Pressure-sensitive PVC cover strip
AssigneeCarlisle Intangible Company
InventorMichael J. Scanish
Life of this patent
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Abstract
A PVC-based cover strip designed to bond to non-PVC materials as well as PVC materials includes a PVC layer coated with a barrier effective to prevent migration of plasticizers from the PVC layer. The barrier layer, in turn, is coated with a primer and subsequently a pressure-sensitive adhesive. The barrier layer is generally a polar polymer, such as acrylonitrile rubber which resists migration of phthalate plasticizers. The pressure-sensitive adhesive layer is a pressure-sensitive adhesive suitable for use in roofing applications.
Claims12
An edge treatment for a roof, wherein said roof is coated with a PVC membrane, said edge treatment comprising:
- a metal facia strip fixable to said roof to trap said PVC membrane between said metal facia strip and said roof;
- and
- a cover strip to bond said metal facia strip to said PVC membrane;
- wherein said cover strip includes a PVC layer having a bottom surface covered with a barrier layer effective to prevent plasticizer migration;
- wherein said barrier layer is in turn coated with a pressure-sensitive adhesive layer and said pressure-sensitive adhesive layer is bonded to said metal facia strip and positioned on said cover strip to bond to said PVC membrane.
A roof surface comprising:
- a PVC membrane adjacent a non-PVC membrane, wherein the PVC membrane is bonded to the non-PVC membrane by a cover strip,
- wherein said cover strip includes a PVC layer in turn coated with a barrier layer and a pressure-sensitive adhesive layer;
- and
- wherein an edge portion of the PVC membrane is covered with a strip of barrier layer and the edge portion of the PVC membrane and an edge portion of the non-PVC membrane are covered with a primer layer, and the pressure-sensitive adhesive layer is bonded to the primer layer on each of the edge portions.
Dependencies are inferred from the claim text.