Polyimides prepared from disubstituted aromatic tetracarboxylic acid dianhydrides

Claim 2

A polyimide of at least one aromatic tetracarboxylic dianhydride and at least one aromatic diamine which comprises 5 to 100 mol % of at least one structural element of the formula I ##STR28## and 95 to 0 mol % of at least one structural element of the formula II ##STR29## wherein A is a direct bond or A is ##STR30## --SO 2 --, or C(CF 3 ) 2 ; R is independently halogen, OH, OR 1 , NO 2 , COOR 1 , CF 3 or (CF 2 ) 1-4 CF 3 and R 1 is C 1 -C 6 alkyl; Z is an unsubstituted or substituted tetravalent radical to which in each case two carbonyl groups are bonded in the ortho- or peri-position with the proviso that Z is not ##STR31## X is the divalent radical or an aromatic diamine.

Claim 3

The polyimide of claim 1, wherein A is the direct bond or A is ##STR32## --O-- or --SO 2 --.

Claim 4

The polyimide of claim 2, wherein A is ##STR33##

Claim 5

The polyimide of claim 1, wherein R is halogen or methoxy.

Claim 6

The polyimide of claim 4, wherein R is chlorine.

Claim 7

The polyimide of claim 1, wherein said dianhydride is 2,2'-dichloro-4,4',5,5'-benzophenonetetracarboxylic acid dianhydride.

Claim 8

The polyimide of claim 1, wherein X is a divalent, mono- or polynuclear C 6 -C 22 arylene radical.

Claim 9

The polyimide of claim 1, wherein X is a phenylene radical.

Claim 10

A polyimide according to claim 1, in which an aromatic radical X has the formulae III, IIIa or IIIb ##STR34## in which, in formula III, the free bonds are in the meta- or para-position relative to one another, in formula IIIa the free bonds are in the meta-or para-position relative to the R 11 group and R 5 and R 6 are bonded in the two ortho-positions of the free bond, and in formula IIIb the free bonds are in the 2-,3-,6- or 7-positions and R 5 and R 6 are in the two ortho-positions of the free bonds, R 11 is a direct bond or R 11 is --O--, --S--, --SS--, --SO--, --SO 2 --, --CO--, --COO--, --NH--, ##STR35## with 1 to 6 C atoms in the alkyl ##STR36## --CONH--, --CON-alkyl- with 1 to 6 C atoms in the alkyl, --CON-phenyl-, --CON-benzyl-, ##STR37## in which Y is ##STR38## and R 17 is a hydrogen atom, C 1 -C 6 -alkyl or phenyl, linear or branched alkylene with 1 to 3 C atoms, alkylidene which has 2 to 12 C atoms and is unsubstituted by Cl or F, cycloalkylidene with 5 or 6 ring carbon atoms, phenylene, phenylenedioxy or the group ##STR39## in which R 3 and R 4 are alkyl or alkoxy with 1 to 6 C atoms, phenyl, benzyl, phenoxy or benzyloxy, r is a number from 1 to 10, t is 0 or 1, s is 0 or 1, R' is --O-- or --S--, Q is C 1 -C 6 -alkylene and q is a number from 1 to 100 R 5 and R 6 are alkyl or alkoxy with 1 to 12 C atoms, alkoxyalkyl with 2 to 12 C atoms, cyclopentyl, cyclohexyl or benzyl, or, in the formula III or IIIa R 5 and R 7 are bonded in adjacent positions and together are trimethylene or tetramethylene, in which case R 6 is hydrogen, alkyl or alkoxy with 1 to 12 C atoms, alkoxyalkyl with 2 to 12 C atoms, cyclopentyl, cyclohexyl or benzyl a hydrogen atom, or R 7 and R 8 are hydrogen atoms or independently have the meanings of R 5 and R 6 , and R 9 and R 10 are hydrogen atoms or independently have the meanings of R 5 and R 6 , or R 7 and R 9 in formula IIIa together are trimethylene or tetramethylene.

Claim 11

A polyimide according to claim 9, in which X in formula I is a radical of the formula ##STR40## in which the free bonds are in the meta- or para-position relative to one another, or of the formula ##STR41## in which R 5 and R 6 independently of one another are methyl, ethyl, n-propyl or isopropyl, R 7 and R 8 are hydrogen atoms or have the meaning of R 5 , or R 5 and R 7 together are trimethylene or tetramethylene and R 6 and R 8 are hydrogen atoms, and R 11 is a direct bond or R 11 CH 2 or CO.

Claim 12

A polyimide according to claim 1, in which x has the formula ##STR42## in which R 5 , R 6 , R 7 and R 8 are hydrogen or one free bond is in the 4'- or 5'-position and the other is in the 3-, 4- or 5-position and R 5 and R 6 or R 7 and R 8 are in the ortho-positions of the free bond and are alkyl or alkoxy with 1 to 12 C atoms or alkoxyalkyl with 2 to 12 C atoms.

Claim 13

A polyimide according to claim 1, in which Z is ##STR43## in which R o is a direct bond or R o is a bridge group of the formula ##STR44## in which R 2 , R 3 and R 4 are alkyl with 1 to 6 C atoms, phenyl or benzyl, and R 3 and R 4 are also alkoxy with 1 to 6 C atoms, phenoxy or benzyloxy.

Claim 14

A polyimide according to claim 12, in which Z is a radical of the formula ##STR45## in which R o is a direct bond or R o --O--, --SO 2 --, --CH 2 -- or --CO--.

Claim 15

A polyimide according to claim 13, in which Z is a radical of the formula ##STR46## or mixtures thereof.

Claim 16

A polyimide according to claim 1 which contains 100 mol % of structural elements of the formula I.

Claim 17

The polyimide of claim 15, wherein A is ##STR47## and each R is chlorine.

Claim 18

The polyimide of claim 16, wherein X is a mixture of the divalent radicals from diaminophenylindane and 3,5-diaminobenzoic acid.

Claim 19

The polyimide according to claim 1 which contains elements of both formula (I) and formula (II).

Claim 20

The polyimide of claim 18, wherein A is ##STR48## each R is chlorine and Z is ##STR49##

Claim 21

A process for the preparation of polyimides according to claim 1, which comprises subjecting at least one compound of the formula (I) of claim 1 or at least one compound of the formula I of claim 1 together with at least one tetracarboxylic dianhydride of the formula ##STR50## to a polycondensation reaction with at least one diamine of the formula H 2 N--X--NH 2 , when X and Z are as defined in claim 1, and then cyclizing the formed polyamide acid with heat or heat and a dehydrating agent.

Claim 22

A coated substrate comprising a carrier material onto which a coating of polyimide according to claim 1 is applied.

Claim 23

The coated substrate of claim 21, wherein said polyimide contains at least 30 mol % of a divalent radical derived from aromatic diamines containing acidic or phenolic functionalities and an effective dissolution inhibiting amount of a dissolution inhibitor for said polyimide.

Claim 24

A polyimide according to claim 7, wherein X is a radical of the formula ##STR51## wherein R 11 is a direct bond, --O--, --CO-- or --CH 2 -- and R 12 is hydrogen, methyl, ethyl, isopropyl, methoxy, hydroxy or carboxy.