Abstract: Benzophenone iminodiimides of the formula I ##STR1## which Y denotes hydroxyl or carboxyl, R.sub.1 denotes the optionally substituted radicals alkylene, phenylene or benzylidene, R.sub.2 denotes the radicals OH, substituted or unsubstituted alkyl or NH--CO--NHR.sub.3 and R.sub.3 denotes the radicals H, alkyl, phenyl or benzyl, processes for their preparation and polymers prepared therefrom.

Abstract: Benzophenone iminodiimides of the formula I ##STR1## in which Y denotes hydroxyl or carboxyl, R.sub.1 denotes the optionally substituted radicals alkylene, phenylene or benzylidene, R.sub.2 denotes the radicals OH, substituted or unsubstituted alkyl or NH--CO--NHR.sub.3 and R.sub.3 denotes the radicals H, alkyl, phenyl or benzyl, processes for their preparation and polymers prepared therefrom.

Abstract: Bismaleimides of the formula I ##STR1## wherein R denotes a radical of the formula II ##STR2## and polyimides which can be prepared from these bismaleimides, if appropriate with the addition of an aromatic diamine. The polyimides are optionally reinforced with fibers.

Abstract: Soluble and/or fusible polyimides or polyamidoimides of the general formula I ##STR1## in which R denotes a divalent radical of the formula II ##STR2## Ar denotes trivalent or tetravalent aromatic radicals or mixtures thereof, X denotes the amide radical, if Ar is trivalent, and if Ar is tetravalent denotes the imide radical and R.sub.1 denotes divalent aromatic radicals, and a process for their preparation.

Abstract: Bismaleimides of the formula I ##STR1## wherein R denotes a radical of the formula II ##STR2## and polyimides which can be prepared from these bismaleimides, if appropriate with the addition of an aromatic diamine. The polyimides are optionally reinforced with fibers.

Abstract: Aromatic tetracarboxylic acids or derivatives thereof of the general formula I ##STR1## in which R denotes a divalent radical of the formula II ##STR2## Ar denotes tri- or tetravalent aromatic radicals or mixtures thereof, X, if Ar is trivalent, denotes an amide radical, and if Ar is tetravalent denotes an imide radical, and Y and Z either together denote the anhydride radical --CO--O--CO-- or by themselves and independently of one another denote the radicals --COOH, --COCL or --COOR.sub.1, and a process for their preparation.

Abstract: Soluble and/or fusible polyamidoimide-polyimide block copolymers with high heat stability, useful e.g. as molding powders for thermoplastic shaping films, fibers and laminates and process for their preparation are provided.

Abstract: New crosslinkable bis-imidyl derivatives are described which can be produced by reaction of imidylphthalic acid derivatives, such as maleimidyl-phthalic acid anhydrides, with monomeric, oligomeric or polymeric diamines. The new crosslinkable bis-imidyl derivatives can be used for producing crosslinked polymers which are distinguished, in particular, by their stability to oxidation and to heat.

Abstract: The Si-modified bis-phthalic acid derivatives according to the invention are monomeric, oligomeric or polymeric compounds. An example of a monomeric compound of the invention is the amidoacid of the formula ##STR1## which is formed by reacting 4,4'-diaminodiphenylmethane and 4-N,N'-bis-[3-tri-n-propoxy)-silyl-propyl]-aminophthalic anhydride in solution, in a molar ratio of 1:2. To produce oligomeric or polymeric compounds, the reaction has to be carried out with a 3rd component, for example pyromellitic dianhydride.The products are used as adhesion promoters, for example between inorganic solids and organic resins.

Abstract: New crosslinkable bis-imidyl derivatives are described which can be produced by reaction of imidylphthalic acid derivatives, such as maleimidyl-phthalic acid anhydrides, with monomeric, oligomeric or polymeric diamines. The new crosslinkable bis-imidyl derivatives can be used for producing crosslinked polymers which are distinguished, in particular, by their stability to oxidation and to heat.

Abstract: The invention relates to Si-modified phthalic acid derivatives (acids, esters and anhydrides) of the formula I ##STR1## in which R.sub.1 and R.sub.2 independently of one another are --OH, alkoxy with 1-12 C atoms or phenoxy or R.sub.1 and R.sub.2 together are the --O--group, X is a ##STR2## R.sub.3 is alkyl with 2-7 C atoms, cycloalkyl with 5-7 C atoms, benzyl or ##STR3## Q is methyl, phenyl or --OQ.sub.3 and Q.sub.1, Q.sub.2 and Q.sub.3 independently of one another are alkyl with 1-6 C atoms or phenyl.The products of the invention are prepared by reacting the corresponding allylamino-phthalic anhydrides or allylamino-phthalic acid esters with compounds of the formula III ##STR4## They are used as adhesion promoters, for example between inorganic solids and organic resins. They may also be used for the preparation of other Si-modified adhesion promoters, and as curing agents for epoxide resins.

