Surface modified polymeric materials, modified functionalized polymers, functional polymers, and methods
AssigneeCelgard, LLC
InventorsKristoffer K. Stokes, Karl F. Humiston
Life of this patent
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Abstract
The present invention relates to new, improved or modified polymer materials, membranes, substrates, and the like and to new, improved or modified methods for permanently modifying the physical and/or chemical nature of surfaces of the polymer materials, membranes, or substrates for a variety of end uses or applications. For example, one improved method uses a carbene and/or nitrene modifier to chemically modify a functionalized polymer to form a chemical species which can chemically react with the surface of a polymer substrate and alter its chemical reactivity. Furthermore, this invention can be used to produce chemically modified membranes, fibers, hollow fibers, textiles, and the like.
Claims10
In a battery separator, the improvement comprising a modified substrate comprising:
- a microporous polyolefin substrate having a surface, and
- a modified functionalized polymer (A-B) coated on the surface of the substrate to form a modified substrate, the modified functionalized polymer A-B consists of a functionalized polymer (component A) and a cross-linking component (component B),
- the modified functionalized polymer A-B is tethered to the polyolefin substrate via a covalent bond formed from a nitrene insertion reaction between B and the polyolefin,
- the component A comprises ethylene oxide, and
- the modified functionalized polymer A-B is coated on the surface of the substrate in an amount of from about 0.05 g/m2 to about 1.0 g/m2, and the modified functionalized polymer A-B having a weight ratio of component A to component B of from 0.5:1 to 200.0:1.
Dependencies are inferred from the claim text.