| |
 |
 |
 |
Our gel products, SPUGs
(Segmented Polyurethane Gels) are unique materials, of which molecular
structure is designed as one component and permanent gels, which
are composed of three-dimensionally cross-linked polyurethane with
segments that are liquid state at ambient temperatures, while general
gel materials consist of two or more chemical components composed
of network polymers and dispersive media. Water is the dispersive
medium in the hydrogel, and organic oil or solvents are used as
media in organic gels, so that hydrogels naturally dry into xerogels
with vaporizing water and organic gels easily bleeds out media
and gradually degenerates with time. In contrast, SPUGs have liquid
segmental chains in network polymers and hold gel (quasi-solid
or quasi-liquid) state permanently.
The figure illustrates the morphologies of swollen gels. (C) displays
the SPUG gels compared with general hydrogels or organic gels (A)
and polyelectrolyte gels (B). The followings show two existing products
of SPUGs for use in medical applications; despite they have potentiality
of other industrial applications. |
 |
|
| |
 |
|
