C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 33/12 (2006.01) B29D 7/01 (2006.01) C08J 5/18 (2006.01) C08L 33/10 (2006.01) C08L 51/00 (2006.01)
Patent
CA 2075216
The invention relates to a polymethacrylate matte-finish surface and comprised of: -- A thermoplastic polymer matrix A, in the amount of 99.9-30 wt.%, comprised of a hard phase (a1) and a tot phase (a2); and -- Latex particles of a thermoelastic polymer B, in t. of 0.1-70 wt.%, incorporated in the said matrix A, which particles give rise to the matte effect. Preferably the hard phase (a1) may contain low molecular weight and/or polymer-bound UV-absorbers. The difference between index of refraction of the thermoplastic polymer A and that of the thermoelastic polymer B is at most 0.02. Despite its matte finish, the film has high transparency, is weather resistant, has low incidence of white fracture when buckled or folded, and has impact strength which does not degrade upon cooling or heating. At the same time, the film is effective as a UV filter, to protect substrates which are sensitive to UV irradiation. If necessary the film can be bonded to the substrate by roll-lamination, pressing, deep drawing, or adhesive bonding.
Evonik Roehm Gmbh
Gross Heinz
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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