POROUS BODY, AND METHOD FOR PRODUCING POROUS BODY

• US 20180086891A1
• Filed: 03/30/2016
• Published: 03/29/2018
• Est. Priority Date: 04/02/2015
• Status: Active Grant

• Current Assignee: Nitto Denko Corporation
• Original Assignee: Nitto Denko Corporation
• Inventors: SAOMOTO, Kenjiro, MATSUO, Naoyuki
• Granted Patent: US 10,640,623 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 27/00 Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18
• CPC Class Codes: B32B 27/281 comprising polyimides
• CPC Class Codes: B32B 27/285 comprising polyethers
• CPC Class Codes: B32B 27/322 comprising halogenated polyolefins, e.g. PTFE
• CPC Class Codes: B32B 27/325 comprising polycycloolefins
• CPC Class Codes: C08G 77/04 Polysiloxanes
• CPC Class Codes: C08G 77/06 Preparatory processes C08G77/045 takes precedence
• CPC Class Codes: C08J 2201/00 Foams characterised by the foaming process
• CPC Class Codes: C08J 2205/02 the finished foam itself being a gel or a gel being temporarily formed when processing the foamable composition
• CPC Class Codes: C08J 2205/04 characterised by the foam pores
• CPC Class Codes: C08J 2205/05 Open cells, i.e. more than 50% of the pores are open
• CPC Class Codes: C08J 2383/04 Polysiloxanes
• CPC Class Codes: C08J 2483/04 Polysiloxanes
• CPC Class Codes: C08J 9/28 by elimination of a liquid phase from a macromolecular composition or article, e.g. drying of coagulum
• CPC Class Codes: C08J 9/365 Coating
• CPC Class Codes: C08J 9/42 with macromolecular compounds

Abstract

According to the present invention, there are provided a porous body comprising a porous silicone substrate having communicating pores and a three-dimensional network silicone skeleton which forms the pores and which is formed by a copolymerization of a bifunctional alkoxysilane and a trifunctional alkoxysilane, and a polymeric cover material covering at least a part of a surface of the silicone skeleton, and an a method for producing the porous body. The porous body of the present invention has high flexibility and is strong to tension.

Claims

1. A porous body comprising a porous silicone substrate having communicating pores and a three-dimensional network silicone skeleton which forms the pores and which is formed by a copolymerization of a bifunctional alkoxysilane and a trifunctional alkoxysilane;

and a polymeric cover material covering at least a part of a surface of the porous silicone skeleton.

2. The porous body according to claim 1, wherein the polymeric cover material comprises at least one polymeric material selected from the group consisting of silicone, polyimide, polytetrafluoroethylene, polyether ether ketone, polybenzoxazole, polybenzothiazole, polybenzoxazinone, polybenzoimidazole, polyquinazolinedione and polyoxadiazole.

3. The porous body according to claim 1, having an elastic modulus at 20% strain of 0.01 MPa or more.

4. The porous body according to claim 1, having a compressive stress at 80% strain of 0.6 MPa or less.

5. A porous body having an elastic modulus at 20% strain of 0.01 MPa or more and a compressive stress at 80% strain of 0.6 MPa or less.

6. A method for producing a porous body, comprising a covering step of covering, with a polymeric cover material, at least a part of a surface of a porous silicone substrate having communicating pores and a three-dimensional network silicone skeleton which forms the pores and which is formed by a copolymerization of a bifunctional alkoxysilane and a trifunctional alkoxysilane.

7. The method according to claim 6, wherein the covering step comprises dipping the porous silicone substrate in a solution of a polymeric material for forming the polymeric cover material, and then taking the porous silicone substrate out of the solution.

8. The method according to claim 7, wherein the solution contains the polymeric material in a concentration of from 0.5 to 5% by weight.

9. The method according to claim 6, wherein the polymeric cover material comprises at least one polymeric material selected from the group consisting of silicone, polyimide, polytetrafluoroethylene, polyether ether ketone, polybenzoxazole, polybenzothiazole, polybenzoxazinone, polybenzoimidazole, polyquinazolinedione and polyoxadiazole.