GB910227A - Polymerization of diolefins - Google Patents
Polymerization of diolefinsInfo
- Publication number
- GB910227A GB910227A GB3068361A GB3068361A GB910227A GB 910227 A GB910227 A GB 910227A GB 3068361 A GB3068361 A GB 3068361A GB 3068361 A GB3068361 A GB 3068361A GB 910227 A GB910227 A GB 910227A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lithium
- biphenyl
- naphthalene
- specified
- titanium trichloride
- 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)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Conjugated diolefins are polymerized or copolymerized with other ethylenically unsaturated compounds in the presence of a catalyst comprising the reaction product of (A) a lithium arylide of a fused ring or contiguous ring aromatic hydrocarbon with (B) titanium trichloride, said titanium trichloride being present in amount such that the ratio of gram atoms of lithium to gram mols. of titanium trichloride is between 0,07 and 3,0. Specified diolefins are isoprene, butadiene, 2-methyl-1,3-pentadiene, 2,3-dimethyl butadiene and cyclopentadiene. Specified polynuclear aromatic hydrocarbons are naphthalene, anthracene, chrysene, biphenyl, fluorene, triphenylene, naphthacene and phenanthrene; preferred catalyst components being lithium naphthalenide and dilithium biphenylide. The titanium trichloride may be in the form of a complex with lithium and aluminium trichloride. Specified comonomers are styrene and a -methylstyrene. Polymerization may be effected in the presence of solvents, e.g. propane, pentane, hexane, heptane, dodecane, cyclopentane, cyclohexane, methyl cyclohexane and benzene. The monomer may be purified by refluxing with sodium or other alkali metal sand followed by distillation. The solvents may be purified by dehydration with silica gel, alumina or calcium chloride followed by distillation. Catalyst destruction and polymer stabilization may be effected by adding a solution of an antioxidant, e.g. phenyl-b -naphthylamine, in methanol or isopropanol. The products have predominantly cis-1,4 structure and may be used as substitutes for Hevea rubber in tyres, air springs, torsion bushings and tubing.ALSO:Arene lithium compounds may be prepared by mixing or grinding lithium with fused ring or contiguous ring aromatic hydrocarbons. Specified hydrocarbons are naphthalene, anthracene, chrysene, biphenyl, fluorene, triphenylene, naphthacene and phenanthrene. Examples describe the preparation of (1) naphthalene lithium by mixing a dispersion of lithium in petrolatum with naphthalene and (IX) biphenyl di-lithium by grinding lithium foil with biphenyl. The compounds may be used in the preparation of polymerization catalysts.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US5360760A | 1960-09-02 | 1960-09-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB910227A true GB910227A (en) | 1962-11-14 |
Family
ID=21985397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3068361A Expired GB910227A (en) | 1960-09-02 | 1961-08-25 | Polymerization of diolefins |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1159169B (en) |
GB (1) | GB910227A (en) |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1040796B (en) * | 1955-09-19 | 1958-10-09 | Firestone Tire & Rubber Co | Process for the production of a substantially cis-structured rubbery polyisoprene |
AT207564B (en) * | 1958-01-22 | 1960-02-10 | Montedison Spa | Process for polymerizing conjugated diolefins |
-
1961
- 1961-08-25 GB GB3068361A patent/GB910227A/en not_active Expired
- 1961-08-29 DE DEF34808A patent/DE1159169B/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE1159169B (en) | 1963-12-12 |
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