Publication

Light-sensitive photographic silver halide material containing an antistatic agent

Jutta Christine Wandrey
1983
Patents

Abstract

Photog. materials having improved antistatic characteristics contain in an antihalation layer, interlayer, or top layer a homo- or copolymer having repeating units with a quaternary ammonium structure of the formula I (R-R3 = H or C1-6 alkyl; R4,R5 = C1-18 alkyl; X- = halide, NO3-, OH-, HSO4-, SO42-, n = 100-600) as the antistatic agent. The antistatic agent, which has no adverse effects on the phys.-mech. properties of the photog., can contain a vinyl compd., such as acrylic acid, arylamide, arylonitrile, diacetoneacrylamide, or vinylpyrrolidone, as the comonomer. Thus, a color photog. material carrying an antihalation back layer contg. the polymer II, the polymeric acid HO2C(CH2CMePh)CO2H, and a triphenylmethane dye showed a surface resistance of 5.2 * 106 W and excellent antistatic characteristics. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/9be8a211-a0a1-42d8-9c1e-16ca288fad12

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Jutta Christine Wandrey
1983
Patents

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/9be8a211-a0a1-42d8-9c1e-16ca288fad12

About this result

Related concepts (32)

Photographic film

Photographic film is a strip or sheet of transparent film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide crystals. The sizes and other characteristics of the crystals determine the sensitivity, contrast, and of the film. The emulsion will gradually darken if left exposed to light, but the process is too slow and incomplete to be of any practical use. Instead, a very short exposure to the image formed by a camera lens is used to produce only a very slight chemical change, proportional to the amount of light absorbed by each crystal.

Acrylic acid

Acrylic acid (IUPAC: propenoic acid) is an organic compound with the formula CH2=CHCOOH. It is the simplest unsaturated carboxylic acid, consisting of a vinyl group connected directly to a carboxylic acid terminus. This colorless liquid has a characteristic acrid or tart smell. It is miscible with water, alcohols, ethers, and chloroform. More than a million tons are produced annually. The word "acrylic" was coined in 1843, for a chemical derivative of acrolein, an acrid-smelling oil derived from glycerol.

Quaternary ammonium cation

In chemistry, quaternary ammonium cations, also known as quats, are positively-charged polyatomic ions of the structure , where R is an alkyl group, an aryl group or organyl group. Unlike the ammonium ion () and the primary, secondary, or tertiary ammonium cations, the quaternary ammonium cations are permanently charged, independent of the pH of their solution. Quaternary ammonium salts or quaternary ammonium compounds (called quaternary amines in oilfield parlance) are salts of quaternary ammonium cations.