Metalation and functionalization of polymers and copolymers

Details Metalation and functionalization of polymers and copolymers Metalation and functionalization of polymers and copolymers

1997-06-05

1998-12-15

Lipman, Bernard

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

5253333, 525354, 5253591, 5253593, 5253595, 5253596, 525383, 525385, 525386, C08F 842

Patent

active

058498281

ABSTRACT:
There is provided a method of introducing functionality into a copolymer of an isoolefin and an alkylstyrene at the alkylbenzyl carbon atom comprising the steps of: forming a solution of said copolymer in a hydrocarbon solvent; adding to said polymer solution an alkali metal Cs, K, Na alkoxide and an alkyl lithium compound to form a superbase with the polymer solution; and adding an electrophile to said base polymer solution also provided are the metalated copolymers and the functionalized derivative therefrom.

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patent: 5162445 (1992-11-01), Powers et al.
Harris, Jr. et al., "Block and Graft Copolymers of Pivaloactone. 5. Graft Copolymers from Pivalolactone and Isobutylene", Macromolecules, 19, 2903-8, (1986).
Lochmann et al., "Preparation of Organopotassium Compounds", J. Organometallic Chemistry, 28, 153-158 (1971).
L. Lochmann et al., "Lithium-Potassium Exchange in Alkyllithium-Potassium t-Pentoxide Systems", J. Organometallic Chemistry, 326, 1-7 (1987).
L. Lochmann et al., "More Efficient Metallation of Alkylbenzenes by Modified Superbases from Butyllithium and Potassium Alkoxides Structure and Concentration", Tetrahedron Letters, 32 (11), 1483-83 (1991).
Lochmann et al., "Globular polyethers with Internal functionalization by Metalation of Dendrimers and Reaction with Electrophiles", Polym. Mat. Sci. Eng., 69, 426-7 (1993).
L. Lochmann, et al., A Novel Approach to Graft Copolymers via the Metalation of Polystyrene by Superbase and Reaction with Electropiles., Polymer Preprints, 34(2), 588-9 (1993).

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