Environment-friendly modified benzoxazine resin and preparation method thereof
A benzoxazine and environment-friendly technology, which is applied in the field of environment-friendly modified benzoxazine resin and its preparation, can solve the problem of low carbon residue rate of benzoxazine resin, low molecular regularity of resin, and uneven molecular weight distribution. Concentration and other issues to achieve the effect of improving heat resistance, improving resin thermal stability and mechanical properties, and good heat resistance
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[0031] Example one
[0032] In this embodiment, the present invention provides an environmentally friendly modified benzoxazine resin and a preparation method thereof, and the present invention provides an environmentally friendly modified benzoxazine resin, according to a mass part, including: six 35 parts of chlorine cycloalkitrile, 70 parts of acetaminophenol, 90 parts of the 4-maleimide-phyllophenol, 90 parts of formaldehyde; calculated by mass parts, catalysts include 4 parts of potassium carbonate, sodium hydroxide 0.2 parts. The solvent is acetone, methanol, tetrahydrofuran.
[0033] Specifically, the following steps:
[0034] S1. In the reactor, 35 parts of solvent acetone, hexachlorocyclic triaphoonitrile and 70 parts of acetaminophenol were stirred and dissolved, and 4 parts of potassium carbonate were added, and the first heating was heated to 60 ° C. For the first return reaction, the reflux reaction time is 24 h, the return reaction end, the first cooling, cooling to ...
Example Embodiment
[0055] Example 2
[0056] In this embodiment, the present invention provides an environmentally friendly modified benzoxazine resin and a preparation method thereof, and the present invention provides an environmentally friendly modified benzoxazine resin, according to a mass part, including: six 25 parts of chloride cycloalkitrile, 60 parts of acetaminophenol, 4- maleimide threslophenols, 80 parts of formaldehyde; calculated according to mass parts, catalysts include 4 parts of potassium carbonate, sodium hydroxide 0.2 parts The solvent is acetone, methanol, tetrahydrofuran.
[0057] Specifically, the following steps:
[0058] S1. In the reactor, 25 parts of solvent acetone, hexachlorocyclic triaphoonitrile and 60 parts of the acetaminophenol were stirred and dissolved, and 4 parts of potassium carbonate was added, and the first heating was heated to 57 ° C. For the first return reaction, the reflux reaction time is 28 h, the reflow reaction ends, the first cooling, cooling to 35...
Example Embodiment
[0061] Example three
[0062] In this embodiment, the present invention provides an environmentally friendly modified benzoxazine resin and a preparation method thereof, and the present invention provides an environmentally friendly modified benzoxazine resin, according to a mass part, including: six 40 parts of chlorine cycloalkitrile, 75 parts of acetaminophenol, 100 parts of 4-maleimide, 100 parts of formaldehyde; calculated by mass parts, catalysts include 4 parts of potassium carbonate, sodium hydroxide 0.2 parts. The solvent is acetone, methanol, tetrahydrofuran.
[0063] Specifically, the following steps:
[0064] S1. In the reactor, 40 parts of solvent acetone, hexachlorocyclic triaphoonitrile, and stirred with acetaminophenol, stirred and dissolved, 4 parts of potassium carbonate, first heating, heating to 65 ° C for the first time. The first reflux reaction was performed, the reflux reaction time was 36 h, the reflux reaction ended, the first cooling, cooled to 34 ° C, w...
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