Abstract: The present invention relates to a photopolymerizable composition comprising a polymerizable, polyethylenically unsaturated compound, benzil and/or fluorenone, a specific biphenyl ketone such as para-phenyl benzophenone, and a reducing agent such as a tertiary amine. The present composition permits rapid and complete curing. Moreover, in the photopolymerization of compounds sensitive to air inhibition non-tacky surfaces are obtained. The effect observed is based on a synergism between the present photoinitiators. The advantages of the invention are most manifest in curing relatively thick layers of materials.

Abstract: Cationic dyeable copolyester polymer and yarns made therefrom having as an integral part of the polymer chain, sulfonamide groups each containing a dye sensitizing unit, derived from alkaline earth or alkali metal salts of sulfonated sulfonamides such as the sodium salt of N-(.beta.-hydroxyethyl)-N-(3-carbomethoxybenzenesulfonyl) taurine.