Abstract

A new ultraviolet light cured material has been formulated as a temporary holding adhesive to mount or block glass lenses during the generating and polishing operations. This recently developed “blocking" material possesses unique properties in both the liquid and solid state. The product transforms from a liquid to solid through controlled exposure to low intensity ultraviolet light (20 to 30 mw/cm² at 365 nm).

In the liquid state the product rheology has been devised to ensure that it meets the needs of the end user. Upon solidification, this single component product has been designed to remain rigid at room temperature after it has been cured, and release (deblock) without solvents. This paper will quantify these product parameters by employing sophisticated polymer testing equipment. The results of dynamic mechanical analysis (DMA), thermal analysis and other engineering property tests will substantiate the product's performance demands in the liquid, semi-liquid and solid stages.

© 1992 Optical Society of America