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High performance geosynthetic article

A product and performance technology, applied in the field of high-performance geosynthetic products, can solve problems such as medium strength, high creep tendency, high CTE, etc.

Inactive Publication Date: 2012-11-14
PRS MEDITERRANEAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these CCSs are also characterized by the following drawbacks: they have moderate strength, high CTE, high tendency to creep (especially at temperatures above 40°C), and they are sensitive to hydrocarbons (more specifically fuels and oil) is chemically sensitive
High flexibility, which is an advantage in flexible geomembranes, becomes a disadvantage in CCS: when a load is applied on the CCS supporting the GRM, the composite structure formed by the above two components interacts with the load as an integrated system
There is heretofore an unmet need for these compositions and materials made therefrom

Method used

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Examples

Experimental program
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Effect test

example 1

[0290] Example 1: Compatibilized polymer compositions according to the invention, and strips and welded strips formed therefrom.

[0291] Step 1: Functionalization of HDPE

[0292] 1000 g of polyethylene resin Dowlex manufactured by DOW TM , 1.2 grams of dicumyl peroxide and 15 grams of maleic anhydride dry mix. The mixture was fed into the main hopper of a co-rotating twin-screw extruder with a screw speed of 100 to 200 RPM and an aspect ratio L / D of 40, and melt-kneaded at 180°C to 220°C until a functionalized polymer was obtained . This polymer is used as self-compatibilizer in this example and is denoted MA-PE.1 in the following.

[0293] Step 2: Compounding of Hydrolysis Stabilizing and UV Protecting Compounds

[0294] 500 grams of MA-PE.1, 500 grams of PA6 resin Ultramid manufactured by BASF TM B50L01 was put into a co-rotating twin-screw extruder with a screw speed of 100-300 RPM and an aspect ratio L / D of 40, and melt-kneaded at 280°C. 180 grams of Talc Iotalk Su...

example 2

[0301] Example 2: Composition according to US Patent No. 6,875,520, its strips and welded strips (which serve as comparative examples, not examples according to the invention).

[0302] Step 1: Functionalization of Ethylene-Methyl Acrylate Copolymer

[0303] 1000 grams of ethylene-methyl acrylate copolymer Lorty made by Arkema TM 29MA03, 1.2 grams of dicumyl peroxide and 15 grams of maleic anhydride were dry blended. The mixture was put into a co-rotating twin-screw extruder and melt-kneaded at 220° C. until a functionalized polymer was obtained. This polymer is used in this example as a self-compatibilizer, which is denoted hereinafter as MA-LOT.1.

[0304] Step 2: Compounding of PA-MA.LOT.1 compound

[0305] 500 grams of MA-LOT.1, 500 grams of PA6 resin Ultramid manufactured by BASF TM B50L 01 was put into a co-rotating twin-screw extruder, and melt-kneaded at 280°C. The compound was extruded and then pelletized by a strand pelletizer and dried at 45°C.

[0306] The r...

example 3

[0314] Example 3: Compatibilized polymer composition according to the invention, its strips and welded strips with improved thermal stability and improved puncture resistance at -20°C

[0315] Step 1: Compounding of Hydrolysis Stabilizing and UV Protecting Compounds

[0316] 200 grams of LLDPE made by Bondyram 4001 maleated by Polyram, LLDPE resin LL1001 made by 200 grams of ExxonMobil TM , 300 grams of Exact manufactured by ExxonMobil TM 203 elastomer, 300 grams of secondary crushed PET obtained from beverage bottles, 2 grams of heat stabilizer Irganox manufactured by Ciba TM B900, 5 grams of CYASORB manufactured by Cytec Corporation TM UV-4042 and 5 grams of Tinuvin manufactured by Ciba TM 494, put into a co-rotating twin-screw extruder, and melt kneaded at 280°C. The compound was extruded, pelletized by a strand pelletizer, and dried at 45°C.

[0317] The resulting product (hereinafter referred to as CB.3) was extruded to form a strip 1.5 mm thick and 150 mm wide.

...

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Abstract

Geotechnical article, and process for making it, the article having coefficient of thermal expansion less than about 150 ppm / DEG 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 DEG 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 DEG 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 afiller and optionally containing an unmodified polyolefin, ethylene copolymer or ethylene terpolymer.

Description

[0001] Cross references to related patent applications [0002] This application is related to the following patent applications: U.S. Patent Application No. (PRSI 200002), filed concurrently and titled "UVRESISTANT MULTILAYERED CELLULAR CONFINMENT SYSTEM"; U.S. Patent Application No. (PRSI 200003), filed concurrently and titled "GEOTECHNICAL ARTICLES"; and U.S. Provisional Patent Application No. (PRSI 200005) entitled "WELDING PROCESS ANDGEOSYNTHETIC PRODUCTS THEREOF"; and U.S. Provisional Patent Application No. (PRSI 200006) filed concurrently and entitled "PROCESS FORPRODUCING COMPATIBILIED POLYMER BLENDS." All four of these patent applications are incorporated herein by reference in their entirety. Background technique [0003] The present invention relates to high performance geosynthetic articles, such as reinforcement tapes, reinforcement elements, reinforcement membranes, especially dimensional stable cellular confinement systems. In particular, the present invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/00
CPCC08F8/00C08L23/16C08L67/02C08L23/0853C08L23/08C08L51/06C08L23/0869C08L53/00C08F10/00C08L2666/18C08L2666/20C08L2666/24C08L2666/14C08L2666/02B32B27/32B29D22/00B29K2023/00B82Y30/00
Inventor 伊扎尔·哈拉米奥德艾德·埃雷兹阿迪·埃雷兹
Owner PRS MEDITERRANEAN
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