Transetherification process

Details Transetherification process Transetherification process

1985-01-29

1986-10-14

Shaver, Paul F.

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

Organic compounds

Silicon containing

556469, C07F 708, C07F 718

Patent

active

046174125

ABSTRACT:
A process for the transetherification of silyl ethers comprises reacting the silyl ether with a hydroxyl containing compound in the presence of a Lewis base containing catalyst. Preferably, the Lewis base containing catalyst is (1) an amidine, (2) a Lewis base in the presence of an epoxide or (3) a trivalent organophosphorus compound in the presence of an activated alkene or alkyne. The Lewis base containing catalyst can either be used in a homogeneous form, soluble in the reactants, or in a heterogeneous form, insoluble in the reactants, having the Lewis base containing catalyst supported on an inert solid. An application of the catalysts is in the production of polydimethylsiloxane polyether block copolymers by reaction of a polydimethylsiloxane silyl ether with a polyether monol.

REFERENCES:
patent: 3133111 (1964-05-01), Wheeler
patent: 3976675 (1976-08-01), Scott et al.
patent: 4097406 (1978-06-01), Scott et al.
patent: 4172186 (1979-10-01), Scott et al.
patent: 4357473 (1982-11-01), Knollmueller

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