Brominated indans

Brominated indan in nylon 6,6 results in a high oxygen index value. A further increase can be achieved by combination with surface-treated magnesium hydroxide.63... 

Finberg, I. Utevski, L. Kallos, M. Brominated indan as highly compatible systems. Styrenic plastics. IMEC 8, 1997, 19. 

Brominated indans are also a non-DBDPO option. They are soluble flame retardants, but do not lower the heat resistance of the styrenic polymer because the glass transition temperature of, e.g., FR-1808 is close to that of polystyrene [26,27]. 

FR-1808 is a brominated indane containing 73% bromine and is suitable for application where good flow and good impact properties are needed. This combination of properties makes possible the use of short cycle times and enables production of large parts with thin sections. 

New fire retardants not related to the chemistry of diphenyl ethers have been developed for more environmentally friendly applications.61-62 Among these newer compounds available for use in styrenic copolymers are a proprietary compound, brominated trimethylphenyl indan, brominated epoxy oligomers, and tris(tribromophenyl) cyanurate. 

Y = F) with sodiiun methoxide, but undergoes ring-opening with potassium hydroxide in t-butyl alcohol to give the acid o-C F4H-CF CF-C02H, whidi is converted into the dichloro-compound o-CsFaH-CFCl-CFCl-COaH by treatmmt with phosphorus pentachloride followed by hydrolysis. Both 3-chloroh tafluoro-and octafluoro-indene are converted into the oxo-sulphonic add (32) by 20% oleum, and the dibromide (33a) or the nitro-indane (33b) is formed when octa-fluoioindene reacts with bromine or HNOa-HF, respectively. The fomiation of the antiaromatic cabocation (34) when octafluoroindene dissolves in SbFs-SOa at -40°C has been briefly studied by n.m.r. spectroscopy. ... 

Bromine in acetic acid added to a suspension of 2-phenyl-2-methallylindan-l,3-dione in acetic acid, and after 1.5 hrs. at 25° poured into water 2-phenyl-2-(2-hydroxy-2-methyl-3-bromopropyl)indan-l,3-dione. Y 80%. A. L. Johnson and F. Davidson, J. Org. Chem. 39, 1784 (1974). 

As a result of both gradual voluntary production cuts and legislative measures, production of technical mixtures of PBDEs has decreased and conversely there have been increases in the production of alternative non-PBDE flame retardants. The alternative retardants include bis(2,4,6-tribromophenoxy)ethane (BTBPE, 12-141), octabromo-1-phenyl-1,3,3-trimethyhndane (Br indane, 12-142), decabromodiphenylethane (DBDPE, 12-143) and certain other compounds. These substances have similar properties to PBDEs, contain an aromatic nucleus, more bromine atoms and are... 

Br indane is an additive flame retardants, which is manufactured under the name of FR-1808 by reaction of l-phenyl-1,3,3-trimethyhndane with bromine through catalysis with Lewis acids. It is used in technical resins and polystyrene foams. Br indane is kinder to the environment than PBDEs. 

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