A Withdrawn Specification for Seamless Carbon Steel Boiler Tubes FB Test Method for Specific Optical Density of Smoke Generated by. Test according to ASTM E Standard Test 6, 28, 2 3. Specific optical density. 0, 1, 0, 2, 1, 8, 3, 7, Astm F 83 Pdf 13 DOWNLOAD. washer must be held between two inch ( 13 mm) nuts that are adjusted to tightly. (ASTM) Standard Test Method ASTM.
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R 2 is each independently a C 7 -C 30 hydrocarbon group. Various endcaps can be present, for example polycarbonates having phenol endcaps or 2,4,6-tribromophenol endcaps can be used. In an embodiment, the polysiloxane comprises R groups that have minimum hydrocarbon content. Still further in this embodiment, when the siloxane units of the first polycarbonate are present in an amount of at least 2. Multi-functional photoactive additives with improved chemical and flame resistance.
For example, —CHO is attached through carbon of the carbonyl group. The composition of claim 1wherein the composition is substantially free of a fluorinated polyolefin encapsulated by poly styrene-acrylonitrile. The first satm, the brominated oligomer, and the optional additional polycarbonate are present in amounts effective to provide at least 0.
Centrifuges three through eight substantially removed residual ions by extracting the polymer solution with DI water. The composition f184-83 claim 31wherein the third polycarbonate is a homopolymer with bisphenol A carbonate units.
The most commonly used water immiscible solvents include methylene chloride, 1,2-dichloroethane, chlorobenzene, toluene, and the like. When present, inorganic flame retardant salts are present in amounts of 0. Such additives can be mixed at a suitable time during the mixing of the components for forming the composition. It is generally noted that the overall size, shape, thickness, optical properties, and the like of the polycarbonate sheet can vary depending upon the desired application.
Qstm of aliphatic monocarboxylic acids with less than or equal to g814-83 carbon atoms are useful. In the event of a fire, components made from materials having these properties can increase the amount of time available for escape and provide for better visibility during a fire Despite extensive investigation, current materials that meet these FAR standards could be further improved with respect to other properties. Methods for preparing the brominated polycarbonates and the poly siloxane-carbonate copolymers are described after Table 1.
The composition of claim 1astmm the E smoke test Dmax has a value of less than when tested at a thickness of 1. Volatile monohydric phenol is removed from adtm molten reactants by distillation and the polymer is isolated as a molten residue.
All cited patents, patent applications, and other references are incorporated herein by reference in their entirety. In an embodiment, E has an average value of 5 to10 to10 to 50, 25 to 50, or 35 to These groups can be in the form of a single saturated or unsaturated ring, or a fused polycyclic ring system wherein the fused rings are saturated, unsaturated, or aromatic. R 3 is each independently a divalent C aliphatic group.
This test method uses a photometric scale to measure the density of smoke generated by the material during burning. This application is a divisional of U. In order to demonstrate the improved color stability performance of the poly siloxane-carbonate and brominated copolycarbonate compositions over those found in art, the compositions were formulated with and without UV stabilization additives in a bright white color package.
Govmark Fire & Flammability Test Instruments
The use of pigments such as titanium dioxide produces white compositions, which are commercially desirable. The compositions therefore include amounts of the first and second polycarbonates or as described below, other brominated oligomer effective, i.
Excellent transparency can also be obtained when the polycarbonate composition comprises the first polycarbonate in an amount effective to provide at least 0. The impact of replacing the poly siloxane-carbonate with other silicone-containing additives was also investigated and the results shown in Table The pellets can be used for foaming, molding into articles, or they can be used in forming a sheet of the flame retardant polycarbonate composition.
The safety standards for aircraft and transportation systems used in the United States include a smoke density test specified in FAR G814-83 7 in this test passed the D max flame test.
ASTM International : Withdrawn Standards
Compounds are described using standard nomenclature. Centrifuge two removed the catalyst by extracting the polymer solution with aqueous hydrochloric acid pH 1.
The articles manufactured from the compositions described herein can thus be a component of an aircraft, train, marine, subway vehicle, or other transportation applications. In an embodiment, the dihydroxy aromatic compound is Bisphenol-A.
In an embodiment, R c and R d taken t814-83 is a C cyclic alkylene or a heteroatom-containing C cyclic alkylene comprising carbon atoms and heteroatoms with a valency of two or greater.
The siloxane blocks have an average of 5 to units. Combining the wstm from the various Tables shows achieving the targeted density maximum of 1.
When k is 1 and i is 0, the ring as shown in formula 8 contains 4 carbon atoms, when k is 2, the ring as shown contains 5 carbon atoms, and when k is 3, the ring contains 6 carbon atoms. In some applications, it can be desirable to have a transparent article.
Further in this embodiment, when the siloxane blocks have an average of 25 to 75 units, specifically 25 to 50 units, and at least 2. Although the reaction conditions for interfacial polymerization can vary, a process generally involves dissolving or asfm an aromatic dihydroxy reactant in aqueous caustic adtm or potash, adding the resulting mixture to a water-immiscible solvent medium, and contacting the reactants with a carbonate precursor in the presence of a catalyst such as, for example, triethylamine or a phase transfer catalyst, under controlled pH conditions, e.
Branched brominated polycarbonate oligomers can also be used, as can compositions of a linear brominated polycarbonate oligomer and a branched brominated polycarbonate oligomer.
NBS Smoke Density Chamber, Smoke Toxicity Chamber, ASTM Smoke Density Chamber
Anti-drip agents in most embodiments are not used in the polycarbonate compositions. Illustrative examples of dihydroxy aromatic compounds are resorcinol i.
Antioxidants are used in amounts of 0.