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US 10,119,019 B2Granted
Environmental friendly flame retardant moulding compositions based on thermoplastic impact modified styrenic polymers
AssigneeItalmatch Chemicals S.P.A.
InventorsUgo Zucchelli, Massimiliano Rosichetti
Life of this patent
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Abstract
Object of the present invention is to provide halogen-free highly flame retardant styrene impact modified polymers able to perform V0 classification on thin items, according to international standard UL-94.
Claims13
Halogen free flame retardant impact modified styrenic thermoplastic composition consisting entirely of:
- a) one or more thermoplastic impact modified styrenic polymers;
- b) a first flame retardant (FR) component comprising one or more hypophosphorous acid metal salts having a phosphorus valence state being equal to +1;
- c) a second flame retardant (FR) component comprising one or more aromatic phosphorus esters;
- d) one or more antidripping agents;
- e) at least one of fillers and reinforcing fibers;
- and
- f) conventional additives.
4 more elements
A method for forming a flame retardant moulding product comprising:
- providing a composition consisting entirely of one or more thermoplastic impact modified styrenic polymers, a first flame retardant (FR) component comprising one or more hypophosphorus acid metal salts having a phosphorus valence state being equal to +1, one or more aromatic phosphorus esters as a second FR component, one or more antidripping agents, at least one of fillers and reinforcing fibers, and conventional additives;
- and
- manufacturing a moulding composition or a moulding article using said composition.
Dependencies are inferred from the claim text.