GB485230A - Phenol-aldehyde condensation products - Google Patents
Phenol-aldehyde condensation productsInfo
- Publication number
- GB485230A GB485230A GB8025/37A GB802537A GB485230A GB 485230 A GB485230 A GB 485230A GB 8025/37 A GB8025/37 A GB 8025/37A GB 802537 A GB802537 A GB 802537A GB 485230 A GB485230 A GB 485230A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resoles
- formaldehyde
- alkaline
- dihydroxydiphenylsulphone
- faintly
- 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
- C08G8/28—Chemically modified polycondensates
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
Resoles soluble in weak alkalies to at the most faintly phenolphthalein-alkaline reaction, are made by condensing dihydroxydiarylsulphones with formaldehyde (or substances yielding it) in a concentrated solution the alkalinity of which lies between the neutral point and the beginning of phenolphthaleinalkaline reaction. Fillers may be mixed with aqueous solutions (reacting at most faintly phenolphthalein-alkaline) of the resoles, and the mixture hardened; fillers, e.g. sawdust, may be mixed with the resoles and the mixture dried and hot-pressed, or there may also be added (before or after condensation) aliphatic polyhydric alcohols such as glycol, glycerol or its polymers or condensation products, or dimethylolacetone, the mixtures being then mouldable by cold pressure. Dilute weaklyalkaline aqueous solutions of the resoles may be used for impregnating textiles and wall- and other papers and for after-treating formaldehyde- or chrome-tanned leather. In examples: (1), (2), (3) dihydroxydiphenylsulphone or a sulphone prepared from (2) crude cresol or (3) m-cresol by the process of Specification 471,010 and formaldehyde; (4) dihydroxydiphenylsulphone and paraformaldehyde, are condensed in the presence of caustic alkalies such as caustic soda or potash, of the hydroxides of the alkaline earths, of carbonates such as sodium and potassium carbonates, or of borax or phosphates. German Specification 464,088 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE485230X | 1936-03-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB485230A true GB485230A (en) | 1938-05-17 |
Family
ID=6543253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8025/37A Expired GB485230A (en) | 1936-03-19 | 1937-03-18 | Phenol-aldehyde condensation products |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB485230A (en) |
-
1937
- 1937-03-18 GB GB8025/37A patent/GB485230A/en not_active Expired
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