Optical adhesive coating having low refractive index

Details Optical adhesive coating having low refractive index Optical adhesive coating having low refractive index

B - Operations, Transporting

32

B

B32B 27/00 (2006.01) B32B 27/22 (2006.01) C08F 20/22 (2006.01) C08F 220/22 (2006.01) C09J 7/00 (2006.01) C09J 7/02 (2006.01) C09J 133/16 (2006.01)

Patent

CA 2450775

This invention is directed to optical adhesives useful in light transmitting devices, and more particularly to fluorosubstituted monoacrylate based adhesives having low refractive index. The optical adhesive of the present invention is soluble in organic solvents, and in particular, in non- fluorinated organic solvents. The polymer of the optical adhesive of the present invention has a low glass transition temperature and has the ability to bond well with substrates, including glass substrates and polyethylene terephthalate polyester film substrates typically used in optical devices. The invention is further directed to transfer tapes comprised of at least one layer of a fluorosubstituted monoacrylate based adhesive.

L'invention se rapporte à des adhésifs optiques utiles dans les dispositifs émetteurs de lumière, plus particulièrement à des adhésifs à base de monoacrylate fluorosubstitué présentant un faible indice de réfraction. Cet adhésif optique est soluble dans des solvants organiques et, plus précisément, dans des solvants organiques non fluorés. Le polymère de cet adhésif optique selon l'invention présente une faible température de transition vitreuse et une bonne capacité de liaison avec des substrats, y compris des substrats en verre et des substrats de film polyester polyéthylène téréphtalate typiquement utilisés dans les dispositifs optiques. Par ailleurs, cette invention concerne aussi des rubans adhésifs double face comprenant au moins une couche d'un adhésif à base de monoacrylate flurorosubstitué.

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