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Preparation method of degradable rosin resin

A technology of rosin resin and rosin, which is applied in the direction of rosin adhesive, chemical modification of natural resin, plastic recycling, etc., to achieve the effect of good viscosity and good compatibility

Active Publication Date: 2022-01-11
广东科茂林产化工股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of the rosin resin prepared by the above-mentioned method still needs to be further improved.

Method used

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  • Preparation method of degradable rosin resin
  • Preparation method of degradable rosin resin
  • Preparation method of degradable rosin resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) 600 grams of masson rosin are dropped into a reaction flask equipped with a thermometer and agitator, heated to 180° C. for melting under nitrogen protection;

[0046] (2) Put in 15 grams of fumaric acid, and keep warm at 200°C for 1 hour after adding;

[0047] (3) Add 1.8 grams of mixed catalyst (a mixture of 4,4'-thiobis(6-tert-butyl-3-methylphenol) and zinc oxide at a mass ratio of 1.8:1), 48 grams of ethylene glycol, and 12 grams of glycerin 1. 6 grams of sorbitol, stirred and reacted at 220°C for 1 hour, then stirred and reacted at 250°C for 1 hour, and stirred and reacted at 275°C for 7 hours;

[0048] (4) Remove the water generated by the reaction in vacuum, cool to 220°C, add 0.9 grams of antioxidant 2,6-di-tert-butyl-4-methylphenol, degradation accelerator (potassium dihydrogen phosphate, iron stearate and 3 grams of cerium diethyldithiocarbamate according to the mass ratio of 3:5:1 mixture), stir evenly, and discharge to obtain rosin resin.

Embodiment 2

[0050] (1) 600 grams of masson rosin are dropped into a reaction flask equipped with a thermometer and agitator, heated to 180° C. for melting under nitrogen protection;

[0051](2) Add 3 grams of mixed catalyst (a mixture of 4,4'-thiobis(6-tert-butyl-3-methylphenol) and zinc oxide at a mass ratio of 1.8:1), 90 g of ethylene glycol, and 6 grams of glycerin 1. 3 grams of sorbitol, stirred and reacted at 200°C for 1 hour, then stirred and reacted at 225°C for 1 hour, and stirred and reacted at 250°C for 7 hours;

[0052] (4) Remove the water generated by the reaction in vacuum, cool down to 180°C, add 3 grams of antioxidant 2,6-di-tert-butyl-4-methylphenol, degradation accelerator (sodium dihydrogen phosphate, iron stearate and 6 grams of cerium diethyldithiocarbamate according to the mass ratio of 3:5:1 mixture), stir evenly, and discharge to obtain rosin resin.

Embodiment 3

[0054] (1) 600 grams of wetland rosin are dropped into a reaction flask equipped with a thermometer and a stirrer, heated to 180° C. for melting under nitrogen protection;

[0055] (2) drop in 48 grams of maleic anhydride, and keep warm at 160° C. for 1 hour after adding;

[0056] (3) Add 0.06 g of mixed catalyst (a mixture of 4,4'-thiobis(6-tert-butyl-3-methylphenol) and zinc oxide at a mass ratio of 1.8:1), 36 g of ethylene glycol, and 18 g of glycerin 12 grams of sorbitol, stirred and reacted at 250°C for 1 hour, then stirred and reacted at 275°C for 1 hour, and stirred and reacted at 290°C for 5 hours;

[0057] (4) Remove the water generated by the reaction in vacuum, cool to 240°C, add 0.06 g of antioxidant 2,6-di-tert-butyl-4-methylphenol, degradation accelerator (sodium dihydrogen phosphate, zinc stearate and 0.3 g of cerium diethyldithiocarbamate according to the mass ratio of 3:5:1 mixture), stir evenly, and discharge to obtain rosin resin.

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Abstract

The invention discloses a preparation method of degradable rosin resin, and belongs to the field of deep processing of rosin. The method comprises the following steps: melting rosin under the protection of inert gas; adding unsaturated acid, and reacting; adding a catalyst and mixed alcohol, and reacting; removing water generated in the reaction, cooling, adding an antioxidant and a degradation accelerant, and uniformly mixing to obtain the rosin resin. The rosin resin prepared by the invention is degradable and good in appearance, has good stability and good viscosity when being applied to degradable hot melt adhesives, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of deep processing of rosin, and in particular relates to a preparation method of degradable rosin resin. Background technique [0002] Rosin is an important natural product in my country, a renewable resource, commonly used in coatings, inks, adhesives and other fields. There are carboxyl groups and conjugated double bonds in rosin molecules, which have certain reactivity, but there are relatively large defects in application, such as high acid value, poor acid and alkali resistance, etc. The main component in rosin is abietic acid, and the typical structural formula of abietic acid is the compound shown in the following formula I. When heated above 100°C, abietic acid will be isomerized to form L-pimaric acid (Ⅳ), which can be combined with Other compounds with conjugated double bonds undergo Diels-Alder addition reactions. In order to broaden the application of rosin, rosin is usually modified, and the carboxyl g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09F1/04C09J193/04C09J123/08
CPCC09F1/04C09J193/04C09J123/0853C08L2201/06C08L23/0853C08L93/04Y02W30/62
Inventor 许健兴徐社阳陈军
Owner 广东科茂林产化工股份有限公司
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