Shin-etsu Chemical Co., Ltd.

Takata Corporation

Nissin Chemical Industry Co., Ltd.

Nissin Chemical Co., Ltd.

Hiroshi Ohashi

Masaki Tanaka

Fumio Okada

Yoshio Okamura

Nobuyuki Terae

Yoshinobu Takahashi

Toshinobu Ishihara

Takeshi Fukuda

Tohru Kubota

Satoshi Kuwata

Masanao Kamei

Kunihiro Yamada

Toshio Ohba

Hiroyasu Hara

Yasuaki Hara

Yasushi Masuda

Tsuneo Chikaraishi

Yoshihito Osawa

Morizo Nakazato

Hiroyuki Ohata

Kiyohiro Kondow

Syuichi Azechi

Koichiro Yamada

Kiyoji Suemoto

Hiroshi Saga

Hidekazu Iida

Yoshihiko Ohsawa

Tetsuo Okamoto

The invention discloses an efficient and convenient method for the preparation of an aqueous emulsion of an organopolysiloxane having long-chain alkyl groups bonded to the silicon atoms. Instead of dispersing and emulsifying an organopolysiloxane modified in advance with long-chain alkyl groups in an aqueous medium, as is the case in the prior art method, an organohydrogenpolysiloxane having silicon-bonded hydrogen atoms and a long-chain &agr;-olefin compound are co-emulsified in an aqueous medium containing a surface active agent and this aqueous emulsion is heated under agitation with addition of a catalytic platinum compound so as to effect the in situ hydrosilation reaction between the silicon-bonded hydrogen atoms in the organohydrogenpolysiloxane and the ethylenically unsaturated bonds in the &agr;-olefin compound. The aqueous emulsion prepared by the inventive method exhibits excellent stability against long-term storage, dilution with water and mechanical shearing force.

Method for preparation of aqueous emulsion of long-chain alkyl-modified silicone

Disclosed is a base fabric for automobile air bags having excellent flexibility to ensure compact folding of the air bag and high flame retardancy for safety in hazard, which consists of a woven fabric web and a rubbery coating layer formed thereon from a silicone-based coating composition in the form of an aqueous emulsion comprising: (a) 100 parts by weight of an organopolysiloxane represented by the general formula

Base fabric for air bags and method for the preparation thereof

Disclosed is a method of producing an epoxy-modified silicone, which comprises causing a reaction between (A) 100 parts of an ethylenic unsaturated group-containing epoxide and (B) from 50 to 40,000 parts of an organohydrogenpolysiloxane and/or an organohydrogensilane in the presence of (C) from 0.00001 to 0.5 part by weight, on a platinum basis, of a platinum compound as catalyst and (D) from 0.1 to 1,000 parts by weight of an aliphatic alcohol containing from 1 to 10 carbon atoms.

Method of producing epoxy-modified sulicones using aliphatic alcohol

Disclosed is a silicone-based antifoam composition capable of exhibiting high defoaming activity even at a high temperature with excellent durability so as to be useful in dyeing processes. The composition comprises, as the principal ingredient, a polyoxyalkylene-modified polydimethylsiloxane, of which, different from conventional polyoxyalkylene-modified polydimethylsiloxanes, the polyoxyalkylene groups consist of two different types relative to the molar proportion of the oxyethylene units and oxypropylene units, in addition to a silicone oil compound of a silica filler, a poly(oxyethylene-oxypropylene) copolymer and low-molecular polydimethylsiloxane terminated at each molecular chain end with a dimethyl hydroxy silyl group.

Polyoxyalkylene-modified polydimethylsiloxane antifoam compositions with

A highly stable emulsion of an organopolysiloxane suitable for use as a fabric-finishing agent is proposed which is prepared by mixing and agitating (a) an organopolysiloxane of a linear molecular structure having polyoxyalkylene groups and amino- or epoxy-substituted groups bonded to the silicon atoms, (b) a specified amount of a, preferably, non-ionic surface active agent having a specific HLB value and (c) water in an amount to form an oil-in-water type emulsion.

