GB739750A - Improvements in or relating to high grade rubber and method of making same - Google Patents
Improvements in or relating to high grade rubber and method of making sameInfo
- Publication number
- GB739750A GB739750A GB734/54A GB73454A GB739750A GB 739750 A GB739750 A GB 739750A GB 734/54 A GB734/54 A GB 734/54A GB 73454 A GB73454 A GB 73454A GB 739750 A GB739750 A GB 739750A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coagulum
- rubber
- treating
- aqueous solution
- hydroxide
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C3/00—Treatment of coagulated rubber
- C08C3/02—Purification
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
High-grade rubber is produced from the skin obtained in creaming natural rubber latex by allowing the said skim to coagulate spontaneously finely dividing the resulting coagulum, and treating the finely divided coagulum with an aqueous alkali metal hydroxide solution or ammonium hydroxide solution. The skim may be clarified by centrifuging or filtering before coagulation occurs. The coagulum may be finely divided by milling to form a wet crumb, and soaked for 20 hours in a 2.75 per cent aqueous solution of sodium hydroxide. Alternatively, the crumb may be heated at 122 DEG F. for about four hours in a 2 per cent aqueous solution of sodium hydroxide and then allowed to soak overnight. A rubber having improved ageing properties is obtained by treating the wet coagulum with an aqueous solution of alkaline earth metal hydroxide, e.g. calcium hydroxide, before treating with an alkali metal or ammonium hydroxide solution. A known anti-oxidant may be incorporated in the rubber so obtained.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US739750XA | 1953-10-02 | 1953-10-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB739750A true GB739750A (en) | 1955-11-02 |
Family
ID=22116947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB734/54A Expired GB739750A (en) | 1953-10-02 | 1954-01-11 | Improvements in or relating to high grade rubber and method of making same |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB739750A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014069979A1 (en) * | 2012-10-29 | 2014-05-08 | Sime Darby Malaysia Berhad | An improved method of recovering rubber from skim natural rubber latex |
-
1954
- 1954-01-11 GB GB734/54A patent/GB739750A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014069979A1 (en) * | 2012-10-29 | 2014-05-08 | Sime Darby Malaysia Berhad | An improved method of recovering rubber from skim natural rubber latex |
| CN104903355A (en) * | 2012-10-29 | 2015-09-09 | 森达美马来西亚有限公司 | An improved method of recovering rubber from skim natural rubber latex |
| CN104903355B (en) * | 2012-10-29 | 2016-11-23 | 森达美马来西亚有限公司 | The improved method of rubber is reclaimed from the clear natural rubber latex of glue |
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