孝夫 田谷野

TL;DR: In this article, the authors proposed a polypropylene resin composition which can obtain a uniform and fine foaming cell, and with which a foamed sheet and thermoformed product can be produced which has excellent appearance and is excellent in thermoformability, impact resistance, lightweight properties, stiffness, heat resistance, heat insulating properties, oil resistance, and the like.

TL;DR: In this article, a block copolymer is obtained by carrying out successive polymerization by using a metallocene-based catalyst, and the integrated amount of the component eluting when the temperature is raised to a temperature T(C) which is an intermediate point of both peaks is 30-70 wt%.

TL;DR: In this article, a block copolymer is obtained by sequentially polymerizing propylene homopolymer or propylene-ethylene random copolymers component (A1) containing ethylene in a larger amount by 5 to 20 wt. % than that of the component(A1), in the presence of a metallocene-based catalyst.

TL;DR: In this article, a method for producing a propylenic random copolymer, by which a reactor can stably operate without generating the fouling of the wall surfaces and piping wall surfaces of the reactor or post-treatment systems by the polymer without coagulating the powder particles of the polymer, is presented.

TL;DR: In this paper, a propylene-ethylene random block copolymer is obtained by using a metallocene-based catalyst, and the copolymers satisfy conditions (i) and (ii) as follows: the component (A) has a melting peak temperature of 105-145°C, when measured by a differential scanning calorimeter; and (iii) a temperature-loss tangent curve (tanδ curve) obtained by solid viscoelasticity measurement.