摘要:
A melt process for the synthesis of poly(metal aromatic esters) resins is provided. The process provides volatile byproducts which can be easily separated from the desired poly(metal aromatic ester) resin product. The poly(metal aromatic ester) resins are particularly useful as polymer additives for the purpose of such things as scavenging traces of water, activating sulphur accelerator crosslinking systems, and producing intumescent and polyester/metal oxide formulations.
摘要:
A polyester-polycarbonate composition comprising (A) at least one polyester prepared by the reaction of at least one alkanediol with at least one dicarboxylic acid or dialkyl ester thereof in the presence of a metallic catalyst, (B) at least one polycarbonate, (C) at least one organosilicate, the organosilicate being present in an amount effective to inhibit ester-carbonate interchange in the composition, optionally, (D) an organic or inorganic colorant, (E) an impact modifier, and (F) a stabilizer. A method for stabilizing polyester-polycarbonate compositions against ester-carbonate interchange is also provided.
摘要:
Aromatic polyesters, such as polybutylene-terephthalate, have been found to have a reduced tendency to drip during burning, if an effective amount of a polyhydroorganosiloxane is incorporated into the polyester. A further enhancement in the non-drip behavior is achieved by the addition of an effective amount of a transition metal oxide, such as a platinum oxide, or by the modification of the polyhydroorganosiloxane with an aliphatic alcohol such as benzyl alcohol in the presence of a catalytic amount of an alkali metal alkoxide.
摘要:
Polyester resins, optionally in combination with a polycarbonate, flame retarded with a halogenated bis-imide flame retardant agent and modified with a glass fiber reinforcing agent treated with a coating agent selected from certain polyepoxides and/or polyolefins exhibit markedly improved color characteristics.
摘要:
Aromatic thermoplastic compositions are provided having reduced total smoke released upon burning in accordance with ASTM-EO96. The aromatic thermplastic compositions utilize an effective amount of tin monoxide, and which are substantially free of antimony trioxide and brominated organic flame retardant resins. Minor amounts of polytetrafluoroethylene resin and glass fiber also contribute to the reduction of total smoke release upon burning of the thermoplastic polyester.
摘要:
An improved floatation separation process wherein the improvement comprises dissolving in a floatation bath sufficient alkali metal salt or alkaline earth metal salt of a phosphate, a pyrophosphate, a metaphosphate or a polyphosphate to provide a concentration greater than 1.0 grams per cubic centimeter and generally about 1.05 to about 1.6. g/cc. A particular salt is sodium dihydrogen phosphate. Preferably, the floatation process is employed to separate physical mixtures of plastic parts.
摘要翻译:一种改进的浮选分离方法,其中改进包括在浮选浴中溶解足够的磷酸盐,焦磷酸盐,偏磷酸盐或多磷酸盐的碱金属盐或碱土金属盐,以提供大于1.0克/立方厘米的浓度,通常为约1.05 至约1.6。 g / cc。 特定的盐是磷酸二氢钠。 优选地,浮选过程用于分离塑料部件的物理混合物。
摘要:
A flame retardant thermoplastic composition of at least one thermoplastic resin, at least about 20 percent by weight of an inorganic filler, and effective flame retarding amount of a metal acid pyrophosphate, and optionally, an impact modifier, an anti-drip agent and/or a second flame retardant.
摘要:
Polychromic articles are manufactured by solvent casting polycarbonate resins previously mixed with a photochromic dye and evaporating the solvent. The films produced can be insert injection molded with polycarbonate substrates to obtain photochromic articles.
摘要:
The present invention relates generally to blowing agent concentrates for forming porous, molded thermoplastic items, and, more particularly to blowing agent concentrates that are compatible with polycarbonate homopolymers, but which can be extruded without causing thermal decomposition of the blowing agent.