dibasic acid

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  • noun

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an acid containing two replaceable hydrogen atoms per molecule

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The most common method for the preparation of "modified alkyd resin" is also the monoglyceride method [80], In related studies, at the first stage, oil has been converted to monoglyceride by alcoholysis, and then esterification process has been carried at the second stage by adding dibasic acid [4, 27, 28, 30].
The peptides and amides used (glycinamide, glycylglycine, asparagine, and glutamine) and the dibasic acids used (cyclobutane 1,1-dicarboxylic acid, oxalic acid, malonic acid, succinic acid, and adipic acid) were all provided by BDH-Biochemicals Ltd., Poole, England.
Raju, KVSN, "Influence of Dibasic Acids on the Properties of Modified Polyurethane Coatings." Surf.
A equals at least one alkali metal alkyl sulfonate, B is at least one compound selected from polyol esters and fatty acid alkanol amides and C is at least one compound selected from dibasic acid esters and polyethylene glycol esters.
glycerol - and a dibasic acid. This type of polyester is modified with a fatty acid, which is obtained by the saponification of natural fats and oils, e.g., stearic acid or oleic acid.
* Succinic anhydride (SAA) for applications where a dibasic acid anhydride is desired.
Generally, polyester polyols can achieve highsolid coatings with great solvent resistance and good adhesion to metals.(9.10) Polyester resins for coating applications are usually prepared with both aromatic and aliphatic dibasic acids. Isophthalic acid is the principal aromatic dibasic acid used in coatings, and adipic acid is the principal aliphatic diacid.(11) The aromatic diacid compound is used to increase the glasstransition ([T.sub.g]) temperature, hardness, and chemical resistance.
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.
A series of polyesters was prepared to evaluate hydrolytic stability as a function of cyclohexyl dibasic acid content.