Detail of "616-02-4"

Reference

Thickening composition based on heteropolysaccharides

Thickening composition based on heteropolysaccharides. Falcoz, Pierre; Celle, Pierre; Campagne, Jean Claude (Rhone-Poulenc S. A., Fr.). Fr. Demande FR 2299366 27 Aug 1976, 7 pp. (French). (France).There are some reagents with their cas registry numbers 7732-18-5 and 77-92-9 are used in this study. CODEN: FRXXBL. CLASS: IC: C08L005-00. APPLICATION: FR 75-3640 31 Jan 1975. DOCUMENT TYPE: Patent CA Section: 44 (Industrial Carbohydrates) A Ca salt of a polysaccharide, obtained by fermentation of carbohydrates in the presence of Xanthomonas bacteria, was rendered water-sol. by dissoln. in water in the presence of 5-25% of an org. acid or anhydride with pK value 5-7. In examples, the Ca salt of a heteropolysaccharide was dissolved in water at room temp. in the presence of 20, 13, 10, 10, and 12.5%, resp., of maleic [110-16-7], citric [77-92-9], or citraconic acid [498-23-7], or citraconic [616-02-4] or maleic anhydride [108-31-6]. The soln. viscosity increased as the rate of hydration of the biopolymer increased. .

Fire- and heat-resistant adhesive resins based on maleimido and citraconimido substituted 1-[(dialkoxyphosphinyl)methyl]-2,4- and -2,6-diaminobenzenes

Fire- and heat-resistant adhesive resins based on maleimido and citraconimido substituted 1-[(dialkoxyphosphinyl)methyl]-2,4- and -2,6-diaminobenzenes. Mikroyannidis, John A.Chemical with cas number 91987-38-1 also plays role. (Dep. Chem., Univ. Patras, Patras, Greece). J. Polym. Sci., Polym. Chem. Ed., 22(7), 1717-32 (English) 1984. CODEN: JPLCAT. ISSN: 0449-296X. DOCUMENT TYPE: Journal CA Section: 37 (Plastics Manufacture and Processing) Section cross-reference(s): 29 A novel class of fire- and heat-resistant bisimide resins was prepd. by thermal polymn. of maleimido or citraconimido derivs. of 1-[(dialkoxyphosphinyl)methyl]-2,4- and -2,6-diaminobenzenes. The neat bisimide resin [91987-48-3] prepd. by curing 1-[bis(2-chloroethoxyphosphinyl)methyl]-2,4-dimaleimidobenzene [91987-37-0] exhibited a limiting O index 75% higher and a smoke evolution ~30 times lower compared with the parent polymer [37453-16-0] obtained by curing m-phenylenebismaleimide. The char yield of cured bisimide resins at 700° was 58-70% in a N atm. and 35-60% in air. An increase in formula wt. between the imide groups slightly reduced the char yield. The polymer precursors were synthesized by reacting the phosphorus-contg. diamines (1 mol) with maleic anhydride [108-31-6]/citraconic anhydride [616-02-4] (2 mol) or by reacting the monomaleimido deriv. of the P-contg. diamines with benzophenonetetracarboxylic dianhydride [2421-28-5]/methylenebis(4-phenyl isocyanate) [101-68-8] in a 2:1 mol ratio. The monomers were characterized by elemental anal., Fourier-transform IR, proton NMR spectroscopy, and gas chromatog.-mass spectroscopy. Direct cleavage of the P-C bond and inversion of the synthesis reaction may occur during their pyrolysis. The thermal polymn. of the monomers was investigated by DSC. Biscitraconimides are thermally polymd. at a relatively lower temp. than the corresponding bismaleimides. .