POLYMER COMPOSITIONS AND PROCESS OF TUBE PRODUCTION Russian patent published in 2008 - IPC C08L23/06 C08L23/08 C08F2/00 C08F10/02 C08F210/02 C08J5/00 F16L11/04

Abstract RU 2326904 C2

FIELD: chemistry.

SUBSTANCE: polymer composition contains low- and high-molecular polyethylene components, the composition basically having a single peak of lamella width percentile curve and PENT greater than 1000 hours at 80°C and 2.4 MPa according to ASTM F1473. The process has several variants allowing production of tubes with enough viscosity to resist shock during laying or afterward; and with extra long working life under gas or water pressure, especially resistant to environmental stress cracking and to creep under internal pressure.

EFFECT: higher impact elasticity and longer working life of tubes.

37 cl, 5 dwg, 3 tbl, 7 ex

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RU 2 326 904 C2

Authors

Zou Dzhimmi Z.

Michi Vill'Jam Dzh. Ml.

Dates

2008-06-20—Published

2003-06-04—Filed