Strategies for Improving the ‘Back-end’ Reactivity of Bismuth Carboxylate Catalysts

Bismuth carboxylates are known to offer excellent ‘front-end’ reactivity as gelling catalysts in urethane applications. However, they are also associated with a lack of ‘back-end’ reactivity, which affects important manufacturing properties for polyurethanes such as demolding time, residual tackiness, and hardness buildup. To address these challenges, REAXIS® has investigated how excess complimentary carboxylic acid and heterobimetallic […]

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Technical Bulletin: Bismuth Catalysts

As regulation drives a shift toward formulations with low VOC content and alternative metals, the development of catalysts that are hydrolytically stable is of great interest in the coatings, adhesives, sealants, and elastomers (CASE) industries as waterborne formulations grow in popularity. Bismuth-based catalysts are lower toxicity alternatives that provide comparable reactivity but require a significant amount of excess carboxylic acid to provide product stability and workable viscosities. Reaxis […]

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