Robert A Schiavone

US Patent:

6335422, Jan 1, 2002

Filed:

May 8, 2001

Appl. No.:

09/851240

Inventors:

Robert Joseph Schiavone - Matthews NC

Assignee:

Wellman, Inc. - Shrewsbury NJ

International Classification:

C08G 6366

US Classification:

528300, 528301, 528307, 5283086, 528503

Abstract:

The present invention is a method of preparing a high molecular weight copolyester bottle resin that has excellent melt processing characteristics. The method includes the steps of reacting a diacid or diester component and a diol component to form modified polyethylene terephthalate, wherein diol component is present in excess of stoichiometric proportions. Together, the diacid or diester component and the diol component must include at least 7 percent comonomer. The remainder of the diacid component is terephthalic acid or dimethyl terephthalate and the remainder of the diol component is ethylene glycol. The modified polyethylene terephthalate is copolymerized in the melt phase to an intrinsic viscosity of between about 0. 25 dl/g and 0. 40 dl/g to thereby form a copolyester prepolymer.

US Patent:

6500890, Dec 31, 2002

Filed:

Dec 15, 2000

Appl. No.:

09/738619

Inventors:

Walter Lee Edwards - Harrisburg NC
Robert Joseph Schiavone - Matthews NC
Carl Steven Nichols - Waxhaw NC
Tony Clifford Moore - Charlotte NC

Assignee:

Wellman, Inc. - Shrewsbury NJ

International Classification:

C08K 326

US Classification:

524425, 524451, 523205, 523212

Abstract:

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.

US Patent:

6569991, May 27, 2003

Filed:

Aug 17, 2001

Appl. No.:

09/932150

Inventors:

Carl Steven Nichols - Waxhaw NC
Tony Clifford Moore - Charlotte NC
Robert Joseph Schiavone - Matthews NC
Walter Lee Edwards - Harrisburg NC

Assignee:

Wellman, Inc. - Shrewsbury NJ

International Classification:

C08F 600

US Classification:

528491, 528272, 528486, 528487, 528489, 528503, 525437, 524 81, 524115, 428 363, 428364, 428 357, 2641761, 2642091, 264464

Abstract:

The invention is a novel 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.

US Patent:

6573359, Jun 3, 2003

Filed:

Dec 14, 2001

Appl. No.:

10/017612

Inventors:

Carl Steven Nichols - Waxhaw NC
Tony Clifford Moore - Charlotte NC
Robert Joseph Schiavone - Matthews NC
Walter Lee Edwards - Harrisburg NC

Assignee:

Wellman, Inc. - Shrewsbury NJ

International Classification:

C08F 600

US Classification:

528491, 528486, 528487, 528489, 528503, 525437, 524 81, 524115, 428 357, 428 363, 428364, 2641761, 2642091, 264464, 526 65, 526 66

Abstract:

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.

US Patent:

6590069, Jul 8, 2003

Filed:

Dec 14, 2001

Appl. No.:

10/017400

Inventors:

Carl Steven Nichols - Waxhaw NC
Tony Clifford Moore - Charlotte NC
Robert Joseph Schiavone - Matthews NC
Walter Lee Edwards - Harrisburg NC

Assignee:

Wellman, Inc. - Shrewsbury NJ

International Classification:

C08F 600

US Classification:

528491, 528486, 528487, 528489, 528503, 525437, 524 81, 524115, 428 363, 428364, 428 357, 2641761, 2642091, 264464, 526 65, 526 66

Abstract:

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.

US Patent:

6710158, Mar 23, 2004

Filed:

Jun 21, 2002

Appl. No.:

10/177932

Inventors:

Walter Lee Edwards - Harrisburg NC
Robert Joseph Schiavone - Matthews NC
Carl Steven Nichols - Waxhaw NC
Tony Clifford Moore - Charlotte NC

Assignee:

Wellman, Inc. - Shrewsbury NJ

International Classification:

C08G 6378

US Classification:

528275, 5283083, 5283088, 528488, 524425, 524451

Abstract:

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.

US Patent:

6727306, Apr 27, 2004

Filed:

Jun 21, 2002

Appl. No.:

10/176737

Inventors:

Walter Lee Edwards - Harrisburg NC
Robert Joseph Schiavone - Matthews NC

Assignee:

Wellman, Inc. - Shrewsbury NJ

International Classification:

C08K 326

US Classification:

524425, 524451, 523205, 523212, 428 357, 428403, 428405, 428407

Abstract:

The invention is a polymer 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 polymer resin is capable of being formed into low-haze, high-clarity bottles and films possessing reduced coefficient of friction.

US Patent:

7094863, Aug 22, 2006

Filed:

Nov 24, 2004

Appl. No.:

10/996789

Inventors:

Tony Clifford Moore - Charlotte NC, US
David Eugene Thompson - Florence SC, US
Sharon Sue Griffith - Charlotte NC, US
Carl S. Nichols - Waxhaw NC, US
Billy Mack Humelsine - Waxhaw NC, US
Robert Joseph Schiavone - Matthews NC, US

Assignee:

Wellman, Inc. - Fort Hill SC

International Classification:

C08G 63/00

US Classification:

528272, 2641766, 264219, 524424, 528271

Abstract:

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 F. and 205 F.