Chemical Resistance Guide PP

This Chemical Resistance Guide contains an overview of the chemical properties of the products used in the polypropylenes business. Searching our database can be done by using the text search. All relevant matches for your query will be returned. Alternatively you can browse the terms starting with a specific letter you choose.

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Explanation

The following tables give information on chemical resistance of polypropylene, the so called Environmental Stress Cracking Resistance (ESCR).

The factor evaluated is the resistance to chemical attack during exposure to particular media at 20°C and 60°C.

Several factors affect the actual ESCR, such as:

  • Temperature
  • Concentration
  • Contact time between polypropylene and the medium
  • Presence of internal stress
  • Wall/film thickness

The qualifications given in the tables hold for SABIC® PP grades (hompolymer, impact copolymer and random copolymer) in general. The particular grade to be chosen depends on the application, and it will often be seen that the actual performance is better than indicated in the tables.


Chemicals Concentration (wt%) Resistance to chemical attack of PP Remarks
+20°C +60°C
Z
Zinc, salts inorganic + + Sat. Sol.

 

Legend
Symbol Meaning Notes
+ Good The medium has no effect
o Doubtful Application of PP as packaging material could have limitations regarding resistance to chemical attack by the packed content
- Unsuitable Is not recommended to expose PP to this medium
Sol.   Aqueous solution at a concentration higher than 10%, but not saturated
Sat.Sol.   Saturated aqueous solution, prepared at 20°C
Work.Sol.   Working solution of the concentration usually used in the industry concerned
Tg-s   Technical grade, solid
Tg-l   Technical grade, liquid
Tg-g   Technical grade, gas

 

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