| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: composition of mother mixture has value of characteristic viscosity [eta] of fraction, soluble in xilol at room temperature, equal or higher than 3,5 dl/g and contains 50-90 wt % of crystalline polypropylene and 10-50 wt % of ethylene copolymer and, at least, one C3-C10 alpha-olefin, which contains from 15 to 50 % of ethylene. Crystalline polypropylene contains two fractions with melt flow rate at 230C and loading 2.16 kg from 0.1 to 10 g/10min (MFRI) and from 10 to 68 g/min (MFRII), respectively. Ratio MFRI/MFRII is from 5 to 60. ^ EFFECT: obtaining end polyolefin composition, ready for manufacturing by casting under pressure of large products, which have excellent surface appearance due to reduction of tiger stripes and absence of gels. ^ 7 cl, 2 tbl, 5 ex |
