Olefin block copolymers and production methods thereof

Patent metadata

Field	Value
Publication number	US-9000115-B2
Application number	US-201213359022-A
Country	US
Kind code	B2
Filing date	Jan 26, 2012
Priority date	Jan 27, 2011
Publication date	Apr 7, 2015
Grant date	Apr 7, 2015

Abstract

The present description relates to olefin block copolymers having excellent elasticity and processability in conjunction with enhanced heat resistance, and to a preparation method thereof. The olefin block copolymers comprise a plurality of blocks or segments that comprise ethylene or propylene repeating units and α-olefin repeating units at different mole fractions from one another, wherein the block copolymer shows peaks at the 2θ of 21.5±0.5° and 23.7±0.5° in a wide-angle x-ray diffraction (WAXD) pattern, and the peak ratio defined by (the peak area at 21.5±0.5°)/(the peak area at 23.7±0.5°) is no more than 3.0.

First claim

What is claimed is:

1. An olefin block copolymer comprising a plurality of blocks or segments that comprise ethylene or propylene repeating units and C4 or more α-olefin repeating units at different mole fractions from one another,
wherein the block copolymer shows peaks at the 2θ of 21.5±0.5° and 23.7±0.5° in its wide-angle x-ray diffraction (WAXD) pattern; and the peak ratio as defined by (the peak area at 21.5±0.5°)/(the peak area at 23.7±0.5°) is no more than 3.0.

2. The olefin block copolymer in accordance with claim 1 , wherein the peak as shown at 21.5±0.5° has a full width at half maximum (FWHM) value of at least 0.45°.

3. The olefin block copolymer in accordance with claim 1 , wherein the degree of crystallization as derived from a ratio of a crystalline peak area to a pattern area of the WAXD pattern is from 10 to 30%.

4. The olefin block copolymer in accordance with claim 1 , wherein the block copolymer has a crystallization temperature (T c ) of 95 to 120° C.

5. The olefin block copolymer in accordance with claim 1 , wherein the block copolymer has a melting temperature (T m ) of 110 to 135° C.

6. The olefin block copolymer in accordance with claim 1 , wherein the block copolymer comprises a hard segment comprising a first mole fraction of C4 or more α-olefin repeating units and a soft segment comprising a second mole fraction of C4 or more α-olefin repeating units, and the second mole fraction is higher than the first mole fraction.

7. The olefin block copolymer in accordance with claim 6 , wherein the mole fraction of C4 or more α-olefin repeating units contained in the entire block copolymer has a value between the first mole fraction and the second mole fraction.

8. The olefin block copolymer in accordance with claim 6 , wherein the block copolymer comprises 20 to 95 mol % of hard segments and 5 to 80 mol % of soft segments.

9. The olefin block copolymer in accordance with claim 6 , wherein the hard segment has a higher value than the soft segment in at least one characteristic among a degree of crystallization, a density, and a melting temperature.

10. The olefin block copolymer in accordance with claim 1 , wherein the block copolymer comprises 80 to 98 mol % of ethylene or propylene repeating units and a remaining amount of C4 or more α-olefin repeating units.

11. The olefin block copolymer in accordance with claim 1 , wherein the block copolymer has a density of 0.85 g/cm 3 to 0.92 g/cm 3 .

12. An olefin block copolymer comprising a plurality of blocks or segments that comprise ethylene or propylene repeating units and C4 or more α-olefin repeating units at different mole fractions from one another, wherein the block copolymer shows peaks at the 2θ of 21.5±0.5° and 23.7±0.5° in its wide-angle x-ray diffraction (WAXD) pattern; and the peak as shown at 21.5±0.5° has a full width at half maximum (FWHM) value of at least 0.45°.

Assignees

• Lee Yong Ho
• Jeon Manseong
• Kwon Heon-Yong
• Cho Min-Seok
• Kim Seon Kyoung
• Hong Dae-Sik
• Sohn Se Hui
• Lee Ki-Soo
• Lim Kyoung-Chan
• Lg Chemical Ltd

Inventors

• Lee Yong Ho
• Jeon Manseong
• Kwon Heon-Yong
• Cho Min-Seok
• Kim Seon Kyoung
• Hong Dae-Sik
• Sohn Se Hui
• Lee Ki-Soo
• Lim Kyoung-Chan

Classifications

• C08F210/14 Primary

  Monomers containing five or more carbon atoms · CPC title

• C08F4/65927

  two cyclopentadienyl rings being mutually bridged · CPC title

• C08F210/16

  Copolymers of ethene with alpha-alkenes, e.g. EP rubbers · CPC title

• C08F4/65912

  in combination with an organoaluminium compound · CPC title

• C08F297/083 Primary

  the monomers being ethylene or propylene · CPC title