Energy absorbing flexible foams produced in part with a...

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...

Reexamination Certificate

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C521S130000

Reexamination Certificate

active

07094811

ABSTRACT:
Energy absorbing flexible foams can be produced by reacting an isocyanate with a first polyol, prepared at least in part by an active double metal cyanide catalyst and a second polyether polyol is prepared at least in part by a basic or acidic catalyst.

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