Porous polyisocyanate polyaddition products

Details Porous polyisocyanate polyaddition products Porous polyisocyanate polyaddition products

2006-05-30

2011-11-29

Cooney, John (Department: 1765)

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C521S113000, C521S130000, C521S170000

Reexamination Certificate

active

08067480

ABSTRACT:
Process for producing porous polyisocyanate polyaddition products by reacting (a) isocyanates with (b) compounds which are reactive toward isocyanates in the presence of (f) solvent, wherein compounds having a functionality toward isocyanates of at least 6 and a molecular weight of at least 1000 g/mol are used as (b) compounds which are reactive toward isocyanates.

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