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The most common form of cellulose acetate fiber has an acetate group on approximately two of every three hydroxyls. This cellulose diacetate is known as secondary acetate, or simply as "acetate". After it is formed, cellulose acetate is dissolved in acetone, forming a viscous solution for extrusion through spinnerets (which resemble a shower ...
Cellulose acetate film, or safety film, is used in photography as a base material for photographic emulsions. It was introduced in the early 20th century by film manufacturers and intended as a safe film base replacement for unstable and highly flammable nitrate film. Cellulose diacetate film was first employed commercially for photographic ...
The origins of the company lie with two brothers, Henri and Camille Dreyfus.In 1912, they set up "Cellonit Gesellschaft Dreyfus and Co" in Basel, Switzerland.In 1916, the brothers were invited to live in Britain by the British Government, to produce their recently developed cellulose acetate dope for the war effort; the canvas skins of aircraft of the time were sealed and made taut with ...
Cellulose acetate is also known as "safety" film and started to replace nitrate film in still photography in the 1920s. [1] There are several types of acetate that were produced after 1925, which include diacetate (c. 1923 – c. 1955), acetate propionate (1927 – c. 1949), acetate butyrate (1936–present), and triacetate (c. 1950 – present). [1]
British Celanese factory, Spondon, Derbyshire British Celanese acetate factory, Spondon, Derbyshire. Camille and Henri Dreyfus moved to Britain in 1916 during World War I (July 1914 - November 1918) to supervise construction of a factory to make cellulose acetate dope, used to make the wood-and-fabric airplanes of the day fire-resistant and waterproof. [6]
Cigarette filters are usually made from plastic cellulose acetate fibre, [3] but sometimes also from paper or activated charcoal (either as a cavity filter or embedded into the cellulose acetate). Cellulose acetate is made by esterifying bleached cotton or wood pulp with acetic acid. Of the three cellulose hydroxy groups available for ...
Typical doping agents include nitrocellulose, cellulose acetate and cellulose acetate butyrate. [6] Liquid dopes are often highly flammable; nitrocellulose, for instance, is also known as the explosive propellant "guncotton". Dopes often have colouring pigments added to facilitate even application, and are available in a wide range of colours. [7]
Arthur Eichengrün (13 August 1867 – 23 December 1949) was a German Jewish chemist, materials scientist, and inventor. He is known for developing the highly successful anti-gonorrhea drug Protargol, the standard treatment for 50 years until the adoption of antibiotics, and for his pioneering contributions in plastics: co-developing (with Theodore Becker) the first soluble cellulose acetate ...