JP2007284667A5

JP2007284667A5 -

Info

Publication number: JP2007284667A5
Application number: JP2007073906A
Authority: JP
Filing date: 2007-03-22
Publication date: 2010-02-12
Anticipated expiration: 2027-03-22

Description

（Ａ−２）アルコールを０．０５〜２０モル反応させて得られる固体を、さらに
（Ａ−３）一般式ＡｌＲ^５ _ｓＱ_３-ｓ
（式中Ｒ^５は炭素数１〜２０の炭化水素基であり、ＱはＯＲ^６，ＯＳｉＲ^７Ｒ^８Ｒ^９，ＮＲ^１０Ｒ^１１，ＳＲ^１２およびハロゲンから選ばれた基を表し、Ｒ^６，Ｒ^７，Ｒ^８，Ｒ^９，Ｒ^１０，Ｒ^１１，Ｒ^１２は水素原子または炭化水素基であり、０＜ｓ）で示される有機金属化合物を、反応させて得られる固体に、（Ａ−４）チタニウム化合物を、前記（Ａ−３）成分の存在下に反応させて得られる固体触媒成分であることを特徴とする（１）記載のボトルキャップ用ポリエチレン樹脂組成物の製造方法である。 (A-2) A solid obtained by reacting 0.05 to 20 moles of alcohol is further subjected to (A-3) general formula AlR ⁵ _s Q _3-s
(Wherein R ⁵ is a hydrocarbon group having 1 to 20 carbon atoms, Q represents a group selected from OR ⁶ , OSiR ⁷ R ⁸ R ⁹ , NR ¹⁰ R ¹¹ , SR ¹² and halogen, R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ , R ¹¹ , R ¹² are hydrogen atoms or hydrocarbon groups, and 0 <s) is converted to a solid obtained by reacting an organometallic compound represented by (A- 4) The method for producing a polyethylene resin composition for bottle caps according to (1), which is a solid catalyst component obtained by reacting a titanium compound in the presence of the component (A-3).

Claims

A polyethylene resin composition for bottle caps that satisfies the following requirements (a) to (f).
(A) The ratio of the low molecular weight component (A) made of an ethylene homopolymer having an MFR of code D in the range of 100 to 500 g / 10 min is 70 to 30 wt%, and ethylene and an α-olefin having 3 to 20 carbon atoms The proportion of the high molecular weight component (B) consisting of a copolymer with 30 to 70 wt%
(B) MFR 5.0 to 10.0 g / 10 min of code D
(C) Density is 0.960-0.967 g / cm ³
(D) Molecular weight distribution (Mw / Mn) is 8.0 to 12.0
(E) Environmental stress crack resistance (ESCR) is 20 hours or more. (F) Resin measured with a 150 mm square, 2 mm thick film gate plate, injection molded at a cylinder temperature of 200 ° C. and a mold temperature of 50 ° C. The ratio (MD / TD) of the mold shrinkage (MD) in the flow direction and the mold shrinkage (TD) in the direction perpendicular to the resin flow is 1.0 to 2.5.

The method for producing a polyethylene resin composition according to claim 1, wherein a polymerization catalyst comprising a solid catalyst component [A] and an organoaluminum compound [B] is used, polymerized by a two-stage polymerization method, and ethylene in a first-stage polymerization tank. A homopolymer is polymerized, and a copolymer of ethylene and an α-olefin having 3 to 20 carbon atoms is polymerized in a second stage polymerization tank, and the solid catalyst component [A] is ( A-1) (i) the general formula _{_{(Al) α (Mg) β}} (R 1) p (R 2) q (oR 3) in _r ^[wherein, R 1, ^{R 2} and ^{R 3} having from 2 to 20 carbon atoms And α, β, p, q, and r are numbers satisfying the following relationship.
0 ≦ α, 0 <β, 0 ≦ p, 0 ≦ q, 0 ≦ r, p + q> 0, 0 ≦ r / (α + β) ≦ 2, 3α + 2β = p + q + r]
1 mol of an organic magnesium component soluble in a hydrocarbon solvent represented by
(Ii) General formula H _a SiCl _b R ⁴ _{4- (a + b)} (wherein R ⁴ is a hydrocarbon group having 1 to 20 carbon atoms, and a and b are numbers satisfying the following relationship: 0 <A, 0 <b, a + b ≦ 4) With respect to 1 mol of C—Mg bonds contained in a solid obtained by reacting 0.01 to 100 mol of a chlorosilane compound having a Si—H bond represented by
(A-2) A solid obtained by reacting 0.05 to 20 moles of alcohol is further added to (A-3) general formula AlR ⁵ _s Q _3-s
(Wherein R ⁵ is a hydrocarbon group having 1 to 20 carbon atoms, Q represents a group selected from OR ⁶ , OSiR ⁷ R ⁸ R ⁹ , NR ¹⁰ R ¹¹ , SR ¹² and halogen, R ⁶ , R ⁷ , R ⁸ , R ⁹ , R ¹⁰ , R ¹¹ , R ¹² are hydrogen atoms or hydrocarbon groups, and 0 <s) is converted to a solid obtained by reacting an organometallic compound represented by (A- 4) The method for producing a polyethylene resin composition for bottle caps according to claim 1, which is a solid catalyst component obtained by reacting a titanium compound in the presence of the component (A-3).