Viscous composition
A viscous composition and composition technology, applied in the direction of cosmetics, coatings, cosmetics, etc., can solve the problems of additive types limitation, viscosity reduction, etc., and achieve the effect of excellent use feeling, smooth and tender use feeling
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preparation example Construction
[0072] The viscous composition of the present invention is prepared by using a liquid composition (may simply be referred to as "liquid composition") containing an alkyl-modified carboxyl group-containing water-soluble copolymer, a polyvalent metal salt, and water.
[0073] The content of the alkyl-modified carboxyl group-containing water-soluble copolymer in the above-mentioned liquid composition may be appropriately set according to the viscosity required for the viscous composition of the present invention, and is usually preferably 100 parts by mass of water. 0.1 to 4 parts by mass, more preferably 0.1 to 3 parts by mass, most preferably 0.2 to 2 parts by mass. When such a range is satisfied, the viscous composition of the present invention can have a better feeling of use when applied to the skin.
[0074] In addition, the content of the polyvalent metal salt in the liquid composition may be appropriately set according to the viscosity required for the viscous composition...
Embodiment
[0111] The present invention will be described in detail below by Examples and Comparative Examples, but the present invention is not limited to these Examples.
[0112] 1. Preparation and Evaluation of Viscous Composition
[0113] [test methods]
[0114] Regarding the viscous compositions obtained in Examples and Comparative Examples, sensory tests for viscosity and texture were evaluated by the following methods.
[0115] (1) Viscosity
[0116] For each evaluation sample, by using a BH-type rotational viscometer (manufactured by Shibaura System Co., Ltd., a single cylinder type rotational viscometer (Vismetron), model: VS-11H), at a rotational speed of 20 revolutions per minute, the rotation was started for 1 Viscosity was measured at 25° C. after 1 minute. Measuring rotor, when it is less than 2,000mPa·s, it is the No. 3 rotor, when it is more than 2,000mPa·s and less than 5,000mPa·s, it is the No. 4 rotor, when it is more than 5,000mPa·s and less than 15,000mPa·s No....
manufacture example 1
[0125] Into a 500 ml four-neck flask equipped with a stirrer, a thermometer, a nitrogen inlet tube, and a cooling tube, add 45 g (0.625 moles) of acrylic acid and an alkyl (meth)acrylate BLEMMER with an alkyl group having 18 to 24 carbon atoms. VMA70 (manufactured by NOF Corporation: 10-20 parts by mass of stearyl methacrylate, 10-20 parts by mass of eicosyl methacrylate, 59-80 parts by mass of behenyl methacrylate and 1 part by mass or less of tetracosyl methacrylate) 0.45 g, 150 g of n-hexane, and 0.081 g (0.00035 mol) of dimethyl 2,2'-azobisisobutyrate. Next, after uniform stirring and mixing, nitrogen gas was blown into the solvent to remove oxygen present in the space above the reaction vessel, the raw materials, and the solvent. Next, in a nitrogen atmosphere, the temperature was maintained at 60 to 65° C. and reacted for 4 hours. After the reaction, the resulting slurry was heated to 90°C to remove n-hexane, and then placed at 110°C and 10 mmHg for 8 hours in vacuum to...
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Abstract
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