Evonik DYNACOLL® 7331 Copolyester

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Evonik DYNACOLL® 7331 Copolyester
Categories:	Polymer; Thermoset; Polyester, TS
Material Notes:	DYNACOLL® 7000 products are linear copolyesters with primary hydroxyl functionality and medium molecular weight. Our DYNACOLL® 7000 product line is designed as a building block system, allowing the tailormade production of reactive hot melts (RHM). The 7300 series is a crystalline
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Physical Properties	Metric	English	Comments

Density	1.19 g/cc @Temperature 23.0 °C	0.0430 lb/in³ @Temperature 73.4 °F
Viscosity	2000 cP @Temperature 130 °C	2000 cP @Temperature 266 °F
Molecular Weight	3500 g/mol	3500 g/mol

Chemical Properties	Metric	English	Comments
Total Acid Number	<= 2.0	<= 2.0	[mg KOH/g]

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	30.0 MPa	4350 psi	with MDI; OH:NCO=1:2.16
Elongation at Break	500 %	500 %	with MDI; OH:NCO=1:2.16

Thermal Properties	Metric	English	Comments
Melting Point	110 °C	230 °F
Softening Point	115 °C	239 °F
Glass Transition Temp, Tg	-30.0 °C	-22.0 °F
Flash Point	>= 300 °C	>= 572 °F

Descriptive Properties
Hydroxyl Number (mg KOH/g)	27-34

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PHUMB221 / 81223

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