Abstract
Use of water instead of chlorofluorocarbons in foaming processes results in increased slabstock temperature and concomitant scorching which often occur more easily in the fire retardant foams. However, not all fire retardants aggravate scorch. Interaction of a number of fire retardants with aniline, which was chosen as a model compound simulating the –NH 2 groups always present in water-blown polyurethane foams, has been examined by several experimental techniques. The reported results highlight that this interaction leads to alkylation of the amine and to the formation of phosphoric acid or alkyl phosphoric acids or hydrogen chloride in the case of chloroalkyl phosphates. As this interaction occurs the scorch phenomenon occurs as well in the fire retardant foams, therefore the scorch could be possibly connected with this interaction. It is likely that N-alkyl anilines or HCl or phosphoric acids can promote scorch.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.