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US 4,067,911 AGranted
Halogenated polyether-polyols and polyurethane foams manufactured from the latter
AssigneeSolvay & Cie
InventorsRene Walraevens, Andre Collin
Life of this patent
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Abstract
Halogenated polyether-polyols lacking terminal primary chlorohydrin and hydroxyl groups are reacted with organic isocyanates to produce semi-rigid or rigid polyurethane foam having excellent physical, mechanical and processing characteristics and good fire-resistance. The polyether-polyols are used individually, as admixtures with each other and/or as admixtures with non-halogenated polyether-polyols.
Claims10
A polyether-polyol of the general formula:
- ##STR12## in which z represents a number from 2 to 6;
- x and y represent numbers from 0 to 7 such that the average value x + y per chain is from 0 to 7;
- z(x + y), wherein x + y represents the average value of x + y throughout the entire molecule, is from 1 to 42;
- Z represents a C.sub.2 to C.sub.6 aliphatic radical of valency z;
- and R represents a C.sub.1 to C.sub.5 monovalent aliphatic radical.
2 more elements
Dependencies are inferred from the claim text.