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US 5,626,938 AGranted
Flame-retardant polyamide fiber
AssigneeBASF SE
InventorGary W. Shore
Life of this patent
Estimating the term…
Abstract
A method for producing halogen-free, antimony-free and phosphorous-free polyamide fibers is described by incorporating an additive into the polyamide which comprises a vulcanizable mixture of silicones and a catalyst in a thermoplastic matrix. The fibers have improved flame retardancy and are used for the manufacture of carpets.
Claims9
A melt-spun polyamide fiber formed of a polyamide mixture comprising:
- (i) at least about 80% by weight of a polyamide, wherein at least 90% of the polyamide is at least one nylon selected from the group consisting of nylon 6, nylon 6/6, copolymers thereof, and combinations thereof;
- and
- (ii) an additive containing (1) a thermoplastic matrix polymer, (2) silicones in an amount between about 5% to about 20% based on the total weight of the additive, and (3) a platinum complex catalyst;
- wherein
- said additive is present in said polyamide mixture in an amount between about 0.05% to about 20% by weight of the polyamide mixture so that said silicones are present in the polyamide mixture in an amount less than about 1.0% by weight sufficient to render said polyamide mixture more flame retardant than said polyamide mixture is without the additive, and wherein
- said polyamide fiber has a denier per filament of between about 6 to about 35.
3 more elements
A melt-spun polyamide fiber formed of a polyamide mixture comprising:
- (i) at least about 80% by weight of a polyamide, wherein at least 90% of the polyamide is at least one nylon selected from the group consisting of nylon 6, nylon 6/6, copolymers thereof, and combinations thereof;
- and
- (ii) an additive containing (1) a thermoplastic matrix polymer, (2) silicones in an amount between about 5% to about 20% based on the total weight of the additive, and (3) a platinum complex catalyst;
- wherein
- said additive is present in said polyamide mixture in an amount between about 0.05% to about 20% by weight of the polyamide mixture so that said silicones are present in the polyamide mixture in an amount less than about 0.5% by weight sufficient to render said polyamide mixture more flame retardant than said polyamide mixture is without the additive, and wherein
- said polyamide fiber has a denier per filament of between about 6 to about 35.
3 more elements
Dependencies are inferred from the claim text.