Polyurethane catalyst compositions for improving foam performance
AssigneeAir Products and Chemicals, Inc.
InventorsLisa Ann Mercando, Michael John Kimock, Michael Louie, Mark Leo Listemann
Life of this patent
Estimating the term…
Abstract
A polyurethane catalyst composition comprises N,N'-bis(3-dimethylaminopropyl) urea and 3-dimethylaminopropyl urea in a ratio that can be varied to systematically control flowability, airflow, and force-to-crush physical properties for flexible polyurethane foam to enhance processibility. Increasing the N,N'-bis(3-dimethylaminopropyl) urea to 3-dimethylaminopropyl urea ratio increases the airflow and decreases the force-to-crush values of the foam whereas decreasing the N,N'-bis(3-dimethylaminopropyl) urea to 3-dimethylaminopropyl urea ratio improves the flowability of the foam.
Claims16
In a method for preparing a flexible polyurethane foam by reacting an organic polyisocyanate and a polyol in the presence of a blowing agent, a cell stabilizer and a catalyst composition, the improvement for controlling the processing latitude of the foam composition which comprises using a catalyst composition consisting essentially of>0 to<100 mole % 3-dimethylaminopropyl urea and>0 to<100 mole % N,N'-bis(3-dimethyl-aminopropyl) urea.
In a polyurethane flexible foam composition having a 1-3 lb/ft.sup.3 (16-48 kg/m.sup.3) density and comprising the following components in parts by weight (pbw):
- ______________________________________ Polyol 20-100 Polymer Polyol 80-0 Silicone Surfactant 1-2.5 Blowing Agent 2-4.5 Crosslinker 0.5-2 Catalyst Composition 0.5-2 Isocyanate Index 70-115 ______________________________________
- the improvement which comprises the catalyst composition comprising>0 to<100 mole % 3-dimethylaminopropyl urea and>0 to<100 mole % N,N'-bis(3-dimethylamino-propyl) urea.
Dependencies are inferred from the claim text.