Abstract: The present invention is a wall panel assembly for securing a protective and/or decorative panel to a wall, such as the exterior wall of a building. The panel includes a rail and channel arrangement along each edge of the panel designed to slideably engage panel clips having a cooperative guide rail and channel. The clips are used to secure the panel to a wall using common fasteners, such as screws.

Abstract: The present invention is a wall panel assembly for securing a protective and/or decorative panel to a wall, such as the exterior wall of a building. The panel includes a rail and channel arrangement along each edge of the panel designed to slideably engage panel clips having a cooperative guide rail and channel. The clips are used to secure the panel to a wall using common fasteners, such as screws.

Abstract: It has been discovered that using n-butylmethyldimethoxysilane (BMDS) as an external electron donor for Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties. The catalyst systems of the invention provide for controlled chain defects/defect distribution and thus a regulated microtacticity. Consequently, the curve of storage modulus (G?) v. temperature is shifted such that the film achieves the same storage modulus at a lower temperature enabling faster throughput of polypropylene film through a high-speed tenter.