Linear polyphosphazene compound and preparation method and application thereof
A compound and a technology for polydichlorophosphazene, which are applied in the field of linear polyphosphazene compounds and their preparation, can solve problems such as unfavorable large-scale production, complex synthesis method, limited types, etc., and achieve easy storage and transportation, simple preparation method, high value-added effects
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[0093] Use of the compound of the present invention or the compound prepared by the method for preparing the compound of the present invention
[0094] In the third aspect of the present invention, the present invention proposes the use of the compound of the foregoing embodiment or the compound prepared by the method of preparing the compound of the foregoing embodiment as a catalyst in a polymerization reaction. According to the embodiments of the present invention, the compounds of the above-mentioned embodiments of the present invention or the compounds prepared by the method of preparing the compounds of the above-mentioned embodiments can be used as catalysts for preparing polymers, such as ester copolymers, ether copolymers, and polyesters, Polyether, polycarbonate copolymer, and the prepared polymer product structure is easy to control, and the variety is rich. At the same time, the product does not contain heavy metal elements, has low catalyst residue, good biocompatibil...
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[0106] Example 1
[0107] Preparation of polydichlorophosphazene
[0108]
[0109] Add purified hexachlorocyclotriphosphazene (3.5g) and catalyst into the narrow-necked glass tube, and use a flame spray gun to melt the narrow-neck of the glass tube under vacuum, then put it in and preheat it to 250℃ In the oil bath, stop heating when the material in the tube changes from the molten hexachlorocyclotriphosphazene to a non-flowable translucent gel. Cut the glass tube, add dry n-hexane to remove unreacted hexachlorocyclotriphosphazene, then add dry tetrahydrofuran under the protection of nitrogen to dissolve the product linear polydichlorophosphazene, filter out the insoluble cross-linked product, and obtain poly Dichlorophosphazene solution in tetrahydrofuran. M n, GPC =11500g mol -1 , M w / M n = 1.03.
Example Embodiment
[0110] Example 2
[0111] Preparation of Tris(dimethylamine)phosphazene / dimethylamino group substituted linear polyphosphazene
[0112]
[0113] Under nitrogen protection, polydichlorophosphazene (3.5g, containing phosphorus-nitrogen double bond 30mmol, 3.0equiv.) 60mL of tetrahydrofuran solution and triethylamine (8.3mL, 60mmol, 6.0equiv.) were added to 250mL equipped with a condenser reflux tube Place in a three-necked flask in a low temperature bath at -30°C and keep stirring. Continue to add tris (dimethylamine) phosphazene (5.3 g, 30 mmol, 3.0 equiv.) dropwise to the reaction system to maintain the solution temperature below -20°C. After the dripping is completed, the temperature of the system is naturally raised to 20°C, placed in an oil bath, and reacted under reflux for 12 hours. The temperature of the system was lowered to -50°C again, and dimethylamine (2.7g, 60mmol, 6.0 equiv.) was introduced, raised to 20°C, and the reaction was continued for 2 hours. The insoluble m...
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