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公开(公告)号：US10975240B2
公开(公告)日：2021-04-13
申请号：US16344515
申请日：2017-10-10
申请人： SANKO CO., LTD.
发明人： Akihiko Yoshizato , Hiroyuki Tano
摘要： The antioxidant according to the present invention contains a polyurethane compound represented by the following formula (1): (wherein Y1 is a residue of a diol, and plural Y1s may be the same or different, R1 is a residue of an aromatic diisocyanate, and plural R1s may be the same or different, X1 is a residue of a hindered phenol compound having at least k hindered phenolic hydroxyl groups, and plural X1s may be the same or different, m is an integer of 1 or more, n is an integer of 1 or more, and k is an integer of 2 or more).
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公开(公告)号：US20200017996A1
公开(公告)日：2020-01-16
申请号：US16336393
申请日：2017-10-04
申请人： SANKO CO., LTD.
发明人： Akihiko Yoshizato
IPC分类号： D01F6/70 , D01F6/72 , D01F6/78 , D01D1/02 , C08K3/013 , C08L75/02 , C08L75/04 , C08K3/22 , C08K5/098 , C08K3/04 , C08K3/36
摘要： A method for producing a polyurethane elastic fiber according to the present invention contains the steps of: [1] producing a polyurethane urea polymer (A) having a number average molecular weight ranging from 12,000 to 50,000, and represented by general formula (1); [2] preparing a spinning dope by adding the polyurethane urea polymer (A) to a polyurethane urea polymer (B); and [3] spinning a polyurethane elastic fiber using the spinning dope. In the formula, R1 and R2 are an alkyl group or a hydroxyalkyl group, R3 is an alkylene group, a polyethyleneoxy group or a polypropyleneoxy group, R4 is a diisocyanate residue, X is a urethane bond or a urea bond, R5 and R6 are a diisocyanate residue, P is a diol residue, Q is a diamine residue, UT is a urethane bond, UA is a urea bond, each of k, l, m and n is 0 or a positive number.
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公开(公告)号：US11618979B2
公开(公告)日：2023-04-04
申请号：US17386701
申请日：2021-07-28
申请人： SANKO CO., LTD.
发明人： Akihiko Yoshizato
IPC分类号： D01F6/70 , D01D1/02 , D01F6/72 , D01F6/78 , C08K3/013 , C08K3/04 , C08K3/22 , C08K3/36 , C08K5/098 , C08L75/02 , C08L75/04 , D01F1/02
摘要： A method for producing a polyurethane elastic fiber according to the present invention contains the steps of: [1] producing a polyurethane urea polymer (A) having a number average molecular weight ranging from 12,000 to 50,000, and represented by general formula (1); [2] preparing a spinning dope by adding the polyurethane urea polymer (A) to a polyurethane urea polymer (B); and [3] spinning a polyurethane elastic fiber using the spinning dope. In the formula, R1 and R2 are an alkyl group or a hydroxyalkyl group, R3 is an alkylene group, a polyethyleneoxy group or a polypropyleneoxy group, R4 is a diisocyanate residue, X is a urethane bond or a urea bond, R5 and R6 are a diisocyanate residue, P is a diol residue, Q is a diamine residue, UT is a urethane bond, UA is a urea bond, each of k, 1, m and n is 0 or a positive number.
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公开(公告)号：US20220018042A1
公开(公告)日：2022-01-20
申请号：US17386701
申请日：2021-07-28
申请人： SANKO CO., LTD.
发明人： Akihiko Yoshizato
IPC分类号： D01F6/70 , C08K3/013 , C08K3/04 , C08K3/22 , C08K3/36 , C08K5/098 , C08L75/02 , C08L75/04 , D01D1/02 , D01F6/72 , D01F6/78
摘要： A method for producing a polyurethane elastic fiber according to the present invention contains the steps of: [1] producing a polyurethane urea polymer (A) having a number average molecular weight ranging from 12,000 to 50,000, and represented by general formula (1); [2] preparing a spinning dope by adding the polyurethane urea polymer (A) to a polyurethane urea polymer (B); and [3] spinning a polyurethane elastic fiber using the spinning dope. In the formula, R1 and R2 are an alkyl group or a hydroxyalkyl group, R3 is an alkylene group, a polyethyleneoxy group or a polypropyleneoxy group, R4 is a diisocyanate residue, X is a urethane bond or a urea bond, R5 and R6 are a diisocyanate residue, P is a diol residue, Q is a diamine residue, UT is a urethane bond, UA is a urea bond, each of k, 1, m and n is 0 or a positive number.
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公开(公告)号：US11105020B2
公开(公告)日：2021-08-31
申请号：US16336393
申请日：2017-10-04
申请人： SANKO CO., LTD.
发明人： Akihiko Yoshizato
IPC分类号： D01F6/70 , C08L75/02 , C08L75/04 , D01F6/72 , D01F6/78 , C08K3/013 , C08K3/04 , C08K3/22 , C08K3/36 , C08K5/098 , D01D1/02
摘要： A method for producing a polyurethane elastic fiber according to the present invention contains the steps of: [1] producing a polyurethane urea polymer (A) having a number average molecular weight ranging from 12,000 to 50,000, and represented by general formula (1); [2] preparing a spinning dope by adding the polyurethane urea polymer (A) to a polyurethane urea polymer (B); and [3] spinning a polyurethane elastic fiber using the spinning dope. In the formula, R1 and R2 are an alkyl group or a hydroxyalkyl group, R3 is an alkylene group, a polyethyleneoxy group or a polypropyleneoxy group, R4 is a diisocyanate residue, X is a urethane bond or a urea bond, R5 and R6 are a diisocyanate residue, P is a diol residue, Q is a diamine residue, UT is a urethane bond, UA is a urea bond, each of k, l, m and n is 0 or a positive number.
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公开(公告)号：US20190249005A1
公开(公告)日：2019-08-15
申请号：US16344515
申请日：2017-10-10
申请人： SANKO CO., LTD.
发明人： Akihiko Yoshizato , Hiroyuki Tano
CPC分类号： C08L75/04 , C08G18/10 , C08G18/32 , C08G18/3215 , C08G18/76 , C08K5/13 , C08L2203/12 , D01F1/10 , D01F6/70 , D10B2501/02 , D10B2501/04 , D10B2509/026
摘要： The antioxidant according to the present invention contains a polyurethane compound represented by the following formula (1): (wherein Y1 is a residue of a diol, and plural Y1s may be the same or different, R1 is a residue of an aromatic diisocyanate, and plural R1s may be the same or different, X1 is a residue of a hindered phenol compound having at least k hindered phenolic hydroxyl groups, and plural X1s may be the same or different, m is an integer of 1 or more, n is an integer of 1 or more, and k is an integer of 2 or more).
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