JPS5448893A - Preparation of phenolic resin - Google Patents
Preparation of phenolic resinInfo
- Publication number
- JPS5448893A JPS5448893A JP11470977A JP11470977A JPS5448893A JP S5448893 A JPS5448893 A JP S5448893A JP 11470977 A JP11470977 A JP 11470977A JP 11470977 A JP11470977 A JP 11470977A JP S5448893 A JPS5448893 A JP S5448893A
- Authority
- JP
- Japan
- Prior art keywords
- phenol compound
- reacted
- phenolic resin
- varnishes
- formaldehyde
- 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
- Phenolic Resins Or Amino Resins (AREA)
Abstract
PURPOSE: To prepare a phenolic resin having improved flexibility withoug lowering the excellent characteristics of the resin, by reacting isopropenylphenol, etc. with dehydrated castor oil, thereafter with a phenol compound, further with formaldehyde.
CONSTITUTION: (A) Isopropenylphenol or its oligomer I or II (n is 0-18) is reacted with (B) dehydrated castor oil in the presence of an acidic catalyst, optionally together with a phenol compound. The product is further reacted with a phenol compound in the presence of an acidic catalyst. A phenolic component containing the above reaction product is reacted with formaldehyde to give the desired phenolic resin.
EFFECT: Varnishes having uniformity and stability are excellent obtained. The varnishes give laminated sheets having improved electrical and mechanical properties, humidity resistance, water resistance and dimensional stability.
USE: Electrical insulating materials, decorative laminated boards, etc.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11470977A JPS603328B2 (en) | 1977-09-26 | 1977-09-26 | Method for producing phenolic resin |
US05/927,780 US4158650A (en) | 1977-08-04 | 1978-07-25 | Process for producing modified phenolic resin |
CA000308710A CA1120187A (en) | 1977-08-04 | 1978-08-03 | Process for producing modified phenolic resin |
DE7878300246T DE2861314D1 (en) | 1977-08-04 | 1978-08-03 | Process for producing modified phenolic resins |
EP78300246A EP0000834B1 (en) | 1977-08-04 | 1978-08-03 | Process for producing modified phenolic resins |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11470977A JPS603328B2 (en) | 1977-09-26 | 1977-09-26 | Method for producing phenolic resin |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5448893A true JPS5448893A (en) | 1979-04-17 |
JPS603328B2 JPS603328B2 (en) | 1985-01-28 |
Family
ID=14644652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11470977A Expired JPS603328B2 (en) | 1977-08-04 | 1977-09-26 | Method for producing phenolic resin |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS603328B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0126625A2 (en) * | 1983-05-18 | 1984-11-28 | Sumitomo Chemical Company, Limited | Method for the production of phenolic compounds and resins |
-
1977
- 1977-09-26 JP JP11470977A patent/JPS603328B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0126625A2 (en) * | 1983-05-18 | 1984-11-28 | Sumitomo Chemical Company, Limited | Method for the production of phenolic compounds and resins |
Also Published As
Publication number | Publication date |
---|---|
JPS603328B2 (en) | 1985-01-28 |
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