Halogen-free flame retardant polyamide composition with improved electrical and flammability properties
AssigneeSabic Innovative Plastics IP B.V.
InventorsCarlo Perego, Franciscus Petrus Maria Mercx, Robert Puyenbroek, Ramya Kumaraswamy, Hosahalli Ramachandra Manjunath, Sanjay Charati
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Abstract
Flame retardant polyamide compositions are provided containing a polyamide; a flame retardant system including a metal phosphinate or diphosphinate salt and a nitrogen compound; an aromatic polymer, and optionallly untreated nanoclay having an aspect ratio of about 100 to about 1000.
Claims27
A flame-retardant polyamide composition, comprising a blend of:
- a polyamide;
- about 5 to about 25 weight percent of a flame retardant system comprising
- i) a metal phosphinate or diphosphinate salt;
- and
- ii) at least one nitrogen compound selected from the group consisting of condensation products of melamine and/or reaction products of condensation products of melamine with phosphoric acid, and/or mixtures thereof, including for example melam, melem, melon, melamine cyanurate, melamine phosphate compounds, dimelamine phosphate and/or melamine pyrophosphate, benzoguanamine compounds, terepthalic ester compounds of tris(hydroxyethyl)isocyanurate, allantoin compounds, glycoluril compounds, ammeline, ammelide, and combinations thereof;
- and
- about 2 to about 36 weight percent of at least one aromatic polymer selected from the group consisting of poly(arylene ether), polyetherimide, polyetherimide/polyimide copolymers, poly(arylene sulfide), polysulfone, polyethersulfone, polyetheretherketone, an styrenic impact modifier, and combinations thereof;
- wherein all the amounts are based upon the total weight of the composition;
- wherein the composition exhibits a Glow Wire Ignition Temperature as measured according to IEC-60695-2-13 of 750° C. or greater at about 1.6 millimeter thickness.
The composition of 1, wherein the metal phosphinate salt is of the formula (I) and the metal diphosphinate salt is of the formula (II)
- wherein R1 and R2 are each independently hydrogen, a linear or branched C1-C6 alkyl radical, or aryl radical;
- R3 is a linear or branched C1-C10 alkylene, arylene, alkylarylene, or arylalkylene radical;
- M is calcium, aluminum, magnesium, strontium, barium, or zinc;
- m is 1, 2 or 3;
- n is 1 or 3;
- and x is 1 or 2.
A flame-retardant polyamide composition, comprising a blend of:
- a polyamide;
- from 5 to 25 weight percent of a flame retardant system comprising;
- i) a metal phosphinate or diphosphinate salt;
- and ii) at least one nitrogen compound selected from the group consisting of condensation products of melamine and/or reaction products of condensation products of melamine with phosphoric acid, and/or mixtures thereof, including for example melam, melem, melon, melamine cyanurate, melamine phosphate compounds, dimelamine phosphate and/or melamine pyrophosphate, benzoguanamine compounds, terepthalic ester compounds of tris(hydroxyethyl)isocyanurate, allantoin compounds, glycoluril compounds, ammeline, ammelide, and combinations thereof;
- and
- up to 20 weight percent of an untreated, swellable, ion-exchangeable, layered material having nanometer-thick platelets ranging from 0.9 nm to 1000 nm in diameter and an aspect ratio of 100 to 1000;
- wherein the composition exhibits a Glow Wire Ignition Temperature as measured according to IEC-60695-2-13 of 750° C. or greater at 1.6 millimeter thickness.
Dependencies are inferred from the claim text.