| 摘要 |
Two-component dental impression materials based upon polyvinylsiloxane elastomers include a catalyst paste which comprises up to 20,000 ppm of finely-divided platinum black, which functions to adsorb hydrogen gas generated on reaction of the catalyst paste when mixed with a base paste containing hydrofunctional polydimethylsiloxane. The said paste desirably further contains a hydrophilic surfactant. |
