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    • 5. 发明授权
    • Method for treating fouled water
    • 污水处理方法
    • US3951791A
    • 1976-04-20
    • US395151
    • 1973-09-07
    • Ching Yun HuangNaomitsu TakashinaToshiaki Nishimura
    • Ching Yun HuangNaomitsu TakashinaToshiaki Nishimura
    • B01D21/01C02F1/54C08F2/28C08F8/00C08F20/00C08F20/34C02B1/20
    • C02F1/54
    • An aqueous dispersion of a polymer having a cationic charge on the surface of the polymer particles is used for treatment of fouled water. Said aqueous dispersion contains quaternary ammonium salt or inorganic or organic acid salt of a copolymer obtained by emulsion polymerization of, in the presence of a cationic surfactant, (a) 0.1 - 8.0% by weight based on total monomers of at least one .alpha.,.beta.-ethylenically unsaturated monomers containing basic nitrogen or at least one .alpha.,.beta.-ethylenically unsaturated monomers containing halogen and other (b) .alpha.,.beta.-ethylenically unsaturated monomers and/or (c) conjugate diene monomers, (b) and (c) being copolymerizable with said monomer (a). Said aqueous cationic dispersion is especially effective for treatment of fouled water containing anionic latexes.
    • 在聚合物颗粒表面上具有阳离子电荷的聚合物的水分散体用于处理污水。 所述水分散体含有季铵盐或通过在阳离子表面活性剂存在下通过乳液聚合获得的共聚物的无机或有机酸盐,(a)基于至少一种α,β的总单体为0.1-8.0% 含有碱性氮或至少一种含有卤素和其它(b)α​​,β-烯属不饱和单体和/或(c)共轭二烯单体的α,β-烯属不饱和单体的烯属不饱和单体,(b)和(c) 可与所述单体(a)共聚。 所述阳离子水性分散体对于处理含阴离子胶乳的污水特别有效。
    • 6. 发明授权
    • Highly reactive aromatic hydrocarbon-formaldehyde resin and process for
preparing the same
    • 高反应性芳烃 - 甲醛树脂及其制备方法
    • US4689392A
    • 1987-08-25
    • US844437
    • 1986-03-26
    • Akira MiyamotoToshiaki NishimuraYoshitaka YamagishiYasumitsu Higuchi
    • Akira MiyamotoToshiaki NishimuraYoshitaka YamagishiYasumitsu Higuchi
    • C08G8/28C08G10/02C08G10/04C08G14/04C08G16/02
    • C08G14/04C08G10/02C08G10/04C08G8/28
    • A highly reactive aromatic hydrocarbon-formaldehyde resin having a diarlymethane content of not more than 5% by weight, essentially containing reactive groups of any one of CH.sub.2 OH, CH.sub.2 OCH.sub.3 and CH.sub.2 OCH.sub.2 OCH.sub.3 at both molecular terminals and having a xylenol value of at least 15 mol/kg as an index of reactivity with a compound having active hydrogen atoms is prepared by reacting an aromatic hydrocarbon such as xylene, mesitylene or naphthalene with formaldehyde at a molar ratio of the formaldehyde to the aromatic hydrocarbon of 2.0 to 5.0, a sulfuric acid concentration of 15 to 35% by weight in an aqueous layer and a reaction temperature of 80.degree. to 110.degree. C. while controlling a formaldehyde conversion within a range of 50 to 70% by mole over the range 4 to 8 hours. By reaction of the aromatic hydrocarbon-formaldehyde resin with the compound having reactive hydrogen atoms such as phenols and carboxylic acids, a modified aromatic hydrocarbon resin capable of giving a cured resin having a high mechanical strength and a high heat resistance can be obtained.
    • 二甲苯含量为5重量%以下的高反应性芳烃 - 甲醛树脂,基本上含有两个分子末端的CH 2 OH,CH 2 OCH 3和CH 2 OCH 2 CH 3中的任何一种的反应性基团,二甲苯酚值至少为15mol / kg 作为与具有活性氢原子的化合物的反应性的指标,是通过使二甲苯,均三甲苯,萘等芳香族烃与甲醛与芳香族烃的摩尔比为2.0〜5.0,硫酸浓度15 至35重量%,反应温度为80℃至110℃,同时在4-80小时的范围内控制甲醛转化率为50至70摩尔%。 通过芳族烃 - 甲醛树脂与具有反应性氢原子的化合物如酚和羧酸的反应,可以获得能够得到具有高机械强度和高耐热性的固化树脂的改性芳族烃树脂。