Isophthaloyl chloride

A series of cross-linkable copoly(amide—imides) is known to be possible from aromatic diamines and substituted isophthaloyl chlorides containing unsaturated imide rings as a pendent function (13). 

MPD-1 fibers may be obtained by the polymeriza tion of isophthaloyl chloride and y -phenylenediamine in dimethyl acetamide with 5% lithium chloride. The reactants must be very carefully dried since the presence of water would upset the stoichiometry and lead to low molecular weight products. Temperatures in the range of 0 to —40° C are desirable to avoid such side reactions as transamidation by the amide solvent and acylation of y -phenylenediamine by the amide solvent. Both reactions would lead to an imbalance in the stoichiometry and result in forming low molecular weight polymer. Fibers are dry spun direcdy from solution. 

Table 28. Properties of Isophthalic Esters and Isophthaloyl Chloride...

The procedure described is a modification of the general procedure of Angyal2 for the preparation of aldehydes from benzylamines by the Sommelet reaction. Isophthalaldehyde has been prepared from w-xylene by preparation of the tetrachloro derivative and hydrolysis,3 from isophthaloyl chloride by the Rosenmund reaction,4 from a,a -dibromo-m-xylene by the Sommelet reaction,5 and from isophthaloyl chloride by reduction with lithium tri-Cbutoxyaluminumhydride.6... 

Terephthaloyl Chloride/Isophthaloyl Chloride/Bisphenol-A Solution Polyesterification... 

DSC 7g = 194°C, Tm = 260°C. A series of polyarylates can be prepared following die same procedure at various terephthaloyl chloride-isophthaloyl chloride ratios.434... 

This polymer can be synthesized from m-phenylenediamine and isophthaloyl chloride. It can be prepared by interfacial polymerization or solution polymerization.4,7 9 14... 

Example 17. Poly(m-phenylene isophthalamide) in solution.14 To a well-dried 250-mL four-necked straight-wall flange flask with nitrogen inlet/outlet, dropping funnel, and magnetic stirrer (Fig. 3.18a). 2.163 g of 1,3-phenylenediamine, 5.62 g of triethylamine, 5.506 g of triethylamine hydrochloride, and 36 mL of dry chloroform are added. Isophthaloyl chloride (4.06 g) in 14 mL of chloroform is then added through the dropping funnel over a 15-min period at 30° C with slow... 

The AICI3-catalyzed polycondensation of diphenyl ether with a mixture of terephthaloyl chloride and isophthaloyl chloride is a relatively inexpensive route to poly(ether ketone)s. The polymerizations were carried out in chlorinated solvents... 

Isophthalic acid, 60 Isophthalic-acid-modified PET, 530 Isophthaloyl chloride, 333... 

CgH 02 626-19-7) see Montelukast sodium isophthaloyl chloride (C8H4CI2O2, 99-63-8) see Ditophal isophytol... 

Violent reaction occurred between isophthaloyl chloride and methanol when they were accidentally added in succession to the same waste solvent bottle. 

Isophthaloyl chloride was recrystallized from n-hexane, which was distilled over sodium wire. 

The diamine was dissolved in N,N-dimethyl-acetamide by stirring under a nitrogen stream. After the diamine was completely dissolved, equal moles of isophthaloyl chloride was added all at once. Stirring was continued for about three hours after which the reaction mixture was poured into hot water and magnetically stirred. The polymer was washed with hot water at least three times and then extracted with acetone to remove low molecular weight species. The polymer was dried in vacuum oven at about 70°C overnight. 

Isophthalic (m-phthalic) acid (IPA) 10 216, 20 96, 102-103 Isophthalic resin(s), 20 114 formulation of, 20 102-103 mechanical properties of, 20 111-112 strength characteristics of, 20 112t Isophthalonitrile, 17 245 Isophthaloyl chloride, polymers derived from, 23 730... 

Isophthaloyl chlorides, 19 715 Isophytol, 24 502, 550 Isopolytungstate compounds structures of, 25 383-384 Iso prefix, 13 594-595 Isoprene, 24 501 Alfrey-Price parameters, 7 617t block copolymer synthesis, 7 647t butyl rubber polymers, 4 433 commercial block copolymers, 7 648t glass transition and melting... 

Isophthaloyl chloride, 2888 f Isopropyl chloroformate, 1560 Methanesullinyl chloride, 0435 Methoxyacetyl chloride, 1165 4-Methoxybenzoyl chloride, 2930 f Methyl chloroformate, 0599 Oleoyl chloride, 3772 Oxalyl dibromide, 0583 Oxalyl dichloride, 0605... 

AMINOHEPTANE ISOPHTHALOYL CHLORIDE PHTHALIC ANHYDRIDE ETHYNYLBENZENE ISOPHTHALIC ACID PHTHALIC ACID TEREPHTHALIC ACID BENZOTHIOPHENE INDOLE... 

Two excellent examples of this membrane system have been developed, NS-lOO and PA-300 (5,15). The NS-lOO membrane was made by impregnating a polysulfone support with a 0.67 percent aqueous solution of polyethylenlmine, draining away excess reagent, then contacting the film with a 0.1 percent solution of toluenediisocyanate in hexane. An ultrathln polyurea barrier layer formed at the interface. This membrane was then heat-cured at 110°C. A later version of this membrane was developed (designated NS-101), which used isophthaloyl chloride in place of toluenedilsocyanate, producing a polyamide (16). With either type of membrane, salt rejections in simulated seawater tests at 1000 psi exceeded 99 percent. 

The first reaction, which took place at the interface and which Involved the primary and secondary amine groups of polyethyleni-mlne (PEI) with the difunctional reactant in hexane, proceeded very rapidly at room temperature to produce, in the case of isophthaloyl chloride, a polyamide surface skin (see Reaction I). 

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