Acrylate Series Impact Modifier
Acrylate Series Impact Modifier is a high polymer with typical core-shell structure, its core is a slightly crosslinked acrylate copolymer with low glass transition temperature, and its shell is a methacrylate copolymer, which has good compatibility with PVC.
Product Description
| Index | Unit | SG-45 | SG-50 | SG-55 |
| Bulk density | g/cm³ | 0.45±0.10 | 0.45±0.10 | 0.45±0.10 |
| Sieve residue (30 mesh ) | % | ≤2.0 | ≤2.0 | ≤2.0 |
| Volatile Content | % | ≤1.0 | ≤1.0 | ≤1.0 |
| Application | / | Window profiles, pipes and fittings etc. | Transparent PVC products. | Economic grade |
Rigid PVC provides good strength and dimensional stability, but its impact resistance may be insufficient for applications exposed to mechanical impact, installation stress or low-temperature conditions.
Adding an appropriate acrylic impact modifier can help:
● Improve impact strength and toughness
● Reduce brittle cracking of rigid PVC products
● Maintain better impact performance in demanding applications
● Improve surface quality of extruded PVC products
● Support stable extrusion and processing
● Provide good weatherability for suitable outdoor PVC applications
● Improve the performance balance between rigidity and toughness
Acrylic impact modifiers are particularly suitable for rigid PVC applications where both impact resistance and long-term outdoor durability are important.
PVC window and door profiles require sufficient toughness to resist impact during fabrication, transportation, installation and long-term use.
SG-45 is designed for applications such as window profiles and other rigid PVC extruded products. An acrylic impact modifier can help improve impact resistance while maintaining the surface quality and dimensional performance required by profile manufacturers.
Rigid PVC pipes and fittings may experience impact during production, transportation, installation and service.
A suitable PVC acrylic impact modifier improves toughness and helps reduce the risk of brittle cracking, especially where the formulation requires a balance between rigidity, processing stability and impact strength.
SG-50 is intended for transparent PVC applications.
For transparent formulations, the impact modifier must be selected not only according to impact strength but also according to optical requirements such as transparency and haze. Customers should evaluate the complete formulation through production trials before determining the final dosage.
SG-55 is positioned as an economic-grade acrylic impact modifier for customers seeking a balance between modification performance and formulation cost.
The actual suitability should be confirmed according to the required impact standard and finished-product performance.
One important advantage of acrylic impact modifiers is their suitability for weather-resistant PVC products.
All-acrylic impact modifiers are commonly selected for outdoor applications such as window profiles, siding, pipes and other durable rigid PVC products because they can combine impact modification with strong weatherability.
This makes acrylic impact modifiers particularly relevant when finished products will experience long-term sunlight, temperature changes and outdoor exposure.
Although both products can be acrylic-based additives, an acrylic impact modifier and an acrylic processing aid are not the same product.
| Function | Acrylic Impact Modifier | Acrylic Processing Aid |
|---|---|---|
| Primary Purpose | Improve PVC impact resistance | Improve fusion and processing |
| Main Benefit | Toughness and impact strength | Melt homogeneity and processing behavior |
| Common Applications | Profiles, pipes, fittings, sheets | Most rigid and foamed PVC formulations |
| Selection Focus | Impact and weatherability requirements | Fusion, melt strength and extrusion behavior |
Some acrylic impact modifiers may also influence processing behavior, but they should primarily be selected according to the impact-performance requirements of the finished PVC product.
PVC manufacturers commonly compare acrylic modifiers with CPE and MBS when selecting an impact-modification system.
Best suited to applications where impact strength and outdoor weatherability are both important, such as window profiles and other exterior PVC products.
Frequently considered for transparent or indoor applications where clarity and impact efficiency are major requirements.
Widely used in rigid PVC products such as pipes and profiles where economical impact modification is required.
There is no universal replacement ratio between these materials. Selection should be based on the complete PVC formulation, processing conditions, required impact strength, weather exposure and cost target.
An acrylic impact modifier is a polymer additive used to increase the toughness and impact resistance of plastics such as rigid PVC. Core-shell acrylic structures are commonly used because the elastomeric core absorbs impact energy while the outer layer provides compatibility with PVC.
ACR is frequently used as a broad industry abbreviation for acrylic additives, so it can refer to different products. Acrylic impact modifiers and acrylic processing aids have different primary functions and should be identified separately when purchasing.
Shitong SG-45 is recommended for PVC window profiles, pipes and fittings. Final selection should still be confirmed according to your formulation and required impact strength.
Yes. SG-50 is designed for transparent PVC products. Customers should test transparency, haze and impact performance in their complete formulation before commercial production.
Acrylic impact modifiers are commonly used for weatherable rigid PVC applications such as outdoor profiles, pipes and building products. The exact grade should be selected according to the required weathering and impact specifications.
The appropriate dosage depends on PVC resin, filler content, stabilizer system, required impact performance and processing conditions. Instead of using one universal dosage, Shitong recommends evaluating the modifier in the customer's actual formulation.
Shitong supplies Acrylic Impact Modifiers for PVC manufacturers, including SG-45 for profiles, pipes and fittings, SG-50 for transparent PVC products and SG-55 for economical formulations.
Send us your PVC product type, current formulation, existing impact modifier and target impact performance. We can recommend a suitable acrylic impact modifier for production testing.
Contact Shitong for specifications, samples and product recommendations.
