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Polymer Blend Compositions and Fibers Formed Therefrom

IP.com Disclosure Number: IPCOM000031977D
Publication Date: 2004-Oct-18
Document File: 1 page(s) / 8K

Publishing Venue

The IP.com Prior Art Database

Abstract

Extrudable thermoplastic polymer blends (e.g. a polyester, a syndiotact polystyrene and a compatibilizer) yield fibers with good mechanical properties that can be used alone or in combination with other fibers (e.g. natural fibers such as wool or cotton and/or other synthetic polymer fibers.

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Polymer Blend Compositions and Fibers Formed Therefrom

                    Extrudable thermoplastic polymer blend compositions suitable for conversion to fibers that exhibit good mechanical properties and a delustered appearance include polyester (e.g. poly(ethylene terephthalate), poly(trimethylene terephthalate) or poly(butylenes terephthalate)), a syndiotactic vinyl aromatic polymer (e.g. syndiotactic polystyrene) and a compatibilizer.  The fibers can be used in fabricating wearing apparel, textiles, carpets or filter media depending upon fiber properties such as fiber diameter and fiber length.  The fibers can be used either alone or in combination with other fibers (e.g. natural fibers such as wool or cotton or other synthetic polymeric fibers).   

                    The compatibilizer desirably has good compatibility with the syndiotactic vinyl aromatic polymer and contains one or more chemical moieties that react with main chains and/or end groups of the polyester.  One such compatibilizer, a copolymer of styrene with 6% by weight of glycidyl methacrylate, contains reactive epoxy moieties that react with both acid and hydroxyl end groups in combination with styrene for compatibility with syndiotactic vinyl aromatic polymers such as syndiotactic polystyrene.  Other compatibilizer reactive chemistries suitable for copolymerization with a vinyl aromatic monomer such as styrene include those based on amines, isocyanates, acid chlorides, acid anhydrides, alky...