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Method for producing environment-friendly high-performance novolac resin

The technology of a phenolic resin and a production method is applied in the production field of environment-friendly high-performance thermoplastic phenolic resin, can solve the problems of difficulty in obtaining high ortho thermoplastic resin, difficulty in taking into account the high conversion rate of phenol, etc. The effect of low free phenol content and improved conversion rate

Active Publication Date: 2009-10-28
SHANDONG LAIWU RUNDA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcoming is: because these several kinds of production methods all obtain the thermoplastic phenolic resin of different molecular weight and different molecular weight distribution by adjusting the ratio of phenol and aldehyde, so it is difficult to take into account the high conversion rate of phenol, so that it can be used without water washing And under the condition of exceeding 170°C and high vacuum dehydration, the concentration of free phenol in the obtained resin is ≤1%, and it is difficult to obtain a high-ortho thermoplastic resin with a narrow molecular weight distribution, and the concentration of free phenol in the obtained wastewater is ≥3%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of production method of environment-friendly high-performance thermoplastic phenolic resin, comprises the following steps to complete:

[0018] (1), measure 100 parts of phenol used by weight ratio component, 70 parts of 36% formaldehyde aqueous solution and organic phosphonic acid and its divalent metal salts composite catalyst 1 part, described organic phosphonic acid and its divalent metal The composite catalyst of salt is a mixture of organic phosphate and excess hydroxyethylidene diphosphoric acid generated after the reaction of hydroxyethylidene diphosphoric acid and manganese oxide;

[0019] (2), the composite catalyst of phenol and organic phosphonic acid and divalent metal salts thereof is mixed and stirred evenly;

[0020] (3), heat up, when material temperature is in the range of 50 DEG C, add the measured 36% formaldehyde aqueous solution, when heated to 95 DEG C, heat preservation reaction for 3.5 hours;

[0021] (4) At a temperature of 100°C, dehyd...

Embodiment 2

[0024] A kind of production method of environment-friendly high-performance thermoplastic phenolic resin, comprises the following steps to complete:

[0025] (1), measure 100 parts of o-cresols used by weight ratio components, 1 part of composite catalysts of 60 parts of 50% formaldehyde aqueous solution and organic phosphonic acid and divalent metal salts thereof, described organic phosphonic acid and its two The composite catalyst of valent metal salts is a mixture of organic phosphate and excess aminotrimethylene phosphonic acid generated after the reaction of aminotrimethylene phosphonic acid and zinc oxide;

[0026] (2), mixing and stirring the composite catalyst of o-cresol, organic phosphonic acid and divalent metal salts thereof;

[0027] (3), heating up, when material temperature is in the scope of 50 ℃, add the 50% formaldehyde aqueous solution that measures and take, be heated to 105 ℃, heat preservation reaction 3.5 hours;

[0028] (4) At a temperature of 100°C, d...

Embodiment 3

[0031] A kind of production method of environment-friendly high-performance thermoplastic phenolic resin, comprises the following steps to complete:

[0032] (1), measure 100 parts of mixed phenols of used phenol and o-cresol by weight ratio components, 1 part of composite catalysts of 30 parts of 89% paraformaldehyde and organic phosphonic acid and divalent metal salts thereof; The composite catalyst of organic phosphonic acid and its divalent metal salts is a mixture of organic phosphate and excess hydroxyethylidene diphosphoric acid generated after the reaction of hydroxyethylidene diphosphoric acid and magnesium oxide;

[0033] (2), the mixed phenol of phenol and o-cresol and the composite catalyst of organic phosphonic acid and divalent metal salts thereof are mixed and stirred evenly;

[0034] (3), heating up, when the material temperature is within the range of 50°C, add 89% paraformaldehyde measured, heated to 105°C, and heat preservation reaction for 3.5 hours;

[00...

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Abstract

The invention discloses a method for producing environment-friendly high-performance novolac resin, which is characterized by comprising the following steps: (1) according to weight ratio, weighing 100 portions of phenol, 30 to 70 portions of aldehyde and 1 portion of composite catalyst of organic phosphonic acid and divalent metal salts thereof; (2) mixing and stirring the phenol and the composite catalyst evenly; (3) heating the mixture to raise the temperature, adding the aldehyde when the temperature of the materials is between 50 and 100 DEG C, and when the temperature is raised to be between 80 and 110 DEG C, performing reaction for 0.5 to 4 hours; and (4) performing vacuum dehydration when the temperature is between 80 and 160 DEG C and the pressure is 0.08 MPa below zero, and simultaneously heating the materials by using 0.06MPa steam to obtain the environment-friendly high-performance novolac resin when the softening point of the materials reaches between 75 and 120 DEG C. The method effectively reduces the content of free phenols, improves the conversion rate of the phenol, and is advantageous for the health of production workers and environmental protection.

Description

technical field [0001] The invention relates to a production method of a phenolic resin, in particular to a production method of an environment-friendly high-performance thermoplastic phenolic resin. The environment-friendly high-performance thermoplastic phenolic resin is suitable for casting shell sand, friction materials, abrasive abrasives, Adhesives for materials, sealing materials and other industries. Background technique [0002] Phenolic resin has heat resistance, insulation, high temperature resistance, corrosion resistance and good mechanical processing properties. It can be used in the manufacture of molding compounds, laminated plastics, foam plastics, honeycomb plastics, etc., and can also be used as paint raw materials, adhesives, and anti-corrosion. Clay and phenolic resin-based ion exchange resins can also be used as adhesives for metal casting models of grinding wheels and brake pads. In the defense industry, phenolic resins have also been widely used. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/04C08G8/08C08G8/10C08G8/12
Inventor 吕虎张锋李长彬刘常玉刘卫国乐碧兰吕华
Owner SHANDONG LAIWU RUNDA NEW MATERIAL
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