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US 5,011,513 AGranted
Single step, radiation curable ophthalmic fining pad
AssigneeNorton Company
InventorsEugene Zador, Shyiguei Hsu, Wesley R. Kaczmarek, Sitaramaiah Ravipati, Stanley Supkis, Richard H. Vogel
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Abstract
A single step fining pad for use in a ophthalmic applications having radiation cured maker and size coats of different hardnesses.
Claims23
A coated abrasive material suitable for use as a single step fining pad comprising:
- a flexible and dimensionally stable backing member;
- an abrasive adhered to one surface of said backing member by a maker coat adhered to said backing member;
- and
- an ultraviolet radiation-cured size coat overlying said abrasive grains and further adhering said abrasive grains to the maker coat, said size coat comprising a multifunctional urethane oligomer reinforced with an ultraviolet radiation transparent particulate filler having a hardness at least as great as silica.
1 more element
Process for the manufacture of coated abrasive material suitable for use as a single step fining pad comprising the following steps:
- (a) providing a maker coat having as the main ingredients a combination of radiation curable monomers having mono- and multi-functionality and an acrylated oligomer;
- (b) applying said maker coat onto a backing member;
- (c) applying a layer of abrasive grains to said maker coat by electrostatic means whereby to properly orient the abrasive grains for best cutting and finishing performance;
- (d) at least partially curing said maker coat by a suitable UV light source;
- (e) providing a size coat having as its main ingredients a combination of radiation curable monomers having mono- and multi- functionality and an acrylated urethane oligomer;
- (f) applying said size coat to said layer of abrasive grains and curing said maker and size coats whereby to provide a layer having a Knoop hardness greater than that of the maker coat.
3 more elements
Dependencies are inferred from the claim text.