Graft, graft-block, block-graft, and star-shaped copolymers and methods of making them
US6384146B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Apr 4, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F297/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a continuous method of preparing a block-graft or star-shaped copolymer. This method involves providing a living polymer, mixing the living polymer with a first monomer under conditions effective to produce a block copolymer, wherein the first monomer includes a polymerization site and a polymerization initiation site, and mixing the block copolymer with a second monomer under conditions effective to produce a block-graft or star-shaped copolymer. The present invention also relates to a continuous method of preparing a graft or graft-block copolymer. This method involves mixing a first monomer and a second monomer under conditions effective to produce a copolymer of the first and second monomers, wherein the second monomer comprises a polymerization site and a polymerization initiation site, mixing the copolymer with a third monomer under conditions effective to produce a graft copolymer, and mixing the graft copolymer with a fourth monomer under conditions effective to produce a graft-block copolymer. The present invention also relates to graft, graft-block, block-graft, and star-shaped copolymers produced by the methods of the present invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.