Diphenyl isophthalate

Diphenyl Terephthalate—Diphenyl Isophthalate-Bisphenol-A Melt Polyesterification... 

Experiment with addition of diphenyl carbonate Diphenyl terephthalate, 31.8 g (0.1 mol), 28.62 g (0.09 mol) of diphenyl isophthalate, and 2.37 g (0.011 mol) of diphenyl carbonate are polycondensed with 45.6 g (0.2 mol) of 2,2-bis(4-hydroxyphenyl)propane (bisphenol-A) under the preceding conditions. A slighdy brownish, extremely tough, noncrystalline polyester is obtained with an inherent viscosity equal to 0.56 dL/g. The softening point of the polyester is equal to 200°C and the melting range is 215-285°C. 

Example 12. PA-6,1 from diphenyl isophthalate.65 To a well-dried 50-mL straight-wall three-necked flask with nitrogen inlet/outlet, condenser unit, and magnetic stirrer in a heating block (Fig. 3.18b), 15.1 g of diphenyl isophthalate and 6.15 g of 1,6-hexamethylene diamine are added. The mixture is heated to 190° C over a 1-h period and to 253° C over a further 40 min, a vacuum is then... 

Diphenyl sulfone (DPS), 338 Diphenyl terephthalate-diphenyl isophthalate-bisphenol-A melt poly esterification, 111-112 Direct polyesterification, 63-69 Distinctness of image (DOI), 245 Divergent method, 8... 

On heating the silylated bisamine 2185 with diphenyl isophthalate 2186 the polyamide 2187 and phenoxytrimethylsilane 13d are formed [2, 8]. On reacting 2185 with 4-chloroformylphthalic anhydride 2188 at 50 °C MesSiCl 14 is ehminated to give 2189, which cyclizes with ehmination of trimethylsilanol 4 or hexamethyldi-siloxane (HMDSO) 7 at 200°C to give the polyamide 2190 [1, 2, 9] (Scheme 14.1). 

Diphenylhexyllithium, 14 258 Diphenyl isophthalate (DPIP), 13 380 Diphenylmethane, soluble dyes, 7 373t. 

VI) poly (2,4(8-vinylpyridyl)diphenyl isophthalate) [poly(2,4-VPDPI)]... 

Polyimides are obtained from amine and carboxyl reactants when the ratio of amine to acid functional groups is 1 2. If reactants with the reverse ratio of amine to acid functional groups are employed, polybenzimidazoles (PBI) are produced for instance, polymerization of 3,3 diaminobenzidine and diphenyl isophthalate yields poly[(5,5 -bi-liT-benzimidazole]-2,2 -diyl)-l,3-phenylene] (Lilia) (Eq. 2-216) [Buckley et al., 1988 Hergenrother, 1987 ... 

It should be noted that structure Lilia is an oversimplification for the polymer formed from 3,3-diaminobenzidene and diphenyl isophthalate. Dehydration after ring closure can occur toward either of the two nitrogens, and one would expect more or less random placements of the carbon-nitrogen double bonds. Thus, the PBI structure is a random copolymer of repeating units Lilia, LUIb, and LIIIc. 

Polybenzimidazols developed for heat-resistant resins were also applied to reverse osmosis membranes, first by Cellanese Corporation 67 68). The asymmetric poly-2,2 -(m-phenylene)-5,5 -dibenzimidazole membrane 18 was prepared from 3,3 -diamino-benzidine (79) and diphenyl isophthalate (20) and had a high water flux permeability,... 

C20H14O4 diphenyl isophthalate 744-45-6 25.00 1.2736 2 32135 C20H2004 3-(4-carboxyphenyl)-2,3-dihydro-1,1,3-trimet 3569-111 gioi T2361 31... 

In 1983 Celanese began the production of polybenzimidazole (PBI) by using diphenyl isophthalate and 3,3 -diaminobenzidine, DAB. PBI is a high-temperature and flame-resistant fiber, used in the production of safety gloves and various items of protective clothing as well as for the production of PBI-based membranes for reverse osmosis and ultrafiltration applications. 

Around 1960 Carl Marvel at Illinois discovered that the reaction between 3,3, 4,4 -tetraaminobiphenyl (diaminobenzidine) (186) and diphenyl isophthalate yielded the strong, stable poly benzimidazoles. The thermal and chemical stability of their fibers make them suitable for parachutes, space suits and firefighting clothing. Several novel polymerizations were reported, including with 1,2,5,6-tetraaminoanthraquinones. 

Use Copolymerized with diphenyl isophthalate to make high-temperature-resistant polybenzimidazoles. 

Diphenyl isophthalate 2,2 -Dimethyldiphenyl-methane-3,3, 4,4 -tetra-amine... 

Diphenyl isophthalate 3, 3w-Diamino-2,2-diphenyl-propan e-4, 4 -diol... 

SYNTHESIS Condensation polymerization of 3,3, 4,4 -tetraaminobiphenyl (TAB) and diphenyl isophthalate (DPIP) in poly(phosphoric) acid, or in a hot molten nonsolvent such as sulfolane or diphenyl sulfone. ... 

Polybenzimidazoles Mainly polymers of 3,3, 4,4 -tetraminonbiphenyl (diaminobenzidine) and diphenyl isophthalate. Has good heat, fire, and chemical resistance. Used as coatings and fibers in aerospace and other high-temperature applications. Also called PBI. 

Trade Name Synonyms Doverphos 9 [Dover http //www.doverchem.com], Doverphos DPIOP t[Oover http //www.doverchem.com], Weston ODPP [GE Spec. http //www.ge. com/speciaitychemicais] Diphenyl isophthalate CAS 744-45-6 EINECS/ELINCS 212-014-6 Synonyms DPIP Isophthalic acid diphenyl ester Ciassification Aromatic ester Empiricai C20H14O4 Formuia C6H5OOCC6H4COOC6H5 Properties Wh. solid sol. in acetone insol. in water m.w. 318.33 m.p. 138-139 C Toxicoiogy TSCA listed Precaution Combustible Uses Mfg. of polybenzimidazoles, high temp, resist, polymers... 

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