Polymer compound for the production of sealing elements for vess

Details Polymer compound for the production of sealing elements for vess Polymer compound for the production of sealing elements for vess

1992-03-11

1997-06-17

Tsang, Cecilia J.

Stock material or miscellaneous articles

Hollow or container type article

Nonself-supporting tubular film or bag

525 72, 525240, 525 56, 525 58, 525 60, 525123, 428 351, 428 352, 428 353, 428 354, 428 356, 428158, C08K 501

Patent

active

056395256

ABSTRACT:
The invention relates to a polymer compound for the production of sealing elements for vessel or container closures, which sealing elements when closed have a barrier effect preventing the penetration of gaseous or vaporous substances such as oxygen or aromatic compounds, in particular benzenes, phenyl ethers and suchlike into the vessel and/or show an excess pressure valve effect at interior vessel pressures of between approx. 3 and 10 bar and may be produced by mechanical forming of the unshaped thermally plastified polymer compound and its subsequent hardening directly on or in the vessel closure ("in shell" moulding), comprising a mixture of butyl and/or acrylate rubber and a polymer of an .alpha.-oleflnic unsaturated monomer as well as, if appropriate, one or several further polymer components and common additives such as glide enhancers, pigment, talcum and stabilizers. The invention further relates to a sealing element of this kind and a corresponding vessel or container closure.

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