Resin foams

Details Resin foams Resin foams

1977-10-11

1981-11-10

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521917, C08G 1212

Patent

active

042999251

ABSTRACT:
Here is described the manufacture of a cured urea/formaldehyde resin foam having a shrinkage on drying of less than 20% by volume, by a method which includes the step of producing a homogeneous wet foam from an aqueous resin solution and an aqueous solution of a hardener for the resin, the freshly made wet foam having a total reactive resin solids content of at least 35% by weight. Apparatus for producing the cured resin foam includes a foaming column having upstream and downstream regions constituted by different inert materials.

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