| 摘要 |
<p>A composite, such as a pre-preg or a laminate of layers of such a pre-preg, comprising therrnally stable continuous fibres, especially carbon or graphite flbres, optionally sized with amide-imide polyrner, and a resin matrix comprising… (I) an amide-imide copolyrner comprising recurring A min units of …<CHEM>… wherein the free carboxyl groups are ortho to one amide group, Z is a trivalent benzene ring or lower-alkyl-substituted trivalent benzene ring, R1 and R2 are different and are divalent aromatic hydrocarbon radicals of from about 6 to about 10 carbon atoms or two divalent aromatic hydrocarbon radicals of from about 6 to about 10 carbon atoms joined directly or by stable linkages selected from the group consisting of -O-, methylene, -CO-, -SO2-, and -S- radicals, alone or in combination with… (II) an amide-imide-phthalamide copolymer comprising units of: …<CHEM>… where R5 is the same as R1 and as R4, X is a divalent aromatic radical and Z is a trivalent benzene ring or lower-alkyl-substituted derivative thereof and R3 and R4 are different and may each be chosen from the choices given for R1 and R2,… and optionally (III) a polyetherimide;… and wherein optionally at least some of the free carboxylic acid groups in the repeating units are condensed with amide groups in the ortho position thereto to form imide groups.</p> |
