ADDITIVE FOR COMMUNICATION CABLE FILLER AND FILLER FOR COMMUNICATION CABLE

Title:

ADDITIVE FOR COMMUNICATION CABLE FILLER AND FILLER FOR COMMUNICATION CABLE

Document Type and Number:

WIPO Patent Application WO/2002/033710

Kind Code:

A1

Abstract:

An additive (b) for communication cable fillers which comprises as the main component an ethylene/a-olefin copolymer (a) having a number-average molecular weight (Mn) as measured by GPC of 500 to 5,000 and satisfying the following relationship (1) 0.501 x D (kg/m?3¿) - 366 = Tc ( °C) (1) between crystallization temperature (Tc (°C)) as measured by DSC (cooling rate, 2°C/min) and density (D (kg/m?3¿)) as measured by the density-gradient tube method; and a filler (c) for communication cables which is prepared by compounding X) 40 to 90 wt.% polybutene (d) having a number-average molecular weight of 200 to 2,400, Y) 1 to 50 wt.% oil (e), and Z) 1 to 15 wt.% the ethylene/a-olefin copolymer (a). The additive and filler are satisfactory in the efficiency of cable jelly filling and in oil retention.

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Inventors:

TOYODA HIDEO (JP)
OKAWA KAZUNORI (JP)

Application Number:

PCT/JP2001/009150

Publication Date:

April 25, 2002

Filing Date:

October 18, 2001

Export Citation:

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Assignee:

MITSUI CHEMICALS INC (JP)
TOYODA HIDEO (JP)
OKAWA KAZUNORI (JP)

International Classes:

H01B3/44; C08F210/16; (IPC1-7): H01B3/44; H01B7/18; C08F210/02; C08L23/08

Foreign References:

US6127441A	2000-10-03
EP0416815A2	1991-03-13
JPS58174429A	1983-10-13

Other References: