Process for manufacturing porous polymer
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United States of America Patent
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May 3, 1988
Grant Date -
N/A
app pub date -
Oct 24, 1986
filing date -
Nov 2, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides a process for manufacturing a porous polymer containing many voids in its interior, which has a small apparent specific gravity and is superior in terms of water absorbing properties, permeability and elasticity. The process comprises (1) forming O/W emulsion by using a water soluble surfactant wherein an inner phase of the O/W emulsion is a hydrophobic phase and an outer phase thereof is a water phase containing at least one water-soluble polymerizable monomer; (2) adding said O/W emulsion to a hydrophobic dispersing medium containing an oil-soluble surfactant to form O/W/O emulsion; and (3) polymerizing the monomer.
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