摘要:
The present invention is an aqueous dispersion of a stable polynitrile oxide represented by the structure: R-(C≡N-O-)x, whre x is an integer greater than 1, R is an aromatic, aliphatic, or cycloaliphatic group having at least one substituent adjacent to each nitrile oxide group, the substituent characterized by inhibiting dimerization of nitrile oxide, and being non-interfering with a reaction between nitrile oxide groups and unsaturated groups. The present invention is also a method of curing a latex having a polyunsaturated disperse phase, comprising the steps of: a) mixing the latex with a stable polynitrile oxide; and b) removing water form the mixture. The present invention provides a simple means of preparing one-part coating systems that can be cured at room temperature without the release of by-products.
摘要:
Nitrile oxide compounds are extremely reactive toward multiple bonds in organic compounds and polymers. This high level of reactivity allows for dinitrile oxides to cure (crosslink) olefin-containing polymers under very mild conditions. This invention discloses a process for the synthesis of stable aryl nitrile oxides which comprises the sequential steps of (1) halomethylating a halomethyl group onto a substituted aromatic compound having at least one substituent group selected from the group consisting of alkyl groups, aryl groups, fused aryl groups, alkaryl groups, halogen atoms, alkoxy groups and nitro groups, wherein said halomethyl group is halomethylated onto a position that is ortho to at least one of the substituent groups on the substituted aromatic compound; (2) converting the ortho halomethylated-substituted aromatic compound into an ortho-substituted aromatic aldehyde by reacting the ortho halomethylated-substituted aromatic compound with a salt selected from the group consisting of sodium 2-nitropropane and potassium 2-nitropropane in a lower alcohol solvent; (3) converting the ortho-substituted aromatic aldehyde into an ortho-substituted aromatic oxime by reacting the ortho-substituted aromatic aldehyde with hydroxylamine; and (4) converting the ortho-substituted aromatic oxime into the ortho-substituted aryl nitrile oxide by reacting the ortho-substituted aromatic oxime with an aqueous sodium hypochlorite solution at a temperature which is within the range of about -5°C to about 20°C.
摘要:
Disclosed are solid, concentrated, amine oxide surfactant compositions containing amine oxide-maleic acid salts. The molar ratio of maleic acid to amine oxide in such salts is about a 1:1. The salts are soluble in water at 25 DEG C at a pH of above the pKa of the amine oxide. Also disclosed is a process for preparing such solid amine oxide surfactant compositions, which process comprises admixing maleic acid and amine oxide surfactants in at least about a 1:1 molar ratio, at a pH of at least about 1 unit less than the pKa of the amine oxide, to thereby form a visible precipitate therein. The precipitate is separated from the mixture, preferably by mechanical means, and dried. The dried precipitate is a maleic acid-amine oxide salt which can be incorporated into cleaning products, especially solid or granular cleaning products, as a solid, concentrated source of amine oxide surfactant.
摘要:
Nitrile oxide compounds are extremely reactive toward multiple bonds in organic compounds and polymers. This high level of reactivity allows for dinitrile oxides to cure (crosslink) olefin-containing polymers under very mild conditions. This invention discloses a process for the synthesis of stable aryl nitrile oxides which comprises the sequential steps of (1) halomethylating a halomethyl group onto a substituted aromatic compound having at least one substituent group selected from the group consisting of alkyl groups, aryl groups, fused aryl groups, alkaryl groups, halogen atoms, alkoxy groups and nitro groups, wherein said halomethyl group is halomethylated onto a position that is ortho to at least one of the substituent groups on the substituted aromatic compound; (2) converting the ortho halomethylated-substituted aromatic compound into an ortho-substituted aromatic aldehyde by reacting the ortho halomethylated-substituted aromatic compound with a salt selected from the group consisting of sodium 2-nitropropane and potassium 2-nitropropane in a lower alcohol solvent; (3) converting the ortho-substituted aromatic aldehyde into an ortho-substituted aromatic oxime by reacting the ortho-substituted aromatic aldehyde with hydroxylamine; and (4) converting the ortho-substituted aromatic oxime into the ortho-substituted aryl nitrile oxide by reacting the ortho-substituted aromatic oxime with an aqueous sodium hypochlorite solution at a temperature which is within the range of about -5°C to about 20°C.
摘要翻译:腈类化合物对有机化合物和聚合物中的多个键具有极大的反应性。 这种高水平的反应性允许二腈氧化物在非常温和的条件下固化(交联)含烯烃聚合物。 本发明公开了一种合成稳定的芳基氧化腈的方法,其包括以下顺序步骤:(1)将卤代甲基卤化成具有至少一个选自烷基,芳基,稠合的取代基的取代芳族化合物 芳基,烷芳基,卤素原子,烷氧基和硝基,其中所述卤代甲基被卤甲基化到取代的芳族化合物上至少一个取代基的邻位的位置; (2)通过邻位卤代甲基取代的芳族化合物与选自2-硝基丙烷钠和2-硝基丙烷酸钾的盐在低级醇溶剂中反应,将邻甲基取代的芳族化合物转化为邻位取代的芳族醛 ; (3)通过邻位取代的芳族醛与羟胺反应将邻位取代的芳族醛转化成邻位取代的芳族肟; 和(4)通过邻位取代的芳族肟与次氯酸钠水溶液在约-5℃至约20℃的温度下反应将邻位取代的芳族肟转化为邻位取代的芳基氧化腈 DEG C.
摘要:
The invention relates to a 1,3-dipolar compound comprising an ester function of carboxylic acid, and to a dienic rubber composition reinforced by an inorganic charge. Such a composition has an improved compromise of rigidity, cohesion and hysteresis properties.
摘要:
Disclosed are solid, concentrated, amine oxide surfactant compositions containing amine oxide-maleic acid salts. The molar ratio of maleic acid to amine oxide in such salts is about a 1:1. The salts are soluble in water at 25° C at a pH of above the pKa of the amine oxide. Also disclosed is a process for preparing such solid amine oxide surfactant compositions, which process comprises admixing maleic acid and amine oxide surfactants in at least about a 1:1 molar ratio, at a pH of at least about 1 unit less than the pKa of the amine oxide, to thereby form a visible precipitate therein. The precipitate is separated from the mixture, preferably by mechanical means, and dried. The dried precipitate is a maleic acid-amine oxide salt which can be incorporated into cleaning products, especially solid or granular cleaning products, as a solid, concentrated source of amine oxide surfactant.
摘要:
The present invention provides a compound of the formula (I) :
wherein, R 1 is a hydrogen atom or a hydrocarbon group; R 2 is -R 4 -R 5 ; R 3 is -R 4 -R 5 or -R 4 -R 6 ; R 4 is a divalent organic group; R 5 is OH, SH, COOH or NHR 9 ; R 9 is a hydrogen atom or an alkyl group having 1-6 carbon atoms; and R 6 is a hydrogen atom or an alkyl group having 1-6 carbon atoms.
摘要:
The present invention provides a novel method of labelling biological targeting molecules (BTMs) of interest with radioiodine. Also provided are novel radioiodinated BTMs prepared using the method, as well as radiopharmaceutical compositions comprising such radioiodinated BTMs. The invention also provides radioiodinated intermediates useful in the method, as well as in vivo imaging methods using the radioiodinated BTMs.