Impact polyamide composition containing grafted nitrogen compound

Claim 1

A thermoplastic composition comprising: (a) a normally solid polyamide and (b) an oil-soluble organonitrogen compound grafted hydrogenated conjugated diene/monovinylarene copolymer having a polymerized monovinylarene content of about 20 to 70 weight percent with the proviso that when said copolymer contains a random block, the block polymonovinylarene content is in the range of 15 to 35 weight percent, the extent of hydrogenation of said copolymer being such that about at least 95 weight percent of olefinic double bonds have been saturated and less than about 5 weight percent of aromatic double bonds have been saturated, said copolymer characterized as having been prepared by the process which comprises metalating a hydrogenated conjugated diene hydrocarbon/mono-vinylarene hydrocarbon copolymer, and reacting the resulting metalated hydrogenated copolymer with effective amounts of at least one nitrogen-containing organic compound represented by the general formula X--Q--(NR 2 3 ) n or Y[Q--(NR 2 3 ) n ] m wherein each R 2 3 is the same or different alkyl, cycloalkyl, aryl, or combination thereof, Q is a hydrocarbon radical having a valence of nand is a saturated aliphatic, saturated cycloaliphatic, aromatic or combination radical, X is a functional group capable of reaction on a one-to-one basis with one equivalent of polymer lithium, n is at least one, and m is 2 or 3, thereby preparing said grafted copolymer, said polymer of (b) being present in an amount within the range of (1) 15 to 50 weight percent based on the total weight of composition if used alone, or (2) if the polymer of (b) is used in combination with another hydrogenated conjugated diene/monovinylarene copolymer of the same type as that of (b) except for no organo-nitrogen compound being grafted thereto, the amount of the resulting combination is within the range of 20 to 50 weight percent based on the total weight of said composition, provided further that the amount of grafted copolymer when the polymers are used in combination times the weight percentage of nitrogen content equals at least 0.01 weight percent nitrogen based on the total weight of said thermoplastic composition.