Taisei Chemical Industries, Ltd.

Mitsuo Tamazawa

Yasuo Kuroda

Takashi Sunamori

Masahiro Sekine

Nobuyuki Urushibara

A liquid non-aqueous dispersion comprising a silicone oil and a copolymer dispersed therein, the copolymer comprising (A) at least one radical polymerizable macromonomer containing dimethyl polysiloxane, and (B) at least one radical copolymerizable monomer with the macromonomer (A), which comprises at least one (meth)acrylate monomer and optionally at least one vinyl monomer. This liquid non-aqueous dispersion has excellent water resistance, oil resistance and adhesive properties, and when used as a component of cosmetics, it can meet both requirements for long lasting make-up and good feeling of use of cosmetics.

Liquid non-aqueous dispersion and process for producing the same

A liquid non-aqueous dispersion including a silicone oil and a copolymer dispersed therein, the copolymer including (A) at least one radical polymerizable macromonomer containing dimethyl polysiloxane, and (B) at least one radical copolymerizable monomer with the macromonomer (A), which includes at least one (meth)acrylate monomer and optionally at least one vinyl monomer. This liquid non-aqueous dispersion has excellent water resistance, oil resistance and adhesive properties, and when used as a component of cosmetics, it can meet both requirements for long lasting make-up and good feeling of use of cosmetics.

A process for producing a cationic emulsion stable to alkalis having an average particle diameter of 0.01 to 0.1 micron, in which, using as an emulsifier, a water-soluble polymer A obtained by subjecting a polymer A obtained by copolymerizing an amino group-containing compound with a compound copolymerizable therewith in the presence of a polymerization initiator, to neutralization with an organic or inorganic acid, a specific epoxy group-containing acrylate compound (c) and a compound copolymerizable therewith are subjected in combination to emulsion polymerization in the presence of a redox catalyst system in water as a medium to obtain an emulsion D; the emulsion D is then reacted with epichlorohydrin. The cationic emulsion is coated on paper, a film, or a strongly alkaline substrate to impart water resistance.

Process for producing cationic emulsion

Disclosed is a method for producing an aqueous nail enamel composition comprising the following procedure: an aqueous mixture which comprises, as essential components, water and a pigment of 3 &mgr;m or less in average particle size at a concentration of the pigment of 60% or less and is previously subjected to contact treatment with a substance having an ion exchangeability is kneaded under heating with a polyester polymer having a chemical structure containing a phenyl group and having a weight-average molecular weight of 2000-20000 and a softening point of 120&deg; C. or lower in the state of the polymer being molten and simultaneously the volatile matter contained is removed under reduced pressure; the resulting mixture (A) comprising the polyester polymer and the pigment dispersed in the polyester polymer, said pigment finally having the inherent average particle size, is dissolved in an organic solvent at a concentration of the mixture (A) of 50% by weight or less; then the solution is mixed with an organic solvent solution (B) containing 80% or less of a resin containing 1-5 meq/g of a functional group capable of being dissociated to a cation or an anion; then the resulting mixture is neutralized and allowed to contact with a substance having ion exchangeability before and/or after carrying out phase inversion by dilution with addition of water to remove ionic impurities; the organic solvent is distilled off; and the residue is again allowed to contact with a substance having ion exchangeability to obtain an aqueous nail enamel composition comprising a color polymer composition dissolved in water alone as an essential component and containing less ionic impurities and substantially no organic solvent and film-forming aid. Thus, there is provided an aqueous nail enamel compositions which contains no organic solvent, is excellent in safety for human body and long-term storage stability, and has beautiful color and gloss, and high-coating film strength and adhesion.

Method for producing aqueous nail enamel composition

Provided is a method for producing an amphoteric resin which comprises reacting (1) a copolymerizable basic prepolymer A,which is obtained by reacting a prepolymer A,being obtained by polymerization of an amino group-containing &agr;, &bgr;-ethylenically polymerizable compound, other &agr;, &bgr;-ethylenically polymerizable compound and a polymerization initiator containing a carboxyl group at an end, with a compound having an epoxy group represented by the following formula (I):

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Matsudo, Japan

Mitsuo Tamazawa