PURPOSE: To heighten the curing speed, curing depth and storage life of a binder by using a photocuring binder formed by photocuring a specific addition- polymerizable composition, as the abrasive binder.
CONSTITUTION: An addition-polymerizable composition contains a free-radically- polymerizable monomer and a photoinitiator system soluble in the monomer. The photoinitiator system contains a photochemically effective quantity of arylidonium salt, a sensitizing compound that can absorb light from any part of wavelength in a range of 300 to 1000 nm and can sensitize 2-methyl-4.6-bis(trichloromethyl)-S-triazine, and an electron donor. The electron donor is different from the sensitizing compound and is composed to be zero < Eox (donor) ≤p-dimethoxybenzene. Such a composition is photocured to obtain a photocuring binder, and abrasive is supported on a support body such as a lining sheet or nonwoven fabric by this photocuring binder to obtain coated abrasive material with adhesively bound fine abrasive grains.
EFU ANDORIYUU UBERU ZA SAADO
ERITSUKU JIYOOJI RAASON
