A method for producing a multi-arm type polyethylene glycol derivative, which includes carrying out the following in order: Step (A): protecting an even number of hydroxyl groups, while leaving only the hydroxyl group at the 1-position of a polyhydric alcohol having an odd number of hydroxyl groups, other than the hydroxyl group at the 1-position by cyclic benzylidene acetalization, Step (B): linking two molecules of the compound obtained in step (A) to a compound for introducing a specific linker by etherification reaction, Step (C): deprotecting the cyclic benzylidene acetal structure at the terminal of the compound obtained in step (B), Step (D): polymerizing 3 to 600 mol of ethylene oxide to each hydroxyl group of the compound obtained in step (C) to obtain a multi-arm type polyethylene glycol derivative, and Step (E): functionalizing the hydroxyl group at the terminal of the multi-arm type polyethylene glycol derivative obtained in step (D).

A method for producing a multi-arm type polyethylene glycol derivative, which includes carrying out the following in order: Step (A): protecting an even number of hydroxyl groups, while leaving only the hydroxyl group at the 1-position of a polyhydric alcohol having an odd number of hydroxyl groups, other than the hydroxyl group at the 1-position by cyclic benzylidene acetalization, Step (B): linking two molecules of the compound obtained in step (A) to a compound for introducing a specific linker by etherification reaction, Step (C): deprotecting the cyclic benzylidene acetal structure at the terminal of the compound obtained in step (B), Step (D): polymerizing 3 to 600 mol of ethylene oxide to each hydroxyl group of the compound obtained in step (C) to obtain a multi-arm type polyethylene glycol derivative, and Step (E): functionalizing the hydroxyl group at the terminal of the multi-arm type polyethylene glycol derivative obtained in step (D).

The invention relates to polyesters of the following general formula, wherein the residues R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5a (as a special case of residue R.sup.5), R.sup.6, R.sup.7 and R.sup.8 are free of carboxy, hydroxy, thiol, imino, and primary and secondary amino groups, the residues R.sup.5b (as a special case of R.sup.5) and R.sup.9 contain hydroxyl groups, 10 to 100 mol % of which can be present in salt form analogously to polymers or otherwise capped, u=0 or 1, v=1 to 60 and w=1 to 20. The invention further relates to wetting agents and dispersants that contain the aforementioned polyesters or consist thereof and to a method for producing said wetting agents and dispersants, to the use of the polyesters and reaction products of the method according to the invention as wetting agents and dispersants, and to compositions containing the polyesters, wetting agents and/or dispersants or reaction products of the method according to the invention and particulate solids.

##STR00001##

Provided are a polymer represented by Formula 1, an electrolyte including the same, and a lithium battery including the polymer.

A method for producing polyethylene glycol having a terminal carboxyl group including oxidizing polyethylene glycol represented by formula (I): CH.sub.3O(CH.sub.2CH.sub.2O).sub.n(CH.sub.2).sub.mCHO with potassium peroxymonosulfate in water whose pH is adjusted to be from 6 to 8 with at least one selected from a carbonate, a phosphate, a citrate and an acetate at 5 to 40 C. to produce polyethylene glycol represented by formula (II): CH.sub.3O(CH.sub.2CH.sub.2O).sub.n(CH.sub.2).sub.mCOOH, wherein n is a number from 10 to 1,100, and m is 2 or 3.

A method for producing polyethylene glycol having a terminal carboxyl group including oxidizing polyethylene glycol represented by formula (I): CH.sub.3O(CH.sub.2CH.sub.2O).sub.n(CH.sub.2).sub.mCHO with potassium peroxymonosulfate in water whose pH is adjusted to be from 6 to 8 with at least one selected from a carbonate, a phosphate, a citrate and an acetate at 5 to 40 C. to produce polyethylene glycol represented by formula (II): CH.sub.3O(CH.sub.2CH.sub.2O).sub.n(CH.sub.2).sub.mCOOH, wherein n is a number from 10 to 1,100, and m is 2 or 3.

Described herein are substituted polyetheramines with a low melting point which are obtainable by condensation of at least two N-(hydroxyalkyl)amines to obtain a polyetheramine and subsequent reaction of at least one remaining hydroxy group and/or, if present, at least one secondary amino group of said polyetheramine with ethylene oxide and at least one further alkylene oxide to obtain a substituted polyetheramine. Uses of such substituted polyetheramines in fields of cosmetic formulations, as crude oil emulsion brakers, in pigment dispersions of ink jets, in electro paintings, or in cementitious compositions as well as methods wherein said substituted polyetheramines are used in said fields are described herein.

Described herein are substituted polyetheramines with a low melting point which are obtainable by condensation of at least two N-(hydroxyalkyl)amines to obtain a polyetheramine and subsequent reaction of at least one remaining hydroxy group and/or, if present, at least one secondary amino group of said polyetheramine with ethylene oxide and at least one further alkylene oxide to obtain a substituted polyetheramine. Uses of such substituted polyetheramines in fields of cosmetic formulations, as crude oil emulsion brakers, in pigment dispersions of ink jets, in electro paintings, or in cementitious compositions as well as methods wherein said substituted polyetheramines are used in said fields are described herein.

A cross-linked rubber obtained by cross-linking a polyether rubber composition containing a polyether rubber and a cross-linking agent, wherein the polyether rubber contains an epihalohydrin monomer unit and an ethylene oxide monomer unit and has a ratio of content of the ethylene oxide monomer unit of 50 to 80 mol % in a total monomer unit, and an acetone extraction amount when the cross-linked rubber is immersed in acetone at 23 C. for 72 hours is 3.5 wt % or less.

A method for producing polyethylene glycol having a terminal carboxyl group including oxidizing polyethylene glycol represented by formula (I): CH.sub.3O(CH.sub.2CH.sub.2O).sub.n(CH.sub.2).sub.mCHO with potassium peroxymonosulfate in water whose pH is adjusted to be from 6 to 8 with at least one selected from a carbonate, a phosphate, a citrate and an acetate at 5 to 40 C. to produce polyethylene glycol represented by formula (II): CH.sub.3O(CH.sub.2CH.sub.2O).sub.n(CH.sub.2).sub.mCOOH, wherein n is a number from 10 to 1,100, and m is 2 or 3.