Polyhalogenated polyols and foamed polyurethanes prepared from them
AssigneeThe Dow Chemical Company
InventorsArthur E. Gurgiolo, Llewellyn D. Booth
Life of this patent
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Abstract
Polyhalogenated polyols are prepared having the formula (Q)--N(R).sub.b --(CH.sub.2).sub.c N(Q)].sub.d --.sub.2).sub.c OH wherein Q is 3-polyhalophenoxy-2-hydroxy-propyl; R is --CH.sub.2).sub.c OH or --CH.sub.2).sub.c CH.sub.3 ; a is 1 or 2; b is 0 or 1; c is 1-4 and d is 0 or 1 with the proviso that when a is 2, b is 0 and halo is bromine or chlorine. These polyols such as N,N-bis[3-(2',4'-dibromophenoxy)-2-hydroxypropyl]ethanolamine are used to make fire retardant rigid polyurethane foams using isocyanates, blowing agents, and the like.
Claims12
A semi-rigid to rigid foamed polyurethane product having predominantly closed cells which comprises the reaction product of
- 1. a polyol having the formula
- (Q).sub.a --N(R).sub.b --[(CH.sub.2).sub.c N(Q)].sub.d (CH.sub.2).sub.c OH
- wherein Q is 3-polyhalophenoxy-2-hydroxypropyl;
- R is --(CH.sub.2).sub.c OH or --(CH.sub.2).sub.c CH.sub.3 ;
- a is 1 or 2;
- b is 0 or 1;
- c is 2-4 and d is 0 or 1 with the proviso that when a is 2, b is 0 and halo is bromine or chlorine,
- 2. an aryl polyisocyanate,
- 3. a polyurethane blowing agent, and
- 4. a surfactant,
- wherein said polyisocyanate is used in amounts corresponding to from 0.9 to 2.0 NCO groups for each active hydrogen atom in the mixture of reactive materials.
Dependencies are inferred from the claim text.