Claims
- 1. A basic gas absorptive and releasing fiber which comprises a crosslinked acrylic fiber prepared from an acrylonitrile polymer and has a 1.0-8.0% by weight increase in nitrogen content due to crosslinking by hydrazine, there being introduced carboxylic acid in an amount of 2.0-6.0 m mol/g into a part of the remaining nitrile groups and being introduced amido groups into the remainder of the remaining nitrile groups, and the tensile strength of said fiber is 1 g/d or more.
- 2. A process for producing the fiber of claim 1, which comprises subjecting an acrylic fiber to treatment with hydrazine to introduce crosslinking bonds so that the increase in the nitrogen content is 1.0-8.0% by weight, and then subjecting the fiber to hydrolysis so that carboxylic acid is introduced in an amount of 2.0-6.0 m/mol/g into the remaining nitrile groups and amido groups are introduced into the remainder of the remaining nitrile groups.
- 3. The fiber as claimed in claim 1, which has a congo red dichroism ratio greater than 0.4, and ammonia absorbability of 30-100 g of ammonia per kg of fiber weight.
Priority Claims (1)
Number |
Date |
Country |
Kind |
7-021306 |
Jan 1995 |
JPX |
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Parent Case Info
This application is a continuation of Ser. No. 08/573,140 filed Dec. 15, 1995, now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5292827 |
Tanaka et al. |
Mar 1994 |
|
Foreign Referenced Citations (2)
Number |
Date |
Country |
1-299624 |
Dec 1989 |
JPX |
5-132858 |
May 1993 |
JPX |
Non-Patent Literature Citations (1)
Entry |
Database WPI, Section Ch, Derwent Publications Ltd., London; Class A14, AN 72-73385T XP002019467 & SU-A-332 148 (Dorokhina is Zverev MP BA) *abstract* Nov. 1972. |
Continuations (1)
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Number |
Date |
Country |
Parent |
573140 |
Dec 1995 |
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