This paper reports the way different combinations of organic acids and tertiary amines work as catalysts in various polyurethane systems. The term "delayed action" is defined with examples of model reactions and commercially available polyurethane formulations. The effects on the reaction parameters in several foam systems and one elastomeric formulation will be presented. From amongst the broad range of amine catalysts we chose the following for our study: * 33.3% solution of triethylene diamine in dipropylene glycol THANCAT TD 33 A ## * methylazanorbornane as pure substance THANCAT AN 10 or a 33.3% solution in dipropylene glycol ##
are required. In order to investigate the silicone surfactant structure/foam performance relationship, a design study was initiated in a variety of formulations. In addition to the standard performance evaluations, special techniques were developed and effected to understand the solubility, emulsification and compatibility characteristics of pentane during the production and aging of the foam. This paper will discuss the influence of different silicone surfactants on the emulsification and stabilization of pentane in polyol premixes, reaction mixtures and during foam formation. The influence of the silicone surfactants on the physical properties of the final foam will also be discussed. '1'his paper reports the way dmerent combinations or organic acids and tertiary amines work as catalysts in various polyurethane systems. The term &dquo;delayed action&dquo; is defined with examples of model reactions and commercially available polyurethane formulations. The effects on the reaction parameters in several foam systems and one elastomeric formulation will be presented. From amongst the broad range of amine catalysts we chose the following for our study:. 33.3% solution of triethylene diamine in dipropylene glycol THANCAT@ TD 33 A . methylazanorbornane as pure substance THANCAT@ AN 10 or a 33.3% solution in dipropylene glycol
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