The invention relates to a flame-resistant polyamide as a product of the condensation of dicarboxylic acids with diamines and with a flame-retardant phosphorus compound, which flame-resistant polyamide is characterized in that the flame-resistant polyamide FR contains, in the main chain thereof phosphinic acid amide structural units of formula (II) —PO(R1)—NH— (II) in addition to the amide structural units of formula (I) CO—NH— (I), in which formula (II) RI means hydrogen or an organic group and can differ in the individual phosphinic acid amide structural units within the main chain and that the polyamide FR achieves a relative viscosity, measured as a 1% solution in 96% sulfuric acid at 25° C., of at least 2.0 (in accordance with DIN 51562). The invention further relates to a method for producing said flame-resistant polyamide FR. In said method, one or more diamines are polycondensed with one or more dicarboxylic acids under pressure and at elevated temperature in the presence of water and with one or more diphosphinic acids and/or one or more phosphino-carboxylic acids by means of a polyamide synthesis. After the polycondensation, the pressure in the reaction chamber is reduced to less than 1 bar. The flame-resistant polyamide can be advantageously used to produce molded bodies, in particular films, components, and filaments or filament yarns.
本发明涉及一种阻燃聚酰胺,它是二
羧酸与二胺和阻燃
磷化合物缩合的产物,该阻燃聚酰胺的特征在于,阻燃聚酰胺 FR 的主链中除含有式(II)-PO(R1)-NH-(II)的酰胺结构单元外,还含有式(I)CO-NH-(II)的酰胺结构单元、在其主链中,除了式(I) CO-NH- (I)的酰胺结构单元外,还含有式(II) -PO(R1)-NH- (II)的
膦酸酰胺结构单元,其中式(II) RI 指氢或有机基团,在主链中的各个
膦酸酰胺结构单元可以不同。,的相对粘度至少为 2.0(符合 DIN 51562 标准)。本发明还涉及一种生产上述阻燃聚酰胺 FR 的方法。在该方法中,一种或多种二胺与一种或多种二
羧酸在加压和升温的条件下,在有
水和一种或多种
二膦酸和/或一种或多种膦
羧酸存在的情况下,通过聚酰胺合成法进行缩聚。缩聚后,反应室的压力降至 1 巴以下。阻燃聚酰胺可用于生产模塑体,特别是薄膜、部件、长丝或长丝纱线。