Claims
- 1. Composition for agricultural use comprising a polyolefin or olefin copolymer and, as stabilizer against the deleterious effects of light, oxygen and/or heat, a combination of
- A) a sterically hindered hydroxylamine ether containing a group of the formula ##STR23## wherein G is hydrogen or methyl; G.sub.1 and G.sub.2 are hydrogen, methyl or, taken together, are .dbd.O; and G.sup.11 is C.sub.6 -C.sub.10 alkyl or cyclohexyl, and
- B) a compound selected from simple and complex oxides, hydroxides and mixed oxides/hydroxides of main group II or III or M transition group II metals, and zeolites and hydrotalcites to achieve enhanced stabilization efficacy.
- 2. Composition according to claim 1, wherein component B is a mixture of a hydrotalcite and a simple oxide or hydroxide of a metal of main group II or III or transition group II of the periodic system.
- 3. Composition according to claim 1, wherein component B is selected from zinc oxide, zinc hydroxide, ortho and meta aluminum hydroxide, .alpha.- and .gamma.-Al.sub.2 O.sub.3, MgO, Mg(OH).sub.2, and hydrotalcites of the formulae Al.sub.2 O.sub.3.6MgO.CO.sub.2.12H.sub.2 O; Mg.sub.4,5 Al.sub.2 (OH).sub.13.CO.sub.3.3,5H.sub.2 O; 4MgO.Al.sub.2 O.sub.3.CO.sub.2.9H.sub.2 O; 4MgO.Al.sub.2 O.sub.3.CO.sub.2.6H.sub.2 O; ZnO.3MgO.Al.sub.2 O.sub.3.CO.sub.2.8-9H.sub.2 O; ZnO.3MgO.Al.sub.2 O.sub.3.CO.sub.2.5-6H.sub.2 O; Mg.sub.4,5 Al.sub.2 (OH).sub.13.CO.sub.3.
- 4. Composition according to claim 1, wherein component A is selected from the compounds 1-cyclohexyloxy-4-stearoyloxy-2,2,6,6-tetramethylpiperidine, bis(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)succinate, bis(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)adipate, bis(1-octyloxy-2,2,6,6-tetramethylpiperidin-4-yl)sebacate, and the compounds of formulae ##STR24## .
- 5. Composition according to claim 1 containing from 0.01 to 5% by weight of component A and from 0.005 to 6% by weight of component B, relative to the weight of the polyolefin or olefin copolymer.
- 6. Composition according to claim 4 containing from 0.005 to 3% by weight of a hydrotalcite in addition to 0.005 to 3% by weight of a simple metal oxide or hydroxide of a metal of main group II or III or transition group II of the periodic system, relative to the weight of the polyolefin or olefin copolymer.
- 7. Composition according to claim 1 containing in addition to components A and B a further component selected from further stabilizers, fillers, reinforcing agents, pigments, dyes, plasticisers, solvents, lubricants, flow-control agents, fluorescent brighteners, nucleating agents, antistatic agents or fire-retarding agents.
- 8. Composition according to claim 7 containing in addition to components A and B a further component selected from alkaline earth metal salts, zinc salts and aluminum salts of a carboxylic acid, and UV absorbers.
- 9. Composition according to claim 8 containing from 0.05 to 2% by weight of a metal carboxylate, relative to the weight of the polyolefin or olefin copolymer.
- 10. Process for the stabilization of a polyolefin or olefin copolymer composition for agricultural use against the deleterious effects of light, oxygen and/or heat, comprising incorporation of a sterically hindered hydroxylamine ether containing a group of the formula ##STR25## wherein G is hydrogen or methyl; G.sub.1 and G.sub.2 are hydrogen, methyl or, taken together, are .dbd.O; and G.sup.11 is C.sub.6 -C.sub.10 alkyl or cyclohexyl, and a compound selected from simple and complex oxides, hydroxides and mixed oxides/hydroxides of main group II or III or transition group II metals, and zeolites and hydrotalcites into the polymer to achieve enhanced stabilization efficacy.
- 11. Polyolefin or olefin copolymer composition according to claim 1 in form of a film in contact with a pesticide.
- 12. Composition according to claim 11, wherein the pesticide contains halogen and/or sulfur atoms.
- 13. Composition according to claim 11, which is a greenhouse film.
- 14. Process for the stabilization of a polyolefin or olefin copolymer film against the deleterious effects of light, oxygen, heat and/or pesticides, comprising incorporation of a sterically hindered hydroxylamine ether containing a group of the formula ##STR26## wherein G is hydrogen or methyl; G.sub.1 and G.sub.2 are hydrogen, methyl or, taken together, are .dbd.O, and G.sup.11 is C.sub.6 -C.sub.10 alkyl or cyclohexyl, and a compound selected from simple and complex oxides, hydroxides and mixed oxides/hydroxides of main group II or III or transition group II metals, and zeolites and hydrotalcites into the polymer film to achieve enhanced stabilization efficacy.
- 15. Process according to claim 14, wherein the polyolefin or olefin copolymer film is an agricultural film for applications involving pesticides.
Priority Claims (1)
Number |
Date |
Country |
Kind |
MI95A0834 |
Apr 1995 |
ITX |
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Parent Case Info
This is a continuation of application Ser. No. 08/635,815, filed on Apr. 22, 1996, now abandoned.
US Referenced Citations (13)
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GBX |
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Entry |
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Continuations (1)
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Number |
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Parent |
635815 |
Apr 1996 |
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