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Starch-based slump-retaining water reducing agent and preparation method thereof
The invention provides a starch-based slump-retaining water reducing agent and a preparation method thereof, and the starch-based slump-retaining water reducing agent is prepared from the following raw materials in parts by weight: 150-250 parts of polysaccharide polymer esterification liquid, 11-22 parts of carboxyl-terminated vinyl epoxy ether, 0.8-1 part of initiator, 4-11 parts of acrylic acid, 10-15 parts of hydroxyl ester monomer, 0-0.3 part of reducing agent and 0.3-0.7 part of chain transfer agent. 1-3 parts of a coagulation accelerating component; the preparation raw materials of the polysaccharide polymer esterification liquid comprise the following components in parts by weight: enzymolysis starch, a mixture of short linear chain degraded starch and alkyl glycoside, a dispersing agent, unsaturated carboxylic acid and/or unsaturated anhydride, an esterification catalyst and a polymerization inhibitor. The starch-based slump-retaining water reducing agent is used for performing unsaturated acid esterification on a mixture of enzymolysis starch, short straight chain degraded starch and alkyl glycoside, so that a starch chain is grafted with a group with an unsaturated bond, the starch chain can be polymerized with a polyether monomer to form a comb-shaped structure, and a water reducing effect can be achieved when the starch-based slump-retaining water reducing agent is added into concrete.
本发明提供了一种淀粉基保坍减水剂及其制备方法，该淀粉基保坍减水剂的制备原料包括按重量份计的以下组分：150‑250份多糖聚合物酯化液、11‑22份端羧基乙烯基环氧醚，0.8‑1份引发剂，4‑11份丙烯酸，10‑15份羟基酯类单体，还原剂0‑0.3份，链转移剂0.3‑0.7份，1‑3份促凝组分；所述多糖聚合物酯化液的制备原料按重量份计包括以下组分：酶解淀粉，短直链降解淀粉及烷基糖苷混合物，分散剂，不饱和羧酸和/或不饱和酸酐，酯化催化剂，阻聚剂。该淀粉基保坍减水剂对酶解淀粉、短直链降解淀粉及烷基糖苷混合物进行不饱和酸酯化，使淀粉链接枝上带有不饱和键的基团，可以与聚醚单体聚合产形成梳形结构，加入混凝土可以起到减水作用。
Starch-based slump-retaining water reducing agent and preparation method thereof
The invention provides a starch-based slump-retaining water reducing agent and a preparation method thereof, and the starch-based slump-retaining water reducing agent is prepared from the following raw materials in parts by weight: 150-250 parts of polysaccharide polymer esterification liquid, 11-22 parts of carboxyl-terminated vinyl epoxy ether, 0.8-1 part of initiator, 4-11 parts of acrylic acid, 10-15 parts of hydroxyl ester monomer, 0-0.3 part of reducing agent and 0.3-0.7 part of chain transfer agent. 1-3 parts of a coagulation accelerating component; the preparation raw materials of the polysaccharide polymer esterification liquid comprise the following components in parts by weight: enzymolysis starch, a mixture of short linear chain degraded starch and alkyl glycoside, a dispersing agent, unsaturated carboxylic acid and/or unsaturated anhydride, an esterification catalyst and a polymerization inhibitor. The starch-based slump-retaining water reducing agent is used for performing unsaturated acid esterification on a mixture of enzymolysis starch, short straight chain degraded starch and alkyl glycoside, so that a starch chain is grafted with a group with an unsaturated bond, the starch chain can be polymerized with a polyether monomer to form a comb-shaped structure, and a water reducing effect can be achieved when the starch-based slump-retaining water reducing agent is added into concrete.
本发明提供了一种淀粉基保坍减水剂及其制备方法，该淀粉基保坍减水剂的制备原料包括按重量份计的以下组分：150‑250份多糖聚合物酯化液、11‑22份端羧基乙烯基环氧醚，0.8‑1份引发剂，4‑11份丙烯酸，10‑15份羟基酯类单体，还原剂0‑0.3份，链转移剂0.3‑0.7份，1‑3份促凝组分；所述多糖聚合物酯化液的制备原料按重量份计包括以下组分：酶解淀粉，短直链降解淀粉及烷基糖苷混合物，分散剂，不饱和羧酸和/或不饱和酸酐，酯化催化剂，阻聚剂。该淀粉基保坍减水剂对酶解淀粉、短直链降解淀粉及烷基糖苷混合物进行不饱和酸酯化，使淀粉链接枝上带有不饱和键的基团，可以与聚醚单体聚合产形成梳形结构，加入混凝土可以起到减水作用。
Starch-based slump-retaining water reducing agent and preparation method thereof
淀粉基保坍减水剂及其制备方法
FENG KE (author) / NI TAO (author) / WANG YONGMEI (author) / SONG XIN (author) / HUANG YUMEI (author) / YANG XIAOFENG (author) / WANG JINCHUN (author) / LIU ZHAOYANG (author) / DONG SHUQIANG (author) / LI XIXI (author)
2023-03-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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