Intumescent polypropylene beads, method for producing intumescent polypropylene beads, molded article formed from intumescent polypropylene beads and method for forming such molded article

Expanded polypropylene beads comprising a polypropylene composition (C), the polypropylene composition (C) having: a) a melt flow rate (MFR2) in the range of from 1.5 to 15.0 g/10 min; b) a melting temperature (Tm) in the range of 135 to 158 DEG C; and c) a loss tangent (tan [delta]) in the range of 2.00 to 4.00 wherein the polypropylene composition (C) comprises more than 90.0% by weight of a long chain branched propylene copolymer (c-PP) comprising up to 8.0% by weight of a comonomer selected from ethylene and C4 to C10 [alpha] olefins, a process for the preparation of said beads, and a method of forming a molded article from the beads, and the molded article thus obtained. 包含聚丙烯组合物(C)的膨胀型聚丙烯珠粒，该聚丙烯组合物(C)具有：a)在1.5至15.0g/10min范围内的熔体流动速率(MFR2)；b)在135至158℃范围内的熔融温度(Tm)；和c)在2.00至4.00范围内的损耗角正切(tanδ)，其中该聚丙烯组合物(C)包含超过90.0重量％的长链支链丙烯共聚物(c-PP)，该长链支链丙烯共聚物(c-PP)包含至多8.0重量％的选自乙烯和C4至C10α烯烃的共聚单体，一种用于制备所述珠粒的方法，以及一种由所述珠粒形成模塑制品的方法，以及由此获得的模塑制品。