Flame-resistant polyurethanes
AssigneeClariant GmbH
InventorsMartin Sicken, Horst Staendeke
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Abstract
The flame-resistant polyurethanes of the invention comprise, as flameproofing agents, mixtures of oligomeric phosphoric acid esters which carry hydroxyalkoxy groups, of the formula I ##STR1## in which q denotes an average chain length of 0.5 to 10, R.sub.1 is a hydroxyl-containing radical of the formula II a, R.sub.2 is a radical of the formula III ##STR2## R.sub.3 is a radical of the formula II b, R.sub.4 is R.sub.1 or R.sub.3 ; R.sub.5, R.sub.6 and R.sub.7 are an H atom or an alkyl radical having 1 to 6 carbon atoms, m is 0 to 4 and n is 1 to 4.
Claims4
A flame-resistant polyurethane containing as the flameproofing agent a mixture of oligomeric phosphoric acid esters which carry hydroxyalkoxy groups, of the formula I ##STR13## in which q denotes an average chain length of 0.5 to 10, R.sub.1 is a hydroxyl-containing radical of the formula II a, R.sub.2 is a radical of the formula III ##STR14## R.sub.3 is a radical of the formula II b, R.sub.4 is R.sub.1 or R.sub.3 ;
- R.sub.5, R.sub.6 and R.sub.7 are an H atom or an alkyl radical having 1 to 6 carbon atoms, m is 0 to 4 and n is 1 to 4.
Dependencies are inferred from the claim text.