Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5204369 | Polymer Degradation and Stability | 2006 | 5 Pages |
Abstract
We have found that a reheating process for the products in the chemical recycling of rigid polyurethane foam by an extruder with diethanolamine as a decomposing agent is effective for improving the product stability. The product with stable viscosity was obtained by the reheating process at 175-200 °C for 2 h, regardless of the extruding condition. An amine adduct, which is an intermediate, was found to be the cause of instability of the discharged product from the extruder. At the initial stage of reheating, the intermediate decomposed, releasing toluenediamine, which promoted further decomposition of the discharged products. We have succeeded in controlling the quality of the recycled products.
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Taro Fukaya, Hiroko Watando, Shinetsu Fujieda, Shioko Saya, Cao Minh Thai, Masaaki Yamamoto,