Production of porous diene polymer pellets by mechanical drying
US6414042B1 · kind B1 · utility
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Key dates
| Filing date | Oct 18, 2001 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Oct 18, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T82/2547
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for finishing a hydrogenated diene polymer by producing porous pellets from a water slurry of the hydrogenated block copolymer. The process comprises adjusting the water content of the slurry to from 9 to 16 percent by weight, moving the slurry through a mechanical two-stage extruder dryer, drying the slurry at a temperature of 100 to 180° C., and recovering porous copolymer pellets having a moisture content of 0.2 to 3.0 percent by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.