Abstract: 7-[N-(2-alkylidenimino-isobutylamino)]-1,3,5-triazaadamantanes and 7-[N-(2-arylidenimino-isobutylamino)]-1,3,5-triazaadamantane are prepared from 7-amino-1,3,5-triazaadamantane by two condensation steps. The new compounds are very good stabilizers against decomposition of polymers by heat and UV-light.

Abstract: The present invention relates to novel phosphites of sugar alcohols, their use as stabilizers for organic polymers, to stabilizer compositions containing these novel phosphites and to the organic polymers being stabilized therewith.The novel phoshites have a good stabilizing effect, especially in combination with known stabilizers, and they are substantially stable to hydrolysis.

Abstract: The invention is related to novel phosphites of sugar alcohols, their use as stabilizers for organic polymers, furthermore to stabilizer compositions containing these novel phosphites as well as the organic polymers stabilized therewith.The novel phosphites have a good stabilizing effect, especially in combination with known stabilizers, and they are substantially stable against hydrolytical influence. Their volatility and tendency to exudation are very weak.

Abstract: The present invention provides novel organo-tin compounds of the formula ##STR1## AND THEIR USE AS STABILIZERS FOR HALOGEN CONTAINING POLYMERS. As compared to the known tin stabilizers, the tin compounds of the invention have improved stabilizing properties at identical tin content.

Abstract: Derivatives of 1-oxa-3,8-diaza-spiro-[4,5]-decane, which be prepared by reacting a 2,2-dimethyl-6,6-dialkyl-4-hydroxy-4-carbamoylpiperidine with an aldehyde or ketone, are excellently suitable as light stabilizers for organic materials.

Abstract: New 1-oxa-4,8-diazaspiro[4,5]decanes are prepared by reacting a dimethyl-dialkyl-piperidone with an .alpha.-hydroxyamide in the presence of a condensation catalyst. The compounds can be used as UV stabilizers for polymers.

Abstract: Novel derivatives of 2,2,6,6-tetraalkylpiperidone-4-oximes constitute excellent stabilizers for synthetic polymer compositions against the action of ultraviolet radiation and heat. The compounds can be used either per se or in admixture with known stabilizers.

Abstract: By incorporating a substituted diazadispiro-hexadecane into a plastic composition the heat and light stability of this composition is considerably increased.

Abstract: 2,2-BIS-(ALKYL-4'-HYDROXYPHENYL)-CYCLOALKYL-(ALKYL) CARBONIC ACID ESTERS ARE PREPARED BY CONDENSATION OF ALKYL PHENOLS WITH 2-KETO-CYCLOALKYL CARBONIC ACID ESTERS IN THE PRESENCE OF ACIDIC CATALYSTS AND OPTIONALLY OF MERCAPTO DERIVATIVES. The product are useful for the stabilization of polymers against the decomposition by light and heat.

Abstract: Certain aza-adamantane compounds are suitable for stabilizing polymers against degradation by light and heat.It is known that ultraviolet radiation, especially in the near-ultraviolet range, has an adverse effect on the aspect and physical properties of organic polymers. Thus, for example, polyolefins and polyurethane elastomers tend to heavy degradation when they are exposed to light, that is, sun rays or ultraviolet radiation. Polyvinyl chloride and polyvinylidene chloride are discolored and also degraded under the above conditions, and polyamides too are often subjected to photo-degradation.Numerous stabilizers have been hitherto proposed for stabilizing synthetic polymers against photo-degradation, for example benzophenone and benzotriazole compounds for polyolefins, phenol and benzophenone compounds for polyurethanes, and salts of barium or cadmium and organic tin compounds for polyvinyl chloride and polyvinylidene chloride.

Abstract: Acetoacetic acid pentaerythrite phosphite ester may be easily mixed with polymers and improves their processing, color and weather stability.