Halogen-free resin composition, bonding sheet and copper-clad laminate
A resin composition and bonding sheet technology, applied in the field of copper clad laminates, can solve the problems of poor mechanical properties, reduced halogen content, high water absorption, etc., and achieve high glass transition temperature, excellent heat resistance, good The effect of flame retardant effect
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preparation example Construction
[0032] The preparation method of described benzoxazine resin is, adopts solution synthesis method, and it comprises steps as follows:
[0033] Step 1. Quantify phenol, primary amine, and aldehyde according to the molar ratio of phenolic hydroxyl, amine, and aldehyde functional groups: (0.8-1.2): (1.5-2.5); the structure of the phenol is selected from one of the following structural formulas: kind:
[0034]
[0035] In formula 2, R1 is O, C=O, S, SO2, alicyclic hydrocarbon groups with 3 to 20 carbon atoms and their derivatives, aliphatic hydrocarbon groups with 1 to 20 carbon atoms and their derivatives, or alicyclic hydrocarbon groups with 2 to 20 carbon atoms 20 unsaturated aliphatic hydrocarbon groups and derivatives thereof,
[0036] or
[0037]
[0038] The primary amine is: NH2R2, wherein R2 is an alicyclic hydrocarbon group with 3 to 20 carbon atoms and its derivatives, an aliphatic hydrocarbon group with 1 to 20 carbon atoms and its derivatives, an unsaturated f...
preparation example 1
[0051] Preparation of Benzoxazine Resin by Solution Synthesis
[0052] At room temperature, dissolve phenol in absolute ethanol, adjust the pH to 8-10, and add toluene, aniline and formaldehyde aqueous solution with the molar ratio of phenolic hydroxyl, amino and aldehyde functional groups at a ratio of 1:1:2. After stirring evenly, heat up to reflux, react for 4 hours and distill ethanol and water toluene under reduced pressure, cool the device, add butanone to obtain a light yellow translucent viscous body, after washing, purification and drying, the benzoxazine resin is obtained , and the yield was 80.5%. The structural formula of the obtained benzoxazine resin is as follows:
[0053]
preparation example 2
[0055] Preparation of Benzoxazine Resin by Solution Synthesis
[0056] Dissolve phenol in absolute ethanol at room temperature, adjust the pH to 8-10, and add toluene, aniline and paraformaldehyde at a molar ratio of phenolic hydroxyl, amine, and aldehyde functional groups of 1:1.2:2.5. After stirring evenly, heat up to reflux, react for 4 hours, and distill ethanol, water, and toluene under reduced pressure, and cool the device to obtain a light yellow translucent viscous body. After washing, purification, and drying, the benzoxazine resin is obtained. The rate is 78.8%. The structural formula of the obtained benzoxazine resin is as follows:
[0057]
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