eFunda Polymers: Properties of Polyester / alkyd, thermoset {alkyd, mineral filled, molding compounds, granular and putty}
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Polyester / alkyd, thermoset		  
List of Suppliers
State: alkyd
Additives: mineral filled
Application: molding compounds, granular and putty
Material Properties
 Mechanical Properties Conditions
State 1 State 2 ASTM
Elastic Modulus (MPa)   3450 - 20700  tensile   D638
 13800 - 20700  compressive   D638
Flexural Modulus (MPa)  13800   23 ºC   D790
Tensile Strength (MPa)   21 - 63 at break   D638
Compressive Strength (MPa)
at yield or break		   83 - 263     D695
Flexural Strength (MPa)
at yield or break		   42 - 118     D790
Hardness   98  Rockwell E   D638
Izod Impact (J/cm of notch)
1/8" thick specimen unless noted		   0.2 - 0.3     D256A

 Thermal Properties Conditions
Pressure State ASTM
Coef of Thermal Expansion (10-6/ºC)   20 - 50     D696
Deflection Temperature (ºC)  177 - 260   1.82 MPa   D648
Thermal Conductivity (W/m-ºC)  0.502 - 1.045     C177

 Physical & Electrical Properties Conditions
State ASTM
Specific Gravity  1.6 - 2.3   D792
Water Absorption (% weight increase)  0.05 - 0.5  after 24 hrs D570
Dielectric Strength (V/mil);
1/8" thick specimen unless noted		   350 - 450   D149

 Processing Properties Conditions
Type ASTM
Melting Temperature (ºC)  thermoset  Tm, crystalline  
Processing Temperature (ºC)  160 - 183  transfer molding  
 133 - 177  compression molding  
 138 - 199  injection molding  
 160 - 183  transfer molding  
Molding Pressure (MPa)   14 - 138    
Compression Ratio  1.8 - 2.5    
Linear Mold Shrinkage (cm/cm)  0.003 - 0.01   D955

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Suppliers
Cytec Fiberite, Inc. Tempe, AZ   
Plastics Engineering, Inc. Auburn Hills, MI   
Premix, Inc. North Kingsville, OH   

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