WO1994004725A1 - Highly water-absorbent fiber - Google Patents
Highly water-absorbent fiber Download PDFInfo
- Publication number
- WO1994004725A1 WO1994004725A1 PCT/JP1993/001153 JP9301153W WO9404725A1 WO 1994004725 A1 WO1994004725 A1 WO 1994004725A1 JP 9301153 W JP9301153 W JP 9301153W WO 9404725 A1 WO9404725 A1 WO 9404725A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vinyl monomer
- group
- polymerized units
- salt
- carboxyl group
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/36—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated carboxylic acids or unsaturated organic esters as the major constituent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
Definitions
- the present invention relates to superabsorbent fibers. More specifically, the present invention relates to a superabsorbent fiber suitably used in the field of industrial materials such as sealing materials requiring high water absorbency. Background art
- Japanese Patent Application Laid-Open No. 11-185315 discloses a highly water-absorbent fiber obtained by hydrolyzing acryl fibers to impart high water absorbency.
- hydrolyzing the acrylic fiber has the disadvantage that the fiber is colored and that the water absorption of physiological saline is reduced to about half that of pure water.
- Japanese Patent Application Laid-Open No. 63-159405 discloses a copolymer of a vinyl monomer having a carboxylic acid group and a vinyl monomer having a hydroxyl group which reacts with the carboxylic acid group, and Fibers comprising a copolymer in which a part of carboxylic acid groups form a sodium salt are disclosed.
- the fibers compared to water absorption for pure water, and the degree to which water absorption against saline drops to approximately 2 3, with less of greatly reduced; no.
- the cross-linking reaction between the hydroxyl group and the carboxyl group is slow, and requires a cross-linking reaction at a high temperature of 180 ° C or higher, leading to cost reduction. Disclosure of the invention
- An object of the present invention is to provide a novel superabsorbent fiber. It is another object of the present invention to provide an inexpensive superabsorbent fiber which has high water absorbency, has little coloration in the fiber, has excellent water absorbency against physiological saline, and has good spinnability.
- the carboxyl group forms a Na salt and / or a K salt.
- (b) superabsorbent polymer comprising a polymer having at least one monomer selected from the group consisting of a biel monomer having an amino group and a vinyl monomer having a hydroxyl group and an amino group. This is achieved by a fiber (hereinafter, referred to as a first superabsorbent fiber of the present invention).
- the carboxyl group forms a Na salt and a Z or T or K salt.
- the carboxyl group forms a Na salt and / or a K salt.
- the carboxyl group forms a Na salt and a Z or K salt.
- some of the polymerized units form a Na salt and / or a K salt together with a carboxyl group forming a zinc salt.
- a superabsorbent fiber comprising a copolymer containing a polymerized unit of a vinyl monomer having a hydroxyl group (hereinafter, referred to as a fifth superabsorbent fiber of the present invention).
- the polymerized unit (a) of the vinyl monomer having a carboxyl group is produced by, for example, vinyl polymerizing a vinyl monomer such as acrylic acid, methacrylic acid, and maleic acid. These vinyl monomers can be used alone or in combination of two or more.
- the carboxylic group forms a zinc salt.
- a part of the vinyl monomer having a carboxyl group forms a zinc salt and an Na salt or a zinc salt and a K salt.
- a zinc salt of a vinyl monomer having a carboxyl group can be obtained by reacting a vinyl monomer having a carboxyl group in an acidic side with zinc hydroxide at a low temperature. If the reaction temperature is 30 or higher, one part of polymerization starts, which is not preferable. It is preferable that the polymerization unit derived from the zinc salt is present in the copolymer in an amount of 5 mol% or more.
- Polymerized units in which a part of the carboxyl group forms a salt as described above can be formed by copolymerization, the force of reacting with a carboxyl group by a zinc salt such as zinc chloride, and the ion exchange with another metal salt. Can be formed during polymerization.
