Abstract:
PURPOSE: A composition for removing advertising stickers and labels is provided, to allow the stickers and labels to be removed cleanly and easily by weakening the adhesive strength between the stickers or labels and a board or a wall. CONSTITUTION: The composition comprises 5-22 wt% of an adhesive rigid resin which has a glass transition temperature of 40-130 deg.C and is soluble in the used solvent; and 78-95 wt% of a mixture of a high boiling point organic solvent and a low boiling point organic solvent whose boiling points are different each other. Preferably the adhesive rigid resin is polystyrene, poly(styrene-co-maleic anhydride), polyacrylonitrile, poly(styrene-co-acrylonitrile), poly(vinyl chloride-co-vinyl acetate), carboxyl group-containing poly(vinyl chloride-co-vinyl acetate), poly(methyl acrylate-co-ethyl acrylate), carboxyl group-containing poly(methyl acrylate-co-ethyl acrylate), poly(methyl methacrylate-co-vinyl acetate), or carboxyl group-containing poly(methyl methacrylate-co-vinyl acetate). Preferably the solvent mixture comprises 20-90 wt% of a high boiling point organic solvent and 10-80 wt% of a low boiling point organic solvent.
Abstract:
PURPOSE: A composition for the adhesion of cellulose, a method for preparing a medical cotton pad and a medical cotton pad prepared by the method are provided, to improve the water and blood absorptive power by maximizing the crosslinking efficiency. CONSTITUTION: The composition comprises 0.5-1.5 wt% of a poly(acrylic acid)-based resin; 0.4-0.9 wt% of liquid ammonia (28%); 0.01-0.06 wt% of chitosan; 0.6-1.7 wt% of acetic acid; and water. Preferably the poly(acrylic acid)-based resin is a poly(acrylic acid-co-maleic anhydride) copolymer. The method comprises the steps of soaking 1 parts by weight of cotton into 3-8 parts by weight of the composition; placing the soaked cellulose cotton on a polished stainless plate and compressing the cotton by using a rubber roller with a pressure of 0.5-2 kgf/cm¬2 3-10 times for 3-40 sec; and drying it with a hot wind of 40-80 deg.C for 0.5-6 hours.
Abstract:
PURPOSE: A composition for the adhesion of cellulose, a method for preparing a medical cotton pad and a medical cotton pad prepared by the method are provided, to improve the water and blood absorptive power by maximizing the crosslinking efficiency. CONSTITUTION: The composition comprises 0.5-1.5 wt% of a poly(acrylic acid)-based resin; 0.4-0.9 wt% of liquid ammonia (28%); 0.01-0.06 wt% of chitosan; 0.6-1.7 wt% of acetic acid; and water. Preferably the poly(acrylic acid)-based resin is a poly(acrylic acid-co-maleic anhydride) copolymer. The method comprises the steps of soaking 1 parts by weight of cotton into 3-8 parts by weight of the composition; placing the soaked cellulose cotton on a polished stainless plate and compressing the cotton by using a rubber roller with a pressure of 0.5-2 kgf/cm¬2 3-10 times for 3-40 sec; and drying it with a hot wind of 40-80 deg.C for 0.5-6 hours.
Abstract:
PURPOSE: A chelate resin for adsorbing a specific heavy metal ion and its preparation method are provided, to improve the adsorption property by increasing the hydrophilicity and adding unshared electron pairs to the structure. CONSTITUTION: The chelate resin comprises a side chain of a spherical polystyrene copolymer, where the side chain is a phenyl ring has an acetic acid group adjoining linearly to a sulfone amide structure chain as a functional group, and is represented by the formula 1, wherein A is H, Na or K. The method comprises the steps of reacting a spherical polystyrene copolymer which is prepared by the suspension copolymerization of styrene using divinyl benzene as a crosslinking agent, with chlorosulfonic acid to prepare a chlorosulfonated copolymer resin; and reacting the obtained chlorosulfonated copolymer resin with iminodiacetic acid.
Abstract:
PURPOSE: A chelate resin for adsorbing specific heavy metal ions and its preparation method are provided, to improve the adsorbing property to specific heavy metal ions by introducing a sulfonyl dithiocarbamic acid group into the phenyl ring of a spherical polystyrene as a chelate functional group and thereby improving the hydrophilicity and the coordinating property. CONSTITUTION: The chelate resin is represented by the formula 1, wherein A is H, K or Na. The method comprises the steps of preparing a spherical polystyrene by suspension polymerization of styrene using a divinylbenzene as a crosslinking agent, and reacting the spherical polystyrene with chlorosulfonic acid to obtain the chlorosulfonated copolymer represented by the formula 2; aminating the copolymer of the formula 2 by using liquid ammonia to prepare the sulfonamide group-containing copolymer represented by the formula 3; and reacting the copolymer of the formula 3 with carbon disulfide to introduce a dithiocarboxylic group into the copolymer and neutralizing the obtained one.
