发明名称 |
GLYCOLIC ACID POLYMERS AND METHOD OF PRODUCING THE SAME |
摘要 |
Described herein is a feasible, significantly simplified production method that avoids challenging lactonization steps and converts a low molecular weight aliphatic polyester, consisting of hydroxy acids and a comonomer, whose molecular weight has been increased by step-growth polymerization reactions. The molecular weight of the aliphatic polyester, based on comparison of initial and final weight average molecular weights (Mw,1/Mw,2), increased significantly at a rate which permits the use of reactive extrusion to produce high molecular weight aliphatic polyesters in a simple, economically feasible manner. |
申请公布号 |
US2016060387(A1) |
申请公布日期 |
2016.03.03 |
申请号 |
US201514934840 |
申请日期 |
2015.11.06 |
申请人 |
Teknologian tutkimuskeskus VTT Oy |
发明人 |
Gadda Thomas;Pirttimaa Minni;Harlin Ali;Harkonen Mika |
分类号 |
C08G63/80;D01F6/62;C09D167/04;C08J5/18 |
主分类号 |
C08G63/80 |
代理机构 |
|
代理人 |
|
主权项 |
1. A telechelic polymers of glycolic acid obtained by a process comprising the steps of
providing glycolic acid; providing a difunctional monomer; subjecting said glycolic acid to condensation polymerization in the presence of said monomer; and continuing polymerization to provide a polymeric chain formed by residues derived from glycolic acid and said difunctional monomer. |
地址 |
Espoo FI |