Abstract: Hindered bisphenol diphosphonites are provided having the structure: ##STR1## wherein: A is selected from the group consisting of thio sulfur --S--; oxy oxygen --O--; alkylidene having from one to about ten carbon atoms; cycloalkylidene having from about four to about eight carbon atoms; and phenylalkylidene having from seven to about twelve carbon atoms;R is selected from the group consisting of alkyl having from one to about eighteen carbon atoms; cycloalkyl having from three to about twelve carbon atoms; and aralkyl having from seven to about twelve carbon atoms;R.sub.1 is selected from the group consisting of hydrogen; alkyl having from one to about eighteen carbon atoms; cycloalkyl having from three to about twelve carbon atoms; and aralkyl having from seven to about twelve carbon atoms;R.sub.2 is selected from the group consisting of ##STR2## as well as synthetic resin compositions having an enhanced resistance to deterioration by heat and light comprising a synthetic resin and such phosphonites.

Abstract: Ortho-alkylated phenyl phosphonites of the formula ##STR1## wherein R.sup.1 is alkyl, phenyl or phenyl substituted by alkyl, R.sup.2 is tertiary alkyl or phenylalkyl, and R.sup.3 is hydrogen, alkyl or phenylalkyl are useful as stabilizers for organic polymers and lubricating oils, particularly as processing stabilizers for polyolefins.

Abstract: Bis-phenol phosphates, are provided, represented by the formula: ##STR1## wherein: R is selected from the group consisting of a carbon-to-carbon bond; thio sulfur --S--; and alkylidene ##STR2## in which R.sub.3 and R.sub.4 are selected from the group consisting of hydrogen, alkyl having from one to about eighteen carbon atoms, and cycloalkyl, including cycloalkylidene in which R.sub.3 and R.sub.4 are taken together as part of a cycloalkylene ring, having from three to about twelve carbon atoms;R.sub.1 and R.sub.2 are each selected from the group consisting of hydrogen, alkyl having from one to about eighteen carbon atoms; and cycloalkyl having from three to about twelve carbon atoms;m is 0 or 1;M is a metal atom which can be monovalent or polyvalent; and n is the valence of the metal atom M, ranging from one to about four;useful to improve clarity of polyolefin resin compositions in an amount within the range from 0.005 to 5 parts by weight per 100 parts of resin.

Abstract: A group of diphosphonic acid tetra-esters and phosphonic or thiophosphonic acid 0,0,0-triesters containing dioxaphosphorinane rings are useful as flame retardants for polymeric organic materials, particularly polyesters. The compounds, some of which are novel, are prepared by reaction of the corresponding phosphites with peroxy compounds or with sulphur.

Abstract: A polycarbonate such as a bisphenol-A homopolycarbonate containing a small amount of an aromatic bis(cyclic phosphate) such as 2,2'-[(1-methylethylidene)bis(4,1-phenyleneoxy-2,1-ethanediyloxy)]bis(5,5- dimethyl-2,2'-dioxo-1,3,2-dioxaphosphorinane) exhibits improved thermal stability.

Abstract: An olefin polymer composition containing an ultraviolet light stabilizer. The ultraviolet light stabilizer is a zerovalent nickel complex the organic portion of which is an ester of pentaerythritol phosphite.

Abstract: Polyphenylene ether resins and compositions of such resins in admixture with certain specific phosphite thermal oxidative stabilizers are described. These blends can be used with or without impact modifiers. As an additional benefit, the resins and compositions possess good melt flow properties which facilitates processing during molding.

