Patents regarding flame retardants

Patent profile:

The present invention relates to the use of organic oxy imides as flame retardants for plastics. Plastic material compositions, mouldings and flame retardants compositions are also claimed.

Benefits for potential applications:

• Halogen‑free system: reduced smoke/toxic gas; supports RoHS/WEEE compliance
• Effective at low dosages; less impact on mechanics, colour, and processing
• Strong synergy with phosphinate/phosphonate/hypophosphite FRs for reduced FR loading and superior UL 94 ratings
• Replacement of ATO in brominated FR formulations
• Broad polymer coverage especially PP and PE, but also TPU, styrenics, PA, polyesters,
• Low migration options via bridged/oligomeric/polymeric oxyimides
• Drop‑in implementation via standard compounding or masterbatch

Patent profile:

The present invention claims the use of oxymide-containing copolymers or polymers as fireproofing agents for plastics, rheology modifiers for plastics and as initiators for polymerization- and grafting processes and/or cross-linking- or coupling agents. Plastic material compositions, mouldings and flame retardants compositions are additional patent claims.

Benefits for potential applications:

• Multifunctional additive: one chemistry delivers FR performance, rheology modification, and reactive initiation/coupling
• Halogen‑free; reduced smoke/toxicity; improved EHS and compliance
• Low migration/volatility due to polymeric architecture; better durability and property retention
• Synergy with phosphorus FRs (phosphinates/phosphonates/hypophosphites) to reach UL 94 V‑ratings at lower total loading
• Enables in‑situ grafting/crosslinking and blend compatibilization; improves melt strength and dispersion
• Accessible synthesis from commercial MAH/itaconic anhydride copolymers via polymer‑analogous reactions

Patent profile:

The invention relates to the use of phosphorous-containing organic oxyimides) as flame retardants and/or stabilizers for plastics. Plastic material compositions, mouldings and flame retardants compositions are additional patent claims.

Benefits for potential applications:

• Dual functionality: one additive provides flame retardancy and oxidative stabilization; fewer components and simpler formulation
• Strong synergy with phosphorus FRs (phosphinates/phosphonates/hypophosphites) enables UL 94 ratings at lower total loading
• Tunable P-chemistry (phosphite/phosphonite/phosphate) for balancing FR action and antioxidant performance
• Broad polymer coverage: especially PP/PE; also PA, PET/PBT/PLA, PC, styrenics, PVC, PMMA, POM; paints and coatings
• Potentially halogen-free systems; reduced smoke/toxic gas vs brominated packages
• Standard processing (compounding/masterbatch); suitable for injection molding, extrusion, films, fibers, coatings

Patent profile:

The present invention relates to the use of halogen-free sulphonic acid esters and/or sulphinic acid esters as flame retardant and/or flame retardant synergists in plastics. The invention furthermore relates to the use of said compounds as radical generators in plastics, particularly in order to increase the molecular weight of the plastics, to branch and/or cross-link the plastics, to reduce the molecular weight of the plastics, to influence the molecular weight distribution of the plastics and to graft unsaturated monomers to the plastics. Plastic material compositions, mouldings and flame retardants/radical generator compositions are claimed additionally. 

Benefits for potential applications:

• Halogen‑free FR options with strong synergy to phosphorus FRs; enables UL 94 V‑0/V‑2 and DIN 4102 B2 performance at low total loadings
• Multifunctional: acts as flame retardant, FR synergist, and controlled radical generator (increase molecular weight e.g. of PE, branch/cross‑link, reduce molecular weight e.g. of PP, adjust MWD, grafting of monomers)
• Good compatibility/solubility in polymers; effective at low dosages; accessible synthesis from industrial feedstocks
• Tunable decomposition temperature according to application
• Supports antimony‑free halogenated systems or fully halogen‑free FR packages

Patent profile:

The invention relates to cellulose esters, the ester groups of which are at least partially containing phosphorus and are based on unsaturated carboxylic acids and reactive phosphorus components, wherein the latter are preferably phosphorus derivatives of sugar alcohols or of tartaric acid derivatives. The invention also relates to methods for preparing novel phosphorus-containing cellulose esters and to their use as flame retardants for plastics.

Benefits for potential applications:

• Halogen‑free flame retardancy: embedded phosphorus enables efficient char formation and heat release reduction without halogens.
• Low migration, high permanence: polymeric, covalently bound phosphorus minimizes blooming/volatility vs. small‑molecule FRs.
• Bio‑based content: cellulose backbone and phosphorus components from sugar alcohol/tartaric acid derivatives support sustainability goals.
• Processing versatility: suitable for compounding, masterbatching, coatings, and reactive blending; tunable degree of substitution.
• Formulation flexibility: synergistic FR withother phosphorus or nitrogen sources and mineral FRs to meet stringent ratings with balanced mechanics.