Emerald Specialty Polymers, LLC

Huntsman Advanced Materials Americas LLC

Advanced Polymer Coatings, Inc.

Jeremy Pasatta

Yu Chen

Roert J Bertsch

Joey Yang

Cheng Xiong

Donald J Keehan

Urea-terminated polybutadiene polymers and polybutadiene acrylonitrile copolymers useful as both accelerators and tougheners are disclosed for use in epoxy formulations cured with dicyandiamide. The inventive urea-terminated polymers achieve comparable toughness in cured epoxy formulations when compared to that achieved with traditional polymeric or rubber tougheners with little to no change in glass transition temperature. Viscosity improvement and stability over time are also an advantage. A method of preparation emphasizing aspects of reaction stoichiometry is also disclosed.

Urea terminated butadiene polymers and butadiene acrylonitrile copolymers

Novel method for production of epoxy terminated butadiene and butadiene acrylonitrile copolymer tougheners synthesized through the use of hydroxyl terminated polybutadiene and hydroxyl terminated butadiene acrylonitrile copolymers as starting materials. The epoxy terminated butadiene and butadiene acrylonitrile copolymers synthesized by the novel method have unexpectedly lower viscosity, contain no free epoxy and provide good improvements in T-peel resistance over traditional tougheners produced using traditional methods. Adhesives, composites and coatings utilizing the tougheners of the inventive method are within the scope of the invention.

Epoxy terminated butadiene and butadiene acrylonitrile copolymers

A blend of epoxy resins includes a) an epoxy resin composition derived from the reaction of a liquid epoxy resin, a carboxyl terminated butadiene (CTB), and a carboxyl terminated polybutadiene-acrylonitrile (CTBN) and/or a random and terminal carboxyl functional polybutadiene-acrylonitrile (CTBNX), and b) unreacted epoxy resin. The carboxyl terminated butadiene is miscible with the unreacted epoxy resin and does not separate therefrom even upon aging. Upon cure as with a latent cure agent, a toughened epoxy resin is produced having unexpected good low temperature properties such as peel strength.

Epoxy resins adducted with reactive liquid rubber having improved low temperature performance properties

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Olmsted Falls, OH, United States of America

Jeremy Pasatta