introduce the characteristics of PVC impact modifier

Second, the main performance:
1, can be used as a polymeric plasticizer , and in the long-term use will not migrate to the product surface precipitation .
2, low temperature performance blends , polarity, anti-UV, anti- chemical and microbiological corrosion magnesium hydroxide flame retardant  performance improved significantly .
3 , added to the PVC, ABS or PVC / ABS alloy to improve its thermal stability.
4 , the European regulatory approval for food contact industry .
5, in the PVC processing , Elvaloy ® 4924 can significantly improve the impact properties, including low-temperature impact resistance .
Third, the theoretical basis and the impact modifier advantage
PVC low-temperature impact strength are the main reasons is because a strong PVC molecules caused by intermolecular forces , because PVC strong molecular attraction between molecules makes PVC products subjected to external shock , PVC molecules difficult to produce the relative displacement , so that the impact energy can not be effectively converted to internal frictional heat , resulting in rupture of the material . Adding a plasticizer , CPE PVC because reducing the attraction between the molecules leaving the improved impact strength , but low molecular weight organic plasticizers are added when less easy to precipitate , and an anti- volatile plasticizing effect instead, the material becomes brittle and will greatly reduce the use of a large number of mechanical properties , it is difficult to use in hard products . The CPE of the polymer precipitated polymer although there is no problem , because its titanium dioxide  glass transition temperature above -10 ℃ , so the low temperature impact performance is not ideal. DuPont Elvaloy 4924 is an ethylene - vinyl acetate carbonyl (E / VA / CO) copolymer , molecular weight PVC rather , is a permanent plasticizer , not precipitated , anti-migration , can significantly reduce the intermolecular force PVC , the glass transition temperature - 36 ℃, to overcome the low glass transition temperature and the CPE plasticizers easy to produce anti- plasticization defects. Not only can greatly improve the impact properties of rigid PVC and can effectively improve the weathering resistance.
Fourth, technical indicators:
Melt index (g/10min) 9
Density (g/cm3) 1.03
Tensile Strength (Psi) 1580
Elongation at break ( % ) 736
Glass transition temperature (℃) -36
Melting point (℃) 70
Solubility parameter 8.68
Five , the main application
1 , rigid PVC: improved formability , reduce subsequent vacuum forming temperature , forming speed faster , improve impact resistance ;
2, soft PVC: to increase weather resistance , low  PVC profile stabilizer temperature resistance , chemical resistance and no -shift problems and improve impact resistance
3 , Footwear: with rubber handle, can increase wear and slip effect , against the soapy water and oil also increased many aspects of behavior .
4 , Other : PVC cable , PVC film, PVC leather and PVC and rubber blend products.