Trifluorostyrene and substituted trifluorostyrene copolymeric compositions and ion-exchange membranes formed therefrom

Patent 5422411 Issued on June 6, 1995. Estimated Expiration Date:

September 21, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2651627

3282875

3341366

3528858

Trifluorostyrene sulfonic acid membranes
Patent #: 4012303
Issued on: 03/15/1977
Inventor: D'Agostino , et al.

Novel polymers having acid functionality
Patent #: 4330654
Issued on: 05/18/1982
Inventor: Ezzell , et al.

Method for preparation of graft polymeric membranes Patent #: 4605685
Issued on: 08/12/1986
Inventor: Momose , et al.

Inventors

Assignee

Ballard Power Systems Inc.

Application

No. 124924 filed on 09/21/1993

US Classes:

526/243, Fluorine-containing monomer contains a sulfur atom521/27, Membrane or process of preparing521/32, Treated with nitrogen-containing material521/33, Treated with sulfur-containing material526/242, From fluorine containing monomer526/247, Fluorine containing monomer is an ether526/248, Fluorine containing monomer contains nitrogen atom526/249, Fluorine containing monomer contains at least one diverse halogen atom526/291, From halogen containing monomer having at least three carbon atoms526/292.8, Halogen monomer is nitrile526/292.9, Halogen monomer contains an ether group526/292.95Halogen monomer contains a carboxylic acid, salt, or carboxylic acid amide

Examiners

Primary: Zitomer, Fred

Attorney, Agent or Firm

McAndrews, Held & Malloy, Ltd.

Foreign Patent References

53-26884 JP. 03/13/1978
3-27053 JP. 02/13/1991
327053 JP. 02/13/1991

International Classes

C08F 014/18
C08J 005/22

Abstract

Polymeric compositions are derived from copolymers of ଱,ଲ,ଲ-trifluorostyrene with a variety of substituted ଱,ଲ,ଲ-trifluorostyrenes. These compositions are suitable for use as membranes, particularly as ion-exchange membranes, and most particularly as solid polymer electrolytes in electrochemical applications, such as, for example, electrochemical fuel cells.

Other References

"Palladium-Catalyzed Cross-Coupling of Perfluoroalkenylzine Reagents with Aryl Iodides. A New, Simple Synthesis of ଱,ଲ,ଲ-Trifluorostyrenes and the Stereoselective Preparation of 1-Arylperfluoropropenes", J. Org. Chem., vol. 53, pp. 2714-2720, (1988)
"଱ଲଲ-Trifluorostyrene and polymers based on it", Russian Chemical Reviews, vol. 59, pp. 575-589, (1990