High stability color-less rosin pentaerythrite ester and its prepn

A technology of rosin pentaerythritol ester and high stability, which is applied in the field of high-stability colorless rosin pentaerythritol ester and its preparation, and can solve the problems of rosin ester compound color, thermal stability and weather resistance that cannot meet the higher requirements of esterified products, etc. , to achieve the effect of good thermal stability and weather resistance, low production cost and light color of the product

Inactive Publication Date: 2006-05-17
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The third method is to obtain light-colored rosin esters by adding a decolorizing agent, such as JP9143430, JP8209070, US5504152, US 5387669, US 5387669, WO0006657, etc. have invented the addition of organic phosphorus with decolorization during the esterification process or after the esterification is completed. However, the rosin esters obtained by these methods still cannot meet people's higher requirements for esterified products in terms of color, thermal stability, and weather resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A highly stable colorless rosin pentaerythritol ester, the color of the resin has a Hasson color number of less than 150; good thermal stability: placed in a blast drying oven at 180°C for 8 hours, the color change is not more than 1 Garner color number; weather resistance Good: at 20°C, irradiated for 15 hours at a distance of 50cm from a 500W UV lamp, the weight gain rate is not more than 0.2%, and the color change is not more than 3 Ghanaian color numbers.

Embodiment 2

[0024] A kind of preparation method of high stability colorless rosin pentaerythritol ester, comprises the steps:

[0025] In the first step, the super-grade rosin is distilled at a vacuum degree of 0-1kPa and a temperature of 180-270°C. The color of the prepared color is no greater than No. 3 in Ghana, the acid value is 160mg / g-190mg / g, and the softening point is 70°C ~85℃ refined rosin;

[0026] In the second step, under inert atmosphere conditions, the inert atmosphere can be N 2 , Ar, He, CO 2 equal atmosphere, add pentaerythritol accounting for 11.0-16.0% of the quality of refined rosin, decolorizer accounting for 0.1-1.0% of the quality of refined rosin, anthraquinone as an antioxidant accounting for 0.01-0.1% of the quality of refined rosin, and accounting for refined rosin. A catalyst with 0.1-0.5% rosin mass is used for esterification at 230-290°C for 3-10 hours until the acid value is less than 20mg / g; the decolorizing agent is 4,4-thiobis- (6-tert-butyl m-cresol)...

Embodiment 3

[0032] Add 1000g refined rosin, 140g pentaerythritol and 2g 300, 0.2g anthraquinone, 3g ZnO into the reaction flask, pass through N 2 , heated to 280±2°C, reacted until the acid value was less than 20mg / g, reduced pressure, kept the vacuum at 0-0.6kPa until there was no distillate, lowered the temperature to 220°C, added 1g of 2,6-di-tert-butyl- 4-Methylphenol, 1 g of tris(nonylphenyl)phosphite, and 1 g of 2-hydroxy-4-n-octyloxybenzophenone.

[0033] The product in this embodiment (colorless rosin pentaerythritol ester 1) color: 150 (Hasson color number), acid value: 14.2mg / g, softening point: 105.1 ℃, thermal stability test (180 ℃, 8h): color, 200 (Hasson color number); weather resistance test: weight gain rate, 0.20%, the color increased by 3 Garner color numbers.

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Abstract

The present invention discloses one kind of high stability color-less rosin pentaerythrite ester with Hason color number smaller than 150, color change after being set in a drying tank at 180 deg.c for 8 hr not greater than 1 Ghana color number and color change after being irradiated with ultraviolet lamp for 15 hr not greater than 3 Ghana color number. Its preparation process includes the following steps: distilling rosin to obtain refined rosin; adding pentaerythritol, decolorizing agent, antioxidant and catalyst to refined rosin for esterification until reaching acid value lower than 20 mg / g; decompressing to eliminate low boiling point matter; cooling, adding heat stabilizer and light stabilizer via stirring to obtain the high stability color-less rosin pentaerythrite ester. The present invention has simple technological process and low production cost.

Description

technical field [0001] The invention relates to a rosin pentaerythritol ester and a preparation method thereof, in particular to a highly stable colorless rosin pentaerythritol ester and a preparation method thereof. Background technique [0002] Rosin ester is a deep-processed product of rosin obtained by the reaction of rosin and polyols. It has a history of more than 70 years. It has a wide range of uses, and can be used as a tackifier for packaging materials, pressure-sensitive adhesives, hot-melt adhesives, etc., a modifier for rubber and plastics, and a styling agent for cosmetics. [0003] In many fields of application, the color and stability of rosin esters are an important indicator to determine its market viability. Since the 1970s, a lot of research has been done on the production of light-colored rosin and its esters at home and abroad. There are about two methods: the method represented by US Pat. No. 5,395,920 is to obtain color...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/04
Inventor 高宏宋湛谦商士斌王振洪饶小平
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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