Milliken® Milldride® HHPA Hexahydrophthalic Anhydride

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Milliken® Milldride® HHPA Hexahydrophthalic Anhydride
Categories:	Other Engineering Material
Material Notes:	Description: Hexahydrophthalic Anhydride (HHPA) is a saturated dicarboxylic anhydride and will undergo most of the reactions typical of this class of compounds. It is supplied as a white low-melting solid (38°C) which is miscible with most organic solvents. In water, it hydrolyzes to hexahydrophthalic acid. Application Information: Milldride HHPA is a very effective curing agent for epoxy resins. It is also used in the preparation of alkyd and polyester resins where good color stability is important. HHPA cured epoxies are characterized by reduced color and improved electrical and physical properties as compared to amine-cured products. The low melting point of HHPA allows it to be easily handled and blended with liquid resins. Viscosities of the HHPA-epoxy mixtures are lower, pot life is extended in the absence of catalyst and curing reaction is less exothermic than with other hardeners. Areas of application including casting, laminating, embedding, coating, and impregnating electrical components. Chemical Formula: C₈H₁₀O₃ CAS No: 80-04-6 Information provided by Milliken®
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Physical Properties	Original Value	Comments

Specific Gravity	1.18 g/cc @Temperature 40.0 °C	Melted
Viscosity	23 cP @Temperature 60.0 °C
Molecular Weight	154 g/mol

Mechanical Properties	Original Value	Comments
Tensile Strength at Break	37.2 MPa	Cure: 24hr-150°C
	63.4 MPa	Cure: 200hr-150°C
	77.9 MPa	Cure: 4hr-150°C
Flexural Strength	46.9 MPa	Cure: 24hr-150°C
	121 MPa	Cure: 4hr-150°C
	167 MPa	Cure: 200hr-150°C
Compressive Strength	5.60 ksi	Cure: 24hr-150°C
	22.8 ksi	Cure: 200hr-150°C
	25.6 ksi	Cure: 4hr-150°C

Electrical Properties	Original Value	Comments
Dielectric Constant	3.6	Cure: 200hr-150°C
	4.4	Cure: 4hr-150°C
	10 @Temperature 175 °C	Cure: 24hr-150°C

Thermal Properties	Original Value	Comments
Solidus	35.0 °C

Processing Properties	Original Value	Comments
Pot Life	13.0 min	Cure: 24hr-150°C
	150 - 210 min	Cure: 200hr-150°C
	5760 - 7200 min	Cure: 4hr-150°C

Descriptive Properties
Color	25	Molten APHA
Content	<0.2%	Maleic Anhydride
	0.2%	Hexahydrophthalic Acid
Neutralization Value	710-730

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PMILLIK027 / 194998

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