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  1. Butyl group - Wikipedia

  2. Butyl rubber - Wikipedia

  3. Butyl Definition & Meaning - Merriam-Webster

  4. All About Butyl Rubber – Properties, Applications, and Uses

  5. Butyl Group - Introduction, Butyl Structure, Preparation and Uses …

  6. Butyl rubber (IIR) | Britannica

  7. Butyl Group | Overview, Structure & Formula - Lesson | Study.com

  8. Material Breakdown: What is Butyl Rubber?

  9. All About Butyl Rubber - Properties, Applications, and Uses

  10. Butyl group | Encyclopedia.com