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A platform for research: civil engineering, architecture and urbanism
High-temperature delayed tackifying anti-settling agent as well as preparation method and application thereof
The invention belongs to the technical field of cement additives, and particularly relates to a high-temperature delayed tackifying anti-settling agent and a preparation method and application thereof.The anti-settling agent is prepared from, by mass, 1.5%-5% of tannin, 10%-31% of first vinyl monomer, 2%-10% of second vinyl monomer, 0.1%-2% of first cross-linking agent, 1%-5% of second cross-linking agent and 60%-70% of auxiliaries, the auxiliaries are an emulsifier, an initiator, a poising agent, mineral oil and water; the first vinyl monomer comprises N, N-dimethylacrylamide, and further comprises any one or two of N-isopropylacrylamide, N-acryloyl morpholine, dimethylaminopropyl methacrylamide and 2-acrylamide-2-methyl-sodium propanesulfonate; the second vinyl monomer comprises one or two of N-isopropylacrylamide, N-acryloyl morpholine, dimethylaminopropyl methacrylamide and 2-acrylamide-2-methyl-sodium propanesulfonate; the second vinyl monomer is dimethylaminoethyl methacrylate. According to the invention, tannin is used as a trunk and is grafted with a vinyl monomer, and a crosslinking technology is utilized to form an ultrahigh-temperature-resistant natural modified macromolecule, so that an effect of increasing the viscosity of the slurry is achieved under high-temperature and alkaline conditions, and meanwhile, adverse effects on the low-temperature rheology of the cement slurry are avoided.
本发明属于水泥添加剂技术领域，尤其涉及一种高温延迟增粘防沉降剂、制备方法及应用，防沉降剂按照质量分数计包括单宁1.5～5％、第一乙烯基单体10～31％、第二乙烯基单体2～10％、第一交联剂0.1～2％、第二交联剂1～5％、助剂60～70％，助剂为乳化剂、引发剂、平衡剂、矿物油和水；第一乙烯基单体包括NN‑二甲基丙烯酰胺，还包括N‑异丙基丙烯酰胺、N‑丙烯酰吗啉、二甲氨基丙基甲基丙烯酰胺、2‑丙烯酰氨‑2‑甲基‑丙磺酸钠中的任意一种或两种；第二乙烯基单体为甲基丙烯酸二甲氨基乙酯。本发明以单宁为主干，接枝乙烯基单体，利用交联技术，形成具有耐超高温的天然改性大分子，在高温及碱性条件下，具有增加浆体粘度的效果，同时不会对水泥浆低温流变学产生不利影响。
High-temperature delayed tackifying anti-settling agent as well as preparation method and application thereof
The invention belongs to the technical field of cement additives, and particularly relates to a high-temperature delayed tackifying anti-settling agent and a preparation method and application thereof.The anti-settling agent is prepared from, by mass, 1.5%-5% of tannin, 10%-31% of first vinyl monomer, 2%-10% of second vinyl monomer, 0.1%-2% of first cross-linking agent, 1%-5% of second cross-linking agent and 60%-70% of auxiliaries, the auxiliaries are an emulsifier, an initiator, a poising agent, mineral oil and water; the first vinyl monomer comprises N, N-dimethylacrylamide, and further comprises any one or two of N-isopropylacrylamide, N-acryloyl morpholine, dimethylaminopropyl methacrylamide and 2-acrylamide-2-methyl-sodium propanesulfonate; the second vinyl monomer comprises one or two of N-isopropylacrylamide, N-acryloyl morpholine, dimethylaminopropyl methacrylamide and 2-acrylamide-2-methyl-sodium propanesulfonate; the second vinyl monomer is dimethylaminoethyl methacrylate. According to the invention, tannin is used as a trunk and is grafted with a vinyl monomer, and a crosslinking technology is utilized to form an ultrahigh-temperature-resistant natural modified macromolecule, so that an effect of increasing the viscosity of the slurry is achieved under high-temperature and alkaline conditions, and meanwhile, adverse effects on the low-temperature rheology of the cement slurry are avoided.
本发明属于水泥添加剂技术领域，尤其涉及一种高温延迟增粘防沉降剂、制备方法及应用，防沉降剂按照质量分数计包括单宁1.5～5％、第一乙烯基单体10～31％、第二乙烯基单体2～10％、第一交联剂0.1～2％、第二交联剂1～5％、助剂60～70％，助剂为乳化剂、引发剂、平衡剂、矿物油和水；第一乙烯基单体包括NN‑二甲基丙烯酰胺，还包括N‑异丙基丙烯酰胺、N‑丙烯酰吗啉、二甲氨基丙基甲基丙烯酰胺、2‑丙烯酰氨‑2‑甲基‑丙磺酸钠中的任意一种或两种；第二乙烯基单体为甲基丙烯酸二甲氨基乙酯。本发明以单宁为主干，接枝乙烯基单体，利用交联技术，形成具有耐超高温的天然改性大分子，在高温及碱性条件下，具有增加浆体粘度的效果，同时不会对水泥浆低温流变学产生不利影响。
High-temperature delayed tackifying anti-settling agent as well as preparation method and application thereof
一种高温延迟增粘防沉降剂、制备方法及应用
LIU ZHONGHUA (author)
2024-08-09
Patent
Electronic Resource
Chinese
IPC:
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C09K
Materialien für Anwendungen, soweit nicht anderweitig vorgesehen
,
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR
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