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Method for producing pentalyn

A technology of rosin pentaerythritol ester and pentaerythritol, which is applied in the field of deep processing of rosin, can solve the problems of low purity of rosin pentaerythritol ester and restrictions on popularization and application of rosin pentaerythritol ester, and achieve the effect of high softening point

Inactive Publication Date: 2016-07-20
FINJET CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purity of the rosin pentaerythritol ester that this method makes is generally lower, makes the popularization and application of rosin pentaerythritol ester restricted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This rosin pentaerythritol ester comprises the following preparation steps:

[0020] A, raw material 100kg rosin is evacuated and decompressed and distilled to obtain refined rosin;

[0021] B. Put the refined rosin prepared in step A into the reaction kettle under stirring, and add 5kg of hydroquinone, 15kg of pentaerythritol and 0.02kg of cobalt acetate in sequence, and then heat it to 350°C under vacuum pressure and keep the temperature constant Stir and react for 2 hours;

[0022] C. Put the substance obtained in step B into the distillation tower, and put 0.0001kg of anthraquinone and 0.001kg of 4,4`-thiobis(6-tert-butyl-3-methylphenol), and then Under pressure, distill under the condition of heating to 200°C to obtain rosin pentaerythritol ester.

[0023] The softening point of the rosin pentaerythritol ester prepared in this example is as high as 120° C., and the purity is as high as 98%.

Embodiment 2

[0025] This rosin pentaerythritol ester comprises the following preparation steps:

[0026] A, raw material 100kg rosin is evacuated and decompressed and distilled to obtain refined rosin;

[0027] B. Under stirring, put the refined rosin prepared in step A into the reaction kettle, and add 6kg of hydroquinone, 25kg of pentaerythritol and 0.017kg of cobalt acetate in sequence, and then under vacuum pressure, heat to 300°C and keep the temperature constant Stir and react for 4 hours;

[0028] C. Put the material obtained in step B into the distillation tower, and put 0.00016kg of anthraquinone and 0.0015kg of 4,4`-thiobis(6-tert-butyl-3-methylphenol), and then Under pressure, distill under the condition of heating to 220°C to obtain rosin pentaerythritol ester.

[0029] The softening point of the rosin pentaerythritol ester prepared in this example is as high as 120° C., and the purity is as high as 98.5%.

Embodiment 3

[0031] This rosin pentaerythritol ester comprises the following preparation steps:

[0032] A, raw material 100kg rosin is evacuated and decompressed and distilled to obtain refined rosin;

[0033] B. Under stirring, put the refined rosin prepared in step A into the reactor, and add 8kg of hydroquinone, 20kg of pentaerythritol and 0.01kg of cobalt acetate in sequence, and then heat it to 330°C under vacuum pressure and keep the temperature constant Stir and react for 3 hours;

[0034] C. Put the substance obtained in step B into the distillation tower, and put 0.0002kg of anthraquinone and 0.002kg of 4,4`-thiobis(6-tert-butyl-3-methylphenol), and then Under pressure, distill under the condition of heating to 210°C to obtain rosin pentaerythritol ester.

[0035] The softening point of the rosin pentaerythritol ester prepared in this example is as high as 125° C., and the purity is as high as 98.1%.

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Abstract

The invention discloses a method for producing pentalyn, and belongs to the technical field of rosin deep processing.The pentalyn is prepared from, by weight, 100 parts of rosin, 0.0001-0.0002 part of anthraquinone, 5-8 parts of hydroquinone, 0.001-0.002 part of 4,4'-sulfo-bis(6-tert-butyl-3-methylphenol), 15-25 parts of pentaerythritol and 0.01-0.02 part of cobaltous acetate.The method comprises the steps that firstly, rosin is refined, the hydroquinone, the pentaerythritol and the cobaltous acetate are added, temperature is increased to 300-350 DEG C under vacuum pressure, constant-temperature stirring is performed, and the reaction is performed for 2-4 h; the anthraquinone and the 4,4'-sulfo-bis(6-tert-butyl-3-methylphenol) are added, then, temperature is increased to 200-220 DEG C under the vacuum pressure for distillation.The obtained pentalyn has the advantages of being high in softening point and purity.

Description

technical field [0001] The invention belongs to the technical field of rosin deep processing, in particular to a method for producing rosin pentaerythritol ester. Background technique [0002] Rosin pentaerythritol ester is an irregular transparent flaky solid with excellent heat resistance, aging resistance and good stability, good compatibility and solubility, good surface resistance and good color retention, mainly used in EVA heat Melt glue, hot-melt pressure-sensitive adhesive, hot-melt paint, ester glue, phenolic varnish, bookbinding glue, woodworking glue, etc., sanitary glue, structural glue, packaging glue, smoking glue, sealant, laminating glue, etc. [0003] The traditional preparation method of pentaerythritol ester of rosin is to synthesize rosin or light-colored rosin through esterification with pentaerythritol after modification, and make it through distillation. The purity of the rosin pentaerythritol ester prepared by this method is generally low, so that t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/04
CPCC09F1/04
Inventor 叶旗周卓瑜
Owner FINJET CHEM IND LTD
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