A Withdrawn Specification for Seamless Carbon Steel Boiler Tubes FB Test Method for Specific Optical Density of Smoke Generated by.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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Achieving very low smoke density and very low flammability ratings are conflicting requirements.
The poly siloxane copolymer compositions, for example the poly siloxane-etherimide copolymer compositions, can further be formulated to have a hydrogen to carbon ratio of 0. In particular, use of aliphatic groups is minimized in order to maintain the flammability performance of asrm polycarbonates.
ASTM International : Withdrawn Standards
Specific dicarboxylic acids are terephthalic acid, isophthalic acid, naphthalene dicarboxylic acid, cyclohexane dicarboxylic acid, or combinations comprising at least one of the foregoing.
Combining the results from the various Tables shows achieving the targeted density maximum of 1. For example, aromatic ester units can diminish color stability of the polycarbonate composition during processing and when exposed to UV light.
In contrast CEX 12, 13, and 14 have slightly higher amounts of siloxane 0. In a specific embodiment, the polydiorganosiloxane units are derived from a polysiloxane bisphenol of formula High ignition temperature polymers substituted with halogen substituted aromatic groups. Flame retardant polycarbonate compositions, methods of manufacture, and articles formed therefrom. The D30 and D40 poly siloxane-carbonate -containing compositions and corresponding controls were performed on a twin screw extruder.
Ashm total phosgene addition amount was g Combinations comprising at least one of the foregoing f184-83 aromatic compounds can also be used. The present invention generally relates to composites and articles made from.
Chlorides of aliphatic monocarboxylic acids with less than or equal to 22 carbon atoms are useful. 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 addition to the polycarbonates and TBBPA copolymer or brominated oligomer, the polycarbonate compositions can include various additives ordinarily incorporated into flame retardant compositions of this type, with the proviso that the additive s are selected so as to not adversely affect the desired properties of the thermoplastic composition significantly, in particular low heat release and low smoke density.
In a specific embodiment, where R 2 is C arylene-alkylene, the polydiorganosiloxane units are derived from polysiloxane bisphenols of formula If a combination of aromatic dihydroxy compounds is used, then the combinations can contain 25 to 55 mole percent of the brominated aromatic dihydroxy compounds and 75 to 65 mole percent of a non-brominated dihydric phenol.
In Table 6, compositions are shown having 3. View or download PDF. Flame retardant polycarbonate compositions with improved weathering performance containing cyanoacrylic esters. Die Erfindung betrifft eine ultra-leichte hitze- und flammbestndige oder -verzgernde Verbundplatte bzw. To the batch in the feed tank was added dilution dichloromethane 10 L then the mixture was purified using a train of liquid-liquid centrifuges.
In an embodiment, the transparent polycarbonate compositions are used for the manufacture of balcony components, balusters for stairs and balconies, ceiling panels, covers for life vests, covers for storage bins, dust covers for windows, layers of an electrochromic device, lenses for televisions, electronic displays, gauges, or instrument panels, light covers, light diffusers, light tubes and light pipes, mirrors, partitions, railings, refrigerator doors, shower doors, sink bowls, trolley cart containers, trolley cart side panels, windows, or the like, particularly in aircraft, marine transports, or trains.
Hardcoats are known in the art, and include, for example, various polyacrylates such as hyperbranched polyacrylates, silicones, polyfluoroacrylates, urethane-acrylates, phenolics, perfluorpolyethers, and the like.
EX 34 with TiO 2 possessed a similar D max value to EX with the flame retardant, color stabilization, or haze reducing additives EX 34 had a D max of 21, whereas the highest D max values measured for the compositions of Table 9 was In an embodiment, the polycarbonate compositions contain a first polycarbonate certain poly siloxane-carbonate s as further described belowa second polycarbonate certain brominated polycarbonates as further described belowand optionally a third polycarbonate different from the first and the second polycarbonates, in amounts effective to satisfy at least the smoke generation requirements of the American Society for Testing and Materials ASTM standard E The safety standards for aircraft and transportation systems used in the United States include a smoke density test specified in FAR US USB2 en Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.
The branching agents can be added at a level of 0.
Without being bound by theory, it is believed that the unexpected combination of low smoke density and low heat release values are obtained by careful selection and balancing of the absolute and relative amounts of the first, second, and optionally third polycarbonates, including selecting an amount of first polycarbonate and the block size of the siloxane blocks in the first polycarbonate to provide at least 0.
Suitable aliphatically unsaturated monohydric phenols included, for example, eugenol, 2-allylphenol, 4-allylphenol, 4-allylmethylphenol, 4-allylphenylphenol, 4-allylbromophenol, 4-allylt-butoxyphenol, 4-phenylallylphenol, 2-methylpropenylphenol, 2-allyl-4,6-dimethylphenol, 2-allylbromomethylphenol, 2-allylmethoxymethylphenol, and 2-allyl-4,6-dimethylphenol. In still other embodiments, it has been found that limiting the amount of the optional third polymer, together with use of specific first and second polycarbonates can produce compositions with advantageous properties.
While not wishing to be bound by any specific theory, it is believed that providing the siloxane in a less volatile, less mobile higher Tghigh molecular weight polymer could help to maintain the siloxane in the composition longer and keep the siloxane better dispersed during burning.
NBS Smoke Density Chamber, Smoke Toxicity Chamber, ASTM Smoke Density Chamber
These include monocyclic, mono-carboxylic acid chlorides such as benzoyl chloride, C 1 -C 22 alkyl-substituted benzoyl chloride, toluoyl chloride, halogen-substituted benzoyl chloride, bromobenzoyl chloride, cinnamoyl chloride, 4-nadimidobenzoyl chloride, and combinations comprising at least one of the foregoing; polycyclic, mono-carboxylic acid chlorides such as trimellitic anhydride chloride, and naphthoyl chloride; and combinations of monocyclic and polycyclic mono-carboxylic acid chlorides.
In addition, it is to be 8f14-83 that the described elements can be combined in any suitable manner in the various embodiments. Mixtures comprising linear polycarbonates and branched polycarbonates can be used.
Non-streaking black color formulations for polycarbonate-siloxane copolymers and blends.
Bruised Beaten and Wet. The polycarbonate compositions are particularly useful in train and aircraft, for example a variety of aircraft compartment interior applications, as well as interior applications for other modes of transportation, such as bus, train, subway, marine, and the like.
Govmark Fire & Flammability Test Instruments
The composition of claim 1wherein E in formula 1 and formula 2 has an average value of 25 to 50. The composition of claim 1further comprising an additional polymer comprising bromine, wherein the additional polymer is not the same as the first polycarbonate, the second polycarbonate, or the optional third polycarbonate; and wherein the additional polymer is present at 0.
High clarity, low yellowness, and low density values in combination with excellent flame and smoke performance are critical for use of these compositions ast airplane window applications and so higher bromine content compositions are expected to have limited utility in window applications.