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US 11,732,135 B2Granted
Photocurable silicone composition
AssigneeDow Silicones Corporation
InventorsGyuyoung Lee, Juyoung Yook
Life of this patent
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Abstract
A photocurable silicone composition is disclosed. The composition comprises 4,5,6,7-tetrachloro-3′,6′-dihydroxy-2′,4′,5′,7′-tetraiodospiro[2-benzofuran-3,9′-xanthen]-1-one as a photochromic pigment. The photochromic pigment is present in an amount of from about 0.001 to about 0.05 mass % of a total amount of the composition. The composition can indicate a cure point thereof by disappearance of color.
Claims8
A photocurable silicone composition, the composition comprising:
- 4,5,6,7-tetrachloro-3′,6′-dihydroxy-2′,4′,5′,7′-tetraiodospiro[2-benzofuran-3,9′-xanthene]-1-one as a photochromic pigment, and present in an amount of from about 0.001 to about 0.05 mass % of a total amount of the composition;
- and
- a photoinitiator, which is different from the photochromic pigment;
- wherein the photochromic pigment imparts a color to the photocurable silicone composition;
- and
- wherein the photocurable silicone composition indicates a cure point thereof by disappearance of the color imparted by the photochromic pigment.
3 more elements
Dependencies are inferred from the claim text.