C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/19
C08J 9/28 (2006.01)
Patent
CA 1051623
ABSTRACT OF THE DISCLOSURE Starch products which were hitherto used as pore-forming substances in the manufacture of polyvinyl alcohol acetal sponges are replaced by polyethylene glycol or polyacrylamide. This results in a more uniform distribution of pore size, lower shrinkage of the sponge material during the acetalisation, and easier washing of the sponge after the acetalisation.
221361
Schindler Hermann
Zimmermann Wolfgang
Hoechst Aktiengesellschaft
Na
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