Title:
合成分枝ポリイソプレン及びそれらの製造方法
Document Type and Number:
Japanese Patent JP2006503935
Kind Code:
A
Abstract:
Crosslinkable synthetic polyisoprene (I) with an elongation of 150% under a tensile stress of at least 0.4 MPa, as measured by a defined test, is new. Crosslinkable synthetic polyisoprene (I) with an elongation of 150% under a tensile stress of at least 0.4 MPa, as measured by a defined test, is new. The test comprises making a 2.5 mm thick plate of (I) by compression molding at 110degreesC for 10 minutes in a mold between two sheets of polyester, cooling the plate under pressure for 16 hours, removing the plate from the mold, cutting the plate into a dumbell shape whose ends are connected by a shaft with a thickness of 2.5 mm, a length of 26 mm and a width of 6 mm, gripping the resulting test piece with a clamping pressure of 2 bar between the jaws of an Instron 4501 (RTM) tensile testing machine within 1 hour of removal from the mold, subjecting the test piece to traction at 23degreesC and 50% relative humidity with a jaw displacement speed of 100 mm/minute, and calculating the elongation as 100 times the jaw displacement divided by the initial shaft length and the tensile stress as the tractive force divided by the initial cross-sectional area of the test piece. An Independent claim is also included for production of (I) by polymerizing isoprene in bulk or in an inert hydrocarbon solvent using a catalyst comprising a conjugated diene monomer, a rare earth metal organophosphate suspended in a (cyclo)alkane solvent, a di- or trialkylaluminum alkylating agent and an alkyl aluminum halide halogen donor, and branching the product with a Lewis acid.
Inventors:
Roblie Philip
Bar Button Funny
Johnson Philip
Oger Jean Ryuk
Bar Button Funny
Johnson Philip
Oger Jean Ryuk
Application Number:
JP2004544192A
Publication Date:
February 02, 2006
Filing Date:
October 13, 2003
Export Citation:
Assignee:
Society Technology Michelin
Michelin Le Cherche et Technic Anonym
Michelin Le Cherche et Technic Anonym
International Classes:
C08F36/08; C08C19/00; C08F4/52; C08F4/60; C08F136/08
Domestic Patent References:
| JPS6023406A | 1985-02-06 | |||
| JPH0559103A | 1993-03-09 |
Attorney, Agent or Firm:
Sadao Kumakura
Nobuo Ogawa
Atsushi Hakoda
Kenji Asai
Koji Hirayama
Nobuo Ogawa
Atsushi Hakoda
Kenji Asai
Koji Hirayama