- At least one of the Na salt and / or the K salt of a polymerized unit derived from a vinyl monomer having a hydroxyl group is present in the copolymer in a proportion of 15 to 30 mol%. If the amount of these salts is too high, the polymer will be too hygroscopic.
- Polymerized units (including those forming a salt) from a vinyl monomer having a hydroxyl group are preferably present in the copolymer in a proportion of 80 to 98 mol%, and 90 to 9 mol%. More preferably it is present in a proportion of 7 mol%.
- the other polymerized units (b) forming the copolymer are the following four types: o
- polymerized units derived from at least one monomer selected from the group consisting of a vinyl monomer having an amino group and a vinyl monomer having a hydroxyl group and an amino group.
- a polymerization unit of a vinyl monomer having an amino group and a polymerization unit of a vinyl monomer having a hydroxyl group.
- a polymerization unit of a vinyl monomer having an amino group a polymerization unit of a vinyl monomer having a hydroxyl group, and a polymerization unit of a vinyl monomer having an amino group and a hydroxyl group.
- a polymerized unit of a vinyl monomer having a hydroxy group and a vinyl monomer having an amino group and a hydroxy group are used. Polymerized units.
- Preferred examples of the vinyl monomer having an amino group capable of reacting with a carboxyl group include dimethylaminoethyl acrylate and getylaminopropyl acrylate.
- Preferred examples of the vinyl monomer having a hydroxyl group and an amino group capable of reacting with a carboxyl group include 3-((ethylamino) -12-hydroxypyruvate pyracylate).
- Amino groups are preferred because they are easier to react with carboxyl groups than hydroxy groups and are easier to crosslink.
- Monomers having a group capable of reacting with a carboxyl group as described above can be used alone or in combination of two or more.
- the polymer unit derived from the above vinyl monomer having a group capable of reacting with a propyloxyl group is contained in the copolymer in an amount of preferably at least 3 mol%, more preferably at least 5 mol%.
- the polymerization unit of a vinyl monomer having a free carboxyl group is less than 10 mol% or the polymerization unit of the above vinyl mosomer having a group capable of reacting with a carboxyl group is less than 3 mol%, a crosslinked structure is formed. Water insolubility tends to be insufficient.
- the description omitted for the fifth superabsorbent fiber is the same as the first to fourth superabsorbent fibers of the present invention.
- a part of polymerized units of a vinyl monomer having a carboxyl group forms a zinc salt and a Na salt and / or a K salt.
- the zinc salt is present and the degree of crosslinking is appropriate, water absorption can be maintained and moisture absorption can be reduced. Sometimes advantageous.
- the copolymerization method of the copolymer used for the first to fifth superabsorbent fibers of the present invention is not particularly limited.
- a commonly used solution polymerization method is used. Batch polymerization or continuous polymerization may be used.
- As the polymerization initiator generally used peroxides, azo compounds, peroxides and the like are used. If necessary, auxiliary materials such as a polymerization stabilizer and a coloring inhibitor may be used.
- water is used as a solvent. After the polymerization, it is preferable to adjust the viscosity.
- dry spinning is preferred. In wet spinning, agglomeration easily occurs between fibers during drying. After dry spinning by a conventional method, the film is stretched if necessary, and subjected to dry heat treatment to crosslink.
- the dry heat treatment may be carried out at a temperature of at least 120 e C, although the treatment time may be extended to about 8 (TC, but practically it is advantageous to carry out the treatment at 120 e C or more. That is all.
- the first to fifth superabsorbent fibers of the present invention all have excellent high water absorbency, have little coloration of the fibers, have excellent water absorbency in physiological saline, and can be produced under ordinary spinning conditions.
- the superabsorbent fibers of the present invention can be used alone or in combination with other fibers.
- % of the polymerization charge composition is “mol%”, and the other “%” is “wt%”.
- the water absorption of the fiber was measured according to DIN 5 318 14.
