Abstract: Thermal stability of halogen-containing polymers is improved by incorporation therein of (a) a compound of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are independently selected from hydrogen, alkyl, aryl, alkyl- or alkoxy-substituted aryl, aralkyl, alkyl- or alkoxy-substituted aralkyl, or taken together form an alkylene radical of 3 to 9 carbon atoms; R.sub.3 and R.sub.4 are independently selected from alkyl of at least 4 carbon atoms, carbalkoxyalkyl, aryl, alkyl- or alkoxy-substituted aryl, aralkyl, alkyl- or alkoxy-substituted aralkyl or taken together form thiodimethylene, an ortho-arylene radical, an alkyl- or alkoxy-substituted ortho-arylene radical, or an alkylene radical of 2 to 4 carbon atoms; in combination with (b) a divalent metal salt of a carboxylic acid of 7 to 20 carbon atoms, or mixture of such metal salts.

Abstract: Dustless, free-flowing ultraviolet absorbing compositions for use in polyolefins comprise an intimate mixture of a major proportion of a nickel amine complex of a 2,2'-thiobis(4-alkylphenol) and a minor proportion of a low molecular weight polyethylene.

Abstract: A liquid slurry of submicron particles of hexabromobenzene is prepared by vaporizing hexabromobenzene in a first zone, transporting the vapors to a second zone by use of an inert carrier gas, condensing the vapors in a second zone so as to form a liquid slurry, and thereafter recovering the slurry formed. The product particles are particularly effective when used as a fire retardant in an acrylic fiber having high luster requirements.

Abstract: Polycarbonate is effectively stabilized against degradation by ultraviolet radiation by .alpha.-cyano-.beta.-(N-cyano-ethyl-p-methoxyanilino)acrylonitrile or .alpha.-cyano-.beta.-(N-methyl-p-ethoxyanilino)acrylonitrile.

Abstract: A process for preparing a sterically hindered 3,5-dialkyl-4-hydroxybenzoic acid which comprises reacting a sterically hindered 2,6-dialkylphenol with an excess of sodium hydride or lithium hydride in a dry dipolar aprotic solvent, carboxylating the resulting anhydrous phenolate with an excess of carbon dioxide at atmospheric pressure and at a temperature of about 70.degree. C. to 80.degree. C., then destroying the excess sodium hydride or lithium hydride by addition of an alcohol, followed by acidifying the reaction mixture to obtain a high yield of the sterically hindered 3,5-dialkyl-4-hydroxybenzoic acid.

Abstract: Compounds of the formula: ##STR1## WHEREIN R.sub.1 and R.sub.2 are each branch-chain alkyl of 3 to 8 carbon atoms and -Het is a nitrogen-containing heterocyclic moiety attached to the carbonyl carbon atom through a heterocyclic nitrogen are useful as light stabilizers in polyolefins. They may be prepared (a) by reacting the 3,5-dialkyl-4-hydroxybenzoyl chloride with the appropriate heterocyclic amine in the presence of an acid acceptor or (b) by reacting the corresponding benzoic acid with the appropriate heterocyclic amine in the presence of a carbodiimide as dehydrating agent.

Abstract: Compounds of the formula: ##STR1## wherein R is hydrogen or alkyl (C.sub.1 -C.sub.8), R' is hydrogen, hydroxyl or lower alkoxy (C.sub.1 -C.sub.8); R" is alkyl (C.sub.1 -C.sub.20), alkylene (C.sub.2 -C.sub.12), cycloalkyl, wherein the alicyclic ring contains 5- or 6-carbon atoms, cycloalkylene, wherein the alicyclic ring may contain lower alkyl substituents, alkenyl (C.sub.3 -C.sub.20), arylene or aralkylene; n is an integer from 1 to 4, are useful for stabilizing polyolefin polymer against photo and thermal degradation.

Abstract: An ultraviolet radiation-curable composition is provided which comprises a polyethylenically unsaturated compound and effective photosensitizing amounts of (a) a phenacyl ester, and (b) a tertiary aliphatic amine.

Abstract: 2-Alkoxy-1,3-diphenyl-1,3-propanedione compounds have been found useful as photosensitizers in radiation-curable coating compositions. The novel photosensitizers of this invention have the structural formula ##STR1## in which R is an alkyl radical of from one eight carbon atoms.

Abstract: Polyester filaments treated with aromatic isocyanate to provide improved adhesion to rubber also have improved fatigue resistance and improved drawability provided the aromatic isocyanate used is a mixture of 50 to 90% di-functional aromatic isocyanates and the remainder higher than di-functional aromatic isocyanates.

