Abstract:
A process for preparing pentabromobenzyl acrylate through the reaction of pentahalobenzyl halide with a salt of acrylic acid in a water-immiscible solvent, wherein said salt is in aqueous form and the reaction is carried out in the presence of a phase transfer catalyst. A process for polymerizing the pentabromobenzyl acrylate in halogenated aromatic solvent and the poly(pentabromobenzyl acrylate) obtained are also disclosed.
Abstract:
The invention provides pentabromobenzyl moiety containing hydroxy-functional compounds which are useful as flame-retardants in flexible and rigid polyurethane foams and also in rigid polyisocyanurate foams. Processes for preparing the compounds, polyurethane and polyisocyanurate foams containing the compounds are also provided by the invention.
Abstract:
Poly (pentabromobenzyl acrylate) having a weight average molecular weight (Mw) in the range from 200,000 to 600,000 and a polydispersity index less than 15 based on high temperature gel permeation chromatography.
Abstract:
The invention relates to the use of at least one 1-alkyl-3-alkyl-pyridinium halide, in particular 1-alkyl-3-methyl-pyridinium bromide, as an additive in bromine-generating electrochemical cells, such as zinc/bromine cells. Processes for preparing 1-alkyl-3-methyl-pyridinium bromide and concentrated aqueous solutions comprising same for use as additives in the aforementioned cells, are also disclosed.
Abstract:
The invention relates to compounds of the formula Ar(—CH2C6Br5)y, wherein Ar indicates a structure comprising one or more six-membered aromatic ring(s) and —CH2C6Br5 indicates a pentabromobenzyl group, characterized in that at least one carbon atom of said six-membered aromatic ring(s) is bonded to the benzylic carbon of said —CH2C6Br5 group, wherein y, which indicates the number of the —CH2C6Br5 groups in said compound, is not less than 1. Processes for preparing the compounds and their use as flame retardants are also disclosed.
Abstract translation:本发明涉及式Ar(-CH 2 C 6 Br 5)y的化合物,其中Ar表示包括一个或多个六元芳环的结构,而-CH 2 C 6 Br 5表示五溴苄基,其特征在于所述化合物的至少一个碳原子 六元芳环与所述-CH 2 C 6 Br 5基团的苄碳键合,其中y表示所述化合物中-CH 2 C 6 Br 5基团的数目不小于1.制备化合物及其用途的方法 作为阻燃剂也被公开。
Abstract:
A process for preparing pentabromobenzyl acrylate through the reaction of pentahalobenzyl halide with a salt of acrylic acid in a water-immiscible solvent, wherein said salt is in aqueous form and the reaction is carried out in the presence of a phase transfer catalyst. A process for polymerizing the pentabromobenzyl acrylate in halogenated aromatic solvent and the poly(pentabromobenzyl acrylate) obtained are also disclosed.
Abstract:
An aqueous biocidal composition comprising a mixture of hydrochloric acid (HCl), urea, and sodium hypochlorite (NaOCl) at acidic pH, a method for manufacturing the composition and a biocidal technology for treating industrial water.
Abstract:
This invention provides a one-stage process for generating a biocidal solution in situ, including a reaction between an ammonium salt and an electrolytically generated bromine oxidative species.
Abstract:
A process for preparing an aqueous solution of N-ethyl-2-methylpyridinium bromide (2-MEPy), comprising reacting 2-picoline and ethyl bromide in a pressure reactor at a temperature above the melting point of the reaction mixture, combining the reaction product with water, wherein said reaction product consists essentially of 2-MEPy in a liquid form, and recovering an aqueous solution of 2-MEPy.
Abstract:
The invention provides a process for preparing bronopol, which process comprises charging a reaction vessel with water, bromopicrin, nitromethane and paraformaldehyde, gradually feeding a base into said reaction vessel under stirring, bringing the reaction to completion and separating bronopol from the aqueous reaction mixture.