A polyisocyanurate foam insulation product includes polyisocyanurate foam produced from reacting an isocyanate and a polyol blend having a functionality of at least 2.2. The isocyanate and the polyol blend are reacted so that the polyisocyanurate foam has an isocyanate index equivalent with or greater than 300. The polyisocyanurate foam includes a fire retardant and includes between 0.02 and 0.45 weight percent of a zinc salt compound. The foam insulation board exhibits a flame spread of no greater than 25 and a smoke index of no greater than 50 when exposed to flame conditions in accordance with an ASTM E-84 test.

A polyisocyanurate foam insulation product includes polyisocyanurate foam produced from reacting an isocyanate and a polyol blend having a functionality of at least 2.2. The isocyanate and the polyol blend are reacted so that the polyisocyanurate foam has an isocyanate index equivalent with or greater than 300. The polyisocyanurate foam includes a fire retardant and includes between 0.02 and 0.45 weight percent of a zinc salt compound. The foam insulation board exhibits a flame spread of no greater than 25 and a smoke index of no greater than 50 when exposed to flame conditions in accordance with an ASTM E-84 test.

A material of formula (I)

M.sup.1.sub.aM.sup.2.sub.bW.sub.cO.sub.d(P(O).sub.nR.sub.m).sub.e(I)

wherein each of M.sup.1 and M.sup.2 is independently ammonium or a metal cation; a is 0.01 to 0.5; b is 0 to 0.5; c is 1; d is 2.5 to 3; e is 0.01 to 0.75; n is 1, 2 or 3; m is 1, 2 or 3; and R is an optionally substituted hydrocarbyl group.

A material of formula (I)

M.sup.1.sub.aM.sup.2.sub.bW.sub.cO.sub.d(P(O).sub.nR.sub.m).sub.e(I)

wherein each of M.sup.1 and M.sup.2 is independently ammonium or a metal cation; a is 0.01 to 0.5; b is 0 to 0.5; c is 1; d is 2.5 to 3; e is 0.01 to 0.75; n is 1, 2 or 3; m is 1, 2 or 3; and R is an optionally substituted hydrocarbyl group.

A bio-renewable flame-retardant compound, a process for forming a bio-renewable flame-retardant compound, and an article of manufacture comprising a bio-renewable flame-retardant compound are disclosed. The bio-renewable flame-retardant compound includes a cyclic structure formed in a reaction with a bio-renewable diene. The process for forming a bio-renewable flame-retardant compound includes the selection and reaction of a bio-renewable diene, a dienophile, and optionally a phosphorus compound to form a cyclic compound, reacting the cyclic compound with a phosphorus compound to form a cyclic flame-retardant compound, and forming a bio-renewable flame-retardant polymer that includes the bio-renewable flame-retardant compound. The article of manufacture includes a material containing the bio-renewable flame-retardant compound.

The invention relates to a composition comprising an organic material susceptible to oxidative, thermal or light-induced degradation and a compound of formula (I-P), (I-O) or (I-M). Further embodiments are a compound of formula (I-P), (I-O) or (I-M), a process for protection of the organic material by the compound, the use of the compound for stabilizing the organic material, an additive composition comprising the compound and a process for manufacturing the compound. The organic material is for example a polymer. ##STR00001##

The invention relates to a composition comprising an organic material susceptible to oxidative, thermal or light-induced degradation and a compound of formula (I-P), (I-O) or (I-M). Further embodiments are a compound of formula (I-P), (I-O) or (I-M), a process for protection of the organic material by the compound, the use of the compound for stabilizing the organic material, an additive composition comprising the compound and a process for manufacturing the compound. The organic material is for example a polymer. ##STR00001##

A polyisocyanurate foam insulation product includes polyisocyanurate foam produced from reacting an isocyanate and a polyol blend having a functionality of at least 2.2. The isocyanate and the polyol blend are reacted so that the polyisocyanurate foam has an isocyanate index equivalent with or greater than 300. The polyisocyanurate foam includes a fire retardant and includes between 0.02 and 0.45 weight percent of a zinc salt compound. The foam insulation board exhibits a flame spread of no greater than 25 and a smoke index of no greater than 50 when exposed to flame conditions in accordance with an ASTM E-84 test.

A polyisocyanurate foam insulation product includes polyisocyanurate foam produced from reacting an isocyanate and a polyol blend having a functionality of at least 2.2. The isocyanate and the polyol blend are reacted so that the polyisocyanurate foam has an isocyanate index equivalent with or greater than 300. The polyisocyanurate foam includes a fire retardant and includes between 0.02 and 0.45 weight percent of a zinc salt compound. The foam insulation board exhibits a flame spread of no greater than 25 and a smoke index of no greater than 50 when exposed to flame conditions in accordance with an ASTM E-84 test.

A polyisocyanurate foam insulation product includes polyisocyanurate foam produced from reacting an isocyanate and a polyol blend having a functionality of at least 2.2. The isocyanate and the polyol blend are reacted so that the polyisocyanurate foam has an isocyanate index equivalent with or greater than 300. The polyisocyanurate foam includes a fire retardant and includes between 0.02 and 0.45 weight percent of a zinc salt compound. The foam insulation board exhibits a flame spread of no greater than 25 and a smoke index of no greater than 50 when exposed to flame conditions in accordance with an ASTM E-84 test.