content_image/931279.jpg content_image/931280.jpg content_image/931300.jpg content_image/931260.jpg content_image/931299.jpg content_image/931281.jpg
# c12) United States Patent 

# Saito et al. 

# (54) POLYAMIDE 1010 POLYMER PARTICLES AND METHOD FOR PRODUCING SAME 

(75) Inventors: Makiko Saito, Nagoya (JP); Hiroshi Takezaki, Nagoya (JP) 

(73) Assignee: Toray Industries, Inc. (JP) 

( *) Notice: Subject to any disclaimer, the term ofthis patent is extended or adjusted under 35 U.S.C. 154(b) by 57 days. 

(21) Appl. No.: 14/345,448 

(22) PCT Filed: Jul. 11, 2012 

(86) PCT No.: PCT I JP2012/067693 § 371 (c)(l), (2), ( 4) Date: Mar. 18, 2014 

(87) PCT Pub. No.: WO2013/046860 

PCT Pub. Date: Apr. 4, 2013 

## (65) Prior Publication Data 

US 2014/0349113 Al Nov. 27, 2014 

## (30) Foreign Application Priority Data 

<img src='content_image/931279.jpg'>

(51) Int. Cl. 

<img src='content_image/931280.jpg'>

(52) U.S. Cl. CPC .............. C0SJ 3/14 (2013.01); C0SG 181603 (2013.01); C0SG 69/26 (2013.01); C0SL 77106 (2013.01); 

(Continued) 

(Continued) 

<img src='content_image/931300.jpg'>

<img src='content_image/931260.jpg'>

# (IO) Patent No.: US 9,617,395 B2 

# (45) Date of Patent: Apr. 11, 2017 

(58) Field of Classification Search CPC .. ... .. ... ... ... ... ... .. ... ... ... ... .. ... ... ... ... .. C08G 18/063 

## (56) References Cited 

<img src='content_image/931299.jpg'>

<img src='content_image/931281.jpg'>

Sumitomo Kagaku 2006-I Report-Development of Spherical Polyamide Fine powder, Shinto Fine Co., 2006.* 

Primary Examiner - Holly Le 

(74) Attorney, Agent, or Firm - DLA Piper LLP (US) 

## (57) ABSTRACT 

The production of polyamide 1010 polymer particles, in which polyamide 1010 resin, a different polymer B and an organic solvent are dissolved and mixed and thereupon an emulsion is formed within a system for phase separation into two phases, being a solution phase having the polyamide 1010 resin as the main component and a solution phase having the polymer B as the main component, and thereafter a poor solvent of the polyamide 1010 resin is brought into contact therewith to precipitate the polyamide 1010 resin, wherein the formation of the emulsion is carried out at a temperature of 100° C. or higher, thereby making it possible to obtain highly crystalline polyamide 1010 particles having a high sphericity. 

US009617395B2 

(Continued) 

## U.S. PATENT DOCUMENTS 

(Continued) 

## FOREIGN PATENT DOCUMENTS 

(Continued) 

## OTHER PUBLICATIONS 

(Continued) 

## 4 Claims, 9 Drawing Sheets 

