POLYETHYLENE, THERMOPLASTIC RESIN COMPOSITION CONTAINING THE SAME, AND PROCESS FOR PRODUCING POLYETHYLENE

WIPO Patent Application WO/1994/018250

A1

Polymers derived from ethylene monomers, which do not contain quaternary carbon in the main chain and have an activation energy (Ea) of melt flow of 8-20 kcal/mol, and wherein (1) the Huggins constant (k) and the limiting viscosity [eta] satisfy the relationship of the formula: k 0.2 + 0.0743 x [eta], or (2) the molar ratio of the methyl groups to the methylene groups in the molecular chain, [CH3/CH2], is 0.005 to 0.1 and satisfies the relationship of the formula: Tm 131 - 1340 [CH3/CH2], or (3) the Mw and the die swell ratio (DR) satisfy the ralationship of the formula: DR > 0.5 + 0.125 x log Mw, or (4) a beta-dispersion peak is present in a temperature range of 0 to - 100 �C in the loss modulus measurement. These polyethylenes are different from ordinary HDPE, L-LDPE and LDPE, and are characterized in that they are excellent in processability and capable of the control of various properties, such as density, melting point and crystallinity, mainly by polyethylene itself.

JPH0822887

[Title of Invention] A method for preparing a catalyst component and a catalyst system using the same.

MACHIDA SHUJI (JP)
SHIKUMA HARUO (JP)
HOSHINO AYAMI (JP)
TAKAKURA YUTAKA (JP)

PCT/JP1994/000168

August 18, 1994

February 04, 1994

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IDEMITSU KOSAN CO (JP)
MACHIDA SHUJI (JP)
SHIKUMA HARUO (JP)
HOSHINO AYAMI (JP)
TAKAKURA YUTAKA (JP)

C08F4/62; C08F8/04; C08F10/02; C08F110/02; C08F210/16; C08L23/04; C08L23/06; C08F4/639; C08F4/6392; (IPC1-7): C08F110/02; C08F4/62; C08F8/04; C08L23/06

JPH03163088A

1991-07-15

See also references of EP 0683184A4

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