Non-fogging transparent coatings

Details Non-fogging transparent coatings Non-fogging transparent coatings

1991-06-19

1992-09-15

Lusignan, Michael

Optical: systems and elements

Protection from moisture or foreign particle

156 60, 359642, 427 2, 427338, 427164, 427165, 530356, 623 6, A61F 216

Patent

active

051483114

ABSTRACT:
A transparent, hydrophilic, non-fogging coating is applied to the surface of an object. The coating includes a bilaminar graft formed of two films. The first film, denoted the matrix, adheres to the surface of the object, and contains functional groups capable of chemically reacting with a mucopolysaccharide. The second film, denoted the hydrophil, contains the mucopolysaccharide. A quantity of ethylenedinitrilo-tetrakis-(2-hydroxypropane) is added to the matrix and to the hydrophil. Also added to the hydrophil are dimethyl sulfoxide (1%) and desulfated heparin (0.5%). The result is a permanent, transparent, hydrophilic, non-fogging coating. The coating can be formed on an intra-ocular lens or a contact lens, or on other objects. Also, the coating can be formed on a substrate to which the coating does not adhere permanently. The coating can then be separated from the substrate, stored, and later adhered to another surface.

REFERENCES:
patent: 4240163 (1980-12-01), Gala
patent: 4459317 (1984-07-01), Lambert
patent: 4663233 (1987-05-01), Beavers
patent: 4801475 (1989-01-01), Halpern et al.
patent: 5023114 (1991-06-01), Halpern et al.
patent: 5037677 (1991-08-01), Halpern et al.

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