Continuous process for varying molecular weight of organopolysil

Details Continuous process for varying molecular weight of organopolysil Continuous process for varying molecular weight of organopolysil

1985-08-19

1986-07-08

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

556456, 528 16, 528 12, 528 23, C07F 708

Patent

active

045994374

ABSTRACT:
In a process for varying the molecular weight of linear or cyclic organopolysiloxanes in the presence of a catalyst which is solid in the reaction mixture at the reaction temperature, the improvement comprising that the catalyst which is solid in the reaction mixture at least at the respective reaction temperature and the organopolysiloxane whose molecular weight is to be changed are continuously and simultaneously passed through a heated cylindrical reactor whose contents is mechanically moved, the reactor having a length to inside diameter ratio of 1:1 to 20:1 and its interior pressure being held at 50 to 500 hPa (abs.) and the catalyst is removed from the mixture after leaving the reactor.

REFERENCES:
patent: 2467976 (1949-04-01), Hyde
patent: 3274154 (1966-09-01), Kendrick et al.
patent: 3853934 (1974-12-01), Sicilliano et al.
patent: 3937684 (1976-02-01), Razzano
patent: 4426508 (1984-01-01), Dromard et al.

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