Patent ID: 11866571
Assignee: SHPP GLOBAL TECHNOLOGIES B.V.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  B  H | IPC B  C

Claim 7:
8. The composition of claim 5, wherein
the composition comprises 70 to 99.95 weight percent of the polycarbonate-polysiloxane and further comprises 0.05 to 2 weight percent of a roughening agent;
the first carbonate units have the structure, the second carbonate units have the structure, , or a combination thereof;
the third carbonate units have the structure, , wherein Ar is independently at each occurrence a C6-C24 aromatic divalent group optionally substituted with 1, 2, 3, or 4 substituents, each substituent independently selected from the group consisting of halogen, C1-C6 alkyl, and C1-C6 alkoxyl; R4 is independently at each occurrence a C2-C8 divalent aliphatic group; R5 and R6 are independently at each occurrence C1-C12 alkyl or C6-Cis aryl; m and n and q are independently at each occurrence zero or 1; and p is (30-n-q) to (60-n-q);
the polycarbonate-polysiloxane has a weight average molecular weight of 20,000 to 35,000 grams/mole, determined by gel permeation chromatography using bisphenol A polycarbonate standards; and
the roughening agent comprises a particulate crosslinked polymethylsilsesquioxane having a median equivalent spherical diameter of 0.1 to 10 micrometers determined by laser diffraction according to ISO 13320:2009.