George J Cremeans

US Patent:

53876679, Feb 7, 1995

Filed:

Aug 9, 1993

Appl. No.:

8/103098

Inventors:

Richard A. Markle - Columbus OH
Joel D. Elhard - Hilliard OH
Donald M. Bigg - Columbus OH
Sylvester Sowell - Columbus OH
Phyllis L. Brusky - Columbus OH
George E. Cremeans - Groveport OH

Assignee:

Battelle Memorial Institute - Columbus OH

International Classification:

C08G 7504

US Classification:

528374

Abstract:

Thermally-reversible polymer compositions are obtained by reacting compounds with isocyanate and labile-hydrogen functionality. High-performance characteristics are incorporated into the polymer by using aromatic polycarbonate, aromatic polyester, polyarylsulfide, and polyarylimidazolidine oligomers. The compositions are useful as hot-melt adhesives, coatings and especially finish surface coatings on composite materials such as polypropylene and polyethylene terephthalate, moldings and in injection reaction molding applications and composite and laminate fabrication.

US Patent:

57507325, May 12, 1998

Filed:

May 19, 1995

Appl. No.:

8/444954

Inventors:

Dan W. Verser - Golden CO
Alex Cheung - Fort Collins CO
Timothy J. Eggeman - Lakewood CO
William A. Evanko - Golden CO
Kevin H. Schilling - Arvada CO
Manfred Meiser - Arvada CO
Anthony E. Allen - Denver CO
Melville E. D. Hillman - Hilliard OH
George E. Cremeans - Groveport OH
Edward S. Lipinsky - Worthington OH

Assignee:

Chronopol, Inc. - Golden CO

International Classification:

C07D32100
C07D32110

US Classification:

549274

Abstract:

Disclosed is a novel integrated process for production of cyclic esters which includes recovery of starting materials, such as lactic acid from a dilute aqueous lactic acid-containing solution, by solvent extraction. The starting materials are then formed into cyclic esters by removal of water wherein the concentration of higher molecular weight oligomers is maintained below about 20 wt % of the reaction composition. The process further includes providing a recovery solvent for the reaction composition and separating the cyclic esters from the starting materials and higher molecular weight oligomers by liquid-liquid equilibrium separation. The present invention is further directed toward independent novel unit operations of the overall process. The present invention provides for the efficient production and recovery of cyclic esters due to integration of the various unit operations by use of appropriate solvents and recycle streams. In addition, high rates of conversion of starting materials and high rates of selective production of cyclic esters are achieved by appropriate control of process parameters.

US Patent:

40605116, Nov 29, 1977

Filed:

Jan 7, 1976

Appl. No.:

5/647247

Inventors:

Richard G. Sinclair - Columbus OH
George E. Cremeans - Groveport OH

Assignee:

The Goodyear Tire & Rubber Company - Akron OH

International Classification:

C08J 320

US Classification:

260 342

Abstract:

A free-flowing, homogeneous, polymer-coated pigment, particulate powder coating composition is obtained in preparing a coating composition involving catalytic polymerization of at least one ethylenically unsaturated monomer in a nonaqueous aliphatic hydrocarbon solvent for said monomer and in the presence of a dispersion stabilizer having a polymeric segment solvated by said solvent and another segment relatively non-solvated by the solvent and associated with polymer particles which are formed upon said polymerization of said monomer and which are insoluble in said solvent for providing a nonaqueous dispersion of said polymer particles, through a sequence of steps including: I. preparing said dispersion stabilizer in a solution containing a coalescing solvent which is an active solvent for said polymer particles; Ii. admixing a portion of the product of (i) with said pigment to form a pigment dispersion; Iii.

US Patent:

50970100, Mar 17, 1992

Filed:

Feb 4, 1991

Appl. No.:

7/651020

Inventors:

Richard A. Markle - Columbus OH
Phyllis L. Brusky - Columbus OH
George E. Cremeans - Groveport OH

Assignee:

Battelle Memorial Institute - Columbus OH

International Classification:

B29C 2500
C08G 6308

US Classification:

528390

Abstract:

Thermally-reversible polymer compositions are obtained by reacting compounds with isocyanate and labile-hydrogen functionality. High-performance characteristics are incorporated into the polymer by using polyimide, aromatic polycarbonate, aromatic polyester, polyphenylene sulfide, and poly(parabanic acid) oligomers. Low-temperature flexibility and toughness are imparted to the polymers by using prepolymers such as polycaprolactone diols, polytetramethylene ether glycols and polyaliphatic carbon diols. Ionic bonding and liquid-crystal functionality may also be incorporated into the compositions. The compositions are useful as hot-melt adhesives, coatings, and moldings and in injection reaction molding applications and composite and laminate fabrication.

