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US 9,518,176 B2Granted
High temperature geomembrane liners and master batch compositions
AssigneeGSE Environmental, LLC
InventorsYongyoot Prachoomdang, Yin Wu
Life of this patent
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Abstract
Geomembrane liners suitable for use at elevated temperatures up to 100° C., as well as master batch compositions suitable for preparing such geomembrane liners.
Claims11
A composition for preparing a geomembrane liner for a containment system, wherein said composition is of:
- 1) a master batch;
- and 2) a base resin and wherein said composition comprises:
- i) about 8-10 wt % of a master batch composition comprising
- a) about 70 to about 80 wt % of a Linear Low Density Polyethylene (LLDPE), Medium Density Polyethylene (MDPE), High Density Polyethylene (HDPE), or Polyethylene of Raised Temperature (PERT) resin carrier has density from 0.910 to 0.955 g/cm3;
- b) about 1 to about 3 wt % of a primary antioxidant, wherein said primary antioxidant comprises 1,3,5-trimethyl-2,4,6-tris-(3,5-di-t-butyl-4-hydroxybenzyl) benzene;
- c) about 0.1 to about 0.5 wt % of a secondary antioxidant, wherein said secondary antioxidant comprises pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate);
- d) optionally, about 0.1 to about 0.5 wt % of tris (2,4-di-tert-butylphenyl) phosphite;
- e) about 1 to about 3 wt % of a UV stabilizer, wherein said UV stabilizer comprises a hindered amine light stabilizer;
- f) about 0.1 to about 0.5 wt % of an acid neutralizer;
- and
- g) about 20 to about 30 wt % of a carbon black, wherein said carbon black is a furnace carbon black, and wherein the percentages by weight add up to 100% and are based on the total weight of the master batch composition;
- and
- ii) about 90 to about 92 wt % of a base resin composition comprising Polyethylene of Raised Temperature (PERT) base resin, wherein the percentage by weight is based on the total weight of the geomembrane composition.
10 more elements
A master batch composition comprising
- a) about 70 to about 80 wt % of a Linear Low Density Polyethylene (LLDPE), Medium Density Polyethylene (MDPE), High Density Polyethylene (HDPE), or Polyethylene of Raised Temperature (PERT) resin carrier has density from 0.910 to 0.955 g/cm3;
- b) about 1 to about 3 wt % of a primary antioxidant, wherein said primary antioxidant comprises 1,3,5-trimethyl-2,4,6-tris-(3,5-di-t-butyl-4-hydroxybenzyl) benzene;
- c) about 0.1 to about 0.5 wt % of a secondary antioxidant, wherein said secondary antioxidant comprises pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate);
- d) optionally, about 0.1 to about 0.5 wt % of tris (2,4-di-tert-butylphenyl) phosphite;
- e) about 1 to about 3 wt % of a UV stabilizer, wherein said UV stabilizer comprises a hindered amine light stabilizer;
- f) about 0.1 to about 0.5 wt % of an acid neutralizer;
- and
- g) about 20 to about 30 wt % of a carbon black, wherein said carbon black is a furnace carbon black, and wherein the percentages by weight add up to 100% and are based on the total weight of the master batch composition.
5 more elements
Dependencies are inferred from the claim text.