摘要:
In manufacturing of a carboxyl group-containing water-soluble polymer by a precipitation polymerization method, a method which can improve production efficiency with increasing practicality continuously adds a monomer solution wherein a monomer component containing an α, β-unsaturated carboxylic acid is dissolved in an inert solvent in a concentration of 20 to 50% by volume to an inert solvent charged in a reaction vessel. In this case, the amount of the inert solvent charged in the reaction vessel is set so that the concentration of the monomer component in the total amount summed up with the monomer solution is 10 to 24% by volume, and the time period until completion of continuous addition of the total amount of the monomer solution is set so that the conversion of the monomer component at the time of completion of addition of the total amount of the monomer solution is 60% or more. The monomer component may contain a polymerizable compound having two or more ethylenically unsaturated groups.
摘要:
The present invention provides a water-soluble acrylate polymer that makes it possible to obtain a gelling base having a gel strength recited below when the gelling base comprises the components and the proportions thereof listed below; when the gelling base is gelated by being allowed to stand under the conditions of 25°C and a relative humidity of 60%, the resulting gel has a gel strength of 5,000 to 9,000 dyn/cm 2 after standing for 7.5 hours and a gel strength of 10,000 to 15,000 dyn/cm 2 after standing for 200 hours; the gelling base comprising: 4 parts by mass of glycerol, 4 parts by mass of propylene glycol, 5 parts by mass of a water-soluble acrylate polymer, 0.2 parts by mass of a dried aluminum hydroxide gel exhibiting acid reactivity with 0.1 N-HCl of 180 seconds, 0.25 parts by mass of tartaric acid, and 86.55 parts by mass of distilled water.
摘要翻译:本发明提供一种水溶性丙烯酸酯聚合物,当胶凝基质包含下列成分及其比例时,可以获得具有下述凝胶强度的胶凝基料: 通过在25℃,相对湿度60%的条件下凝胶化凝胶化凝胶时,所得凝胶在静置7.5小时后的凝胶强度为5000〜9000dyn / cm 2,凝胶强度 放置200小时后为10,000至15,000dyn / cm 2; 该胶凝基体包括:4质量份甘油,4质量份丙二醇,5质量份水溶性丙烯酸酯聚合物,0.2质量份与0.1N-HCl显示酸反应性的干燥氢氧化铝凝胶 180秒,酒石酸0.25质量份,蒸馏水86.55质量份。
摘要:
An object of the present invention is to provide a water-soluble acrylate polymer that can form a gelling base. When used in forming a poultice or cooling sheet, the gelling base not only imparts desirable stretchability, but also has an appropriate reaction rate with a polyvalent metal. The gelling base is free from gel penetration to the back side of a support or gel seeping from the support while the gel is being cured, and is easily applied to the support. When the gelling base is gelated by being allowed to stand under the conditions of 25°C and a relative humidity of 60%, the gel strength is 3,200 to 7,000 dyn/cm 2 after standing for 7.5 hours and 5,000 to 9,000 dyn/cm 2 after standing for 200 hours, and satisfies the following relationship: Gel strength after standing for 7.5 hours] ≤ Gel strength after standing for 200 hours.
摘要翻译:本发明的目的是提供可形成胶凝基质的水溶性丙烯酸酯聚合物。 当用于形成泥敷剂或冷却片时,胶凝基质不仅赋予理想的可拉伸性,而且还具有与多价金属的适当反应速率。 当凝胶被固化时,胶凝基底不会从支撑物的背面渗透凝胶或从支撑物渗出的凝胶,并且容易施加到支撑物上。 在25℃,相对湿度60%的条件下使凝胶化基凝胶化时,静置7.5小时后的凝胶强度为3,200〜7,000dyn / cm 2,静置后凝胶强度为5,000〜9,000dyn / cm 2 持续200小时,并满足以下关系:静置7.5小时后的凝胶强度]≤静置200小时后的凝胶强度。
摘要:
A (meth)acrylic acid/alkyl (meth)acrylate ester copolymer containing constituents of 95.42 to 97.48% by mass of (meth)acrylic acid, 2.43 to 4.30% by mass of an alkyl (meth)acrylate ester of which alkyl group has 18 to 24 carbon atoms, and 0.08 to 0.30% by mass of a compound having two or more ethylenically unsaturated groups; and cosmetics blended with the copolymer. According to the copolymer of the present invention, a neutral viscous aqueous solution having a high viscosity can be formed even in the presence of an electrolyte in a relatively high concentration, without being affected by its temperature and electrolytic concentration; therefore, the copolymer of the present invention can be suitably used in cosmetics and the like.
摘要:
An object of the invention is to provide a method for easily producing granular carboxyl group-containing polymer particles which have a high bulk density and readily swell in water. The invention provides a method for producing a granular carboxyl group-containing polymer particle which comprises producing a carboxyl group-containing polymer particle, preparing an aggregate of the carboxyl group-containing polymer particles by causing the carboxyl group-containing particles to absorb moisture to a moisture content of 5 to 25% by weight and drying the aggregate of the carboxyl group-containing polymer particles and then grinding the dried aggregate.
摘要:
Disclosed is a water-soluble copolymer having an alkyl-modified carboxyl group, which can form a viscous nutralizing solution having a satisfactorily high viscosity, an extremely high transmittance, no greasy feeling and a fresh texture even in the presence of a relatively high concentration of an electrolyte. Also disclosed is a thickening agent comprising the water-soluble copolymer. The water-soluble copolymer can be produced by polymerization of 100 parts by weight of (meth)acrylic acid, 5 to 10 parts by weight of lauryl (meth)acrylate and 0 to 0.1 part by weight of a compound having two or more ethylenically unsaturated groups. The water-soluble copolymer shows a viscosity of 1000 mPa·s or lower and a transmittance of 95% or higher when prepared into a viscous neutralizing solution containing 1% by weight of the water-soluble copolymer, and shows a maximum viscosity of 10000 to 30000 mPa·s and a transmittance of 95% or higher when 1 to 7 parts by weight of sodium chloride is added to 100 parts by weight of the viscous neutralizing solution.
摘要:
The present invention has its object to provide a gelling agent for a battery, which forms a paste gel in a short period of time on dissolution in an alkaline electrolyte. The gel has less bubbles and a high gel density. The present invention is a gelling agent for a battery, which comprises granular carboxyl group-containing polymer particles having a median particle diameter of 100 to 800 µm and a bulk density of 0.30 g/ml or more, and has a gel turbidity of 200 ppm or less and a gel density of 1.37 g/ml or more in a gel, the gel being prepared by adding 2 parts by mass of the granular carboxyl group-containing polymer particles to 98 parts by mass of 40% by mass of an aqueous potassium hydroxide solution.
摘要:
An object of the present invention is to provide a method for easily producing granular carboxyl group-containing polymer particles which have a high bulk density and readily swell in water. The present invention provides a method for producing granular carboxyl group-containing polymer particles, which includes: producing carboxyl group-containing polymer particles; preparing an aggregate of the carboxyl group-containing polymer particles by allowing the carboxyl group-containing polymer particles to absorb an polar organic solvent to a liquid content of 5 to 25% by mass; and drying the aggregate of the carboxyl group-containing polymer particles and then grinding the dried aggregate.