專利名稱：Modified polyester and method for preparing the sam（美國專利第M540872號）9,156,943
專利授權與讓售
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年度(國民年)(Year)：104 |
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核准國家(Country)：US |
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專利名稱(Title)：Modified polyester and method for preparing the same |
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證書號碼(Number)：9,156,943 |
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專利類型(Type)：Invention |
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專利期間(Term)：2011-04-26~2031-04-26 |
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摘要 (Abstract) |
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| Disclosed herein are processes for manufacturing modified polyesters. An esterification reaction of diacid, diol and a branching agent having at least three carboxyl groups is carried out at a temperature of about 180 to 300°C and a pressure of about 1 to 4 bar to obtain a product of esterification. A polycondensation reaction of the product of esterification and a diamine is carried out at a pressure below about 0.01 bars to obtain the modified polyester | |
