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US 4,360,616 AGranted
Flame-retardant polyamide compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorRolando U. Pagilagan
Life of this patent
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Abstract
A flame-retardant polyamide composition is described which has good arc tracking resistance. The composition is comprised of a polyamide, a selected organic flame-retardant, melamine or derivative, zinc borate or oxide and glass fiber.
Claims9
A reinforced, flame-retardant, arc track resistant composition consisting of
- (a) 40-65 weight percent of composition of a polyamide of film-forming molecular weight,
- (b) 16-35 weight percent of composition of melamine, melam, melamine cyanurate or a melamine derivative represented by the formula ##STR7## where R and R.sup.1 may be the same or different and represent hydrogen, lower alkyl (alkyl of 1-6 carbons), phenyl, tolyl or halo-phenyl, provided that not all the R and R.sup.1 groups can be hydrogen,
- (c) 1-7 weight percent of composition selected from the class consisting of a chlorinated compound obtained from condensation of two moles of perchlorocyclopentadiene and one mole of 1,5-cyclooctadiene, or a brominated polystyrene.
- (d) 1-4.9 weight percent of composition of zinc borate or zinc oxide
- (e) 5-30 weight percent of composition of glass fibers,
- the percent amounts of components (a) through (e) totaling 100% with respect to one another.
3 more elements
Dependencies are inferred from the claim text.