1,2,3,4-Cyclobutanetetracarboxylic1,2,3,4-dianhydride CBDA CAS 4415-87-6

Synonyms: Cyclobutane-1,2,3,4-tetracarboxylic dianhydride; 1,2,3,4-Cyclobutanetetracarboxylic dianhydride; Cyclobutanetetracarboxylic acid dianhydride; Tetrahydrocyclobuta[1,2-c:3,4-c′]difuran-1,3,4,6-tetrone; Maleic anhydride cyclic dimer

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Product Details

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1,2,3,4-Cyclobutanetetracarboxylic dianhydride (CBDA, CAS 4415-87-6) is a cycloaliphatic dianhydride primarily used as a monomer in the synthesis of high-performance polyimides and related polymers, providing excellent transparency, low dielectric constant, thermal stability, mechanical strength, and optical properties.

Basic Information of CBDA

Product Name	1,2,3,4-Cyclobutanetetracarboxylic1,2,3,4-dianhydride
Abbreviation	CBDA
CAS Number	4415-87-6
Molecular Formula	C8H4O6
Molecular Weight	196.11 g/mol
Appearance	White to light yellow powder to crystal
Purity	≥99%
Package	1kg/bottle, 20kg/drum, or customized
Molecular formula

Key Properties

Monomer for "transparent / low-color polyimide" films and coatings
Used in polyimide / poly(amic acid) systems for liquid crystal alignment layers and optoelectronics
High performance polymers requiring a balance of transparency, thermal stability, and mechanical strength
Dielectric / insulating materials in microelectronics with reduced PD (photo-darkening) effects

Key Applications of CBDA

Electronics and Semiconductors: Employed in high-frequency circuit substrates, chip packaging, electronic coatings, adhesives, semiconductor encapsulation, and materials for high-performance organic thin-film transistors, leveraging its low dielectric constant and thermal resistance.

Display Technologies: Utilized in colorless polyimide (CPI) films, clear polyimide films and varnishes, flexible OLED panels, and liquid crystal alignment layers for displays.

Optical and Telecommunications: Applied in optical waveguides for 5G signaling and optical communication, photonic devices, and photosensitive polyimides.

Aerospace: Incorporated into engine insulation layers and structural composites for high-temperature and demanding environments.

Other Industrial and Research Uses: Involved in the preparation of biologically and pharmacologically active molecules, as well as poly(amic acid) with high molecular weight for advanced polymer applications.

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