85-42-7

Description

Hexahydrophthalic anhydride (HHPA) is a versatile compound with diverse applications, ranging from its fundamental role as a hardener in epoxy resin systems to its use in the synthesis of various chemical compounds. Its resistance to yellowing makes it particularly valuable in casting and coating applications where maintaining color stability is essential.

Chemical Properties

Appears as a white crystalline powder. Can also exist as a clear liquid.

Uses

Epoxy Resin Hardener:

Primarily used as a hardener in epoxy resin systems.
Intermediate for Various Compounds:

Used as an intermediate for coating resins (alkyds, polyesters).
Employed in the synthesis of plasticizers, sealants, and rust inhibitors.
Insect Repellents:

Used in the production of insect repellents.
Electronics Applications:

Widely used in electronics applications for cured epoxy resins with excellent dielectric properties and high-temperature stability.
Resistance to Yellowing:

Preferred in casting and coating applications for its higher resistance to yellowing.

Definition

ChEBI: A cyclic dicarboxylic anhydride that is the cyclic anhydride of hexahydrophthalic acid.

Flammability and Explosibility

Nonflammable

Synthesis

The predominantly cis 1,2-cyclohexanedicarboxylic anhydride is versatile, serving as a plasticizer, rust inhibitor, and curing agent for epoxy-based resins. The synthesis of Hexahydrophthalic anhydride involves reacting ciscyclohexane-1,2-dicarboxylic acid with oxalyl chloride, resulting in a crucial compound with various applications in polymerization, adhesives, and corrosion prevention.