1156-51-0Relevant articles and documents
Structure of 2,2'-bis(4-cyanatophenyl)isopropylidene
Davies, Jonathan M. R.,Hamerton, Ian,Jones, John R.,Povey, David C.,Barton, John M.
, p. 285 - 289 (1990)
The title compound is monoclinic: a = 13.345(3), b = 11.393(2), c = 10.046(5) Angstroem, β = 108.48(2) deg, Z = 4, P21/c.The structure was determined by direct methods, using MoKα diffractometer data, and refined by full-matrix least squares to R = 0.045 for 1463 reflections.The structure shows a central tetrahedral carbon atom surrounded by two methyl and two phenylcyanate groups.The geometry of the cyanate group compares well with that in 4-chloro-3,5-dimethylphenyl cyanate, the only example of an organic cyanate in the Cambridge Crystallographic data-base (V.3).The intermolecular nitrile, C-H, distances were examined for evidence of a possible dimerization interaction; no significant distances were found.
Cyanate ester resin synthesis method
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Paragraph 0024-0035; 0043-0046, (2020/06/20)
The invention belongs to the field of synthesis of organic polymers, and particularly relates to a cyanate ester resin synthesis method. According to the method, the cyanogen halide and the bisphenolcompound are dissolved in the same solvent at the same time, and then a triethylamine/isopropanol catalyst is dropwise added into the solvent, so that the reaction time can be shortened, the reactionefficiency can be improved, the use amount of the solvent can be reduced, the problems of dissolution and dropwise addition of the bisphenol compound can be avoided, and the method is also suitable for some indissolvable special phenols. By adopting a triethylamine/isopropanol synthesis system, side reactions can be reduced, and the product purity can be improved. Starting from the dosage ratio ofthe raw materials, the bisphenol compound is excessive, so that the generation of other cyanides in the reaction solution can be avoided, and green production is realized.
METHOD FOR PRODUCING CYANOGEN-HALIDE, CYANATE ESTER COMPOUND AND METHOD FOR PRODUCING THE SAME, AND RESIN COMPOSITION
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Paragraph 0284; 0285, (2015/12/09)
A method for efficiently producing a cyanogen halide with suppressed side effects, and a method for producing a high-purity cyanate ester compound at a high yield includes contacting a halogen molecule with an aqueous solution containing hydrogen cyanide and/or a metal cyanide, so that the hydrogen cyanide and/or the metal cyanide is allowed to react with the halogen molecule in the reaction solution to obtain the cyanogen halide, wherein more than 1 mole of the hydrogen cyanide or the metal cyanide is used based on 1 mole of the halogen molecule, and when an amount of substance of an unreacted hydrogen cyanide or an unreacted metal cyanide is defined as mole (A) and an amount of substance of the generated cyanogen halide is defined as mole (B), the reaction is terminated in a state in which (A):(A)+(B) is between 0.00009:1 and 0.2:1.
Synthesis and characterization of new polynuclear bis-5-oxy-1H-tetrazoles
Mansoori,Sarvari,Zamanloo,Imanzadeh
experimental part, p. 154 - 157 (2009/09/06)
Different bis-phenols reacted with cyanogen bromide in the presence of triethylamine as base to give the corresponding bis-cyanates which were treated with sodium azide in acetone as solvent to produce new bis(5-oxy-1H-tetrazole) derivatives. One more bis-tetrazole derivative was synthesized by reaction of 5-(4-aminophenoxy)-1H-tetrazole with adipoyl chloride. The prepared compounds were characterized by usual spectroscopic techniques.
Mesogenic polycyanates and thermosets thereof
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, (2008/06/13)
Novel polycyanate and polycyanamide compositions containing one or more mesogenic or rodlike moieties, when cured, result in products having improved properties.
Cyanate functional maleimides
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, (2008/06/13)
Thermoset products are prepared by polymerizing (A) at least one thermosettable compound which contains both a maleimide group and a cyanate group such as 3--(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)phenyl cyanate and optionally (B) at least one of (1) at least one aromatic polycyanate such as bisphenol A dicyanate; (2) at least one polymaleimide such as N,N′-(methylenedi-p--phenylene)bismaleimide; (3) at least one material having an average of more than one vicinal epoxide group per molecule such as a diglycidyl ether of bisphenol A; (4) at least one polymerizable ethylenically unsaturated material such as styrene; or (5) a mixture of any two or more of components 1-4 in any combination.
