公开(公告)号：US11466125B2

公开(公告)日：2022-10-11

申请号：US16721349

申请日：2019-12-19

申请人： PRC-DeSoto International, Inc.

发明人： Chandra Rao

IPC分类号： C08G75/045 ,  C09K3/10

摘要： Polythioether prepolymers that have a low nucleation temperature. The symmetry of the polythioether prepolymers is modified by including pendent groups extending from the backbone of the polythioether prepolymer chain and/or the symmetry is modified by including segments having a different number of —C(R)2— groups between heteroatoms. The polythioether prepolymers are stable at low temperature storage conditions for an extended period of time. Compositions prepared using the low nucleation temperature polythioether prepolymers are useful as sealants.

公开(公告)号：US10883016B2

公开(公告)日：2021-01-05

申请号：US16324458

申请日：2017-08-08

申请人： PRC-DeSoto International, Inc.

发明人： Bruce Virnelson ,  Chandra Rao ,  Renhe Lin

IPC分类号： C09D175/16 ,  C08G18/52 ,  C08G18/76 ,  C08G18/79 ,  C08G18/10 ,  C08G18/38 ,  C08G18/28 ,  C09D175/14 ,  C09J175/14 ,  C08G18/75

摘要： Actinic radiation-curable compositions containing polythiols and urethane/urea-containing polyalkenyl prepolymers that can be used for aerospace coatings and sealants. The coatings can be applied to surfaces and rapidly cured.

公开(公告)号：US20190169465A1

公开(公告)日：2019-06-06

申请号：US16324458

申请日：2017-08-08

申请人： PRC-DeSoto International, Inc.

发明人： Bruce Virnelson ,  Chandra Rao ,  Renhe Lin

IPC分类号： C09D175/16 ,  C08G18/76 ,  C08G18/79 ,  C08G18/38 ,  C08G18/52 ,  C08G18/10

摘要： Actinic radiation-curable compositions containing polythiols and urethane/urea-containing polyalkenyl prepolymers that can be used for aerospace coatings and sealants. The coatings can be applied to surfaces and rapidly cured.

公开(公告)号：US10047259B2

公开(公告)日：2018-08-14

申请号：US14560565

申请日：2014-12-04

申请人： PRC-DeSoto International, Inc.

发明人： Raquel Keledjian ,  Renhe Lin ,  Chandra Rao ,  Bruce Virnelson

IPC分类号： C08L81/02 ,  C09J181/02 ,  C08G75/02 ,  C08G75/12

摘要： Disclosed are methods for making a cured sealant. The methods include depositing an uncured sealant composition on a substrate and exposing the uncured sealant composition to actinic radiation to provide a cured sealant. The uncured sealant composition includes a thiol-terminated polythioether, a polyene comprising a polyvinyl ether and/or a polyallyl compound, and a hydroxy-functional vinyl ether. Related sealant compositions are also disclosed.

公开(公告)号：US20150086726A1

公开(公告)日：2015-03-26

申请号：US14560565

申请日：2014-12-04

申请人： PRC-DeSoto International, Inc.

发明人： Raquel Keledjian ,  Renhe Lin ,  Chandra Rao ,  Bruce Virnelson

IPC分类号： C09J181/02 ,  C08G75/02

CPC分类号： C09J181/02 ,  C08G75/02 ,  C08G75/12 ,  C08L81/02

摘要： Disclosed are methods for making a cured sealant. The methods include depositing an uncured sealant composition on a substrate and exposing the uncured sealant composition to actinic radiation to provide a cured sealant. The uncured sealant composition includes a thiol-terminated polythioether, a polyene comprising a polyvinyl ether and/or a polyallyl compound, and a hydroxy-functional vinyl ether. Related sealant compositions are also disclosed.

摘要翻译： 公开了制造固化的密封剂的方法。 所述方法包括将未固化的密封剂组合物沉积在基材上并将未固化的密封剂组合物暴露于光化辐射以提供固化的密封剂。 未固化的密封剂组合物包括硫醇封端的聚硫醚，包含聚乙烯醚和/或聚烯丙基化合物的多烯和羟基官能的乙烯基醚。 还公开了相关的密封剂组合物。

公开(公告)号：US11015057B2

公开(公告)日：2021-05-25

申请号：US16373668

申请日：2019-04-03

申请人： PRC-DeSoto International, Inc.

发明人： Chandra Rao ,  Renhe Lin

IPC分类号： C08L81/02 ,  C08K5/19 ,  C08K5/55 ,  C08L71/02 ,  C09K3/10 ,  C08G75/04

摘要： Dual cure compositions include a combination of an organoborane complex and a radical oxidizing agent as co-catalysts. The compositions are curable under dark conditions and can be used to catalyze thiol-ene reactions. The compositions are useful as sealants.

