Silicone resins used as surfactants in vinyl chloride foam
Abstract
Abstract A COMPOSITION COMPRISING A VINYL CHLORIDE POLYMER, A PLASTICIZER AND A SILICONE RESIN SELECTED FROM A SILICONE RESIN HAVING R3SIO1/2 MONOFUNCTIONAL UNITS AND SIO2 TETRAFUNCTIONAL UNITS WITH THE RATIO OF THE MONOFUNCTIONAL UNITS TO THE TETRAFUNCTIONAL UNITS BEING FROM 0.25 TO 0.75 WITH 3.0 TO 5.0% BY WEIGHT OF HYDROXYL GROUPS AND A SILICONE RESIN HAVING R''3SIO1/2 MONOFUNCTIONAL UNITS AND SIO2 TETRAFUNCTIONAL UNITS AND R22SIO DIFUNCTIONAL UNITS WITH THE RATIO OF MONOFUNCTIONAL UNITS TO TETRAFUNCTIONAL UNITS TO DIFUNCTIONAL UNITS BEING FROM 0.25-0.75 TO 1 TO 0.05-0.1 WITH 3.0 TO 5.0% BY WEIGHT OF HYDROXYL GROUPS AND WHEREIN R, R'', R2 ARE MONOFUNCTIONAL HYDROCARBON RADICALS. THE COMPOSITION IS MECHANICALLY FROTHED WITH AIR TO PRODUCE A FOAM WHICH IS THEN HEATED TO GEL AND FUSE THE FOAM. THERE IS PREFERABLY USED IN THE ABOVE COMPOSITION ONE OF THE ABOVE SILICONE RESINS WHICH HAS BEEN FURTHER TREATED SO THAT IT HAS LESS THAN ABOUT 0.5% BY WEIGHT OF HYDROXYL GROUPS. IN ADDITION, THERE IS PROVIDED A VERY EFFECIENT FOAMING AGENT WHICH IS PRODUCED BY ADDING ONE OF THE ABOVE SILICONE RESINS WITH A SELECTED CLASS OF PLASTE ICIZERS, SUCH AS DIOCTYL PHTHALATE.
Inventors
- 👤 E Simoneau
- 👤 R Moeller
- 👤 N Holdstock
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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