| 摘要 |
Polyamide compositions comprising: (a) at least one polyamide resin of number average molecular weight of at least 5000; and (b) at least one block polymer having (i) from about 30 to about 70 weight percent polyamide segments selected from <IMAGE> wherein x is an integer equal to five or more and y is an integer equal to three or more; (ii) from about 70 to about 30 weight percent of segments having a molecular weight of at least 300 selected from the group consisting of segments of poly(ethylene oxide), poly(propylene oxide), polycaprolactone, polytetrahydrofuran, polybutadiene, polyisoprene, polyisobutylene, poly(C1-C8 alkylene acrylate), poly(C1-C4 dialkylene siloxane), poly(ethylene-co-propylene), poly(ethylene-co-carbon monoxide) and combinations thereof; said (ii) segments being connected to an (i) polyamide segment through groups selected from amide, ester, urea, carbamate and imide; and (iii) greater than 0.05 milliequivalents of <IMAGE> groups per gram of (b); wherein Y and Z are alkylene having from about 3 to about 14 carbon atoms and X is arylene or alkylene having from about 3 to about 14 carbon atoms; provided that the composition contains from about 10 to about 90 weight percent of Component (a) and from about 90 to about 10 weight percent of Component (b).
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