FIELD: chemistry.
SUBSTANCE: composition contains a mixture of 2-15 wt % propylene-ethylene copolymer having essentially isotactic propylene sequences (A), 85-98 wt % random polypropylene copolymer (B) and 500-2500 ppm by weight of an additive of nucleating agent/clarifying agent (with respect to weight of the random polypropylene copolymer) (C). The propylene-ethylene copolymer, having essentially isotactic propylene sequences (A), contains at least 75 wt % units obtained from propylene, and 11-18 wt % units obtained from ethylene, and has melt flow rate of 4-30 g/10 min. The melt flow rate of the compositions ranges from 20 to 125 g/10 min.
EFFECT: articles made by pressure casting using the disclosed composition demonstrate excellent balance of rigidity, hardness and optical properties such as high transparency or low turbidity, good resistance to whitening under load.
10 cl, 8 dwg, 2 tbl, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| BUFFER TUBES FOR FIBRE-OPTIC CABLES | 2016 |
|
RU2717347C1 |
| MIXTURE OF STYRENE BLOCK-COPOLYMERS AND PROPYLENE-ALPHA-OLEFIN COPOLYMERS | 2006 |
|
RU2426753C2 |
| POLYETHYLENE COMPOSITIONS, PRODUCTION METHODS THEREOF AND ARTICLES MADE THEREFROM | 2007 |
|
RU2457224C2 |
| LAYERS OF NONWOVEN MATERIAL MADE BY BLOWING PROPYLENE-BASED POLYMER MELT, AND COMPOSITE STRUCTURES | 2006 |
|
RU2415206C2 |
| POLYMERIC MIXTURES FROM ETHYLENE/α-OLEFIN INTERPOLYMERS HAVING IMPROVED COMPATIBILITY | 2006 |
|
RU2408622C2 |
| SHOCK PROOF POLY-OLEFINE COMPOSITIONS | 2006 |
|
RU2418015C2 |
| OPTICAL FIBRE CABLE COMPONENTS | 2014 |
|
RU2675843C1 |
| ETHYLENE/α-OLEFIN BLOCK-INTERPOLYMERS | 2006 |
|
RU2409595C2 |
| WATER DISPERSIONS APPLIED ON GLASS-CONTAINING FIBRES AND GLASS-CONTAINING SUBSTRATES | 2007 |
|
RU2415010C2 |
| FILMS BASED ON CROSS-LINKED POLYMERS AND ARTICLES MADE THEREFROM | 2009 |
|
RU2520209C2 |
