Preparation method for vegetable oil modified rosin phenolic resin

A technology for modifying rosin phenolic resin and vegetable oil, which can be used in inks, household utensils, applications, etc. It can solve the problems of good solubility and high viscosity, and achieve good solubility, high softening point, and high viscosity.

Active Publication Date: 2015-10-28
桂林兴松林化有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a long time, rosin-modified phenolic resins were mainly modified with single alkylphenols, such as dodecylphenol, nonylphenol, p-tert-octylphenol, p-

Method used

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  • Preparation method for vegetable oil modified rosin phenolic resin
  • Preparation method for vegetable oil modified rosin phenolic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1) Put rosin into the reaction kettle, raise the temperature to 180°C, add soybean oil, the weight ratio of rosin to soybean oil is 100:5, continue to heat up to 210°C and keep it warm for 1 hour to carry out the addition reaction;

[0014] 2) Add pentaerythritol and magnesium oxide to the reaction kettle, the molar ratio of rosin to pentaerythritol is 1:1.1, cool down to 160°C, and add dodecylphenol and p-tert-butyl in a molar ratio of 1:1.01 Phenol, then continue to cool down to 120°C, then add paraformaldehyde at a ratio of phenol-formaldehyde molar ratio of 1:2.0, and keep warm at this temperature for 2 hours;

[0015] 3) Raise the temperature in the reactor to 260° C. and keep warm to carry out esterification reaction until the acid value is less than 25 mgKOH / g, and distill off the low boilers under reduced pressure to obtain the vegetable oil modified rosin phenolic resin.

Embodiment 2

[0017] 1) Put rosin into the reaction kettle, heat up to 180°C, add linseed oil, the weight ratio of rosin to linseed oil is 100:30, continue to heat up to 215°C and keep it warm for 1.5h to carry out the addition reaction;

[0018] 2) Add pentaerythritol and magnesium oxide to the reaction kettle, the molar ratio of rosin to pentaerythritol is 1:1.3, cool down to 170°C, and add dodecylphenol and p-tert-butyl in a molar ratio of 1:1.03 Phenol, then continue to cool down to 130°C, then add paraformaldehyde at a ratio of phenol-formaldehyde molar ratio of 1:2.1, and keep warm at this temperature for 2.5h;

[0019] 3) Raise the temperature in the reactor to 270° C. and keep warm to carry out esterification reaction until the acid value is less than 25 mgKOH / g, and distill off low boilers under reduced pressure to obtain vegetable oil modified rosin phenolic resin.

Embodiment 3

[0021] 1) Put rosin into the reaction kettle, heat up to 180°C, add castor oil, the weight ratio of rosin to castor oil is 100:20, continue to heat up to 213°C and keep it warm for 1.3h to carry out the addition reaction;

[0022] 2) Add pentaerythritol and magnesium oxide to the reaction kettle, the molar ratio of rosin to pentaerythritol is 1:1.2, cool down to 165°C, and add dodecylphenol and p-tert-butyl in a molar ratio of 1:1.02 Phenol, then continue to cool down to 125°C, then add paraformaldehyde at a ratio of phenol-formaldehyde molar ratio of 1:2.05, and keep warm at this temperature for 2.2h;

[0023] 3) Raise the temperature in the reactor to 265° C. and keep warm to carry out esterification reaction until the acid value is less than 25 mgKOH / g, and distill off low boilers under reduced pressure to obtain vegetable oil modified rosin phenolic resin.

[0024] The resin of embodiment 1~3 is compared with existing resin as follows:

[0025]

[0026]

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Abstract

The invention provides a preparation method for vegetable oil modified rosin phenolic resin. The preparation method comprises the following steps of firstly, feeding rosin into a reaction kettle, raising the temperature to be 180DEG C, adding vegetable oil, continuously raising the temperature to be 210 to 215DEG C and keeping the temperature for 1 to 1.5 hours, and carrying out addition reaction; secondly, feeding pentaerythritol and magnesium oxide into the reaction kettle, reducing the temperature to be 160 to 170DEG C, feeding dodecylphenol and p-tert-butylphenol according to the mole ratio of 1:1.01 to 1.03, then continuously reducing the temperature to be 120 to 130DEG C, feeding paraformaldehyde according to the mole ratio of phenol to aldehyde being 1:2.0 to 2.1, and keeping the temperature for 2 to 2.5 hours; thirdly, raising the temperature in the reaction kettle to be 260 to 270DEG C, keeping the temperature, carrying out esterification reaction until an acid value is smaller than 25mgKOH/g, and carrying out reduced pressure distillation to obtain a low-boiling-point substance, namely the vegetable oil modified rosin phenolic resin. The resin prepared by the preparation method provided by the invention has the advantages of high viscosity, good solubility, high molecular weight, uniformity in distribution and suitability for offset lithography of ink.

Description

technical field [0001] The invention relates to a preparation method of modified rosin resin, in particular to a preparation method of vegetable oil modified rosin phenolic resin. Background technique [0002] The resin used in lithographic offset printing ink is mainly rosin-modified phenolic resin. The processing technology is to carry out condensation reaction of alkylphenol and formaldehyde under the action of basic catalyst, then carry out addition reaction with abietic acid, and then add polyol and rosin The carboxyl group undergoes an esterification reaction, and finally generates a polymer product. Due to the characteristics of the printing process of traditional offset lithographic inks, the binder requires low acid value, high viscosity, structural / high elasticity and high mineral oil tolerance (usually expressed in n-heptane tolerance). For a long time, rosin-modified phenolic resins were mainly modified with single alkylphenols, such as dodecylphenol, nonylpheno...

Claims

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Application Information

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IPC IPC(8): C08G8/34C08G8/32C08G8/12C09D11/103
Inventor 黄红秀佘锡梅范辂张斌锋
Owner 桂林兴松林化有限责任公司
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