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Preparation method of single-component high-ortho-position-content thermosetting phenolic resin used for extrusion

A phenolic resin, high ortho position technology, applied in the field of preparation of single-component high ortho position thermosetting phenolic resin for pultrusion, can solve the problems of limited application of phenolic resin, complex molding process, short storage period, etc., to promote the development of the industry , The preparation method is simple and effective, and the curing speed is fast.

Active Publication Date: 2017-03-15
洛阳双瑞橡塑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The phenolic resins prepared by conventional methods have defects such as long curing time, short storage period, acid curing, high temperature and high pressure, and complicated molding process, which severely limit the application of phenolic resins in the field of pultruded FRP.

Method used

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  • Preparation method of single-component high-ortho-position-content thermosetting phenolic resin used for extrusion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] free phenol Solid content gel time calorific value viscosity ortho-pair ratio GY-03 11.55% 82.65% 104s 24 MJ / kg 2775 mPa.S 1.89

Embodiment 2

[0032] free phenol Solid content gel time calorific value viscosity ortho-pair ratio GY-07 12.14% 76.56% 74s 26 MJ / kg 2435 mPa.S 1.80

Embodiment 3

[0034] free phenol Solid content gel time calorific value viscosity ortho-pair ratio GY-06 11.97% 78.25% 85s 26 MJ / kg 2034 mPa.S 1.84

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Abstract

The invention discloses a preparation method of a single-component high-ortho-position-content thermosetting phenolic resin used for extrusion, and belongs to the field of phenolic resin preparation method. The preparation method comprises following steps: complete pyrolysis of paraformaldehyde is carried out so as to obtain a formaldehyde solution; a certain amount of acetic acid is added, phenol and zinc oxide are added to control pH value of an obtained reaction liquid to be 5 to 7, and reaction is carried out for 120 to 180min at 80 to 95 DEG C; other aldehyde raw materials and an alkali catalyst are added for reaction; when the Abbe refractive index of an obtained mixed reaction liquid ranges from 1.460 to 1.470, temperature is reduced to 50 to 70 DEG C quickly, a mixed phenol composed of resorcinol, metacresol, and 3,5-xylenol is added for reaction; vacuum dehydration is carried out, an auxiliary material is delivered into a reaction still, and discharging is carried out after viscosity adjusting so as to obtain a finished product. The single-component high-ortho-position-content thermosetting phenolic resin used for extrusion is friendly to the environment, is low in curing temperature, high in curing speed, long in storage duration, high in product strength, stable in performance, and excellent in comprehensive properties; and no bubble is generated in curing.

Description

technical field [0001] The invention relates to a method for preparing a thermosetting phenolic resin in the field of polymer chemistry, in particular to a method for preparing a single-component high-ortho thermosetting phenolic resin for pultrusion. Background technique [0002] Thermosetting phenolic resin is a liquid resin with a certain molecular mass and a certain viscosity obtained by adding and condensing phenol and formaldehyde under alkaline conditions and controlling a certain degree of reaction. According to the chemical structure and monomer functionality of the selected raw materials, the molar ratio of phenol to aldehyde, reaction time and temperature and other technological conditions, phenolic resins for different purposes can be prepared. The phenolic resin prepared by the conventional method at present has defects such as long curing time, short storage period, acid curing, or high temperature and high pressure to cure, and complicated molding process, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/24C08G8/10C08G8/22
CPCC08G8/10C08G8/22C08G8/24
Inventor 刘强张兴刚
Owner 洛阳双瑞橡塑科技有限公司
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