发明名称 |
Bulk reactive extrusion polymerization process producing aliphatic ester polymer compositions |
摘要 |
A bulk extrusion polymerization process to derive an aliphatic polyester from a suitable ester monomer, preferably epsilon -caprolactone. Novel reaction formulations containing less than 100 ppm water and having an acid value less than 0.5 mg KOH/g and preferably less than 0.2 mg KOH/g enable the polymerization of bulk monomer in an extruder in a resident time of less than 2 minutes. Different catalyst and initiator systems, processing protocols, and screw configurations lead to the preferred manufacture of poly( epsilon -caprolactone) polymer of number average molecular weight, Mn, greater than 100,000. A novel poly( epsilon -caprolactone) intermediate optionally grafted to starch, is described which has significantly different processing and use characteristics as compared to a straight-chain polycaprolactone.
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申请公布号 |
US5801224(A) |
申请公布日期 |
1998.09.01 |
申请号 |
US19960639198 |
申请日期 |
1996.04.26 |
申请人 |
BOARD OF TRUSTEES OPERATING MICHIGAN STATE UNIVERSITY |
发明人 |
NARAYAN, RAMANI;KRISHNAN, MOHAN;SNOOK, JOSEPH B.;GUPTA, AJAY;DUBOIS, PHILIPPE |
分类号 |
C08J3/20;C08G63/08;C08G63/12;C08G63/78;C08G63/82;C08J5/18;C08L3/00;C08L67/00;C08L67/04;(IPC1-7):C08G63/08 |
主分类号 |
C08J3/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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