Melt devolatilization extrusion process
US9238723B2 · kind B2 · utility
1Cited by
10References
18Claims
0Family size
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Key dates
| Filing date | Oct 12, 2011 |
| Grant date | Jan 19, 2016 |
| Priority date | — |
| Expiry date | Oct 18, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Thermally sensitive polymers containing polymerizable carbon-carbon unsaturation and/or aliphatically bound halogen are devolatilized in a devolatilizing extruder. The thermally sensitive polymer is blended with a second polymer, which does not contain polymerizable carbon-carbon unsaturation or more than 5% by weight aliphatically bound halogen, and which has a molecular weight of from 25,000 to 175,000. The blend is then devolatilized in the extruder to produce a devolatilized polymer blend. Thermal degradation of the thermally sensitive polymer is minimized in this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.