About |
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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 | |
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Supplier | Covestro |
Generic | PUR+MDI |
Material Status | Commercial: Active |
Features | Corrosion Resistant,Good wear resistance,V-0 |
Availabilitys | Africa & Middle East ,North America,Latin America,Asia Pacific,Europe |
Process Methods | Injection Molding |
Technical Data | |||
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PHYSICAL | Nominal value | Unit | Test method |
Density | |||
— | 0.708 | g/cm³ | ASTM D1622 |
— | 1.13 | g/cm³ | ASTM D792 |
Shrinkage rate | |||
MD | 1.0 to 1.2 | % | Internal Method |
film | Nominal value | Unit | Test method |
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film thickness | |||
test | 6400 | µm |
IMPACT | Nominal value | Unit | Test method |
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Impact strength of cantilever beam notch | 48 | J/m | ASTM D256 |
Notched impact strength of cantilever beam | 370 | J/m | ASTM D256 |
FLAME CHARACTERISTICS | Nominal value | Unit | Test method |
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Flame retardant level | V-0 | UL 94 |
MECHANICAL | Nominal value | Unit | Test method |
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Shore hardness | |||
Shaw’s D | 76 | ASTM D2240 | |
tensile strength | |||
fracture | 39.3 | MPa | ASTM D638 |
Tensile strain | |||
fracture | 10 | % | ASTM D638 |
Bending modulus | 1380 | MPa | ASTM D790 |
bending strength | 60.0 | MPa | ASTM D790 |
compressive strength | 34.5 | MPa | ASTM D695 |
THERMAL | Nominal value | Unit | Test method |
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Hot deformation temperature | |||
0.45 MPa, unannealed | 98.9 | ℃ | ASTM 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 |
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1. Typical properties: these are not to be construed as specifications. |
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