Acid Anhydride


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Acid Anhydride

An organic compound with two acyl groups sharing the same oxygen.
Example Oxide of an organic compound, which reacts with water to form an acid.
References in periodicals archive ?
Esterification solution was prepared by addition of acid anhydride to a mixture of 50 mL C[H.
1996), and among the different reagent used; acid chloride and acid anhydride are the most applied (Samaranayake and Glasser 1993) in both heterogeneous and homogeneous media.
It's the body's way of breaking down the alcohol and, for most of us, acid anhydride disappears from our bloodstream almost immediately.
5% (b) Vinyltriethoxysilane [greater than or equal to]98% Styrene [greater than or equal to]99% Maleic acid anhydride [greater than or equal to]99.
The patent describes the use of sorbitol (easily derived from starch) as the polyhydric alcohol and the use of succinic acid anhydride as the polycarboxylic acid.
Chlorendic anhydride is an acid anhydride with a chlorine content of 54.
Succinic anhydride (SAA) for applications where a dibasic acid anhydride is desired.
DDSA (dodecenyl succinic anhydride) is offered for producing tougher, more flexible cured polymers; Succinic anhydride (SAA) is recommended for applications where a dibasic acid anhydride is desired; and HHPA (hexahydrophthalic anhydride) hardener is also recommended for curing epoxies.
The infrared technique employed also allowed for the quantitative analysis of the compound types absorbing in the carbonyl region of the IR spectra including carboxylic acids, dicarboxylic acid anhydrides, 2-quinolone type.
Chemical properties related to the carboxyl group: Introduction; Hydrolysis; Esterification; Acid chlorides, acid anhydrides and ketene dimers; Peroxy acids and esters; Long-chain alcohols; Acetals/ketlas and orthoesters; Nitrogen-containing compounds; Sulfonation and other reactions at the a-position; Barton reaction.
has been granted a patent for a powder coating composition comprised of a first component comprised of a melt-blended mixture of at least one glycidyl group-containing acrylic resin having an epoxide equivalent weight of from approximately 250 to 1,500 and glass transition temperature of 30[degrees]C to 80[degrees]C and a curing agent selected from the group consisting of dicarboxylic acids, dicarboxylic acid anhydrides, and mixtures thereof; and a second component dry-blended with the first component, comprising at least one carboxyl-group containing material that has acid number of 10-300 and that is not substantially compatible with the first component.
The powder coating composition comprises a polyester resin comprising an acid structural block selected from the group consisting of aromatic dicarboxylic acids, aromatic dicarboxylic acid anhydrides, and aromatic dicarboxylic acid esters, and a polyfunctional low molecular weight epoxide crosslinking agent.