Fixed ophthalmic lens polishing pad

Details Fixed ophthalmic lens polishing pad Fixed ophthalmic lens polishing pad

1984-06-01

1986-03-18

Olszewski, Robert P.

Abrasive tool making process, material, or composition

Impregnating or coating an abrasive tool

51394, 51401, 51407, 51DIG34, B24D 1100

Patent

active

045766126

ABSTRACT:
A rosette shaped polishing pad includes a tough, flexible substrate, which is coated on one side with a layer of pressure sensitive adhesive for securing the pad to a polishing lap or the like, and on its opposite side with a flexible, water soluble matrix containing polishing particles such as cerium oxide, zirconium oxide, iron oxide, or the like, having a particle size in the range of approximately 0.5 to 15 microns. The polishing layer is produced by mixing a water soluble polyalkylene oxide/phenolic complex with an acrylic latex, and an alcohol slurry containing polishing particles in the form of, for example, cerium oxide particles. In use, water at any desired flow rate is applied to the interface between the lens which is being polished and the layer of polishing material on the pad. During the polishing operation the polyalkylene oxide/phenolic/acrylic binder or matrix slowly dissolves to release the polishing particles in a controlled manner thus providing a glass removal rate necessary to achieve an optical quality polished surface.

REFERENCES:
patent: 1507836 (1924-09-01), King
patent: 3042509 (1962-07-01), Soderberg
patent: 3125544 (1964-03-01), Winslow et al.
patent: 3306718 (1967-02-01), Chapin
patent: 3355272 (1967-11-01), D'Alessandro
patent: 4138228 (1979-02-01), Hartfelt et al.
patent: 4240807 (1980-12-01), Kronzer
patent: 4255164 (1981-03-01), Butzke et al.
patent: 4307544 (1981-12-01), Balz

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