Abstract: Copolymers of BPA and menthane bisphenols such as BPT1 and BPT2 can be used as a compatabilizer to allow the formation of homogeneous blends of BPA with menthane bisphenol polycarbonates such as poly-BPT1 or poly-BPT2 or copolymers thereof. Thus, a compatible polycarbonate blend is made by combining a bisphenol A polycarbonate, a menthane bisphenol polycarbonate and a BPA/menthane bisphenol copolymer compatabilizer, and mixing the combined materials to form a blend. The compatabilizer may contain one or more species of menthane bisphenol. In a specific example, BPT1 and BPT2 are used in the compatabilizer in a ratio, BPT1/BPT2, in the range of 70/30 to 10/90, preferably less than or equal to 1/1, for example around 30/70. By adjusting the relative amounts and the properties of the bisphenol A polycarbonate and the menthane bisphenol polycarbonate, the glass transition temperature and the toughness of the blend can be selected.

Abstract: A phosphite stabilizer composition is provided which exhibits enhanced hydrolytic stability. The stabilizer composition preferably contains from 10 to 90 percent by weight of a phosphorous compound selected from phosphites and phosphonites, and preferably contains from 10 to 90 percent by weight of a hindered phenolic isocyanate. The stabilizer composition exhibits enhanced hydrolytic stability, and is preferably in the form of powders or flakes. The stabilizer composition is useful as an additive to polymeric resins as an antioxidant stabilizer.

Abstract: A process for manufacturing organic phosphites of at least 95.5 wt. % purity, said process comprising: reacting a hydroxyl-containing compound with a phosphorous compound, and desorbing residual hydroxyl-containing compound in the reaction product in a desorbing column employing an inert gas as a desorbing agent.

Abstract: Copolymers of BPA and menthane bisphenols such as BPT1 and BPT2 can be used as a compatabilizer to allow the formation of homogeneous blends of BPA with menthane bisphenol polycarbonates such as poly-BPT1 or poly-BPT2 or copolymers thereof. Thus, a compatible polycarbonate blend is made by combining a bisphenol A polycarbonate, a menthane bisphenol polycarbonate and a BPA/menthane bisphenol copolymer compatabilizer, and mixing the combined materials to form a blend. The compatabilizer may contain one or more species of menthane bisphenol. In a specific example, BPT1 and BPT2 are used in the compatabilizer in a ratio, BPT1/BPT2, in the range of 70/30 to 10/90, preferably less than or equal to 1/1, for example around 30/70. By adjusting the relative amounts and the properties of the bisphenol A polycarbonate and the menthane bisphenol polycarbonate, the glass transition temperature and the toughness of the blend can be selected.

Abstract: Thermoplastic resin composition are provided that comprise a thermoplastic resin or mixture thereof and a stabilizing amount of an aromatic ketone compound, derivative of an aromatic ketone compound, or an adduct of an aromatic ketone compound, optionally containing a stabilizing amount of a stabilizer or mixture of stabilizers selected from the group consisting of the phenolic antioxidants, the 3-arylbenzofuranones, the hindered amine stabilizers, the ultraviolet light absorbers, the organic phosphorus compounds, the alkaline metal salts of fatty acids, the hydrotalcites, the epoxydized soybean oils, the hydroxylamines, the tertiary amine oxides, thermal reaction products of tertiary amine oxides, and the thiosynergists. The compositions have improved stability against thermal degradation.

Abstract: A diphosphite is provided derived from phosphorous trihalide, tetra alkyl hindered bisphenol, and a neoalkyl diol. The phosphites exhibit improved stability and are useful as thermal oxidative stabilizers for thermoplastic compositions.

Abstract: A process for producing organo-phosphites is described that involves heating a di-substituted phosphorohalidite, a phenolic compound, and a polymeric amine. An especially useful polymeric amine is N,N,N'N'-tetraethyl-1,3-propanediamine. Conversions in excess of about 97% are obtained.

Abstract: A diphosphite is provided derived from phosphorous trihalide, tetra alkyl hindered bisphenol, and a neoalkyl diol. The phosphites exhibit improved stability and are useful as thermal oxidative stabilizers for thermoplastic compositions.

Abstract: A diphosphite is provided derived from phosphorous trihalide, tetra alkyl hindered bisphenol, and a neoalkyl diol. The phosphites exhibit improved stability and are useful as thermal oxidative stabilizers for thermoplastic compositions.

