Pressure-sensitive PVC cover strip
AssigneeCarlisle Intangible Company
InventorMichael J. Scanish
Life of this patent
Estimating the term…
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.
Claims15
A PVC cover strip for sealing a transition to a PVC membrane on a roof, the PVC cover strip comprising:
- a PVC layer having a first surface and a second surface and defining opposing edges across a width, the first surface configured to be exposed to weather;
- a barrier layer coating the second surface, the barrier layer being effective to prevent chemical migration from the PVC layer from passing through the barrier layer;
- a primer layer coating the barrier layer;
- and
- a pressure-sensitive adhesive layer coating the primer layer and extending from one edge of the PVC layer to the opposing edge of the PVC layer across the width,
- wherein the barrier layer is an acrylonitrile rubber.
A method of manufacturing a PVC cover strip for sealing a transition to a PVC membrane on a roof, the method comprising:
- applying a barrier layer of an acrylonitrile rubber to a PVC layer having a first surface and a second surface and defining opposing edges across a width, the first surface configured to be exposed to weather;
- the barrier layer coating the second surface and being effective to prevent chemical migration from the PVC layer from passing through the barrier layer;
- allowing the barrier layer to set;
- coating the set barrier layer with a primer layer defining opposing edges across a width;
- allowing the primer layer to set;
- and
- laminating the set primer layer with a pressure-sensitive adhesive layer and a release sheet,
- wherein following laminating, the pressure-sensitive adhesive layer extends from one edge of the PVC layer to an opposing edge of the PVC layer across the width.
Dependencies are inferred from the claim text.