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公开(公告)号：US20240174795A1
公开(公告)日：2024-05-30
申请号：US18448370
申请日：2023-08-11
发明人： Do Young Kim , Hyun Sik Yang , Yu Hyun Kim , Ki Yup Kim , Joo Hyun Nam , Chul Soon Moon , Ji Hae Park , Sung Won Lee , Jun Haeng Lee , Ho Seung Lee
IPC分类号： C08G63/183 , C08G63/52 , C08G63/78
CPC分类号： C08G63/183 , C08G63/52 , C08G63/785 , C08G2230/00
摘要： Provided are a biodegradable aliphatic-aromatic polyester copolymer having excellent hydrolysis resistance and high viscosity which has a carboxyl end group (CEG) content of 15 mg KOH/g or less, a ratio (Mz/Mn) of a z-average molecular weight (Mz) to a number average molecular weight (Mn) of 3 to 15, and a melt index (MI) of 5 g/10 min or less as measured under conditions of a temperature of 190° C. and a load of 2.16 kg in accordance with ASTM D 1238. A method of preparing a biodegradable aliphatic-aromatic polyester copolymer is provided, including adding a chain extender and an anti-hydrolysis agent to an aliphatic-aromatic polyester pre-copolymer over time, whereby a significant viscosity rise and improvement of hydrolysis resistance may be implemented simultaneously.
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公开(公告)号：US11987667B1
公开(公告)日：2024-05-21
申请号：US18448370
申请日：2023-08-11
发明人： Do Young Kim , Hyun Sik Yang , Yu Hyun Kim , Ki Yup Kim , Joo Hyun Nam , Chul Soon Moon , Ji Hae Park , Sung Won Lee , Jun Haeng Lee , Ho Seung Lee
IPC分类号： C08G63/52 , C08G63/183 , C08G63/78
CPC分类号： C08G63/183 , C08G63/52 , C08G63/785 , C08G2230/00
摘要： Provided are a biodegradable aliphatic-aromatic polyester copolymer having excellent hydrolysis resistance and high viscosity which has a carboxyl end group (CEG) content of 15 mg KOH/g or less, a ratio (Mz/Mn) of a z-average molecular weight (Mz) to a number average molecular weight (Mn) of 3 to 15, and a melt index (MI) of 5 g/10 min or less as measured under conditions of a temperature of 190° C. and a load of 2.16 kg in accordance with ASTM D 1238. A method of preparing a biodegradable aliphatic-aromatic polyester copolymer is provided, including adding a chain extender and an anti-hydrolysis agent to an aliphatic-aromatic polyester pre-copolymer over time, whereby a significant viscosity rise and improvement of hydrolysis resistance may be implemented simultaneously.
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公开(公告)号：US10683391B2
公开(公告)日：2020-06-16
申请号：US15541265
申请日：2015-12-31
发明人： Yu In Jung , Yu Hyun Kim , Ji Yong Park , Sung Keun Park , Gun Min Lee , Sang Hyun Moon
IPC分类号： C08G63/183 , C08G63/672 , C08G65/34 , C08J5/22 , B32B27/28 , B32B27/36
摘要： A thermoplastic elastomer resin composition for a moisture-permeable waterproof film includes a thermoplastic elastomer resin composed of a hard segment containing polybutylene terephthalate and a soft segment containing polyethylene glycol and polytetramethylene glycol, wherein the polyethylene glycol is contained in an amount of 30 to 70 wt % and the polytetramethylene glycol is contained in an amount of 1 to 10 wt %, based on the total weight of the thermoplastic elastomer resin. A moisture-permeable waterproof film formed of the elastomer composition and a moisture-permeable waterproof fabric in which the moisture-permeable waterproof film is stacked on at least one surface of a substrate fiber are also provided.
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