The most practical PVC Impact Modifier

The most practical PVC Impact Modifiers are as follows:

(1) Chlorinated Polyethylene (CPE): A powdery product that uses HDPE to suspend chlorination in the water phase. CPE is a type of superior high performance-price ratio impact modifier and is widely used in production of many types of rigid plastic products (like rigid plastic profiles, pipes, pipe fittings and sheets) and semi-flexible sidings. CPE greatly improves impact resistance, low temperature performances, weatherability, and welding strength of the final products.

(2) Acrylic Impact Modifier (ACR): It is the best Impact Modifier developed in recent years, which can increase the impact strength of materials dozens of times. It is suitable for impact modification of PVC plastic products used outdoors. It is used in PVC plastic door and window profiles. It improves impact resistance performance, increases the surfact gloss, especially the weatherability of the product. It is especially suitable for outdoor products and broadly used in PVC profiles, window profile, siding, sheets, boards, pipes, pipe fittings, etc.

(3) MBS Impact Modifier: The solubility parameter is between 9.4 and 9.5, which is close to that of PVC, so it has better compatibility with PVC. After adding PVC, it can be made into a transparent product. Generally, adding 10-17 parts to PVC can increase the impact strength of PVC by 6-15 times, but when the amount of MBS added is 30 parts larger, the impact strength of PVC will decrease instead. The price of MBS is relatively high, and it is often used together with other additives such as EAV, CPE, and SBS. MBS has poor heat resistance and poor weather resistance, so it is not suitable for long-term outdoor use, and generally does not need to be used as plastic door and window profiles.

(4) CRA Impact Modifier: Compared with acrylic impact modifier and CPE impact modifier, CRA impact modifier has faster fusion and higher elongation at break. It can endow PVC products with better toughness than other PVC impact modifiers especially at low temperature. It can replace Acrylice Impact Modifier, Acrylic Processing Aids and CPE in the PVC formulation with better cost performance.

(5) ABS Impact Modifier: It is mainly used as engineering plastics, and also used as PVC impact modification, and the effect of low temperature impact modification is also very good. When the amount of ABS added reaches 50 parts, the impact strength of PVC can be equivalent to that of pure ABS. The amount of ABS added is generally 5-20 parts. ABS has poor weather resistance and is not suitable for long-term outdoor use products. Generally, it is not used as an impact modifier for the production of plastic door and window profiles.

(5) EVA: Moreover, the refractive index of EVA and PVC is different, and it is difficult to obtain transparent products. EVA is often used together with other impact-resistant resins. The amount of EVA added is less than 10 parts