The Goodyear & Tire Rubber Company

M&g USA Corporation

Shell Oil Comapny

Freddie Lee Massey

Edwin Andrew Sisson

Gianluca Ferrari

Douglas D Callander

Dan Gastaldo

Delane Nagel Richardson

William C Tung

Kevin L Rollick

Ben Duh

Deborah A Tung

John E Hrivnak

Donald L Brown

Richard M Oblath

George A Deisz

Charles Louis Kern, Jr

Millicent Louise Martin-Shultz

Compartmentalized chips of at least two chemically similar crystallizable thermoplastic polymers each having a different intrinsic viscosity placed in separate zones are disclosed. These compartmentalized chips exhibit thermal characteristics that are different from the traditional technique of homogeneously combining the two materials into the chip. These compartmentalized chips in their amorphous, crystalline and solid phase polymerized forms exhibit a longer crystallization half time than the homogeneous mixture, thus permitting faster injection cycle times when compared to an equivalent homogenous mixture.

Compartmentalized chips with similar polymers of different viscosities for improved processability

Compartmentalized chips of at least two chemically similar crystallizable thermoplastic polymers each having a different intrinsic viscosity placed in separate zones are disclosed. These compartmentalized chips exhibit thermal characteristics that are different from the traditional technique of homogeneously combining the two materials into the chip. These compartmentalized chips in their amorphous, crystalline and solid phase polymerized forms exhibit a longer crystallization half time than the homogeneous mixture, thus permitting faster injection cycle times.

Compartmentalized chips with polymers of different viscosities for improved processability

A thermoplastic composition, such as PET, contains an inert iron compound such as FeP, FeSi, or combinations thereof, having no chemical activity in the PET, with or without certain quantities of elemental metals, such as antimony, and a reducing agent or other stabilizer such as phosphite or phosphoric acid. A method for forming this composition is also disclosed. The composition may also optionally contain a color stabilizer, a DEG inhibitor and stress crack inhibiting agents.

Process for fast heat-up polyesters

A process is disclosed to prepare a polyester resin having a predetermined acetaldehyde (AA) content whereby the IV of the melt phase resin is constrained to a certain range resulting in a longer SSP time to achieve a higher level of IV for the resin with an AA content of 1 PPM or less. The resultant resin can be transformed into a bottle preform, which, when blown, forms a bottle suitable for packaging of mineral water.

Process to prepare a polyester resin

An improved process for manufacturing highly uniform industrial yarn which exhibits high tenacity, high modulus and very low shrinkage which comprises melt spinning polyethylene terephthalate into spun filaments and subsequently drawing the spun filaments in a heated zone to a draw ratio of at least about 1.05:1; wherein the spun filaments have a birefringence of at least about 0.075 and a crystallinity of at least about 10%; wherein the spun filaments are in the heated zone for a residence time of at least 0.3 seconds; and wherein the yarn in the heated zone is at a temperature which is between the glass transition temperature and the melting temperature of the polyethylene terephthalate.

Process for manufacturing polyethylene terephthalate industrial yarn

Specific color imparting compounds, including colorants and catalysts are used to produce a polyester resin having an amber color. The compounds are added during the preparation of the polymer and the resins produced can be utilized to make various containers or packages to hold liquids or solids.

Composition and process for making an amber colored polyester

This invention relates to a method of improving the brightness and color of a polyester resin and reducing the acetaldehyde content by passing the resin through molecular sieves at a temperature of from 230.degree. C. to about 300.degree. C.

Color improvement and acetaldehyde reduction in high molecular weight

There is disclosed low carboxyl high molecular weight polyester compositions comprising the product of the reaction of an aziridine compound with the polycondensation product derived from the reaction of a diol and a dicarboxylic acid or C.sub.1 to C.sub.4 alkyl ester thereof and processes for preparing said compositions.

Growing community of inventors

Uniontown, OH, United States of America

Freddie Lee Massey