Claims
- 1. A method for producing fluorosilicone polymers, comprising:reacting an organic chain-stopping compound in the presence of a first alkali silanolate, with a fluorosilicone trimer of the formula: wherein R1 is a monovalent hydrocarbon of 1-8 atoms, R2 is a perfluoroalkylethylene radical of 3-8 carbon atoms, forming a polymer solution containing a first polymer; and adding a hexaorganosiloxane and a rearrangement catalyst to said polymer solution.
- 2. The method according to claim 1, wherein said organic chain-stopping compound is a triorganosilanol.
- 3. The method according to claim 1, wherein said organic chain-stopping compound is of the formula: whereinR3 is a monovalent hydrocarbon radical of 1-8 carbon atoms, R2 is a perfluoroalkylethylene radical of 3-8 carbon atoms, and z is an integer of about 2 to 10.
- 4. The method according to claim 1, wherein said rearrangement catalyst is linear phosphonitrilic chloride.
- 5. The method according to claim 2, wherein said hexaorganodisiloxane is hexamethyldisiloxane.
Parent Case Info
This is a divisional of now abandoned application Ser. No. 09/574,968 filed on May 19, 2000, which is a division of Ser. No. 09/224,336, now abandoned, filed Dec. 31, 1998.
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