Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Synthesis method of polycarboxylic acid macromolecules applied to mold gypsum
The invention discloses a synthetic method of polycarboxylic acid macromolecules applied to mold gypsum, which comprises the following steps: S1, heating by adopting an air bath, and firstly, adding quantitative water into a three-neck bottle to dissolve sodium allylsulfonate; s2, continuing to add methyl alkenyl polyoxyethylene polyoxypropylene ether and raising the temperature; s3, dropwise adding acrylic acid and an initiator for multiple times in batches, continuing to heat, and reacting for a period of time and then ending; and S4, cooling after the reaction is finished, and neutralizing the pH value of the solution to 7 by using a sodium hydroxide solution to obtain a final product. The polycarboxylic acid macromolecules synthesized by the invention are high in adaptability and good in compatibility, and after being added into alpha or beta semi-hydrated gypsum, the polycarboxylic acid macromolecules have excellent dispersing capacity, fluidity keeping capacity, low air entraining function and small retarding effect, and the water-gypsum ratio is reduced, so that the strength of the ceramic mold gypsum is improved, the use efficiency of a ceramic mold is improved, and the production cost is reduced.
本发明公开了一种应用于模具石膏中的聚羧酸大分子的合成方法，包括如下步骤：S1、采用空气浴加热，先在三口瓶内加入定量的水将丙烯磺酸钠溶解；S2、继续加入甲基烯基聚氧乙烯聚氧丙烯醚并升温；S3、再多次分批滴加丙烯酸和引发剂，继续升温，反应一段时间后结束；S4、反应结束冷却后使用氢氧化钠溶液中和溶液pH至7，获得最终产品。本发明合成的聚羧酸大分子适应性较高相容性较好，加入至α或β半水石膏中后，具有优异的分散能力、流动性保持能力和低引气功能，较小的缓凝作用，降低水膏比，从而提高陶瓷模具石膏强度，提高陶瓷模具的使用效率，降低生产成本。
Synthesis method of polycarboxylic acid macromolecules applied to mold gypsum
The invention discloses a synthetic method of polycarboxylic acid macromolecules applied to mold gypsum, which comprises the following steps: S1, heating by adopting an air bath, and firstly, adding quantitative water into a three-neck bottle to dissolve sodium allylsulfonate; s2, continuing to add methyl alkenyl polyoxyethylene polyoxypropylene ether and raising the temperature; s3, dropwise adding acrylic acid and an initiator for multiple times in batches, continuing to heat, and reacting for a period of time and then ending; and S4, cooling after the reaction is finished, and neutralizing the pH value of the solution to 7 by using a sodium hydroxide solution to obtain a final product. The polycarboxylic acid macromolecules synthesized by the invention are high in adaptability and good in compatibility, and after being added into alpha or beta semi-hydrated gypsum, the polycarboxylic acid macromolecules have excellent dispersing capacity, fluidity keeping capacity, low air entraining function and small retarding effect, and the water-gypsum ratio is reduced, so that the strength of the ceramic mold gypsum is improved, the use efficiency of a ceramic mold is improved, and the production cost is reduced.
本发明公开了一种应用于模具石膏中的聚羧酸大分子的合成方法，包括如下步骤：S1、采用空气浴加热，先在三口瓶内加入定量的水将丙烯磺酸钠溶解；S2、继续加入甲基烯基聚氧乙烯聚氧丙烯醚并升温；S3、再多次分批滴加丙烯酸和引发剂，继续升温，反应一段时间后结束；S4、反应结束冷却后使用氢氧化钠溶液中和溶液pH至7，获得最终产品。本发明合成的聚羧酸大分子适应性较高相容性较好，加入至α或β半水石膏中后，具有优异的分散能力、流动性保持能力和低引气功能，较小的缓凝作用，降低水膏比，从而提高陶瓷模具石膏强度，提高陶瓷模具的使用效率，降低生产成本。
Synthesis method of polycarboxylic acid macromolecules applied to mold gypsum
一种应用于模具石膏中的聚羧酸大分子的合成方法
SU XINLU (Autor:in) / QIAN JIAJIA (Autor:in) / SHI LEI (Autor:in) / MAO RONGLIANG (Autor:in)
22.12.2023
Patent
Elektronische Ressource
Chinesisch
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