Open celled foam and method of making an open celled foam

Details Open celled foam and method of making an open celled foam Open celled foam and method of making an open celled foam

1997-08-20

1998-06-23

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521183, 521184, 521189, C08J 902, C08G 1834

Patent

active

057706360

ABSTRACT:
A lightweight open celled foam, having a density no greater than 6 pounds per cubic foot (pcf) and a ratio of imide to amide groups greater than 1 to 1 and no greater than 19 to 1, is the reaction product made from an organic polyisocyanate having at least two functional groups per molecule and a mixture of a difunctional acid and a difunctional anhydride in the presence of a tertiary amine catalyst and a nonionic, organic surfactant having a hydrophilic/lipophilic balance (HLB) of at least 12, with the reactants generating carbon dioxide during the manufacturing process.

REFERENCES:
patent: 4604409 (1986-08-01), Gagliani et al.
patent: 5093457 (1992-03-01), Zechier et al.

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