Abstract:
PURPOSE: A chelate resin for adsorbing a specific heavy metal ion and its preparation method are provided, to improve the adsorption property by increasing the hydrophilicity and adding unshared electron pairs to the structure. CONSTITUTION: The chelate resin comprises a side chain of a spherical polystyrene copolymer, where the side chain is a phenyl ring has an acetic acid group adjoining linearly to a sulfone amide structure chain as a functional group, and is represented by the formula 1, wherein A is H, Na or K. The method comprises the steps of reacting a spherical polystyrene copolymer which is prepared by the suspension copolymerization of styrene using divinyl benzene as a crosslinking agent, with chlorosulfonic acid to prepare a chlorosulfonated copolymer resin; and reacting the obtained chlorosulfonated copolymer resin with iminodiacetic acid.
Abstract:
본 발명은 중금속이온 흡착용 티올기 함유 슬폰산계 킬레이트 수지에 관한 것으로, 더욱 상세하게는 스티렌과 메틸메타크릴레이트를 단량체로 사용하고 디비닐벤젠을 가교제로 사용하여 중합된 구상(球狀)의 공중합체를 골격구조로 하고, 골격구조에서 볼 때 측쇄 길이가 긴 스티렌과 측쇄 길이가 짧은 메틸메타크릴레이트의 단위구조 각각에 슬폰산기와 티올기를 관능기로 배치시켜 이종(異種) 관능기 간의 간섭을 최소화하고 관능기 간의 킬레이트 능력이 개선되도록 일정 공간을 확보해 줌으로써, 슬폰산기에 대해 낮은 흡착능을 보이는 Hg 2+ 이온에 대한 흡착능을 보완하고, 기존에 우수한 흡착능을 보인 특정의 중금속이온들에 대해서도 킬레이트 형성능력을 보다 개선하는 티올기 함유 슬폰산계 킬레이트 수지에 관한 것이다. 티올 관능기, 슬폰산 관능기, 킬레이트 수지, 중금속이온 흡착능
Abstract:
본 발명은 특정 중금속이온 흡착용 술폰산기 함유 킬레이트 수지에 관한 것으로서, 더욱 상세하게는 구상(球狀)의 폴리스티렌 공중합체의 페닐 측쇄에는 N-메틸술폰아미드 결합구조의 공간자(spacer)가 도입되어 있고, 연이어서 술폰산기가 킬레이트 관능기로 도입되어 있어 보다 친수성을 강화시킨 구조를 이루고 있고, 술폰산 관능기 주위에는 산소 또는 질소 원자의 비공유 전자쌍들을 한층 풍부하게 해줌으로써 특정 중금속이온들에 대한 흡착특성이 우수한 특정 중금속이온 흡착용 술폰산기 함유 킬레이트 수지에 관한 것이다.
Abstract:
PURPOSE: Provided is a phosphorylated poly(styrene-co-divinylbenzene)-based chelate resin which is excellent in chelate adsorption power to a certain heavy metal ion, and a preparing method thereof. CONSTITUTION: The phosphorylated poly(styrene-co-divinylbenzene)-based chelate resin is represented by the formula 1, wherein a spacer of an ethylene benzyl sulfone linkage structure is introduced onto a phenyl ring, and successively, a phosphono functional group is introduced thereonto, and is prepared by the method comprising the steps of: reacting a phenyl ring in a spherical copolymer resin of styrene and divinylbenzene, with chloromethyl, followed by thiolating with thiourea/aqueous alkali solution to prepare a thiol group-containing copolymer resin of the formula 2; reacting the obtained copolymer resin with chloroethanol to convert into a hydroxyethyl benzyl thioether group, followed by chlorination to prepare a chloroethyl benzyl thioether linkage structure-containing copolymer resin of the formula 3; and reacting the obtained copolymer resin with triethylphosphite/aqueous alkali solution. In the formula 1-3, A represents a hydrogen atom or an alkali metal atom.
Abstract:
PURPOSE: A composition for removing a poster is provided, to improve the film strength of a paper poster and the permeation of the composition, thereby allowing the poster to be removed cleanly and easily. CONSTITUTION: The composition comprises 3-20 wt% of an aqueous polymer bonded with carboxyl groups or amide groups; 1-15 wt% of a paper penetrating agent selected from silicates, phosphates, caustic soda and acetic acid solution; 0.5-30 wt% of a permeation adjuvant selected from an alcohol and a surfactant; and 35-95.5 wt% of water. Preferably the aqueous polymer is a copolymer of dicarboxylic acid-based monomers selected from maleic anhydride, succinic acid, fumaric acid and itaconic acid, and acrylic acid, methacrylic acid or acrylamide; and the surfactant is a nonionic surfactant whose HLB (hydrophilic lipophilic balance) value is 9-18.