Abstract: Copolymers are disclosed of lower alpha-olefins and HALS-containing monomers, typically 1-(10-undecenyl)-2,2,6,6-tetramethylpiperidine. They may be used for light or heat stabilizing, by themselves or in blends with other polymers.

Abstract: Fully hindered secondary amines, typically tetramethyl piperidine, are reacted with terminally unsaturated electrophilic compounds having at least five carbon atoms to obtain tertiary hindered amines. The reaction is conducted with an excess of secondary amine, preferably in the presence of a specified solvent such as N-methyl pyrrolidinone.

Abstract: New N-substituted piperidines useful as light stabilizers in synthetic resins are disclosed. They are 1-(2,7-octadienyl)-2,2,6,6-tetraalkylpiperidines wherein the alkyl groups are independently selected lower alkyl groups such as methyl or ethyl and the 3 and 5 positions may be substituted by methyls. The ring may be monounsaturated; a new compound 1-(2,7-octadienyl)-2, 2,6,6-tetramethyl-3-pyridine is described.

Abstract: This invention provides a unique method of producing 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane ("BPTMC"). The disclosed method manufactures BPTMC from ketals and hemithioketals of 3,3,5-trimethylcyclohexanone ("TMC"). The reaction takes place in the presence of an acid catalyst, and optionally added co-catalysts. Additionally, applicants have disclosed a particularly useful method of manufacturing BPTMC from TMC and alcohol and/or thiol starting materials. These starting materials react to form the TMC ketal or thioketal materials. This method is particularly useful in that it allows recovery and recycling of the alcohol and/or thiol.

Abstract: A process for making 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane via the acid catalyzed reaction of phenol and 3,3,5-trimethylcyclohexanone containing an organic thiol co-catalyst is described wherein the organic thiol is rejuvenated by treatment with a halogen acid and recycled to a fresh mixture of phenol and 3,3,5-trimethylcyclohexanone to make additional 1,1-bis-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane.

Abstract: The present inventon pertains to a process for the preparation of omega-arylalkanoic acids of the genral formulaR--Ar--R.sup.1 --COOHwherein R is hydrogen, hydroxy, C.sub.1 -C.sub.8 alkyl, C.sub.1 -C.sub.8 alkoxy, or aryl; wherein R.sup.1 is C.sub.1 -C.sub.4 alkyl; and wherein Ar is an aryl group which can be further substituted with at least one of hydroxy, C.sub.1 -C.sub.8 alkyl, C.sub.1 -C.sub.8 alkoxy, aryl, halide, amino, or acetamido. The omega arylalkanoic acids of the given formula are prepared using catalysts which provide an improvement over the known Willgerodt-Kindler reaction.The present invention also pertains to methods for removing sulfur during the above-described process for the preparation of the omega-arylalkanoic acids.