摘要:
A colour photographic material which contains on a support at least one blue-sensitive silver halide emulsion layer containing at least one yellow coupler, at least one green-sensitive silver halide emulsion layer containing at least one magenta coupler, at least one red-sensitive silver halide emulsion layer containing at least one cyan coupler, together with customary non-light-sensitive layers, characterized in that at least one layer contains a compound of formula (I) or (II) wherein the R1-radicals and R2-radicals are preferably methyl; and wherein the compounds of formula (II) are preferably (III) R3 is a radical —H(CH3)—X-D, wherein X is phenylene. D is a group (IV) or a group —C(O)—C1-C18alkyl or a group —O—CH2—CH(OH)—CH2—NR12R13, with R12 and R13 being C1-C18alkyl or together form a 4 to 8 membered ring as defined in claim 1, or D is a group —O—CH2—CH(OH)—CH2—N(R12)—CH2 CHOH—CH2—O— or —O—CH2—CH(OH)—CH2—W—CH2—CHOH—CH2—O— with W being a divalent amino group (—N(C1-C18alkyl)-), a polyamine residue, a polyethyleneimine residue or a polyoxyalkyleneamine residue; Z and Z′ are for example C1-C12alkyl, C3-C12alkenyl, C3-C12alkinyl, C5-C8cycloalkyl, or Z and Z′ together bivalent groups such as —CH2—CH2— or —CH2—C(R18)(R19)—CH(R20)—.
摘要:
The present invention relates to the use of 6, 7 and 8 membered heterocyclic alkoxyamines or their nitroxyl precursors, which have a high steric hindrance in the &agr;-position to the alkoxyamine group, as regulators/initiators which allow for very efficient and fast polymerization at higher temperatures, but that also work at relatively low temperatures such as for example 100° C. The higher steric hindrance may be introduced by at least one higher alkyl substituent than methyl in the &agr;-position to the alkoxyamine group. In many cases even higher hindrance by two, three or four higher alkyl groups may be advantageous.
摘要:
A description is given of compounds of the formula in which the general symbols are as defined in claim 1, and of their zirconium, bismuth and calcium salts, and of the salts with the compounds of the formula II in which the general symbols are as defined in claim 1, as corrosion inhibitors in coating compositions for protecting metallic surfaces.
摘要:
A process for preparing unsaturated nitriles of the formula I ##STR1## where R, R.sup.1 and R.sup.2 are each independently of one another alkyl or alkenyl each having 1-20 carbon atoms or cycloalkyl or cycloalkenyl each having 3-12 carbon atoms and any two of the radicals R, R.sup.1 and R.sup.2 may be part of a saturated or unsaturated ring and R.sup.1 and R.sup.2 may also be hydrogen and n is 0 or 1-20, by dehydration of oximes of the formula II ##STR2## where R, R.sup.1, R.sup.2 and n are as defined above, comprises dehydrating in the gas or liquid phase at from 150.degree. to 300.degree. C. over a heterogeneous catalyst consisting of an oxidic, carbidic or nitridic support doped with basic oxides and/or hydroxides or compounds which are converted into said oxides or hydroxides under the reaction conditions, or of said basic oxides.
摘要:
The invention relates to crystalline complex compounds of formula I ##STR1## wherein the general symbols are as defined in claim 1, as corrosion inhibitors in coating compositions for protecting metallic surfaces.
摘要:
There are described novel alkaline earth metal salts, transition metal salts and transition metal complexes of compounds of the formula I ##STR1## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are, independently of one another, hydrogen, halogen, nitro, cyano, CF.sub.3, C.sub.1 -C.sub.15 alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.2 -C.sub.15 alkenyl, C.sub.1 -C.sub.12 haloalkyl, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.12 alkylthio, C.sub.6 -C.sub.10 aryl which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl; C.sub.6 -C.sub.10 aryloxy which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl; C.sub.7 -C.sub.12 arylalkyl which is unsubstituted or substituted on the aryl radical by from 1 to 3 C.sub.1 -C.sub.4 alkyl groups; --CO.sub.2 R.sub.6, --COR.sub.6 or ##STR2## where at least one of the radicals R.sub.1 to R.sub.5 is hydrogen, halogen or C.sub.1 -C.sub.15 alkyl, in addition the radicals R.sub.1 and R.sub.2, R2 and R.sub.3, R.sub.3 and R.sub.4 or R.sub.4 and R.sub.5 form, together with the carbon atoms to which they are bound, a benzo or cyclohexenyl ring,R.sub.6 is C.sub.1 -C.sub.20 alkyl, C.sub.2 -C.sub.20 alkyl interrupted by oxygen, sulfur or >N--R.sub.9 ; C.sub.7 -C.sub.12 arylalkyl which is unsubstituted or substituted on the aryl radical by from 1 to 3 C.sub.1 -C.sub.4 alkyl groups, R.sub.7 and R.sub.8 are, independently of one another, hydrogen, C.sub.1 -C.sub.24 alkyl or C.sub.2 -C.sub.24 alkyl interrupted by oxygen, sulfur or >N--R.sub.9,R.sub.9 is hydrogen or C.sub.1 -C.sub.8 alkyl, andn is an integer in the range from 1 to 10 for use, as corrosion inhibitors in coating compositions for protecting metal surfaces.
摘要:
Bisimides of the formula I ##STR1## in which, for example, R.sup.1 is hydrogen, x is 1, y is zero and R is bis-(1,4-phenylene)-methane are intermediates for the preparation of polymers having excellent physical properties, and are suitable for the production of mouldings, coatings and adhesive joints and, in particular, for the production of prepregs and heat-resistant composite materials.
摘要:
Heat curable mixtures comprising(a) 5 to 95% by weight of at least one aromatic dicyanate or polycyanate compound or a prepolymer thereof,(b) 95 to 5% by weight of at least one compound of formula I or II ##STR1## or of a prepolymer of a compound of formula I or II, (c) 0 to 50% by weight, based on the sum of (a)+(b), of at least one compound of formula III ##STR2## (d) 0.1 to 50% by weight, based on the sum of (a)+(b), of at least one thermoplastic having a glass transition temperature of at least 120.degree. C., in which formulae aboveR.sub.1, R.sub.2 and R.sub.3 are each independently of one another a hydrogen atom or methyl,n is 1 or 2 and m is 2 or 3,R is hydrogen or an aliphatic, cycloaliphatic or aromatic radical, R' is an aliphatic radical, m- or p-phenylene or m- or p-phenyleneoxy, and R" is an organic radical or valency m containing 2 to 30 carbon atoms, are suitable for the production of mouldings such as prepregs or composites, coatings and bonds.
摘要:
The invention relates to compositions containing at least one epoxide adduct A that comprises an average of more than one epoxide group per molecule, at least one polymer B of formula (I), at least one thixotropic agent C based on a urea derivative in a non-diffusing carrier material, and at least one hardener D for epoxy resins, which is activated at an increased temperature. Said composition is used especially as an adhesive and is provided with an extraordinarily high impact peel working value, especially at low temperatures. The invention further relates to epoxide group-terminal impact strength modifiers of formula (I), which significantly increase the impact resistance in epoxy resin compositions, particularly two-component epoxy resin compositions.
摘要:
A heat-curing epoxy resin composition that includes an epoxy resin, a curing agent, an accelerator, and an optional toughener. The epoxy resin compositions are suitable in particular for use as bodyshell adhesives and for preparation of structural foams. An accelerator of formula (I) results in increased impact strength the of heat-curing epoxy resin compositions.