Polycarbonate blend and method of producing the same
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United States of America Patent
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Apr 11, 2017
Grant Date -
Mar 12, 2015
app pub date -
Mar 5, 2013
filing date -
Apr 10, 2012
priority date (Note) -
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Abstract
A blend comprising from 50 to 95 percent by weight polycarbonate; and from 5 to 50 percent by weight modified methyl methacrylate polymer, wherein the modified methyl methacrylate polymer is selected from the group consisting of modified methyl methacrylate homopolymer, modified methyl methacrylate copolymers, and combinations thereof; wherein the modified methyl methacrylate polymer has one or more end groups provided by reaction with one or more chain transfer agents selected from the group consisting of mercapto esters, cycloalkyl and substituted cycloalkyl thiols, hydroxyl thiols, aryl and substituted aryl thiols, and aminoalkyl thiols, wherein the modified methyl methacrylate polymer has a Mw from 5,000 to 100,000 g/mole; and wherein the blend exhibits a pencil hardness equal to or greater than F measured according to ASTM D3363-05 is provided. A method for preparing a polycarbonate/modified methyl methacrylate blend is also provided.
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