Silicone condensation and/or equilibration catalyst and use

Details Silicone condensation and/or equilibration catalyst and use Silicone condensation and/or equilibration catalyst and use

1995-12-14

1996-12-17

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

528 23, 502158, 502200, 502208, C08G 7706

Patent

active

055854516

ABSTRACT:
A silanol condensation-equilibration catalyst is provided in the form of a mixture of a linear phosphonitrilic chloride and an effective amount of a protic acid having a pKa.ltoreq.5, such as HCl. A material capable of generating a protic acid in situ during equilibration, such as an organohalosilane, is also effective.

REFERENCES:
patent: 2990419 (1961-06-01), Nitzsche et al.
patent: 3839388 (1974-10-01), Nitzsche et al.
Molenberg et al, Macromol. Rapid Commun. 16, 449-453 (1995).

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