GB635336A - Improvements in or relating to a method of forming synthetic rubber and the product resulting therefrom - Google Patents
Improvements in or relating to a method of forming synthetic rubber and the product resulting therefromInfo
- Publication number
- GB635336A GB635336A GB18052/47A GB1805247A GB635336A GB 635336 A GB635336 A GB 635336A GB 18052/47 A GB18052/47 A GB 18052/47A GB 1805247 A GB1805247 A GB 1805247A GB 635336 A GB635336 A GB 635336A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per
- pressure
- lbs
- per cent
- synthetic rubber
- 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
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F36/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F36/02—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F36/04—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
Landscapes
- 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
Synthetic rubber is obtained by mixing butadiene with styrene, a derivative thereof or acrylonitrile and a polymerization catalyst, heating the mixture under agitation in aqueous emulsion in a closed zone to 36-40 DEG C. to create a pressure of the order of 45 lbs. per sq. in. and maintaining the mixture within that temperature range until the pressure has dropped to zero. Normally, the ratio of butadiene to olefinic compound is within the limits 3 : 1 and 1 : 3. Potassium persulphate is the preferred catalyst, but sodium and ammonium persulphates are also specified. Higher yields are obtained if to the reaction mixture is added 22 per cent of cyclohexane and at least 2 per cent of sodium hydroxide based on the weight of the monolefinic compound, and preferably also a soap solution. On preparing such an emulsion a pressure of 27 lbs. per sq. in. is produced on enclosing it and polymerization is carried out by heating to 36-40 DEG C., when the required pressure of 45 lbs. per sq. in. is obtained. The latex obtained may be coagulated by acids, e.g. 15 per cent hydrochloric acid. Specification 18054/44 (as open to inspection under Sect. 91) is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US635336XA | 1943-09-24 | 1943-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB635336A true GB635336A (en) | 1950-04-05 |
Family
ID=22049852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18052/47A Expired GB635336A (en) | 1943-09-24 | 1944-09-21 | Improvements in or relating to a method of forming synthetic rubber and the product resulting therefrom |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB635336A (en) |
-
1944
- 1944-09-21 GB GB18052/47A patent/GB635336A/en not_active Expired
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