Certainteed Corporation

George Atkins Walrath

Choung-Houng Lai

Paul Ruede

Nicky Chan

Olivia Gady

The present disclosure relates generally to polyurethane matrix composite materials, for example, suitable for making an exterior cladding product for houses and other buildings. The present disclosure relates more particularly to a polymer matrix composite material including a polyurethane matrix and an inorganic filler in a range from 45% to 85% by weight of the composite material. The inorganic filler includes a first substance from the group consisting of calcium carbonate, sand, talc, kaolin clay, dolomite, feldspar and mica and any mixture thereof, and fly ash, and/or an iron oxide in a range from 0.5% to 7% by weight of the inorganic filler.

Polyurethane composite material, article comprising the material and method of manufacture

A variegated polymeric article such as a variegated siding panel having improved depth of color and a three-dimensional appearance is formed having a substantially clear, methacrylic acid based capstock coextruded to a tinted polyvinyl chloride based substrate material. A specially formulated streaker pellet provides accent color streaks within the capstock to simulate a wood grain appearance. The use of a clear capstock material eliminates the need for capstock tinting necessary in the prior art to color match the capstock to the substrate material in post formed variegated vinyl sidings. Titanium dioxide may also be introduced in small amounts to the capstock to provide further ultraviolet light protection to the underlying tinted polyvinyl chloride based substrate material.

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Jackson, MI, United States of America

George Atkins Walrath