Novel curing agent for epoxy resin system and application method of novel curing agent
A technology of epoxy resin system and application method, which is applied in the direction of organic chemistry, can solve problems such as poor manufacturability, adverse effects on material properties, high curing temperature, etc., and achieves maintenance of mechanical properties and thermal stability, good storage stability, and reduced Effect of curing temperature
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Embodiment 1
[0028] Compound trimellitic anhydride n-heptyl, its molecular structure formula is as follows:
[0029]
[0030] The synthetic method of above-mentioned compound trimellitic anhydride n-heptyl ester, concrete steps are as follows:
[0031] (1) Take trimellitic anhydride acid chloride, n-heptanol, and dimethylformamide in a molar ratio of 1:1.5:1.3; the amount of solvent 1,2-dichloroethane is 5 times the volume of the reactant;
[0032] Mix the weighed trimellitic anhydride acid chloride and petroleum ether in a three-necked flask, put ice cubes into a water bath, place the three-necked flask in a water bath to control the temperature within the range of -5 to 0°C, start the magnetic stirrer, and make Trimellitic anhydride chloride was dissolved in petroleum ether, and then the weighed n-heptanol was placed in a dropper, and slowly dripped within 20 minutes to obtain a reaction solution; dimethylformamide was added to the above reaction solution, and reacted for 5 hours, and...
Embodiment 2
[0043] A kind of application method of novel curing agent n-heptyl trimellitic anhydride in epoxy resin system, its steps are as follows:
[0044] (1) In terms of parts by mass, weigh 100 parts of E44 epoxy resin, 60 parts of n-heptyl trimellitic anhydride, and dissolve n-heptyl trimellitic anhydride and epoxy resin E44 with 2 parts of acetone, add 1 part of accelerator triethylamine Uniform, molded after fiber impregnation, cured at room temperature for 8 hours;
[0045] (2) Post-curing: the preliminary cured product obtained in step (1) was cured at 110° C. for 4 hours, and then cured at 120° C. for 4 hours to obtain a cured epoxy resin material.
Embodiment 3
[0047] A kind of application method of novel curing agent n-heptyl trimellitic anhydride in epoxy resin system, its steps are as follows:
[0048] (1) In terms of parts by mass, weigh 100 parts of WSR615 epoxy resin, 65 parts of n-heptyl trimellitic anhydride, and 2 parts of DMP-30 accelerator to prepare materials, and use 3 parts of n-heptyl trimellitic anhydride and WSR615 epoxy resin After dissolving dibutyl phthalate, add 1 part of triethylamine as an accelerator, after defoaming, glass fiber reinforced hand lay-up, and curing at room temperature for 6 hours;
[0049] (2) Post-curing: the preliminary cured product obtained in step (1) was cured at 110° C. for 4 hours, and then cured at 130° C. for 2 hours to obtain a cured epoxy resin material.
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