Title:
METHOD FOR PREPARING UREA FORMALDEHYDE FIBERS VIA CYCLIC ACID-ALKALI PROCESS
Document Type and Number:
WIPO Patent Application WO/2021/018319
Kind Code:
A1
Abstract:
Disclosed is a method for preparing urea formaldehyde fibers via a cyclic acid-alkali process, wherein urea, an aldehyde and an alkali catalyst are added to a polymeric aqueous solution for a reaction, the aldehyde and an acidic catalyst are then added, the alkali catalyst and the remainder of the aldehyde compound are then added, the reaction is finally adjusted to acidic and finished, and solution spinning and thermal curing are performed to obtain urea formaldehyde fibers. The reasonably designed reaction process increases the molecular weight and structural controllability, and improves the spinnability and stability of the spinning solution. The fibers are three-dimensional cross-linked fibers, have advantages such as low costs, flame retardance, heat insulation, non-drip melting and non-toxic burning, and have wide application prospects.
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Inventors:
JIAO MINGLI (CN)
YANG KAI (CN)
DIAO QUAN (CN)
ZHANG XIAOMEI (CN)
JIA WANSHUN (CN)
YIN YUNA (CN)
XI YANJUN (CN)
YANG KAI (CN)
DIAO QUAN (CN)
ZHANG XIAOMEI (CN)
JIA WANSHUN (CN)
YIN YUNA (CN)
XI YANJUN (CN)
Application Number:
PCT/CN2020/118742
Publication Date:
February 04, 2021
Filing Date:
September 29, 2020
Export Citation:
Assignee:
UNIV ZHONGYUAN TECHNOLOGY (CN)
International Classes:
D01F6/78; C08G12/12; D01D5/06
Foreign References:
| CN110359119A | 2019-10-22 | |||
| CN110359116A | 2019-10-22 | |||
| CN110359117A | 2019-10-22 | |||
| US4172057A | 1979-10-23 | |||
| CN1074696A | 1993-07-28 | |||
| CN104558464A | 2015-04-29 | |||
| CN104311767A | 2015-01-28 | |||
| CN103333651A | 2013-10-02 | |||
| CN103804619A | 2014-05-21 |
Attorney, Agent or Firm:
ZHENGZHOU YOUDUN INTELLCTUAL PROPERTY AGENCY CO., LTD. (CN)
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