Thomas S Stevenson

US Patent:

6346596, Feb 12, 2002

Filed:

Jul 14, 2000

Appl. No.:

09/616780

Inventors:

Thomas R. Mallen - Zelienople PA
Thomas A. Stevenson - Midland GA

Assignee:

Valspar Corporation - Minneapolis MN

International Classification:

C08G 6300

US Classification:

528176, 528179, 528190, 528193, 528194, 528211, 528219, 528274, 528302, 528361, 528365, 524186, 524366, 524379, 4272071, 428480, 264239, 26433111

Abstract:

A gas barrier polymer composition with active hydrogen functionality is provided. The polymer may be prepared by reacting a solution of organic diacid containing at least one active hydrogen group and diglycidyl ether in the presence of an optional catalyst. The pressure, temperature, and time parameters of the reaction are preferably regulated to prevent degradation and subsequent incorporation of degradation products of organic diacid containing at least one active hydrogen group into the gas barrier polymer composition. A formulation of the gas barrier polymer composition and a carrier may be used to coat plastic materials, containers, and preforms. The gas barrier polymer composition may also be employed in a method of making multilayer packaging materials or container preforms. The multilayer packaging materials or preforms can be used to make containers useful in packaging gas sensitive substances.

US Patent:

20060079650, Apr 13, 2006

Filed:

Oct 12, 2004

Appl. No.:

10/962800

Inventors:

Thomas Stevenson - Pittsburgh PA, US
Ramesh Subramanian - Coraopolis PA, US
Rick Starcher - Monaca PA, US
Larry Smedley - Pittsburgh PA, US
Homer Dove - Oakdale PA, US

International Classification:

C08G 63/127
C08G 63/12

US Classification:

525440000

Abstract:

Powder coatings having good impact resistance and weatherability characteristics are produced with an isophthalic acid-based polyester and an isocyanate-based curing agent.

US Patent:

60874171, Jul 11, 2000

Filed:

Jan 16, 1998

Appl. No.:

9/008205

Inventors:

Thomas A. Stevenson - Pittsburgh PA
Larry Brandenburger - Lino Lakes MN
William McCarty - Lancaster VA
John Mazza - Cheswick PA
Jeffrey Niederst - Pittsburgh PA

Assignee:

The Valspar Corporation - Minneapolis MN

International Classification:

C08G 5916
C08K 320
C08L 6310

US Classification:

523414

Abstract:

The invention provides aqueous, solvent based, and solvent-free curable coating compositions which include (A) the reaction product of epoxy resin, acid, and tertiary amine; (B) reactive diluent, and, optionally, (C) curing agent. The compositions are useful for forming cured coated substrates, that are especially suitable for food and beverage packaging.

US Patent:

63004283, Oct 9, 2001

Filed:

Jan 27, 2000

Appl. No.:

9/492407

Inventors:

Thomas A. Stevenson - Pittsburgh PA
Larry Brandenburger - Lino Lakes MN
William McCarty - Lancaster VA
John Mazza - Cheswick PA
Jeffrey Niederst - Pittsburgh PA

Assignee:

The Valspar Corporation - Minneapolis MN

International Classification:

C08G 5916
C08K 320
C08L 6302
C08L 6310

US Classification:

525532

Abstract:

The invention provides aqueous, solvent based, and solvent-free curable coating compositions which include (A) the reaction product of an epoxy resin, acid, and tertiary amine; (B) a reactive diluent, and, optionally, (C) a curing agent. The compositions are useful for forming cured coated substrates, that are especially suitable for food and beverage packaging.