Curable silicone compositions incorporating a fluorescent detection system
AssigneeHenkel Corporation
InventorsMichael P. Levandoski, Hsien-Kun Chu, Richard Corrao
Life of this patent
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Abstract
The present invention relates to curable silicone compositions which include a fluorescent agent for detection purposes and which have a cure system which enables the silicone compositions to possess improved depth of cure. The silicone compositions are photocurable, and may also be moisture or heat curable.
Claims20
A curable silicone composition comprising:
- (a) a photo-curable silicone resin having the following structure:
- wherein MA is a methacryloxyalkyl group, R1 and R2 may be the same or different and are monovalent hydrocarbyl groups having up to 10 carbon atoms, or halo- or cyano-substituted hydrocarbyl groups, and n is from 1 to 1,200;
- (b) an acylphosphine oxide photoinitiator;
- and
- (c) a fluorescent dye in amounts of about 0.002% to 0.006% by weight of the total composition.
A curable silicone composition comprising:
- (a) a curable silicone resin;
- (b) a cure system comprising a premix of an acylphosphine oxide photoinitiator dissolved in a liquid photoinitiator;
- and
- (c) a fluorescent dye in amounts of about 0.002% to 0.006% by weight of the total composition.
A curable silicone composition comprising:
- (a) a photo-curable silicone polymer;
- (b) a fluorescent dye in amounts of about 0.002% to 0.006% by weight of the total composition;
- (c) a premix comprising a first photoinitiator comprising a member selected from the group consisting of a bisacylphosphine oxide, acylphosphine oxide and combinations thereof;
- a second photoinitiator different from the first;
- and
- at least one non-polar solvent.
A dual photo/moisture curing silicone composition having enhanced cure-through-depth comprising:
- (a) a photo-moisture curable silicone component having the following structure:
- wherein MA is a methacryloxyalkyl group, R1 and R2 may be the same or different and are monovalent hydrocarbyl groups having up to 10 carbon atoms, or halo- or cyano-substituted hydrocarbyl groups, and n is from 1 to 1,200;
- (b) a premix of an acylphosphine oxide photoinitiator in a solvent carrier;
- and
- (c) a fluorescent dye in amounts of about 0.002% to 0.006% by weight of the total composition.
A method of preparing a photo-curable silicone composition comprising:
- (a) providing a photo-curable silicone resin having the following structure:
- wherein MA is a methacryloxyalkyl group, R1 and R2 may be the same or different and are monovalent hydrocarbyl groups having up to 10 carbon atoms, or halo- or cyano-substituted hydrocarbyl groups, and n is from 1 to 1,200;
- and
- (b) mixing the curable silicone polymer with an acylphosphine oxide photoinitiator and a fluorescent dye,
- wherein the fluorescent dye is present in amounts of about 0.002% to 0.006% by weight of the total composition.
A composition comprising the reaction product of:
- (a) a photo-curable silicone resin having the following structure:
- wherein MA is a methacryloxyalkyl group, R1 and R2 may be the same or different and are monovalent hydrocarbyl groups having up to 10 carbon atoms, or halo- or cyano-substituted hydrocarbyl groups, and n is from 1 to 1,200;
- (b) a premix of a solid acylphosphine oxide photoinitiator and a solvent for said solid photoinitiator;
- and
- (c) a fluorescent dye in amounts of about 0.002% to 0.006% by weight of the total composition.
Dependencies are inferred from the claim text.