Patent ID: 9376549
Filing Date: 2016-06-28
CPC Classification: C08F,C08K,C08L

Claim Text:
1. A process for providing a polypropylene composition comprising at least 90 wt.-% of a branched polypropylene (b-PP), the process comprises at least a step (a) in which a polypropylene (PP) is reacted with a thermally decomposing free radical-forming agent and optionally with bifunctionally unsaturated monomer(s) and/or with multifunctionally unsaturated low molecular weight polymer(s) obtaining thereby the branched polypropylene (b-PP), and subsequent to step (a) a further step (b), in which to the branched polypropylene (b-PP) a linear polypropylene (l-PP′) having a melt flow rate MFR 2 (230° C.) of 1 to 18 g/10 min and F 30 melt strength of more than 1.0 cN and a v 30 melt extensibility of below 200 mm/s, wherein the F 30 melt strength and the v 30 melt extensibility are measured according to ISO 16790:2005, is added, wherein (a) the polypropylene (PP) has a melt flow rate MFR (b) the polypropylene composition and/or the branched polypropylene (b-PP) has/have a F wherein the linear polypropylene (l-PP′) comprises at least one additive (A) selected from the group consisting of antioxidants, metal deactivators, UV-stabilizers, antistatic agents, antifogging agents, acid scavengers, blowing agents, cling agents, lubricants, nucleating agents, slip agents, antiblocking agents and mixtures thereof.