Covestro Baydur® PUL 2500 Liquid Polyurethane

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Covestro Baydur® PUL 2500 Liquid Polyurethane
Categories:	Fluid
Material Notes:	Characterization: Baydur PUL 2500 is a two-component liquid polyurethane system for use in composite manufacturing. Properties / Applications: Baydur PUL 2500 is a two-component liquid polyurethane system for use in composite manufacturing. The isocyanate is a modified diphenylmethane diisocyanate (MDI), and the polyol component is a polyether polyol blend. The system has been specially designed for use in pultrusion and gives excellent composite properties, including superior elongation to failure, shear strength and impact resistance. As with any product, use of the Baydur PUL 2500 system in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability. Information provided by Covestro
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Physical Properties	Original Value	Comments

Specific Gravity	1.07 g/cc	Polyol (Component B)
	1.24 g/cc	Isocyanate (Component A)
	2.10 g/cc	ASTM D792
Viscosity	200 cP	Isocyanate (Component A)
	750 cP	Polyol (Component B)

Mechanical Properties	Original Value	Comments
Flexural Strength	1380 MPa	ASTM D790
Flexural Modulus	48300 MPa	ASTM D790
Flexural Strain at Yield	3.0 %	ASTM D790
Shear Strength	>= 9.00 ksi	Short beam; ASTM D2344

Thermal Properties	Original Value	Comments
Flash Point	199 °C	Isocyanate (Component A)
	>= 200 °C	Polyol (Component B)

Descriptive Properties
Appearance	Dark brown liquid	Isocyanate (Component A)
	Milky liquid	Polyol (Component B)
Content	>31%	NCO, Isocyanate (Component A)
Hydroxyl number	[mg KOH/g], Polyol (Component B)

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PCOVEST0099 / 201882

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