isophthalic acid


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isophthalic acid

[¦ī·sō¦thal·ik ′as·əd]
(organic chemistry)
C6H4(COOH)2 Colorless crystals subliming at 345°C; slightly soluble in water, soluble in alcohol and acetic acid, and insoluble in benzene; used as an intermediate for polyester and polyurethane resins, and as a plasticizer. Also known as meta-phthalic acid.
References in periodicals archive ?
Isophthalic acid is the principal aromatic dibasic acid used in coatings, and adipic acid is the principal aliphatic diacid.
Of particular interest was the case in which R was a mixture of bisphenol A polycarbonate and the bis-hydroquinone ester of isophthalic acid. A composition based on this mixture was investigated for use as an in-mold coating to provide a class "A" finish to glass mat reinforced thermoplastic composites produced by a high speed stamping process.
The polyester was composed of terephthalic acid, isophthalic acid, ethylene glycol, and neopentyl glycol and has a molecular weight of 15,000-20,000 and was obtained from DuPont Teijin Films, Melinex 991 and is commonly used as the receiver layer in the D2T2 process.
Table 3: Formulation for a water-dispersible silicone-alkyd resin prepared using alkoxy silanes Ingredients Weight (g) 1, 4-cyclohexanedimethanol 140 Trimethylolpropane 53 Dehydrated castor oil fatty acid 218.7 70/30 mole % mixture of 345.6 [C.sub.6][H.sub.5]Si[(OC[H.sub.3]).sub.3] and [CH.sub.3][CH.sub.2][CH.sub.2]Si[(OC[H.sub.3]).sub.3] Water 41.92 Isophthalic acid 66.7 Trimellitic anhydride (fro water-reducible resin) 66.7
Polyester polyols containing isophthalic acid (PIA) weather extremely well, but they have poor flexibility.
Eastman Chemical's purified terephthalic acid and isophthalic acid plants previously announced for North America will be built in Kingsport, at Tennessee Eastman Division.
An isopolyester resin, based on Amoco's isophthalic acid, is used to manufacture the grating system.
The drawing and tensile properties of PA 6 fibers were found to improve efficiently after addition of crystallization inhibitors (e.g., carbolic acid [2], naphthalen dicarboxylic acid, isophthalic acid, diphenyl-4,4'-dicarboxylic acid, and 4,4'-diphenyl ether dicarboxylic acid [3]).
Abstract A series of polyester polyol resin was synthesized by using 1,4-cyclohexanedimenthanol (1,4-CHDM) and three different diacids: 1,3-cyclohexanedicarboxylic acid (1,3-CHDA), isophthalic acid (IPA) and adipic acid (AA).