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US 12,703,772 B2Granted
Flame retardant polyamide
AssigneeBASF SE
InventorsOliver Steffen Henze, Birte Nitz, Tanja Lange
Life of this patent
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Abstract
A composition contains at least a copolyamide (PA-1) as a component (I), produced by polymerization of at least one lactam and of a monomer mixture (M) which contains at least a C32-C40 dimer acid and at least a C4-C12 diamine; and a flame retardant (F1) as a component (II). The flame retardant (F1) is selected from melamine cyanurates, magnesium hydroxide, and phosphorus-containing flame retardants. A process can be used for preparing such compositions, and the composition can be used for producing shaped articles.
Claims17
A composition, comprising:
- (I) 20% to 80% by weight of a copolyamide (PA-1) and (II) 20% to 40% by weight of a flame retardant, based on overall composition weight;
- wherein the copolyamide (PA-1) is prepared by polymerization of:
- (A) 15% to 84% by weight of at least one lactam, and (B) 16% to 85% by weight of a monomer mixture (M), based on a sum total of percentages by weight of the components (A) and (B);
- wherein the monomer mixture (M) comprises:
- (B1) 45 to 55 mol % of at least one C32-C40 dimer acid, and (B2) 45 to 55 mol % of at least one C4-C12 diamine;
- wherein the flame retardant is selected from the group consisting of a melamine cyanurate, magnesium hydroxide, a phosphorus-containing flame retardant, and a mixture of the melamine cyanurate and the phosphorus-containing flame retardant;
- wherein the phosphorus-containing flame retardant is selected from the group consisting of a derivative of phosphoric acid, a derivative of phosphonic acid, a derivative of phosphinic acid, and mixtures of two or more of these derivatives;
- and
- wherein the composition has a broad processing range of from 180° C. to 240° C.
6 more elements
Dependencies are inferred from the claim text.