Process for the manufacture of open-pore shaped articles of...

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

CPC

18/19

IPC codes

C08J 9/28 (2006.01)

Type

Patent

Patent number

CA 1051623

Description

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.

Application Number

221361

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