JPS56125419A - Water absorbent - Google Patents
Water absorbentInfo
- Publication number
- JPS56125419A JPS56125419A JP2798280A JP2798280A JPS56125419A JP S56125419 A JPS56125419 A JP S56125419A JP 2798280 A JP2798280 A JP 2798280A JP 2798280 A JP2798280 A JP 2798280A JP S56125419 A JPS56125419 A JP S56125419A
- Authority
- JP
- Japan
- Prior art keywords
- water
- pva
- graft copolymer
- absorbent
- swell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To improve the water absorptivity and strength at swell of the resulting water absorbent, by partially or completely neutralizing a graft copolymer obtained by grafting a specified amount of a water-soluble unsaturated carboxylic acid onto PVA.
CONSTITUTION: PVA is dissolved in hot water, and onto the PVA is grafted a water-soluble unsaturated carboxylic acid such as acrylic acid, methacrylic acid or maleic acid by using a graft polymerization initiator and, if necessary, a crosslinking agent. Next, the resulting graft copolymer is partially or completely neutralized with an alkali metal hydroxide so that the PVA portion constitutes 1W50wt% of the graft copolymer. After the neutralization the polymer is washed with an alcohol to remove the initiator and the remaining monomer. The water absorbent thus produced has a high strength at swell and therefore destruction of the gel structure when swollen does not occur even when the absorbent is long kept in the water- swollen state.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2798280A JPS56125419A (en) | 1980-03-07 | 1980-03-07 | Water absorbent |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2798280A JPS56125419A (en) | 1980-03-07 | 1980-03-07 | Water absorbent |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56125419A true JPS56125419A (en) | 1981-10-01 |
Family
ID=12236051
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2798280A Pending JPS56125419A (en) | 1980-03-07 | 1980-03-07 | Water absorbent |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56125419A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5416160A (en) * | 1992-06-19 | 1995-05-16 | The Dow Chemical Company | Water-swellable polymers having improved color |
-
1980
- 1980-03-07 JP JP2798280A patent/JPS56125419A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5416160A (en) * | 1992-06-19 | 1995-05-16 | The Dow Chemical Company | Water-swellable polymers having improved color |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
RU2005113227A (en) | HYDROGEL | |
EP0396303A3 (en) | Process for producing and use of maleic acid (co-) polymer salt improved in biodegradability | |
FR2367782B1 (en) | ||
DE3583945D1 (en) | MIXED POLYMER OF AN ALPHA-BETA-UNSATURATED CARBONIC ACID AND METHOD FOR THE PRODUCTION THEREOF. | |
JPS565863A (en) | Aqueous coating composition | |
KR960701909A (en) | Aqueous Polymer Dispersion, Method of Preparation and Its Application to Paint Composition (AQUEOUS POLYMER DISPERSION, METHOD FOR MAKING SAME AND USE THEREOF FOR PREPARING PAINTS) | |
EP0335410A3 (en) | Water swellable resin composition | |
JPS56125419A (en) | Water absorbent | |
JPS56103207A (en) | Preparation of dried high-molecular weight water-soluble polymer | |
JPS5691837A (en) | Absorbing agent | |
GR3019839T3 (en) | Activation of polysaccharide hydrolase | |
EP0754196A4 (en) | Aqueous polymerization processes | |
JPS5590518A (en) | Preparation of starch-polystyrene graft copolymer | |
JPS5691838A (en) | Water absorbing material | |
JPS5443284A (en) | Dope for forming soft contact lens | |
JPS57126811A (en) | Acrylic water-swellable composition | |
JPS5747313A (en) | Preparation of improved vinyl chloride copolymer | |
CA2086582A1 (en) | Resin composition for toner, method of preparing the same and toner | |
JPS5757765A (en) | Remoistening adhesive | |
JPS5774309A (en) | Production of water-soluble bead polymer | |
JPS5763314A (en) | High water-absorption resin | |
JPS5765328A (en) | Water absorbing composition having shape imparting property | |
JPS5462237A (en) | Pressure-sensitive adhesive composition | |
JPS56159225A (en) | Soundproof material composed of hydrogel | |
JPS5622368A (en) | Protective coating composition |