Slow-release slump retaining agent and preparation method thereof

• Main Authors: ZHAO YUWEI, QIU NIANLI, XIONG QIUMIN, HUANG DEDONG, CHEN XIAOBIN
• Format: Patent
• Language: Chinese; English
• Published: 29.04.2022
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; REFRACTORIES; SLAG; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF NATURAL STONE

The invention relates to a slow-release slump retaining agent and a preparation method thereof. The slow-release slump retaining agent is prepared from the following raw materials: 2000-3000 parts of unsaturated polyether macromonomer; 5-15 parts of an initiator; 40 to 120 parts of unsaturated acid; 150 to 300 parts of an unsaturated functional monomer; and 1500 to 2000 parts of water. Wherein the unsaturated functional monomer contains a hydroxyl group, a sulfonic acid group and an ester group. According to the slow-release slump retaining agent prepared by the invention, unsaturated functional monomers containing hydroxyl, sulfonic acid groups and ester groups are introduced, hydration of cement in concrete is hindered, so that a slow-release effect is achieved, when the slow-release slump retaining agent prepared by the invention is matched with a common water reducing agent for use, the dosage of the water reducing agent can be properly reduced, and the cost performance is higher; meanwhile, the dosage of