JPS5779038A - Binder for molding sand - Google Patents
Binder for molding sandInfo
- Publication number
- JPS5779038A JPS5779038A JP15357680A JP15357680A JPS5779038A JP S5779038 A JPS5779038 A JP S5779038A JP 15357680 A JP15357680 A JP 15357680A JP 15357680 A JP15357680 A JP 15357680A JP S5779038 A JPS5779038 A JP S5779038A
- Authority
- JP
- Japan
- Prior art keywords
- binder
- compound
- molding sand
- breakability
- improved
- 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 obtain a binder for molding sand which has a long usable time and no casting defects and which is improved in the breakability of the sand mold, by adding an organic polyisocyanate compound, a polyol compound, and an alkylated phenol compound to the basic substance.
CONSTITUTION: This binder for molding sand is prepared by adding three components of an organic polyisocyanate compound, a polyol compound, such as propylene glycol, and an alkylated phenol compound selected from a group composed of alkyl phenol and a reaction product of alkyl phenol with formaldehyde to the basic substance. This binder has a long usable life and, moreover, when a catalyst, such as cobalt naphthenate is added, the usable life, strength developing speed after hardening, etc., of the binder can be controlled easily. Since nitrogen is contained in the binder in a very small amount, occurrences of casting defects, such as blow hole, are eliminated. In addition to the above, the breakability of sand mold at the time when casted products are taken out are also improved.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15357680A JPS5779038A (en) | 1980-10-31 | 1980-10-31 | Binder for molding sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15357680A JPS5779038A (en) | 1980-10-31 | 1980-10-31 | Binder for molding sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5779038A true JPS5779038A (en) | 1982-05-18 |
Family
ID=15565503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15357680A Pending JPS5779038A (en) | 1980-10-31 | 1980-10-31 | Binder for molding sand |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5779038A (en) |
-
1980
- 1980-10-31 JP JP15357680A patent/JPS5779038A/en active Pending
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