POLYPROPYLENE COMPOSITION HAVING HIGH RIGIDITY AND IMPACT VISCOSITY Russian patent published in 2012 - IPC C08F10/06 C08K3/00 

FIELD: chemistry.

SUBSTANCE: composition contains a propylene homo- or copolymer (A) with polydispersity index (PI) determined according to standard ISO 6721-1 equal to at least 5.8 Pa^-1, and inorganic filler (B) in amount of 4.0-18.0 pts.wt per 100 pts.wt (A)+(B). The relationship (80F+1700)MPa≤T must be satisfied, where F denotes pts.wt of component (B) per 100 pts.wt (A)+(B), T denotes modulus of elasticity in tension in MPa, determined according to ISO 527-2, of the propylene composition measured on a test sample obtained by pressure moulding according to standard ISO 1873-2.

EFFECT: polymer has good surface properties and good scratch resistance.

11 cl, 5 dwg, 3 tbl, 7 ex