Polypropylene composite
View Patent ↗Fiber reinforced composition comprising (a) a polypropylene random copolymer comprising ethylene and/or C 4 to C 8 α-olefin (PP-RACO), (b) fibers (F), and (c) a polar modified polypropylene as adhesion promoter (AP), wherein (i) the polypropylene random copolymer comprising ethylene and/or C 4 to C 8 α-olefin (PP-RACO) heaving a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 of at least 5 g/10 min, (ii) the fibers (F) are selected from the group consisting of glass fibers, metal fibers, ceramic fibers and graphite fibers, and (iii) the polymer contained in the reinforced composition forms a continuous phase being the matrix of the fiber reinforced composition.
1. Fiber reinforced composition consisting essentially of:
(a) a polypropylene random copolymer comprising ethylene and/or C 4 to C 8 α-olefin (PP-RACO),
(b) fibers (F), and
(c) a polar modified polypropylene as adhesion promoter (AP),
(d) optionally a masterbatch, and
(e) optionally one or more additives,
wherein;
(i) the polypropylene random copolymer comprising ethylene and/or C 4 to C 8 α-olefin (PP-RACO) having a melt flow rate MFR 2 (230 ° C.) measured according to ISO 1133 of at least 5 g/10min,
(ii) the fibers (F) are selected from the group consisting of glass fibers, metal fibers, ceramic fibers and graphite fibers, and
(iii) the complete polymer contained in the reinforced composition forms a continuous phase being the matrix of the fiber reinforced composition.
2. Fiber reinforced composition according to claim 1 , wherein the polypropylene random copolymer (PP-RACO) comprises 1.0 to 5.0 wt. % of ethylene and/or C 4 to C 8 α-olefin.
3. Fiber reinforced composition according to claim 1 , wherein the polypropylene random copolymer (PP-RACO) has a xylene cold soluble content (XCS) measured according ISO 16152 (23° C.) of not more than 20wt. %.
4. Fiber reinforced composition according to claim 1 , wherein the polypropylene random copolymer (PP-RACO) has a monomodal, bimodal or multimodal molecular weight or comonomer distribution.
5. Fiber reinforced composition according to claim 1 , wherein the overall melt flow rate MFR 2 (230° C.) measured according to ISO 1133 is at least 4 g/10min.
6. Fiber reinforced composition according to claim 1 , wherein the overall tensile modulus is at least 5000 MPa.
7. Fiber reinforced composition according to claim 1 , wherein the fibers (F) are glass fibers.
8. Fiber reinforced composition according to claim 1 , wherein the composition consists essentially of:
(a) 30 to 75 wt. % of a polypropylene random copolymer comprising ethylene and/or C 4 to C 8 α-olefin (PP-RACO),
(b) 20 to 45 wt. % fibers (F), and
(c) 0.5 to 5.0 wt. % of a polar modified polypropylene as adhesion promoter (AP),
(d) 0.0 to 3.0 wt. % of a masterbatch,
(e) 0.0 to 3.0 wt. % of one or more additives, based on the total weight of the fiber reinforced composition.
9. Automotive article comprising the fiber reinforced composition according to claim 1 .
10. A foamed article, comprising the fiber reinforced composition according to claim 1 .
11. Process for the preparation of the fiber reinforced composition according to claim 1 , comprising the steps of adding:
(a) polypropylene random copolymer (PP-RACO),
(b) the fibers (F), and
(c) the polar modified polypropylene as adhesion promoter (AP) to an extruder and extruding the same obtaining said fiber reinforced composition.