| 摘要 |
<p>A process for rapidly hydrolyzing a cross-linked maleic anhydride/lower alkyl vinyl ether copolymer to a clear gel comprises (a) suspending or dispersing fine granules of the cross-linked copolymer in deionized water, (b) agitating the resulting dispersion or suspension for a period of 15 to 130 minutes at a temperature of 60° to 90 °C and then (c) cooling the hydrolyzed mixture, and (d) introducing a basic neutralizing agent at a temperature of 15° to 85 °C the product is a clear, homogeneous, hydrolyzed gel having a Brookfield viscosity of from 5,000 to 250,000 cps.</p> |