- the tensile strength and elongation of the fiber were measured according to JISL1015.
- the moisture absorption is the moisture absorption when left at 20 and 60% RH for 24 hours.
- X-ray fluorescence was used to measure the metals in the fibers. Examples 1 to 10 and Comparative Examples 1 and 2
- Aqueous solution polymerization was carried out at 50 for 2 hours at a monomer composition shown in Table 1, with a total monomer concentration of 10%, potassium persulfate as a polymerization initiator, and potassium carbonate as an auxiliary agent.
- the polymerization rates of all the obtained polymers were 90% or more.
- a conventional method performed dry spinning, after spinning, stretched three times, 1 2 0 e C with nervous heat treatment for 1 minute, to obtain a 3 denier fibers.
- Table 2 shows the water absorption and the mechanical properties of the obtained fiber in physiological saline.
- the fibers obtained in Comparative Examples 1 and 2 had a low degree of crosslinking and were dissolved in water.
- Example 1 the procedure was the same as in Example 1 except that 3 mol% of the 2-hydroxyl virucrirate was changed to 3-(getylamino) 12-hydroxyl virucrirate. To obtain 3 denier fiber. The obtained fiber had a water absorption of 1,180%, a strength of 1.6 gr Zd. An elongation of 11.0%, and a moisture absorption of 14.8%.
- Example 1 3 mol% of 2-hydroxypropyl acrylate was converted to 2 mol% of 3- (dimethylamino) -l-hydroxyl mouth acrylate and 2 mol% of dimethylaminoethyl acrylate. Other than changing, the procedure of Example 1 was repeated to obtain 3-denier fiber. The resulting fiber had a water absorption of 1190%, a strength of 1.6 g rZd, an elongation of 11.3%, and a moisture absorption of 14.3%.
- Example 13 To 2'-hydroxypropyl acrylate 1 mol%, dimethylaminoethyl acrylate 1 mol%, 3- (Jetylamino) 1-2-hydroxypropyl acrylate 1 mol% Otherwise in the same manner as in Example 1, fibers of 3 denier were obtained. The obtained fiber had a water absorption of 1120%, a strength of 1.5 gr d, an elongation of 10.7% and a moisture absorption of 14.2%.
- Example 1 3 mol% of 2-hydroxypropyl acrylate was added to 1-mol% of 2- (dimethylamino) -12-hydroxypropyl acrylate and 2-hydroxypropyl acrylate. 3 denier fiber was obtained in the same manner as in Example 1 except that the amount was changed to 2 mol%. The water absorption of the obtained fiber was 110%, the strength was 1.6 g rZd, the elongation was 11.2%, and the moisture absorption was 14.9%.
- a 3-denier fiber was obtained in the same manner as in Example 1 except that the Na salt was changed to the K salt.
- the obtained fiber has a water absorption of 1 240%, a strength of 1.6 gr Zd, an elongation of 11.2% and a moisture absorption of 16.1%.
- a 3-denier fiber was obtained in the same manner as in Example 1, except that 1 to 2 (mol%) of the Na salt was changed to K salt.
