4-Vinylbenzocyclobutene

4-Vinylbenzocyclobutene is a high-purity pharmaceutical-intermediates supplied for industrial and specialty chemical applications. Contact our team for specifications, packaging options and lead times.

4-Vinylbenzocyclobutene (CAS 99717-87-0) is a specialized organic monomer used in advanced polymer and materials applications. Its structure-a benzene ring fused to a cyclobutene ring with a vinyl substituent-provides both a reactive vinyl site and a strained four-membered ring that can be opened to generate highly reactive intermediates. This enables the production of densely cross-linked, high-performance polymers such as benzocyclobutene (BCB) resins through thermal ring-opening and radical polymerization. These polymers exhibit low dielectric constants, high thermal stability, and low moisture uptake, which are valuable in microelectronics for dielectric layers, interlayer insulators, and encapsulants in semiconductor devices and printed circuit boards. Additionally, it is used as a comonomer or branching agent in specialty polymer systems, contributing to improved mechanical and thermal properties, and serves as an intermediate for enhancing crosslinking in advanced polymer materials.

The benefits of 4-Vinylbenzocyclobutene arise from its dual reactivity and the high performance of materials derived from it. The strained cyclobutene ring undergoes thermal ring-opening to form reactive intermediates that facilitate efficient cross-linking and polymer network formation, producing polymers with exceptional thermal stability, mechanical strength, and chemical resistance. Polymers incorporating this monomer typically have low dielectric constants and low moisture absorption, improving reliability in high-frequency and high-performance applications. The vinyl group allows conventional radical polymerization or copolymerization, offering flexibility in polymer architecture. Its liquid form and compatibility with standard processing techniques make it suitable for both research-scale and industrial applications.

4-Vinylbenzocyclobutene (CAS 99717-87-0) is a high-value monomer and intermediate for producing advanced polymers with excellent thermal, mechanical, and dielectric properties. Its reactive vinyl group and strained cyclobutene ring enable diverse polymerization strategies and finely tuned polymer networks. These characteristics make it particularly advantageous for microelectronics, high-performance composites, and specialty material applications, supporting the development of durable and reliable advanced materials.

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