Silicone resins used as surfactants in vinyl chloride foam

摘要: A COMPOSITION COMPRISING VINYL CHLORIDE POLYMER, PLASTICIZER AND SILICONE RESIN SELECTED FROM HAVING R3SIO1/2 MONOFUNCTIONAL UNITS SIO2 TETRAFUNCTIONAL WITH THE RATIO OF TO BEING 0.25 0.75 3.0 5.0% BY WEIGHT HYDROXYL GROUPS R''3SIO1/2 R2**2SIO DIFUNCTIONAL 0.25-0.75 1 0.05-0.1 WHEREIN R, R'', R2 ARE HYDROCARBON RADICALS. IS MECHANICALLY FROTHED AIR PRODUCE FOAM WHICH THEN HEATED GEL FUSE FOAM. THESE PREFERABLY USED IN ABOVE ONE RESINS HAS BEEN FURTHER TREATED SO THAT IT LESS THAN ABOUT 0.5% GROUPS. ADDITION, THERE PROVIDED VERY EFFICIENT FOAMING AGENT PRODUCED ADDING SELECT CLASS PLASTICIZERS, SUCH AS DIOCTYL PHTHALATE.