ACR impact modifiers offer excellent improvement in low-temperature impact resistance (especially below 0°C).

They have high toughening efficiency for PVC, but the toughening effect is significantly affected by the ACR dosage and the molecular weight of the PVC.

MBS impact modifiers, on the other hand, show significant impact enhancement at room temperature, but their low-temperature toughness is generally not as good as ACR. Toughening also improves processing fluidity.

Regarding weather resistance, ACR impact modifiers do not contain unsaturated double bonds (butadiene), exhibiting superior resistance to UV radiation and oxidation, making them suitable for outdoor products (such as building materials and window frames).

MBS impact modifiers, however, contain double bonds in their butadiene core, making them susceptible to UV and oxygen attack, leading to yellowing and performance degradation. They are primarily used in indoor products (such as packaging and bottle caps).

ACR impact modifiers have good compatibility with PVC and minimal impact on transparency. They are mainly used in weather-resistant transparent sheets, profiles, pipes, and other outdoor products.

MBS impact modifier balances transparency, toughness, and processability. It is widely used in food packaging films, transparent sheets, bottles, and other indoor transparent products.

In terms of cost, ACR impact modifier has a higher raw material cost, but it is irreplaceable for applications requiring weather resistance.

MBS impact modifier has a relatively lower cost and a mature production process, but its production in transparent products requires precise control to avoid yellowing or increased haze.

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