Preparation method of rosin modified phenolic resin

A technology for modifying phenolic resin and rosin, which is applied in applications, coatings, inks, etc. It can solve the problems of the internal quality of the resin being affected, the viscosity of the resin being difficult to control, and the unfavorable phenolic condensation reaction, so as to overcome the coking tendency and control the resin The effect of high viscosity and operating elasticity

Inactive Publication Date: 2010-05-26
SHANGHAI HUAYI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming of this prior art method is: adopt concentration 37% formaldehyde aqueous solution as raw material in the first step condensation reaction, because the water content in the reaction system is big, be unfavorable for phenolic condensation reaction to carry out, the reaction time is long, needs 10-11 hours; In the production process, the resin viscosity is difficult to control, and material coking often occurs
Sometimes raw rosin must be added in the reaction process to prevent viscosity growth, which not only increases the difficulty of operation, but also affects the internal quality of the resin, resulting in disadvantages in the coating film and ink properties formed by the resin product; and the resin is highly polar and dissolves in oil Poor performance, low tolerance of n-heptane, only 1-2ml / g, viscosity in oil is only 3000-3500mPa·s, which cannot meet the needs of customers

Method used

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  • Preparation method of rosin modified phenolic resin
  • Preparation method of rosin modified phenolic resin
  • Preparation method of rosin modified phenolic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) In a 6-ton reactor, suck 2500 kg of molten rosin, and at 140°C, put 275 kg of tung oil, 932 kg of p-tert-butylphenol, 22 kg of bisphenol A, and 4.8 kg of catalyst magnesium acetate (Shanghai Pudong Haiguang trace element additive factory), 5.0 kilograms of catalyst lime (produced by Shanghai Youyin Building Materials Co., Ltd.), and 280 kilograms of solid formaldehyde with a concentration of 93% were added at 120° C. of temperature. Under alkaline conditions (pH = 8), p-tert-butylphenol, bisphenol A, tung oil and solid formaldehyde with a concentration of 93% are condensed at 115-118°C under the action of catalyst magnesium acetate and catalyst lime. hour, generate the polymer of hydroxymethyl p-tert-butylphenol;

[0032] (2) After the condensation reaction finishes, heat up, polymer and rosin carry out addition reaction at 220 ℃ for 5 hours and 45 minutes, generate the adduct of the polymer of methylol p-tert-butylphenol and rosin;

[0033](3) Then add 240 kg of p...

Embodiment 2

[0035] (1) In a 6-ton reactor, suck 3,400 kilograms of molten rosin, and at 145° C., drop into 285 kilograms of tung oil, 950 kilograms of p-tert-butylphenol, 25 kilograms of bisphenol A, 5.0 kilograms of catalyst magnesium acetate, and 5.5 kilograms of catalyst lime 480 kg of solid formaldehyde with a concentration of 95% was added at a temperature of 123°C. Under alkaline conditions (pH = 8), p-tert-butylphenol, bisphenol A, tung oil and solid formaldehyde with a concentration of 95% are condensed at 116-118°C under the action of catalyst magnesium acetate and catalyst lime 5.5 hour, generate the polymer of hydroxymethyl p-tert-butylphenol;

[0036] (2) After the condensation reaction finishes, heat up, polymer and rosin carry out addition reaction at 220 ℃ for 5 hours and 30 minutes, generate the adduct of the polymer of methylol p-tert-butylphenol and rosin;

[0037] (3) Then add 310 kg of pentaerythritol and 62 kg of glycerin, stir at 220-225°C for 1 hour, then heat up t...

Embodiment 3

[0039] (1) In a 6-ton reactor, suck 4,000 kilograms of molten rosin, and at 148° C., drop into 290 kilograms of tung oil, 940 kilograms of p-tert-butylphenol, 27 kilograms of bisphenol A, 5.4 kilograms of catalyst magnesium acetate, and 5.8 kilograms of catalyst lime 540 kg of solid formaldehyde with a concentration of 94% was added at a temperature of 124°C. Under alkaline conditions (pH = 8), p-tert-butylphenol, bisphenol A, tung oil and solid formaldehyde with a concentration of 94% are condensed at 115-118°C under the action of catalyst magnesium acetate and catalyst lime 6.5 hour, generate the polymer of hydroxymethyl p-tert-butylphenol;

[0040] (2) After the condensation reaction is completed, the temperature is raised, and the polymer and rosin are subjected to an addition reaction at 220° C. for 5 hours and 20 minutes to generate an adduct of a polymer of methylol p-tert-butylphenol and rosin.

[0041] (3) Then add 350 kg of pentaerythritol and 65 kg of glycerin, sti...

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Abstract

The invention relates to a preparation method of a rosin modified phenolic resin. The method comprises the following three steps of reactions: 1. performing condensation of tert-butylphenol, bisphenol A, tung oil and solid formaldehyde under the action of catalyst magnesium acetate and lime to generate polymer of hydroxymethyl tert-butylphenol; 2. performing an addition reaction with rosin to generate an addition product; and 3. performing esterification of the addition product, pentaerythritol and glycerin under the action of catalyst zinc chloride to generate the rosin modified phenolic resin. The preparation method adopts proper raw material proportioning, reaction temperature, reaction time, catalyst and other technical conditions, thus during the production process, the resin viscosity can be effectively controlled, and the operation is simple and flexible and has good effect. The quality of the product is increased, the oil solubility of resin is good, the oil medium viscosity is high, the normal heptane capacity is 4.5ml/g or more; and the prepared paint film ink has good water resistance and alkali resistance, high hardness, excellent anti-after-binding performance, quick-drying performance, lightness and strong adhesive force. Therefore, the preparation method of the invention is applicable to industrial production.

Description

technical field [0001] The invention relates to a production method of rosin modified phenolic resin. Background technique [0002] Rosin modified phenolic resin is mainly used in paint making, printing ink, rubber and other industries. The prepared coating film and printing ink are fast drying, solid and hard, water-resistant, durable and bright. With the further deepening of economic development, products in all walks of life are being upgraded, so people have put forward higher standards for the quality of rosin-modified phenolic resins. There are many domestic manufacturers of rosin-modified phenolic resins, covering all provinces and cities across the country. However, there are not many manufacturers producing brand 2136 rosin modified phenolic resin. The method for their production of 2136 rosin modified resin is basically to use p-tert-butylphenol and formaldehyde to condense under alkaline conditions to generate methylol p- The polymer of tert-butylphenol, the add...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/34C09D161/14C09D11/10C09D11/00C09D11/103
Inventor 马翠萍严爱芳章瑞钢李永生
Owner SHANGHAI HUAYI FINE CHEM CO LTD
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