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Reduction type polycarboxylate superplasticizer and preparation method thereof
The invention discloses a shrinkage-reducing polycarboxylate superplasticizer and a preparation method thereof, and relates to the field of concrete admixtures. The reduction type polycarboxylate superplasticizer is prepared from the following raw materials in parts by weight: 85 to 95 parts of silicon modified unsaturated polyether macromonomer, 20 to 30 parts of unsaturated phosphate monomer, 4 to 6 parts of unsaturated sulfonic acid or unsaturated sulfonate, 30 to 40 parts of acrylic acid, 0.75 to 1 part of reducing agent, 1.5 to 2 parts of oxidizing agent, 1 to 2 parts of chain transfer agent and 500 parts of water. The silicon-modified unsaturated polyether monomer is a product obtained by carrying out a reaction on a chlorosilane compound and allyl-terminated hydroxyl-terminated polyether to remove HCl, the general formula of the allyl-terminated hydroxyl-terminated polyether is CH2 = CHCH2O (CH2CH2O) m (CH2CHCH3O) nH, m is greater than or equal to 0, n is greater than or equal to 0, and m + n is greater than or equal to 20 and less than or equal to 30. The shrinkage-reducing type polycarboxylate superplasticizer has good dispersibility and shrinkage-reducing performance in high-strength concrete, and can effectively reduce the drying shrinkage of the high-strength concrete.
本申请公开了一种减缩型聚羧酸减水剂及其制备方法，涉及混凝土外加剂领域，其中，减缩型聚羧酸减水剂的制备原料包括85‑95重量份硅改性不饱和聚醚大单体、20‑30重量份不饱和磷酸酯单体、4‑6重量份不饱和磺酸或不饱和磺酸盐、30‑40重量份丙烯酸、0.75‑1重量份还原剂、1.5‑2重量份氧化剂、1‑2重量份链转移剂以及500重量份水；硅改性不饱和聚醚单体为氯代硅烷类化合物与端烯丙基端羟基聚醚反应脱除HCl的产物，端烯丙基端羟基聚醚的通式为CH2＝CHCH2O(CH2CH2O)m(CH2CHCH3O)nH,m≥0，n≥0，20≤m+n≤30。该减缩型聚羧酸减水剂在高强混凝土中的分散性与减缩性能好，可有效降低高强混凝土的干燥收缩。
Reduction type polycarboxylate superplasticizer and preparation method thereof
The invention discloses a shrinkage-reducing polycarboxylate superplasticizer and a preparation method thereof, and relates to the field of concrete admixtures. The reduction type polycarboxylate superplasticizer is prepared from the following raw materials in parts by weight: 85 to 95 parts of silicon modified unsaturated polyether macromonomer, 20 to 30 parts of unsaturated phosphate monomer, 4 to 6 parts of unsaturated sulfonic acid or unsaturated sulfonate, 30 to 40 parts of acrylic acid, 0.75 to 1 part of reducing agent, 1.5 to 2 parts of oxidizing agent, 1 to 2 parts of chain transfer agent and 500 parts of water. The silicon-modified unsaturated polyether monomer is a product obtained by carrying out a reaction on a chlorosilane compound and allyl-terminated hydroxyl-terminated polyether to remove HCl, the general formula of the allyl-terminated hydroxyl-terminated polyether is CH2 = CHCH2O (CH2CH2O) m (CH2CHCH3O) nH, m is greater than or equal to 0, n is greater than or equal to 0, and m + n is greater than or equal to 20 and less than or equal to 30. The shrinkage-reducing type polycarboxylate superplasticizer has good dispersibility and shrinkage-reducing performance in high-strength concrete, and can effectively reduce the drying shrinkage of the high-strength concrete.
本申请公开了一种减缩型聚羧酸减水剂及其制备方法，涉及混凝土外加剂领域，其中，减缩型聚羧酸减水剂的制备原料包括85‑95重量份硅改性不饱和聚醚大单体、20‑30重量份不饱和磷酸酯单体、4‑6重量份不饱和磺酸或不饱和磺酸盐、30‑40重量份丙烯酸、0.75‑1重量份还原剂、1.5‑2重量份氧化剂、1‑2重量份链转移剂以及500重量份水；硅改性不饱和聚醚单体为氯代硅烷类化合物与端烯丙基端羟基聚醚反应脱除HCl的产物，端烯丙基端羟基聚醚的通式为CH2＝CHCH2O(CH2CH2O)m(CH2CHCH3O)nH,m≥0，n≥0，20≤m+n≤30。该减缩型聚羧酸减水剂在高强混凝土中的分散性与减缩性能好，可有效降低高强混凝土的干燥收缩。
Reduction type polycarboxylate superplasticizer and preparation method thereof
一种减缩型聚羧酸减水剂及其制备方法
OH JONGHAK (author)
2024-12-27
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
/
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
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