US Patent:

43851649, May 24, 1983

Filed:

Nov 8, 1979

Appl. No.:

6/092595

Inventors:

Richard G. Sinclair - Columbus OH
David L. Berry - Columbus OH
George E. Cremeans - Groveport OH
Richard A. Markle - Columbus OH
Wesley M. Germon - Cuyahoga Falls OH

Assignee:

The Goodyear Tire & Rubber Company - Akron OH

International Classification:

C08F 220

US Classification:

526201

Abstract:

A block copolymer dispersion stabilizer for use in the aqueous dispersion polymerization of an ethylenically unsaturated monomer comprises at least two blocks linked by chemical valences. At least one of the blocks is hydrophilic (water soluble) and at least another of said blocks is hydrophobic (water insoluble). The hydrophobic block can contain a plurality of similar or dissimilar pendent groups having chemically reactive functionality. Examples of such groups are epoxy groups and ethylenically unsaturated bonds. An aqueous dispersion polymerization process utilizes water as the dispersion medium, a free-radical polymerization catalyst, a block copolymer dispersion stabilizer comprising at least two blocks linked by chemical valences wherein at least one of said blocks is hydrophilic and at least another of said blocks is hydrophobic and can contain a plurality of similar or dissimilar pendent groups having chemically reactive functionality, and a polymerizable ethylenically unsaturated monomer such as, for example, styrene, vinyl acetate, acrylonitrile, methyl methacrylate, butadiene, styrenebutadiene mixtures, and acrylonitrile-styrene mixtures.

US Patent:

53191072, Jun 7, 1994

Filed:

Mar 19, 1992

Appl. No.:

7/854559

Inventors:

Herman P. Benecke - Columbus OH
Alex Cheung - Ft. Collins CO
George E. Cremeans - Groveport OH
Melville E. D. Hillman - Hillard OH
Edward S. Lipinsky - Worthington OH
Richard A. Markle - Columbus OH
Richard G. Sinclair - Columbus OH

Assignee:

BioPak Technology, Ltd. - Golden CO

International Classification:

C07D31900
C07D31912

US Classification:

549274

Abstract:

Disclosed is a method for producing cyclic esters by the conversion of hydroxy carboxylic acids and their derivatives to their respective cyclic esters. Such cyclic esters, including lactide or glycolide, are particularly useful for producing polymers which can be used to make biodegradable materials, such as biodegradable packaging material. Various methods of cyclic ester production are disclosed, including liquid phase and vapor phase reactions. Also disclosed are various methods for recovering cyclic esters from product-containing streams.

US Patent:

54203040, May 30, 1995

Filed:

Sep 29, 1993

Appl. No.:

8/128797

Inventors:

Dan W. Verser - Golden CO
Alex Cheung - Fort Collins CO
Timothy J. Eggeman - Lakewood CO
William A. Evanko - Golden CO
Kevin H. Schilling - Arvada CO
Manfred Meiser - Arvada CO
Anthony E. Allen - Denver CO
Melville E. D. Hillman - Hilliard OH
George E. Cremeans - Groveport OH
Edward S. Lipinsky - Worthington OH

Assignee:

BioPak Technology, Ltd. - Golden CO

International Classification:

C07D31900
C07D31912

US Classification:

549274

Abstract:

Disclosed is a novel integrated process for production of cyclic esters which includes recovery of starting materials, such as lactic acid from a dilute aqueous lactic acid-containing solution, by solvent extraction. The starting materials are then formed into cyclic esters by removal of water wherein the concentration of higher molecular weight oligomers is maintained below about 20 wt % of the reaction composition. The process further includes providing a recovery solvent for the reaction composition and separating the cyclic esters from the starting materials and higher molecular weight oligomers by liquid-liquid equilibrium separation. The present invention is further directed toward independent novel unit operations of the overall process. The present invention provides for the efficient production and recovery of cyclic esters due to integration of the various unit operations by use of appropriate solvents and recycle streams. In addition, high rates of conversion of starting materials and high rates of selective production of cyclic esters are achieved by appropriate control of process parameters.

US Patent:

54709458, Nov 28, 1995

Filed:

Feb 3, 1994

Appl. No.:

8/193029

Inventors:

Richard A. Markle - Columbus OH
Phyllis L. Brusky - Columbus OH
George E. Cremeans - Groveport OH
Joel D. Elhard - Hilliard OH
Donald M. Bigg - Columbus OH
Sylvester Sowell - Columbus OH

Assignee:

Battelle Memorial Institute - Columbus OH

International Classification:

C08G 7500

US Classification:

528390

Abstract:

Thermally-reversible polymer compositions are obtained by reacting compounds with isocyanate and labile-hydrogen functionality. Aromatic polyimide, aromatic polycarbonate, polyarylsulfide, aromatic polyester with liquid crystal property, and polyarylimidazolidine oligomers are incorporated into the isocyanate or labile hydrogen compounds to give high-performance characteristics. Such thermally-reversible isocyanate-based polymer compositions with high-performance characteristics are useful, among other things, as finish surface coatings on composite materials such as polypropylene and polyethylene terephthalate. Novel phenolic-hydroxyl terminated polyarylsulfide and polyarylimidazolidine oligomers and their preparation are also described.