Toughened polyamide compositions having improved properties

Details Toughened polyamide compositions having improved properties Toughened polyamide compositions having improved properties

C - Chemistry, Metallurgy

08

L

400/3038, 400/46

C08L 51/04 (2006.01) C08L 77/00 (2006.01)

Patent

CA 2006098

ABSTRACT Toughened polyamide compositions are produced by melt blending a polyamide component and a partially crosslinked elastomeric modifier component containing reactive functionalities. Generally a multiple phase composition is formed wherein the polyamide constitutes a continuous phase and the elastomeric modifier component constitutes a discontinuous phase having a particle size of at least 1.3 or 1.5 microns and preferably at least 5.0 microns. The discontinuous elastomeric modifier component is made by adding reactive functionalities to an existing elastomer polymer and partially or semi- crosslinking the same in the presence of free radical initiators such that at least 10 percent gel exists. The amount of the elastomeric modifier component is generally from about 1 to about 85 percent by weight. The poly- amide compositions have a wide range of improved proper- ties such as good low temperature (e.g., minus 40°C) impact resistance and good high temperature heat deflec- tion (e.g., 65°C).

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