Japan Polypropylene Corporation

Masaaki Ito

Hideshi Uchino

Masaru Aoki

Masato Nakano

Yoshiyuki Ishihama

Shinichi Kitade

Kazuya Sakata

Kazuo Asuka

Fusaaki Katou

Jun Shinozaki

Miori Takizawa

A propylene-based polymer comprising the following component (A) insoluble in p-xylene at 25&#xb0; C. and component (B) soluble in p-xylene at 25&#xb0; C., wherein (i) the weight average molecular weight (Mw) measured with GPC is 100,000 to 1,000,000, (ii) the content of the component insoluble in hot p-xylene is 0.3% by weight or lower, and (iii) the degree of strain hardening (&#x3bb; max) in measurement of elongational viscosity is 2.0 or higher; and a method for producing the same, along with a resin composition comprising a propylene-ethylene copolymer (Z) in an amount of 50.0 to 99.9% by weight and a propylene-based polymer (M) in an amount of 0.1 to 50.0% by weight. Component (A): a component (CXIS) insoluble in p-xylene at 25&#xb0; C., having requirements specified by (A1) to (A5). Component (B): a component (CXS) is soluble in p-xylene at 25&#xb0; C., having requirements specified by (B1) to (B4).

Propylene-based polymer and method for producing the same, and propylene-based resin composition

A propylene-based polymer which is suitably applicable to foam molding, sheet molding, blow molding or the like, because of having good flow characteristics, high melt tension, high swell ratio and thus good molding workability. It is attained by a propylene-based polymer or the like characterized by satisfying the following requirements (i) to (vi). Requirement (i): MFR is 0.1 g/10 minutes to 100 g/10 minutes. Requirement (ii): Q value by GPC is 3.5 to 10.5. Requirement (iii): ratio of components with a molecular weight of equal to or higher than 2,000,000, in a molecular weight distribution curve obtained by GPC, is equal to or larger than 0.4% by weight and less than 10% by weight. Requirement (iv): components, which elute at a temperature of equal to or lower than 40&#xb0; C., are equal to or less than 3.0% by weight, in temperature rising elution fractionation by ODCB. Requirement (v): isotactic triad fraction (mm) measured withC-NMR is equal to or higher than 95%. Requirement (vi): strain hardening degree (&#x3bb;max), in measurement of extensional viscosity, is equal to or higher than 6.0.

Propylene-based polymer, production method therefor, composition using the same, and application thereof

Growing community of inventors

Yokkaichi, Japan

Masaaki Ito