Synthesis of siloxane-functional telechelic hydrocarbon polymers
US5561210A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1995 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | May 30, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L83/10
- 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 silanol-terminated siloxane functionality is disclosed, said method comprising: (I) reacting, in a non-polar solvent solution, PA1 (A) at least one diene monomer, PA1 (B) a dianionic initiator which is soluble in said non-polar solvent and, optionally, PA1 (C) a polymerization adjuvant to form a dianionically active polydiene; (II) reacting said dianionically active polydiene from step (I) with PA1 (D) a cyclic siloxane, in the presence of PA1 (E) a promoter selected from the group consisting of an organic sulfoxide, a tertiary amide and mixtures thereof to cap both ends of said dianionically active polydiene; and (III) quenching the capped product from step (II).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.