公开(公告)号：US10233369B2

公开(公告)日：2019-03-19

申请号：US15967608

申请日：2018-05-01

申请人： PRC-DeSoto International, Inc.

发明人： Raquel Keledjian ,  Renhe Lin ,  Chandra Rao ,  Bruce Virnelson

IPC分类号： C08F283/00 ,  C08G75/02 ,  C08L81/02 ,  C09J181/02 ,  C08G75/12

摘要： Disclosed are methods for making a cured sealant. The methods include depositing an uncured sealant composition on a substrate and exposing the uncured sealant composition to actinic radiation to provide a cured sealant. The uncured sealant composition includes a thiol-terminated polythioether, a polyene comprising a polyvinyl ether and/or a polyallyl compound, and a hydroxy-functional vinyl ether. Related sealant compositions are also disclosed.

公开(公告)号：US20170114208A1

公开(公告)日：2017-04-27

申请号：US14922280

申请日：2015-10-26

申请人： PRC-DeSoto International, Inc.

发明人： Chandra Rao ,  Juexiao Cai ,  Renhe Lin

IPC分类号： C08K5/375 ,  C09J181/02 ,  C09J5/00 ,  C08K5/378

CPC分类号： C08K5/375 ,  C07C323/16 ,  C07D251/34 ,  C08G75/06 ,  C08K5/378 ,  C08K7/00 ,  C08L81/02 ,  C08L81/04 ,  C09J5/00 ,  C09J181/02 ,  C09J2481/00

摘要： Reactive antioxidants, antioxidant-containing prepolymers, compositions containing reactive antioxidants and antioxidant-containing prepolymers, methods of synthesizing reactive antioxidants and reactive antioxidant-containing prepolymers and the use of reactive antioxidants and antioxidant-containing prepolymers in aerospace sealant applications are disclosed. Reactive antioxidants and antioxidant-containing prepolymers can be added to a curable composition and react with a curing agent to become incorporated into the cured polymer network. Antioxidant-containing prepolymers have antioxidants incorporated into the backbone of the prepolymer. Cured sealant compositions comprising reactive antioxidants and antioxidant-containing prepolymers exhibit enhanced thermal resistance.

公开(公告)号：US09540540B2

公开(公告)日：2017-01-10

申请号：US14708314

申请日：2015-05-11

申请人： PRC-DeSoto International, Inc.

发明人： Chandra Rao ,  Juexiao Cai ,  Renhe Lin

IPC分类号： C09D181/02 ,  C08F228/04 ,  C07C317/18 ,  C08G75/20 ,  C08G75/23 ,  C08G75/00 ,  C08G75/02 ,  C08L81/00 ,  C08L81/02 ,  C08L81/04 ,  C07C317/04

CPC分类号： C09D181/02 ,  C07C317/04 ,  C07C317/18 ,  C08F228/04 ,  C08G75/00 ,  C08G75/02 ,  C08G75/20 ,  C08G75/23 ,  C08L81/00 ,  C08L81/02 ,  C08L81/04

摘要： Sulfone-containing polythioethers, compositions containing sulfone-containing polythioethers, methods of synthesizing sulfone-containing polythioethers and the use of sulfone-containing polythioethers in aerospace sealant applications are disclosed. The sulfone-containing polythioethers have sulfone groups incorporated into the backbone of the polythioether. Cured sealant compositions comprising the sulfone-containing polythioethers exhibit enhanced thermal resistance.

摘要翻译： 公开了含有砜的聚硫醚，含有砜的聚硫醚的组合物，含有砜的聚硫醚的合成方法和含有砜的聚硫醚在航天密封剂中的应用。 含砜的聚硫醚具有并入聚硫醚的主链中的砜基。 包含含砜聚硫醚的固化密封剂组合物表现出增强的耐热性。

公开(公告)号：US09382462B2

公开(公告)日：2016-07-05

申请号：US14709597

申请日：2015-05-12

申请人： PRC-DeSoto International, Inc.

发明人： Chandra Rao ,  Jun Deng ,  Renhe Lin

IPC分类号： C08G18/28 ,  C09J181/02 ,  C08G75/04

CPC分类号： C09J181/02 ,  C08G75/045 ,  C08G75/12

摘要： Metal ligand-containing prepolymers, compositions containing metal ligand-containing prepolymers, methods of synthesizing metal ligand-containing prepolymers and the use of metal ligand-containing prepolymers in aerospace sealant applications are disclosed. The metal ligand-containing prepolymers have metal ligands incorporated into the backbone of the prepolymer. Cured sealant compositions comprising the metal ligand-containing prepolymers exhibit enhanced properties suitable for aerospace sealant applications.