JPS5731439A - Binder for molding sand - Google Patents
Binder for molding sandInfo
- Publication number
- JPS5731439A JPS5731439A JP10759580A JP10759580A JPS5731439A JP S5731439 A JPS5731439 A JP S5731439A JP 10759580 A JP10759580 A JP 10759580A JP 10759580 A JP10759580 A JP 10759580A JP S5731439 A JPS5731439 A JP S5731439A
- Authority
- JP
- Japan
- Prior art keywords
- starch
- binder
- added
- esterified
- molding sand
- 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
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
PURPOSE: To provide a binder which decreases the amount of addition of water content and reduces the time for drying and hardening by adding and mixing a high concn. of a weak acid to and with starch then adding an alkali thereby esterifying the starch at a high degree of substitution.
CONSTITUTION: After a high concn. of a weak acid (monocholoacetic acid) permitting esterification reaction is added to starting material starch, an alkali (NaOH) is added thereto, whereby the esterified starch, (carboxymethyl starch) wherein the starting material starch is esterified at a high degree of substitution is obtained. This esterified starch turns to glue with cold water, and when added with a small amount of water content, it exhibits high binding power and is therefore suitable as a binder for molding sand.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10759580A JPS5731439A (en) | 1980-08-04 | 1980-08-04 | Binder for molding sand |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10759580A JPS5731439A (en) | 1980-08-04 | 1980-08-04 | Binder for molding sand |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5731439A true JPS5731439A (en) | 1982-02-19 |
Family
ID=14463135
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10759580A Pending JPS5731439A (en) | 1980-08-04 | 1980-08-04 | Binder for molding sand |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5731439A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3015188A1 (en) | 2014-10-30 | 2016-05-04 | Akademia Gorniczo-Hutnicza im. Stanislawa Staszica w Krakowie | Moulding sand and a method of curing of moulding sand |
-
1980
- 1980-08-04 JP JP10759580A patent/JPS5731439A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3015188A1 (en) | 2014-10-30 | 2016-05-04 | Akademia Gorniczo-Hutnicza im. Stanislawa Staszica w Krakowie | Moulding sand and a method of curing of moulding sand |
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