The syntheses and properties of trimethylsilyl or benzoyl derivatives of 3-hydroxyphenylphthalides were investigated. The trimethylsilyl derivatives were prepared by the reaction of 3-hydroxyphenylphthalides with hexamethyldisilazane in THF, while the benzoyl derivatives were prepared by the reaction of 3-hydroxyphenylphthalides with benzoyl chloride in pyridine. The UV-VIS spectra of these derivatives in a 95% acetic acid solution or aqueous methanol solution of sodium hydroxide were investigated. The eachλ1maxof trimethylsilyl derivatives was the same as that of their corresponding 3-hydroxyphenylphthalides, while the eachλ1maxof the benzoyl derivatives shifted to a longer wavelength than that of the 3-hydroxyphenylphthalides.
Acid and base amounts of pigments were estimated by a back titration method using bases and acids of various strength. The dispersibility in an acidic, a neutral and a basic acrylic resins was correlated to the acid and base amounts of the pigments. The acid amounts of all four titanium dioxide pigments (TiO2-A, -B, -C, and -D) were almost proportional to the base strength of the added base. For two pigments (TiO2-C and -D), the base amounts, measured using weak acid, were small. On the other hand, the base amounts of the other pigments (TiO2-A and -B) were almost constant, even though the acids of different strength were used. For titanium dioxide pigment, iron oxide, and copper phthalocyanine blue pigments, the gloss of their dispersed pastes in the neutral, the acidic and the basic resins, which is an indicator of dispersibility, was measured. The difference between the gloss value for the acidic and the neutral resins showed good correlation with the base amount of the pigments measured using acid having almost the same strength as the acid of resin. The same result was obtained for the basic and neutral resins, for the acid amount of the pigments.
Fluoropolymer-melamine film showed good acid resistance as for the spot test at the wide temperature range of 40 to 80°C, compared with acrylic polymer-melamine film. Acid spotted areas of acrylic polymer and fluoropolymer films were analyzed by SEM, FT-IR, CP-MAS, and XPS. It was found that the triazine ring of acrylic polymer-melamine film was hydrolyzed to cyanuric acid, that was removed from the film surface, but the triazine ring of fluoropolymer was hard to be hydrolyzed and consequently remained at the film. XPS revealed that there was greater amount of melamine on the surface of acrylic polymer film than fluoropolymer film. The penetration ratios of water and acid for acrylic polymer film was found to be much higher than for fluoropolymer film. The good acid resistance of fluoropolymer-melamine film was resulted from its little acid penetration which prevented the hydrolysis of melamine.
The odor removing fibers having biomimetic functions have been developed by giving the enzyme-Like catalytic functions of iron (III) or cobalt (II) -phthalocyanine (Fe (III) -, Co (11) -pc) derivatives and their polymers. The kinetics of odor-removing mechanism of Mt-oapc supported on porous and amorphous enriched rayon stable fiber have been investigated. It was found that the foul odor substances such as thiols, amines, etc. can be removed by the enzyme-like reaction of Mt-oapc supported on the rayon fibers. Furthermore, the odor-removing abilities of these fibers from the room for bedridden patients, the waste water treatment place and the lavatory were evaluated. These results showed a trace amount of sulfur compounds which are main component in odor are effectively removed below 0.1 ppb using the fiber containing Mt-oapc. The fiber can eliminate the foul oder substances by 20 to 100 times more effective than activated carbon, and can with stand 50 times of washing. Utilizing these characteristics, new types of odor-removers such as mattress, quilt, blanket, wad, woven, and nonwoven materials produced from odor-removing fibers have been developed.