摘要:
This invention relates to solvent systems useful for foam nozzle cleaning, which solvent systems are formed by combining at least a brominated compound, an alcohol and a stabilizer in amounts such that the solvent system has no flash point.
摘要:
A process for removing deposits on metal surfaces, derived from certain poly(arylene sulfide) polymers is provided by contacting the metal surfaces with a polyamine containing compound under conditions suitable to remove said deposits on the metal surfaces.
摘要:
An object of the present invention is to provide a method of producing a solution of a thermoplastic polymer such as a polyester resin and/or a solution of a depolymerization product of a thermoplastic polymer by efficiently dissolving the thermoplastic polymer and/or the depolymerization product of the thermoplastic polymer. The method of producing a solution of a thermoplastic polymer and/or a solution of a depolymerization product of a thermoplastic polymer, which includes supplying a thermoplastic polymer, in a melted state, from a raw material supply port to an interior of a reactor, discharging the polymer through holes of a perforated plate, and then bringing the polymer into contact with a solvent vapor while flowing down along the surface of a support disposed inside the reactor.
摘要:
Die Erfindung betrifft ein Mittel auf Lösungsmittelbasis zum Reinigen von Vorrichtungen, welche zum Mischen und Verarbeiten reaktiver, unter Polymerbildung reagierender, hochviskoser Mehrkomponentenmischungen vorgesehen sind. Zwecks Verbesserung der Löseeigenschaft des Lösungsmittels für die mehr oder weniger polymerisierten Mischungen enthält das Lösungsmittel ein Kettenabbruchmittel. Für Zweikomponentensysteme auf Basis flüssiger Polysulfidpolymere sind in dem Lösungsmittel als Kettenabbruchmittel oder Kettenabbaumittel Mercaptogruppen aufweisende Verbindungen der allgemeinen Formel R-SH oder Di- oder Polysulfltigruppen aufweisende Verbindungen der allgemeinen Formel R-S n -R enthalten, in welchen Formeln n≧2 ist und R gleiche oder verschiedene Alkyl-, Aryl- oder substituierte Alkyl-, Aryl-Reste sind. Für Zweikomponenten-Polyurethan-Systeme sind im Lösungsmittel als Kettenabbruchmittel Verbindungen mit einem zerewitinoff-aktiven Wasserstoffatom im Molekül der allgemeinen Formel HY-R 1 enthalten, worin und R 1 ein beliebiger organischer Rest ist, der mit sich selbst oder mit Isocyanatgruppen keine Polyadditions- oder Polykondensationsreaktionen eingeht.
摘要:
The present patent of invention describes a recycling process to recover fibrous reinforcing material of composite materials, particularly carbon fiber, primary reactor compound (101), for the controlled pyrolysis and oxidation of the composite material matrix (resin) at low temperature (400°C to 500°C) and a system for treating waste gases produced by thermal decomposition of composite material matrixes which employs a secondary reactor (201), containing within the same a thermal plasma arc (211). The main characteristic of the process, within the scope of the carbon fiber recycling, is the possibility of maintaining the fabric web, obtaining fabrics made of pure carbon fiber, without a significant amount of residues and preserving their structural characteristics. The thermal plasma allows managing high temperatures (2,000°C to 15,000°C) in a controlled atmosphere, which allows the dissociation of long chains of molecules into ions that are recombined to produce combustible gases and other acid or alkaline gases that are easily neutralized and retained in gas cleaning systems.
摘要:
The present patent of invention describes a recycling process to recover fibrous reinforcing material of composite materials, particularly carbon fiber, primary reactor compound (101), for the controlled pyrolysis and oxidation of the composite material matrix (resin) at low temperature (400°C to 500°C) and a system for treating waste gases produced by thermal decomposition of composite material matrixes which employs a secondary reactor (201), containing within the same a thermal plasma arc (211). The main characteristic of the process, within the scope of the carbon fiber recycling, is the possibility of maintaining the fabric web, obtaining fabrics made of pure carbon fiber, without a significant amount of residues and preserving their structural characteristics. The thermal plasma allows managing high temperatures (2,000°C to 15,000°C) in a controlled atmosphere, which allows the dissociation of long chains of molecules into ions that are recombined to produce combustible gases and other acid or alkaline gases that are easily neutralized and retained in gas cleaning systems.
摘要:
A process for the removal of poly(arylene sulfide) based deposits from an article by contacting said poly(arylene sulfide) based deposits with a polar aprotic compound, a base, an organosulfur compound having the formula: R1-S-S-R2, wherein R1 and R2 are hydrocarbon radicals having from 1 to 50 carbon atoms per radical, and optionally, a halogenated aromatic compound.
摘要:
A process for reducing black specks in anisotropic melt-phase forming liquid crystal polymer which comprises the steps of subjecting a reactor in which an anisotropic melt-forming polymer was formed to successive washes of triethylene glycol, ethylene glycol and at least one water wash, draining the reactor between washes, and drying the reactor after the water wash.
摘要:
A process for the removal of poly(arylene sulfide) based deposits from an article by contacting said poly(arylene sulfide) based deposits with a polar aprotic compound, a base, an organosulfur compound having the formula: R1-S-S-R2, wherein R1 and R2 are hydrocarbon radicals having from 1 to 50 carbon atoms per radical, and optionally, a halogenated aromatic compound.