Nanoparticle dispersed structure and laminate thereof

• US 6,592,945 B2
• Filed: 03/02/2001
• Issued: 07/15/2003
• Est. Priority Date: 03/03/2000
• Status: Expired due to Term

• Current Assignee: Director-General of National Institute of Advanced Industrial Science & Technology Ministry of Economy Trade and Industry, Dow, Inc., National Institute of Advanced Industrial Science and Technology Ministry of Economy Trade and Industry
• Original Assignee: Director-General of National Institute of Advanced Industrial Science & Technology, Dow, Inc.
• Inventors: Suzuki, Masaaki, Nakata, Yoshinori, Imai, Yoshiho, de los Arcos de Pedro, Maria Teresa, Yamaguchi, Munehiro, Kushibiki, Nobuo, Takeuchi, Kikuko
• Primary Examiner(s): Dawson, Robert
• Assistant Examiner(s): Feely, Michael J
• Application Number:
  US09/798,123
• Publication Number:
  US 20010019774A1
• Time in Patent Office: 865 Days
• Field of Search: 428/446, 428/447, 428/413, 428/338, 428/339, 427/384, 427/386, 427/387, 427/385.5, 427/180
• US Class Current: 427/387
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C08G 77/06 Preparatory processes C08G77/045 takes precedence
• CPC Class Codes: C08J 2383/04 Polysiloxanes
• CPC Class Codes: C08J 3/203 Solid polymers with solid and/or liquid additives
• CPC Class Codes: C08K 2201/011 Nanostructured additives
• CPC Class Codes: C08K 3/01 characterized by their specific function
• CPC Class Codes: C08K 3/08 Metals
• CPC Class Codes: C08L 2666/54 Inorganic substances
• CPC Class Codes: C08L 83/04 Polysiloxanes
• CPC Class Codes: C09D 183/04 Polysiloxanes
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

The present invention provides a nanoparticle dispersed structure featuring a polymer having a crosslinked structure that is chemically inert with respect to the nanoparticles and that is effective in suppressing diffusion, and provides a method for manufacturing this nanoparticle dispersion.

Claims

1. A method for manufacturing a nanoparticle dispersed polymer comprising the sequential steps of:

a) depositing a polymer precursor on a substrate to form a film on said substrate, wherein said precursor has a crosslinkable structure and is present in an A-stage state;

b) optionally heating said polymer precursor film, so that said polymer precursor film undergoes a transition from an A-stage state to a B-stage state;

c) depositing nanoparticles on said A-stage or B-stage polymer precursor film; and

d) heating said A-stage or B-stage polymer precursor film, resulting in crosslinking of the polymer precursor film and diffusion of said nanoparticles into the crosslinked polymer film;

wherein said nanoparticles are selected from the group consisting of metals, metal compounds, and semiconductors.

2. The method as recited in claim 1, wherein the crosslinked polymer is a polysiloxane resin having units expressed by the following formula:

3. The method as recited in claim 2, wherein the crosslinked polymer is a polysiloxane resin having unit expressed by the following formula:

4. The method as recited in claim 1, wherein the nanoparticles have a diameter of 10 nm or less.

5. The method as recited in claim 4, wherein the nanoparticles have a diameter of 1 to 5 nm.

6. The method as recited in claim 1, wherein the metal compound is titanium oxide or tin oxide.

7. The method as recited in claim 1, wherein the crosslinked polymer is selected from the group consisting of phenolformaldehyde resins, epoxy resins and polysiloxane resins.