High performance geosynthetic article

Details High performance geosynthetic article High performance geosynthetic article

2009-03-04

2010-11-30

Watkins, III, William P (Department: 1783)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

C264S171100, C264S171230

Reexamination Certificate

active

07842373

ABSTRACT:
Geotechnical article, and process for making it, the article having coefficient of thermal expansion less than about 150 ppm/° C. at ambient; resistance to acidic media greater than polyamide 6 resin and/or resistance to basic media greater than PET resin; resistance to hydrocarbons greater than that of HDPE; creep modulus of at least 400 MPa at 25° C., at 20% of yield stress load for 60 minutes (ISO 899-1); and 1 percent secant flexural modulus at least 700 MPa at 25° C. (ASTM D790); the article including a composition including (a) from about 1 to about 95% by weight of the composition of at least one functional group containing polymer or oligomer; and (b) from about 5 to about 99% by weight of the composition of at least one engineering thermoplastic, and optionally containing a filler and optionally containing an unmodified polyolefin, ethylene copolymer or ethylene terpolymer.

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patent: 5280066 (1994-01-01), Tekkanat et al.
patent: 6296924 (2001-10-01), Bach
patent: 6875520 (2005-04-01), Court et al.
patent: 2004/0102581 (2004-05-01), Dang et al.
patent: 0611849 (1994-08-01), None
patent: WO 9118150 (1991-11-01), None

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