Method for crystallizing crystallizable polymers having a high tendency to agglomerate
US8728368B2 · kind B2 · utility
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10References
26Claims
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Key dates
| Filing date | Sep 22, 2008 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Apr 28, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for producing a semicrystalline polymer, said method comprising the following steps: producing a polymer melt from a crystallizable polymer; shaping particles and solidifying the polymer melt, the step of shaping the particles being carried out before or after solidification; cooling the particles; treating the particles to reduce their tendency to agglomerate; crystallizing the particles. The invention is characterized in that the treatment is carried out by shaking at a temperature T1 which is below the glass transition temperature of the polymer plus 10° C., i.e. T1<Tg+10° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.