopimaric dianhydride by using gum rosin as a raw material. 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 bo...

Claims

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Application Information

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IPC IPC(8): C07J73/00
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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