Patent ID: 11912849
Assignee: BOREALIS AG
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. Granules comprising a fiber reinforced composition (C), comprising
i) an at least bimodal propylene polymer (PP), wherein the propylene polymer (PP) has a xylene cold soluble (XCS) content of below 3.1 wt.-%,
ii) an elastomeric ethylene copolymer (E) which is a copolymer of ethylene and a C4-C10 α-olefin,
iii) an adhesion promoter (AP), and
iv) long fibers (LF),
wherein said fiber reinforced composition (C) fulfils in-equation (Ia), 4
       ⁢
       
        0
        .
        0
       
      
      >
      
       
        w
        ⁡
        (
        
         P
         ⁢
         P
        
        )
       
       
        w
        ⁡
        (
        E
        )
       
      
      >
      
       5
       .
       3
      
     
     ,
    
   
   
    
     (
     Ia
     )
    
   
  
 

wherein w(PP) is the weight fraction [in wt.-%] of the propylene polymer (PP), based on the overall weight of the fiber reinforced composition (C), and w(E) is the weight fraction [in wt.-%] of the elastomeric ethylene copolymer (E), based on the overall weight of the fiber reinforced composition (C);
wherein the propylene polymer (PP) comprises
i′) a first propylene polymer (PP1) having a melt flow rate MFR2 (230° C., 2.16 kg) determined according to ISO 1133 of at least 100 g/10 min, and
ii′) a second propylene polymer (PP2) having a melt flow rate MFR2 (230° C., 2.16 kg) determined according to ISO 1133 below 150 g/10 min,
with the proviso that the first polypropylene (PP1) has a higher melt flow rate MFR2 (230° C., 2.16 kg) determined according to ISO 1133 than the second propylene polymer (PP2), and
wherein the granules comprise
a) an inner layer comprising the long fibers (LF) and the first propylene polymer (PP1), and
b) an outer layer coated onto the core comprising the second propylene polymer (PP2) and the elastomeric ethylene copolymer (E),
wherein the inner layer and/or the outer layer further comprises the adhesion promoter (AP).