Abstract: Polypropylene and other polyolefins are rendered flame retardant by the addition of a phosphonate ester having the following formula: ##STR1## wherein a 0, 1 or 2, b is 0, 1 or 2, c is 1, 2 or 3 and a+b+c is 3; R and R' are the same or dissimilar and are alkyl, alkoxy, aryl, aryloxy, alkaryl, alkaryloxy, aralkyl, aryloyxalkoxy, or aralkoxy; wherein the alkyl portion of these groups may contain hydroxyl but no halogen and the aryl portion may contain chlorine bromine and hydroxyl groups; R.sup.2 is alkyl, hydroxyalkyl, or aryl; R.sup.3 is lower alkyl (C.sub.1 -C.sub.4); and a wetting agent penetrant. The presence of the penetrant promotes penetration of the retardant composition into the polypropylene. This fire retardant composition is particularly useful in polypropylene fibers and fabrics particularly where the fibers are woven into a matte.

Abstract: A composition containing a chelated titanium compound and an additive selected from the group consisting of (1) esters of thioalkanoic acids, (2) di-tertiary-butyl phenol containing compounds, (3) organic phosphites, and (4) mixtures of (2) and (3), retards the color change of the composition on storage. When this composition is used as the catalyst for one package, room temperature curing silicone elastomeric compositions of the type comprising a hydroxyl endblocked polydiorganosiloxane and a silane having an average of from 2.01 to 4 inclusive alkoxy radicals, the silicone elastomeric composition can be stored without substantial color formation. The improvement in reduced color change is useful in silicone elastomeric compositions which are clear or light colored.

Abstract: A group of diphosphonic acid tetra-esters and phosphonic or thiophosphonic acid O,O,O-triesters containing dioxaphosphorinane rings are useful as flame retardants for polymeric organic materials, particularly polyesters. The compounds, some of which are novel, are prepared by reaction of the corresponding phosphites with peroxy compounds or with sulphur.

Abstract: Chlorine-containing thermoplastics which contain, as a stabilizer, a compound of the formula I ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 are as defined in the description.

Abstract: The title compounds are prepared by reacting alkylated 1,1'-biphenyl-2,2'-diol or alkylated 2,2'-alkylidene-bis-phenol with phosphorus trichloride in an organic solvent and then reacting the intermediate phosphorochlorodite with an alkanolamine. Said phosphites are useful as stabilizers of organic polymers and lubricating oils, especially as processing stabilizers for polyolefins, elastomers, polyesters and polycarbonates.

Abstract: 2,6-Di-tertiary butyl phenyl phosphites are provided having the structure ##STR1## as well as synthetic resin compositions having an enhanced resistance to deterioration by heat and/or light due to the presence of an organic phosphite of this class.

Abstract: Alkylated 1,1'-biphenyl-2,2'diyl phosphites are prepared by reacting alkylated 2,2'-biphenol with phosphorus trichloride in an organic solvent and then reacting the intermediate with an alcohol or thiol. Said phosphites are useful as stabilizers of organic polymers and lubricating oils, especially as process stabilizers for polyolefins, elastomers, polyesters and polycarbonates.

Abstract: Phosphorous acid esters obtained by reacting bisphenols with phosphorous trihalogenide or triphosphite and optionally or mono- or polyhydroxy compound are especially useful for stabilizing polyamides.

Abstract: A stabilized oxymethylene copolymer composition comprising an oxymethylene copolymer, and incorporated therein,(1) at least one amine-substituted triazine of the following formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group, an alkoxy group, an aryl group, a hydrogenated aryl group, an amino group or a substituted amino group, and at least one of them is an amino group or a substituted amino group,(2) at least one sterically hindered phenol of the following formula ##STR2## wherein R.sub.4 and R.sub.5 are an alkyl group, a substituted alkyl group or a substituted triazole group and R.sub.

Abstract: Light-stable polypropylene fibers containing a combination of a hindered piperidinyl compound and a pentaerythritol polyphosphite.

Abstract: The title compounds are prepared by reacting alkylated 1,1'-biphenyl-2,2'-diol or alkylated 2,2'-alkylidene-bis-phenol with phosphorus trichloride in an organic solvent and then reacting the intermediate phosphorochlorodite with an alkanolamine. Said phosphites are useful as stabilizers of organic polymers and lubricating oils, especially as processing stabilizers for polyolefins, elastomers, polyesters and polycarbonates.