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Method for producing microparticles of polylactic acid-based resin, microparticles of polylactic acid-based resin and cosmetic using same

A technology of polylactic acid-based resin particles, applied in cosmetics, cosmetics, cosmetic preparations, etc., can solve the problems of unclear manufacturing methods of polylactic acid-based resin particles

Active Publication Date: 2014-07-23
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Patent Document 7 does not disclose specific examples of polylactic acid-based resins, and the production method of polylactic acid-based resin particles is still unclear.

Method used

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  • Method for producing microparticles of polylactic acid-based resin, microparticles of polylactic acid-based resin and cosmetic using same
  • Method for producing microparticles of polylactic acid-based resin, microparticles of polylactic acid-based resin and cosmetic using same
  • Method for producing microparticles of polylactic acid-based resin, microparticles of polylactic acid-based resin and cosmetic using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0155] The present invention will be specifically described below based on examples, but the present invention is not limited by them.

[0156] (1) Determination of melting enthalpy and crystallization temperature

[0157] Using a differential scanning calorimeter (Robot DSCRDC220 manufactured by Seiko Instruments Co., Ltd.), the temperature was raised to 200° C. under a nitrogen atmosphere at a rate of 20° C. / min. Measurement was performed based on the area of ​​the peak showing the heat of fusion near 160° C. calculate.

[0158] In addition, the crystallization temperature was measured using the above-mentioned apparatus, after raising the temperature to 200°C under the same conditions, and then measuring it at a cooling rate of 1°C / min. melting temperature.

[0159] (2) Weight average molecular weight

[0160] (i) Molecular weight measurement of polylactic acid resin (A)

[0161] The weight average molecular weight is a molecular weight calculated by comparing with a ca...

manufacture example 1

[0191] Production Example 1 Production Method 1 of Polylactic Acid

[0192]Add 70.2 g of L-lactide (manufactured by Aldrich: optical purity of 98% ee or higher), 30.1 g of D-lactide (manufactured by Aldrich: optical purity of 98% ee or higher) and 1.1 g of octanol into a stirring device In a reaction vessel, it was uniformly dissolved in a nitrogen atmosphere at 150° C., and then 0.90 g of tin octoate (manufactured by Aldrich) was added to a toluene solution adjusted to a concentration of 10% by mass in dry toluene, and polymerization was carried out for 6 hours. After completion of the polymerization reaction, the reactant was dissolved in chloroform, and reprecipitated while stirring in methanol, and the monomer and catalyst were removed to obtain a solid content. The obtained solid content was filtered, heated and vacuum-dried at 80° C. to obtain a polylactic acid-based resin having a copolymerization ratio of L / D=70 / 30, an enthalpy of fusion of 0 J / g, and a Mw (PMMA conver...

manufacture example 2

[0193] Production Example 2 Production method 2 of polylactic acid

[0194] Instead of using 49.9 g of L-lactide (manufactured by Aldrich: optical purity of 98% ee or higher), 49.8 g of D-lactide (manufactured by Aldrich: optical purity of 98% ee or higher), 0.95 g of octanol, and tin octoate (Manufactured by Aldrich) except 0.95 g, under the same conditions as in Production Example 1, a polylactic acid-based resin having a copolymerization ratio of L / D=50 / 50, an enthalpy of fusion of 0 J / g, and a Mw (PMMA conversion) of 9800 was obtained. . The SP value of this polymkeric substance is 23.14 (J / cm2) by above-mentioned calculation method 3 ) 1 / 2 .

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Abstract

Disclosed are a method for producing microparticles of a polylactic acid-based resin, porous microparticles of a polylactic acid-based resin, said microparticles having a small particle diameter, showing a high oil absorption ability and being appropriately usable for cosmetics, smooth-surfaced microparticles of a polylactic acid-based resin, said microparticles having a spherical form, showing a narrow particle diameter distribution and being appropriately usable for toners, and cosmetics using the aforementioned microparticles of a polylactic acid-based resin. The process for producing microparticles of a polylactic acid-based resin comprises: dissolving; forming an emulsion; and particulating.

Description

[0001] This application is a division of a Chinese patent application with an application date of December 22, 2011, an application number of 201180053532.6, and an invention title of "Method for Manufacturing Polylactic Acid Resin Microparticles, Polylactic Acid Resin Microparticles, and Cosmetics Using the Microparticles" Apply. technical field [0002] The present invention relates to a method for producing polylactic acid-based resin microparticles, polylactic acid-based resin microparticles, and cosmetics using the microparticles. Background technique [0003] Unlike polymer molded products such as films, fibers, injection molded products, and extrusion molded products, polymer microparticles are used for modification and improvement of various materials by utilizing their large specific surface area and microparticle structure. Main uses include modifiers for cosmetics, additives for toners, rheology modifiers for paints, etc., diagnostic test agents for medical use, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/14C08L67/04A61K8/85A61K8/02
CPCA61K8/0241A61K8/0279A61K8/85A61K2800/412A61Q1/02A61Q1/10C08J3/14C08J9/26C08J9/28C08J2367/04G03G9/0804G03G9/08722G03G9/08762G03G9/08775Y10T428/2982C08G63/08C08G63/81G03G9/0802G03G9/0821
Inventor 竹崎宏小林博斋藤真希子浅野到
Owner TORAY IND INC
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