Thermosetting resin composition and prepregs and laminates produced by using the same
A technology of resin composition and prepreg, applied in synthetic resin layered products, applications, household appliances, etc., can solve the problems of insufficient rigidity, low heat resistance, poor adhesion, etc.
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Synthetic example 1
[0068] Put N-(4-hydroxyphenyl)maleimide (500g, 2.66mol), phenol (50g, 0.532mol) and oxalic acid (20g) into a three-necked flask equipped with a thermometer, a condenser, and a stirrer, and mix After stirring evenly, place it in a constant temperature water bath at 70°C; then, under stirring, add formaldehyde solution (210mL, 37% formaldehyde aqueous solution, the ratio of phenol / aldehyde is 1 / 0.8) dropwise to the flask for 0.5 hours; After formaldehyde, maintain the temperature of 70°C and stir for 15 hours; then, dissolve and dilute the reaction product with 1000mL acetone, and then precipitate the reaction product with 40% methanol aqueous solution; repeat the above dissolution-precipitation operation 3~5 times, It was filtered, separated, and dried to obtain a pure nitrogen-containing polyfunctional phenolic compound; Add 10-phosphophenanthrene-10-oxa (287g, 0.270mol) into a three-necked flask equipped with a thermometer, condenser, and stirrer, add 2000mL of toluene-tetrah...
Synthetic example 2
[0074] With reference to the method for synthetic example 1, the phosphorus-containing maleimide ester (B-2) of following structure is obtained:
[0075]
[0076] Among them, Ar is , R is: phenyl;
[0077] Among them, n is 1~10, x is 1~20, y is 1~10, z is 1~20, the ratio of (x+z) to y is 5:1, and the ratio of x to z is 0.5:1. Among them, the N content is 2.77%, and the phosphorus content is 4.09%.
Synthetic example 3
[0079] With reference to the method for synthetic example 1, the phosphorus-containing maleimide ester (B-3) of following structure is obtained:
[0080]
[0081] Among them, Ar is , R is: phenyl;
[0082] Among them, n is 1~10, x is 1~20, y is 1~10, z is 1~20, the ratio of (x+z) to y is 5:1, and the ratio of x to z is 0.2:1.
[0083] Among them, the N content is 2.62%, and the phosphorus content is 4.64%.
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