BLOCK COPOLYMERS OF SILICONES WITH VINYL PYRIDINE

• US 3,673,272 A
• Filed: 04/06/1970
• Issued: 06/27/1972
• Est. Priority Date: 04/06/1970
• Status: Expired due to Term

• Current Assignee: John W. Dean
• Original Assignee: John W. Dean
• Inventors: Dean, John W.
• Primary Examiner(s): Blech, Samuel H.
• Application Number:
  US05/026,081
• Time in Patent Office: 813 Days
• Field of Search: 260/827
• US Class Current: 525/103
• CPC Class Codes: B01D 71/80 Block polymers
• CPC Class Codes: C08F 297/02 using a catalyst of the anionic type
• CPC Class Codes: C08G 77/442 containing vinyl polymer sequences
• CPC Class Codes: Y10S 260/16 Antistatic agents containing a metal, silicon, boron or phosphorus
• CPC Class Codes: Y10S 525/911 Polymer from ethylenic monomers only, having terminal functional group other than unsaturation
• CPC Class Codes: Y10S 525/916 Polymer from ethylenic monomers only, having cationic group
• CPC Class Codes: Y10S 525/917 Polymer from at least one nonethylenic monomer having cationic group
• CPC Class Codes: Y10S 8/01 Silicones

Abstract

Block copolymers of silicones with vinyl pyridine having the formula:

WHEREIN A IS AT LEAST 25, B IS AT LEAST 10, C IS 1 OR MORE, AND R is selected from the class consisting of methyl and phenyl. The materials are useful for the formation of permselective membranes and allow the solubilization of silicones in a polar solvent.

Claims

2. The block copolymer of claim 1 wherein a is 50 to 500, and b is from 10 to 500.

3. The block copolymer of claim 2 wherein c is from 3 to 10.

4. The block copolymer of claim 1 wherein the vinyl pyridine moiety is 2-vinyl pyridine.

5. The block copolymer of claim 1 wherein R is methyl.