Maleic acid bis

CAS 142-16-5 EINECS/ELINCS 205-524-5 Synonyms 2-Butenedioic acid (Z)-, bis (2-ethylhexyl) ester DEFIM Diethylhexyl maleate (INCI) Di (2-ethylhexyl) maleate Maleic acid, bis (2-ethylhexyl) ester... 

Maleic acid, bis (2-ethylhexyl) ester. Bis (2-ethylhexyl) maleate... 

Bis (2-ethylhexyl) malate. See Dioctyl malate Bis (2-ethylhexyl) maleate CAS 142-16-5 EINECS/ELINCS 205-524-5 Synonyms 2-Butenedioic acid (Z)-, bis (2-ethylhexyl) ester DEHM Diethylhexyl maleate (INCI) Di (2-ethylhexyl) maleate Maleic acid, bis (2-ethylhexyl) ester Maleic acid, di-(2-ethylhexyl) ester Definition Diester of 2-ethylhexyl alcohol and maleic acid Empirical C20H36O4 Formula CsHijOCOCH—CHCOOCsHij Properties Liq. insol. in water m.w. 340.56 dens. 0.9436 (20/20 C) m.p. -60 C b.p. 164 C (10 mm) flash pt. 365 F... 

C22H40O4 maleic acid bis-(3,5,5-trimethyl-hexyl) ester 60100-39-2... 

Trade Names Alcosperse 175 Sokalan CP 5 Sokalan CP 5 Powder Sokalan CP 7 Sokalan CP 7 Granules Sokalan CP 7 Powder Sokalan CP 45 Sokalan CP 45 Granules Sokalan CP 45 Powder Maleic acid anhydride. See Maleic anhydride Maleic acid, bis (2-ethylhexyl) ester. See Bis (2-ethyihexyi) maieate Maleic acid copolymer, sodium sail... 

The methylated maleic acid adduct of phthalic anhydride, known as methyl nadic anhydride VI, is somewhat more useful. Heat distortion temperatures as high as 202°C have been quoted whilst cured systems, with bis-phenol epoxides, have very good heat stability as measured by weight loss over a period of time at elevated temperatures. The other advantage of this hardener is that it is a liquid easily incorporated into the resin. About 80 phr are used but curing cycles are rather long. A typical schedule is 16 hours at 120°C and 1 hour at 180°C. 

The original compound, maleimide (2,5-dioxo-A -pyrroline), is synthesized by the cyclo-condensation of ammonia and maleic acid. Similarly, primary amine is added to maleic anhydride, followed by cyclocondensation, to form N-substituted maleimide (Fig. 2). This reaction is applied to the preparation of bis-maleimides (BMl) [1]. At first, BMI was used as a crosslinking agent for natural rubber (NR). An o-dichlorobenzene solution of NR was crosslinked by BMI at I08-150°C in the presence of peroxides. The radicals generated from peroxides react with the double bonds of both BMI and NR [ 1 ]. 

With respect to the reaction products, the catalysts can be classified into three groups. The first group is very acidic in nature (Bi/Mo = 0—0.3) and converts olefins to acidic products (e.g. butene to maleic anhydride), the second group has medium acidity (Bi/Mo = 0.5—3) and provides the optimal conditions for the dehydrogenation of butene to butadiene, while the third group (Bi/Mo > 3), which has a basic character, only forms combustion products. 

Cis- and /ra s-isomers sometimes differ in their half-wave potentials, so that the individual isomers can be distinguished and in some instances their mixtures analysed. Differences in the values for cis- and trans-isomers have been reported for azocompounds (115, 116) (but cf. (117 bis 119)), oximes (120), unsaturated carbonyl compounds (121—123), unsaturated hydrocarbons (124), etc. In some cases, the heights of the waves of isomers at a given pH, or the pK values differ, so that mixtures of isomers can be analysed. This is possible for mixtures of fumaric and maleic acids (125—128), citraconic and mesaconic acids (125), etc. 

Frkanec, L., Jokic, M., Makarevic, J., Wolsperger, K., Zinic, M., Bis(PheOH) maleic acid amide-fumaric acid amide photoizomerization induces microsphere-to-gel fiber morphological transition The photoinduced gelation system. J. Am. 

Fig. 6. A proton-sponge (a) l,8-Bis(dimethylamino)napthalene in the pristine form (b) after protonation using 1,2-dichloro maleic acid. The contour maps of the corresponding Laplacians are shown at logarithmic intervals in (c) and (d), respectively (reproduced with permission from Mallinson et al. [56,57]).

Malonate and the dianions of the other aliphatic dicarboxylic acids H02 C(CH2 ) CO,H (n = 1-8) have been isolated as crystalline hydrates, and some of these have been dehydrated.293 X-Ray structural analyses have been reported for the malonate dihydrate,294 which has trans H2Os and bridging malonates of type (110), and for the succinate tetrahydrate and adipate dihydrate 295 the succinate reputedly has a trans- fAn02 (H2 0)4 ] polyhedron with bridging dicarboxylate, presumably as in (109). The monoanion of maleic acid (111) is only unidentate in crystalline [Mn(H-maleate)2-(H20)4] 296 but the equivalent compound of phthalic acid is a bis-chelated octahedral [Mn(0,0)2 (H2 0)2] species.297 Clearly other interactions in the solids, as well as the bonding interactions with Mn", define structure in the carboxylate compounds. 

An unexpected addition of RsPbPbRs to multiple bonds was reported by Gilman and Leeper i in 1951. They suggested that the reaction of Ph3PbPbPh3 with maleic anhydride led to 2,3-bis(triphenylplumbyl)succinic anhydride. However, in 1964, Willemsens ° noted that the product of the reaction was apparently diphenylplumbylen maleate formed from an admixture of maleic acid, which was present in its anhydride. This conclusion was corroborated by the absence of any reaction of Ph3PbPbPh3 with pure maleic anhydride. The formation of diphenylplumbylen maleate (along with Ph4Pb) was assumed to result from decomposition of an intermediate product bis(triphenylplumbyl) maleate. 

The reaction has been thoroughly investigated, especially with regard to reaction conditions, as it has been observed that different by-products can be formed. There is a marked effect of the reaction medium on the condensation between maleic anhydride and hydrazine. For instance, if hydrazine hydrate is added to 2 moles of the anhydride in acetic acid, the linear hydrazide (23) is formed. In ether or alcohol as solvent a mixture of products is formed and besides 23 the formation of the monohydrazide (24) has been assumed, as this upon heating is transformed into maleic hydrazide (21, R = Bi = R2 = H). Likewise, 23 is converted into maleic hydrazide and maleic acid at elevated temperature, and moreover this reaction occurs in aqueous solution. Another possible reaction product, A-aminomaleimide (25, R = Rx = R2 = H) or analogs, was reported first by Curtius although later workers reported failure to obtain these compounds, ... 

Oxonium salts alkylate diamides of dicarboxylic acids twice, provided the amide groups are separated by at least two carbon atoms,thus the bis(dimethylamides) of maleic acid or terephthalic acid have been converted to dications (69 Scheme 4) by means of oxonium salts. ... 

Bis(1-octyl) maieate 2-Butenedloic acid (2Z)-, dioctyl ester 2-Butenedioic acid (Z)-, dioctyl ester Di-n-oc l maieate Dioctyl maieate EINECS 220-835-6 Maleic acid, dioctyl ester Octomer DOM PX-538. Reagent grade plasticizer and chemical intermediate, e g. for the production of sulfosuccinates. Aristech Tiarco. 

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