JPS56139580A - Modified polyvinyl alcohol soil conditioner - Google Patents
Modified polyvinyl alcohol soil conditionerInfo
- Publication number
- JPS56139580A JPS56139580A JP4261980A JP4261980A JPS56139580A JP S56139580 A JPS56139580 A JP S56139580A JP 4261980 A JP4261980 A JP 4261980A JP 4261980 A JP4261980 A JP 4261980A JP S56139580 A JPS56139580 A JP S56139580A
- Authority
- JP
- Japan
- Prior art keywords
- polyvinyl alcohol
- soil
- modified polyvinyl
- soil conditioner
- anhydride
- 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.)
- Granted
Links
Abstract
PURPOSE: To provide an inexpensive soil conditioner which can improve air permeability and water retention of soil, consisting of a highly water-absorbing modified polyvinyl alcohol resin obtd. by the reaction of a polymer composed mainly of polyvinyl alcohol with a cyclic acid anhydride.
CONSTITUTION: A cyclic acid anhydride (e.g. maleic anhydride, phthalic anhydride or succinic anhydride) is reacted with a powered polyvinyl alcohol polymer in an anhydrous state in the presence of a compd. selected from a hydroxide, an alkoxide and a salt of a monovalent metal, a tert. amide and a salt of a tert. amine, whereby carboxyl groups can be introduced into the side chains of the polymer by esterification and at the same time diester intermolecular crosslinking is conducted to produce a highly water-absorbing modified polyvinyl alcohol resin. 0.1W1% above resin as a soil conditioner is mixed with soil, whereby air permeability, caking-preventing property, heat retaining properties, water retention, etc. can moderately by imparted to soil.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4261980A JPS56139580A (en) | 1980-03-31 | 1980-03-31 | Modified polyvinyl alcohol soil conditioner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4261980A JPS56139580A (en) | 1980-03-31 | 1980-03-31 | Modified polyvinyl alcohol soil conditioner |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56139580A true JPS56139580A (en) | 1981-10-31 |
JPS6239633B2 JPS6239633B2 (en) | 1987-08-24 |
Family
ID=12641029
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4261980A Granted JPS56139580A (en) | 1980-03-31 | 1980-03-31 | Modified polyvinyl alcohol soil conditioner |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56139580A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5725383A (en) * | 1980-07-21 | 1982-02-10 | Nippon Synthetic Chem Ind Co Ltd:The | Plant growth promotor |
JPS59183630A (en) * | 1983-04-04 | 1984-10-18 | 株式会社クラレ | Culture soil sticking agent for plant culture floor |
JPS6315881A (en) * | 1986-07-08 | 1988-01-22 | Katsuo Orihara | Method for retention of water in soil by using synthetic high-molecular gel |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102478945B1 (en) | 2018-04-25 | 2022-12-19 | 주식회사 히타치하이테크 | Irradiation condition determination method of charged particle beam device, and charged particle beam device |
US20210327048A1 (en) * | 2018-11-08 | 2021-10-21 | Hitachi High-Tech Corporation | Adjusting Method of Charged Particle Beam Device and Charged Particle Beam Device System |
-
1980
- 1980-03-31 JP JP4261980A patent/JPS56139580A/en active Granted
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5725383A (en) * | 1980-07-21 | 1982-02-10 | Nippon Synthetic Chem Ind Co Ltd:The | Plant growth promotor |
JPS621634B2 (en) * | 1980-07-21 | 1987-01-14 | Nippon Synthetic Chem Ind | |
JPS59183630A (en) * | 1983-04-04 | 1984-10-18 | 株式会社クラレ | Culture soil sticking agent for plant culture floor |
JPH0318851B2 (en) * | 1983-04-04 | 1991-03-13 | Kuraray Co | |
JPS6315881A (en) * | 1986-07-08 | 1988-01-22 | Katsuo Orihara | Method for retention of water in soil by using synthetic high-molecular gel |
Also Published As
Publication number | Publication date |
---|---|
JPS6239633B2 (en) | 1987-08-24 |
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