Unlock instant, AI-driven research and patent intelligence for your innovation.

Porous resin microparticles and method for producing the same

A manufacturing method and porous technology, applied in pharmaceutical formulations, cosmetic preparations, cosmetic preparations, etc., can solve problems such as poor productivity, great labor to remove impurities, and adverse effects caused by the environment, and achieve optical properties Excellent, narrow particle size distribution effect

Active Publication Date: 2021-07-09
SEKISUI PLASTICS CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, in Patent Documents 1 to 4, since multi-stage steps such as dissolution or precipitation and drying are required, not only the productivity is poor, but also a large amount of waste solvent containing impurities is generated.
If the waste solvent is discharged, there is a high possibility of causing adverse effects on the environment, and the treatment of removing impurities for reuse requires a lot of labor.
In addition, there is a high possibility of generating substances that may cause adverse effects on the environment during disposal
Moreover, there must be a small amount of solvent remaining in the obtained powder, and this residual solvent may have an adverse effect on the quality of the final product.
For example, when used in the field of cosmetics or coatings, there may be concerns that the optical properties cannot be fully exhibited.
[0014] In addition, in Patent Document 5, since the particles are obtained by cutting the strands, they are not fine particles with uniform particle diameters.
Moreover, its shape is cylindrical, so it is difficult to satisfy the physical properties (such as porosity) required by various additives

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Porous resin microparticles and method for producing the same
  • Porous resin microparticles and method for producing the same
  • Porous resin microparticles and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0126] Into a 1500mL autoclave, 36g of polybutylene succinate (GS-Pla number manufactured by Mitsubishi Chemical Corporation: FZ-71PD, PBS, melting point: 113°C) as a biodegradable resin and 1164g of 3-methoxy 3-Methyl-1-butanol (Sol-fit Fine grade manufactured by Kuraray Co., Ltd.) was used as a solvent, and stirred at a heating stirring temperature of 120° C. and a stirring rotation speed of 600 rpm for 60 minutes.

[0127] Then, the contents were taken out after allowing to cool naturally (60 minutes to 25° C.) while maintaining the number of rotations of the stirring. By subjecting the contents to dehydration / filtration / drying, such as figure 2 The porous resin microparticles shown in the electron micrographs of (a) and (b). figure 2 (a) is a 200 times photo, figure 2 (b) is a photograph of 1500 times.

Embodiment 2a

[0129] In addition to using 60 g of polylactic acid (Unitika company's Terramac number: TE-2500, melting point: 166 ° C) as a biodegradable resin, and using 1140 g of 3-methoxy-3-methyl-1-butanol (Kuraray company Sol-fit Finegrade), and the heating and stirring temperature is set to 140°C, except for rapid cooling (up to 25°C for 30 minutes) instead of natural cooling, the rest are operated in the same way as in Example 1 to obtain the following image 3 The porous resin microparticles shown in the electron micrographs of (a) and (b). image 3 (a) is a 200 times photo, image 3 (b) is a photograph of 1500 times.

Embodiment 3

[0131] In addition to using 90g of polybutylene succinate, 1110g of 3-methoxy-3-methyl-1-butanol (Sol-fit Fine grade manufactured by Kuraray Company), and rapid cooling (up to 25°C) 30 minutes) to replace natural cooling, all the other operate in the same way as in Example 1 to obtain such Figure 4 The porous resin microparticles shown in the electron micrograph of . Figure 4 For 1000 times the photo.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
oil absorptionaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The method for producing porous resin microparticles of the present invention includes: a step of heating a biodegradable polyester-based thermoplastic resin in a glycol ether-based solvent at a temperature of 80° C. to 200° C. to obtain a solution; and a step of cooling the solution to precipitate the polyester-based thermoplastic resin as porous resin fine particles.

Description

technical field [0001] The present invention relates to porous resin microparticles and a method for producing the same. Background technique [0002] Thermoplastic resin particles are used to modify and improve various materials by utilizing a large specific surface area and particle structure. The main applications include formulation agents for cosmetics such as foundations, antiperspirants, and exfoliants, paint matting agents, rheology modifiers, anti-blocking agents, slip agents, light diffusing agents, medical diagnostic test agents, etc. Seed agent, automotive materials, construction materials, etc. Additives added to molded products, etc. [0003] On the other hand, in recent years, in order to reduce the environmental load due to increasing attention to environmental issues, it is required to use materials not derived from petroleum raw materials in all fields where resins are used. This is also required in fields where resin particles are used, such as cosmetics...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/14C08J9/28
CPCC08J3/14C08J9/28C08J2367/04C08J2367/02C08J2201/0502A61K2800/28A61K2800/412A61K8/0279A61Q19/00A61K8/85A61Q1/02C09D7/65C09D7/70A61K8/0283A61K9/0002C08J2329/00
Inventor 桑垣香织日下明芳
Owner SEKISUI PLASTICS CO LTD