Process for manufacturing porous polymer
US4742086A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1986 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Oct 24, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/16
- WIPO fieldMedical technology
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.