UV-stabilized polycarbonate moldings

Details UV-stabilized polycarbonate moldings UV-stabilized polycarbonate moldings

2006-04-10

2008-10-28

Chen, Vivian (Department: 1794)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

C428S213000, C428S332000, C428S337000, C428S339000, C428S412000, C428S483000, C428S522000

Reexamination Certificate

active

07442430

ABSTRACT:
A multi-layered product in the form of sheet, film or a three dimensional molded article is disclosed. The product comprised a first layer (A) having a thickness of 1 μm to 2 mm containing polyalkyl (meth)acrylate and 0.01 to 20 percent relative to the weight of said first layer of a UV stabilizer and a second layer (B) that contains polycarbonate. The stabilizer conforms to formula (I)wherein X denotes OR1; OCH2CH2OR1; OCH2CH(OH)CH2OR1or OCH(R2)COOR3, R1is branched or unbranched C1-C13alkyl, C2-C20alkenyl, C6-C12aryl or —CO—C1-C18alkyl, R2is H or branched or unbranched C1-C8alkyl, and R3is C1-C12alkyl; C2-C12alkenyl or C5-C6cycloalky. The product is characterized by its optical transparency and resistance to yellowing and is most suitable for glazing applications.

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