PURPOSE: To provide a bonding agent which protects the human body from being injured by the scattering of pieces of glass, consisting of a modified copolymer obtd. by grafting acrylic acid onto the partially hydrolyzate of an ethylene/vinyl acetate copolymer.

CONSTITUTION: Optionally, a silane coupling agent such as γ-aminopropyltriethoxysilane, an antioxidant, an ultraviolet light absorber, etc. are blended with a modified copolymer contg. acetoxy, hydroxyl and carboxyl groups and having an MI of 10W20g/min, a density of 0.95W0.96, a vicat softening point of 50W95, a strength of 220W270kg/cm2 and an elongation of 500W650%, obtd. by grafting acrylic acid onto the partially hydrolyzate of an ethylene/vinyl acetate copolymer.