Acrylic-filled thermoformable acrylic sheet
AssigneeAristech Chemical Corporation
InventorsEttore Minghetti, John E. Eitel
Life of this patent
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Abstract
A monomer-rich acrylic syrup is cast including about 10% to about 20% ground acrylic particles. During curing, the particles absorb over half their weight in monomer, and a cured sheet is formed in which the matrix monomer and uncrosslinked polymer form a phase which extends through the particles, while the particles appear to be fused together. Including a crosslinker in the syrup further insures the interpenetration of the matrix phase into the swollen particles. A textured surface is formed, which is useful as an anti-slip surface in bathtubs and shower stalls, after thermoforming.
Claims5
An acrylic product comprising a matrix of polymethylmethacrylate having dispersed within it preformed particles of polymethylmethacrylate predominantly from about 0.1 mm to about 2.0 mm wherein about 70% to about 90% of the composition of said preformed particles comprises crosslinked polymethylmethacrylate, said matrix exhibiting a continuity interpenetrating said preformed particles.
Dependencies are inferred from the claim text.