Method for the preparation of an organohydrogenpolysiloxane as a

Details Method for the preparation of an organohydrogenpolysiloxane as a Method for the preparation of an organohydrogenpolysiloxane as a

1974-10-04

1977-03-08

Randolph, John D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 465G, 260 465H, 2604482E, 2604482H, C07D30100

Patent

active

040112470

ABSTRACT:
Starting from an organohydrogenpolysiloxane having at least two hydrogen atoms directly bonded to the silicone atoms, an organohydrogenpolysiloxane is obtained in which part of the silicon-bonded hydrogen atoms have been converted into organic groups and the remaining silicon-bonded hydrogen atoms are left unreacted. The starting organohydrogenpolysiloxane is brought to the partial addition reaction with less than equivalent amount of an organic unsaturated compound having aliphatic double bond in the molecule in the presence of a platinum catalyst, and the reaction mixture is subjected to distillation while the platinum catalyst is deactivated by added benzothiazole or derivatives thereof, thus providing for the production of the organohydrogenpolysiloxane of the invention in reproducibly in high yield. The compounds are useful as crosslinking agents in the manufacture of various silicone products.

REFERENCES:
patent: 2970150 (1961-01-01), Bailey
patent: 3663181 (1972-02-01), Shannon
patent: 3666813 (1972-05-01), Hindin et al.

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