Cure-indicating molding and coating composition

Details Cure-indicating molding and coating composition Cure-indicating molding and coating composition

C - Chemistry, Metallurgy

08

L

C08L 83/07 (2006.01) C08J 3/24 (2006.01) C09B 62/00 (2006.01) C09B 69/10 (2006.01)

Patent

CA 2192188

The present invention provides novel hydrosilation-curable compositions, the cure of which can be monitored visually, comprising: (I) an ethylenic compound; (2) a compound containing silicon-bonded-hydrogen groups; (3) a hydrosilation catalyst; and (4) one or more cure-indicating dyes with light absorption in the visible spectrum that exhibit a color change in the presence of a silicon-bonded-hydrogen compound and a precious metal hydrosilation catalyst. The cure-indicating dye provides the composition with an initial pre-cure color and a different post-cure color. As a result of this change in color, the state of cure of the composition can be visually monitored.

La présente invention concerne de nouvelles compositions polymérisables par hydrosilylation, dont la polymérisation peut être contrôlée visuellement, et comprenant: (1) un composé éthylénique; (2) un composé contenant des groupes hydrogène à liaison silicium; (3) un catalyseur d'hydrosilylation; et (4) un ou plusieurs colorants révélant la polymérisation, absorbant la lumière dans le spectre visible et présentant un changement de teinte en présence d'un composé hydrogène à liaison silicium et d'un catalyseur d'hydrosilylation en métal précieux. Le colorant révélant la polymérisation confère à la composition une teinte initiale avant polymérisation et une teinte différente après polymérisation. Ce changement de teinte permet de contrôler visuellement l'état de polymérisation de la composition.

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