Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1976-06-24
1977-11-01
Marquis, Melvyn I.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 465R, 260 465G, 260824R, C08L 9100
Patent
active
040564924
ABSTRACT:
A process for the production of a bodied silicone resin without the use of a catalyst comprising first hydrolyzing the organohydrosilanes in a homogeneous hydrolysis medium composed of water and acetone, removing the acid/water layer, adding at least 10% by weight of water based on the silicone resin hydrolyzate and heating the resulting mixture to at least 130.degree. C and more preferably at a temperature range from 140.degree. C to 160.degree. C. After this bodying step, water constituting at least 10% by weight of the silicone resin hydrolyzate as well as water-immiscible organic solvent may be added to the silicone hydrolyzate and the resulting mixture heated at elevated temperatures so as to remove all the water and acetone. This procedure of adding water may be repeated until the silicone resin hydrolyzate has an acid content that does not exceed 5 parts per million. The silicone resin of the instant case may be prepared as 100% solids or at a concentration of 70 to 95% solids in a water-immiscible organic solvent.
REFERENCES:
patent: 3489782 (1970-01-01), Pruvost et al.
patent: 3865766 (1975-02-01), Merrill
General Electric Company
Koltos E. Philip
Marquis Melvyn I.
Neuhauser Frank L.
Voss D. J.
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