Title:
A PROCESS FOR MAKING A THERMOPLASTIC MOLDING COMPOSITION
Document Type and Number:
WIPO Patent Application WO2002022714
Kind Code:
A3
Abstract:
A process for producing a thermoplastic molding composition is disclosed. The process entails introducing a solid polymeric resin, optionally containing residual moisture, into an extruder, operating under conditions designed to melt the resin and charging water into the melt while in the extruder to yield wet, molten resin that contains water in an amount of at least about 2 percent. The wet, molten resin is then devolatilized to yield dry resin having water content not exceeding 0.3 percent. Molding compositions thus produced have improved properties. In a preferred embodiment, the process results in a molding composition that contains a fine dispersion of a discontinuous phase in a continuous polymeric phase.
More Like This:
Inventors:
KOZLOWSKI HENRY A
Application Number:
PCT/US2001/027667
Publication Date:
May 30, 2002
Filing Date:
September 05, 2001
Export Citation:
Assignee:
BAYER AG (US)
International Classes:
C08J3/20; B29B7/38; C08J3/00; C08K3/20; C08L9/00; C08L23/00; C08L25/04; B29K23/00; B29K25/00; (IPC1-7): C08J3/00
Foreign References:
| EP0172436A2 | 1986-02-26 | |||
| US3299186A | 1967-01-17 | |||
| EP0534235A1 | 1993-03-31 | |||
| EP0590847A1 | 1994-04-06 |
Other References:
DATABASE CHEMABS CHEMICAL ABSTRACTS SERVICE, COLUMBUS, OHIO, USA; XP002190957
Download PDF: