Baydur® GS-772 Datasheet,PUR-MDI,Covestro

Message
Baydur GS-772 is a solid polyurethane system used in the reaction injection molding (RIM) process. The system is supplied as two reactive liquid components. Component A is a polymetric diphenylmethane diisocyanate (PMDI) and component B is a formulated polyol system. Baydur GS-772 system is used in applications where harsh environmental conditions are encountered, such as pump housings, catch basins, and underground equipment. It is also used as a replacement for cast iron where the application requires weight reduction, improved corrosion resistance, and/or improved abrasion resistance. As with and product, use of the Baydur GS-772 system in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability.

General Information
Features	Good corrosion resistance Good wear resistance
Uses	Pump parts
Processing Method	Injection molding

Physical	Nominal Value	Unit	Test Method
Specific Gravity
--	0.708	g/cm³	ASTM D1622
--	1.13	g/cm³	ASTM D792
Molding Shrinkage - Flow	1.0 - 1.2	%	Internal method

Hardness	Nominal Value	Unit	Test Method
Durometer Hardness (Shore D)	76		ASTM D2240

Mechanical	Nominal Value	Unit	Test Method
Tensile Strength (Break)	39.3	MPa	ASTM D638
Tensile Elongation (Break)	10	%	ASTM D638
Flexural Modulus	1380	MPa	ASTM D790
Flexural Strength	60.0	MPa	ASTM D790
Compressive Strength	34.5	MPa	ASTM D695

Films	Nominal Value	Unit	Test Method
Film Thickness - Tested	6400	µm

Impact	Nominal Value	Unit	Test Method
Notched Izod Impact	48	J/m	ASTM D256
Unnotched Izod Impact	370	J/m	ASTM D256

Thermal	Nominal Value	Unit	Test Method
Deflection Temperature Under Load (0.45 MPa, Unannealed)	98.9	°C	ASTM D648

Flammability	Nominal Value		Test Method
Flame Rating	V-0		UL 94

Thermoset	Nominal Value
Thermoset Components
Component a	Mixing ratio calculated by weight: 100, mixing ratio calculated by capacity: 86
Component B	Mixing ratio by weight: 100, mixing ratio by capacity: 100

Additional Information
Part A Type: Isocyanate Appearance: Dark brown liquid Specific Gravity @ 25°C: 1.24 Viscosity @ 25°C: 200 mPas Flash Point PMCC: 199°C NCO: 31.0 min wt% Part B Type: Polyol Appearance: Black liquid Specific Gravity @ 25°C: 1.05 Viscosity @ 25°C: 1700 mPas Flash Point PMCC: 206°C Water: 0.08 wt% Hydroxyl Number: 370 mg KOH/g Material Temperature: 32 to 38°CMold Temperature: 60 to 71°CMachine Reactive @ 35°C: 16 secTypical Cure Time: 3 to 6 minTypical Mold Density: 65 to 71 lb/ft³

Additional Information

Part A Type: Isocyanate Appearance: Dark brown liquid Specific Gravity @ 25°C: 1.24 Viscosity @ 25°C: 200 mPa*s Flash Point PMCC: 199°C NCO: 31.0 min wt% Part B Type: Polyol Appearance: Black liquid Specific Gravity @ 25°C: 1.05 Viscosity @ 25°C: 1700 mPa*s Flash Point PMCC: 206°C Water: 0.08 wt% Hydroxyl Number: 370 mg KOH/g Material Temperature: 32 to 38°CMold Temperature: 60 to 71°CMachine Reactive @ 35°C: 16 secTypical Cure Time: 3 to 6 minTypical Mold Density: 65 to 71 lb/ft³

Category:	PUR-MDI , Polyurethane (MDI)
Manufacturer:	Covestro - PUR
Trademark:	Baydur®
Fillers:	-
Ports:	Qinzhou, Shekou, Shanghai, Ningbo
Delivery Terms	FOB, CIF, DAP, DAT, DDP
PDF:	DSyynL_Baydur-GS-772.pdf
PRICE:	Order Products email sales@su-jiao.com

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