Method and catalyst for the production of high trans-polyalkadiene
US4035570A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 1975 |
| Grant date | Jul 12, 1977 |
| Priority date | — |
| Expiry date | Jan 23, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F36/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyalkadienes with high percentage of trans configurations are produced by employing a catalyst system obtained by admixing (A) at least one hydride having the general formula MZR.sub.a H.sub.(4-a) wherein M is lithium, sodium, potassium, rubidium or cesium, Z is aluminum or boron, R is hydrogen or a monovalent, saturated, cyclic or acyclic hydrocarbon radical containing up to 12 carbon atoms, and a is an integer between 0 and 2, (B) at least one titanium tetrahalide compound having the general formula TiX.sub.4 wherein X is chloride or bromide, (C) an iodine composition having the general formula R'I wherein R' is a monovalent, saturated, cyclic or acyclic hydrocarbon radical containing up to 12 carbon atoms, and (D) an ether having the general formula R"--O--R'" wherein R" and R"' can be the same or different monovalent, saturated, cyclic or acyclic hydrocarbon radicals containing 2 to 12 carbon atoms with a total of not more than about 16 carbon atoms per ether molecule.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.