Beta-modification of isotactic polypropylene

1 7-Quinacridone High activity (A =0.8-O.9) Physical or chemical instability, intense red color Leugering, 1967 German Patent (DAS) 1188278 

2 Aluminium salt of quinizarin sulphonic acid — — Binsbergen, de Lange, 1968 

4 Calcium-phtalat High thermal stability Moderate activity (Jt=0.5-0.7) Hughes, 1970 US Patent 3540979 

5 Dihydroquinoacridin-dione and quinacridin-tetrone — Moderate activity 0=65%), colored W. Kathan, 1986 German Patent 3443599 

7 Two-component nucleator (CaC03+organic acids) Ca stearat+pimelic acid High activity (fc=0.8-0.93) Free stearic acid Shi et al., 1987 

---

Varga, J. (2002). Beta-modification of isotactic polypropylene Preparation, structure, processing, properties, and apvplication.. Macromol Sci, Phys. B., Vol. B41, Issue 4-6, pp.1121-1171. 

Varga J and Ehrenstein G W (1999) Beta-modification of isotactic polypropylene, in Polypropylene An A-Z Reference (Ed. Karger-Kocsis J) Kluwer, Dordrecht, Netherlands, pp. 51-59. 

---