Catalyst for polymerization of organosiloxanes

Details Catalyst for polymerization of organosiloxanes Catalyst for polymerization of organosiloxanes

1991-01-29

1992-02-18

Garvin, Patrick P.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

502164, C08F 400

Patent

active

050894501

ABSTRACT:
The process of producing a catalyst for polymerization of organosiloxanes comprises heat-treating a mixture of an aqueous solution of a tetraalkylphosphonium hydroxide, such as tetramethylphosphonium hydroxide, and a cyclic or noncyclic siloxane component, thereby controlling the water content of the system so that the molar ratio of the amount of water in the system to the amount of the quaternary phosphonium hydroxide component in the system will be from 3.0 to 4.0. The process ensures that the crystallization of the tetraalkylphosphonium hydroxide component in the catalyst is obviated effectively.

REFERENCES:
patent: 4888405 (1989-12-01), Gamon et al.

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