Cellulose crotonate

Esters of unsaturated acids are of experimental interest because of their ability to be converted into insoluble products. Cellulose crotonate, upon heating in the presence of air, or upon exposure to ultraviolet light, becomes completely insoluble. This action may be accelerated by the addition of small quantities of benzoyl peroxide. Esters of more active unsaturated acids, such as cellulose acetate linoleate, become insoluble upon exposure to air at ordinary temperatures. ... 

Cellulose esters of unsaturated acids, such as the acetate methacrylate, acetate maleate (34), and propionate crotonate (35), have been prepared. They are made by treating the hydrolyzed acetate or propionate with the corresponding acyl chloride in a pyridine solvent. Cellulose esters of unsaturated acids are cross-linkable by heat or uv light solvent-resistant films and coatings can be prepared from such esters. 

Amine-containing cellulose esters, eg, the acetate A/A/-diethylaminoacetate (36) and propionate morpholinobutyrate (35), are of interest because of their unique solubiHty in dilute acid. Such esters are prepared by the addition of the appropriate amine to the cellulose acrylate crotonate esters or by replacement of the chlorine on cellulose acrylate chloroacetate esters with amines. This type of ester has been suggested for use in controlled release, mmen-protected feed supplements for mminants (36,37). 

Faraone, Parasacco, and Cogrossi (87) have introduced maleic and crotonic ester groups and methacryloyl ethylamine ether groups into partially acetylated celluloses. These cellulose derivatives containing substituents with polymerizable double bonds grafted with styrene when brought in contact in presence of benzoyl peroxide. 

Cozymase, I, 213 IV, 103 Cress seed mucilage, IV, 270 Crotonaldehyde, phytochemical reduction of, IV 91 Crotonbetaine, IV, 107 Crotonic acid, cellulose ester, I, 319 Crotonic acid, polymer, produced by certain bacilli, IV, 117 Crotonic acid, reduction by microorganisms, IV, 108 Crotyl alcohol, IV, 91 phytochemical reduction of, IV, 92,106 Crystalbumin. See Albumin. 

Chromatography, ion-exchange, 250, 251 Clostridium perfringens, 262 Colominic acid, 242, 261 Colostrum, 240, 245, 251, 258 Complex compounds, of celluloses, 296 of formazans with metals, 108 Condensation, aldol, 77 Crotonic acid, 177, 180... 

Crotonic acid esters of cellulose undergo addition reaction with cycloaliphatic amines, like morpholine or piperidine and with aliphatic primary amines. Unsaturated polymers can also undergo Diels-Alder reactions. One example is a reaction of hexachlorocyclopentadiene with polycyclopentadiene ... 

Cellulose acetate phthalate film-former, enteric pharmaceuticals Hydroxypropyl methylcellulose phthalate film-former, explosives Dibutyl phthalate film-former, fixing lotions PVP/VA/vinyl propionate copolymer VA/crotonates/vinyl propionate copolymer film-former, flexible hoses Ethylene/methyl acrylate copolymer film-former, floor finishes Ethylene/acrylic acid/vinyl acetate copolymer film-former, flooring compounds Acrylamides copolymer film-former, food... 

CH=CHCOOH. A white crystalline solid prepared by the oxidation of crotonaldehyde. It forms copolymers with vinyl acetate, used as hot-melt adhesives. Esters of crotonic acid are used as plasticizers for acrylic and cellulosic plastics (See image), o... 

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