Thermosetting resin composition and application thereof

[0095] The preparation method of the thermosetting resin composition in this implementation includes the following steps:

[0096] (1) Prepare materials according to formula;

[0097] (2) The block copolymer rubber, the unsaturated diene rubber and the N-substituted maleimide are copolymerized and dissolved in a solvent, a crosslinking agent is added, and a thermosetting resin composition is obtained after dispersion treatment.

[0098] Further, if the composition formula contains flame retardants, inorganic fillers and accelerators, step (2) is to dissolve the block copolymer rubber, unsaturated diene rubber and N-substituted maleimide in the solvent. Add flame retardant, inorganic filler and accelerator, stir evenly, and obtain a low dielectric resin composition after dispersion treatment.

[0099] Perform performance test on the prepared copper clad laminate, the test method is:

[0100] Glass transition temperature (Tg): Use a DMA instrument to test and measure it according to the DMA

[0112] Examples 1-13

[0113] A thermosetting resin composition comprising the following components in parts by weight: block copolymer rubber, unsaturated diene rubber, N-substituted maleimide copolymer, small molecule crosslinking agent, flame retardant, For fillers and accelerators, the source and selection of each component in this embodiment are shown in Table 1, and the content of each component is shown in Table 2.

[0114] Table 1 Sources of raw material components in Examples 1-13 and Comparative Examples 1-3

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[0116] Table 2 Group distribution ratio data of Examples 1 to 13 and Comparative Examples 1 to 3

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[0119] Table 2 Group distribution ratio data of Examples 1-13 and Comparative Examples 1-3 (continued table)

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[0122] Table 3 Group distribution ratio data of Examples 1-13 and Comparative Examples 1-3 (continued table)

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[0125] Table 4 Group distribution ratio data of Examples 1-13 and Comparative Examples 1-3 (co

[0127] Example 11

[0128] A thermosetting resin composition comprising the following components in parts by weight: block copolymer rubber, unsaturated diene rubber, N-substituted maleimide copolymer, small molecule crosslinking agent, flame retardant, Fillers and accelerators, where the content of each component is shown in Table 2.

[0129] Among them, the filler used is high Dk filler (Dk> 10), resulting in an increase in its dielectric loss.