Multilayer composition and process of making

Patent metadata

Field	Value
Publication number	US-2018355486-A1
Application number	US-201615778988-A
Country	US
Kind code	A1
Filing date	Nov 25, 2016
Priority date	Nov 27, 2015
Publication date	Dec 13, 2018
Grant date	—

Abstract

The present invention relates to a composition in the form of sheet or layer comprising a layer of an aromatic polymer and a layer of metal adhering to at least one side of said polymeric sheet, and to its uses.

First claim

1 . A composition (C) in the form of a sheet or film, comprising at least a layer (a) comprising an aromatic polymer (polymer P) and a layer (b) of a metal compound (M1) coated on at least one side of layer (a), wherein the thickness of the layer (a) is from 1 to 10 micrometers and the thickness of layer (b) is 100 to 1500 nanometers.

2 . The composition (C) according to claim 1 , wherein polymer (P) is selected from a polyaryletherketone, a polysulfone, or mixtures thereof.

3 . The composition (C) according to claim 2 , wherein the polyaryletherketone comprises at least a polyether ether ketone.

4 . The composition (C) according to claim 1 , wherein the thickness of layer (a) is in the range from 3 to 8 micrometers and/or the thickness of layer (b) is from 250 to 1500 nanometers.

5 . The composition (C) according to claim 1 , wherein the metal compound (M1) is selected from the group consisting of:
i. Cu, Al, Ni, Pd, Ag, Au, Co and alloys thereof, ii. non-doped metal oxides selected from the group consisting of: SiO x , ZnO, In 2 O 3 , SnO 2 and mixtures thereof, wherein x is comprised between 0.5 and 2, iii. Sn- or Al-doped metal oxides selected from the group consisting of ZnO, In 2 O 3 , SnO 2 , CdO, and mixtures thereof, and iv. Zn 2 SnO 4 , ZnSnO 3 , Zn 2 In 2 O 5 , Zn 3 In 2 O 6 , In 2 SnO 4 , CdSnO 3 and mixtures thereof.

6 . A process for the preparation of a composition (C) according to claim 1 , the process comprising the steps of:
treating, on at least one sheet comprising a layer (L1), at least one surface (S1) of the layer (L1) with a radio-frequency glow discharge process in the presence of an etching gas medium, wherein layer (L1) consists of a composition (C1) comprising at least one aromatic polymer (P), said layer (L1) having two opposite surfaces; and applying by electroless deposition a layer (L2) onto the at least one treated surface (S1), said layer (L2) comprising at least one metal compound (M1); optionally, repeating the treating and applying steps on an untreated side of layer (L1).

7 . The process according to claim 6 , wherein the radio-frequency glow discharge process is carried out at a radio-frequency comprised between 1 kHz and 100 kHz, and/or the radio-frequency glow discharge process is carried out at a voltage comprised between 1 kV and 50 kV.

8 . The process according to claim 6 , wherein the etching gas medium is selected from the group consisting of air, N 2 , NH 3 , CH 4 , CO 2 , He, O 2 , H 2 and mixtures thereof.

9 . An electric or electronic device comprising a composition (C) according to claim 1 .

10 . The device according to claim 10 , wherein the device is a loudspeaker, optionally a micro loudspeaker, or a microphone, and wherein a diaphragm of the device is formed at least partially of the composition (C).

11 . The composition (C) according to claim 1 , wherein layer (a) consists of a polymer (P), and wherein polymer (P) is selected from a polyaryletherketone, a polysulfone, or mixtures thereof.

12 . The composition (C) according to claim 3 , wherein the polyaryletherketone consists of a polyether ether ketone.

13 . The composition (C) according to claim 4 , wherein the thickness of layer (a) is in the range from 4 to 6 micrometers and the thickness of layer (b) is from 250 to 1500 nanometers.

14 . The process according to claim 6 , wherein composition (C1) consists of at least one aromatic polymer (P).

Assignees

• Solvay Specialty Polymers It

Inventors

• Cojocaru Paula
• Oriani Andrea Vittorio
• Mauri Stefano
• Apostolo Marco

Classifications

• C23C18/30

  Activating {or accelerating or sensitising with palladium or other noble metal} · CPC title

• H04R31/003

  for diaphragms or their outer suspension · CPC title

• C23C18/22

  Roughening, e.g. by etching · CPC title

• C23C18/44

  using reducing agents · CPC title

• C08G65/4012

  Other compound (II) containing a ketone group, e.g. X-Ar-C(=O)-Ar-X for polyetherketones · CPC title