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Preparation method of pale rosin ester

A rosin ester, light-colored technology is applied in the field of preparation of light-colored rosin esters, and can solve the problems such as the inability to meet market demands and the dark color of rosin esters.

Inactive Publication Date: 2014-10-08
GUANGXI ZHONGCHANG RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the oxidation of rosin in the deep processing process, the color of the obtained rosin ester is too dark, which cannot meet the needs of the market.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The preparation method of this light-colored rosin ester comprises the following steps:

[0014] A. Put 50kg of rosin into the reaction kettle, under the condition of nitrogen as a protective agent, adjust the intake of nitrogen to 5ml / min, heat it to completely melt, then raise the temperature to 200°C, and keep it warm for 4 hours;

[0015] B. After step A, add 5kg of polyol, 0.8kg of zinc oxide, 0.8kg of sodium thiosulfate and 0.6kg of calcium hypophosphite into the reaction kettle, stir evenly, and continue to keep warm at 200°C for 1 hour; then raise the temperature To 270°C, heat preservation reaction for 4h;

[0016] C. After step B, vacuumize to remove low boilers, then lower the temperature to 200°C, and discharge to obtain the light-colored rosin ester.

[0017] The Garner color number of the light-colored rosin ester prepared in this example is 3, and the softening point is 105°C.

Embodiment 2

[0019] The preparation method of this light-colored rosin ester comprises the following steps:

[0020] A. Put 60kg of rosin into the reaction kettle, under the condition of nitrogen as a protective agent, adjust the intake of nitrogen to 8ml / min, heat it to completely melt, then raise the temperature to 220°C, and keep it warm for 1h;

[0021] B. After step A, add 8kg of polyol, 0.8kg of zinc oxide, 0.8kg of sodium thiosulfate and 0.6kg of calcium hypophosphite into the reaction kettle, stir evenly, and continue to keep warm for 0.5h at 220°C; then heat up To 280°C, heat preservation reaction for 2h;

[0022] C. After step B, vacuumize to remove low boilers, then lower the temperature to 200°C, and discharge to obtain the light-colored rosin ester.

[0023] The Garner color number of the light-colored rosin ester prepared in this example is 3, and the softening point is 106°C.

Embodiment 3

[0025] The preparation method of this light-colored rosin ester comprises the following steps:

[0026] A. Put 55kg of rosin into the reaction kettle, under the condition of nitrogen as a protective agent, adjust the intake of nitrogen to 7ml / min, heat it to completely melt, then raise the temperature to 210°C, and keep it warm for 3 hours;

[0027] B. After step A, add 5kg of polyol, 0.6kg of zinc oxide, 0.6kg of sodium thiosulfate and 0.5kg of calcium hypophosphite into the reaction kettle, stir evenly, continue to keep warm at 210°C for 0.5h; then raise the temperature To 275°C, heat preservation reaction for 3h;

[0028] C. After step B, vacuumize to remove low boilers, then lower the temperature to 205°C, and discharge to obtain the light-colored rosin ester.

[0029] The Garner color number of the light-colored rosin ester prepared in this example is 3, and the softening point is 104°C.

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Abstract

The invention discloses a preparation method of pale rosin ester, belonging to the technical field of deep processing of rosin. The method comprises the following steps: putting rosin in a reaction kettle, controlling the nitrogen gas input, and heating to 200-220 DEG C to carry out thermal insulation reaction; and adding polyalcohol, zinc oxide, sodium thiosulfate and calcium hypophosphite, carrying out thermal insulation reaction at 200-220 DEG C, heating to 270-280 DEG C, carrying out thermal insulation reaction, vacuumizing to remove low-boiling-point substances, cooling, and discharging to obtain the pale rosin ester. By maximally lowering the oxidation of rosin, the color of the prepared pale rosin ester is very light.

Description

technical field [0001] The invention belongs to the technical field of rosin deep processing, and in particular relates to a preparation method of light-colored rosin ester. Background technique [0002] Rosin is a non-volatile natural resin obtained from pine resin as raw material through different processing methods. Rosin is an important chemical raw material, widely used in soap, paper, paint, rubber and other industries. In addition, rosin can also be made into rosin ester through deep processing. Compared with rosin, its acid value is significantly reduced, brittleness and stickiness are reduced, and weather resistance is improved. However, due to the oxidation of rosin in the deep processing process, the color of the obtained rosin ester is too dark, which cannot meet the needs of the market. Contents of the invention [0003] The technical problem solved by the present invention is to provide a preparation method of light-colored rosin ester, the rosin ester prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/04
Inventor 黄桂彬
Owner GUANGXI ZHONGCHANG RESIN
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