Abstract: Polyester filaments of improved drawability and improved adhesion to rubber are prepared by applying to polyester filaments coated with aromatic isocyanate containing at least two isocyanate groups per molecule 0.02 to 0.4% on weight of fiber of a hydroxy-containing finish less than 1 hour prior to drawing such filaments to 4 to 7 times their undrawn length.

Abstract: Compounds of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are each branch-chain alkyl of 3 to 8 carbon atoms and R.sub.3 and R.sub.4 are each alkyl of 1 to 4 carbon atoms are useful as light stabilizers in polyolefins. They may be prepared by reacting 3,5-dialkyl-4-hydroxybenzoic acid with 4-amino-2,2-dimethyl-6,6-di(lower alkyl)piperidine in the presence of a carbodiimide as dehydrating agent.

Abstract: Compounds of the formula: ##STR1## wherein X is --H, --OH, --O. alkyl of 1 to 8 carbon atoms, or acyl of 2 to 10 carbon atoms, and R is alkyl of 1 to 8 carbon atoms are useful for stabilizing polyolefins against degradation by ultraviolet light.

Abstract: Compounds of the formula: ##STR1## WHEREIN R is a branched chain alkyl group containing three to about twelve carbon atoms; Y is the residue of the carboxylic acid Y(COOH)n, provided that when Y is alkyl and n is one, Y contains more than ten carbon atoms; and n is one to four. These compounds are useful as antioxidants in organic substrates, such as polyolefines, rubber, etc.

Abstract: Compounds of the formula: ##SPC1##Wherein R.sub. 1 and R.sub. 2 are each branch-chain alkyl of 3 to 8 carbon atoms, R.sub. 3 is --CH.sub.2 CH.sub.2 OZ wherein Z is hydrogen or ##SPC2##And R.sub. 4 is hydrogen or R.sub. 3 are useful as light stabilizers in polyolefins. They may be prepared (a) by reacting the 3,5-di-alkyl-4-hydroxybenzoyl chloride with the appropriate amine in the presence of an acid acceptor or (b) by reacting the corresponding benzoic acid with the appropriate amine in the presence of a carbodiimide as dehydrating agent.

Abstract: O,O-Bis(aryl)amidothiophosphates, useful as light stabilizers in polyolefins, are those having the formula: ##EQU1## wherein: R is hydrogen, alkyl of 1-12 carbons, or halogen; Ar is phenyl or naphthyl; n is 1 or 2; and R' and R", which may be the same or different, are each selected from the group consisting of hydrogen, alkyl of 1-18 carbons, 2,2,6,6-tetramethyl-4-piperidyl, cycloalkyl of 5-6 carbons or both R' and R", together with the N to which they are attached, form a morpholino or piperidino ring. Such compounds are made by reacting PSCl.sub.3 with two moles of a phenol and then the product thereof with an amine.

Abstract: Nickel amine, nickel alkanolamine, nickel aquo, and nickel bis- complexes of 2,2'-thiobis(p-alkylphenol), used to stabilize materials against degradation by ultraviolet radiation, are stabilized against thermal degradation by use of a dialkyl pentaerythritol diphosphite.

Abstract: Compounds of the formula: ##SPC1##Wherein R.sub.1 and R.sub.2 are each branch-chain alkyl of 3 to 8 carbon atoms and R.sub.3 and R.sub.4 are each hydrogen, alkyl of 1 to 18 carbon atoms, or cycloalkyl of 5 or 6 carbon atoms are useful as light stabilizers in polyolefins. They may be prepared (a) by reacting the 3,5-di-alkyl-4-hydroxybenzoyl chloride with the appropriate amine in the presence of an acid acceptor or (b) by reacting the corresponding benzoic acid with the appropriate amine in the presence of a carbodiimide as dehydrating agent.

Abstract: Thermal stability of vinyl chloride polymer is improved by use of a compound of the formula ##EQU1## wherein R.sub.1 is aryl or lower alkyl-substituted aryl; R.sub.2 is hydrogen or lower alkyl; n is 1 or 2; and R.sub.3 is hydrogen or lower alkyl when n is 1 and is alkylene of 1 to 4 carbon atoms or thiodiethylene when n is 2, alone or in combination with a divalent metal salt of a fatty acid of 12-20 carbon atoms.

Abstract: Thermal stability of vinyl chloride polymer is improved by use of a compound of the formula ##EQU1## WHEREIN N IS 1 OR 2 AND R is alkyl, alkylene, aryl, arylene, lower alkyl-substituted aryl or arylene, or fluoro-substituted aryl or arylene, alone or in combination with a divalent metal salt of a fatty acid of 12-20 carbon atoms.