摘要:
Wholly aromatic mesomorphic polyester imides which form a liquid-crystalline fiber-forming melt below 320.degree. C. and are composed of(a) from 5 to 35 mol % of repeat units of the formulae I and/or II ##STR1## where x can be identical or different and each is --O--, --S--, --SO.sub.2 --, --CO--, --CH.sub.2 -- or .dbd.C(CH.sub.3).sub.2, and n is 1 or 2,(b) from 0 to 30 mol % of repeat units of the formulae III and/or IV ##STR2## (c) a molar amount corresponding to the total amount of components (a) and (b) of repeat units(c1) from 3 to 35 mol % of units of the formula V ##STR3## and one or more of the repeat units. 2 (c2) from 2 to 25 mol % of units of the formula VI ##STR4## (c3) from 0 to 25 mol % of units of the formula VII ##STR5## (c4) from 2 to 25 mol % of units of the formula VIII ##STR6## the total of the molar proportions of components (c1), (c2), (c3) and (c4) corresponding in each case to the total in mol % of components (a) and (b),(d) if desired from 5 to 25 mol % of repeat units of the formula IX ##STR7## (e) repeat units of the formula X ##STR8## the molar proportions of (a), (b), (c), (d) and (e) in each case adding up to 100 mol %, the preparation thereof and fibers, films and molding prepared therefrom.
摘要:
Wholly aromatic mesomorphic polyester amides which form a liquid-crystalline fiber-forming melt below 320.degree. C., composed of(a) from 3 to 30 mol % of repeat units of the formula I ##STR1## (b) from 3 to 30 mol % of repeat units of the formula II and/or III ##STR2## (c) from 2 to 25 mol % of one or more of the repeat units of the formula IV, V or VI, ##STR3## (d) a molar amount corresponding to the total amount of components (a), (b) and (c) excluding the repeat unit of the formula III, of the repeat units of the formula VII ##STR4## which, if desired, can in part be replaced by repeat units of the formula VIII ##STR5## (e) if desired from 5 to 25 mol % of repeat units of the formula IX ##STR6## (f) repeat units of the formula X ##STR7## the molar proportions of components (a), (b), (c), (d), (e) and (f) in each case adding up to 100 mol %, and preparation thereof.
摘要:
Wholly aromatic mesomorphic polyester amides which form a liquid-crystalline fiber-forming melt below 320.degree. C. and are composed of(a) from 5 to 35 mol % of repeat units of the formula I ##STR1## (b) from 5 to 15 mol % of repeat units of the formula II ##STR2## (c) a molar amount corresponding to the total amount of components (a) and (b), and, when (e) signifies repeat units of the formula VI or VII, (e) of repeat units of the formula III ##STR3## (d) not less than 10 mol % of repeat units of the formula IV ##STR4## (e) from 2 to 15 mol % of repeat units of the formula V ##STR5## or of the formula VI ##STR6## the repeat units of the formula VI being replaceable in part by repeat units of the formula VII ##STR7## with the proviso that the molar proportions of components (a), (b), (c), (d) and (e) add up to 100 mol % in each case, the preparation thereof and fibers, films, molding and surface coating materials prepared therefrom.
摘要:
Wholly aromatic, mesomorphic polyesters which give a homogeneous liquid crystalline melt at below 320.degree. C. consist of(a) not less than 10 mol % of repeating units of the formula I ##STR1## (b) from 1 to 25 mol % of repeating units of the formula II ##STR2## (c) from 5 to 20 mol % of one or more of the repeating units of the formulae III to VII ##STR3## (d) from 5 to 15 mol % of repeating units of the formula VIII ##STR4## and (e) from 10 to 60 mol % of repeating units of the formula IX ##STR5## the sum of the molar amounts of (a), (b), (c), (d) and (e) being 100 mol % in each case and the molar ratio of the components (b)+(c)+(d) to component (e) being from 0.9:1 to 1.1:1.
