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Propylene resin composition, method for producing propylene resin composition, propylene polymer composition, molded body made of the propylene resin composition, and electric wire
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However, although the molded article used in Patent Document 1 is excellent in flexibility and impact resistance, it has insufficient damage resistance.
[0004] In addition, generally, a molded article made of polypropylene resin has high elasticity when it is bent, and does not exhibit flexibility (stress absorption) like a molded article made of polyvinyl chloride.
This depends on the characteristics of polypropylene resin, and it is very difficult to improve this flexibility (stress absorption) in existing materials
Method used
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Embodiment 1
[0427] Using a Labo Plastomill manufactured by Toyo Seiki Seisakusho Co., Ltd., the composition composed of the formulations in Table 4 was kneaded, and molded into a sheet with a thickness of 2 mm by a pressure molding machine (heating: 190° C. × 7 min, Cooling: 15°C×4min, cooling rate: -40°C / min). This sheet was evaluated for the aforementioned mechanical properties, hardness, heat resistance, scratch resistance, and stress absorbability. The results are shown in Table 4.
[0428] [Examples 2 to 10, Reference Example 1, Comparative Example 1]
[0429] Molding and evaluation were carried out in the same manner as in Example 1, except for changing to a composition composed of the formulations in Table 3. The results are shown in Table 4.
[0430]
[0431] The propylene-based resin composition (Examples 1 to 10) of the present invention has good heat resistance and excellent damage resistance and stress absorption properties compared with the ethylene-based resin compositio...
Embodiment 11～14
[0432] [Examples 11 to 14, Comparative Example 11]
[0433] Using a Labo Plastomill manufactured by Toyo Seiki Seisakusho Co., Ltd., the composition composed of the formulations in Table 5 was kneaded, and molded into a sheet with a thickness of 2 mm by a pressure molding machine (heating: 190° C. × 7 min. Cooling: 15°C×4min, cooling rate: -40°C / min). The above-mentioned mechanical properties, hardness, low-temperature properties, and abrasion resistance were evaluated for this sheet. The results are shown in Table 5.
[0434]
[0435] Compared with Comparative Example 11, the propylene-based resin composition (Examples 11 to 14) of the present invention has particularly excellent elongation at break (EL) and abrasion resistance.
[0436] In addition, in figure 2 represents the above iPP (a-1), sPP (a-2), PBER (b-1) and PER (b-2), and the following polymers (AA-1) to (AA-5), (BB Relationship between MFR and [η] of -1) to (BB-8) and isotactic polymers (DD-1) to (DD-8). ...
Synthetic example 1
[0438] Diphenylmethylene (3-tert-butyl-5-ethylcyclopentadienyl) (2,7-di-tert-butylfluorenyl) di Synthesis of ZirconiumChloride
[0439] (i) Synthesis of 1-ethyl-3-tert-butylcyclopentadiene
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Abstract
Disclosed is a propylene resin composition characterized by containing 0-80% by weight of a propylene polymer (A) having a melting point not less than 100 DEG C as measured by a differential scanning calorimeter, 5-85% by weight of a specific soft propylene copolymer (B), 0-40% by weight in total of one or more elastomers (C) selected from ethylene elastomers (C1) and styrene elastomers (C2), and 15-80% by weight of an inorganic filler (D). (In this connection, the total of the components (A), (B), (C) and (D) is 100% by weight.) This propylene resin composition contains an inorganic filler at a high ratio, and has excellent elongation at break, low temperature characteristics, whitening resistance, scratch resistance, wear resistance, stress absorption and flame retardance in addition to good flexibility.
Description
technical field [0001] The present invention relates to a propylene resin composition and a molded article formed from the composition. Background technique [0002] Polypropylene-based resins are materials superior in heat resistance, mechanical strength, damage resistance, and abrasion resistance compared to polyethylene-based resins (polyethylene-based elastomers), and molded products thereof are used in a wide range of applications. Although molded articles obtained from general polypropylene and inorganic fillers are excellent in heat resistance and mechanical strength, they are inferior in flexibility and impact resistance. Therefore, polyethylene-based resins are mainly used in applications requiring properties such as flexibility and impact resistance. However, molded articles obtained from polyethylene-based resins have a problem of poor scratch resistance. [0003] On the other hand, electric wires or wiring harnesses requiring damage resistance are known as mold...
Claims
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