摘要:
A process for the preparation of aromatic carbonyl or sulfonyl compounds with a diaryl ether structure by reacting phenols with halogenated carbonyl- or sulfonylaromatic compounds in a dipolar aprotic solvent is carried out in the presence of catalytic amounts of alkali metal nitrite or an aromatic nitro, nitroso, azo, azoxy or hydrazo compound.
摘要:
A process for preparing polyaryl ethers of the formula I or Ia ##STR1## by condensation of at least one appropriate bisphenol with at least one appropriate aromatic dichloride in the presence of an alkali metal carbonate in a dipolar aprotic solvent, is carried out in the presence of a catalyst selected from the alkali metal nitrites and the group of compounds of the formula II ##STR2## where r.sup.1 and r.sup.3 are each hydrogen, C.sub.7 -C.sub.16 -phenylalkyl, C.sub.1 -C.sub.12 -alkoxy, fluorine, chlorine, bromine, iodine or nitro, and R.sup.2 is nitro or nitroso, or ##STR3## where R.sup.4 is hydrogen, C.sub.1 -C.sub.4 alkyl, fluorine, chlorine, bromine or iodine.
摘要:
Polyamide substrates are dyed from aqueous baths with suitable dyes and with copper complexes of organic N-nitrosohydroxylamines as light stabilizers for the dyed polyamide.
摘要:
A polyalky-piperidinyl-containing .beta.-aminoacrylic ester derivative represented by the formula I ##STR1## is useful in stabilizing plastic and paints against light, oxygen and heat.
摘要:
N-(.beta.-carbonyl- and .beta.-cyanovinyl)-2,2,6,6-tetramethylpiperidine derivatives of the formula I ##STR1## where R.sup.1 is COOR.sup.3, COR.sup.4, CONR.sup.4 R.sup.5 or CN,R.sup.2 has the meanings of R.sup.1 or is C.sub.1 -C.sub.12 -alkyl or hydrogen,R.sup.3 is hydrogen, C.sub.1 -C.sub.8 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, C.sub.3 -C.sub.5 -alkenyl or phenyl which can be mono- to trisubstituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkoxycarbonyl, halogen, hydroxyl, phenoxy, phenyl, tolyl or xylyl,R.sup.4 and R.sup.5 are each hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl or phenyl which can be mono- to trisubstituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkoxycarbonyl, halogen, hydroxyl, phenoxy, phenyl, tolyl or xylyl,n is 1-4,X and A for each individual n have been defined in the specification.
摘要:
4-alkoxy-2-hydroxybenzophenone-5-sulfonic acids of the general formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.20 -alkyl which is unsubstituted or substituted by halogen, cyanao, hydroxyl, C.sub.1 -C.sub.20 -alkoxy, C.sub.2 -C.sub.20 -alkoxycarbonyl, acyloxy and/or phenyl which is unsubstituted or substituted by C.sub.1 -c.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy and/or halogen, R.sup.2 and R.sup.3 independently of one another are each hydrogen, halogen, C.sub.1 -C.sub.12 -alkyl, C.sub.1 -C.sub.12 -alkoxy, C.sub.1 -C.sub.4 -haloalkyl, C.sub.3 -C.sub.8 -cycloalkyl, C.sub.4 -C.sub.12 -cycloalkylalkyl, cyano, hydroxyl or hydroxyethyl or are each phenoxy, C.sub.7 -C.sub.10 -phenalkyl or phenyl which is unsubstituted or substituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy and/or halogen, and R.sup.4 is hydrogen or sulfo, are prepared by reacting a 4-alkoxy-2-hydroxybenzophenone of the general formula II ##STR2## with chlorosulfonic acid at from -20.degree. to +100.degree. C., by a novel and improved process in which the reaction is carried out in an aliphatic, cycloaliphatic and/or aromatic carboxylate as solvent.
摘要:
A process for the preparation of 2,4-dihydroxybenzophenone by reacting resorcinol with benzotrichloride in water, wherein the reaction mixture contains a surfactant or a dispersing or emulsifying agent in a concentration of from 0.05 to 5%, by weight of the water.The product is obtained in high yield and good purity.
