IP Library › Patent Application 18443482
Patent Application
App. No. 18/443,482

HIGH SPECIFIC GRAVITY GEOSYNTHETIC COMPRISING POLYPROPYLENE

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Patent No.
US None
App. No.
18/443,482
Abstract

The present disclosure provides a geosynthetic. In one embodiment, the geosynthetic contains a composition containing (A) a polypropylene and (B) from greater than 0 wt % to less than 3 wt % of a halogen-free flame retardant, based on the total weight of the composition. In another embodiment, the geosynthetic contains a composition containing (A) a polypropylene and (B) greater than 20 wt % zinc sulfide, based on the total weight of the composition. In another embodiment, the geosynthetic contains a composition containing (A) a polypropylene; (B) a halogen-free flame retardant; and (C) greater than 20 wt % zinc sulfide, based on the total weight of the composition. The composition has a specific gravity greater than 1.00 g/cc.

Claims (19)

1 . A method of making a geosynthetic, the method comprising:

combining, in a composition:

a polymer that consists of a polypropylene homopolymer;

a halogen-free flame retardant; and

greater than 20 wt % zinc sulfide, based on total weight of the composition; and

using the composition to form the geosynthetic;

wherein the composition has a specific gravity greater than 1.00.

2 . The method of claim 1 , wherein the composition has a specific gravity from 1.01 to 1.10.

3 . The method of claim 1 , wherein the geosynthetic has a specific gravity greater than 1.00.

4 . The method of claim 1 , wherein the composition is halogen-free.

5 . The method of claim 1 , wherein the composition comprises an additive having a specific gravity greater than 1.00.

6 . The method of claim 1 , wherein the halogen-free flame retardant is propanediamine.

7 . The method of claim 1 , wherein the geosynthetic is a geotextile comprising fibers comprising the composition.

8 . The method of claim 1 , wherein the geosynthetic has a burn rate of from 0 mm/sec to less than 100 mm/sec, as tested in accordance with FMVSS 302.

9 . The method of claim 1 , wherein the halogen-free flame retardant is in an amount from greater than 0 wt % to less than 20 wt %, based on total weight of the composition.

10 . The method of claim 9 , wherein the composition comprises from greater than 0 wt % to 3 wt % of the halogen-free flame retardant, based on the total weight of the composition.

11 . The method of claim 1 , wherein the composition is halogen-free.

12 . The method of claim 1 , wherein the geosynthetic is a woven or a nonwoven that comprises a filament, a fiber, a yarn, or a combination thereof, containing the composition.

13 . The method of claim 12 , wherein the filament, the fiber, the yarn, or the combination thereof, has a denier of from about 300 to about 5000.