Preparation method of rosin modified phenolic resin

A technology for modifying phenolic resin and rosin, which is applied in the field of phenolic resin, can solve the problems of poor solubility of rosin-modified phenolic resin, and achieve the effects of effective control of resin viscosity, good oil solubility, and simple operation

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

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Problems solved by technology

[0003] The purpose of this invention is to provide a kind of preparation method of rosin modified phe

Method used

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  • Preparation method of rosin modified phenolic resin

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Experimental program
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Effect test

Embodiment 1

[0013] Add 3 kg of cresol and 30 g of anhydrous aluminum trichloride to the reaction kettle, raise the temperature to 60°C, add 1.2 kg of solid formaldehyde while stirring, adjust the solution to alkaline, raise the temperature to 100°C, and react for 5 hours; Add 9 kg of rosin to the kettle, heat up to 155°C, and react for 4.5 hours; add 1.5 kg of sorbitol and 10 g of metaphosphoric acid to the reactor, heat up to 200°C, react for 2 hours, continue to heat up to 230°C, and react for 2 hours to obtain Rosin modified phenolic resin.

Embodiment 2

[0015] Add 40 kg of dodecylphenol and 400 g of anhydrous aluminum trichloride to the reaction kettle, raise the temperature to 60°C, add 12 kg of solid formaldehyde while stirring, adjust the solution to alkaline, raise the temperature to 115°C, and react for 4 hours Add 95 kilograms of rosin in the reactor, heat up to 150 ° C, react for 4.5 hours; add 15 kg of xylitol and 200 grams of metaphosphoric acid in the reactor, heat up to 190 ° C, react for 2 hours, continue to heat up to 240 ° C, react After 1 hour, a rosin-modified phenolic resin was obtained.

Embodiment 3

[0017] Add 35 kg of p-tert-butylphenol and 300 g of anhydrous aluminum trichloride to the reaction kettle, raise the temperature to 65°C, add 10 kg of solid formaldehyde while stirring, adjust the solution to alkaline, raise the temperature to 110°C, and react for 4.5 hours Add 100 kilograms of rosin in the reactor, heat up to 145 ° C, react for 4.5 hours; add 17 kg of pentaerythritol and 150 grams of metaphosphoric acid in the reactor, heat up to 180 ° C, react for 2.5 hours, continue to heat up to 235 ° C, react for 1.5 hours, to obtain rosin-modified phenolic resin.

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Abstract

The invention discloses a preparation method of rosin modified phenolic resin, and relates to the technical field of phenolic resin. The preparation method includes the steps that phenol and aluminum chloride anhydrous are added to a reaction still, temperature rises, polymerized formaldehyde is added while the solution is stirred, the solution is adjusted to be alkaline, temperature rises, and reaction is conducted, wherein the phenol is one or more of cresol, P-tert-butylphenol and dodecylphenol; rosin is added for modification, temperature rises, and reaction is conducted; polyhydric alcohols and metaphosphoric acid are added, and temperarure rise and reaction are conducted in stages, wherein polyhydric alcohols are one or more of pentaerythritol, xylitol and sorbitol. The rosin modified phenolic resin is good in viscosity, better in oil solubility, high in softening point, and suitable for planographic or intaglio printing ink.

Description

technical field [0001] The invention relates to the technical field of phenolic resins, in particular to a preparation method of rosin-modified phenolic resins. Background technique [0002] Rosin-modified phenolic resin is widely used in printing ink and paint manufacturing industries. It is used in combination with other materials such as mineral solvents and vegetable oils to make inks and paints. The quality of rosin-modified phenolic resin directly determines the drying performance and film-forming properties of inks. performance etc. At present, the preparation of rosin-modified phenolic resin usually adopts the condensation reaction of p-tert-butylphenol and formaldehyde under alkaline conditions to form a phenolic polymer, then adds rosin to modify it, and finally reacts with polyhydric alcohol to generate a rosin-modified phenolic resin. Among them, sulfuric acid, phosphoric acid and other inorganic strong acids are mostly used as catalysts for the condensation rea...

Claims

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Application Information

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IPC IPC(8): C08G8/34
Inventor 黄桂彬
Owner GUANGXI ZHONGCHANG RESIN
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