Durastrength® 4000 is an advanced acrylic impact modifier that enhances the impact properties of rigid PVC products while providing exceptional processability. It can replace CPE impact modifiers, maintaining the processing advantages of traditional acrylic modifiers. This powder offers low melt viscosity and is ideal for applications such as decking, window profiles, siding, and fencing. It is listed in the TSCA (USA) and DSL (Canada) chemical inventories.

Chemical Family: Acrylics & Acrylates

End Uses: Decking, Fencing, Siding Applications, Window Profiles

Enhanced TDS

Identification & Functionality

Features & Benefits

Materials Features
Product Benefits

1. Excellent impact resistance that is equivalent to or better than alternative non-acrylic impact modifiers.

Typical Impact Resistance [Izod Impact Performance (Siding Substrate Formulation @ 4.5phr Modifier)]

2. Faster fusion than alternative non-acrylic impact modifiers without the need for additional processing aids.

Typical Torque Rheometer Fusion

Torque Rheometer Curves Settings: 175°C, 75 RPM and 100 cc sample size Impact modifiers evaluated at 4.5 phr

3. Substrate applications utilizing Durastrength® 4000 impact modifier maintain important mechanical properties for final PVC product performance.

Typical Mechanical Property Performance (Tensile Evaluation)

Evaluation followed ASTM D-638 Impact modifiers tested at 4.5 phr

4. Durastrength® 4000 impact modifier has traditional acrylic characteristics such as a low melt viscosity which when employed in a vinyl formulation results in good stability, smooth processing, and high output rates.

 

Applications & Uses

Plastics & Elastomers End Uses
Suggested Use Levels

Durastrength® 4000 impact modifier is recommended for applications requiring impact properties in addition to ease of processing such as siding, fence and deck substrate. As with all impact modifiers for PVC, proper formulation is required to develop the necessary shear and mixing during extrusion so that impact properties are optimized.
Prospective clients should evaluate Durastrength® 4000 impact modifier in their own laboratories to establish optimum conditions for use in their processes and applications. Arkema’s Technical Service Team is available to discuss your application requirements, provide formulation guidance, and laboratory testing as needed.

Typical Starting Formulation Recommendations
Rigid Siding SubstrateUse Level (phr)
PVC Resin |K-65 to K-67)100
Butyl Organolin Stabilizer0.8 - 1.2
Calcium Stearatel1.0 - 1.5
Paraffin Wax (165 m.p.)1.0 - 1.5
Oxidized Polyethylene Wax0.1 - 0.2
Durastrength® 4000 Impact Modifier4.0 - 5.0
Calcium Carbonate (0.7 um)10.0 - 20.0
Titanium Dioxide

0.5 - 1.5

 

Ribbed PipeUse Level (phr)
PVC Resin |K-65 to K-67)100
Buryl Organotin Stabilizer0.6 - 0.8
Calcium Stearate0.6 - 0.8
Paraffin Wax (165 m.p.)10-1.2
Oxidized Polyethylene Wax0.1 - 0.2
Durastrength® 4000 Impoct Modifier3.5 - 4.5
Plastistrongth® Procoss Aid0.0 - 0.6
Calcium Carbonate (0.7 um] |4.0 - 6.0
Titanium Dioxide1.0 - 2.0

 

Properties

Physical Form
Appearance
White powder
Physical Properties
ValueUnitsTest Method / Conditions
Particle Size on 50 Meshmax. 15%-
Percent Volatilemax. 1.2%-
Particle Sizemax. 15%-
Bulk Density0.55g/cc-
Specific Gravity1.47--
SDS Physical and Chemical Properties
ValueUnitsTest Method / Conditions
Insoluble InWater--
Note

*The mechanical property and rheology property data listed are considered to be typical properties, not specifications.

Regulatory & Compliance

Chemical Inventories

Packaging & Availability

Packaging Information

Durastrength® 4000 impact modifier is packaged in 25 kg bags and 1800 lb. bulk bags.