A non-aqueous liquid electrolyte for a secondary battery, containing: a compound represented by formula (I); an electrolyte; and an organic solvent, in which the non-aqueous liquid electrolyte has a viscosity of 20 mPa.Math.s at 25 C. or less, ##STR00001## wherein Ra, Re and Rf each represent an organic group, and Re and Rf may be bonded with each other to form a ring; Xa represents a substituent represented by formula (a) or (b); Rb and Rc each represent a hydrogen atom or a substituent; and Rd represents a hydrogen atom or an organic group.

A method for synthesising polyepichlorohydrin includes: a) reacting epichlorohydrin with boron trifluoroetherate in the presence of a solvent; b) adding epichlorohydrin to the reaction product obtained in step a); c) hydrolysing the product obtained in step b).

The present invention relates to a polymer including repeating units of the following general formula (1): ##STR00001##
wherein R.sub.1, R.sub.2, m, k and the asterisks are as defined in the specification and the claims, and wherein the bromine content in the polymer being 45 to 80 wt %, as well as to a method for producing such polymers.

A method of producing a polyether polyol includes reacting a low molecular weight initiator with one or more monomers in the presence of a polymerization catalyst, and the low molecular weight initiator has a nominal hydroxyl functionality of at least 2. The one or more monomers includes at least one selected from propylene oxide and butylene oxide. The polymerization catalyst is a Lewis acid catalyst having the general formula M(R.sup.1)1(R.sup.2)1(R.sup.3)1(R.sup.4)0 or 1, whereas M is boron, aluminum, indium, bismuth or erbium, R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each independent, R.sup.1 includes a fluoroalkyl-substituted phenyl group, R.sup.2 incudes a fluoroalkyl-substituted phenyl group or a fluoro/chloro-substituted phenyl group, R.sup.3 includes a fluoroalkyl-substituted phenyl group or a fluoro/chloro-substituted phenyl group, and optional R.sup.4 includes a functional group or functional polymer group, R.sup.1 being different from at least one of R.sup.2 and R.sup.3.

A polyoxyalkylene polymer including a main chain structure of a polyoxyalkylene and terminal structures bonded to ends of the main chain structure is provided. The terminal structures include a hydrolyzable silyl group and further include a terminal olefin group and/or an internal olefin group. The total number of the hydrolyzable silyl, terminal olefin, and internal olefin groups is more than 1.0 on average per terminal structure, and the ratio of the number of moles of the hydrolyzable silyl groups to the total number of moles of the hydrolyzable silyl, terminal olefin, and internal olefin groups is from 0.3 to 0.7.

In nonionic surfactants that contain blocks of hydrophobic poly(alkylene oxide) polymer linked to blocks of hydrophilic poly(alkylene oxide) polymer, the biodegradability of the polymer is improved if the hydrophobic blocks are polymerized in the presence of carbon dioxide to add poly (alkylene carbonate) units into the hydrophobic block, in which the alkylene carbonate units make up from 1 to 40 weight percent of the hydrophobic polymer blocks. The resulting nonionic surfactants can have similar surfactant performance but improved biodegradability, as compared to related surfactants without alkylene carbonate units.

Alkylene oxides are polymerized in the presence of a catalyst system that includes a double metal cyanide catalyst. At least one additive is present. The additive is an alkali metal, ammonium or quaternary ammonium salt of a monocarboxylic acid having up to 24 carbon atoms; monobasic potassium phosphate, a monobasic ammonium or quaternary ammonium phosphate, a dibasic ammonium and quaternary ammonium phosphate or phosphoric acid.

The present invention relates to a polymer including repeating units of the following general formula (1):

##STR00001##

wherein R.sub.1, R.sub.2, m, k and the asterisks are as defined in the specification and the claims, and wherein the bromine content in the polymer being 45 to 80 wt %, as well as to a method for producing such polymers.

A method for synthesising polyepichlorohydrin including: a) reacting epichlorohydrin with boron trifluoroetherate in the presence of a polymerisation initiator; b) adding a good solvent for epichlorohydrin to the reaction product obtained in step a); c) adding epichlorohydrin to the reaction product obtained in step b).

A viologen-based ionic polymer binder, and a preparation method and use thereof are provided, belonging to the technical field of lithium-ion batteries. The viologen-based ionic polymer binder is a polymer prepared from polymerization of a viologen-based acrylate, at least one of an acrylate and poly(ethylene glycol) methyl ether acrylate. When the viologen-based ionic polymer binder is used to prepare a cathode of a lithium-ion battery, a chain segment of the viologen-based polyacrylate could enhance bonding between cathode active materials, promote transportation of lithium ions, and thereby could improve capacity retention and recycling stability of the battery.