发明名称 |
Biologically degradable polyester, materials made from the polyester and production process |
摘要 |
PCT No. PCT/EP96/03879 Sec. 371 Date Aug. 14, 1998 Sec. 102(e) Date Aug. 14, 1998 PCT Filed Sep. 4, 1996 PCT Pub. No. WO97/09364 PCT Pub. Date Mar. 13, 1997The invention concerns biologically degradable polyesterS which are degraded under the action of micro-organisms in the natural environment. Said polyesters are high molecular weight satistical copolyesters which are made using an aliphatic polyalcohol, an aromatic polycarboxylic acid and also an aliphatic polycarboxylic acid as monomer components. They contain constitutional repeating or recurrent units comprising (i) a polyalcohol and an aromatic polycarboxylic acid and (ii) a polyalcohol and an aliphatic polycarboxylic acid, where over 90% of the units of type (i) are directly bonded with none or at most one other unit of type (i). The polyesters are produced by using a di-isocyanate as an additional monomer component, less isocyanate being used than any of the other monomer components. The present invention also concerns materials made from said biodegradable polyester and a process for producing said polyesters.
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申请公布号 |
US6150490(A) |
申请公布日期 |
2000.11.21 |
申请号 |
US19980043011 |
申请日期 |
1998.08.14 |
申请人 |
DEGUSSA-HUELS AG |
发明人 |
DECKWER, WOLF-DIETER;MUELLER, ROLF JOACHIM;WITT, UWE;ARNING, HANS-JUERGEN |
分类号 |
C08G18/42;(IPC1-7):C08G18/34 |
主分类号 |
C08G18/42 |
代理机构 |
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