Ultraviolet-curable pressure sensitive adhesive composition and ultraviolet-curable pressure sensitive adhesive sheet
AssigneeLintec Corporation
InventorsMichio Kanai, Hideki Numazawa
Life of this patent
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Abstract
Disclosed is an ultraviolet-curable pressure sensitive adhesive composition comprising an ultraviolet-curable pressure sensitive adhesive component and a phosphorus type photopolymerization initiator. Also disclosed is an ultraviolet-curable pressure sensitive adhesive sheet obtained by coating a substrate with the ultraviolet-curable pressure sensitive adhesive composition. The ultraviolet-curable pressure sensitive adhesive composition is capable of retaining ultraviolet curing properties even if the ultraviolet-curable pressure sensitive adhesive sheet is brought into contact with wash water for a long period of time.
Claims4
An ultraviolet-curable pressure sensitive adhesive composition, having an adhesive strength which is lowered after irradation with ultraviolet light, comprising an ultraviolet-curable pressure sensitive adhesive component and a phosphorus containing photopolymerization initiator selected from acylphosphine oxide compounds represented by the formula:
- wherein R1 is an aromatic group which may have a substituent, and R2 and R3 are each independently any one of a phenyl group, an alkoxy group, and an aromatic acyl group, each of which may have a substituent.
Dependencies are inferred from the claim text.