Stock material or miscellaneous articles – Three dimension imitation or 'treated' natural product
Patent
1996-03-26
1998-12-22
Epstein, Henry F.
Stock material or miscellaneous articles
Three dimension imitation or 'treated' natural product
156 61, 428327, B32B 516
Patent
active
058516069
ABSTRACT:
The invention relates to a process for producing a thermoformable acrylic resin sheet having a granite-like appearance after thermoforming, wherein ground particles of a methyl methacrylate resin which has been slightly cross-linked by means of 0.005-0.2 wt. % of a polyfunctional monomer, said particles having a size smaller than 1 mm, are incorporated in an amount of 0.3-1.5 wt. % into a liquid methyl methacrylate matrix resin composition containing a cross-linking monomer in an amount which is sufficient for effecting cross-linking of the matrix resin to a degree which is equal to or higher than the degree of cross-linking of the ground resin particles, at least one of the resin particles and the matrix resin composition containing a coloring material providing a color difference between them, whereupon the liquid mixture is brought into a flat mold and is kept therein to allow the resin particles to settle and the mixture is then polymerized to produce the thermoformable acrylic resin sheet. The invention also relates to a thermoformable acrylic resin sheet and to shaped articles having a granite-like appearance.
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Abstract of JP-A-01 236257, Derwent Publications.
Abstract of JP-A-03 182 558, Derwent Publications.
Atohaas Holding C.V.
Epstein Henry F.
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