Sabic Global Technologies B.v.

Ricardo Bou Reslan Calumby

Marc Herklots

Kathleen Ann Vandewiele

Martin Alexander Zuideveld

Aurora Alexandra Batinas-Geurts

Désirée Marie Louise Seegers

Koenraad Johannes Gerardus Van Straaten

Van Koenraad Johannes Gerardus Straaten

The invention relates to a process for the preparation of a final heterophasic propylene copolymer (A) having a final melt flow rate in the range from 65 to 110 dg/min, comprising visbreaking an intermediate heterophasic propylene copolymer (A') having an intermediate melt flow rate, which intermediate melt flow rate is lower than the final melt flow rate, to obtain the final heterophasic propylene copolymer,

Heterophasic propylene copolymer

The invention relates to a composition comprising (A) a heterophasic propylene copolymer and (B) a nucleating composition, wherein (A) the heterophasic propylene copolymer consists of (a) a propylene-based matrix, wherein the propylene-based matrix consists of a propylene homopolymer and wherein the propylene-based matrix is present in an amount of 83 to 88 wt %, preferably 84 to 88 wt %, based on the total heterophasic propylene copolymer and (b) a dispersed ethylene-&#x3b1;-olefin copolymer, wherein the dispersed ethylene-&#x3b1;-olefin copolymer is present in an amount of 12 to 17 wt %, preferably of 12 to 16 wt %, based on the total heterophasic propylene copolymer and wherein the sum of the total amount of propylene-based matrix and total amount of the dispersed ethylene-&#x3b1;-olefin copolymer in the heterophasic propylene copolymer is 100 wt %, wherein the amount of ethylene in the ethylene-&#x3b1;-olefin copolymer is 40 to 60 wt % and wherein the heterophasic propylene copolymer has a melt flow index of 35 to 50 g/10 min as determined according to ISO1133 at 230&#xb0; C. and 2.16 kg and wherein (B) the nucleating composition comprises (i) a first nucleating agent, which comprises a cyclic dicarboxylate salt compound; and (ii) a second nucleating agent, which comprises talc, wherein the cyclic dicarboxylate salt compound has the formula (I):Ph(COO&#x2014;)Ca+&#x2003;&#x2003;(I).

Composition comprising heterophasic propylene copolymer

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Geleen, Netherlands

Ricardo Bou Reslan Calumby