A series of xanthene-type reactive dyes having dichlorotriazine or sulfoethylsulfonyl group was synthesized by chlorosulfonation and amination of Sulforhodamine B (C. I. Acid Red 52). Compared with Sulforhodamine B, absorption spectra for the solutions of the above reactive dyes showed bathochromic shifts, and bluish shades on silk fibre were observed. The exhautions and reaction ratios on silk were more than 88%and washing fastness was 4-5 grade. The structures of aminosulfo derivatives of Rhodamine were characterized by NMR and IR spectra and elemental analysis.
Novel fluorinated methacrylic polymers and copolymers were prepared. Perfluoroacid fluorides containing a dialkylamino group such as pyrrolidino and dipropylamino groups were reduced to the corresponding 1, 1-dihydroperfluoroalcohols, which were then reacted with methacryloyl chloride to give the methacrylates. The homopolymers and the copolymers with methyl methacrylate were obtained by a radical polymerization. The tough polymer films prepared by solution casting showed excellent water repellency with marked contact angle.
Anodic oxidation of aluminum and electrolytic coloring were performed in Cu (II) containing solution by hybrid bath process (HBP). The color and composition of obtained films were investigated in comparison with those obtained by the conventional process. The color of the films produced by both processes was reddish brown. L* value, which indicates the degree of lightness, was the following order for the three processes, conventional bath with low concentration of sulfuric acid<conventional bath with high concentration of sulfuric acid<HBP. XRD and EPMA results revealed that metallic copper was deposited on the bottom of the pores of the films. The films were decolorized with an increase of time regardless of the coloring process.The decoloration depended on the water content of surroundings around the films and the content of sulfate anion in the films. The reason for the decoloration seemed that metallic copper was converted to the compound like verdigris.