Heat/light-stabilized polyamide compositions
AssigneeRhodia Operations
InventorNicolangelo Peduto
Life of this patent
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Abstract
Heat and light-stabilized polyamide compositions containing a stabilization system that includes copper oxide and KBr, and have an excellent preservation of color and of the mechanical properties thereof after exposure to heat or to light; these compositions are especially useful for producing shaped articles in the automotive field.
Claims17
An admixture comprising at least one polyamide having an apparent viscosity in the molten state ranging from 30 to 1200 Pa.s, measured according to ISO 11443 and a heat- and light-stabilizing amount of Cu2O and KBr, wherein said at least one polyamide comprises at least one PA-6 polyamide or PA-6,6 polyamide, wherein the concentration of Cu2O is from 0.001% to 2% by weight relative to the total weight of said at least one polyamide, wherein the concentration of KBr is from 0.1% to 1.2% by weight relative to the total weight of said at least one polyamide, and wherein the admixture comprises a branched polyamide or a star polyamide.
An admixture comprising at least one polyamide and a heat- and light-stabilizing amount of at least one copper oxide and KBr, wherein the at least one polyamide comprises linkages of isophthalic acid or benzoic acid and said isophthalic acid or benzoic acid is present in an amount from 0.2% wt % to 1 wt % of the composition.
An admixture comprising at least one polyamide and a heat- and light-stabilizing amount of at least one copper oxide and KBr, wherein the at least one polyamide comprises linkages of isophthalic acid or benzoic acid, said at least one polyamide having an apparent viscosity in a molten state ranging from 30 to 1200 Pa·s or 30 to 700 Pa·s, measured according to ISO 11443, and said isophthalic acid or benzoic acid is present in an amount from 0.2% wt % to 1 wt % of the composition.
Dependencies are inferred from the claim text.