GB1293176A - Rubber latex preservation - Google Patents
Rubber latex preservationInfo
- Publication number
- GB1293176A GB1293176A GB5937969A GB5937969A GB1293176A GB 1293176 A GB1293176 A GB 1293176A GB 5937969 A GB5937969 A GB 5937969A GB 5937969 A GB5937969 A GB 5937969A GB 1293176 A GB1293176 A GB 1293176A
- Authority
- GB
- United Kingdom
- Prior art keywords
- latex
- weight
- addition
- urea
- ammonia
- 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
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C1/00—Treatment of rubber latex
- C08C1/02—Chemical or physical treatment of rubber latex before or during concentration
- C08C1/06—Preservation of rubber latex
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)
- Compositions Of Macromolecular Compounds (AREA)
- Tires In General (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
1293176 Preserving latex RUBBER RESEARCH INSTITUTE OF MALAYA 1 Dec 1970 [4 Dec 1969] 59379/69 Heading C3E A method of preserving field latex of Hevea, either diluted or undiluted, from coagulation, comprises maintaining the pH of the latex at a value of at least 8, preferably 8À5 to 9À5, by the repeated addition thereto of a nitrogenous base or by a single or repeated addition thereto of urea or by making at least one addition thereto of a nitrogenous base and at least one addition of urea. The nitrogenous base is preferably ammonia but an organic amine is also suitable. The pH of the latex is preferably maintained at a pH of about 9, e.g. 8À5 to 9À5. The initial concentration of ammonia may be 0À05-0À1% by weight of the latex and the total weight of ammonia that is added incrementally over the period until the pH stabilizes may be 0À3- 0À5% by weight. The addition of 0À5-2À0% by weight of urea is sufficient to make further incremental additions of ammonia after the initial pH adjustment unnecessary. Alternatively if urea is used alone an amount in the range 2À0-4À0% by weight is suitable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5937969A GB1293176A (en) | 1969-12-04 | 1969-12-04 | Rubber latex preservation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5937969A GB1293176A (en) | 1969-12-04 | 1969-12-04 | Rubber latex preservation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1293176A true GB1293176A (en) | 1972-10-18 |
Family
ID=10483648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5937969A Expired GB1293176A (en) | 1969-12-04 | 1969-12-04 | Rubber latex preservation |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1293176A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7989546B2 (en) | 2007-03-07 | 2011-08-02 | Beneo-Orafti S.A. | Natural rubber latex preservation |
-
1969
- 1969-12-04 GB GB5937969A patent/GB1293176A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7989546B2 (en) | 2007-03-07 | 2011-08-02 | Beneo-Orafti S.A. | Natural rubber latex preservation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |