GB488184A - Process for the production of phenol-formaldehyde condensation products - Google Patents
Process for the production of phenol-formaldehyde condensation productsInfo
- Publication number
- GB488184A GB488184A GB26355/36A GB2635536A GB488184A GB 488184 A GB488184 A GB 488184A GB 26355/36 A GB26355/36 A GB 26355/36A GB 2635536 A GB2635536 A GB 2635536A GB 488184 A GB488184 A GB 488184A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grams
- minutes
- formaldehyde
- added
- per cent
- 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
- C08G8/32—Chemically modified polycondensates by organic acids or derivatives thereof, e.g. fatty oils
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Abstract
Refers to multi-stage processes in which, in the final stage, a reaction mixture composed of 1 mol. of phenol to 2,2-3 mols. of formaldehyde is heated in so strongly alkaline a solution that the condensation product remains in solution, which solution is then neutralized or weakly over-acidulated and the entire batch or the separated resin distilled and hardened, and consists in conducting at least one pre-final stage with 1 mol. of phenol to about 1 to not more than 2 mols. of formaldehyde, also under such strongly alkaline conditions that the resin does not separate. In examples: (1) 100 grams of crystallized carbolic acid is heated under reflux for 20 minutes with 100 grams of 30 per cent formaldehyde and 21 grams of double normal caustic soda; 195 grams of 30 per cent formaldehyde are then added and heating continued for 40 minutes after which there are added 5 grams of phthalic acid dissolved in 20 grams of glycerine and the resin is isolated by distillation under vacuum; (2) 100 grams of crystallized carbolic acid are heated under reflux for 10 minutes with 310 grams of 30 per cent formaldehyde and 45 grams of double normal caustic potash, 50 grams of carbolic acid are added and heating continued for 15 minutes, then 85 grams of 30 per cent formaldehyde are added and heating continued for a further 15 minutes after which 65 c.cs. of double normal lactic acid are added followed by vacuum distillation. Other phenols and aldehydes or their polymers may be employed; also other bases, e.g. strong organic bases. Specifications 267,901 and 290,963, [both in Class 2 (iii)], are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT488184X | 1935-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB488184A true GB488184A (en) | 1938-06-29 |
Family
ID=3675078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26355/36A Expired GB488184A (en) | 1935-10-07 | 1936-09-29 | Process for the production of phenol-formaldehyde condensation products |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB488184A (en) |
-
1936
- 1936-09-29 GB GB26355/36A patent/GB488184A/en not_active Expired
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