| 摘要 |
22772-1130 This invention relates to a process for the preparation of a nylon block copolymer in which two or more reaction streams consisting of molten lactam are combined in a mould, said reaction streams containing one or more polyols, lactam blocked polyisocyanates and catalysts, and the catalysts and polyisocyanates being in different streams, which reaction, streams having a temperature of 68.degree.C - 95.degree.C introduced into a mould having a temperature of 100.degree.C - 180.degree.C. The advantage of this process is that now the polyol is homogeneously distributed throughout the nylon matrix, and as a consequence a nylon block copolymer with excellent notched resistance is obtained. |
