ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Influence of phosphorus content and of increase of cyclic structures content in crosslinked cellular urethane copolymers upon their physical properties

L. Zabski, W. Walczyk, and Z. Jedlinski

Institute of Polymer Chemistry, Polish Academy of Sciences, 41-800 Zabrze, Poland

Abstract:  The influence of polyhydroxy compounds containing at least one P—С bond as well as that of polyhydroxy compounds containing cyclic structures upon the flammability, thermal resistance, and thermomechanical properties of cellular copolyurethanes has been investigated. The minimum of flammability was reached at the phosphorus content 1.85% in urethane copolymer containing no chlorine and at 0.7—0.85% P in copolymers obtained from organo-phosphorus compounds containing chlorine and phosphorus in a molar ratio from 2 to 6. In TGA experiments, from cellular copolyurethanes containing phosphorus and chlorine a much larger amount of residue remained at 400°C, than from urethanes containing phosphorus alone. The thermomechanical properties of cellular copolymers did not deteriorate up to the 30% content of any organo-phosphorus compound used in experiments in mixtures with polyetherols. An increase of crosslinking density of phosphorus containing urethane copolymers as well as additional inserting from 2 to 6% of aromatic or saccharose rings caused the decrease of flammability of polyurethanes.

Full paper in Portable Document Format: 303a311.pdf

Chemical Papers 30 (3) 311–317 (1976)