Microencapsulation of phosphate: application to flame retarded coated cotton

摘要

Polyurethane-phosphates combination is known to form a flame retardant (FR) intumesent system. The intumescent formulation could not be permanent because of the water solubility f the phosphate. This problem could be solved by the technique of microencapsulation. Di-ammonium hydrogen phosphate (DAHP) was miroencapsulated with a polyurethane (PU) shell. Polyurethane for textile coating was loaded with neat or microencapsulated DAHP. We studied the thermal degradation behaviour Of DAHP microcapsules, PU loaded formulations and cotton coated by these PU formulations.