US 5,473,023 A · Highly water-absorptive fiber

Abstract

A highly water-absorptive fiber formed of a copolymer containing: (a) polymer units from a vinyl monomer having a carboxyl group, some of the carboxyl groups of the polymer units being converted to a Na salt and/or K salt, and (b) polymer units from monomers such as a vinyl monomer having an amino group and a vinyl monomer having a hydroxyl group and an amino group. This highly water-absorptive fiber has high water absorption properties, has almost free from coloring, is excellent physiological saline solution absorption properties and can be produced under usual carding and spinning conditions.

Claims2

Dependent claims

A highly water-absorptive fiber formed of a copolymer containing:

(a) polymer units from a vinyl monomer having a carboxyl group, some of the carboxyl groups of the polymer units being converted to a zinc salt and at least one member selected from the group consisting of a Na salt and a K salt, and
(b) polymer units from a vinyl monomer having a hydroxyl group.

Dependencies are inferred from the claim text.

Facts

Application

08/211,744Filed 13 Apr 1994

Priority

JP 4-24424719 Aug 1992

Granted

5 Dec 1995

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

D01F 6/36
From copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds: comprising unsaturated carboxylic acids or unsaturated…
C08F 220/04
Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof: acids; Metal salts or ammonium salts thereof
D01F
Chemical features in the manufacture of artificial filaments, threads, fibres, bristles or
C08F
Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Highly water-absorptive fiber

Life of this patent

Highly water-absorptive fiber

Life of this patent

Abstract

Claims2