Title:
NO DRY MASTER BATCH FOR POLYESTER RESINS
Document Type and Number:
WIPO Patent Application WO2002098938
Kind Code:
A3
Abstract:
The present invention provides a master batch for polyester resins that does not nee to be dried to use. The master batch according to the invention includes an additive package dispersed in a carrier. The additive package includes one or more colorants, light stabilizers, heat stabilizers, flame retardants, antioxidants, lubricants, anti-stats, biocides, fillers, and process aids. The carrier includes from about 10 to about 25 percent by weight of one or more polyhydric alcohol esters of wood and/or gum rosin, from about 5 to about 35 percent by weight of one or more core-shell polymers, and from about 25 to about 70 percent by weight of one or more thermoplastic polyesters compatible with the bulk polyesters molding resins. The present invention also provides a method of forming a polyester article. The method includes letting down a master batch according to the invention into a polyester resin, heating the master batch and the polyester resin to form a melt, and processing the melt to form the polyester article. The method can be used to form a variety of polyester articles such as, for examples, blow molded bottles, extrusion blow molded bottles, injection molded bottles, extruded film sheets, and drawn fibers.
Inventors:
OPALKO ROBERT J
Application Number:
PCT/US2002/016927
Publication Date:
March 13, 2003
Filing Date:
May 29, 2002
Export Citation:
Assignee:
FERRO CORP (US)
International Classes:
C08J3/22; C08K5/103; (IPC1-7): C08K5/09; C08K5/10; C08K5/12
Foreign References:
| US6130290A | 2000-10-10 | |||
| GB1490320A | 1977-11-02 |
Other References:
See also references of EP 1401939A4
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