Abstract: Stabilizer compositions having a stabilizing amount of at least one co-active agent; an ultraviolet light absorber chosen from an ortho-hydroxy benzophenone, and/or an ortho-hydroxyphenyl benzotriazole; and a hindered amine light stabilizer, are provided herein, along with masterbatch concentrates containing same, and processes for using same for stabilizing polymeric organic materials to protect against light and thermal degradation due to exposure to UV irradiation.

Abstract: A stabilizer composition for producing a polymeric hollow article in a rotomolding process has stabilizing amounts of: (i) at least one chroman-based compound according to Formula (V): wherein at least one instance of R21 is OR27, R27 is COR?? or Si(R28)3, and R??, R22, R23 R24, R25 and R26 are as defined herein; (ii) at least one phosphite or phosphonite; and (iii) a basic co-additive selected from alkali metal or alkaline metal salts of higher fatty acids. A polymeric hollow article is made by a process comprising: a) filling a mold with a polyolefin and a stabilizing amount of the stabilizer composition described herewith; b) rotating the mold around at least one axis while heating the mold in an oven, thereby fusing the composition and spreading it to the walls of the mold; c) cooling the mold; and d) opening the mold to remove the resulting polymeric hollow article.

Abstract: Polyolefin compositions of a polyolefin, a chroman-based compound according to Formula (V): and a basic co-additive selected from alkali metal or alkaline metal salts of higher fatty acids are disclosed. Amounts of the chroman-based compound and the basic co-additive are selected to enhance processing stability of the polyolefin composition when subjected to extrusion, even in the absence of antistatic agents and organic phosphites and phosphonites. Masterbatch compositions of a first polyolefin, the chroman-based compound and the basic co-additive can be blended with a second polyolefin, identical to, or compatible with, the first polyolefin to form a stabilized polyolefin composition. Molded articles produced by molding the polyolefin compositions are also disclosed. R21, R22, R23, R24, R25, R26, and R27 are also described.

Abstract: The cycle time of polymer compositions subjected to a rotomolding process is improved (i.e.

Abstract: Stabilizer compositions having a chroman-based compound according to Formula (V): and their use in processes for stabilizing organic materials subject to degradation and/or discoloration due to the effects from light, oxygen and heat, and in processes for producing articles from organic materials blended therewith, are provided herein.

Abstract: Stabilizer compositions having a stabilizing amount of at least one co-active agent; an ultraviolet light absorber chosen from orthohydroxyphenyl triazine compounds and/or benzoxazinone compounds; and a hindered amine light stabilizer, are provided herein, along with masterbatch concentrates containing same, and processes for using same for stabilizing polymeric organic materials to protect against light and thermal degradation due to exposure to UV irradiation.

Abstract: Stabilizer compositions having a stabilizing amount of at least one co-active agent; and a stabilizing amount of any one or more ultraviolet light absorber chosen from an ortho-hydroxyphenyl triazine, an ortho-hydroxy benzophenone, or an ortho-hydroxyphenyl benzotriazole, optionally in combination with a stabilizing amount of a hindered amine light stabilizer, are provided herein, along with masterbatch concentrates containing same, and processes for using same for stabilizing organic materials to protect against light and thermal degradation due to exposure to UV irradiation.

Abstract: Granular stabilizer compositions including concentrated blends of one or more polymer additive, and one or more co-active agent, which compositions are low-dusting and substantially free of a carrier polymer resin are disclosed herein, along with process for making the stabilizer compositions, and uses of such stabilizer compositions for providing enhanced protection of polymer resins against deleterious effects from air (oxygen), residual catalyst, mechanical stress, heat, and light.

Abstract: Granular stabilizer compositions including concentrated blends of one or more polymer additive, and one or more co-active agent, which compositions are low-dusting and substantially free of a carrier polymer resin are disclosed herein, along with process for making the stabilizer compositions, and uses of such stabilizer compositions for providing enhanced protection of polymer resins against deleterious effects from air (oxygen), residual catalyst, mechanical stress, heat, and light.

Abstract: Stabilizer compositions having a stabilizing amount of at least one co-active agent; and a stabilizing amount of any one or more ultraviolet light absorber chosen from an ortho-hydroxyphenyl triazine, an ortho-hydroxy benzophenone, or an ortho-hydroxyphenyl benzotriazole, optionally in combination with a stabilizing amount of a hindered amine light stabilizer, are provided herein, along with masterbatch concentrates containing same, and processes for using same for stabilizing organic materials to protect against light and thermal degradation due to exposure to UV irradiation.

Abstract: Stabilizer compositions having a chroman-based compound according to Formula (V): and their use in processes for stabilizing organic materials subject to degradation and/or discoloration due to the effects from light, oxygen and heat, and in processes for producing articles from organic materials blended therewith, are provided herein.

Abstract: The cycle time of polymer compositions subjected to a rotomolding process is improved (i.e.