Fast curing optical adhesive
Assignee3M Innovative Properties Company
InventorsWendy L. Thompson, Wayne S. Mahoney, Donald K. Larson, Daniel J. Treadwell
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Abstract
An adhesive composition for joining optical components is described. The adhesive composition comprises at least one epoxy resin, a visible light photoinitiating system comprising at least one of a cationic photoinitiator and a sensitizer, a polyol and at least 50 wt. % of a nanoparticle filler. The visible light photoinitiating system includes at least one of a cationic photoinitiator and a sensitizer and the nanoparticle filler comprises a first nanoparticle having a first nominal size and a second nanoparticle having a second size. The adhesive composition has a refractive index between 1.44 and 1.47 and a dn/dT of less than −2E−4 when cured.
Claims23
An adhesive composition for joining optical components, comprising:
- at least one epoxy resin;
- a visible light photoinitiating system comprising at least one of a cationic photoinitiator and a sensitizer;
- a polyol;
- and
- at least 50 wt. % of a nanoparticle filler comprising a first nanoparticle having a first nominal size and a second nanoparticle having a second size, wherein the first nanoparticle is larger than the second nanoparticle,
- wherein the adhesive has a refractive index between 1.44 and 1.485 at 1550 nm and a dn/dT of less than −2E−4 when cured, and wherein the adhesive has an optical transmission of greater than 98%.
Dependencies are inferred from the claim text.