Retarding depolymerization of poly(methyl methacrylate) grafted onto a propylene polymer
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United States of America Patent
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Jan 12, 1999
Grant Date -
N/A
app pub date -
Dec 19, 1996
filing date -
Dec 19, 1996
priority date (Note) -
Expired
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Abstract
Depolymerization during melt processing of poly(methyl methacrylate) that is grafted onto a backbone of propylene polymer material is retarded by adding 0.025 parts to 5.0 parts of a hydroxylamine compound per hundred parts of the graft copolymer. The methyl methacrylate can be copolymerized with another monomer such as methylacrylate.
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