Particle With Rough Surface And Process For Producing The Same

• US 20080020207A1
• Filed: 05/24/2005
• Published: 01/24/2008
• Est. Priority Date: 05/24/2004
• Status: Abandoned Application

• Current Assignee: Nisshinbo Industries, Inc. (Kawasaki Heavy Industries Limited)
• Original Assignee: Nisshinbo Industries, Inc. (Kawasaki Heavy Industries Limited)
• Inventors: Tsukamoto, Nami, Hashiba, Toshifumi, Kudo, Satomi, Hayakawa, Kazutoshi
• Application Number:
  US11/569,458
• Publication Number:
  US 20080020207A1
• Time in Patent Office: Days
• US Class Current: 428/402
• CPC Class Codes: C01B 33/18 Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof preparation of aerogels by dehydrating gels C01B33/158; treatment to enhance the pigmenting or filling properties C09C
• CPC Class Codes: C01P 2002/82 by IR- or Raman-data
• CPC Class Codes: C01P 2004/03 obtained by SEM
• CPC Class Codes: C08F 257/02 on to polymers of styrene or alkyl-substituted styrenes
• CPC Class Codes: C08F 265/04 on to polymers of esters
• CPC Class Codes: C08F 291/00 Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00
• CPC Class Codes: C08F 292/00 Macromolecular compounds obtained by polymerising monomers on to inorganic materials
• CPC Class Codes: C08F 293/005 using free radical "living" or "controlled" polymerisation, e.g. using a complexing agent
• CPC Class Codes: C08J 2333/00 Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
• CPC Class Codes: C08J 3/126 Polymer particles coated by polymer, e.g. core shell structures
• CPC Class Codes: C08J 7/12 Chemical modification
• CPC Class Codes: C08L 2666/02 Organic macromolecular compounds, natural resins, waxes or and bituminous materials
• CPC Class Codes: C08L 51/003 grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds C08L51/04, C08L51/06 take precedence
• CPC Class Codes: C08L 51/10 grafted on to inorganic materials
• CPC Class Codes: C09C 1/3072 Treatment with macro-molecular organic compounds
• CPC Class Codes: C09C 1/3081 Treatment with organo-silicon compounds
• CPC Class Codes: C09C 1/309 Combinations of treatments provided for in groups C09C1/3009 - C09C1/3081
• CPC Class Codes: C09C 1/407 Aluminium oxides or hydroxides
• CPC Class Codes: C09C 3/10 Treatment with macromolecular organic compounds C09C3/006 takes precedence
• CPC Class Codes: Y10T 428/2982 Particulate matter [e.g., sphere, flake, etc.]

Abstract

A particle having a rough surface and obtained from a particle (A) having grafted on the surface thereof a polymer having first functional groups and particles (B) having grafted on the surface thereof a polymer having second functional groups reactive with the first functional groups, by uniting the particle (A) with the particles (B) through chemical bonds between the first functional groups and the second functional groups. In this particle with a rough surface, the core particle has been tenaciously bonded to the protruding particles. Because of this, even when the protruding particles have an increased particle diameter, the protruding particles can be prevented from readily shedding from the core particle.

Claims

1. A rough particle characterized by comprising (A) a particle from a surface of which is grafted a polymeric compound containing a first functional group and (B) a particle from a surface of which is grafted a polymeric compound containing a second functional group capable of reacting with the first functional group, wherein the (A) particle and the (B) particle are united by chemical bonds between the first and second functional groups.

2. The rough particle of claim 1, characterized in that the chemical bonds are formed in a solvent that dissolves the polymeric compound containing the first functional group and the polymeric compound containing the second functional group.

3. The rough particle of claim 1, characterized in that the (A) particle is a spherical or substantially spherical particle.

4. The rough particle of claim 1, characterized in that the (A) particle or the (B) particle or both is an organic polymer particle.

5. The rough particle of claim 1, characterized in that the first functional group and the second functional group are each of at least one type selected from among active hydrogen groups, carbodiimide groups, oxazoline groups and epoxy groups.

6. The rough particle of claim 5, characterized in that the first functional group or the second functional group or both is a carbodiimide group.

7. The rough particle of claim 1, characterized in that the combination of the first functional group with the second functional group is a combination of at least one group selected from among hydroxyl groups, carboxyl groups, amino groups and mercapto groups with a carbodiimide group.

8. The rough particle of claim 1, characterized in that the (A) particle has an average particle size of from 0.1 to 1,000 μ

m.

9. A method of producing rough particles, characterized by mixing together (A) a particle from a surface of which is grafted a polymeric compound containing a first functional group and (B) a particle from a surface of which is grafted a polymeric compound containing a second functional group capable of reacting with the first functional group, in the presence of at least one type of solvent that dissolves the respective polymeric compounds on the surfaces of the (A) and (B) particles, and causing the first functional group to react with the second functional group.

10. The method of producing rough particles of claim 9, characterized in that at least 0.01 g of the respective polymeric compounds dissolves in 100 g of the solvent.