Susan S Clift

US Patent:

49373064, Jun 26, 1990

Filed:

Nov 2, 1988

Appl. No.:

7/266463

Inventors:

Jeremiah P. Casey - Emmaus PA
Susan M. Clift - North Wales PA
Kenneth M. Kem - Old Zionsville PA

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

C08G 1818
C08G 1820

US Classification:

528 73

Abstract:

The present invention relates to a process for the production of polyurethanes wherein a tertiary amine functionality is incorporated into the side chain of an aromatic diamine, preferably a diaminobenzamide, to form a catalytic polyurethane chain extender. These chain extenders are polyurethane catalysts that provide adequate cure without residual odor and safety hazards associated with the more traditional tertiary amine catalysts. When reacted with the isocyanate reactive group the non-tertiary amine portion of the chain extender is bound to the polymeric network. Diffusion of the catalyst species from the polyurethane has been prevented, thus negating odor and toxicity as problems. The aromatic diamine provides enhanced polyurethane physical properties.

US Patent:

49083945, Mar 13, 1990

Filed:

Nov 4, 1988

Appl. No.:

7/267217

Inventors:

Jeremiah P. Casey - Emmaus PA
Susan M. Clift - North Wales PA

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

C08G 1818

US Classification:

521163

Abstract:

The present invention relates to a process for the production of polyurethanes wherein a tertiary amine functionality is incorporated into the side chain of a diaminobenzoate to form catalytic polyurethane chain extender. These chain extenders are polyurethane catalysts which provide adequate cure without residual odor and safety hazards associated with the more traditional tertiary amine catalysts. When reacted with the isocyanate reactive group the non-tertiary amine portion of the chain extender is bound to the polymeric network thereby preventing diffusion of the catalyst species from the polyurethane and negating odor and toxicity as problems. The diaminobenzoate provides enhanced polyurethane physical properties.

US Patent:

54534780, Sep 26, 1995

Filed:

May 4, 1993

Appl. No.:

8/028494

Inventors:

Kevin R. Lassila - Allentown PA
Michael E. Ford - Coopersburg PA
Kenneth M. Kem - Emmaus PA
Susan M. Clift - Lansdale PA

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

C08G 1810

US Classification:

528 64

Abstract:

This invention relates to o-tolidines which have a tert-butyl substituent ortho to an amine group. These compositions are represented by the formula: ##STR1## where R. sub. 1 =i-propyl, or t-butyl, and where R. sub. 2 =hydrogen, i-propyl, or t-butyl. The compositions are useful in the preparation of polyepoxide resins as well as polyurethanes, polyamides and polyimides.

US Patent:

50344269, Jul 23, 1991

Filed:

Jan 22, 1990

Appl. No.:

7/468410

Inventors:

Jeremiah P. Casey - Emmaus PA
Susan M. Clift - North Wales PA
Kenneth M. Kem - Old Zionsville PA

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

C08G 1818
C08G 1832

US Classification:

521163

Abstract:

The present invention relates to a process for the production of polyurethanes wherein a tertiary amine functionality is incorporated into the side chain of an aromatic diamine, preferably a diaminobenzamide, to form a catalytic polyurethane chain extender. These chain extenders are polyurethane catalysts that provide adequate cure without residual odor and safety hazards associated with the more traditional tertiary amine catalysts. When reacted with the isocyanate reactive group the non-tertiary amine portion of the chain extender is bound to the polymeric network. Diffusion of the catalyst species from the polyurethane has been prevented, thus negating odor and toxicity as problems. These aromatic diamines provide enhanced polyurethane physical properties.

US Patent:

48107697, Mar 7, 1989

Filed:

Jun 5, 1987

Appl. No.:

7/058439

Inventors:

Jeremiah P. Casey - Emmaus PA
Susan M. Clift - North Wales PA
Barton Milligan - Coplay PA

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

C08G 1814
C08G 1810
C08G 1832

US Classification:

528 64

Abstract:

The present invention relates to polyurethanes and a method for making polyurethanes by reacting an organic diisocyanate, a glycol having a molecular weight of 500-5000 and a derivative of 2,6-diaminobenzoic acid or a blend comprising derivatives of 2,4-diaminobenzoic acid and 2,6-diaminobenzoic acid. The addition of the 2,6-diaminobenzoic acid derivative to the composition improves polyurethane processability and performance by decreasing chain extender reactivity and increasing hard segment regularity.