Novel compound DOPO-MA and synthetic method thereof
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A DOPO-MA, synthetic method technology, applied in chemical instruments and methods, compounds of Group 5/15 elements of the periodic table, organic chemistry, etc., can solve problems such as limitations, easy to cause fire, etc. The effect of easy control and excellent flame retardancy
Inactive Publication Date: 2019-05-07
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology
However, the limiting oxygen index (LOI) of epoxy resin is only 19.8%, which is easy to cause fire and is restricted in many special fields.
Method used
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Embodiment 1
[0028] A kind of compound DOPO-MA, its molecular structural formula is as follows:
[0029]
[0030] Above-mentioned compound synthesis method, the steps are as follows:
[0031] Under inert gas, in a device equipped with a thermometer, condensing reflux, and magnetic stirring, completely dissolve DOPO in toluene, then add maleic anhydride, react at 110 ° C for 10 h, cool to room temperature after the reaction, and then Filter and wash with ethanol for 3 to 4 times to obtain the product.
Embodiment 2
[0033] Compound DOPO-MA, its synthetic method is as follows:
[0034] Under inert gas, in a device equipped with a thermometer, condensing reflux, and magnetic stirring, completely dissolve DOPO in toluene, then add maleic anhydride, react at 110°C for 12h, cool to room temperature after the reaction, and then Filter and wash with ethanol for 3 to 4 times to obtain the product.
Embodiment 3
[0036] Compound DOPO-MA, its synthetic method is as follows:
[0037] Under inert gas, in a device equipped with a thermometer, condensing reflux, and magnetic stirring, completely dissolve DOPO in toluene, then add maleic anhydride, react at 110°C for 14h, cool to room temperature after the reaction, and then Filter and wash with ethanol for 3 to 4 times to obtain the product.
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Abstract
The invention discloses a compound DOPO-MA. The compound DOPO-MA has a molecular structural formula which is described in the specification. The synthetic method for the compound DOPO-MA comprises thefollowing steps: mixing DOPO, maleic anhydride and a solvent under inert gas, carrying out a reaction at a certain temperature for a plurality of hours, subjecting a product to rotary evaporateion, and carrying out standing. The compound DOPO-MA has a molecular structure which contains an acid anhydride group used for curing epoxy resin and contains a phosphorus element with a certain flame retardant effect, so the DOPO-MA is used as a flame-retardant curing agent of epoxy resin.
Description
technical field [0001] The invention belongs to the technical field of epoxy resin materials, in particular to a compound DOPO-MA and a synthesis method thereof. Background technique [0002] Epoxy resin has excellent mechanical properties, chemical corrosion resistance, electrical insulation, processing performance, and adhesive performance. At the same time, due to the low volatility of epoxy resin during curing, no small molecules are formed, so that its shrinkage is low, and it can be used in coatings. , Adhesives, printed circuit boards, electronic packaging materials, composite materials, aerospace and automotive and other fields are widely used. However, the limiting oxygen index (LOI) of epoxy resin is only 19.8%, which is easy to cause fire and is restricted in many special fields. [0003] Flame retardants can be divided into halogen-containing flame retardants and halogen-free flame retardants according to whether they contain halogen elements. Among them, haloge...
Claims
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