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US 4,235,948 AGranted
Simulated stone article and method for making same
AssigneeRoyal Marble Company, Inc.
InventorDonald F. Holmes
Life of this patent
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AssigneeRoyal Marble Company, Inc.
InventorDonald F. Holmes
Estimating the term…
In one exemplar embodiment a simulated stone article having a pre-formed acrylic sheet "skin" is integrally bonded to a simulated stone matrix layer. The surface of the acrylic "skin" is cleaned with an inert organic solvent to make the surface more receptive to molecular bonding. A coat of urethane is applied to the acrylic "skin" surface and permitted to cure. The simulated stone matrix is a composition including a catalyzed polyester bonding resin, a simulated stone aggregate mix, coloring, veining and pigmentation agents and an exothermic reducing agent for slowing the setting time and lowering the temperature of the bonding resin for permitting greater flexing of the composition during shrinkage of the resin while curing for improving the bond between the acrylic "skin" and cured urethane, and the bonding resin of the simulated stone matrix.
The method of forming a simulated stone product having an integral acrylic resin surface, comprising the steps of
The method of forming a reinforced simulated stone product having an integral acrylic resin surface, comprising the steps of
A simulated stone article having an integral acrylic resin surface, comprising
Dependencies are inferred from the claim text.