JPS5785814A - Production of solid urea resin - Google Patents
Production of solid urea resinInfo
- Publication number
- JPS5785814A JPS5785814A JP16108180A JP16108180A JPS5785814A JP S5785814 A JPS5785814 A JP S5785814A JP 16108180 A JP16108180 A JP 16108180A JP 16108180 A JP16108180 A JP 16108180A JP S5785814 A JPS5785814 A JP S5785814A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- urea
- resin
- solid
- urea resin
- 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
- Phenolic Resins Or Amino Resins (AREA)
Abstract
PURPOSE: To shorten the production time, facilitate drying and grinding and obtain a solid urea resin useful as a plasticizer for producing urea resin molding materials, by adding calcined gypsum to a syrup obtained from urea and an aldehyde and cooling the mixture.
CONSTITUTION: Urea is reacted with an aldehyde while the water content of the reaction system is maintained at 13W25wt%. The produced resin syrup is mixed with calcined gypsum and cooled to separate a solid urea resin. The reason why the separation of the solid urea is promoted by adding calcined gypsum to the resin syrup is considered to be that methylolated urea such as dimethylolurea can be rapidly separated because addition of calcined gypsum reduces the free- water content of the system. Moreover, the improved grindability of the solid resin is obtained by the following reasons: the solid urea resin containing gypsum has a lower free-water content than a solid urea resin containing no gypsum, and the lumps can be easily ground because of conversion of calcined gypsum into gypsum.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16108180A JPS5785814A (en) | 1980-11-15 | 1980-11-15 | Production of solid urea resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16108180A JPS5785814A (en) | 1980-11-15 | 1980-11-15 | Production of solid urea resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5785814A true JPS5785814A (en) | 1982-05-28 |
Family
ID=15728257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16108180A Pending JPS5785814A (en) | 1980-11-15 | 1980-11-15 | Production of solid urea resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5785814A (en) |
-
1980
- 1980-11-15 JP JP16108180A patent/JPS5785814A/en active Pending
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