Scratch-resistant PMMA and polycarbonate siloxane copolymer compositions
AssigneeSabic Global Technologies B.V.
InventorsPeter Vollenberg, Christopher Luke Hein, Hao Zhou, Mark Van Der Mee
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Abstract
Thermoplastic compositions include: from about 62 wt % to about 99 wt % poly(methyl methacrylate) (PMMA) or copolymers thereof; and from about 1 wt % to about 38 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt %. The compositions are scratch resistant. Scratch resistance may be determined as comprising a scratch depth of less than 20 micron (μm) as measured in accordance with the Erichsen scratch hardness test at a force of 4 Newton (N). Articles including the thermoplastic composition are also described.
Claims15
A thermoplastic composition comprising:
- from about 62 wt % to about 99 wt % poly(methyl methacrylate) (PMMA) or copolymers thereof;
- and
- from about 1 wt % to about 38 wt % of a poly(carbonate-siloxane) copolymer having a siloxane content of from about 25 wt % to about 45 wt %,
- wherein the composition is scratch resistant.
Dependencies are inferred from the claim text.