GB753268A - Process for the preparation of epoxy resins from novolac resins - Google Patents
Process for the preparation of epoxy resins from novolac resinsInfo
- Publication number
- GB753268A GB753268A GB12559/54A GB1255954A GB753268A GB 753268 A GB753268 A GB 753268A GB 12559/54 A GB12559/54 A GB 12559/54A GB 1255954 A GB1255954 A GB 1255954A GB 753268 A GB753268 A GB 753268A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resins
- prepared
- epoxy resins
- novolac
- novolac 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/02—Polycondensates containing more than one epoxy group per molecule
- C08G59/04—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof
- C08G59/06—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols
- C08G59/08—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols from phenol-aldehyde condensates
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Epoxy Resins (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
Abstract
Epoxy resins are prepared by reacting in presence of alkali at a temperature between 60 DEG and 150 DEG C. a novolac resin prepared from a polyhydric phenol (not including a hydrocarbon or chlorine substituted mononuclear polyhydric phenol) and less than the equivalent amount of an aldehyde and at least 3 mols. of epichlorhydrin per phenolic hydroxyl equivalent of the novolac resin. Many phenols and aldehydes are referred to as suitable for making the novolac resin. The epichlorhydrin and novolac resin are mixed and alkali metal hydroxide then added continuously or intermittently to effect condensation. The alkali in amount at least equivalent to the phenolic hydroxyl groups is preferably added gradually as flakes or pellets. A small quantity of water is useful at the commencement of the reaction. Examples (1) and (3) describe the preparation epoxy resins from novolac resins prepared from 2,2 - bis - (4 - hydroxyphenyl) - propane and formaldehyde in presence of oxalic acid. Example (5) uses a novolac prepared from resorcinol and formaldehyde in presence of oxalic acid. Examples (2) and (4) compare glass cloth laminates prepared from resins according to the invention with laminates from conventional epoxy resins. The products of the invention cure with conventional curing agents some of which are mentioned. They may be mixed with fillers, dyes, pigments, plasticizers, and other resins, e.g. other epoxy resins, phenolic, urea or melamine resins.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US753268XA | 1953-05-04 | 1953-05-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB753268A true GB753268A (en) | 1956-07-18 |
Family
ID=22124979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12559/54A Expired GB753268A (en) | 1953-05-04 | 1954-04-30 | Process for the preparation of epoxy resins from novolac resins |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE528539A (en) |
| DE (1) | DE1088711B (en) |
| FR (1) | FR1103811A (en) |
| GB (1) | GB753268A (en) |
| NL (1) | NL187229B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58194916A (en) * | 1982-05-10 | 1983-11-14 | Sumitomo Bakelite Co Ltd | Epoxy resin composition |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE584204A (en) * | 1958-10-31 | |||
| DE1518119C2 (en) * | 1965-01-02 | 1973-10-31 | Reichhold-Albert Chemie Ag, 2000 Hamburg | Process for the preparation of 2 2 bis (phenylene) propane di glycidyl ether |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR960044A (en) * | 1945-09-18 | 1950-04-12 |
-
0
- BE BE528539D patent/BE528539A/xx unknown
- NL NLAANVRAGE7909105,B patent/NL187229B/en unknown
-
1954
- 1954-04-29 FR FR1103811D patent/FR1103811A/en not_active Expired
- 1954-04-30 GB GB12559/54A patent/GB753268A/en not_active Expired
- 1954-05-03 DE DEN8850A patent/DE1088711B/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58194916A (en) * | 1982-05-10 | 1983-11-14 | Sumitomo Bakelite Co Ltd | Epoxy resin composition |
| JPS6244767B2 (en) * | 1982-05-10 | 1987-09-22 | Sumitomo Bakelite Co |
Also Published As
| Publication number | Publication date |
|---|---|
| NL187229B (en) | |
| FR1103811A (en) | 1955-11-07 |
| DE1088711B (en) | 1960-09-08 |
| BE528539A (en) |
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