公开(公告)号：US20130296490A1

公开(公告)日：2013-11-07

申请号：US13934286

申请日：2013-07-03

Applicant: PRC-DeSoto International, Inc.

Inventor： Stephen J. Hobbs ,  Juexiao Cai ,  Marfi Ito ,  Renhe Lin

IPC: C09J175/02

CPC classification number: C09D175/04 ,  C08G18/10 ,  C08G18/52 ,  C08G18/56 ,  C08G18/755 ,  C08G18/758 ,  C08G18/798 ,  C08G2190/00 ,  C09J175/02 ,  C08G18/281 ,  C08G18/3868

Abstract: Disclosed are polyurea compositions comprising the reaction products of a polyformal-isocyanate prepolymer and a curing agent comprising an amine. The compositions are useful as sealants in aerospace applications.

Abstract translation: 公开了包含聚甲醛 - 异氰酸酯预聚物和包含胺的固化剂的反应产物的聚脲组合物。 该组合物可用作航空航天应用中的密封剂。

公开(公告)号：US20250136838A1

公开(公告)日：2025-05-01

申请号：US18834678

申请日：2023-01-27

Applicant: PRC-Desoto International, Inc.

Inventor： Razmik Boghossian ,  James Smith ,  Laxman Gurung ,  Renhe Lin

IPC: C09D175/12 ,  C08G18/12 ,  C08G18/32

Abstract: Isocyanate-functional polyurethane prepolymers are prepared by reacting a polymeric diol, a non-linear short chain diol, a multifunctional polyol, and a diisocyanate. Coating compositions comprising the isocyanate-functional polyurethane prepolymers and a polyamine curing agent can be used to prepare topcoats that meet the demanding performance requirements of aerospace and other applications.

公开(公告)号：US11236201B2

公开(公告)日：2022-02-01

申请号：US16347410

申请日：2017-11-03

Applicant: PRC-DeSoto International, Inc.

Inventor： Weibin Cui ,  Renhe Lin

IPC: C08G75/045 ,  C09D181/02 ,  C09K3/10

Abstract: Sulfur-containing poly(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing sulfur-containing poly(alkenyl) ether-containing polythioether prepolymers and/or sulfur-containing poly(alkenyl) ether curing agents exhibit improved physical properties suitable for use in aerospace sealant applications.

公开(公告)号：US20200317917A1

公开(公告)日：2020-10-08

申请号：US16373668

申请日：2019-04-03

Applicant: PRC-DeSoto International, Inc.

Inventor： Chandra Rao ,  Renhe Lin

IPC: C08L81/02 ,  C08K5/55 ,  C08L71/02 ,  C08K5/19 ,  C09K3/10

Abstract: 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：US10597360B2

公开(公告)日：2020-03-24

申请号：US15886242

申请日：2018-02-01

Applicant: PRC-DeSoto International, Inc.

Inventor： Weibin Cui ,  Renhe Lin

IPC: C08G75/02 ,  C08G75/12 ,  C07C323/12 ,  C08G75/045 ,  C09K3/10

Abstract: Hydroxyl-containing bis(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing hydroxyl-containing bis(alkenyl) ether-containing polythioether prepolymers and/or hydroxyl-containing bis(alkenyl) ether curing agents exhibit improved physical properties such as rapid curing and compatibility with fillers suitable for use in aerospace sealant applications.

公开(公告)号：US09951252B2

公开(公告)日：2018-04-24

申请号：US14822123

申请日：2015-08-10

Applicant: PRC-DeSoto International, Inc.

Inventor： Bruce Virnelson ,  Renhe Lin

IPC: C09D181/02 ,  C09D181/04 ,  B05D7/00 ,  B64G1/00 ,  F16B47/00

CPC classification number: C09D181/04 ,  B05D7/54 ,  B64G1/00 ,  C09D181/02 ,  F16B47/003

Abstract: Sealant systems that are pre-applied to a part to be sealed include a layer of an uncured moisture-curable sealant and a frangible barrier coating applied over the uncured moisture-curable sealant. During assembly, the barrier coating breaks to expose the moisture-curable sealant to moisture to initiate the curing reaction. The moisture-curable sealant systems are suitable for aerospace applications and include sulfur-containing prepolymers. Various curing chemistries can be used.

公开(公告)号：US09920006B2

公开(公告)日：2018-03-20

申请号：US15194617

申请日：2016-06-28

Applicant: PRC-DeSoto International, Inc.

Inventor： Weibin Cui ,  Renhe Lin

IPC: C08G75/02 ,  C07C323/12 ,  C08G75/045 ,  C09K3/10 ,  C08G75/12 ,  C08G75/04 ,  C07C23/00 ,  G02B1/04

CPC classification number: C07C323/12 ,  C08G75/02 ,  C08G75/045 ,  C08G75/12 ,  C08G2190/00 ,  C09K3/1012 ,  C09K2003/1059

Abstract: Hydroxyl-containing bis(alkenyl) ethers can be incorporated into the backbone of polythioether prepolymers and can be used as curing agents in thiol-terminated polythioether prepolymer compositions. Cured sealants prepared using compositions containing hydroxyl-containing bis(alkenyl) ether-containing polythioether prepolymers and/or hydroxyl-containing bis(alkenyl) ether curing agents exhibit improved physical properties such as rapid curing and compatibility with fillers suitable for use in aerospace sealant applications.

公开(公告)号：US09777139B2

公开(公告)日：2017-10-03

申请号：US14922280

申请日：2015-10-26

Applicant: PRC-DeSoto International, Inc.

Inventor： Chandra Rao ,  Juexiao Cai ,  Renhe Lin

IPC: C08G63/02 ,  C08K5/375 ,  C08K5/378 ,  C09J181/02 ,  C09J5/00

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

Abstract: 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：US09650552B2

公开(公告)日：2017-05-16

申请号：US13833964

申请日：2013-03-15

Applicant: PRC-DeSoto International, Inc.

Inventor： Juexiao Cai ,  Renhe Lin

IPC: C09K3/10 ,  C08G59/04 ,  C08G59/50 ,  C08G75/00 ,  C08G75/02 ,  C08L63/00 ,  C08L81/00 ,  C08G59/18

CPC classification number: C09K3/1012 ,  C08G59/188 ,  C08G59/50 ,  C08G75/00 ,  C08G75/02 ,  C08L63/00 ,  C08L81/00 ,  Y10T428/24331 ,  C08L81/02

Abstract: Curable compositions containing thiol-terminated polythioethers and encapsulated polyepoxy curing agents are disclosed. The compositions exhibit extended pot life.

公开(公告)号：US20160304759A9

公开(公告)日：2016-10-20

申请号：US14560565

申请日：2014-12-04

Applicant: PRC-DeSoto International, Inc.

Inventor： Raquel Keledjian ,  Renhe Lin ,  Chandra Rao ,  Bruce Virnelson

IPC: C09J181/02 ,  C08G75/02

CPC classification number: C09J181/02 ,  C08G75/02 ,  C08G75/12 ,  C08L81/02

Abstract: 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.