GB1154104A - Process for Isolating Elastomers. - Google Patents
Process for Isolating Elastomers.Info
- Publication number
- GB1154104A GB1154104A GB769167A GB769167A GB1154104A GB 1154104 A GB1154104 A GB 1154104A GB 769167 A GB769167 A GB 769167A GB 769167 A GB769167 A GB 769167A GB 1154104 A GB1154104 A GB 1154104A
- Authority
- GB
- United Kingdom
- Prior art keywords
- column
- solution
- temperature
- elastomers
- catalyst
- 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
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08C—TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
- C08C2/00—Treatment of rubber solutions
- C08C2/06—Wining of rubber from solutions
-
- 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
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
1,154,104. Isolating elastomers. FARBENFABRIKEN BAYER A.G. 17 Feb., 1967 [31 March, 19661, No. 7691/67. Heading C3P. Elastomers are isolated from their solution in organic solvents by introducing said solution at the bottom end of a column through which is passed an aqueous medium effecting a fine distribution of said solution and separating at the head of the column aqueous medium, elastomer particles, steam, and azeotropically distilling organic solvent, in which procedure the temperature at the bottom end of the column is above the boiling point of said solvent or its azeotropic mixture and the temperature at the head of the column is below the temperature at the bottom of the column and is approximately equal to the boiling temperature of the azeotropic mixture. The solutions are those obtained at the end of polymerization and after inactivation of the catalyst. The solution is suitably introduced together with steam. Elastomers mentioned are homo- and copolymers of isoprene, butadiene, chlorobutadiene, and piperylene, rubbery ethylene copolymers, rubbery polyurethane prepolymers and silicone rubbers. The process may be carried out continuously and a flow sheet for such a process is,illustrated. In the example a solution of cis- 1 ,4-polyisoprene in benzene is obtained by polymerizing isoprene using a TiCl 4 /Al(C 2 H 5 ) 3 catalyst, inactivating the catalyst with methanol, and adding a phenolic stabilizer and stearic acid, and the elastomer isolated in accordance with the process described above.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF0048818 | 1966-03-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1154104A true GB1154104A (en) | 1969-06-04 |
Family
ID=7102505
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB769167A Expired GB1154104A (en) | 1966-03-31 | 1967-02-17 | Process for Isolating Elastomers. |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE696158A (en) |
FR (1) | FR1515687A (en) |
GB (1) | GB1154104A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4138310A (en) * | 1975-05-14 | 1979-02-06 | Chemische Werke Huels Aktiengesellschaft | Continuous process for the removal of residual monomer from aqueous dispersions of homo- and copolymers of vinyl chloride |
-
1967
- 1967-02-17 GB GB769167A patent/GB1154104A/en not_active Expired
- 1967-03-28 FR FR100472A patent/FR1515687A/en not_active Expired
- 1967-03-28 BE BE696158D patent/BE696158A/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4138310A (en) * | 1975-05-14 | 1979-02-06 | Chemische Werke Huels Aktiengesellschaft | Continuous process for the removal of residual monomer from aqueous dispersions of homo- and copolymers of vinyl chloride |
Also Published As
Publication number | Publication date |
---|---|
FR1515687A (en) | 1968-03-01 |
DE1694108B2 (en) | 1975-08-28 |
BE696158A (en) | 1967-09-01 |
DE1694108A1 (en) | 1972-03-16 |
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