Catalyst composition for water blown, low density, rigid...

Details Catalyst composition for water blown, low density, rigid... Catalyst composition for water blown, low density, rigid...

2011-01-18

2011-01-18

Eashoo, Mark (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S117000, C521S118000, C521S129000, C521S170000

Reexamination Certificate

active

07872055

ABSTRACT:
A method for preparing a water blown, low density, rigid polyurethane foam which comprises contacting at least one polyisocyanate with at least one polyol, at an Isocyanate Index of 70 to 200, in the presence of a blowing agent composition comprising at least 75 wt % water and an effective amount of a catalyst composition comprising a gelling catalyst which is bis-(N,N-dimethylaminopropyl)amine and a blowing catalyst which is N,N-dimethylaminoethyl-N′-methyl-ethanolamine, the foam having a density of 6 to 16 Kg/m3.

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