Alkyl-containing phthalonitrile monomer with autocatalytic curing effect, preparation method and application thereof
A technology of nitrophthalonitrile and phthalonitrile, which is applied in the field of phthalonitrile compounds and its preparation, can solve problems such as accelerating the curing of phthalonitrile resins, and achieve thermal stability and thermal oxidation Excellent stability and improved curing rate
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[0030] Example 1
[0031] (1) Preparation of monomer
[0032] Using 3.01g bisphenol F (CAS number: 620-92-8), 4-nitrophthalonitrile and potassium carbonate as raw materials, the molar ratio of bisphenol F to 4-nitrophthalonitrile is 1.0 :2.3, the molar ratio of bisphenol F to potassium carbonate is 1.0:1.1;
[0033] The structure of bisphenol F is as follows:
[0034]
[0035] Dissolve bisphenol F and 4-nitrophthalonitrile in 20 mL of NMP solvent, then add potassium carbonate to the solution, and keep the reaction at 30°C for 12 hours. After the reaction, the reaction solution was washed twice with deionized water and methanol, and the filter cake was collected, and the filter cake was dried to a constant weight to obtain the phthalonitrile monomer derived from bisphenol F. 1 The H-NMR structural formula is as follows:
[0036]
[0037] (2) Preparation of phthalonitrile resin
[0038] The alkyl group-containing phthalonitrile monomer with autocatalytic curing properties prepared in ste...
Example Embodiment
[0041] Example 2
[0042] (1) Preparation of monomer
[0043] Using 3.2g of dihydric phenol (CAS number: 2081-08-5), 4-nitrophthalonitrile and potassium carbonate as raw materials, the molar ratio of dihydric phenol to 4-nitrophthalonitrile is 1.0 :2.3, the molar ratio of dihydric phenol to potassium carbonate is 1.0:1.1;
[0044] The structure of dihydric phenol is as follows:
[0045]
[0046] The dihydric phenol and 4-nitrophthalonitrile were co-dissolved in 25 mL of NMP solvent, then potassium carbonate was added to the solution, and the reaction was kept at 30°C for 10 hours. After the reaction, the reaction solution was washed twice with deionized water and methanol, and the filter cake was collected. The filter cake was dried to a constant weight to obtain the corresponding dihydric phenol-derived phthalonitrile monomer. 1 The H-NMR structural formula is as follows:
[0047]
[0048] (2) Preparation of phthalonitrile resin
[0049] The alkyl-containing phthalonitrile monomer wit...
Example Embodiment
[0052] Example 3
[0053] (1) Preparation of monomer
[0054] With 3.3g of dihydric phenol (CAS number: 1576-13-2), 4-nitrophthalonitrile and potassium carbonate as raw materials, the molar ratio of dihydric phenol to 4-nitrophthalonitrile is 1.0 :2.3, the molar ratio of dihydric phenol to potassium carbonate is 1.0:1.1;
[0055] The structure of dihydric phenol is as follows:
[0056]
[0057] The dihydric phenol and 4-nitrophthalonitrile were co-dissolved in 26 mL of DMSO solvent, then potassium carbonate was added to the solution, and the reaction was kept at 25°C for 15 hours. After the reaction, the reaction solution was washed twice with deionized water and methanol, and the filter cake was collected. The filter cake was dried to a constant weight to obtain the corresponding dihydric phenol-derived phthalonitrile monomer. 1 The H-NMR structural formula is as follows:
[0058]
[0059] (2) Preparation of phthalonitrile resin
[0060] The alkyl group-containing phthalonitrile monom...
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