HIGH REFRACTIVE INDEX PRESSURE-SENSITIVE ADHESIVES
申请人:OLSON B. DAVID
公开号:US20070264517A1
公开(公告)日:2007-11-15
The present invention provides pressure-sensitive adhesives having a refractive index of at least 1.48. The pressure-sensitive adhesives comprise at least one monomer containing a substituted or an unsubstituted aromatic moiety.
Provided is a thermally conductive sheet with greater optical transmission. The thermally conductive sheet provided by this invention has a resin layer that comprises a resin and a thermally conductive filler. The resin has a refractive index np and the thermally conductive filler has a refractive index nf, satisfying the next relational expression -0.04≤(np - nf)≤0.04. According to a preferable embodiment, the thermally conductive filler content is 50 parts by weight or more and 250 parts by weight or less to 100 parts by weight of the resin.
PRESSURE-SENSITIVE ADHESIVE LAYER AND PRESSURE-SENSITIVE ADHESIVE SHEET
申请人:Nitto Denko Corporation
公开号:EP3696221A1
公开(公告)日:2020-08-19
Provided are a PSA layer having a high refractive index and high adhesive strength and a PSA sheet having the PSA layer. The PSA layer comprises a PSA obtained using a PSA composition comprising a base polymer. Here, the PSA layer has a refractive index of 1.54 or higher and the base polymer has a glass transition temperature of 5 °C or lower.
Optically clear hot melt processable high refractive index adhesives
申请人:3M INNOVATIVE PROPERTIES COMPANY
公开号:US10202477B2
公开(公告)日:2019-02-12
Adhesive compositions that are optically transparent include a (meth)acrylate-based copolymer having a refractive index of at least 1.48, and particles of a thermoplastic polymer. At least some of the particles have an average particle size that is larger than the wavelength of visible light. The adhesive compositions are prepared by hot melt processing packaged adhesive compositions.
Optically clear adhesive compositions contain an elastomeric polymer and a low molecular weight polymeric additive. The elastomeric polymer and the low molecular weight polymeric additive form an acid-base interaction. The refractive index of the adhesive composition is higher than the refractive index of the elastomeric polymer. The adhesive composition may also contain additional domains of liquids, polymers, additives or particles that have a higher refractive index than the elastomeric polymer.