JPS55133415A - Preparation of organic, self-curing liquid phenolic resin composition for mold - Google Patents
Preparation of organic, self-curing liquid phenolic resin composition for moldInfo
- Publication number
- JPS55133415A JPS55133415A JP4142979A JP4142979A JPS55133415A JP S55133415 A JPS55133415 A JP S55133415A JP 4142979 A JP4142979 A JP 4142979A JP 4142979 A JP4142979 A JP 4142979A JP S55133415 A JPS55133415 A JP S55133415A
- Authority
- JP
- Japan
- Prior art keywords
- steam
- resin composition
- phenolic resin
- mold
- self
- 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
Landscapes
- Mold Materials And Core Materials (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
PURPOSE: To prepare the title resin having excellent internal curing characteristics, without using organic solvents, while preventing the deposition of the polymer to the inner walls of the reactor, by the heat polycondensation of phenol and formaldehyde in the presence of a catalyst, followed by the flushing with steam and the dehydration treatment.
CONSTITUTION: A resin obtained by the heat polycondensation of phenol and formaldehyde in the presence of a catalyst (e.g. NaOH), is added with water under reduced pressure and with heating to generate a large amount of steam. The steam is flushed, and the resin is dehydrated by heating under reduced pressure while preventing the formation and deposition of an excessively polymerized product to the inner wall of a tube reactor to obtain the objective phenolic resin composition. The dehydration treatment is pref. carried out in a tube having an L/D ratio of ≥1,000.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54041429A JPS5817211B2 (en) | 1979-04-04 | 1979-04-04 | Method for producing liquid phenolic resin composition for organic self-hardening molds |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54041429A JPS5817211B2 (en) | 1979-04-04 | 1979-04-04 | Method for producing liquid phenolic resin composition for organic self-hardening molds |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55133415A true JPS55133415A (en) | 1980-10-17 |
JPS5817211B2 JPS5817211B2 (en) | 1983-04-05 |
Family
ID=12608115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54041429A Expired JPS5817211B2 (en) | 1979-04-04 | 1979-04-04 | Method for producing liquid phenolic resin composition for organic self-hardening molds |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5817211B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5321292A (en) * | 1976-08-10 | 1978-02-27 | Hitachi Chem Co Ltd | Preparation of phenol resin |
-
1979
- 1979-04-04 JP JP54041429A patent/JPS5817211B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5321292A (en) * | 1976-08-10 | 1978-02-27 | Hitachi Chem Co Ltd | Preparation of phenol resin |
Also Published As
Publication number | Publication date |
---|---|
JPS5817211B2 (en) | 1983-04-05 |
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