Nof Corporation

Chuo Yuka Co., Ltd.

Akinori Itoh

Yoshihiro Hayashi

Susumu Honda

Tatsuya Matsui

Hiroshi Mori

Daijiro Shiino

Hidefumi Tochigi

Kosuke Tsuda

Masaaki Kume

The invention provides a frost-preventive composition which strongly defrosts and melts ice and which prevents frosting for a long period of time and which does not run or sag when applied to a wall surface or the like. The frost-preventive greasy composition of the invention contains (a) at least one species selected from among glycols, glycol ethers, polyalkylene glycols, polyalkylene glycol derivatives, glycerin, and glycerin derivatives, (b) at least one species selected from among soaps, urea compounds, silica gel microparticles, lecithin, and polysaccharides, (c) at least one metal salt selected from among carboxylic acid metal salts, nitric acid metal salts, phosphoric acid metal salts, metal chlorides, and metal bromides, and (d) at least one species selected from among sorbitan fatty acid esters, polyoxyalkylene sorbitan fatty acid esters, polyoxyalkylene alkyl ethers, castor oil, hydrogenated castor oil, polyoxyalkylene castor oils, and polyoxyalkylene hydrogenated castor oils, in specified proportions, respectively.

Frost-preventive composition

A polymerizable polyoxyalkylene monoalkyl ether derivative prepared by using a polyoxyalklene monoalkyl ether which gives, in gel permeation chromatography, a chromatogram which satisfies a relation expressed by an equation: S/S&#x2266;0.15, wherein Srepresents the area under a portion of the chromatogram from the start of elution to the earliest elution time when the intensity of the refractive index has a value of L/3, L representing the shortest distance between the greatest maximum point of the intensity of the refractive index and the base line and Srepresents the area under a portion of the chromatogram from the start of elution to an elution time when the intensity of the refractive index has the greatest maximum value; a process for producing the above ether comprising adjusting the content of water in a reactor, which is used in addition polymerization of alkylene oxides with addition to a monohydric alcohol, so as to satisfy an equation: Wi&#xd7;(Cf&#x2212;Ci)/V&#x2266;10, wherein the content of water in the reactor is obtained by placing a solvent having a content of water Ci (ppm) in an amount Wi (g) in the reactor having an inner volume V (ml), stirring the solvent to clean the reactor, removing the solvent from the reactor and obtaining a content of water Cf (ppm) in the removed solvent.

Polyoxyalkylene monoalkyl ether, process for producing the same, polymerizable polyoxyalkylene monoalkyl ether derivative, polymer of said derivative and dispersant comprising said polymer

A polyoxyalkylene monoalkyl ether which gives, in gel permeation chromatography, a chromatogram which satisfies a relation expressed by an equation: S /S &lE;0.15, wherein S represents the area under a portion of the chromatogram from the start of elution to the earliest elution time when the intensity of the refractive index has a value of L/3, L representing the shortest distance between the greatest maximum point of the intensity of the refractive index and the base line and S represents the area under a portion of the chromatogram from the start of elution to an elution time when the intensity of the refractive index has the greatest maximum value; a process for producing the above ether includes adjusting the content of water in a reactor, which is used in addition polymerization of alkylene oxides with addition to a monohydric alcohol, so as to satisfy an equation: Wi&times;(Cf&minus;Ci)V&lE;10, wherein the content of water in the reactor is obtained by placing a solvent having a content of water Ci (ppm) in an amount Wi (g) in the reactor having an inner volume V (ml), stirring the solvent to clean the reactor, removing the solvent from the reactor and obtaining a content of water Cf (ppm) in the removed solvent; a polymerizable derivative of the above ether; a polymer of this derivative, and a dispersant including this polymer.

Polyoxyalkylene monoalkyl ether, process for producing the same, polymerizable polyoxyalkylene monoalky ether derivative, polymer of said derivative and dispersant comprising said polymer

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Kawasaki, Japan

Akinori Itoh