Patent ID: 11905348
Assignee: MITSUI CHEMICALS, INC.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. An ethylene/α-olefin/non-conjugated polyene copolymer (S) having constitutional units derived from ethylene (A), an α-olefin (B) having 3 to 20 carbon atoms, and a non-conjugated polyene (C) having a total of two or more partial structures selected from the group consisting of the following general formulas (I) and (II) in a molecule, and
satisfying the following requirements (i) to (vii):, (i) a molar ratio of ethylene/α-olefin is 40/60 to 99.9/0.1;
(ii) a weight fraction of the constitutional unit derived from the non-conjugated polyene (C) is 0.07 wt % to 10 wt % per 100 wt % of the ethylene/α-olefin/non-conjugated polyene copolymer (S);
(iii) a weight average molecular weight (Mw) of the ethylene/α-olefin/non-conjugated polyene copolymer (S), a weight fraction of the constitutional unit derived from the non-conjugated polyene (C) (weight fraction of (C) wt %), and a molecular weight of the non-conjugated polyene (C) (molecular weight of (C)) satisfy the following expression (1);

4.5≤Mw×Weight fraction of (C)/100/Molecular weight of (C)≤40   Expression (1)

(iv) a ratio P(η*(ω=0.1/η*(ω=100)) of a complex viscosity η(ω=0.1) at a frequency ω=0.1 rad/s Pa·sec to a complex viscosity η(ω=100) at a frequency ω=100 rad/s, both obtained from linear viscoelasticity measurement (190° C.) by using a rheometer, an intrinsic viscosity [η], and the weight fraction of the constitutional unit derived from the non-conjugated polyene (C) (weight fraction of (C)) satisfy the following expression (2);

P/([η]2.9)≤Weight fraction of(C)×6  Expression (2)

(v) a ratio of a weight average molecular weight (Mw) to a number average molecular weight (Mn) molecular weight distribution; Mw/Mn measured by gel permeation chromatography (GPC) is in the range of 8 to 30;
(vi) the number average molecular weight (Mn) is 30,000 or less;
(vii) two or more peaks are shown in a chart obtained by GPC measurement and an area of the peak appearing on the side having the smallest molecular weight is in the range of 1 to 20% of the total peak area.