Improved environmental stress crack resistance of hips

Details Improved environmental stress crack resistance of hips Improved environmental stress crack resistance of hips

C - Chemistry, Metallurgy

08

L

C08L 51/04 (2006.01) C08L 23/20 (2006.01)

Patent

CA 2140791

High impact polystyrene (HIPS) and other impact modified styrenic polymers such as ABS and MBS tend to suffer from environmental stress cracking. On extended exposure to oily or fatty substances the plastic tends to craze, then crack and finally break. Unfortunately, a number of applications for impact modified polymers is in areas where there is a high potential to contact with oily or fatty substances. The environmental stress crack resistance (ESCR) of impact modified styrenic polymers may be increased by increasing the particle size of the impact modifier and including a low molecular weight polybutene.

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