Abstract: A solid amorphous phosphite stabilizer composition is provided which exhibits enhanced hydrolytic stability. The stabilizer composition preferably contains from 10 to 99.9 percent by weight of a phosphorous compound selected from phosphites and phosphonites, and preferably contains from 0.1 to 10 percent by weight of an aliphatic polyamine. The stabilizer composition exhibits enhanced hydrolytic stability, and is preferably in the form of powders or flakes. The stabilizer composition is useful as an additive to polymeric resins as an antioxidant stabilizer.

Abstract: A phosphite is provided having the formula: ##STR1## wherein Y.sup.1 is an alkyl group and Y.sup.2 is selected from the group consisting of sec-butyl and tert-butyl. The phosphite exhibits enhanced stability including hydrolytic and UV stability, and is useful in stabilizing thermoplastic compositions.

Abstract: A diphosphite is provided derived from phosphorous trihalide, tetra alkyl hindered bisphenol, and a neoalkyl diol. The phosphites exhibit improved stability and are useful as thermal oxidative stabilizers for thermoplastic compositions.

Abstract: A diphosphite is provided derived from phosphorous trihalide, tetra alkyl hindered bisphenol, and a neoalkyl diol. The phosphites exhibit improved stability and are useful as thermal oxidative stabilizers for thermoplastic compositions.

Abstract: A process is provided for making 2,2 bisphenyl phosphites and 2,2 biphenyl phosphites. The process provides pure product without requiring a recrystallization step. The process involves reacting phosphorous trichloride with either (a) an aromatic diphenol selected from the group of bisphenyl and biphenyls or (b) a monohydroxy hydrocarbon compound, to induce a first product, and then reacting the first product with the other of (a) and (b) in the presence of an amount of tri-n-alkylamine sufficient to neutralize the hydrochloric acid produced in the second reaction, and utilizing an aromatic liquid hydrocarbon medium and a minimum amount to facilitate precipitation of the resultant aromatic phosphite.

Abstract: A stabilizer blend composition is provided containing a phosphite of the formula: ##STR1## wherein Y.sup.1 is an alkyl and Y.sup.2 is tert-butyl, and an additive which is preferably a hindered phenolic, a thioester, a neutralizer, a UV stabilizer or a UV absorber. The composition in solid particle form exhibit reduced levels of dusting and are useful in polymer stabilization processes for stabilizing polymeric materials.

Abstract: A phosphite is provided having the formula: ##STR1## wherein Y.sup.1 is an alkyl group and Y.sup.2 is selected from the group consisting of sec-butyl and tert-butyl. A solid amorphous phosphite composition is also provided which preferably contains an aliphatic polyamine. The phosphite exhibits enhanced stability including hydrolyric and UV stability, and is useful in stabilizing thermoplastic compositions. The phosphite composition exhibits further enhancements in hydrolytic stability, and is useful in stabilizing thermoplastic compositions.

Abstract: An ultra high ortho nonyl phenol phosphite is provided in the form of a mixed ortho-para tris nonyl phenyl phosphite composition. The composition is produced by reacting PCl.sub.3 with a nonyl phenyl composition comprising (a) para-unsubstituted/ortho substituted nonyl phenol present at a level of from 98 to 99.95 percent by weight based on the total weight of the nonyl phenol composition. The phosphite composition surprisingly and unexpectedly exhibits a substantial increase hydrolyric stability over that of conventional high ortho tris nonyl phenyl phosphite. The phosphite is useful for stabilizing thermoplastic compositions, which may be then extruded or molded into articles such as film, sheet or useful thermoplastic objects.

Abstract: Thermoplastic compositions are stabilized with a phosphite of the formula: ##STR1## wherein Y.sup.1 is an alkyl and Y.sup.2 is selected from tert-butyl and sec-butyl. The phosphite is particularly effective for thermoplastics irradiated with high energy gamma-radiation. Irradiated articles made with the phosphite stabilized thermoplastic compositions exhibit improved discoloration resistance compared to various other phosphite stabilized thermoplastic compositions.

Abstract: Melt extrusion processes utilizing a neo alkyl phenyl phosphite stabilized polyolefin composition are provided. The processes exhibit reduced levels of screen pack plugging during fiber and film extrusion processes compared to processes utilizing various other phosphites.

Abstract: A diphosphite is provided derived from phosphorous trihalide, tetra alkyl hindered bisphenol, and a neoalkyl diol. The phosphites exhibit improved stability and are useful as thermal oxidative stabilizers for thermoplastic compositions.