GB872283A - Polymerization of isoprene - Google Patents
Polymerization of isopreneInfo
- Publication number
- GB872283A GB872283A GB2632859A GB2632859A GB872283A GB 872283 A GB872283 A GB 872283A GB 2632859 A GB2632859 A GB 2632859A GB 2632859 A GB2632859 A GB 2632859A GB 872283 A GB872283 A GB 872283A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polymer
- slurry
- water
- aluminium
- isoprene
- 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
- 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
- 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)
- General Chemical & Material Sciences (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
Abstract
A process for producing a solid polymer or copolymer of isoprene in which at least 90% of the isoprene units are united cis-1, 4, and containing not more than 49 mol per cent comonomer is characterized by (a) polymerizing the monomer(s) at below 10 DEG C. in a volatile inert hydrocarbon medium, having a boiling point below the polymerization temperature and capable of dissolving 0,5%-5% of the polymer, using a catalyst prepared from (1) a titanium compound in which the titanium has a valence of at least 3 and (2) a hydrocarbon aluminium in which an average of at least two of the valence bonds of the aluminium are attached to a hydrocarbon radical through a carbon-to-aluminium bond; and in which the Ti/Al proportions are between 0,75-1 and 0,95-1 and then carrying out steps (b) and (c) separately and simultaneously, step (b) being contacting the slurry polymer with either a quench liquid and water or with deaerated water to produce a separable aqueous catalyst layer and removing the aqueous catalyst layer from the polymer slurry, while step (c) comprises combining the polymer slurry of step (b) with from 1/2 -2 volumes of water for every volume of slurry, and removing the volatile inert medium at at least 55 DEG C. to produce a slurry of polymer in water and then (d) separating off the polymer. The preferred catalyst is prepared from titanium tetrachloride and trialkyl aluminium; at least 95 mol per cent isoprene is preferably used; the heat of reaction may be carried away by refluxing the volatile inert hydrocarbon, e.g. n-butane; specified copolymerizable materials are propylene, butene, pentene, 1-hexene, 1-octene, styrene, vinyl toluene, butadiene, piperylene, 2-ethyl-butadiene, and 2-phenyl butadiene; the quench liquid may be water containing an organic solvent, e.g. acetone or a water containing lower aliphatic alcohol; while an antioxidant may be added after step (a) and a non-ionic surface-active material in step (c). Apparatus for carrying out the process is described. Specification 827,365 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US75256958A | 1958-08-01 | 1958-08-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB872283A true GB872283A (en) | 1961-07-05 |
Family
ID=25026842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2632859A Expired GB872283A (en) | 1958-08-01 | 1959-07-31 | Polymerization of isoprene |
Country Status (7)
Country | Link |
---|---|
BE (1) | BE581248A (en) |
CH (1) | CH412341A (en) |
DE (2) | DE1169089B (en) |
FR (2) | FR1221553A (en) |
GB (1) | GB872283A (en) |
LU (1) | LU37151A1 (en) |
NL (2) | NL121532C (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT549009A (en) * | 1954-08-16 | Du Pont | ||
NL211963A (en) * | 1955-11-08 |
-
0
- NL NL241935D patent/NL241935A/xx unknown
-
1959
- 1959-04-16 FR FR792287A patent/FR1221553A/en not_active Expired
- 1959-04-23 DE DEL33066A patent/DE1169089B/en active Pending
- 1959-04-28 LU LU37151D patent/LU37151A1/xx unknown
- 1959-07-31 DE DEG27625A patent/DE1129701B/en active Pending
- 1959-07-31 GB GB2632859A patent/GB872283A/en not_active Expired
- 1959-07-31 BE BE581248A patent/BE581248A/en unknown
- 1959-08-01 CH CH7648059A patent/CH412341A/en unknown
- 1959-08-01 NL NL241935A patent/NL121532C/xx active
- 1959-08-01 FR FR801796A patent/FR1236178A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1169089B (en) | 1964-04-30 |
LU37151A1 (en) | 1960-10-28 |
NL241935A (en) | |
DE1129701B (en) | 1962-05-17 |
BE581248A (en) | 1960-02-01 |
NL121532C (en) | 1966-11-15 |
FR1221553A (en) | 1960-06-02 |
FR1236178A (en) | 1960-07-15 |
CH412341A (en) | 1966-04-30 |
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