Method of indicating a cure point for ultraviolet radiation curing compositions by color change

U.S. Patent Number: 5302627

Abstract: Adding a dye with a visible color to an ultraviolet radiation curable composition which contains a photoinitiator which generates free radicals upon exposure to ultraviolet radiation produces a composition which changes visible color upon exposure to ultraviolet radiation. This visible color change indicates that the composition has cured. This cure indication is useful for compositions curable by ultraviolet radiation in the electronics and electrical industry.

Inventors: Field; Arthur J. (Kawkawlin, MI); Strong; Michael R. (Midland, MI)

Assignee: Dow Corning Corporation (Midland, MI)

Application Number: 07/848,579

Issued: 1994-04-12

Expired: 2006-04-12

Classes: 522/13 ; 522/16; 522/26; 522/42; 522/48; 522/75; 522/96; 522/99

Field of search: 522/21,48,99,13,75,96,26,42

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