Abstract: The present invention provides a stabilized polyolefin resin composition having improved resistances to oxidation and to weather which is prepared by adding (a) a phenol antioxidant, (b) a sulfur antioxidant, (c) a hindered amine light stabilizer and (d) an aliphatic monocarboxylate of a metal belonging to the group Ia or IIb to a polyolefin resin containing an inorganic filler.

Abstract: Bis-(2,2,6,6-tetramethyl-piperidyl)diimides are provided, having the formula: ##STR1## in which R is selected from the group consisting of hydrogen; oxyl; alkyl and alkenyl having from one to about eighteen carbon atoms; epoxy and hydroxyalkyl having from two to about eight carbon atoms; acyl having from two to about eight carbon atoms; and phenalkyl having from seven to about twelve carbon atoms; and Z is a tetravalent aliphatic or cycloaliphatic hydrocarbon group having from two to about eighteen carbon atoms; and stabilizer and synthetic polymer compositions containing such diimides having improved resistance to deterioration when exposed to light.

Abstract: A process is provided for the preparation of 2,2,6,6-tetramethyl-4-oxopiperidine, reacting acetone with ammonia in the presence of a catalytically effective amount of an organic carboxylic acid halide.

Abstract: A process is provided for the preparation of 2,2,6,6-tetramethyl-4-oxopiperidine, reacting acetone with 2,2,4,4,6-pentamethyl-2,3,4,5,-tetrahydropyrimidine in the presence of a catalytically effective amount of an organic carboxylic acid halide.

Abstract: N-2-Hydroxypropyl piperidines are provided, as well as a process for preparing these compounds, having the formula: ##STR1## wherein X is selected from the group consisting of , ##STR2## wherein R.sub.1 is selected from the group consisting of hydrogen; alkyl; alkenyl; cycloalkyl; alkaryl; hydroxyalkyl; oxyalkyl; acyl and aroyl having from one to about eighteen carbon atoms;R.sub.2 and R.sub.3 are each selected from the group consisting of alkyl, alkenyl, cycloalkyl, alkaryl, hydroxyalkyl, oxyalkyl and haloalkyl having from one to about eighteen carbon atoms;R.sub.4, R.sub.5 and R.sub.6 each are selected from the group consisting of hydrogen, alkyl, alkenyl, cycloalkyl, alkaryl, hydroxyalkyl, oxyalkyl and haloalkyl having from one to about eighteen carbon atoms; and --CH.sub.2 --O--R.sub.1 ;n is 1 or 2; andY, when n is 1, is hydroxy or ##STR3## and when n is 2, is oxyoxygen.

Abstract: 2,2,6,6-Tetramethyl-4-piperidyl spiro aliphatic ethers are provided, useful as stabilizers for organic polymeric materials.

Abstract: 2,2,6,6-Tetramethyl-4-piperidyl spiro aliphatic ethers which are useful as stabilizers for organic polymeric materials, and have the general formula are disclosed: ##STR1## wherein: Y.sub.1 is ##STR2## A.sub.1, A.sub.2, A.sub.3, A.sub.4, A.sub.5, and A.sub.6 are groups which are defined in the specification, at least one pair of A.sub.1 and A.sub.2 ; A.sub.3 and A.sub.4 ; and A.sub.5 and A.sub.6 being taken together to form the group ##STR3## the groups R.sub.1, R.sub.2, R.sub.3 and Z as well as X, p, and m being as defined in the specification.

Abstract: A novel process is provided for preparing 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone), comprising forming a novel 2-hydroxy-4-alkoxy-5-aminomethylbenzophenone by a reaction of a 2-hydroxy-4-alkoxybenzophenone with an amine and formaldehyde, and causing the 2-hydroxy-4-alkoxy-5-aminomethylbenzophenone to react with a 2-hydroxy-4-alkoxybenzophenone or to dimerize.Both the aminomethylhydroxyalkoxybenzophenone and the methylenebis (2-hydroxy-4-alkoxybenzophenone) which are prepared according to this invention are useful to prevent photo-degradation of organic materials, particularly as light stabilizers for synthetic resins.

Abstract: Synthetic resins processed at temperatures in excess of 200.degree. C. are protected against deterioration on exposure to light of wave length shorter than 400 nanometers by compounding with a stabilizer composition comprising (A) 40 to 90 parts by weight of at least one 5,5'-methylenebis(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group, (B) 5 to 30 parts by weight of at least one 3,5'-methylenedi(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group, (C) 5 to 40 parts by weight of at least one 3,3'-methylenebis(2-hydroxy-4-alkoxybenzophenone) having 1 to 18 carbon atoms in the alkoxy group. Synthetic resins suitably stabilized with compositions of the invention include thermoplastic polyesters such as polyhydric phenol carbonate polyesters and alkanediol terephthalate polyesters, as well as high melting polyolefins such as poly-4-methylpentene and polypropylene.

Abstract: Organic phosphites are provided having at least one 2,2,6,6-tetramethyl piperidyl substituent attached at the 4-position to phosphorus through oxygen, and at least one polyol or polyphenol group, which are superior light and heat stabilizers for organic polymeric mterials such as polyethylene, polypropylene, polyvinyl chloride, acrylonitrile-butadiene-styrene terpolymers, polyamides, polystyrene, and similar polymers.