NUCLEATING AGENTS FOR POLYPROPYLENE AND PROPYLENE COPOLYMERS

摘要

Use of a compound or a combination of compounds for crystallization of polypropylene or polypropylene copolymers, characterized in that each of said compounds comprises a core motif with two oxalamide motifs, flanked by two arms, wherein said core motif has the formula: R-NH-C(O)-C(O)-NH-(CH₂)_n-NH-C(O)-C(O)-NH-R', wherein n is between 1 and 10 and the arms R and R' are each independently of one another chosen from: (i) H; (ii) an alkyl group with a total number of carbon atoms between 1 and 20; or (iii) an ester group as e.g. - X-Ester-Y, or - X-Ester- X-Ester-Y, wherein X is a saturated aliphatic hydrocarbon group comprising 1 to 20 carbon atoms, Y is chosen from H or an aliphatic alkyl group with a total number of carbon atoms between 1 and 20 Ester is –C(O)-O- or –O-C(O)-.