US 12,012,494 B2
Multilayer body, comprising a substrate layer containing polycarbonate, talc and wax
Christopher Schirwitz, Leverkusen (DE); Michael Erkelenz, Duisburg (DE); Birte Sämisch, Cologne (DE); Rainer Protte, Dormagen (DE); Martin Döbler, Düsseldorf (DE); and Eckhard Wenz, Cologne (DE)
Assigned to Covestro Deutschland AG, Leverkusen (DE)
Appl. No. 16/956,532
Filed by Covestro Deutschland AG, Leverkusen (DE)
PCT Filed Dec. 12, 2018, PCT No. PCT/EP2018/084605
§ 371(c)(1), (2) Date Jun. 19, 2020,
PCT Pub. No. WO2019/121256, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 17208573 (EP), filed on Dec. 19, 2017.
Prior Publication US 2022/0135755 A1, May 5, 2022
Int. Cl. C08J 7/06 (2006.01); C08K 3/04 (2006.01); C08K 3/34 (2006.01); C08K 3/38 (2006.01); C08K 7/24 (2006.01); C23C 14/20 (2006.01); C23C 14/58 (2006.01)
CPC C08J 7/06 (2013.01) [C08K 3/04 (2013.01); C08K 3/34 (2013.01); C08K 3/38 (2013.01); C08K 7/24 (2013.01); C23C 14/20 (2013.01); C23C 14/58 (2013.01); C08J 2369/00 (2013.01); C08J 2423/26 (2013.01); C08K 2003/385 (2013.01); C08K 2201/003 (2013.01)] 15 Claims
 
1. A multilayer body comprising
I) a substrate layer (S),
II) a metal layer (M) bonded directly to the substrate layer and
III) optionally a protective layer (P) atop the metal layer, wherein the substrate layer comprises a composition obtained by mixing components A)-C) and optionally component D), wherein
A) is a polycarbonate,
B) is an unsized talc having a median particle diameter D50 of 0.01 to 9.5 μm, where the particle diameter D50 is determined by sedimentation analysis,
C) is at least one anhydride-modified alpha-olefin polymer having an acid number of at least 30 mg KOH/g, determined by means of potentiometric titration with alcoholic potassium hydroxide solution according to DIN ISO 17025:2005, and an average molecular weight MW of 4000 to 40 000 g/mol, where the average molecular weight MW is determined by means of gel permeation chromatography in ortho-dichlorobenzene at 150° C. with polystyrene calibration,
and optionally
D) a portion of the amount of component B) may be replaced by at least one filler different from the unsized talc selected from the group consisting of an expanded graphite having a particle diameter D50 of less than 800 μm or a mixture of the aforementioned expanded graphite with unexpanded graphite and a boron nitride, where, in the case of graphite, up to 8 parts by weight of the amount of component B) may be replaced and where, in the case of boron nitride, up to 15 parts by weight of the amount of component B) may be replaced,
wherein the amounts of components B) and C) prior to mixing with component C) are matched to one another such that, for every 10 parts by weight of component B), 0.10 to 1.4 parts by weight of component C) are used, and wherein the composition is free of graft polymers and polyesters.