摘要:
A method is provided for the production of poly(arylene sulfide) compositions comprisinga) contacting under suitable conditions a sulfur source, a dihalogenated aromatic compound and optionally other halogenated aromatic compounds, a polar organic compound, a base, and an alkali metal carboxylate in order to form a substantially liquid mixture comprising poly(arylene sulfide) polymer, polar organic compound and water;b) slowly cooling to form a slurry comprising solid poly(arylene sulfide) particles and liquid comprising the polar organic compound and water and adding an effective amount of at least one extraction agent;c) contacting the poly(arylene sulfide) particles with an aqueous solution containing calcium ions; andd) recovering the poly(arylene sulfide) composition.The poly(arylene sulfide) compositions prepared according to the invention method are especially useful for the preparation of fibers and monofilaments.
摘要:
An aromatic sulfide/ketone polymer is prepared from a dihaloaromatic ketone, alkali metal sulfide, water and a polar organic compound. The polymerization reaction mixture is subjected to a heat soak at an elevated temperature, then a separation agent is added under controlled conditions and the mixture is subsequently cooled to provide a mixture comprising particulate aromatic sulfide/ketone polymer. Biaxially-oriented film is made from the recovered particles of aromatic sulfide/ketone polymer by (1) washing the polymer particles with an aqueous calcium salt, (2) heating the washed particles to remove water, (3) molding the heated particles to form a sheet of polymer, (4) biaxially stretching the sheet above the glass transition temperature of the polymer to form a film, and (5) heat-setting the biaxially-oriented film under stretching tension for a time and at a temperature to increase strength properties and density.
摘要:
The heat stability of arylene sulfide resins, such as poly(p-phenylene sulfide) resin, is improved by the addition of cure retarders comprising an aminotriazole. The resin compositions of the invention are particularly applicable for reducing gel formation during melt extrusion.
摘要:
A process for the removal of poly(arylene sulfide) deposits on metal surfaces is provided by contacting the deposit with at least one diaryl ether under temperature conditions and for a time sufficient to remove said poly(arylene sulfide) deposits. A process for the cleansing of metal parts having poly(arylene sulfide) deposits is also provided which comprises treatment with a diaryl ether, and thereafter contacting the ether treated part with an alcohol, washing the part with water, drying the part, and thereafter contacting the dried part with concentrated HNO.sub.3 followed by water washing and drying.
摘要:
A process for removing poly(arylene sulfide) deposits from metal surfaces is provided which comprises contacting said deposits with a halogenated cleaning agent followed by contacting the remaining deposits with a solution of a aluminum halide in an aromatic hydrocarbon. In addition, a process for the cleansing of metal parts having poly(arylene sulfide) deposits is provided which comprises contacting the parts in a manner as described immediately above, and thereafter contacting the metal parts with a lower alkyl alcohol, washing the metal part with H.sub.2 O, drying the metal part, followed by treatment of the dried part with concentrated HNO.sub.3.
摘要翻译:提供了从金属表面除去聚(亚芳基硫醚)沉积物的方法,其包括使所述沉积物与卤化清洁剂接触,然后将剩余的沉积物与卤化铝在芳族烃中的溶液接触。 另外,提供了一种用于清洁具有聚(亚芳基硫醚)沉积物的金属部件的方法,其包括以上述方式使部件接触,然后使金属部件与低级烷基醇接触,将金属部件与 H 2 O,干燥金属部分,然后用浓HNO 3处理干燥部分。
摘要:
A process for the removal of poly(arylene sulfide) deposits is provided which comprises contacting said deposits with a solution comprising an alkali metal hydrosulfide in a lactam. In addition, a process for the cleaning of metal parts having poly(arylene sulfide) deposits is provided by contacting the metal parts in the manner as described immediately above, contacting the metal part with a lower alkyl alcohol, washing said metal part with water, drying said metal part, contacting the dried part with concentrated HNO.sub.3 followed by water washing and drying.
摘要:
The heat stability of arylene sulfide resins, such as poly(p-phenylene sulfide) resin, is improved by the addition of cure retarders comprising Group IIA or Group IIB metal salts of fatty acids. The resin compositions of the invention are particularly applicable for reducing gel formation during melt extrusion.
摘要:
The heat stability of arylene sulfide polymers, such as poly(p-phenylene sulfide), is improved by the addition of cure retarders comprising alkaline earth metal nitrites.
摘要:
Poly(arylene sulfide) resins are modified by melt mixing a resin with a basic additive to form a resin product composition. The basic additive is selected from the group consisting of inorganic hydroxides, inorganic oxides and organic metal salts wherein the metals are from Group IA, IIA, or IIB and the salts are of carboxylic acids and phenols. The product compositions are suitable for injection molding, film forming and fiber spinning processes.
摘要:
The heat stability of arylene sulfide resins, such as poly(p-phenylene sulfide) resin, is improved by the addition of cure retarders comprising phenolic amide or ester-based antioxidants. The resin compositions of the invention are particularly applicable for reducing gel formation during melt extrusion.