Abstract: Compositions are provided which are effective for stabilizing halogen containing polymers against the deteriorative effects of heat. These stabilizer compositions comprise (1) at least one zinc mercaptoester, (2) at least one basic inorganic alkali or alkaline earth metal compound, and, optionally, (3) at least one substituted dihydropyridine.

Abstract: Novel compounds having two bis (2,2,6,6-tetramethyl-4-piperidyl)-substituted nitrogen heterocyclic rings are provided which are useful as stabilizers for organic polymers. Organic polymer containing the novel compounds having two bis (2,2,6,6-tetramethyl-4-piperidyl)-substituted nitrogen heterocyclic ring compounds exhibit improved resistance to deterioration induced by light, by heat or by a combination of light and heat.

Abstract: Compositions which are useful as stabilizers for halogen containing polymers are provided comprising (1) at least one alkyltin mercaptide, (2) at least one zinc mercaptoester, and (3) at least one basic alkali or alkaline earth metal compound. Also provided are polymer compositions containing these stabilizers.

Abstract: A novel 2,2,6,6-tetramethyl-4-piperidyl substituted nitrogen heterocyclic ring compound is provided which is useful as a stabilizer for organic polymers. Organic polymers containing the novel 2,2,6,6-tetramethyl-4-piperidyl substituted nitrogen heterocyclic ring compound exhibit improved resistance to deterioration induced by light, by heat or by a combination of light and heat. The novel 2,2,6,6-tetramethyl-4-piperidyl substituted nitrogen heterocyclic ring compound is prepared by a novel method comprising the step of reacting 2,2,6,6-tetramethyl-4-piperidyl substituted 1,2-aliphatic diamine with a monoaldehyde or dialdehyde.

Abstract: Polyalkylated 4-aminopiperidine derivatives having the formula: ##STR1## wherein R is a C.sub.1 -C.sub.19 alkyl group, a cycloalkyl group of from 5 to 7 carbon atoms, an unsubstituted aryl group, an aryl group substituted with one or more C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy groups, an aralkyl group having 7 or 8 carbon atoms, or ##STR2## where x is an integer from 0 to 4 inclusive and R' is C.sub.1 -C.sub.4 alkyl, which are useful as stabilizers for synthetic polymers are disclosed. Also disclosed are compositions stable to photo-deterioration comprising said polyalkylated 4-aminopiperidine derivatives and a synthetic polymer.

Abstract: The storage stability of impure hydroxybenzophenones is improved by the addition thereto of an organic phosphite or organic phosphonite.

Abstract: Polymers of olefins are stabilized against ultraviolet light by a synergistic combination of stabilizers including (1) a hydroxybenzophenone and (2) an organotin compound of the formula:(a) RnSn--SR.sup.1 COOR.sup.2) 4-n,(b) RnSn--S--R.sup.2) 4-n,(c) RnSn--S R.sup.1 OOCR.sup.2) 4-n,(d) ((R).sub.3 Sn-S).sub.x R.sup.4 --Z).sub.y, or ##STR1## where R is alkyl, alkenyl, aryl, aralkyl, alkaryl or cycloalkyl, R.sup.1 is alkylene, arylene, cycloalkylene, aralkylene or alkarylene, R.sup.2 is an alkyl, aryl, aralkyl, alkenyl, alkaryl or cycloalkyl, R.sup.5 is alkylene, R.sup.4 is aliphatic, aromatic, araliphatic, alkyl substituted aromatic or cycloaliphatic radical of at least 2 carbon atoms and having a free valence of x+y, Z is --OH, --COOH, --COOR.sup.2 or --OOCR.sup.2 or Z can be a mixture of these radicals if y is greater than 1, x is 1 to 4, y is 0 to 3, x+y is 1 to 4 and n is 1 to 3. Preferably the olefin is polyethylene or polypropylene. Preferably the hydroxybenzophenone also has at least one alkoxy group.

Abstract: Novel polynuclear hindered phenols having three hindered phenol groups each bonded through a methylene group to a substituted aromatic nucleus and methods of making same are provided which have stabilizing activity in organic substances normally susceptible to oxidative degradation.

Abstract: The following reactions are carried out in the presence of aprotic solvents as catalysts: ##EQU1## WHERE R, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 are alkyl, cycloalkyl, alkenyl, aryl or aralkyl, R.sub.1 is ##EQU2## allyl, methallyl or benzyl, R.sub.7 is alkyl, cycloalkyl, alkenyl or aralkyl, R.sub.12 is alkyl or alkenyl, X is chlorine or bromine and n is 1 or 2. The aprotic solvents are ##EQU3## WHERE R.sub.8 is H or CH.sub.3 and R.sub.9 and R.sub.10 are CH3 or C.sub.2 H.sub.5.