Baydur® GS-772

About
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.&&

Product Description
SupplierCovestro
GenericPUR+MDI
Material StatusCommercial: Active
FeaturesCorrosion Resistant,Good wear resistance,V-0
AvailabilitysAfrica & Middle East ,North America,Latin America,Asia Pacific,Europe
Process MethodsInjection Molding

Technical Data
PHYSICALNominal valueUnitTest method
Density 
0.708g/cm³ASTM D1622
1.13g/cm³ASTM D792
Shrinkage rate
MD1.0 to 1.2%Internal Method

filmNominal valueUnitTest method
film thickness
test6400µm

IMPACTNominal valueUnitTest method
Impact strength of cantilever beam notch48J/mASTM D256
Notched impact strength of cantilever beam370J/mASTM D256

FLAME CHARACTERISTICSNominal valueUnitTest method
Flame retardant levelV-0 UL 94

MECHANICALNominal valueUnitTest method
Shore hardness
Shaw’s D76 ASTM D2240
tensile strength
fracture39.3MPaASTM D638
Tensile strain
fracture10%ASTM D638
Bending modulus1380MPaASTM D790
bending strength60.0MPaASTM D790
compressive strength34.5MPaASTM D695

THERMALNominal valueUnitTest method
Hot deformation temperature
0.45 MPa, unannealed98.9ASTM D648
Thermosetting components 
Component A按重量计算的混合比: 100, 按容量计算的混合比: 86 
Component B按重量计算的混合比: 100, 按容量计算的混合比: 100 

Notes
1. Typical properties: these are not to be construed as specifications.
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