Patent ID: 7772329

Claim:
A toughened nylon, comprising: a matrix nylon; and a long-chain nylon, the matrix nylon is prepared by homopolymerization or copolymerization of cyclic lactam monomers or their corresponding amino acids, the structure of said cyclic lactam is represented by Formula (I) and the structure of said amino acid is represented by Formula (I′); in Formula (I) and (I′) A is an alkyl group including 1-8 carbon(s) and 3≦n≦11; the long-chain nylon is at least one selected from the group consisting of nylon-1010, nylon-1111, nylon-1212, nylon-1313, nylon-46, nylon-66, nylon-610, nylon-612, nylon-613, nylon-1011, nylon-1012, nylon-1213, nylon-8, nylon-9, nylon-11, nylon-12, nylon-13, poly(2,2,4-trimethyl hexamethylene terephthalamide), co-condensation nylon 6/7, co-condensation nylon 6/10, co-condensation nylon 6/12, co-condensation nylon 6/13, co-condensation nylon 10/11, co-condensation nylon 10/12, co-condensation nylon 12/13, nylon-6T and nylon-10T; and a proportion of said long-chain nylon in the total weight of the toughened nylon is 2-45%; as the toughened nylon has only one melting peak detected with differential scanning calorimetry.