Preparation method of lignin and boron dual-modified phenolic resin and phenolic moulding plastic

A phenolic molding compound, double modification technology, applied in the field of preparation of phenolic resin and phenolic molding compound, can solve the problems of low reactivity, low content, poor toughness of molding compound, etc., achieve excellent mechanical properties, reduce production costs, and good thermal performance

Active Publication Date: 2016-07-13
沙县宏盛塑料有限公司
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  • Abstract
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Problems solved by technology

[0003] As the matrix resin for preparing phenolic molding compound, the performance of phenolic resin plays an important role in the performance of phenolic molding compound and its final products. At present, the matrix resin for preparing phenolic molding compound is mainly ordinary phenolic resin made from phenol and formaldehyde. , the molding compound prepared by using it has defects such as poor toughness and insufficient heat resistance. At the same time, in some special application fields, there are also disadvantages of insufficient mechanical properties and insulation properties.
Patent application number 201210492443.8 discloses a preparation method of lignin and boric acid modified phenolic resin, which utilizes the advantages of low cost of lignin, environme...

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  • Preparation method of lignin and boron dual-modified phenolic resin and phenolic moulding plastic
  • Preparation method of lignin and boron dual-modified phenolic resin and phenolic moulding plastic
  • Preparation method of lignin and boron dual-modified phenolic resin and phenolic moulding plastic

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preparation example Construction

[0017] Specifically, the preparation method of lignin and boron double modified phenolic resin provided by the invention comprises:

[0018] Add lignin, acidic catalyst and phenol into the reaction kettle, heat up to boiling, and reflux for 1-5h;

[0019] Add organic boron compound and aldehyde to the reaction solution, react at 90-110°C for 1-5h, and dehydrate to obtain lignin-boron double-modified phenolic resin.

[0020] Wherein, the lignin is preferably lignosulfonate, alkali lignin, enzymatic lignin, acid lignin or high boiling alcohol lignin. Lignin is a substance with a certain molecular weight. Too much addition will make the prepared phenolic resin too viscous and poor in processing performance. Reasonable selection of lignin addition can not only give full play to the modification effect of lignin on phenolic resin, but also The phenolic resin with good fluidity can be obtained, and the amount of lignin is preferably 1%-50% of the phenol mass, more preferably 10-30%...

Embodiment 1

[0035] 1) Add 25 parts by weight of enzymatic lignin, 1 part by weight of oxalic acid and 100 parts by weight of phenol into the reaction kettle, heat up to boiling, and then reflux for 5 hours;

[0036] 2) Add 10 parts by weight of 2-aminoethyl diphenylboronate and 80 parts by weight of formaldehyde to the reaction solution in step 1), react at 100°C for 5 hours, and dehydrate to obtain double-modified lignin and boron Phenolic Resin.

Embodiment 2

[0038] 1) Add 15 parts by weight of calcium lignosulfonate, 0.9 parts by weight of oxalic acid and 100 parts by weight of phenol into the reaction kettle, heat up to boiling, and then reflux for 3 hours;

[0039] 2) Add 30 parts by weight of L-norvalyl diphenyl borate and 95 parts by weight of formaldehyde solution with a mass concentration of 37% to the reaction solution in step 1), react at 100°C for 2 hours, and then dehydrate A phenolic resin double-modified by lignin and boron is obtained.

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Abstract

The invention relates to a preparation method of lignin and boron dual-modified phenolic resin and phenolic moulding plastic. The preparation method of the phenolic resin includes: adding lignin, an acidic catalyst and phenol into a reaction kettle, performing heating to boiling, and carrying out reflux reaction for 1-5h; adding an organic boron compound and aldehyde into the reaction solution, carrying out reaction at 90-110DEG C for 1-5h, and then performing dehydration to obtain the lignin and boron dual-modified phenolic resin. The preparation method of the phenolic molding plastic comprises the steps of: mixing the lignin and boron dual-modified phenolic resin with other raw materials evenly, and then carrying out plastication, tabletting, cooling and crushing to obtain the phenolic moulding plastic. The lignin and boron dual-modified phenolic resin and the phenolic moulding plastic prepared by the method provided by the invention have more excellent mechanical properties, better heat resistance and flame retardant performance, and better dimensional stability and electrical insulation properties.

Description

technical field [0001] The invention relates to the technical field of polymer synthesis and modification, in particular to a preparation method of a lignin and boron double-modified phenolic resin and a phenolic molding compound. Background technique [0002] Phenolic resin (PF) has rich sources of raw materials, low price, simple production process, excellent mechanical properties, heat resistance, electrical insulation, dimensional stability, molding processability and flame retardancy, good dimensional stability of products, electrical insulation With excellent performance and low smoke emission, it has become an indispensable material in the industrial sector, and has been widely used in related industries such as automobiles, home appliances, electrical appliances, steel and housing. The use of phenolic resin as matrix resin to prepare phenolic molding compound (phenolic resin composite material) is an important application field of phenolic resin, accounting for more ...

Claims

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Application Information

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IPC IPC(8): C08G8/28C08L61/14C08L97/02C08K13/04C08K7/10C08K3/34C08K7/14C08K3/26C08K5/42
CPCC08G8/28C08K3/26C08K3/34C08K5/42C08K7/10C08K7/14C08K13/04C08K2003/265C08L61/14C08L2201/02C08L2201/08C08L2205/16C08L97/02C08K5/07C08K5/10
Inventor 黄世俊罗建峰翟苏宇艾生儿王堂明朱光明乐小英
Owner 沙县宏盛塑料有限公司
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