RU2002105010A - COMPOSITIONS BASED ON PROPYLENE POLYMER POSSESSING IMPROVED IMPACT RESISTANCE AND EXCELLENT OPTICAL PROPERTIES - Google Patents

Claims (6)

1. Compositions based on a propylene polymer, including, wt.%: A) 70 - 90% of a static copolymer of propylene with ethylene containing 1 to 6% ethylene and having a fraction insoluble in xylene at room temperature (about 23 ° C) of at least 93%; B) 10-30% of a copolymer of propylene with ethylene containing 8-18% of ethylene, where the ratio (B) / C $\genfrac{}{}{0ex}{}{\text{2}}{\text{in}}$ percentage containing by weight (B) based on the total mass content of (A) and (B), to the mass percentage of ethylene in (B), based on the total mass content (B), represented in the above formula by the expression C $\genfrac{}{}{0ex}{}{\text{2}}{\text{in}}$ is 2.5 or less. 2. Compositions based on a propylene polymer according to claim 1, having an MFR L of 0.5 to 50 g / 10 min. 3. The polymerization method to obtain a composition based on a propylene polymer according to claim 1, comprising at least two successive stages, in which components A) and B) are obtained in separate successive stages, carrying out the process at each stage, except for the first stage , in the presence of the formed polymer and the catalyst used in the previous step. 4. Bottles and containers, including compositions based on a propylene polymer according to claim 1. 5. Bottles and containers obtained from the propylene polymer composition according to claim 1, wherein said compositions have an MFRL of 0.5 to 2.5 g / 10 min. 6. Bottles and containers according to claim 5, obtained by the method of pneumoforming with extrusion.