摘要:
Malonic acid derivatives of the formula ##STR1## wherein Z contain sterically hindered piperidines as stabilizers against light-induced degradation for organic material.
摘要:
Acid addition salts of basic polyalkylpiperidine derivatives, which contain a group of the formula I ##STR1## in which R is H or CH.sub.3, and an inorganic or organic acid, and also inner salts of sulfonic acids which contain a group of the formula I, are suitable as curing catalysts for acid-curable stoving lacquers. Their advantage is a long pot life and also an additional light stabilizing action.
摘要:
Oligomeric esters of the formula I or II ##STR1## in which n has a value from 1 to 3, R.sup.1 and R.sup.2 are divalent organic radicals, at least one of which contains a polyalkylpiperidine radical of the formula III ##STR2## in which R is hydrogen or C.sub.1 -C.sub.4 -alkyl and E and E' are end groups, are prepared by polycondensing a dicarboxylic acid ester with a diol, one of the two components being used in a molar excess of 33 to 100%. The end groups of these oligoesters can be modified by reaction with a monofunctional component. If two different dicarboxylic acid esters or diols are used, the corresponding co-oligoesters are obtained. All these oligoesters are valuable light stabilisers for light-sensitive organic material, especially for polymer.
摘要:
Mixtures of a polymer which contains polyalkylpiperidines chemically bonded in any form and a metal compound MeL.sub.w, in which Me is a divalent or trivalent metal ion or a divalent oxo-metal ion or a divalent dialkyl-tin ion, L is the monovalent anion of a carboxylic acid, of a phosphinic acid or of a phosphonic acid monoester or of an enol and w is 2 or 3, are effective light stabilizers for plastics. The piperidine-containing polymers can be, for example, polyesters, polyamides, polyamines, polyaminotriazines or poly(meth)-acrylates. Examples of metal compounds MeL.sub.w are nickel oenanthate or nickel acetylacetonate. Plastics to be stabilized are in particular the polyolefins.
摘要:
o-Hydroxyphenyl-s-triazines of the formula I in which n is 1 to 4 and R1 to R7 are as defined in claim 1, can be used, in combination with sterically hindered amines of the polyalkylpiperidine type, for stabilizing organic polymers. Some of these compounds ate novel and can also be used without polyalkylpiperidine.
摘要:
Compounds which comprise at least one group of the formula I or II ##STR1## and at least one polyalkylpiperidine group of the formula III ##STR2## in which R and R.sub.1 to R.sub.6 have the meaning indicated in claim 1, are effective stabilisers for organic materials against damage by light, oxygen and heat.
摘要:
Compounds which contain at least one group of the formula I ##STR1## in which X is a group which completes the ring to form a piperidine ring, are effective stabilizers for organic materials against damage by light, oxygen and heat.
摘要:
Compounds of the formula I ##STR1## in which X is a group ##STR2## and R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are monovalent organic radicals, at least one of which contains a sterically hindered phenol group and at least one of which contains a polyalkylpiperidine group, are outstanding light stabilizers for color-photographic recording materials. They also have a stabilizing action on the photo dyes and their precursors when stored in the dark.
摘要:
A color-photographic recording material which, in at least one light-sensitive silver halide emulsion layer, an interlayer and/or a protective layer, contains at least one polyalkylpiperidine compound of the formula I ##STR1## in which R is an OH group and R.sub.1 is a group of the formula II ##STR2## or of the formula ##STR3## and X is a group of the formula ##STR4## or of the formula ##STR5## Color images obtained by imagewise exposure and development of this color-photographic recording material show good stability to the action of visible and ultraviolet light.With respect to the definitions of the substituents and symbols in the formulae, reference is made to the description.
摘要:
The invention relates to ester mixtures of polyalkylpiperidine derivatives of the formulae I and II ##STR1## in which R.sub.1 is hydrogen or methyl, R.sub.2 is hydrogen, C.sub.1-12 alkyl, C.sub.3-8 alkenyl, C.sub.7-11 aralkyl, cyanomethyl or C.sub.2-4 acyl, R.sub.3 is C.sub.1-18 alkylene, C.sub.2-18 oxaalkylene, Chd 2-18 thiaalkylene, C.sub.2-18 azaalkylene or C.sub.2-8 alkenylene and R.sub.4 is C.sub.1-4 alkyl. These mixtures are suitable as stabilizers for plastics.