Abstract: The compounds according to the invention have the formulae Ia or Ib ##STR1## in which Y is a divalent organic radical and Z is --NH.sub.2, --NH-alkyl having 1-4 C atoms, --OH, --COOH, --COCl, --O--CO--CH.dbd.CH.sub.2, ##STR2## --COO--CH.dbd.CH.sub.2 or --O--CH.dbd.CH.sub.2. These novel 3- or 4-azidophthalic acid derivatives may be used for the preparation of photo-crosslinkable polymers. Compared to corresponding photosensitive polymers of the prior art, these novel polymers have the advantages that they are even more photosensitive and that they also absorb in the long wavelength UV region (at wavelengths greater than 320 nm).

Abstract: New imidyl-benzene-dicarboxylic and -tricarboxylic acid derivatives, in particular 5-maleimidyl-trimellitic acid derivatives and 3,5-bis-(maleimidyl)-phthalic acid derivatives, and a process for their manufacture are described. These imidylbenzene-dicarboxylic and -tricarboxylic acid derivatives are suitable for the manufacture of crosslinkable polymers, above all polycondensation and polymerization products, which are distinguished by good processability and good solubility in customary organic solvents. Imidyl compounds, according to the definition, which have anhydride groups can also be used as curing agents for optionally modified epoxide resins.

Abstract: New crosslinkable bis-imidyl derivatives are described which can be produced by reaction of imidylphthalic acid derivatives, such as maleimidyl-phthalic acid anhydrides, with monomeric, oligomeric or polymeric diamines. The new crosslinkable bis-imidyl derivatives can be used for producing crosslinked polymers wich are distnguished, in particular, by their stability to oxidation and to heat.

Abstract: New imidyl-benzenedicarboxylic acid derivatives, in particular 5-maleimidyl-isophthalic acid derivatives and 5-(nadic acid-imidyl)-isophthalic acid derivatives, and a process for their manufacture are described. These imidyl-benzenedicarboxylic acid derivatives are suitable for the manufacture of crosslinkable polymers, above all polycondensation and polymerization products, which are distinguished by good processability and good solubility in the customary organic solvents.

Abstract: 4-Siloxy derivatives of sterically hindered piperidines are effective light-stabilizers for plastics. These compounds have at least five alkyl groups in the ring positions 2, 3, 5 and 6 and four alkyl groups in ring positions 2 and 6, preferably methyl and ethyl groups. The ring nitrogen may be unsubstituted or substituted with a monovalent organic residue. The new compounds can be synthesized by O-silylation of 4-hydroxy-polyalkylpiperidines, preferably by reaction with chlorosilanes.

Abstract: The compounds according to the invention are Si-modified imidyl-phthalic acid derivatives of the formula ##STR1## and the corresponding cyclized imide derivatives; in the formula, A is a radical which completes to a substituted or unsubstituted imidyl group, R is a divalent organic radical, R.sub.1 and R.sub.2 are each hydrogen or a monovalent organic radical and Q, Q.sub.1 and Q.sub.2 are each a monovalent organic radical. A typical example is 3-dimethylmaleimidyl-phthalic acid N-(di-n-propoxymethylsilyl)propylimide, which is obtained by reacting 3-dimethylmaleimidyl-phthalic acid N-allylimide and di-n-propoxymethylsilane in solution, followed by cyclization. The products are used as adhesion promoters, for example between inorganic solids and organic resins.

Abstract: 4-Siloxy-derivatives of sterically hindered piperidines are good light-stabilizers for organic polymers, especially for polyolefins. The stabilizers are added in an amount of from 0.01 to 5% by weight, preferably 0.02 to 1% by weight based on the polymer. The new compounds are obtainable by O-silylation of the corresponding 4-hydroxypiperidines.

Abstract: The invention relates to Si-modified phthalic acid derivatives (acids, esters and anhydrides) of the formula I ##STR1## in which R.sub.1 and R.sub.2 independently of one another are --OH, alkoxy with 1-12 C atoms or phenoxy or R.sub.1 and R.sub.2 together are the --O-- group, X is a ##STR2## R.sub.3 is alkyl with 2-7 C atoms, cycloalkyl with 5-7 C atoms, benzyl or ##STR3## Q is methyl, phenyl or --OQ.sub.3 and Q.sub.1, Q.sub.2 and Q.sub.3 independently of one another are alkyl with 1-6 C atoms or phenyl.The products of the invention are prepared by reacting the corresponding allylamino-phthalic anhydrides or allylamino-phthalic acid esters with compounds of the formula III ##STR4## They are used as adhesion promoters, for example between inorganic solids and organic resins. They may also be used for the preparation of other Si-modified adhesion promoters, and as curing agents for epoxide resins.

Abstract: The invention relates to new imidyl compounds of the formula Ia and isoimidyl compounds of the formula Ib ##STR1## IN WHICH A denotes a divalent organic radical, especially an ethenylene, ethylene or propylene group. These compounds serve as curing agents for epoxide resins and give cured products with good mechanical and electrical properties.