Propylene polymer, composition containing the polymer, and molded objects obtained from these

A technology of polymer and resin composition, applied in transportation and packaging, thin material processing, etc., can solve the unsatisfactory problems of heat resistance and rigidity

Inactive Publication Date: 2007-12-12
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the trend of diversification and upgrading of industrial fields using plastics, there are gradually emerging application fields that cannot satisfy even heat resistance and rigidity, one of the excellent properties of conventional polypropylene.

Method used

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  • Propylene polymer, composition containing the polymer, and molded objects obtained from these
  • Propylene polymer, composition containing the polymer, and molded objects obtained from these
  • Propylene polymer, composition containing the polymer, and molded objects obtained from these

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1a

[0279] (1) Manufacture of solid catalyst carrier

[0280] Add 300 g of SiO to a 1 L sidearm flask 2 (manufactured by Tokai Chemical Co., Ltd.) As a sample, 800 ml of toluene was added and slurried. Then transfer the liquid to a 5-liter four-neck flask, and add 260 ml of toluene. 2830 ml of a toluene solution of methylaluminoxane (hereinafter abbreviated as MAO) (manufactured by ALBEMARLE, 10% by weight solution) was introduced. Keep at room temperature and stir for 30 minutes. The temperature was raised to 110° C. over 1 hour, and the reaction was carried out for 4 hours. After the reaction, cool to room temperature. After cooling, take out supernatant toluene, replace with new toluene, till replacement rate reaches 95% (wherein, term " replacement rate " among the present invention refers to solvent replacement rate, for example, will take out 9L toluene from 10L toluene, 9 L of heptane was added to achieve a "displacement rate" of 10 L defined as 90%).

[0281] (2) Man...

Embodiment 2a

[0293] It implemented in the same manner as Example 1a except having changed the polymerization method as follows.

[0294] (1) Main aggregation

[0295] With 40kg / hour of propylene, 5NL / hour of hydrogen, 1.0g / hour of catalyst slurry manufactured by the above-mentioned embodiment 1a (3) as solid catalyst component, 4.0ml / hour of triethylaluminum, the inner volume is 58 liters tubular The feed is continuously fed into the polymerizer, and the polymerization is carried out in a liquid-filled state in which there is no gas phase. The temperature of the tubular reactor was 30° C., and the pressure was 3.2 MPa / G.

[0296] The resulting slurry was sent to a tank-type polymerizer with a stirrer with an inner volume of 1,000 liters for further polymerization. Propylene was supplied to the polymerizer at 45 kg / hour, and hydrogen gas was supplied thereto so that the hydrogen concentration in the gas phase portion became 0.2 mol%. Polymerization was carried out under conditions of a p...

Embodiment 3a

[0302] It implemented in the same manner as Example 1a except having changed the polymerization method as follows.

[0303] (1) Main aggregation

[0304] With 40kg / hour of propylene, 5NL / hour of hydrogen, 1.0g / hour of catalyst slurry produced by the above-mentioned embodiment 1a (3) as solid catalyst component, 4.0ml / hour of triethylaluminum to the tubular polymerization of 58 liters of internal volume Continuously feed the material in the vessel, and carry out the polymerization in the state of being filled with liquid without gas phase. The temperature of the tubular reactor was 30° C., and the pressure was 3.2 MPa / G.

[0305] The resulting slurry was sent to a tank-type polymerizer with a stirrer with an inner volume of 1,000 liters for further polymerization. Propylene was supplied to the polymerizer at 45 kg / hour, and hydrogen gas was supplied thereto so that the hydrogen concentration in the gas phase portion became 0.2 mol%. Polymerization was carried out under condi...

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Abstract

A propylene polymer which is constituted of 10-40 wt.% component (Dsol) soluble in room-temperature n-decane and 60-90 wt.% component (Dinsol) insoluble in room-temperature n-decane, comprises skeletons derived from propylene (MP) and one or more olefins (MX) selected among ethylene and C4 and higher alpha-olefins, and satisfies all of the following requirements [1] to [5]. The polymer is characterized by having a high melting point and a high molecular weight. It is suitable for use in producing various moldings therefrom. [1] The molecular weight distributions (Mw / Mn) of Dsol and Dinsol as determined by GPC each is 4.0 or lower. [2] The melting point (Tm) of Dinsol is 156 DEG C or higher. [3] The sum of the 2,1-bond content and the 1,3-bond content in Dinsol is 0.05 mol% or lower. [4] The intrinsic viscosity [eta] (dL / g) of Dsol satisfies the relationship 2.2<[eta]<=6.0. [5] The concentration of skeletons derived from the olefin(s) (MX) in Dinsol is 3.0 wt.% or lower.

Description

technical field [0001] The present invention relates to a propylene-based polymer, a composition containing the polymer, and a molded article obtained therefrom. Background technique [0002] Highly crystalline polypropylene obtained by polymerizing propylene using a Ziegler-type catalyst is used in a wide range of applications as a thermoplastic resin material having both rigidity and heat resistance. [0003] In addition, in order to expand the use of highly crystalline polypropylene to fields requiring impact resistance, for example, the development of a propylene-ethylene block copolymer in which propylene is continuously Homopolymerization or the polymerization of a mixture of propylene and a small amount of ethylene, in the latter stage, the copolymerization of propylene and ethylene is carried out continuously to produce an amorphous propylene-ethylene copolymer. (In the following description, "propylene-ethylene block copolymer" may also be referred to as "block pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F210/06C08F297/08C08L23/10
CPCC08F4/65916C08L51/06Y10T428/1352C08F10/00C08L2314/06C08F255/02C08F297/083C08L23/10C08F297/08C08L53/00C08F210/16C08F255/00C08F210/06C08F4/65912C08L23/16C08L23/083C08L23/142C08F4/6492C08F4/65927C08L2666/24C08L2666/06C08L2666/08C08L2666/02C08F2500/03C08F2500/12C08F2500/17C08F2500/18C08F4/64C08J5/00
Inventor 板仓启太船谷宗人门坂绫子广田成俊西河博史山村雄一松村秀司桥诘聪佐佐木芳雄
Owner MITSUI CHEM INC
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