GB477893A - Process of polishing a formaldehyde resin - Google Patents
Process of polishing a formaldehyde resinInfo
- Publication number
- GB477893A GB477893A GB18836/36A GB1883636A GB477893A GB 477893 A GB477893 A GB 477893A GB 18836/36 A GB18836/36 A GB 18836/36A GB 1883636 A GB1883636 A GB 1883636A GB 477893 A GB477893 A GB 477893A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- polishing
- resin
- formaldehyde
- solution
- 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/02—Chemical treatment or coating of shaped articles made of macromolecular substances with solvents, e.g. swelling agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
A process of polishing a formaldehyde resin, or an article made therefrom, comprises subjection the resin to the action of an aqueous hypochlorite solution which is alkaline. Phenolformaldehyde, urea-formaldehyde and thiourea-formaldehyde resins are mentioned, and suitable specified hypochlorites are those of sodium, potassium and calcium. The solution is preferably used at an elevated temperature, e.g. above 75 DEG C., and a solution containing about 4 per cent hypochlorite and 0,3 per cent to 1 per cent of free alkali is found to give good results. After polishing, the resin may be washed with water or dipped in 1 per cent aqueous sulphuric acid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US477893XA | 1935-08-17 | 1935-08-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB477893A true GB477893A (en) | 1938-01-07 |
Family
ID=21950983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18836/36A Expired GB477893A (en) | 1935-08-17 | 1936-07-07 | Process of polishing a formaldehyde resin |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB477893A (en) |
-
1936
- 1936-07-07 GB GB18836/36A patent/GB477893A/en not_active Expired
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