| abstract |
[PROBLEMS] An adhesive for temporarily bonding glass substrates during drilling of glass substrates for hard disks, and having sufficient adhesive strength that does not peel off even when impacted during drilling, and without adhesive residue after drilling. Provided is an adhesive for temporary bonding that is compatible with releasability that can be easily peeled in heated water. An adhesive for temporarily adhering glass substrates at the time of drilling a glass substrate for a hard disk, comprising at least a (meth) acrylate compound, a photopolymerization initiator, and a gas generating agent. 60% by weight or more of the (meth) acrylate compound has an aromatic and / or alicyclic structure in the skeleton, and 5 parts by weight of the gas generating agent with respect to 100 parts by weight of the (meth) acrylate compound. The adhesive for temporary adhesion containing above. [Selection figure] None |