Preparation method of epoxy chloropropane toughened high-ortho phenolic fiber

A technology of epichlorohydrin and phenolic fibers, applied in the chemical characteristics of fibers, melt spinning, textiles and papermaking, etc., can solve the problems of low tensile strength and poor toughness of phenolic fibers, and achieve fast cross-linking rate and regular structure. , the effect of simple and easy response
CN103469342AInactive Publication Date: 2013-12-25ZHONGYUAN ENGINEERING COLLEGE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHONGYUAN ENGINEERING COLLEGE
Publication Date
2013-12-25
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

A preparation method of an epoxy chloropropane toughened high-ortho phenolic fiber comprises the following steps of heating phenol, methanal, zinc acetate and epoxy chloropropane to boiling for reaction, adding concentrated sulfuric acid for boiling and reaction continuously, washing with high-temperature water, cooling, continuously heating up during pressure reduction and dehydration, obtaining epoxy chloropropane toughened high-ortho phenolic resin, performing melt spinning on the epoxy chloropropane toughened phenolic resin, drawing to form a high-ortho phenolic fiber filament, heating, curing and crosslinking the high-ortho phenolic fiber filament in a coagulating bath containing methanal and HC1, and obtaining the epoxy chloropropane toughened high-ortho phenolic fiber. Compared with the prior art, the method has the advantages of simple and practicable reaction, good spinnability of a stock solution, high curing rate and high mechanical properties.
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Description

technical field

[0001] The invention belongs to the field of preparation of polymer flame-retardant functional fibers, and specifically relates to a preparation method of high-ortho-position phenolic fibers toughened by epichlorohydrin. Background technique

[0002] Phenolic fiber is a three-dimensional cross-linked flame-retardant organic fiber, which was first successfully developed in 1968 by Dr. J. Economy of the American Carborundum Company [US Pat. 3650102]. It was originally planned to be used as a cheap carbon fiber in aerospace, but the test found that the mechanical strength of phenolic carbon fiber was insufficient to meet the needs of aerospace; and its own characteristics such as flame retardancy and ablation resistance promoted the further development of phenolic fiber. The advent of the fiber broke the inherent concept that three-dimensional cross-linked resins cannot be formed into fibers.

[0003] Due to the presence of methylene groups connecting two benze...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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