Patent ID: 7138132

Claim:
Hydrogel-forming system which comprises hydrophobic and hydrophilic components (A) and (B) which are convertible into a one phase crosslinked network structure by free radical polymerization, where the hydrophobic and hydrophilic components constitute different compounds from one another, the hydrophobic component (A) being a hydrophobic macromer with unsaturated group terminated ends, and the hydrophilic component (B) being a hydrophilic polymer which is a polysaccharide containing hydroxy groups which are reacted with unsaturated group introducing compound, the hydrogel-forming system comprising from 0.01 to 99.99% by weight of (A) and from 99.99 to 0.01% (B), with the total of the percentages of (A) and (B) leaving 100%.