Method for the preparation of an aqueous emulsion of organopolysiloxane

A very effective method is proposed for the shrink-proof treatment of a fabric material of keratinous fibers, e.g., wool, in which the fabric material is first soaked with an aqueous solution of a persulfate compound followed by drying to effect surface oxidation of the fibers and then finished with a curable organopolysiloxane composition. Preferably, the curable organopolysiloxane composition comprises, as a dispersion in an aqueous medium, (A) an organopolysiloxane having hydroxyl or alkoxyl groups, (B) silica or an organopolysilsesquioxane in a finely divided form, (C) an alkoxy silane having an amido group and a carboxyl group in a molecule, (D) an alkoxy silane having an amino group or an epoxy group in a molecule, and (E) a curing catalyst, each in a specified proportion.

Method for shrink-proof treatment of fabric of keratinous fibers with

This invention discloses a fiber treatment agent characterized in that it comprises:

Fiber treatment agent

A fiber treating composition based on an organopolysiloxane of the average compositional formula:

Fiber treating compositions

Novel siloxane compounds having N-alkylpyrrolidone incorporated therein as well as a reactive group such as amino, epoxy, acryl, methacryl, carboxyl, mercapt or carbinol group in their molecule possess the characteristics of both silicone and pyrrolidone and are highly water soluble. They are prepared by polymerizing an oligomer resulting from hydrolysis of a pyrrolidone-containing silicone, a cyclic siloxane, and a siloxane or by addition reacting an N-allylpyrrolidone to an organohydrogensiloxane. They are useful as fiber treating agents and cosmetic additives, and also effective for modifying various resins.

Siloxane compounds and their preparation

An organopolysiloxane containing at least one epoxy group is produced by heating a mixture of (a) an epoxy group-containing organosiloxane; (b) an organosiloxane lacking an epoxy group and optionally containing an arkenyl group; (c) an aprotic polar organic solvent; and (d) a basic catalyst, until reaction between (a) and (b) by a disproportionation equilibration reaction occurs.

Process for the production of an organopolysiloxane

A silicone-based fabric finishing agent which comprises: an aminoalkyl-substituted diorganopolysiloxane; a reaction product of an aminoalkyl-substituted organopolysiloxane and an epoxy-containing organic compound; a hydrolysis product of an epoxy-containing hydrolyzable organosilane coupound; and, optionally, an aminoalkyl-substituted organopolysiloxane having a specified viscosity, each in a specified proportion is particularly suitable for the softening treatment of waddings of synthetic fibers, e.g., polyester fibers, and advantageous over conventional silicone-based fabric treatment agents with respect to the excellent softness and smoothness of the treated wadding, which is freed from the problem of discoloration or yellowing caused in the course of the heat treatment and by the lapse of time, as well as the durability of these effects to withstand dry cleaning.

Silicone-based fabric finishing agent

An excellently pleasant feeling of softness and elastic resilience can be imparted to a fabric material treated with the inventive fabric finishing agent which is an aqueous emulsion of a copolymer obtained by the emulsion polymerization, in an aqueous emulsion of an organopolysiloxane having radical-polymerizable groups, e.g., vinyl groups, or mercapto-substituted hydrocarbon groups, e.g., 3-mercaptopropyl groups, as the polymerization medium of an acrylic or methacrylic monomer, e.g., alkyl acrylates and methacrylates, in a specified amount relative to the amount of the organopolysiloxane. The acrylic or methacrylic monomer may be partly replaced with a polyfunctional monomer, e.g., acrylic and methacrylic acids, N-methylol acrylamide, glycidyl methacrylate, 2-hydroxyethyl methacrylate and the like, and/or a monomer of the third class, e.g., styrene and acrylonitrile. The emulsion may be further admixed with an organohydrogen polysiloxane as a crosslinking agent and a catalyst for the crosslinking reaction.

The fabric finishing agent is a solution of a graft copolymer composed of an organopolysiloxane moiety and a grafting moiety thereon obtained by the graft copolymerization of an acrylic or methacrylic monomer, optionally, in combination with monomers of other types. The fabric finishing agent is capable of imparting various kinds of fabric materials with greatly improved soft but non-sticky feeling of touch with resilient elasticity and the effect of treatment is durable and resistant against laundering and dry cleaning.

Silicone-containing fabric finishing agent

A process for preparing a self-crosslinkable aminosiloxane emulsion, comprising:

Process for preparing self-crosslinkable aminosiloxane emulsion

A fiber treatment composition comprising an aqueous dispersion containing; (A) 100 parts by weight of a finely particulate epoxy group-containing organosilasesquioxane substantially represented by general unit formula (I):

Growing community of inventors

Gunma, Japan

Hiroshi Ohashi