PROCESS FOR THE ASSEMBLY OF GLASS DEVICES SUBJECTED TO HIGH TEMPERATURES, COMPOSITIONS THEREFOR AND NOVEL POLYMERS FOR RHEOLOGICAL CONTROL OF SUCH COMPOSITIONS

摘要

Cationically cureable adhesives and sealants with increased viscosities and improved rheological control and good storage stability are prepared using a cationically cureable 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 cureable 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.