| 摘要 |
<p>The invention concerns hyperbranched copolyamides (HBPA), the method for obtaining them and their use as additive, in particular as melted viscosity modifier in thermoplastic polymer compositions. Said copolyamide is obtained by reacting a monomer (I): A-R-Bf where A and B = polymerisation functions of first and second types respectively, capable of reacting with each other; R = hydrocarbon entity and f = total number of B per monomer (preferably 2 ≤ f ≤ 10); with a monomer (II): A'-R'-B' or the corresponding lactams, where A', B', R' having the same definition as above respectively for A, B, R. Said HBPA has a I/II molar ratio such that 0.125 ≤ I/II ≤ 2. One of the entities R or R' of (I) or (II) is aliphatic, cycloaliphatic or arylaliphatic. For example: A = NH2 AND B = COOH or A = COOH and B = NH2 with F = 2. A' = NH2 and B' = COOH or A' = COOH and B' = NH2. A-R-B2, for example: 5-aminoisophthalic acid or 3,5-diaminobenzoic acid and A'-R'-B' = ε-caprolactam. The invention also concerns the yarns, fibres, moulded parts obtained from polymer compositions (for example, P.A) containing the inventive HBPA as additive.</p> |
