Container closure with a sealing element
AssigneeSilgan Holdings Inc.
InventorsJuergen Kintscher, Andreas Maniera
Life of this patent
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Abstract
A vessel closure (1, 21, 41, 61) includes a sealing element (3, 23, 43, 63). The sealing element (3, 23, 43, 63) includes a polymer composition. The polymer composition includes a polysiphaolefin with kinematic viscosity, determined according to ASTM D445/ISO 3104, of at least 4 cSt, at a temperature of 100° C., and/or a dropping point, determined according to ASTM 5950, of at most −10° C., and up to 95% by weight of a second polyolefin.
Claims17
Vessel closure with a sealing element, whereby the sealing element comprises a polymer composition and the polymer composition comprises (a) a polyalphaolefin with a kinematic viscosity, determined according to ASTM D445/ISO 3104, of at least 4 cSt, at a temperature of 100° C., and a dropping point, determined according to ASTM 5950, of at most −10° C.;
- and (b) up to 95% by weight of a second polyolefin,
- wherein the polymer composition is free of a copolymer with styrene as a comonomer.
Vessel closure with a sealing element, whereby the sealing element comprises a polymer composition and the polymer composition comprises
- (a) a polyalphaolefin with a kinematic viscosity, determined according to ASTM D445/ISO 3104, of at least 4 cSt, at a temperature of 100° C., and a dropping point, determined according to ASTM 5950, of at most −10° C.;
- and
- (b) between 65% and 95% by weight of a second polyolefin, wherein the second polyolefin is a copolymer comprising alpha-butene and a C2, C3 or C5 to C16 (alpha-)olefin as comonomers.
Vessel closure with a sealing element, whereby the sealing element comprises a polymer composition and the polymer composition comprises
- (a) a polyalphaolefin with a kinematic viscosity, determined according to ASTM D445/ISO 3104, of at least 4 cSt, at a temperature of 100° C., and a dropping point, determined according to ASTM 5950, of at most −10° C.;
- and
- (b) up to 95% by weight of a second polyolefin, wherein the second polyolefin is a copolymer comprising propene, a C2 olefin and a C4 (alpha-)olefin as comonomers.
Dependencies are inferred from the claim text.