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Specialty Compounds RTP Company

Covestro Baydur® 645 Polyurethane Structural Foam RIM, Density 20 pcf
Categories: Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane Foam, Unreinforced
Material Notes: Characterization: Baydur 645 is a rigid polyurethane structural foam system used in the reaction injection molding (RIM) process.

Properties / Applications: Baydur 645 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 645 system is used to produce foam cores for composite applications, such as water skis, agricultural and construction equipment, and various components for the transportation and marine markets. As with any product, use of the Baydur 645 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 PropertiesMetricEnglishComments
Specific Gravity  0.320 g/cc
@Thickness 6.35 mm		0.320 g/cc
@Thickness 0.250 in		ASTM D792
 0.320 g/cc
@Thickness 12.7 mm		0.320 g/cc
@Thickness 0.500 in		ASTM D792
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D  37
@Thickness 6.35 mm		37
@Thickness 0.250 in		ASTM D2240
 39
@Thickness 12.7 mm		39
@Thickness 0.500 in		ASTM D2240
Tensile Strength at Break  6.07 MPa
@Thickness 6.35 mm		880 psi
@Thickness 0.250 in		ASTM D638
 6.21 MPa
@Thickness 12.7 mm		901 psi
@Thickness 0.500 in		ASTM D638
Elongation at Break  7.0 %
@Thickness 6.35 mm		7.0 %
@Thickness 0.250 in		ASTM D638
 9.0 %
@Thickness 12.7 mm		9.0 %
@Thickness 0.500 in		ASTM D638
Flexural Strength  8.27 MPa
@Thickness 6.35 mm		1200 psi
@Thickness 0.250 in		ASTM D790
 8.96 MPa
@Thickness 12.7 mm		1300 psi
@Thickness 0.500 in		ASTM D790
Flexural Modulus  0.248 GPa
@Thickness 12.7 mm		36.0 ksi
@Thickness 0.500 in		ASTM D790
 0.303 GPa
@Thickness 6.35 mm		43.9 ksi
@Thickness 0.250 in		ASTM D790
Compressive Strength  3.79 MPa
@Thickness 12.7 mm		550 psi
@Thickness 0.500 in		ASTM D695
 6.07 MPa
@Thickness 6.35 mm		880 psi
@Thickness 0.250 in		ASTM D695
Charpy Impact Unnotched  0.525 J/cm²
@Thickness 6.35 mm		2.50 ft-lb/in²
@Thickness 0.250 in
 0.525 J/cm²
@Thickness 12.7 mm		2.50 ft-lb/in²
@Thickness 0.500 in

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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Covestro Baydur® 646 Polyurethane Structural Foam RIM, Density 20 pcf, MDI-based 2-Component Liquid System

PCOVEST0083 / 201866




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