Method for blocking a lens blank, adhesive composition and use of the latter in lens blocking

A new lens blocking material (adhesive composition 78) is proposed that essentially overcomes the drawbacks of previous blocking materials. This new material combines traditional UV and/or visible light (VIS) curable polymer materials with specially selected filler(s) as a non polymerizing solid in...

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1. Verfasser: Savoie, Marc
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description A new lens blocking material (adhesive composition 78) is proposed that essentially overcomes the drawbacks of previous blocking materials. This new material combines traditional UV and/or visible light (VIS) curable polymer materials with specially selected filler(s) as a non polymerizing solid in order to achieve or improve certain desirable material properties, including those of low shrinkage, low exothermic heat of polymerization, and improving the ability to deblock, while simultaneously reducing the high cost associated with such UV/VIS radiation curable materials. The new material is being used in methods for blocking a lens blank (54) onto a lens block (62) with a lens mounting face (64) that has a pre-determined block curve, in which the number of different block curves required to cover the full range of standard lenses is minimized.
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subjects ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE
ADHESIVES
CHEMICAL PAINT OR INK REMOVERS
CHEMISTRY
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS
COMPOSITIONS BASED THEREON
CORRECTING FLUIDS
DRESSING OR CONDITIONING OF ABRADING SURFACES
DYES
FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
FILLING PASTES
GRINDING
INKS
MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL
ORGANIC MACROMOLECULAR COMPOUNDS
PAINTS
PASTES OR SOLIDS FOR COLOURING OR PRINTING
PERFORMING OPERATIONS
POLISHES
POLISHING
PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSPORTING
USE OF MATERIALS AS ADHESIVES
USE OF MATERIALS THEREFOR
WOODSTAINS
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
title Method for blocking a lens blank, adhesive composition and use of the latter in lens blocking
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