Single-dip process for achieving a layer-by-layer-like coating

Coating processes – With pretreatment of the base – Etching – swelling – or dissolving out part of the base

Reexamination Certificate

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C427S407100, C427S393500

Reexamination Certificate

active

07022379

ABSTRACT:
A method of forming a coating of polyionic materials in a layer-by-layer-like manner onto a polymeric material is provided. A polymeric material, such as a contact lens, can be dipped once into a solution of polyionic materials such that layers of polyionic material can be formed thereon. A single dip solution of the present invention typically contains a polyanionic material and a polycationic material in a non-stoichiometric amount and maintained within a certain pH range.

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