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Studies on polyurethanes and polyurethane–ureas derived from divalent metal salts of mono(hydroxybutyl) hexolate
Author(s) -
Arun Prasath R,
Vijayanand P S,
Nanjundan S
Publication year - 2000
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/1097-0126(200011)49:11<1464::aid-pi532>3.0.co;2-e
Subject(s) - hexamethylene diisocyanate , polymer chemistry , polyurethane , limiting oxygen index , thermogravimetry , solvent , chemistry , solubility , polymerization , polymer , thermal stability , nuclear chemistry , metal , materials science , organic chemistry , inorganic chemistry , pyrolysis , char
Divalent metal salts of mono(hydroxybutyl)hexolate [M(HBH) 2 ), M=Ca 2+ , Mn 2+ or Pb 2+ ] were synthesized by the reaction of 1,4‐butanediol, 5,6,7,8,10,10‐hexachloro‐3a,4,4a,5,8,8a,9,9a‐octahydro‐5,8‐methanonaphtho‐[2,3‐C]‐furan‐1,3‐dione and divalent metal acetates. Hexamethylene bis [N′‐(1‐hydroxy‐2‐methyl‐prop‐2‐yl)urea] (HBHMPU) and tolylene 2,4‐bis[ N ′‐(1‐hydroxy‐2‐methyl‐prop‐2‐yl)urea] (TBHMPU) were synthesized by reacting 2‐amino‐2‐methyl‐propan‐1‐ol with hexamethylene diisocyanate (HMDI) and tolylene 2,4‐diisocyanate (TDI), respectively, in toluene solvent. Flame‐retardant metal‐containing polyurethanes were synthesized by the solution polymerization of HMDI with M(HBH) 2 and the polyurethane–ureas by reacting HMDI with 1:1 mixture of M(HBH) 2 and HBHMPU or TBHMPU, respectively, in DMSO as solvent. The polymers have been characterized by elemental analysis, solubility, viscosity and IR and 1 H NMR spectroscopy. The thermal stability of the polymers has been studied by thermogravimetry. The flame‐retardant property of the polymers has been investigated by measuring limiting oxygen index values. © 2000 Society of Chemical Industry