3,3',4,4'-Benzophenone tetracarboxylic dianhydride explained

3,3’,4,4’-Benzophenone tetracarboxylic dianhydride (BTDA) is chemically, an aromatic organic acid dianhydride. It may be used to cure epoxy-based powder coatings. It has the CAS Registry Number of 2421-28-5 and a European Community number 219-348-1. It is REACH and TSCA registered. The formula is C17H6O7 with a molecular weight of 322.3.[1] [2]

Uses

Its use in epoxy powder coatings is slightly unusual in that many epoxy coatings are designed to be fairly close to a stoichiometric curing ratio. BDTA cured materials benefit from having the stoichiometry closer to 0.65 rather than 1.[3] It is also used to synthesize polyimides. These have good flexibility because of the carbonyl and keto groups which increase the molecular distancing between the imide rings. This improves the solubility.[4] [5] The resultant product when combined with nano-technology produces composites with enhanced heat stability properties.[6] BTDA has also been used to synthesize other molecules and is thus a reactive ingredient in its own right.[7] [8] [9] [10]

Notes and References

  1. Web site: PubChem . Benzophenone-3,3',4,4'-tetracarboxylic dianhydride, 98% . 2023-08-11 . pubchem.ncbi.nlm.nih.gov . en.
  2. Web site: Benzophenone-3,3′,4,4′-tetracarboxylic dianhydride . SigmaAldrich.
  3. Web site: Toward High Glass-Transition Temperatures in Epoxy Powder Coatings Based on BTDA® . 2023-07-24 . American Coatings Association . en-US.
  4. F. Röhrscheid "Carboxylic Acids, Aromatic" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2012.
  5. Faghihi . Khalil . Ashouri . Mostafa . Hajibeygi . Mohsen . 2013-10-25 . High Temperature and Organosoluble Poly(amide-imide)s Based on 1,4-Bis[4-aminophenoxy]butane and Aromatic Diacids by Direct Polycondensation: Synthesis and Properties . High Temperature Materials and Processes . en . 32 . 5 . 451–458 . 10.1515/htmp-2012-0164 . 97696111 . 2191-0324. free .
  6. Pooladian . Baharak . Alavi Nikje . Mir Mohammad . 2018-12-12 . Preparation and Characterization of Novel Poly(Urethane-Imide) Nanocomposite Based on Graphene, Graphene Oxide and Reduced Graphene Oxide . Polymer-Plastics Technology and Engineering . en . 57 . 18 . 1845–1857 . 10.1080/03602559.2018.1434669 . 103771291 . 0360-2559.
  7. Lu . Yun Hua . Wang . Bing . Xiao . Guo Yong . Hu . Zhi Zhi . 2012 . Synthesis of 1,4-Bis(3-amino-5-trifluoromethylphenoxy)Benzene and Properties of the Polyimide Film Therefrom . Advanced Materials Research . en . 581. 297–300 . 10.4028/www.scientific.net/AMR.581-582.297 . 96413460 . 1662-8985.
  8. Yu . Yang-Yen . Chien . Wen-Chen . Wu . Tsung-Heng . Yu . Hui-Huan . 2011-12-30 . Highly transparent polyimide/nanocrystalline-titania hybrid optical materials for antireflective applications . Thin Solid Films . 38th International Conference on Metallurgical Coatings and Thin Films (ICMCTF 2011) . en . 520. 5 . 1495–1502 . 10.1016/j.tsf.2011.08.002 . 2011TSF...520.1495Y . 0040-6090.
  9. Devaraju . Naga Gopi . Kim . Eung Soo . Lee . Burtrand I . 2005-09-01 . The synthesis and dielectric study of BaTiO3/polyimide nanocomposite films . Microelectronic Engineering . en . 82. 1 . 71–83 . 10.1016/j.mee.2005.06.003 . 0167-9317.
  10. Ding . Fan-Chun . Hsu . Shan-hui . Chiang . Wen-Yen . 2008-07-05 . Synthesis of a new photoreactive gelatin with BTDA and HEMA derivatives . Journal of Applied Polymer Science . en . 109 . 1 . 589–596 . 10.1002/app.28025.

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