Patent ID: 7830013

Claim:
A material for forming an adhesion reinforcing layer comprising any one of organoalkoxysilane-based compositions having a basic functional group and organoalkoxysilane with a basic additive, wherein the organoalkoxysilane is an oligomer which is produced by hydrolysis and condensation of an alkoxy group, and the concentration of the oligomer with respect to the material for forming an adhesion reinforcing layer is 0.1% by mass or less, and the basic additive is at least one selected from the group consisting of: sodium hydroxide, potassium hydroxide, lithium hydroxide, pyridine, pyrrole, piperazine, pyrrolidine, piperidine, picoline, monoethanolamine, diethanolamine, dimethylmonoethanolamine, monomethyldiethanolamine, triethanolamine, diazabicyclooctane, diazabicyclononane, diazabicycloundecene, tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, ammonia, methylamine, ethylamine, propylamine, butylamine, pentylamine, hexylamine, pentylamine, octylamine, nonylamine, decylamine, N,N-dimethylamine, N,N-diethylamine, N,N-dipropylamine, N,N-dibutylamine, trimethylamine, triethylamine, tripropylamine, tributylamine, cyclohexylamine, trimethylimidine, 1-amino-3-methylbutane, dimethylglycine and 3-amino-3-methylamine.