Prc De Soto International, Inc.

Courtaulds Aerospace, Inc.

Bruce Virnelson

Renhe Lin

Chandra B Rao

Raquel Keledjian

Juexiao Cai

JianCheng Liu

Jin Song

Richard Giangiordano

Nagarajan Srivatsan

Srikant Pathak

Chu Ran Zheng

Sean Manion

Jose Luzano

Pat Niega

Timothy Blackford

Emilia Serrano

Brian Bertino

Adam Stott

Kevin Cheng

Jiancheng Liu

Raquel A Keledjian

Renbe Lin

Chandra Bhushan Rao

Jose Lozano

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.

Actinic radiation-curable urethane/urea-containing aerospace coatings and sealants

Low density aerospace compositions and sealants are disclosed. The low density compositions and sealants are characterized by a high volume percent loading of low density microcapsules.

Low density aerospace compositions and sealants

Compositions that are curable by free radical redox reactions are disclosed. Free radical curing reactions between polythiols and polyalkyenyls are initiated by the reaction of metal complexes and organic peroxides. The compositions are useful as sealants.

Dual cure sealants

Adhesion-promoting compositions and the use of the adhesion-promoting compositions to provide adhesion-promoting interlayers to enhance adhesion between adjoining layers of sulfur-containing sealants are disclosed. In repair applications, the adhesion-promoting compositions can enhance the adhesion of an overlying radiation-curable sulfur-containing sealant to a damaged or aged sulfur-containing sealant.

Free radical polymerizable adhesion-promoting interlayer compositions and methods of use

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.

Methods for making cured sealants by actinic radiation and related compositions

Compositions comprising thiol-terminated polythioether prepolymers, polyepoxides and non-chromate corrosion inhibitors suitable for use in aerospace sealant applications are disclosed. Sealants prepared using the compositions adhere to a variety of aerospace substrates following exposure to aerospace fluids.

Non-chromate corrosion inhibiting polythioether sealants

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.

Moisture-curable fuel-resistant sealant systems

UV curable sealants, method s for making the sealants, and method for using the sealants are disclosed. The UV curable sealants may be used in seal caps useful to seal fasteners in aerospace fuel tanks. The UV curable sealants may also be used to smooth defects in surfaces such as aerospace surfaces.

Uses of UV-curable polythioether sealants for sealing fasteners and for smoothing surfaces

Thiol-terminated polythioether compositions and sealants prepared using the thiol-terminated polythioether compositions that exhibit enhanced retention of elongation following exposure to high temperature are disclosed. The enhanced retention of elongation is realized by incorporating certain phenolic antioxidants into the composition.

Polythioether sealants with enhanced thermal resistance

Disclosed are sulfur-containing polymers containing copolymerizable adhesion promoters and compositions including sealant compositions useful in aerospace applications comprising sulfur-containing polymers containing copolymerizable adhesion promoters. In particular, polythioethers and polysulfides incorporating copolymerizable adhesion promoters are disclosed.

Growing community of inventors

Valencia, CA, United States of America

Bruce Virnelson