Method for producing a flame retardant polycarbonate resin composition
US6833397B2 · kind B2 · utility
3Cited by
1References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2001 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | Sep 23, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/0026
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a method for producing a flame retardant polycarbonate resin composition by using a screw extruder, which comprises extruding a resin component (mainly comprising a polycarbonate) and an organic phosphorus compound having an acid value of not more than 0.1 mg KOH/g while kneading, wherein the temperature of the resin component in the extruder is not higher than 300° C., and the residence time of the resin component in the extruder is not more than 40 seconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.