摘要:
Wholly aromatic mesomorphic polyester amide imides which form a liquid-crystalline fiber-forming melt below 320.degree. C. and are composed of(a) from 5 to 35 mol % of repeat units of the formula I and/or II ##STR1## where X can be identical or different, each X being --O--, --S--, --SO.sub.2 --, --CO--, --CH.sub.2 -- or .dbd.C(CH.sub.3).sub.2, and n is 0 or 1(b) from 0 to 30 mol % of repeat units of the formulae III and/or IV ##STR2## (c) a molar amount corresponding to the total amount of components (a) and (b) of one or more of the repeat units V, VI, VII, VIII, IX or X in an amount of(c1) from 3 to 35 mol % of units of the formula V ##STR3## (c2) from 0 to 10 mol % of units of the formula VI ##STR4## (c3) from 2 to 25 mol % of units of the formula VII ##STR5## (c4) from 2 to 20 mol % of units of the formula VIII ##STR6## (c5) from 0 to 20 mol % of the units of the formula IX ##STR7## (c6) from 2 to 20 mol % of units of the formula X ##STR8## the total of the mole percentages of components (c1), (c2), (c3), (c4), (c5) and (c6) equalling in each case the total of the mole percentages of components (a) and (b);(d) not less than 10 mol % of repeat units of the formula XI ##STR9## (e) from 0 to 25 mol % of one or more of the repeat units of the formula XII, XIII or XIV ##STR10## the mole percentages of components (a), (b), (c), (d) and (e) adding up to 100 mol % in each case, the preparation thereof and fibers, films and moldings prepared therefrom.
摘要:
Wholly aromatic thermotropic polyesters are based on(A) 30 to 60 mol % of 4-hydroxybenzoic acid,(B) 20 to 35 mol % of terephthalic acid and(C) 20 to 35 mol % of a mixture of(C.sub.1) trimethylhydroquinone and(C.sub.2) resorcinolthe molar ratio of C.sub.1 :C.sub.2 being within the range from 0.4:1 to 0.7:1 and the molar ratio of B:C within the range from 0.9:1 to 1.1:1.
摘要:
Liquid-crystalline carbamyl-containing polycondensates composed of(a) aromatic hydroxycarboxylic and/or aminocarboxylic acids in which the hydroxyl and amino groups are not vicinal to the carboxyl group,(b) from 0.1 to 20 mol % of urea,(c) aromatic dihydroxy, diamino and/or hydroxy-amino compounds in which the hydroxyl and amino groups are not vicinal,(d) a molar amount equivalent to the total amount of components b and c of an aromatic dicarboxylic acid in which the carboxyl groups are not vicinal,the preparation thereof and fibers, films and moldings prepared therefrom.
摘要:
Wholly aromatic thermotropic polyesters are based on(A) from 25 to 60 mol % of a mixture of(A.sub.1) 4-hydroxybenzoic acid and(A.sub.2) 3-hydroxybenzoic acid, 4-aminobenzoic acid and/or 3-aminobenzoic acid or their chlorine, bromine, C.sub.1 -C.sub.8 -alkyl or C.sub.1 -C.sub.8 -alkoxy derivatives substituted in the nucleus, the molar ratio of A.sub.1 to A.sub.2 being from 5:1 to 41:1,(B) from 20 to 37.5 mol % of a mixture of(B.sub.1) terephthalic acid and(B.sub.2) isophthalic acid, the molar ratio of B.sub.1 to B.sub.2 being from 1.04:1 to 19:1, and(C) from 20 to 37.5 mol % of a mixture of(C.sub.1) hydroquinone and(C.sub.2) 4,4'-dihydroxydiphenyl, the molar ratio of C.sub.1 to C.sub.2 being from 0.1:1 to 2.67:1 and the molar ratio of B to C being from 0.9:1 to 1.1:1.
摘要:
Fully aromatic themotropic polyesters are based on(A) from 30 to 60 mol % of 4-hydroxybenzoic acid,(B) from 20 to 35 mol % of a mixture of(B.sub.1) terephthalic acid and(B.sub.2) isophthalic acid, the molar ratio of B.sub.1 to B.sub.2 being from 1.04:1 to 19:1, and(C) from 20 to 35 mol % of a mixture of(C.sub.1) hydroquinone,(C.sub.2) 4,4'-dihydroxydiphenyl and(C.sub.3) from 0 to 5 mol % of a dihydroxy compound of the general formula I ##STR1## where R and R' are each C.sub.1 -C.sub.4 -alkyl, halogen or aryl, n is 1, 2 or 3 and m is 0 or 1, the molar ratio of C.sub.1 to C.sub.2 being from 0.1:1 to 2.67:1 and the molar ratio of B to C being from 0.9:1 to 1.1:1.
摘要:
Fully aromatic mesomorphic polyesters which give a liquid crystalline filament-forming melt below 300.degree. C. consist of(a) from 5 to 25 mol % of repeating units of the formula I ##STR1## (b) from 5 to 25 mol % of repeating units of the formula II ##STR2## (c) from 10 to 50 mol % of repeating units of the formula III ##STR3## and (d) not less than 10 mol % of repeating units of the formula IV ##STR4## the sum of the molar amounts of components (a), (b), (c) and (d) being 100 mol %, and the molar ratio of components (a) and (b) to component (c) being from 0.9:1 to 1.1:1.