Vinylbenzyl fluorenes containing benzocyclobutene groups, and methods of making and using the same

By preparing vinylbenzylfluorene containing benzocyclobutene groups, the problems of high cost and narrow curing temperature range in the prior art are solved, realizing low-cost industrial production and improving the peel strength between the resin and copper foil, while reducing the dielectric constant and dielectric loss.

CN122102828APending Publication Date: 2026-05-29SUZHOU WEIHUA CHEMICAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUZHOU WEIHUA CHEMICAL CO LTD
Filing Date
2026-02-02
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

The existing technology for preparing benzocyclobutene resins is costly and has a narrow curing temperature range, which easily leads to a large resin curing shrinkage rate and affects the peel strength between the resin and the copper foil.

Method used

Vinylbenzylfluorene containing benzocyclobutene groups is used as a thermosetting crosslinking agent. The benzocyclobutene group and 4-vinylbenzyl group are attached to the active methylene group of fluorene through a two-step electrophilic substitution reaction. Fluorene, 4-bromobenzocyclobutene and 4-vinylbenzyl chloride are used as raw materials. The reaction conditions are controlled to reduce costs and broaden the curing temperature range.

Benefits of technology

It enables low-cost, large-scale industrial production, reduces the curing shrinkage of the resin, improves the peel strength between the resin and the copper foil, and reduces the dielectric constant and dielectric loss.

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Abstract

The application relates to the technical field of heat-curable crosslinking agents, in particular to vinylbenzyl fluorene containing a benzocyclobutene group and a preparation method and application thereof, wherein the preparation method of the vinylbenzyl fluorene containing the benzocyclobutene group comprises the following reaction steps: S1. adding fluorene, a solvent, a strong base and a phase transfer catalyst into a reaction container, adding 4-bromobenzocyclobutene dropwise into the reaction container under inert atmosphere, continuous stirring and constant temperature conditions, sequentially performing treatment of solvent removal under reduced pressure, extraction, washing, solvent removal under reduced pressure in the organic phase, and obtaining a target intermediate product; S2. adding the target intermediate product, 4-vinylbenzyl chloride, a solvent, a weak base and a phase transfer catalyst into a reaction container, performing reaction under inert atmosphere, continuous stirring and constant temperature conditions, sequentially performing treatment of solvent removal under reduced pressure, extraction, washing, solvent removal under reduced pressure in the organic phase and recrystallization, and obtaining the vinylbenzyl fluorene containing the benzocyclobutene group.
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