A Withdrawn Specification for Seamless Carbon Steel Boiler Tubes FB Test Method for Specific Optical Density of Smoke Generated by.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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Astm F 83 Pdf 13
Julia Taylor taking it in the assviews. These branching agents include polyfunctional organic compounds containing at least three functional groups selected from hydroxyl, carboxyl, carboxylic anhydride, haloformyl, and mixtures of the foregoing functional groups. Specific examples of bisphenol compounds that can be represented by formula 3 include 1,1-bis 4-hydroxyphenyl methane, 1,1-bis 4-hydroxyphenyl ethane, 2,2-bis 4-hydroxyphenyl propane bisphenol A or BPA2,2-bis 4-hydroxyphenyl butane, 2,2-bis 4-hydroxyphenyl octane, 1,1-bis 4-hydroxyphenyl propane, 1,1-bis 4-hydroxyphenyl n-butane, 2,2-bis 4-hydroxymethylphenyl propane, 1,1-bis 4-hydroxy-t-butylphenyl propane, 3,3-bis 4-hydroxyphenyl phthalimidine, 2-phenyl-3,3-bis 4-hydroxyphenyl phthalimidine PPPBPand 1,1-bis 4-hydroxymethylphenyl cyclohexane DMBPC.
Process for preparing polysiloxane-polycarbonate block cocondensates using a salt of a weak acid. In an alternative embodiment, it has been found that other brominated oligomers can be used in place of the TBBPA copolymer, such as other brominated polycarbonate oligomers or brominated epoxy oligomers.
NBS Smoke Density Chamber, Smoke Toxicity Chamber, ASTM Smoke Density Chamber
Chlorides of aliphatic monocarboxylic acids with less than or equal to 22 carbon atoms are useful. Use of a combination of these two poly siloxane-carbonate s can provide a composition having both good colorability and impact properties. The first, second, optional third, and optional additional polycarbonates, as well as the TBBPA copolymer and brominated polycarbonate oligomer have repeating structural carbonate units of formula Polycarbonate compositions, articles formed therefrom, and methods of manufacture thereof.
In an embodiment, an interfacial polymerization reaction to form carbonate linkages uses phosgene as a carbonate precursor, and is referred to as a phosgenation reaction. For example, a poly siloxane-carbonate having a relatively lower weight percent e.
The branching agents can be added at a level of 0. Polycarbonate-polysiloxane copolymers, methods for the preparation thereof, and articles derived therefrom. The inventors hereof have discovered that flame retardant, low smoke polycarbonate compositions can unexpectedly be obtained when xstm specific polycarbonate compositions, neither of which meets certain low smoke standards and low heat release standards, are used in combination.
A specifically useful melt process for making polycarbonates uses a diaryl carbonate ester having electron-withdrawing substituents on the aryls.
An article selected from a molded article, a thermoformed article, a foamed article, an extruded film, an extruded sheet, one or more layers of a multi-layer article, a substrate for a coated article or a substrate for a metallized article made from the composition of claim 1.
F814–83 foregoing groups can be fully or partially halogenated with fluorine, chlorine, bromine, or iodine, or a combination comprising at least one of the foregoing. The descriptions of the polycarbonates and polycarbonate copolymers used in the Examples are described in Table 1.
ASTM International : Withdrawn Standards
The data in Table 7 shows the effect of TiO 2 on the smoke density performance of a composition with and without poly siloxane-carbonate present. This disclosure generally relates to polycarbonate compositions, and more particularly d814-83 flame retardant polycarbonate compositions containing specific combinations of polycarbonates.
CEX 8 has no siloxane present and it passes the OSU flame and peak heat release test with values below 65 but the Dmax values while passing with a value belowHowever, CEX 8 is extremely brittle which would make it difficult to machine and form into parts, and has a high density, which would by deleterious to weight savings needed to manufacture fuel efficient aircraft.
The composition of claim 5 wherein the first polycarbonate is derived from bisphenol A and formula 2 and wherein formula 2 has the formula. In the alternative embodiments of the polycarbonate compositions comprising the first polycarbonate the poly siloxane-carbonate and a brominated oligomer, an additional polycarbonate that is not the same as the first poly siloxane-carbonate or the brominated oligomer is atm.
In a specific embodiment, the polycarbonate is a linear homopolymer or copolymer comprising units derived from bisphenol A, in which each of A 1 and A 2 is p-phenylene and Y 1 is isopropylidene in formula 4.
Aromatic polycarbonate resin composition and molded item and member for lighting including the same. The composition of claim 1wherein the composition has a density of less than 1. Specifically, the additional polycarbonate does not contain siloxane units or bromine.
The polycarbonate compositions r814-83 further have excellent impact strength, particularly when the average value of E is higher, i.
Examples of diaryl carbonate esters with electron withdrawing substituents include bis 4-nitrophenyl carbonate, bis 2-chlorophenyl carbonate, bis 4-chlorophenyl carbonate, bis methyl salicyl carbonate, bis 4-methylcarboxylphenyl carbonate, bis 2-acetylphenyl carboxylate, bis 4-acetylphenyl carboxylate, or v814-83 combination comprising at least one of f81-483 foregoing.
R 2 is each independently a C 7 -C 30 hydrocarbon group, and. Specific dicarboxylic acids are terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, cyclohexane dicarboxylic acid, or combinations comprising at least one of the foregoing.
The total amount of additives other than any filler or reinforcing agents is generally 0.
Flame retardant polycarbonate compositions, methods of manufacture thereof and articles comprising the same. As the brominated copolycarbonate content aatm the yellowness index increases significantly from 2. Illustrative articles include access panels, access doors, air flow regulators air gaspers, air grilles, arm rests, baggage storage doors, balcony components, cabinet walls, ceiling panels, door pulls, door handles, duct housing, enclosures for electronic devices, equipment housings, equipment panels, floor panels, food carts, food trays, galley surfaces, grilles, handles, housings for TVs and displays, light panels, magazine racks, telephone housings, partitions, parts for trolley carts, seat backs, seat components, railing components, seat housings, shelves, side walls, speaker housings, storage compartments, storage housings, toilet seats, tray tables, trays, trim panel, window moldings, window slides, windows, and the like.
The composition of claim 1wherein E in formula 1 and formula 2 has an average value of 25 to 75. The Ar groups in formula 1 can be derived from a T814-83 dihydroxy aromatic compound, for example a dihydroxy aromatic compound of formula 4589or 10 above.