57  US 6,391,949 B2  58  EXAMPLE 83  EXAMPLE 80  EXAMPLE 81  EXAMPLE 84  EXAMPLE 85  EXAMPLE 86  EXAMPLE 82  Molding grade polypropylene is dry blended with test  additives and then melt compounded into pellets. In addition  to the instant compounds, selected flame retardants are also  included. The flame retardants are tris(3-bromo-2,2-bis  (bromomethyl)propyl)phosphate, decabromodiphenyl  oxide, ethylene bis-(tetrabromophthalimide ), or ethylene  bis-( dibromonorbomanedicarboximide ). The pelletized fully  formulated resin is then injection molded into test specimens  using a Boy SOM laboratory model injection molder.  Film grade polyethylene is dry blended with 10% loading  of the test additives, such as the compound of Example 51,  The films containing the instant compound mixture show  good light stabilizing efficacy.  The blown films are exposed in an Atlas Xenon-Arc  WeatherOmeter according to  ASTM  G26 at 63°  C. bpt, 0.35  W/m 2  at 340 nm with no spray cycle. Films are tested  periodically for any change in elongation using an Instron  112 tensile tester. Failure in this test is determined by  observation of the loss of % elongation in the film. The  longer it takes for this loss to occur, th more effective is the  stabilizer system.  Using the criterion for light stabilization described in  Example 79, the socks knitted from the polypropylene fiber  containing the instant compounds exhibit good light stabil› ity.  Polypropylene fiber is prepared as described in Example  79. In addition to the instant compounds, selected haloge› nated flame retardants are also included in the formulation.  The flame retardants are tris(3-bromo-2,2-bis(bromomethyl)  propyl)phosphate, decabromodiphenyl oxide, ethylene bis› ( tetrabromophthalimide ), or ethylene bis-( dibromo› norbornanedicarboximide ).  Film grade polyethylene is dry blended with approxi- mately 10% by weight of the test additives, such as the  compound of Example 51, and then melt compounded at  200° C. into "Masterbatch" pellets. The fully formulated  "Masterbatch" pellets are dry blended with polyethylene  resin to get the desired final stabilizer concentrations. Typi- cal formulations contain the instant compounds at levels  from 0.05% to 2.0%, a metal stearate such as calcium  stearate at 0.05% to 0.5%, a phosphite at 0% to 0.1 %, a  phenolic antioxidant at 0% to 1.25%, an  N,N› dialkylhydroxylamine at 0% to 0.1 % and optionally a hin› dered amine at 0% to 2.0%. The This stabilized fully  formulated resin is then blown at 200°  C. into a 150 micron  thick film on a DOLCI film line.  Effectiveness is monitored as described in Example 82.  The films containing the instant compounds exhibit good  light stability.  Greenhouse film samples are prepared as described in  Example 81, but in addition to the instant compounds also  contain a metal stearate or a metal oxide. Typical formula› tions contain from 0.05 to 2% by weight of the instant  hindered amines, 0.05 to 0.5% of a metal stearate such as  calcium oxide, and 0.05 to 0.5% of a metal oxide such as  zinc oxide or magnesium oxide.  The socks containing the instant compounds exhibit good  thermal stabilization efficacy.  Other socks of propylene fiber as prepared in Example 79  are exposed in a Blue M forced draft oven at 120°  C. Failure  is determined by the criterion set forth in Example 79. The  longer it takes for the catastrophic failure to occur, the more  effective is the stabilizing system.  The films containing the instant compounds show good  resistance to fumigants.  The resulting films are exposed on a soil to simulate  agricultural mulch film conditions. Treatment includes expo› sure to methyl bromide fumigant for three days at 60 g/m 3 Performance is measured by monitoring the time to physical  embrittlement.  Master batch pellets prepared as described in Example 81  are dry blended into polyethylene resin to get the final  stabilizer cocentration. The fully formulated resin is then  blown at 200°  C. into a 25 micron thick film using a DOLCI  film line.  The samples containing the instant compounds exhibit  good stabilization performance against the deleterious  effects of UV light.  Fiber samples are tested by performing color measure› ments on an Applied Color Systems spectrophotometer by  reflectance mode according to  ASTM D  2244-79. Identical,  but separate, fiber samples are examined for catastrophic  failure and the time to failure is recorded.  Fiber samples are knitted into socks on a Lawson› HemphillFiber Analysis Knitter, cut into appropriate lengths  and exposed in an Atlas Ci65 Xenon Arc Weather-O-meter  at 89° C. black panel temperature, 0.55 W/m 2  at 340  nanometers and 50% relative humidity (Society of Automo› tive Engineers-SAE  J  1885 Test Procedure).  The films containing the instant compounds show good  resistance to pesticides.  The resulting films are exposed on a greenhouse on  galvanized iron backing. Treatment includes applications of  pesticides on a  regular basis (i.e. sodium  N-methyidithiocarbamate,  VAPAM $^{1 }$every six months and  SESMETRIN$^{1 }$every month). Performance is measured by  monitoring the percent residual elongation. Failure is  defined as the time to a 50% loss of original elongation.  as described in Example 81, and then melt compounded at  200° C. into fully formulated master batch pellets. The  master batch pellets are dry blended with the polyethylene  resin to get the final stabilizer concentration. The fully  formulated resin is then blown at 200°  C. into a 150 micron  thick film using a DOLCI film line.  Formulations containing polypropylene, 0.05-0.1 %  phosphite, 0-1.25% phenolic antioxidant, 0-0.1 %  dialkylhydroxylamine, 0.05-0.1 % calcium stearate,  0-1.25% UV absorber, 0---1.25% hindered amine are dry  blended in a tumble dryer, extruded on a Superior/MPM 1"  single screw extruder with a general all-purpose screw (24: 1  LID) at 475°  F.  (246° C.), cooled in a water bath and  pelletized. The resulting pellets are spun into fiber at about  475°  F.  (246° C.) on a  HILLS  Research Fiber Extruder  (Model# REM-3P-24) fitted with a 41 hole, delta configua- tion spinneret. The spun tow is stretched at a draw ratio of  3.2:1 producing a final denier of 615/41. 