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Propylene compsn, process for preparing same, polypropylene compsn., and molded articles

A polypropylene composition and the technology of the composition are applied in the directions of synthetic resin layered products, layered products, chemical instruments and methods, etc., which can solve problems such as insufficient bonding strength and achieve the effect of excellent welding strength.

Inactive Publication Date: 2003-05-28
JNC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of pipe has insufficient bonding strength between the rigid part and the flexible part

Method used

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  • Propylene compsn, process for preparing same, polypropylene compsn., and molded articles
  • Propylene compsn, process for preparing same, polypropylene compsn., and molded articles
  • Propylene compsn, process for preparing same, polypropylene compsn., and molded articles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0123] The present invention will be explained in more detail by way of Examples and Comparative Examples. A. Synthesis of propylene composition (A) 1) Measurement of physical properties

[0124] During the synthesis of the propylene composition, the physical properties of the intermediate and final products were measured by the following methods.

[0125] The synthesis conditions and measurement results are shown in Table 1 and Table 2.

[0126] a) Average particle size (µm) of titanium-containing solid catalyst component (a): Calculated from particle distribution measured with a Master classifier (manufactured by MALVERN Corporation). b) Uniformity of the titanium-containing solid catalyst component (a): Measured with a Master granulator to measure particle distribution, the particle size of 10% of the sieve bottom material is divided by the particle size of 60% of the sieve bottom material (manufactured by MALVERN company ). c) Polymer yield per unit weight of catalyst: ...

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PUM

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Abstract

A polypropylene composition for preparing various molded articles having well-balanced properties among moldability, molding shrinkage, rigidity, flexibility, impact resistance particularly at low temperatures, transparency, gloss and blushing resistance; various molded articles possessing the above properties; a propylene composition suitable as a base resin for the polypropylene composition; and a process for preparing the same. The propylene composition is characterized by comprising a homopolymer of propylene and a propylene / ethylene copolymer, the intrinsic viscosity ([ eta ]RC) of the copolymer being in the range of from 1.7 to 2.8 dl / g, the intrinsic viscosity ratio ([ eta ]RC / [ eta ]PP) of the homopolymer to the copolymer being in the range of from 0.7 to 1.2, and the product of the homopolymer to copolymer weight ratio (WPP / WRC) and the intrinsic viscosity ratio thereof, (WPP / WRC)x([ eta ]RC / [ eta ]PP), being in the range of from 1.0 to 3.0.

Description

technical field [0001] The present invention relates to propylene compositions, in particular the present invention relates to propylene compositions comprising propylene homopolymers and propylene-ethylene copolymers, processes for their production, polypropylene compositions based on the aforementioned propylene compositions and molded articles of these compositions , especially injection molded products, extruded sheets, films and blow molded products. Background technique [0002] Polypropylene resin is relatively cheap and has good performance, and therefore, is widely used in various molded products, such as injection molded products such as plates, containers, caps and products with hinged leaf (hinge) structures; films; and blow molded products such as guides trachea. Utilizing its mechanical, optical and thermal properties, polypropylene resin films have been widely used in food packaging materials and fiber products. [0003] To ensure the performance required in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32C08F110/06C08F210/06C08F255/02C08F297/08C08J5/18C08L23/08C08L23/10C08L23/16C08L51/06C08L53/00
CPCC08L23/0815C08L23/16C08J2323/10C08F297/083C08F210/06C08F110/06C08L51/06C08J5/18C08F255/02B32B27/32C08L53/00C08L23/10C08L2666/04C08L2666/02C08F2500/15C08F2500/12C08F2500/26C08F210/16C08F2500/17C08L23/12C08J5/00C08F297/08
Inventor 冈山千加志中岛隆则木村雅美木村一博若田真弓山本寿树石井弘久杉本昌隆河野升治中川泰彦乡田邦雄望月泰宏齐藤则昭横田纯一郎
Owner JNC CORP
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