Process for producing purified polysaccharide fibers, purified polysaccharide fibers and tires

Patent metadata

Field	Value
Publication number	US-2016168757-A1
Application number	US-201414892246-A
Country	US
Kind code	A1
Filing date	May 21, 2014
Priority date	May 21, 2013
Publication date	Jun 16, 2016
Grant date	—

Abstract

A process for producing purified polysaccharide fiber of the present invention includes bringing a polysaccharide solution, which is obtained by dissolving a polysaccharide raw material in a liquid containing an ionic liquid, into contact with a solidification liquid containing an ionic liquid, and performing dry-wet spinning on polysaccharide, in which the concentration of the ionic liquid in the solidification liquid is 0.4% by weight to 70% by weight, and a distance D from a site where the polysaccharide solution is extruded in the form of fiber to a site where the extruded polysaccharide solution comes into contact with the solidification liquid is 50 mm to 120 mm.

First claim

1 . A process for producing purified polysaccharide fiber, comprising:
bringing a polysaccharide solution, which is obtained by dissolving a polysaccharide raw material in a liquid containing an ionic liquid, into contact with a solidification liquid containing an ionic liquid; and performing dry-wet spinning on polysaccharide, wherein the concentration of the ionic liquid in the solidification liquid is 0.4% by weight to 70% by weight, and a distance D from a site where the polysaccharide solution is extruded in the form of fiber to a site where the extruded polysaccharide solution comes into contact with the solidification liquid is 50 mm to 120 mm.

2 . The process for producing purified polysaccharide fiber according to claim 1 ,
wherein the concentration of the ionic liquid in the solidification liquid is 20% by weight to 40% by weight.

3 . The process for producing purified polysaccharide fiber according to claim 1 ,
wherein each of the ionic liquid in the polysaccharide solution and the ionic liquid in the solidification liquid is composed of a cationic portion and an anionic portion, and the anionic portion contains one or more kinds of ions selected from the group consisting of a phosphinate ion represented by the following Formula (C2), a phosphate ion, and a phosphonate ion,

[in the formula, each of X 1 and X 2 independently represents a hydrogen atom, a hydroxyl group, or an alkoxy group having 1 to 4 carbon atoms].

4 . The process for producing purified polysaccharide fiber according to claim 3 ,
wherein the cationic portion is an imidazolium ion represented by the following Formula (C1),

[in the formula, R 1 represents an alkyl group having 1 to 4 carbon atoms or an alkenyl group having 2 to 4 carbon atoms; R 2 represents a hydrogen atom or a methyl group; and R 3 represents an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms].

5 . The process for producing purified polysaccharide fiber according to claim 1 ,
wherein and/or of the ionic liquid in the polysaccharide solution and the ionic liquid in the solidification liquid are 1-ethyl-3-methylimidazolium diethylphosphate.

6 . Purified polysaccharide fiber produced by the process for producing purified polysaccharide fiber according to claim 1 .

7 . A tire using a fiber-rubber complex obtained by combining the purified polysaccharide fiber according to claim 6 with a rubber material.

Assignees

• Bridgestone Corp

Inventors

• Sugimoto Kenichi
• Koide Mitsuharu

Classifications

• B29C47/8895

  Operations & Transport · mapped topic

• B29K2005/00

  Use of polysaccharides or derivatives as moulding material · CPC title

• C08L2205/16

  Fibres; Fibrils · CPC title

• B29L2031/731

  Filamentary material, i.e. comprised of a single element, e.g. filaments, strands, threads, fibres (cables B29L2031/707) · CPC title

• D01D5/06

  Wet spinning methods {(D01D5/0046 takes precedence)} · CPC title