Top > Search of International Patents > METHOD FOR PRODUCING POLYLACTIC ACID MICROPARTICLES, POLYLACTIC ACID MICROPARTICLES, AND CRYSTAL NUCLEATION AGENT, MOLDED ARTICLE, AND SURFACE MODIFIER USING THE SAME

METHOD FOR PRODUCING POLYLACTIC ACID MICROPARTICLES, POLYLACTIC ACID MICROPARTICLES, AND CRYSTAL NUCLEATION AGENT, MOLDED ARTICLE, AND SURFACE MODIFIER USING THE SAME

Foreign code F120006615
File No. S2010-0409
Posted date May 16, 2012
Country WIPO
International application number 2011JP060469
International publication number WO 2011/142283
Date of international filing Apr 28, 2011
Date of international publication Nov 17, 2011
Priority data
  • P2010-108575 (May 10, 2010) JP
Title METHOD FOR PRODUCING POLYLACTIC ACID MICROPARTICLES, POLYLACTIC ACID MICROPARTICLES, AND CRYSTAL NUCLEATION AGENT, MOLDED ARTICLE, AND SURFACE MODIFIER USING THE SAME
Abstract Provided is a method for producing polylactic acid microparticles, which comprises: a preliminary step in which a polymer compound solution, which is obtained by dissolving in a first solvent a polymer compound containing structural units derived from l-lactic acid and structural units derived from d-lactic acid, is retained in a first liquid retaining part while a second solvent, which is a poor solvent of the polymer compound, is retained in a second liquid retaining part of a permeation device having two liquid retaining parts separated by a permeation membrane having pores with a diameter of 0.5 nm to 1,000 nm; and a permeation step in which the polymer compound solution retained in the first liquid retaining part is brought into contact with the second solvent by causing the polymer compound solution to permeate through the permeation membrane at a flow rate of 1 * 10-3 mL/(min.cm2) to 10,000 mL/(min.cm2).
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • NATIONAL UNIVERSITY CORPORATION GUNMA UNIVERSITY
  • Inventor
  • UEHARA, Hiroki
  • YAMANOBE, Takeshi
IPC(International Patent Classification)
Specified countries AE(UTILITY MODEL),AG,AL(UTILITY MODEL),AM(PROVISIONAL PATENT)(UTILITY MODEL),AO(UTILITY MODEL),AT(UTILITY MODEL),AU,AZ(UTILITY MODEL),BA(CONSENSUAL PATENT),BB,BG(UTILITY MODEL),BH(UTILITY MODEL),BR(UTILITY MODEL),BW,BY(UTILITY MODEL),BZ(UTILITY MODEL),CA,CH,CL(UTILITY MODEL),CN(UTILITY MODEL),CO(UTILITY MODEL),CR(UTILITY MODEL),CU(INVENTOR'S CERTIFICATE),CZ(UTILITY MODEL),DE(UTILITY MODEL),DK(UTILITY MODEL),DM,DO(UTILITY MODEL),DZ,EC(UTILITY MODEL),EE(UTILITY MODEL),EG(UTILITY MODEL),ES(UTILITY MODEL),FI(UTILITY MODEL),GB,GD,GE(UTILITY MODEL),GH(UTILITY CERTIFICATE),GM,GT(UTILITY MODEL),HN(UTILITY MODEL),HR(CONSENSUAL PATENT),HU(UTILITY MODEL),ID,IL,IN,IS,JP(UTILITY MODEL),KE(UTILITY MODEL),KG(UTILITY MODEL),KM,KN,KP(INVENTOR'S CERTIFICATE)(UTILITY MODEL),KR(UTILITY MODEL),KZ(PROVISIONAL PATENT)(UTILITY MODEL),LA,LC,LK,LR,LS(UTILITY MODEL),LT,LU,LY,MA,MD(UTILITY MODEL),ME,MG,MK,MN,MW,MX(UTILITY MODEL),MY(UTILITY-INNOVATION),MZ(UTILITY MODEL),NA,NG,NI(UTILITY MODEL),NO,NZ,OM(UTILITY MODEL),PE(UTILITY MODEL),PG,PH(UTILITY MODEL),PL(UTILITY MODEL),PT(UTILITY MODEL),RO,RS(PETTY PATENT),RU(UTILITY MODEL),SC,SD,SE,SG,SK(UTILITY MODEL),SL(UTILITY MODEL),SM,ST,SV(UTILITY MODEL),SY,TH(PETTY PATENT),TJ(UTILITY MODEL),TM(PROVISIONAL PATENT),TN,TR(UTILITY MODEL),TT(UTILITY CERTIFICATE),TZ,UA(UTILITY MODEL),UG(UTILITY CERTIFICATE),US,UZ(UTILITY MODEL),VC(UTILITY CERTIFICATE),VN(PATENT FOR UTILITY SOLUTION),ZA,ZM,ZW,EP(AL,AT,BE,BG,CH,CY,CZ,DE,DK,EE,ES,FI,FR,GB,GR,HR,HU,IE,IS,IT,LT,LU,LV,MC,MK,MT,NL,NO,PL,PT,RO,RS,SE,SI,SK,SM,TR),OA(BF(UTILITY MODEL),BJ(UTILITY MODEL),CF(UTILITY MODEL),CG(UTILITY MODEL),CI(UTILITY MODEL),CM(UTILITY MODEL),GA(UTILITY MODEL),GN(UTILITY MODEL),GQ(UTILITY MODEL),GW(UTILITY MODEL),ML(UTILITY MODEL),MR(UTILITY MODEL),NE(UTILITY MODEL),SN(UTILITY MODEL),TD(UTILITY MODEL),TG(UTILITY MODEL)),AP(BW(UTILITY MODEL),GH(UTILITY MODEL),GM(UTILITY MODEL),KE(UTILITY MODEL),LR(UTILITY MODEL),LS(UTILITY MODEL),MW(UTILITY MODEL),MZ(UTILITY MODEL),NA(UTILITY MODEL),SD(UTILITY MODEL),SL(UTILITY MODEL),SZ(UTILITY MODEL),TZ(UTILITY MODEL),UG(UTILITY MODEL),ZM(UTILITY MODEL),ZW(UTILITY MODEL)),EA(AM,AZ,BY,KG,KZ,MD,RU,TJ,TM)
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