Synthesis of silyl-functional telechelic hydrocarbon polymers
US5521255A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1995 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | May 30, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F36/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing a telechelic polydiene having at least 70% 1,4-microstructure and at least 70% of its end groups capped by reactive silyl functionality is disclosed, said method comprising: PA0 (I) reacting, in a non-polar solvent solution, (A) at least one diene monomer, (B) a dianionic initiator which is soluble in said non-polar solvent and, optionally, (C) a polymerization adjuvant to form a dianionically active polydiene; and PA0 (II) capping both ends of said dianionically active polydiene from step (I) with (D) a silane, said capping being carried out in the presence of (E) a promoter selected from the group consisting of a tertiary amine and a crown ether based on 12-crown-4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.