- the resulting fiber had a water absorption of 1,210%, a strength of 1.6 g rZd, an elongation of 10.8%, and a moisture absorption of 15.7%.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Artificial Filaments (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94908115A EP0609464A4 (en) | 1992-08-19 | 1993-08-18 | FIBER WITH HIGH WATER ABSORBING POWER. |
US08/211,744 US5473023A (en) | 1992-08-19 | 1993-08-18 | Highly water-absorptive fiber |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24424792A JP2902870B2 (ja) | 1992-08-19 | 1992-08-19 | 高吸水繊維 |
JP4/244247 | 1992-08-19 | ||
JP5/18043 | 1993-01-09 | ||
JP1804393A JP3154286B2 (ja) | 1993-01-09 | 1993-01-09 | 吸湿性不織布 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994004725A1 true WO1994004725A1 (en) | 1994-03-03 |
Family
ID=26354657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1993/001153 WO1994004725A1 (en) | 1992-08-19 | 1993-08-18 | Highly water-absorbent fiber |
Country Status (4)
Country | Link |
---|---|
US (1) | US5473023A (ja) |
EP (1) | EP0609464A4 (ja) |
CN (1) | CN1090895A (ja) |
WO (1) | WO1994004725A1 (ja) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3517045B2 (ja) * | 1995-10-30 | 2004-04-05 | ユニ・チャーム株式会社 | セルロース−ポリアクリル酸系高保水性繊維、及びその製造法 |
JP4273512B2 (ja) * | 1999-06-28 | 2009-06-03 | 日本エクスラン工業株式会社 | 吸放湿性重合体およびその成形体 |
US9375507B2 (en) | 2013-04-10 | 2016-06-28 | Evonik Corporation | Particulate superabsorbent polymer composition having improved stability |
US9302248B2 (en) | 2013-04-10 | 2016-04-05 | Evonik Corporation | Particulate superabsorbent polymer composition having improved stability |
CN117431652B (zh) * | 2023-12-14 | 2024-03-22 | 江苏康辉新材料科技有限公司 | 一种干法纺丝制备聚丙烯酸纤维的方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63159405A (ja) * | 1986-11-20 | 1988-07-02 | アライド・コロイズ・リミテツド | 吸収性生成物 |
JPS63159440A (ja) * | 1986-11-20 | 1988-07-02 | アライド・コロイズ・リミテツド | 吸収性生成物の製造方法 |
JPH0224361A (ja) * | 1988-05-20 | 1990-01-26 | Allied Colloids Ltd | 吸収性製品及びその製造方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4090013A (en) * | 1975-03-07 | 1978-05-16 | National Starch And Chemical Corp. | Absorbent composition of matter |
JPS5433134A (en) * | 1977-08-16 | 1979-03-10 | Sumitomo Rubber Ind | Covering component for golf ball |
US4295987A (en) * | 1979-12-26 | 1981-10-20 | The Procter & Gamble Company | Cross-linked sodium polyacrylate absorbent |
US4517330A (en) * | 1983-03-30 | 1985-05-14 | Rohm And Haas Company | Floor polish composition having improved durability |
US4604420A (en) * | 1985-03-22 | 1986-08-05 | Polysar Limited | Vulcanizable polymer compositions with improved scorch |
JPH01183515A (ja) * | 1987-12-30 | 1989-07-21 | Japan Exlan Co Ltd | 吸水性高強度繊維 |
JP2635354B2 (ja) * | 1988-03-02 | 1997-07-30 | 住友ゴム工業株式会社 | 変性アイオノマー樹脂の製法 |
-
1993
- 1993-08-18 WO PCT/JP1993/001153 patent/WO1994004725A1/ja not_active Application Discontinuation
- 1993-08-18 EP EP94908115A patent/EP0609464A4/en not_active Withdrawn
- 1993-08-18 US US08/211,744 patent/US5473023A/en not_active Expired - Lifetime
- 1993-08-19 CN CN93118261.1A patent/CN1090895A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63159405A (ja) * | 1986-11-20 | 1988-07-02 | アライド・コロイズ・リミテツド | 吸収性生成物 |
JPS63159440A (ja) * | 1986-11-20 | 1988-07-02 | アライド・コロイズ・リミテツド | 吸収性生成物の製造方法 |
JPH0224361A (ja) * | 1988-05-20 | 1990-01-26 | Allied Colloids Ltd | 吸収性製品及びその製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0609464A4 * |
Also Published As
Publication number | Publication date |
---|---|
US5473023A (en) | 1995-12-05 |
EP0609464A1 (en) | 1994-08-10 |
CN1090895A (zh) | 1994-08-17 |
EP0609464A4 (en) | 1995-08-23 |
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