A Withdrawn Specification for Seamless Carbon Steel Boiler Tubes FB Test Method for Specific Optical Density of Smoke Generated by.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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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 ast, for the compositions of Table 9 was It will be understood that where the fused ring is aromatic, the ring as shown in formula 8 will have an unsaturated astj linkage where the ring is fused.
Siloxane-polyestercarbonates have low melt flow and good color stability to indoor light, but may shift in color upon exposure to UV light. 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. The descriptions of the polycarbonates and polycarbonate copolymers used in the Examples are described in Table 1. Flame retardant poly siloxane copolymer compositions, methods of manufacture, and articles formed therefrom.
The total phosgene addition amount was g On the other hand, the presence of aliphatic ester units can diminish the heat release values. In particular, use of aliphatic groups is minimized in order to maintain the flammability performance of the polycarbonates.
SiPC 1 1D10 Copolymer: In another specific embodiment, the polydiorganosiloxane units are derived from polysiloxane bisphenol of formula After the phosgene addition was complete, a sample from the reactor was obtained and verified to be substantially free of unreacted monomers and chloroformates. Without being bound by theory, it is believed that the unexpected combination of low smoke density and low aatm 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.
Ranges disclosed herein are inclusive and combinable e. 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 CEX 7 contains no bromine and fails both the OSU 2 min total and peak heat release tests with values greater than The disclosure is further illustrated by the following Examples.
In addition, many modifications can be made to adapt a particular situation or material to the teachings of the invention without departing from zstm scope thereof.
Astm F 83 Pdf 13
Similarly, a poly siloxane-carbonate can be used with a poly siloxane-etherimide to improve impact. The f8144-83 blocks have an average of 5 to units. Results are in Table 8.
When used at levels commonly employed to improve flame performance, improve the color stability, or asttm haze in polycarbonates, the additives showed no effect on the flame retardant performance of the polycarbonate compositions. R 3 is each independently a divalent C aliphatic group.
Multi-functional photoactive additives with improved chemical and flame resistance. Titanium dioxide is a common additive used to increase the whiteness of polymer compositions. View or download PDF.
Process for preparing polysiloxane-polycarbonate block cocondensates using a salt of a weak acid. This disclosure generally relates to polycarbonate compositions, and more ff814-83 to flame retardant polycarbonate compositions containing specific combinations of polycarbonates.
These other sources of silicone are therefore much less effective at suppressing smoke in the smoke tests than poly siloxane-carbonate described herein.
In some embodiments a combination of two or more different poly siloxane copolymers, in particular two or more different poly siloxane-carbonate s are used to obtain the desired properties. In still another embodiment, M is methoxy, n is 0 or 1, R 3 is a divalent C aliphatic group, and R is methyl.
F184-83, if a term in the present application contradicts or conflicts with a term in the incorporated reference, the term from the present application takes precedence over the conflicting term from the incorporated reference.
The branching agents can be added at a level of 0. Low smoke polycarbonate composition and laminates, method of manufacture and product made therefrom.
Govmark Fire & Flammability Test Instruments
In another embodiment, when each of A 1 and A 2 is phenylene, Y 1 is para f8814-83 each of the hydroxyl groups on the phenylenes. To download Calle 13 ft tego calderon. In an embodiment, the polycarbonates and brominated oligomer if used are combined e. The composition of claim 1wherein E in formula 1 and formula 2 has astj average value of 25 to 75. In another embodiment, an effective amount of phase transfer catalyst can be 0.
The polycarbonate compositions can be formed e.
NBS Smoke Density Chamber, Smoke Toxicity Chamber, ASTM Smoke Density Chamber
The composition of claim 1 wherein the first polycarbonate is derived from bisphenol A and formula 2 and wherein formula 2 has the formula. Materials used in the transportation industry, asym those that pass the OSU and DsMax smoke requirements, often have poor stability when exposed to outdoors light.
The extruder was a nine-barrel machine approx. The brominated polymers can differ in one or more of a property e.
In an embodiment, the poly siloxane-carbonate comprises units derived from polysiloxane bisphenols 14 as described above, specifically wherein M is methoxy, n is 0 or 1, R 3 is a divalent C aliphatic group, and R is methyl, still more specifically a polysiloxane bisphenol of formula 15 or The anti-drip agent can be encapsulated by a rigid copolymer, for example styrene-acrylonitrile copolymer SAN.
The composition of claim 19wherein the E smoke test Dmax has a value of less than when tested at a thickness of 1. 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 present.
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 dihydroxy aromatic compound can be one of formula 56789or Although realized in.
The compositions prepared with a single screw extruder were made as follows.