Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1988-11-04
1990-03-13
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
528 73, 528 85, C08G 1818
Patent
active
049083945
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.
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Casey Jeremiah P.
Clift Susan M.
Air Products and Chemicals Inc.
Gourley Keith D.
Marsh William F.
Sergent Rabon
Simmons James C.
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