Propylene-based compositions comprising carbon fibers and a thermoplastic polyolefin elastomer
AssigneeDow Global Technologies LLC
InventorsElodie HABLOT, Russell P. BARRY
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Abstract
The present disclosure relates to a composition comprising: (A) from 30 wt % to 94 wt % of a propylene component including at least one propylene-based polymer having a propylene content of at least 75 wt %, based on the total weight of the propylene-based polymer, and a melt flow rate of at least 10 g/10 minutes as measured by ISO 1133 at 230 C/2.16 kg; (B) from 1 wt % to 50 wt % of a carbon fiber component; (C) from 5 wt % to 69 wt % of a thermoplastic polyolefin elastomer; and, optionally, (D) from 0.1 wt % to 15 wt % of a compatibilization agent.
Claims9
A composition comprising:
- (A) from 30 wt % to 94 wt % of a propylene component including at least one propylene-based polymer having a propylene content of at least 75 wt %, based on the total weight of the propylene-based polymer, and a melt flow rate of at least 10 g/10 minutes as measured by ISO 1133 at 230° C./2.16 kg;
- (B) from 1 wt % to 50 wt % of a carbon fiber component;
- and
- (C) from 5 wt % to 69 wt % of a thermoplastic polyolefin elastomer.
The composition according to any of the preceding claims, wherein the carbon fiber component comprises chopped carbon fibers sized with an epoxy- and phenoxy-based emulsion.
The composition according to any of the preceding claims, wherein the thermoplastic polyolefin elastomer has a density from 0.850 g/cc to 0.875 g/cc as measured by ASTM D792 and a melt flow index from 0.1 g/10 minutes to 50 g/10 minutes as measured by ASTM D1238 at 190° C./2.16 kg.
The composition according to any of the preceding claims, wherein the thermoplastic polyolefin elastomer is an ethylene/alpha-olefin interpolymer.
The composition according to any of the preceding claims, wherein the thermoplastic polyolefin elastomer is an olefin block copolymer
The composition according to any of the preceding claims, wherein the compatibilization agent is a maleic anhydride grafted polypropylene.
The composition according to any of the preceding claims, further comprising a flexural modulus of greater than 2000 MPa, a Charpy impact strength of greater than 6 kJ/m2, and a falling dart maximum force energy of greater than 4 J.
The composition according to any of the preceding claims, further comprising an average CLTE value of less than 5E-05 m/m/° C. via machine direction and an average CLTE value of less than 8E-05 m/m/° C. via transverse direction.
Dependencies are inferred from the claim text.