Methacrylic resin composition
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United States of America Patent
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Apr 14, 2020
Grant Date -
Feb 15, 2018
app pub date -
Oct 10, 2017
filing date -
Nov 9, 2012
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Abstract
A methacrylic resin composition containing 10 to 99 parts by mass of a methacrylic resin (A) containing 80% by mass or more of a methyl methacrylate unit, and 90 to 1 part by mass of a block copolymer (B) containing 10 to 60% by mass of a methacrylic acid ester polymer block (b1) and 90 to 40% by mass of an acrylic acid ester polymer block (b2), where the total of the methacrylic resin (A) and the block copolymer (B) is 100 parts by mass, where a weight-average molecular weight Mw(A) of the methacrylic resin (A), a maximum weight-average molecular weight Mw(b1) of the methacrylic acid ester polymer block (b1) and a maximum weight-average molecular weight Mw(b2) of the acrylic acid ester polymer block (b2) satisfy (1): 0.5≤Mw(A)/Mw(b1)≤2.5 and (2): 40000≤Mw(b2)≤120000.
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