Fire-retardant polyurethane
AssigneeGAF Corporation
InventorRobert Victor Russo
Life of this patent
Estimating the term…
Abstract
Polyurethanes incorporating 2,3-dibromobutenediol-1.4, as a reactive fire-retardant component and chain extender, in combination with organophosphorous compounds, to effect a decrease in the amount of brominated diol necessary, and thus in the bromine content of the resin, to provide fire-retardant polyurethane products manifesting significantly reduced smoke emission in the event of combustion and other enhanced physical properties.
Claims23
The process of producing a polyurethane that comprises reacting an halogenated polyether or polyester polyol, an organic polyisocyanate, 2,3-dibromo-2-butenediol-1,4, and a phosphorus-containing compound selected from the formulae:
- ##STR9## and mixtures thereof;
- wherein each of a and b has a value of 0 to 2 inclusive;
- c is an integer of from 1 to 3 and the sum of a, b, and c is 3;
- each of R and R.sup.1 is an alkyl, alkoxy, aryloxy, alkaryl, alkaryloxy, aralkyl, aryloxyalkoxy, or aralkoxy radical wherein each of said alkyl moieties is unsubstituted or hydroxy-substituted;
- and each of any aryl portion of said radical is an unsubstituted, or hydroxy- or chlorine-substituted aromatic hydrocarbon;
- R.sup.2 is an alkyl, hydroxyalkyl, or unsubstituted aromatic hydrocarbon radical;
- R.sup.3 is an alkyl or hydroxyalkyl radical;
- d has a value of from 0 to 2 inclusive;
- e is an integer of from 1 to 3 inclusive;
- and the sum of d and e is not in excess of 3;
- R.sup.4 is an alkyl, aryl, alkaryl, aralkyl or aryloxyalkyl group wherein any aryl portion of said group is an unsubstituted, or chlorine- or hydroxy-substituted aromatic hydrocarbon;
- R.sup.5 is an alkyl, alkylene, aryl or arylene radical;
- and each of said aryl and arylene radicals is an unsubstituted or chlorine- or hydroxy-substituted aromatic hydrocarbon moiety;
- and R.sup.6 is an alkyl, aryl, alkaryl, aralkyl or aryloxyalkyl group wherein any aryl moiety present is an unsubstituted, hydroxy-substituted or chlorine substituted aromatic hydrocarbon moiety;
- and wherein said 2,3-dibromo-2-butenediol-1,4 and said phosphorus-containing compound are present in an amount sufficient to provide a final polymer containing weight percents of bromine (Br) and phosphorus (P) defined by the equation:
- P + Br/10 .congruent. 0.1 to 1.0 and wherein P has a value of not less than 0.05 weight percent and Br has a value not less than 0.5 weight percent.
A polyurethane produced by reaction of an unhalogenated polyether polyol, an organic polyisocyanate, 2,3-dibromo-2-butenediol-1,4, and a phosphourus-containing compound selected from the formulea:
- ##STR15## and mixtures thereof;
- wherein each of a and b has a value of 0 to 2 inclusive;
- c is an integer of from 1 to 3 and the sum of a, b, and c is 3;
- each of R and R.sup.1 is an alkyl, alkoxy, aryloxy, alkaryl, alkaryloxy, aralkyl, arloxyalkoxy, or aralkoxy radical wherein each of said alkyl moieties is unsubstituted or hydroxy-substituted;
- and each of any aryl portion of said radical is an unsubstituted, or hydroxy- or chlorine-substituted aromatic hydrocarbon;
- R.sup.2 is an alkyl, hydroxyalkyl, or unsubstituted aromatic hydrocarbon radical;
- R.sup.3 is an alkyl or hydroxy-alkyl radical;
- d has a value of from 0 to 2 inclusive;
- e is an integer of from 1 to 3 inclusive;
- and the sum of d and e is not in excess of 3;
- R.sup.4 is an alkyl, aryl, alkaryl, aralkyl or aryloxyalkyl group, wherein any aryl portion of said group is an unsubstituted, or chlorine- or hydroxy-substituted aromatic hydrocarbon;
- R.sup.5 is an alkyl, alkylene, aryl or arylene radical;
- and each of said aryl and arylene radicals is an unsubstituted or chlorine- or hydroxy-substituted aromatic hydrocarbon moiety;
- and R.sup.6 is an alkyl, aryl, alkaryl, aralkyl or aryloxyalkyl group wherein any aryl moiety present is an unsubstituted, hydroxy-substituted or chlorine-substituted aromatic hydrocarbon moiety;
- and wherein said 2,3-dibromo-2-butenediol-1,4 and said phosphorus-containing compound are present in an amount sufficient to provide by weight percent of the final product a sum total of bromine (Br) and phosphorus (P), defined by the equation:
- P + Br/10 .congruent. 0.1 to 1.0 and wherein phosphorus (P) has a value of not less than 0.05 weight percent and bromine (Br) has a value of not less than 0.5 weight percent.
Dependencies are inferred from the claim text.