Covestro Baydur® 684 Polyurethane Structural Foam RIM, Density 25 pcf

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Covestro Baydur® 684 Polyurethane Structural Foam RIM, Density 25 pcf
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane Foam, Unreinforced
Material Notes:	Characterization: Baydur 684 is a rigid polyurethane structural foam system used in the reaction injection molding (RIM) process. Properties / Applications: Baydur 684 is a rigid polyurethane structural foam system used in the reaction injection molding (RIM) process. The system is supplied as two reactive liquid components. Component A is a polymeric diphenylmethane diisocyanate (PMDI), and Component B is a formulated polyol system containing no CFC- or HCFC-blowing additives. The Baydur 684 system is used for applications requiring high compression strength foams, filling cavities and/or producing foam cores for overmolding. As with any product, use of the Baydur 684 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	1.08 g/cc	Polyol
	1.24 g/cc	Isocyanate
Viscosity	200 cP	Isocyanate
	900 cP	Polyol

Mechanical Properties	Original Value	Comments
Hardness, Shore D	50 @Thickness 12.7 mm	ASTM D2240
Tensile Strength at Break	11.0 MPa @Thickness 12.7 mm	ASTM D638
Flexural Strength	13.3 MPa @Thickness 12.7 mm	ASTM D790
Flexural Modulus	434 MPa @Thickness 12.7 mm	ASTM D790
Compressive Strength	10.7 MPa @Thickness 12.7 mm	ASTM D2240

Processing Properties	Original Value	Comments
Gel Time	<= 0.917 min

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PCOVEST0089 / 201872

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