公开(公告)号：US11285708B2

公开(公告)日：2022-03-29

申请号：US17434137

申请日：2020-02-07

申请人： Röhm GmbH ,  Roehm America LLC

发明人： Ghirmay Seyoum ,  Markus Parusel ,  Kim Struwe ,  Anderson Costa ,  Claude Guénanten ,  Helmut Häring

IPC分类号： B32B27/08 ,  C08K3/01 ,  B32B27/28 ,  B32B27/20 ,  B32B37/26 ,  B32B37/12 ,  B32B37/15 ,  B32B38/00 ,  C08J5/18 ,  C08K3/013

摘要： Heat resistant brittle films can be made from impact-modified poly(meth)acrylimide, and forgery prevention labels can contain the heat resistant brittle films. The films can be advantageously prepared by extrusion and, depending on the desired purpose, can be designed to be transparent, translucent, or entirely non-transparent, e.g., white. Ideally, the brittle films and the forgery prevention labels containing the brittle films have no intended break points such as slits, perforation, etc.

公开(公告)号：US20220024102A1

公开(公告)日：2022-01-27

申请号：US17297049

申请日：2019-11-13

申请人： Röhm GmbH

发明人： Claude Guénanten ,  Ghirmay Seyoum ,  Michael Enders ,  Herbert Groothues ,  Kim Struwe

IPC分类号： B29C48/18 ,  B29C48/00 ,  B29C48/07 ,  B29D7/01 ,  C08L33/12 ,  C08K3/40 ,  C08K5/3475 ,  C08K5/3492 ,  C08K3/22

摘要： A transparent weathering resistant foil for protection of various substrates against solar radiation contains at least two layers A and B, wherein the spectral transmittance of the layer A at any wavelength λA is not more than 10%; wherein 270 nm≤λA≤360 nm; and the spectral transmittance of the layer B at any wavelength λB is not more than 10%; wherein 270 nm≤λB≤370 nm. The foil can also contain at least two layers A and B; wherein the spectral transmittance of the layer A at any wavelength λA is not more than 20%; wherein 270 nm≤λA≤310 nm; and the spectral transmittance of the layer B at any wavelength λB is not more than 10%; wherein 270 nm≤λB≤370 nm.