| 摘要 |
1,164,582. Polyalkylene imine-polycarbonamide graft copolymer. ALLIED CHEMICAL CORP. 11 Jan., 1968 [11 Jan., 1967], No. 1717/68. Heading C3R. A graft copolymer comprises a linear polyalkyleneimine backbone with polycarbonamide side chains pendant from some or all of the imino nitrogen atoms. The polyimine should have no more than 5 chain carbon atoms between the nitrogen atoms, and the repeating unit of the carbonamide may have 3 to 18 atoms between the amido nitrogen atom and carbonyl group; the side chains having a number average molecular weight of at least 500 but not greater than half the average molecular weight of the polyimine. The backbone polymer is preferably a polyethyleneimine of molecular weight at least 20,000 and up to 500,000; substituted ethylene imines may also be used. The grafting may be effected by polymerizing a lactam in admixture with the polyimine using an acidic catalyst, or by preforming the polycarbonamide and heating with the polyimine in the presence of a strong acid, e.g. an acid of phosphorus. The latter method may be used with N-acyl polyimines obtained by polymerizing oxazolines. The copolymers may be modified by reacting the amino end groups with, for example, carboxyl groups, or with difunctional compounds such as diisocyanates to give cross-linking. They may be mixed with additives, e.g. titanium dioxide, 2,9-dimethyl quinacridone pigment, manganese compound/ hypophosphorous acid light stabilizer, copper compound/phosphorus compound/halogen compound heat stabilizer, glass fibres, carbon black, molybdenum disulphide, flame retardants and other polymeric materials such as polyethylene, PTFE, PVC, polyethylene terephthalate and polycarbonamides. The copolymers alone or as blends with fibre-forming polymers may be drawn into oriented filaments. |
