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US 11,634,565 B2Granted
Caps or closures made from a resin composition comprising polyethylene
AssigneeTotal Research & Technology Feluy
InventorDavid Ribour
Life of this patent
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Abstract
Described herein are caps or closures made from a resin composition having at least one polyethylene having a density of at least 0.940 g/cm3 when measured following the ISO 1183-2 method at 23° C.; erucamide; and at least 700 ppm based on the total weight of the resin composition of at least one ultraviolet absorber selected from the hydroxyphenylbenzotriazole class. A process for the production of such caps or closures is also described herein.
Claims9
A cap or closure made from a resin composition comprising:
- at least one polyethylene having a density of at least 0.940 g/cm3 when measured following the ISO 1183-2 method at 23° C.;
- at least 2000 ppm based on the total weight of the resin composition of erucamide;
- at least 1000 ppm based on the total weight of the resin composition comprising 2-(2′-hydroxy-3′-t-butyl-5′-methylphenyl)-5-chlorobenzotriazol;
- wherein the at least one polyethylene is formed using at least one metallocene catalyst;
- and
- optionally, wherein the resin composition further comprises at least 1000 ppm behenamide.
3 more elements
A process for the production of a cap or closure, the process comprising:
- (a) blending at least one polyethylene having a density of at least 0.940 g/cm?' when measured following the ISO 1183-2 method at 23° C.;
- with at least 2000 ppm based on the total weight of the blend of erucamide;
- and with at least 1000 ppm based on the total weight of the blend of 2 (2′-hydroxy-3′-t-butyl-5′-methylphenyl)-5-chlorobenzotriazole,
- (b) extruding the blend,
- (c) injection moulding or compression moulding the extruded blend into a cap or closure;
- wherein the at least one polyethylene is formed using at least one metallocene catalyst.
3 more elements
Dependencies are inferred from the claim text.