Production of haze-free block copolymers
US6291584A · kind A · utility
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19Claims
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Key dates
| Filing date | Jun 8, 2000 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Jun 8, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for reducing the water take up of a vinyl aromatic-conjugated diene polymer when subjected to a humid environment, the process comprising solution polymerising at least one vinyl aromatic hydrocarbon and a conjugated diene in the presence of a catalyst based on an alkali metal to produce alkalimetal derivatives of a vinyl aromatic-conjugated diene polymer and neutralising the derivatives with a C.sub.9 -C.sub.16 alkyl dicarboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.