| 主权项 |
1. Reinforced polyamide molding materials with high notch impact strength, comprising low viscous polyamides and flat glass fibers as a reinforcing medium, consisting of
a polyamide matrix, consisting of the following components: (A) 0 to 60 wt.-% of at least one aliphatic, partly crystalline polyamide with a solution viscosity ηrel, measured in m-cresol (0.5 wt-%), of more than 1.3 and of less than 1.9, selected from the group consisting of polyamide 11, polyamide 12, polyamide 1212, polyamide 1010, polyamide 1012 and polyamide 1112, (B) 0 to 60 wt.-% of at least one amorphous or microcrystalline polyamide based on aliphatic, cycloaliphatic or aromatic diamines, dicarboxylic acids, lactams and/or aminocarboxylic acids, with 6 to 36 carbon atoms, or a mixture of such homopolyamides and/or copolyamides, with a solution viscosity ηrel, measured in m-cresol (0.5 wt-%), of more than 1.3 and less than 1.9, wherein the components (A) and (B) fulfil the condition:
(A)+(B)=20 to 60 wt.-% and that, in the case of a mixture of components (A) and (B), at least 50 weight parts aliphatic blocks (A) are present in the mixture, and a filler component, consisting of: (C) 40 to 80 wt.-% flat glass fibers with elongated shape, and the glass fibers have a non-circular cross-sectional area and a size ratio of the main cross-sectional axis to the secondary cross-sectional axis of between 2 to 5, and (D) 0 to 40 wt.-% particle like or layer like fillers, with the proviso that carbon fibers are excluded, wherein the polyamide molding materials optionally comprise up to 5 wt.-% of further usual additives and auxiliary agents (E), and wherein the weight of the components (A) to (E) sums up to 100%. |
