Devolatilizing molten polymer with a rotary disk processor
US4362852A · kind A · utility
14Cited by
13References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1981 |
| Grant date | Dec 7, 1982 |
| Priority date | — |
| Expiry date | Sep 16, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/46
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention is an improved process to remove volatiles from molten synthetic, preferably fiber forming relatively high viscosity polymers which comprises passing molten polymer through a rotary disk polymer processor at a temperature of between 260.degree. C. and 300.degree. C. at a rate of between about 10 and 75 pounds (4.5 and 34 kg) per hour per square foot (0.093 m.sup.2) of processor filming area, at a rotational rate of between about 5 and 75 rpm for the disks, and a processor having between 1 and 20 stages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.