GB430422A - Improvements in and relating to the manufacture of rubber - Google Patents
Improvements in and relating to the manufacture of rubberInfo
- Publication number
- GB430422A GB430422A GB3527733A GB3527733A GB430422A GB 430422 A GB430422 A GB 430422A GB 3527733 A GB3527733 A GB 3527733A GB 3527733 A GB3527733 A GB 3527733A GB 430422 A GB430422 A GB 430422A
- Authority
- GB
- United Kingdom
- Prior art keywords
- latex
- alkali
- added
- rubber
- approximately
- 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
- C08C1/14—Coagulation
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)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
Soft rubber is obtained from the latex of Hevea brasiliensis by a process which consists in adding a small amount of an alkali to the latex, followed by sufficient acid to effect coagulation. The wet coagulum is then heated in air at a temperature above 70 DEG C. but not materially above 100 DEG C. until dry, and until the required degree of softness is obtained. The alkali which is added may consist of either caustic soda, caustic potash or ammonia. It is essential that the alkaline latex should be coagulated before the addition of any compounding ingredients. The coagulating acid may be added at once or after a lapse of one or more days and before coagulation the latex may be diluted, e.g. to approximately 1/4 lb. dry rubber per gallon. The coagulum may be washed with water, and if desired treated with anti-oxidants. In an example when employing field latex of approximately 3 1/2 lbs. of dry rubber per gallon, a 10 per cent solution of caustic soda is added to give 1/2 per cent of alkali by weight on the latex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3527733A GB430422A (en) | 1933-12-14 | 1933-12-14 | Improvements in and relating to the manufacture of rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3527733A GB430422A (en) | 1933-12-14 | 1933-12-14 | Improvements in and relating to the manufacture of rubber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB430422A true GB430422A (en) | 1935-06-14 |
Family
ID=10375898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3527733A Expired GB430422A (en) | 1933-12-14 | 1933-12-14 | Improvements in and relating to the manufacture of rubber |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB430422A (en) |
-
1933
- 1933-12-14 GB GB3527733A patent/GB430422A/en not_active Expired
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