发明名称 |
PRODUCTION OF PARTIALLY HYDROLYZED ACRYLAMIDE-BASED POLYMER FINE PARTICLE |
摘要 |
PURPOSE:To readily obtain the subject fine particles for a coagulant, etc., at a low cost by supplying an acrylamide aqueous solution on an endless substrate in a state of a thin layer, irradiating radioactive rays for aqueous solution polymerization, forming the produced polymer into fine particles, mixing the resultant particles with causic alkali powder and then drying the mixture. CONSTITUTION:An aqueous solution of acrylamide with 35-50wt.% concentration is supplied onto an endless substrate in a state of a thin layer in an atmosphere ot an inert gas and subjected to aqueous solution polymerization at <=80 deg.C maximum temperature of the polymerization system by irradiation of ultraviolet rays while a liquid coolant is blown on the back surface of the endless substrate for cooling. The resultant acrylamide-based polymer gel with 5-15mm thickness produced in a state of a layer is mixed with causic alkali powder with <=0.5-2m/m particle size under stirring and the mixture is kept within a temperature range raised by heat of hydration and heat of solution for 10-60min. followed by drying to <=10wt.% water content using hot air at 80-100 deg.C. Thereby the objective polymer fine particles are obtained. |
申请公布号 |
JPH02123102(A) |
申请公布日期 |
1990.05.10 |
申请号 |
JP19880274793 |
申请日期 |
1988.10.31 |
申请人 |
DAI ICHI KOGYO SEIYAKU CO LTD |
发明人 |
KAWAMORI YOSHIHIRO;KOIZUMI YOSHIROU;NISHIYAMA TADASHI;ADACHI SEIJI |
分类号 |
B29B9/04;B29B13/00;B29C41/28;B29K33/00;C08F2/04;C08F2/10;C08F2/48;C08F6/06;C08F6/12;C08F8/12;C08F20/52;C08F20/56;C08F220/04;C08F220/06;C08F220/56 |
主分类号 |
B29B9/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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