Baydur® 641 IBS (30 pcf) Datasheet,PUR-MDI,Covestro

Message
Baydur 641 IBS is a rigid polyurethane structural foam system used in the reaction injection molding (RIM) process. This system is supplied as two reactive liquid components and is typically used with a blowing paste purchased separately. Component A is a polymeric diphenylmethane diisocyanate (PMDI). Component B is a formulated polyol system containing no CFC- or HCFC-blowing additives. The blowing paste is Baydur PU-1731. The Baydur 641 IBS system is used in the industrial and medical equipment markets for applications requiring dimensional stability and excellent surface finish, such as, rollers for photographic and X-ray film processing equipment. As with any product, use of Baydur 641 IBS system in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability.

General Information
Features	Good dimensional stability Excellent appearance
Uses	Structural Foam Industrial application Medical/nursing supplies
Processing Method	Reaction Injection Molding (RIM)

Physical	Nominal Value	Unit	Test Method
Specific Gravity	0.479	g/cm³	ASTM D792
Molding Shrinkage - Flow (12.7 mm)	0.30 - 0.50	%	ASTM D955

Hardness	Nominal Value	Unit	Test Method
Durometer Hardness (Shore D, 12.7 mm)	61		ASTM D2240

Mechanical	Nominal Value	Unit	Test Method
Tensile Strength (Break, 12.7 mm)	9.65	MPa	ASTM D638
Tensile Elongation (Break, 12.7 mm)	8.0	%	ASTM D638
Flexural Modulus (12.7 mm)	483	MPa	ASTM D790
Flexural Strength (12.7 mm)	20.0	MPa	ASTM D790
Compressive Strength (12.7 mm)	8.96	MPa	ASTM D695

Impact	Nominal Value	Unit	Test Method
Charpy Unnotched Impact Strength ¹	9.0	kJ/m²	Internal method

Thermal	Nominal Value	Unit	Test Method
Deflection Temperature Under Load (0.45 MPa, unannealed, 12.7mm)	70.0	°C	ASTM D648

Thermoset	Nominal Value
Thermoset Components
Component a	Mixing ratio by weight: 110
Component B	Mixing ratio by weight: 100

Additional Information
Part A Type: Isocyanate Appearance: Dark brown liquid Specific Gravity @ 25°C: 1.24 Viscosity @25°C: 200 cps Flash Point PMCC: 199°C NCO: 31.5 wt% Part B Type: Polyol Appearance: Pale yellow liquid Specific Gravity @ 25°C: 1.02 Viscosity @25°C: 2000 cps Flash Point PMCC: 187°C Water: 0.45 wt% Hydroxyl Number: 367 KOH/g Material Temperatures: 27 to 35°CMold Temperature: 60 to 70°CHand Mix Reactivity at 25°C Cream Time: 8 to 13 sec Gel Time: 15 to 25 sec Tack Free Time: 23 to 28 sec Free-Rise Density: 7.5 to 10 lb/ft³ Polyol Nucleation Specific Gravity: 0.85 to 0.90 0Typical cure Time, 0.500 in Thickness: 4 sec

Additional Information

Part A Type: Isocyanate Appearance: Dark brown liquid Specific Gravity @ 25°C: 1.24 Viscosity @25°C: 200 cps Flash Point PMCC: 199°C NCO: 31.5 wt% Part B Type: Polyol Appearance: Pale yellow liquid Specific Gravity @ 25°C: 1.02 Viscosity @25°C: 2000 cps Flash Point PMCC: 187°C Water: 0.45 wt% Hydroxyl Number: 367 KOH/g Material Temperatures: 27 to 35°CMold Temperature: 60 to 70°CHand Mix Reactivity at 25°C Cream Time: 8 to 13 sec Gel Time: 15 to 25 sec Tack Free Time: 23 to 28 sec Free-Rise Density: 7.5 to 10 lb/ft³ Polyol Nucleation Specific Gravity: 0.85 to 0.90 0Typical cure Time, 0.500 in Thickness: 4 sec

Note Message
1 .	0.5 in

Category:	PUR-MDI , Polyurethane (MDI)
Manufacturer:	Covestro - PUR
Trademark:	Baydur®
Fillers:	-
Ports:	Qinzhou, Shekou, Shanghai, Ningbo
Delivery Terms	FOB, CIF, DAP, DAT, DDP
PDF:	OpYZGg_Baydur-641-IBS-30-pcf-.pdf
PRICE:	Order Products email sales@su-jiao.com

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