A kind of preparation method of modified polybenzobisoxazole resin polymer

A benzobisoxazole and polymer technology, which is applied in the field of preparation of modified polybenzobisoxazole resin polymers, can solve problems such as poor operation stability, liquid return, and difficult filtration, and achieve improved fiber uniformity , improved production efficiency and simple preparation process
CN103304817BActive Publication Date: 2015-12-02XUZHOU SILK FIBER TECH
5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XUZHOU SILK FIBER TECH
Publication Date
2015-12-02

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a preparation method of a modified polybenzobisoxazole resin polymer. According to the preparation method, 8-12% of polyphosphoric acid (mass ratio) and 12-18% of phosphorus pentoxide (mass ratio) are added; the molar ratio of the molar sum of the added terephthalic acid and other diacid except the terephthalic acid of the residual mass ratio to 4,6-diamidoresorcinol is 1:1, wherein the molar content of terephthalic acid at least accounts for 80% of the total molar content of diacid; at least one of terephthalic acid and isophthalic acid is used for sure; the non-formic acid diacid is used or not, and the molar content does not exceed 10% of the total molar content of diacid if the non-formic acid diacid is used; and a conventional polybenzobisoxazole resin method is adopted for polymerization. The preparation method disclosed by the invention has the advantages that the strength of the fiber obtained by spinning by use of the polymer provided by the invention can exceed 3GPa, the viscosity of the spinning solution is greatly reduced, the equipment requirements in the spinning process are lowered, and the operation rate and production efficiency of the equipment in a production process are improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a preparation method of a polymer, in particular to a preparation method of a modified polybenzobisoxazole resin polymer. Background technique

[0002] Polyphenylene benzobisoxazole (referred to as PBO) resin has excellent heat resistance and chemical stability, and the fiber obtained by dry spray wet spinning has the characteristics of high strength and high modulus, and is known as the 21st century The super fiber has a wide range of applications.

[0003] The molecular structure of PBO is as follows:

[0004]

[0005] PBO is formed by polycondensation of 4,6-diaminoresorcinol and terephthalic acid in polyphosphoric acid solvent, and the polymerization system is directly used as spinning solution. Extensive research has been done on the spinning process of PBO. In the spinning process, since the concentration of PBO needs to reach more than 10%, the viscosity of the spinning solution is very high. The resulting consequ...

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
Login to View More