Covestro Baydur® STR/C 1000 Liquid Structural RIM

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Covestro Baydur® STR/C 1000 Liquid Structural RIM
Categories:	Fluid
Material Notes:	Characterization: Baydur STR/C-1000 is a moderate-viscosity, two-component, liquid structural RIM (reaction injection molding) system. Properties / Applications: Baydur STR/C-1000 is moderate-viscosity, two-component, liquid structural RIM (reaction injection molding) system. Component A is a modified polymeric diphenylmethane diisocyanate (PMDI) blend,and Component B is a totally formulated polyol blend. The Baydur STR/C-1000 system is used in the production of structural composite parts with long-fiber reinforcements. The reinforcement is placed in the mold, which is closed and then injected with the reactive resin. Baydur STR composites can be ten times stiffer than Baydur structural foams and have the excellent impact properties traditionally associated with Bayer polyurethanes. As with any product, use of the Baydur STR/C-1000 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	1.04 g/cc	Polyol (Component B)
	1.19 g/cc	ASTM D1622
	1.24 g/cc	Isocyanate (Component A)
Viscosity	320 cP	Isocyanate (Component A)
	700 cP	Polyol (Component B)

Mechanical Properties	Original Value	Comments
Tensile Strength at Break	73.8 MPa	ASTM D638
Elongation at Break	14 %	ASTM D638
Flexural Strength	139 MPa	ASTM D790
Flexural Modulus	3520 MPa	ASTM D790
Izod Impact, Notched	1.40 ft-lb/in	ASTM D256

Thermal Properties	Original Value	Comments
Flash Point	143 °C	Polyol (Component B)
	213 °C	Isocyanate (Component A)

Processing Properties	Original Value	Comments
Mold Temperature	79.0 - 88.0 °C
Gel Time	0.600 min

Descriptive Properties
Appearance	Clear to straw yellow liquid	Polyol (Component B)
	Dark brown liquid	Isocyanate (Component A)
Content	27.3%	NCO, Isocyanate (Component A)
Hydroxyl number	[mg KOH/g], Polyol (Component B)

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PCOVEST0103 / 201886

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