| 摘要 |
PURPOSE: Provided are seated flat panel display devices, to novel edge sealant compositions therefor and to novel polymers used in such compositions. Obtained sealant in the invention can produce a fixtured assembly at low temperature, which can withstand high temperature bake out, and which after bakeout, pumpout and closure of the pumpout port, can maintain a vacuum seal at pressures in the range of from about 10¬-3 Torr to about 10¬-9 Torr, depending own the specific application, without outgassing. CONSTITUTION: Cationically curable adhesives and sealants with increased viscosities and improved rheological control and good storage stability are prepared using a cationically curable monomer and a thickening polymer which is the alkylation reaction product of poly(4-hydroxystyrene) or poly(2-hydroxystyrene) with a compound RX where R is allyl, methallyl, crotyl or prenyl and X is Cl, Br or I. The cationically curable monomer suitably includes at least one alkenyloxystyrene monomer. Such thickened adhesives are useful as edge sealants for flat panel display devices. A-stage curing of the adhesive with UV irradiation allows for near ambient temperature fixturing of the device assemblies and B-stage thermal curing of the adhesive can be conducted at much lower temperatures than are needed for glass frit sealants. The B-stage cured products have thermal resistance, outgassing and substrate adhesion properties adequate for flat panel display devices.
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