Means of producing high diblock content thermoplastic elastomers with functional termination
US6417270B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2001 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Jan 9, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F297/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process of preparing a diblock/triblock composition in a single reaction vessel includes reacting a first monomer, such as styrene, with a first portion of an anionic catalyst in a suitable solvent to form a first polymer block of the triblock. A second step includes adding a second monomer, such as butadiene (when the first monomer is styrene). This forms a second block of the triblock and a first block of the diblock. A further addition of the first monomer completes the diblock and triblock interpolymers. At least a portion of the diblock and/or triblock interpolymers are functionally terminated with a functional terminating agent, such as cyclohexene oxide or isopropanol, to provide the blocks with a functional group. The functional group and the proportion of the interpolymers functionally terminated are selected to provide desired adhesive properties for a particular application.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.