Back to results
US 10,240,028 B2Granted
Halogen-free flame retardant polyamides composition
AssigneeItalmatch Chemicals S.P.A.
InventorUgo Zucchelli
Life of this patent
Estimating the term…
Abstract
The present invention relates to halogen-free flame retardant compositions essentially comprising polyamide polymers (preferred is polyamide 6), at least a hypophosporous acid metallic salt (preferred is aluminum hypophosphite), at least a nitrogen based flame retardant agent (preferably selected among melamine condensation products such as melam, melem, melon or their mixtures, and melamine cyanurate), at least an organic polyhydric compound and optionally further conventional components. Such compositions are highly flame retardant.
Claims13
A halogen free flame retardant polyamide thermoplastic composition consisting of:
- a) at least a thermoplastic polyamide polymer,
- b) at least a hypophosphorus acid metal salt, where phosphorus valence state is equal to +1, as a first flame retardant (FR) component,
- c) at least a nitrogen based flame retardant agent, as a second flame retardant (FR) component, said second FR component being melam or melem or a mixture thereof,
- d) at least an organic polyhydric additive, as a third flame retardant (FR) component, selected from the group consisting of pentaerythritol, dipentaerythritol, polypentaerythritol, and their mixtures,
- e) conventional additives selected from the group consisting of:
- processing aids, process stabilizers, UV stabilizers, antidripping agents, pigments, dispersing agents, mould release additives, nucleating agents, partially crosslinked elastic polymers used as impact modifiers, and their mixtures;
- f) a hindered phenol heat stabilizer;
- and
- g) fillers and/or reinforcing fibers,
- wherein said halogen free flame retardant polyamide thermoplastic composition reaches UL-94 classification V0 at 0.8 mm and is free of halogens.
7 more elements
Dependencies are inferred from the claim text.