Process for producing particles

Patent metadata

Field	Value
Publication number	US-9796831-B2
Application number	US-201214114682-A
Country	US
Kind code	B2
Filing date	Apr 24, 2012
Priority date	May 12, 2011
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

A process for producing particles, the process including pulverizing particles of a compound represented by formula (I) with a median diameter (50% D) of over 100 μm by using a pulverizer in the presence of at least one member selected from the group consisting of silica, talc and clay, to obtain particles of the compound represented by formula (I) with a median diameter (50% D) of 100 μm or less,

in formula (I), R 1 and R 2 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, or alternatively, R 1 and R 2 are inked to each other to form a ring together with the nitrogen atom to which they are bound, m represents an integer of 2 to 9, M n+ represents H + or an n-valent metal ion, and n represents an integer of 1 or 2.

First claim

The invention claimed is:

1. A process for producing particles, the process comprising pulverizing particles of a compound represented by formula (I) with a median diameter (50% D) of over 100 μm by using a pulverizer in the presence of at least one member selected from the group consisting of silica, talc and clay, to obtain particles of the compound represented by formula (I) with a median diameter (50% D) of 100 μm or less,

in formula (I), R 1 and R 2 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, or alternatively, R 1 and R 2 are linked to each other to form a ring together with the nitrogen atom to which they are bound,
m represents an integer of 2 to 9,
M n+ represents H + or an n-valent metal ion, and
n represents an integer of 1 or 2.

2. The process according to claim 1 , wherein the compound represented by formula (I) is a compound represented by formula (I-1):

3. The process according to claim 1 , wherein the pulverization is performed in the presence of at least one member selected from the group consisting of silica, talc and clay in an amount of 0.1 to 9 parts by mass with respect to 1 part by mass of the compound represented by formula (I).

4. The process according to claim 1 , wherein particles of a compound represented by formula (I) with a median diameter (50% D) of less than 10 μm are obtained.

5. The process according to claim 1 , wherein the pulverizer is a jet mill or a bead mill.

6. The process according to claim 1 , wherein the particles of a compound represented by formula (I) with a median diameter (50% D) of 100 μm or less are particles of a compound represented by formula (I) with a 95% particle diameter (95% D) of 50 μm or less.

7. A process for producing vulcanized rubber, the process comprising step (A) of kneading particles obtained by the process according to claim 1 , a rubber component and a filler together, step (B) of kneading the kneaded mixture obtained in the step (A), a sulfur component and a vulcanization accelerator, and step (C) of thermally treating the kneaded mixture obtained in the step (B).

Assignees

• Shiratani Hiroshi
• Sekiguchi Masahito
• Uekita Yasuo
• Sumitomo Chemical Co

Inventors

• Shiratani Hiroshi
• Sekiguchi Masahito
• Uekita Yasuo

Classifications

• Y10T428/296

  Rubber, cellulosic or silicic material in coating · CPC title

• Y10T428/1386

  Natural or synthetic rubber or rubber-like compound containing · CPC title

• C07C381/02 Primary

  Thiosulfates · CPC title

• C08K5/41 Primary

  Compounds containing sulfur bound to oxygen · CPC title

• C08L21/00

  Compositions of unspecified rubbers · CPC title