申请人:Giba-Geigy Corporation
公开号:US04297480A1
公开(公告)日:1981-10-27
There are described transparent polyamides, and processes for producing them, which polyamides consist of recurring structural elements of the formula I ##STR1## or of recurring structural elements of the formula II ##STR2## [carbonyl groups in the structural elements (II) bound in the 1,3- and/or 1,4-position to the benzene nucleus, R.sub.1 =C.sub.1-12 -alkyl, R.sub.2 =H, C.sub.1-12 -alkyl, R.sub.3 =C.sub.1-12 -alkyl, C.sub.4-12 -cycloalkyl, C.sub.7-8 -aralkyl, unsubstituted or substituted aryl, R.sub.4 =H, C.sub.1-12 -alkyl, C.sub.4-12 -cycloalkyl, C.sub.7-8 -aralkyl, or unsubstituted or substituted aryl, or R.sub.3 /R.sub.4 together=C.sub.3-11 -alkylene, R.sub.5 /R.sub.6 independently of one another=hydrogen or methyl, and R.sub.7 /R.sub.8 together=C.sub.3-11 -alkylene]. The polyamides according to the invention are suitable for producing transparent moulded articles of the widest variety, and are distinguished in particular by low water absorption, high stability to hydrolysis, and/or good dimensional stability under the action of moisture or humidity.
本发明描述了透明聚酰胺及其生产方法,该聚酰胺由公式I的重复结构单元或公式II的重复结构单元组成,其中结构单元(II)中的羰基基团在1,3-和/或1,4-位置与苯环相结合,R1=C1-12烷基,R2=H、C1-12烷基,R3=C1-12烷基、C4-12环烷基、C7-8芳基烷基、未取代或取代的芳基,R4=H、C1-12烷基、C4-12环烷基、C7-8芳基烷基或未取代或取代的芳基,或R3/R4共同=C3-11亚烷基,R5/R6独立地=氢或甲基,R7/R8共同=C3-11亚烷基。本发明的聚酰胺适用于制造各种透明成型品,特别是具有低吸水性、高水解稳定性和/或在潮湿或湿度作用下具有良好的尺寸稳定性。