JPS57198721A - Production of solid urea resin - Google Patents
Production of solid urea resinInfo
- Publication number
- JPS57198721A JPS57198721A JP8329781A JP8329781A JPS57198721A JP S57198721 A JPS57198721 A JP S57198721A JP 8329781 A JP8329781 A JP 8329781A JP 8329781 A JP8329781 A JP 8329781A JP S57198721 A JPS57198721 A JP S57198721A
- Authority
- JP
- Japan
- Prior art keywords
- reaction
- urea resin
- solid urea
- methanol
- conducted
- 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: The reaction between urea and an aldehyde is conducted so that the water content in the reaction system is set to a specific level and methanol is added right before the completion of the reaction, then rapid dehydration is effected under vacuum to produce a solid urea resin of good handlability, because it is a fine powder.
CONSTITUTION: The reaction between urea and formaldehyde such as formalin of 37% concentration or parafomaldehyde is conducted so that the water content is kept at 13W25wt% in the reaction system. Then, a substance forming an azeotropic mixture with water and boiling at a lowest temperature such as methanol is added the reaction mixture right before completion of the reaction preferably by about 30wt% and the resultant mixture is dried by dehydration under vacuum to produce the objective solid urea resin of fine particles.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8329781A JPS57198721A (en) | 1981-05-29 | 1981-05-29 | Production of solid urea resin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8329781A JPS57198721A (en) | 1981-05-29 | 1981-05-29 | Production of solid urea resin |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57198721A true JPS57198721A (en) | 1982-12-06 |
Family
ID=13798458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8329781A Pending JPS57198721A (en) | 1981-05-29 | 1981-05-29 | Production of solid urea resin |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57198721A (en) |
-
1981
- 1981-05-29 JP JP8329781A patent/JPS57198721A/en active Pending
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