Patent ID: 7923503

Claim:
An aqueous pressure-sensitive adhesive composition in which an acrylic polymer serves as a main component and the acrylic polymer is dispersed in water, the aqueous pressure-sensitive adhesive composition containing: A) acrylic polymer obtained by polymerizing a monomer raw material including alkyl (meth)acrylate as a main monomer, a first functional monomer having a first functional group to react with a hydrazino group, and a second functional monomer having a second functional group to react with a carbodiimide group; B) a hydrazine-based crosslinking agent; and C) a carbodiimide-based crosslinking agent; wherein the hydrazine-based crosslinking agent and the carbodiimide-based crosslinking agent are contained in a proportion such that the number of moles of the crosslinkable functional group contained in the carbodiimide-based crosslinking agent is 0.2 to 5 times the number of moles of the crosslinkable functional group contained in the hydrazine-based crosslinking agent.