摘要:
The present invention discloses a production method of core-shell type highly liquid absorbent resin particles comprising: (1) a first step in which a particle core portion is formed by suspension polymerizing an aqueous solution (e) containing (meth)acrylic acid, a crosslinking agent (c) and an anionic surfactant (d) in a hydrophobic organic solvent (a) containing a nonionic surfactant (b), and (2) a second step in which a shell portion that covers the particle core portion is formed by suspension polymerizing an aqueous solution (g) containing a water-soluble vinyl polymer (f), having carboxyl groups and polymerizable unsaturated double bonds and having a number average molecular weight of 500 to 10000, in a suspension obtained in the first step.
摘要:
The present invention discloses a production method of core-shell type highly liquid absorbent resin particles comprising: (1) a first step in which a particle core portion is formed by suspension polymerizing an aqueous solution (e) containing (meth)acrylic acid, a crosslinking agent (c) and an anionic surfactant (d) in a hydrophobic organic solvent (a) containing a nonionic surfactant (b), and(2) a second step in which a shell portion that covers the particle core portion is formed by suspension polymerizing an aqueous solution (g) containing a water-soluble vinyl polymer (f), having carboxyl groups and polymerizable unsaturated double bonds and having a number average molecular weight of 500 to 10000, in a suspension obtained in the first step.
摘要:
This thermosetting powder coating composition is a thermosetting powder coating composition which contains a coating forming component which can crosslink and harden by an ester exchange reaction between a carboxylic ester group and a hydroxyl group, and an ester exchange reaction catalyst, in which the ester exchange reaction catalyst is constituted from an organic sulfonate (X) derived from a carboxylic amide and an organic sulfonic acid having fluorine atoms.
摘要:
A boiler tube protector having a cylindrical or semi-cylindrical shape and adapted to be attached around an outer peripheral face of a boiler tube with mortar, which boiler tube protector includes a plurality of ceramic bodies closely arranged along their parting planes, wherein the parting planes includes a restraining portion for restraining slippage of each of the ceramic bodies.
摘要:
A method of attaching a boiler tube protectors having a cylindrical or semi-cylindrical shape around an outer peripheral face of a boiler tube with mortar, which boiler tube protectors, are a plurality of ceramic bodies closely arranged along their parting planes, wherein the parting planes includes means for restraining slippage of each of the ceramic bodies along the parting planes.
摘要:
It is an objective of the present invention to provide, in particular, a curable composition of an extremely high utility which yields a cured film having excellent acid resistance and the like. The curable composition of the present invention is used mainly for paints, adhesives, or sealing agents. The curable composition is based on crosslinking reaction between a specific substituted methyl ester group exemplified by an alkoxymethyl ester group and other functional groups, i.e., an epoxy group and an active hydrogen-containing group such as a hydroxyl group, a carbamate group, and an acetoacetoxy group. Thus, the present invention provides basically two types of compositions: one is the composition containing a self-crosslinkable polymer possessing both a substituted methyl ester group and an active hydrogen-containing group and/or an epoxy group, the other is the composition containing a compound possessing a substituted methyl ester group and a compound containing an active hydrogen-containing group and/or an epoxy group.
摘要:
A cyclodextrin derivative-containing a polystyrene based polymer containing units of structure having the formula: ##STR1## (wherein m is an integer of 1 to 10; n is 4, 5 or 6; R.sub.1 and R.sub.2 are hydrogen or alkyl groups containing 1 to 3 carbon atoms; and Z is an alkylene group containing 1 to 5 carbon atoms); a metal complex of the polystyrene based polymer; and a process for the production of the polystyrene based polymer or metal complex thereof.
摘要翻译:一种含有聚苯乙烯基聚合物的环糊精衍生物,其含有下式结构单元:其中m为1〜10的整数,n为4,5或6; R 1和R 2为氢或含有1〜 3个碳原子; Z是含有1至5个碳原子的亚烷基); 聚苯乙烯类聚合物的金属络合物; 以及制造聚苯乙烯类聚合物或其金属络合物的方法。