Polycyclosiloxanes containing silacyclobutane

Details Polycyclosiloxanes containing silacyclobutane Polycyclosiloxanes containing silacyclobutane

1989-10-16

1991-05-21

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 37, 528 40, 556450, C08G 7706

Patent

active

050176714

ABSTRACT:
This invention describes a polycyclosiloxane of the formula ##STR1## where R.sup.a, R.sup.b, and R.sup.c are independently monovalent radicals; x is an integer equal to or greater than 3, y is equal to or greater than 0, and x plus y is greater than 3. A process for the production of the polycyclosiloxane above consisting essentially of (A) adding a solvent solution of 1,1-dichlorosilacyclobutane, and optionally dichlorodiorganosilane, to a mixture of water and solvent with rapid stirring at room temperature at a rate which does not cause the mixture to raise in temperature, (B) washing with water, (C) drying with MgSO.sub.4, (D) filtering, and (E) removing the solvent. Methods of using the polycyclosiloxane of silacyclobutane as an ingredient in a silicone composition which cures on exposure to moisture to give an elastomer is claimed, as is the composition produced.

REFERENCES:
patent: 3046291 (1962-07-01), Sommer
patent: 3719696 (1973-03-01), Jonas et al.

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