Ethylenic Resin and Blow Molded Article Obtained Therefrom

• US 20100227098A1
• Filed: 02/14/2007
• Published: 09/09/2010
• Est. Priority Date: 02/15/2006
• Status: Abandoned Application

• Current Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals), Prime Polymer Company Limited (Mitsui Chemicals)
• Original Assignee: Mitsui Chemicals Incorporated (Mitsui Chemicals), Prime Polymer Company Limited (Mitsui Chemicals)
• Inventors: Fukushi, Keiko, Okamoto, Masahiko, Iwamasa, Kenji
• Application Number:
  US12/223,934
• Publication Number:
  US 20100227098A1
• Time in Patent Office: Days
• US Class Current: 428/36.920
• CPC Class Codes: C08F 210/14 Monomers containing five or more carbon atoms
• CPC Class Codes: C08F 210/16 Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
• CPC Class Codes: C08F 2500/07 High density, i.e. > 0.95 g/cm3
• CPC Class Codes: C08F 2500/11 Melt tension or melt strength
• CPC Class Codes: C08F 2500/12 Melt flow index or melt flow ratio
• CPC Class Codes: C08F 2500/13 Environmental stress cracking resistance
• CPC Class Codes: C08L 2203/10 used for bottles
• CPC Class Codes: C08L 23/06 Polyethene
• CPC Class Codes: C08L 23/0815 Copolymers of ethene with aliphatic 1-olefins
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: Y10T 428/1397 Single layer [continuous layer]

Abstract

An ethylene-based resin satisfying simultaneously the following requirements [a] to [c] is excellent in strength and moldability and is suitably used for a blow molded article (a hollow molded article). [a] The environmental stress cracking resistance (ESCR), T, at 50° C. is 500 hours or more in the case of a flexural modulus of 1000 MPa to 1500 MPa and is 100 hours or more in the case of a flexural modulus of 1500 MPa to 2000 MPa, as measured according to ASTM-D-1693, [b] the melt tension at 190° C. is 50 (mN) or more and [c] the melt breaking drawing rate is 90 (m/min) or less.

Claims

1. An ethylene-based resin simultaneously satisfying the following requirements [a] to [c]:

[a] the environmental stress cracking resistance (ESCR), T (hours), at 50°

C. is 500 hours or more in the case of a flexural modulus of 1000 MPa to 1500 MPa and is 100 hours or more in the case of a flexural modulus of 1500 MPa to 2000 MPa, as measured according to ASTM-D-1693;

[b] the melt tension at 190°

C. is 50 (mN) or more; and

[c] the melt breaking drawing rate is 90 (m/min) or less.

2. The ethylene-based resin according to claim 1, simultaneously satisfying the above requirements [a] to [c] and the following requirements [d] to [f]:

[d] the flexural modulus, M (MPa), satisfies 1000≦

M≦

2000, as measured at 23°

C. according to ASTM-D-790;

[e] the MFR (g/10 min) is 0.10 or more and less than 2.0, as measured at 190°

C. under a load of 2.16 kg according to JIS K7210; and

[f] the MFR ratio between the MFR (g/10 min) under a load of 2.16 kg and the HLMFR (g/10 min) under a load of 21. 6 kg (HLMFR/MFR) is 50 or more and less than 150, as measured at 190°

C. according to JIS K7210.

3. A blow molded article formed of the ethylene-based resin according to claim 1 or 2.

4. The blow molded article according to claim 3, wherein the blow molded article is a fuel tank, an industrial chemical can or a bottle container.