GB481069A - Improvements in the process of manufacturing phenol-aldehyde resins or products thereof - Google Patents
Improvements in the process of manufacturing phenol-aldehyde resins or products thereofInfo
- Publication number
- GB481069A GB481069A GB14290/37A GB1429037A GB481069A GB 481069 A GB481069 A GB 481069A GB 14290/37 A GB14290/37 A GB 14290/37A GB 1429037 A GB1429037 A GB 1429037A GB 481069 A GB481069 A GB 481069A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phenol
- acid
- aldehyde
- discolourization
- nitric
- 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
- C08G8/00—Condensation polymers of aldehydes or ketones with phenols only
Abstract
Discolourization of phenol-aldehyde resins or products containing such resins such as lacquers, varnishes, pore-fillers or moulded objects is prevented or neutralized by reacting the liquid condensation product, in the presence or absence of a solvent, first with less than 2 per cent of nitric or nitrous acid or a nitrate or nitrite and an acid or acid salt and then with an aldehyde or amine. Colouring agents are formed which marked the discolourization. In an example, phenol, with or without cresol, is condensed with formalin in the presence of potassium or sodium carbonate or hydroxide and the liquid dehydrated condensation product dissolved in ethyl alcohol is treated first with nitric or nitrous acid and then with furfurol. The solution, together with a hardening agent used at the time of use, is used as a coating.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE481069X | 1936-05-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB481069A true GB481069A (en) | 1938-03-04 |
Family
ID=20310465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB14290/37A Expired GB481069A (en) | 1936-05-26 | 1937-05-22 | Improvements in the process of manufacturing phenol-aldehyde resins or products thereof |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB481069A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2744875A (en) * | 1951-06-14 | 1956-05-08 | Lockheed Aircraft Corp | Cellular phenolic resin materials |
| US2811508A (en) * | 1955-09-22 | 1957-10-29 | Allied Chem & Dye Corp | Condensation of phenol and aldehyde with trichloroacetic acid and production of phenolaldehyde resin free of acid catalyst |
| US2874953A (en) * | 1956-08-20 | 1959-02-24 | Dow Chemical Co | Lining for titanium-contacting apparatus |
-
1937
- 1937-05-22 GB GB14290/37A patent/GB481069A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2744875A (en) * | 1951-06-14 | 1956-05-08 | Lockheed Aircraft Corp | Cellular phenolic resin materials |
| US2811508A (en) * | 1955-09-22 | 1957-10-29 | Allied Chem & Dye Corp | Condensation of phenol and aldehyde with trichloroacetic acid and production of phenolaldehyde resin free of acid catalyst |
| US2874953A (en) * | 1956-08-20 | 1959-02-24 | Dow Chemical Co | Lining for titanium-contacting apparatus |
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