Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Reexamination Certificate
2007-03-20
2007-03-20
Cooney, Jr., John M. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
C521S129000, C521S130000, C521S170000
Reexamination Certificate
active
10724888
ABSTRACT:
The present invention relates to a method for preparing a polyurethane foam, which comprises reacting an organic polyisocyanate and a polyol in the presence of water as a blowing agent, a cell stabilizer, and an acid-blocked tertiary amino alkyl amide catalyst composition. The catalyst composition is represented by the formula I:wherein R1, R2, R3, R4, R5, R6, A, and n are as defined herein and wherein the tertiary amino alkyl amide catalyst of formula I is acid-blocked.
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Air Products and Chemicals Inc.
Cooney Jr. John M.
Leach Michael
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