摘要:
Bicyclo[3.3.1]nonane derivatives of the general formula (I) ##STR1## where n is an integer from 1 to 70,R.sup.1 is hydrogen,R.sup.2 is hydrogen or hydroxyl, or the radical ##STR2## R.sup.3 and R.sup.4 are each independently of the other phenyl or 1- or 2-naphthyl, which phenyl or naphthyl may each be substituted by 1, 2 or 3 C.sub.1 -C.sub.12 -alkyls, C.sub.1 -C.sub.12 -alkoxys, chlorines, bromines, fluorines, trifluoromethyls or cyanos, in the case of 2 or 3 substituents these substituents being identical or different,A and B are each independently of the other a chemical bond, C.sub.1 -C.sub.22 -alkylene, cycloalkylene ##STR3## where m and o are each from 1 to 20 andR.sup.10 is hydrogen, C.sub.1 -C.sub.22 -alkyl, C.sub.5 -C.sub.12 -cycloalkyl, C.sub.7 -C.sub.18 -phenylalkyl, phenyl or C.sub.2 -C.sub.22 -cyanoalkyl,M is a radical of the formula ##STR4## which may be bonded to A not only via the nitrogen atom but also via the carbon atom, andR.sup.11, R.sup.12, R.sup.13 and R.sup.14 are each independently of the others C.sub.1 -C.sub.4 -alkyl, orR.sup.11 and R.sup.12 and/or R.sup.13 and R.sup.14 are each together tetramethylene or pentamethylene,R.sup.5 is hydrogen, cyano, hydroxyl, ##STR5## R.sup.15 is hydrogen, C.sub.1 -C.sub.22 -alkyl, C.sub.5 -C.sub.12 -cycloalkyl, C.sub.5 -C.sub.16 -phenylalkyl or a 5- or 6-membered heterocycle, or, when n is 1, --M--B--R.sup.5 is a radical of the formula ##STR6## where R.sup.16 is C.sub.1 -C.sub.4 -alkyl,R.sub.17 is hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy andR.sub.18 is hydrogen or C.sub.1 -C.sub.12 -alkyl, have remarkably good stabilizing properties in respect of plastics, are colorless, are highly compatible with organic polymers and are stable to thermal decomposition.
摘要:
An electrically conductive surface layer is produced on moldings consisting of plastics which are soluble or swellable in organic solvents, the conductivity of the said layer being based on a system, incorporated therein, oforganic electron acceptors (I) on the one hand andorganic electron donors (II), iodides (III) or a mixture of (II) and (III) as electron donors, on the other hand,by a process in which the moldings are treated with organic solutions of these components.The products have a surface resistance of from 10.sup.8 to 10.sup.2 ohm and have the advantage that the remaining properties of the moldings are virtually unaffected by the agents (I) to (III).
摘要:
Maleimide/.alpha.-olefin copolymers are composed of structural units I ##STR1## where R.sup.1 is a tetramethylpiperidinyl radical of the formula II ##STR2## R.sup.3 is hydrogen, C.sub.1 -C.sub.6 -alkyl, formyl, C.sub.2 -C.sub.6 -alkanoyl, C.sub.1 -C.sub.12 -alkoxy, C.sub.5 - or C.sub.6 -cycloalkoxy, cyanomethyl, 2-hydroxyethyl, benzyl or a radical of the formula --CR.sup.4 =CH--CO--OR.sup.5, R.sup.4 is hydrogen, C.sub.1 -C.sub.6 -alkyl or a radical of the formula --CO--OR.sup.5, and R.sup.5 is C.sub.5 -C.sub.18 -alkyl, C.sub.5 -C.sub.8 -cycloalkyl, C.sub.7 -C.sub.18 -aralkyl, phenyl or tolyl, and up to 8 mol %, based on II, of R.sup.1 may furthermore be hydrogen, C.sub.1 -C.sub.22 -alkyl or C.sub.5 -C.sub.8 -cycloalkyl, and R.sup.2 is a mixture of C.sub.14 -C.sub.28 -alkyl groups, where two of these alkyl groups, which may differ by no more than two carbon atoms, each account for at least 30% of this mixture, having an average molecular weight of from 1,000 to 50,000. The copolymers described are suitable as light stabilizers and stabilizers for organic material, in particular plastics and coatings.