| 摘要 |
<p>URETHANE ELASTOMER FOR PRINTING BELTS A process for making an elastomer for use in printing/drive belts is disclosed wherein a mixture of approximately 2 equivalents of toluene diisocyanate consisting of about 88 wt.% of the 2,4 isomer and 12 wt.% of the 2,6 isomer is reacted with a polyether or polyester having difunctional primary hydroxyl groups to form a prepolymer. The prepolymer is then reacted with a diamine curing agent to form the elastomer.</p> |
