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Preparation method of pale rosin pentaerythritol ester

A technology for rosin pentaerythritol ester and pentaerythritol, which is applied in the field of preparation of light-colored rosin pentaerythritol ester, can solve the problems of dark rosin pentaerythritol ester, limited application scope and the like, and achieves the effect of light color and shortening reaction time.

Active Publication Date: 2014-11-12
GUANGXI ZHONGCHANG RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of preparation method of light-colored rosin pentaerythritol ester, this method can solve the problem that the range of application of rosin pentaerythritol ester is limited because of darker color

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Distill the rosin under reduced pressure to obtain refined rosin: add 1 kg of refined rosin to the reaction vessel, under the protection of nitrogen, heat up to 160°C, heat and melt, and cool to room temperature; add 20 grams of catalyst to the reaction kettle in turn and 0.5 kilogram of xylene, stir evenly, slowly add 0.45 kilogram of pentaerythritol dropwise, introduce power in the reaction kettle and be 1500 watts of ultrasonic waves, under ultrasonic conditions, the chromaticity of esterification reaction to the solution is less than or equal to 5 Garner color numbers , stop the reaction.

[0015] In this embodiment, the vacuum degree is 0.3 kPa, and the catalyst in this implementation is a mixture of zinc oxide, cobalt acetate and sodium thiosulfate, wherein the mass ratio of zinc oxide, cobalt acetate and sodium thiosulfate is 1:0.5 :2.

Embodiment 2

[0017] Distill rosin under reduced pressure to obtain refined rosin: add 10 kg of refined rosin to the reaction vessel, under the protection of nitrogen, heat up to 165°C, heat and melt, and cool to room temperature; add 0.25 kg of catalyst to the reaction kettle in turn and 8 kilograms of xylene, stir evenly, slowly add 3 kilograms of pentaerythritol dropwise, and introduce power into the reaction kettle to be 1550 watts of ultrasonic waves, under ultrasonic conditions, the chromaticity of the esterification reaction to the solution is less than or equal to 5 Garner color numbers , stop the reaction.

[0018] In this embodiment, the vacuum degree is 0.6 kPa, and the catalyst in this implementation is a mixture of zinc oxide, cobalt acetate and sodium thiosulfate, wherein the mass ratio of zinc oxide, cobalt acetate and sodium thiosulfate is 1:0.3 : 0.5.

Embodiment 3

[0020] Distill rosin under reduced pressure to obtain refined rosin: add 50 kg of refined rosin to the reaction vessel, under the protection of nitrogen, heat up to 165 ° C, heat and melt, and cool to room temperature; add 1.5 kg of catalyst to the reaction kettle in turn and 32.5 kilograms of dimethylbenzene, stir evenly, slowly dropwise add 30 kilograms of pentaerythritol, introduce power into the reaction kettle and be 1600 watts of ultrasonic waves, under ultrasonic conditions, the chromaticity of esterification reaction to the solution is less than or equal to 5 Garner color numbers , stop the reaction.

[0021] In this embodiment, the vacuum degree is 1 kPa, and the catalyst in this implementation is a mixture of zinc oxide, cobalt acetate and sodium thiosulfate, wherein the mass ratio of zinc oxide, cobalt acetate and sodium thiosulfate is 1:0.4 :1.

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Abstract

The invention discloses a preparation method of pale rosin pentaerythritol ester. The preparation method includes the following steps that rosin is vacuumized, depressurized and distilled, so that refined rosin is obtained; the refined rosin is added to a reaction container, and under the protection effect of nitrogen, the refined rosin is heated, molten and cooled to room temperature; a catalyst and xylene are sequentially added to a reaction still and are evenly stirred, pentaerythritol is slowly added in a dropwise mode, ultrasonic waves with the power ranging from 1500 W to 1600 W are introduced to the reaction still, and under the condition of the ultrasonic waves, when the chrominance of the solution is smaller than or equal to 5 garner color number through esterification reaction, reaction is stopped, wherein the catalyst is a mixture of zinc oxide, cobaltous acetate and sodium thiosulfate. The prepared product is light in color and can be widely applied to industries of oil paint, paint, printing ink and the like.

Description

technical field [0001] The invention relates to the technical field of rosin deep processing, in particular to a preparation method of light-colored rosin pentaerythritol ester. Background technique [0002] Rosin is a renewable natural resin, known as "the oil that grows on trees", and is one of the important forest chemical products. Rosin is widely used in coatings, adhesives, inks, papermaking, soap, metal processing, synthetic rubber, building materials, food, polymers, fine chemicals and other industries. However, due to the instability of rosin itself, such as easy crystallization, easy to be oxidized and discolored, and low softening point, its performance and application fields are limited to a certain extent. Esterification modification of rosin is one of the important ways. [0003] Rosin pentaerythritol ester is synthesized by esterification of rosin with pentaerythritol after modification, and then made into irregular transparent flake solid after vacuum treatm...

Claims

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Application Information

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IPC IPC(8): C09F1/04
Inventor 黄桂彬
Owner GUANGXI ZHONGCHANG RESIN
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