Hybrid carbon black, coating composition and shielding material employing the same

Patent metadata

Field	Value
Publication number	US-9359483-B2
Application number	US-201414582481-A
Country	US
Kind code	B2
Filing date	Dec 24, 2014
Priority date	Dec 27, 2013
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A hybrid carbon black, a coating composition, and a shielding material employing the same are provided. The hybrid carbon black includes a core of carbon black, and a cross-linked network polymer film covering the whole surface of the carbon black overall. In particular, the carbon black core has a mass fractal dimension between 2 and 3 and a surface fractal dimension between 2 and 2.5, and the cross linking network polymer film includes a product obtained by crosslinking a composition including a styrene monomer and a divinylbenzene monomer.

First claim

What is claimed is:

1. A hybrid carbon black, comprising:
a core of carbon black, wherein the core of carbon black has a mass fractal dimension (Dm) between 2-3, and a surface fractal dimension (Ds) between 2-2.5; and
a cross-linked network polymer film covering the whole surface of the carbon black overall, wherein the cross-linked network polymer film comprises a product obtained by crosslinking a composition comprising a styrene monomer and a divinyl benzene monomer.

2. The hybrid carbon black as claimed in claim 1 , wherein the weight ratio of the cross-linked network polymer film and the core of carbon black is between 5-30.

3. The hybrid carbon black as claimed in claim 1 , wherein the ratio between a thickness of the cross-linked network polymer film and a particle size of the core of carbon black is between 0.1-1.0.

4. The hybrid carbon black as claimed in claim 1 , wherein a particle size of the core of carbon black is between 80-150 nm.

5. The hybrid carbon black as claimed in claim 1 , wherein the molar ratio between the styrene monomer and divinyl benzene monomer in the composition is between 10-100.

6. The hybrid carbon black as claimed in claim 5 , wherein the composition further comprises a lauryl acrylate monomer, and the molar ratio between the styrene monomer and the lauryl acrylate monomer is between 10-30.

7. The hybrid carbon black as claimed in claim 1 , wherein the composition further comprises a surfactant.

8. The hybrid carbon black as claimed in claim 7 , wherein the surfactant is an ionic surfactant or non-ionic surfactant.

9. A coating composition, comprising:
a solvent; and
the hybrid carbon black as claimed in claim 1 .

10. The coating composition as claimed in claim 9 , wherein the coating composition has a solid content between 10-60 wt %.

11. The coating composition as claimed in claim 9 , further comprising:
a dispersant, wherein the dispersant has a weight percentage of 1-30%, based on the total weight of the solvent and the hybrid carbon black.

12. A shielding material, comprising:
a layer, wherein the layer comprises the hybrid carbon black as claimed in claim 1 .

13. The shielding material as claimed in claim 12 , wherein the shielding material has a surface resistance greater than or equal to 10 10 Ω/cm 2 .

Assignees

• Ind Tech Res Inst

Inventors

• Wu Ching-Mao
• Lin Szu-Yin

Classifications

• C08K3/04 Primary

  Carbon · CPC title

• C08K9/08

  Ingredients agglomerated by treatment with a binding agent · CPC title

• C09D125/08

  Copolymers of styrene (C09D129/08, C09D135/06, C09D155/02 take precedence) · CPC title

• C09C1/56

  Treatment of carbon black {; Purification} · CPC title