Carbon fiber-reinforced resin composition and shaped product obtained therefrom

A carbon fiber-reinforced resin composition, comprising:

• 100 parts by mass of a polymer alloy (A) which comprises:
• 25 to 95% by mass of one or more propylene-based polymers (p) selected from a propylene-ethylene block copolymer, a propylene homopolymer and a propylene-ethylene random copolymer having an ethylene content of 5% by mass or less,
• 1 to 60% by mass of an acid-modified polyolefin resin (m),
• 0 to 40% by mass of an ethylene-based polymer (e) and
• 0 to 50% by mass of a polyamide (n)
• wherein the total of the component (p), the component (m), the component (e) and the component (n) is 100% by mass, and
• 1 to 200 parts by mass of a carbon fiber (B);
• the acid-modified polyolefin resin (m) comprises a maleic acid-modified propylene-based polymer (m1);
• the total of Wp and Wm1 is 50 to 98% by mass, in which the content of the component (p) is expressed by Wp% by mass, the content of the component (m1) is expressed by Wm1% by mass (the content of the whole component (m) is expressed by Wm % by mass), the content of the component (e) is expressed by We% by mass, and the content of the component (n) is expressed by Wn% by mass in the polymer alloy (A), and the total of Wp, Wm, We and Wn is 100% by mass;
• and additionally;
• and,
• the following formula (1) is satisfied in which the melt flow rate (MFR) of the component (p) measured at 230° C. under a load of 2.16 kg according to ASTM D1238 is expressed by MFRp (g/10 min) and the melt flow rate (MFR) of the component (m1) measured at 230° C. under a load of 2.16 kg according to ASTM D1238 is expressed by MFRm1 (g/10 min).
• Qp×log(MFRp)+Qm1×log(MFRm1)>log 120 (1)
• wherein, QP Wp (Wp+Wm1), Qm1=Wm1/(Wp Wm1)