Wellman Inc.

Hoechst Celanese Corporation

Dak Americas Mississippi Inc.

Carl Steven Nichols

Tony Clifford Moore

Robert Joseph Schiavone

Billy Mack Humelsine

Walter Lee Edwards

Sharon Sue Griffith

David Eugene Thompson

James Burch Branum

Keith James Carnes

Eric J Blaeser

John V Edwards

Joseph C Tucker

Daniel Allen Huenefeld

Robert Adrian Ellis

James Scott Thomas

Robert Joseph Schivaone

A method for making polyethylene terephthalate resin in which a titanium-nitride polycondensation catalyst is introduced during the initial stages of esterification or transesterification. The titanium-nitride polycondensation catalyst may be added to a mixture containing a terephthalate component and a diol component during the formation of a polyethylene terephthalate precursor. Subsequent polycondensation of the polyethylene terephthalate precursor forms a polyethylene terephthalate polymer.

Titanium-nitride catalyzed polyester

The present invention relates to titanium-catalyzed polyethylene terephthalate resins that are capable of being formed into articles (e.g., carbonated soft drink and water bottle preforms) at reduced injection-molding cycle times. In particular, the titanium-catalyzed polyethylene terephthalate resins of the present invention can be formed into carbonated soft drink bottle preforms at reduced injection-molding cycle times to yield high-clarity, carbonated soft drink bottles that possess satisfactory resistance to stress cracking and thermal creep.

Polyester resins for high-efficiency injection molding

The present invention relates to slow-crystallizing, titanium-catalyzed polyethylene terephthalate resins that are useful for making high-strength, high-clarity bottles that possess improved resistance to stress cracking and thermal creep. The polyethylene terephthalate resins possess improved reheating profiles and are especially useful for making polyester articles that have exceptional clarity, dimensional stability, and thermal stability.

Polyester resins for high-strength articles

The invention embraces polyester resins and containers that include surface-modified talc. The invention also embraces a method for the late introduction of surface-modified talc via a reactive carrier to achieve a polyester resin that is capable of being formed into low-haze, high-clarity bottles possessing reduced coefficient of friction.

Polyester resins and polyester containers having reduced frictional properties

The invention is a method for making condensation polymers, such as polyethylene terephthalate polyester. The method includes introducing a catalyst system, which includes a coordination catalyst component and an acid component, to a polycondensation reaction.

Solid phase polymerization catalyst system

The invention is a method for making condensation polymers, such as polyethylene terephthalate polyester. The method includes introducing to a polycondensation reaction a catalyst system that includes a coordination catalyst and a composite catalyst, which includes an acid component and an auxiliary component.

Composite solid phase polymerization catalyst

The invention is a method for the late introduction of additives into polyethylene terephthalate. The method employs a reactive carrier that functions as a delivery vehicle for one or more additives. The reactive carrier reacts with the polyethylene terephthalate, thereby binding the reactive carrier in the polyethylene terephthalate resin and preventing the emergence of the reactive carrier and additives from the polyethylene terephthalate during subsequent thermal processing.

Methods for introducing additives into polyethylene terephthalate

The present invention relates to slow-crystallizing polyethylene terephthalate resins that possess a significantly higher heating crystallization exotherm peak temperature (T) as compared with those of conventional antimony-catalyzed polyethylene terephthalate resins. The polyethylene terephthalate resins of the present invention are especially useful for making hot-fill bottles having exceptional clarity.

Slow-crystallizing polyester resins

The present invention relates to slow-crystallizing polyethylene terephthalate resins that possess a significantly higher heating crystallization exotherm peak temperature (T) as compared with those of conventional antimony-catalyzed polyethylene terephthalate resins. The polyethylene terephthalate preforms of the present invention, which possess improved reheating profiles, are especially useful for making polyester bottles that have exceptional clarity and that retain acceptable dimensional stability upon being hot-filled with product at temperatures between about 195&#xb0; F. and 205&#xb0; F.

Polyester preforms useful for enhanced heat-set bottles

Methods for the late introduction of additives into polyethylene terephthalate

The invention is a polyester resin that includes between about 20 and 200 ppm of an inert particulate additive, preferably selected from the group consisting of surface-modified talc and surface-modified calcium carbonate. The invention is also a method of making the polyester resin, which is capable of being formed into low-haze, high-clarity bottles possessing reduced coefficient of friction.

Methods for making polyester bottle resins having reduced frictional properties

Disclosed is a method of copolymerizing polyethylene glycol (PEG) and branching agent into polyethylene terephthalate (PET) to achieve a polyethylene glycol-modified polyester composition that can be spun into filaments. Fabrics made from fibers formed from the copolyester composition possess wicking, dyeability, and tactility properties that are superior to those of fabrics formed from conventional polyethylene terephthalate fibers of the same yarn and fabric construction. Also disclosed are polyethylene glycol modified copolyester compositions, fibers, yarns, and fabrics.

Polyethylene glycol modified polyester fibers and method for making the same

The invention is a novel method for the late introduction of additives into a continuous process for making polyethylene terephthalate. The method employs a reactive carrier that functions as a delivery vehicle for one or more additives. The reactive carrier reacts with the polyethylene terephthalate, thereby binding the reactive carrier in the polyethylene terephthalate resin and preventing the emergence of the reactive carrier and additives from the polyethylene terephthalate during subsequent thermal processing.

Methods of post-polymerization injection in continuous polyethylene terephthalate production

The invention is a novel method for the late introduction of additives into condensation polymers. The method employs a reactive carrier that functions as a delivery vehicle for one or more additives. The reactive carrier reacts with the condensation polymers, thereby binding the reactive carrier in the polymer resin and preventing the emergence of the reactive carrier from the polymer resin during subsequent thermal processing.

Methods of post-polymerization extruder injection in condensation polymer production

The invention is a novel method for the late introduction of additives into a process for making condensation polymers. The method employs a reactive carrier that functions as a delivery vehicle for one or more additives. The reactive carrier reacts with the condensation polymers, thereby binding the reactive carrier in the polymer resin and preventing the emergence of the reactive carrier from the polymer resin during subsequent thermal processing.

Growing community of inventors

Waxhaw, NC, United States of America

Carl Steven Nichols