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Production method of polyacrylamide modified water absorbent resin concrete internal curing agent

A technology of polyacrylamide and water-absorbent resin, applied in the field of concrete additives, can solve the problems of troublesome concrete maintenance, difficult access, concrete deformation and cracking, etc., and achieve the effects of reducing migration gradient, simple operation and obvious maintenance effect.

Inactive Publication Date: 2014-03-19
NANTONG KEYI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few applications of concrete additives. The maintenance of ordinary concrete is very troublesome. When the concrete is dry, it is difficult for the moisture from the external maintenance to enter the interior of the concrete, resulting in deformation and cracking of the concrete.

Method used

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  • Production method of polyacrylamide modified water absorbent resin concrete internal curing agent
  • Production method of polyacrylamide modified water absorbent resin concrete internal curing agent
  • Production method of polyacrylamide modified water absorbent resin concrete internal curing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this embodiment, the weight percentage of each monomer and water is: AM: MBA: sodium propylene sulfonate: acrylic acid: water = 20:5:20:10:45.

[0039] Solution preparation: Add 450g of distilled water to a 2000ml beaker, add 200g of AM monomer, 50g of MBA monomer, add 200g of sodium propylene sulfonate monomer, add 100g of acrylic acid monomer, stir and dissolve for 30 minutes, and slowly add in And agent (sodium hydroxide) to pH6.5±0.5. The stirring solution was continued to ripen for 30 minutes.

[0040] Solution adjustment: according to the pH range after aging, use sodium hydroxide (pH alkaline regulator) or phosphoric acid (pH acidic regulator) to adjust the pH value to 6.5±0.5 again, and adjust the temperature to 10±1°C.

[0041] Polymerization of the solution: Blowing nitrogen to remove oxygen for 15-20 minutes, under the protection of nitrogen, add catalysts V651g / L, V500.1g / L, ammonium persulfate 0.08g / L, sodium formaldehyde sulfoxylate 0.08g / L, until Sto...

Embodiment 2

[0044] Weight percent of each monomer in water: AM: MBA: sodium propylene sulfonate: acrylic acid: water = 30:8:20:10:32.

[0045] Solution preparation: Add 320g of distilled water to a 2000ml beaker, add 300g of AM monomer, 80g of MBA monomer, add 200g of sodium propylene sulfonate monomer, add 100g of acrylic acid monomer, stir and dissolve for 30 minutes, slowly add in And agent (sodium hydroxide) to pH6.5±0.5. The stirring solution was continued to ripen for 30 minutes.

[0046] Solution adjustment: according to the pH range after aging, use sodium hydroxide (pH alkaline regulator) or phosphoric acid (pH acidic regulator) to adjust the pH value to 6.5±0.5 again, and adjust the temperature to 10±1°C.

[0047] Polymerization of the solution: Blow nitrogen to deoxygenate for 15-20 minutes, add catalyst V65lg / L, V500.1g / L, ammonium persulfate 0.08g / L, sodium formaldehyde sulfoxylate 0.08g / L sequentially under nitrogen protection, stop Blow nitrogen and open the UV lamp tube ...

Embodiment 3

[0050] Weight percent of each monomer in water: AM: MBA: sodium propylene sulfonate: acrylic acid: water = 30:8:10:5:47.

[0051] Preparation of the solution: Add 470g of distilled water to a 2000ml beaker, add 300g of AM monomer, 80g of MBA monomer, add 100g of sodium propylene sulfonate monomer, add 50g of acrylic acid monomer, stir and dissolve for 30 minutes, and slowly add in And agent (sodium hydroxide) to pH6.5±0.5. The stirring solution was continued to ripen for 30 minutes.

[0052] Solution adjustment: according to the pH range after aging, use sodium hydroxide (pH alkaline regulator) or phosphoric acid (pH acidic regulator) to adjust the pH value to 6.5±0.5 again, and adjust the temperature to 10±1°C.

[0053] Polymerization of the solution: Blow nitrogen to remove oxygen for 15-20 minutes, add catalyst V651.5g / L, V500.3g / L, ammonium persulfate 0.1g / L, sodium formaldehyde sulfoxylate 0.1g / L in sequence under nitrogen protection , stop blowing nitrogen and turn on ...

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Abstract

The invention discloses a production method of a polyacrylamide modified water absorbent resin concrete internal curing agent. The polyacrylamide modified water absorbent resin concrete internal curing agent is copolymerized from four monomers, namely acrylamide, N, N-methylene-bis-acrylamide, sodium allylsulfonate and acrylic acid. The invention further discloses a preparation method of a curing agent with a spatial reticular branched chain structure. Compared with the prior art, the curing agent disclosed by the invention has the performance characteristics of small using quantity, obvious curing effect, no need of externally adding water and simplicity in operation.

Description

technical field [0001] The invention relates to a concrete additive, in particular to a polyacrylamide modified water-absorbing resin used in the field of internal maintenance of concrete and a synthesis method of the maintenance agent. Background technique [0002] Polyacrylamide modified water-absorbing resin is a kind of high molecular polymer with wide application. It can be used as heavy metal adsorbent for leather and other industrial waste water, water-retaining and fertilizer-retaining agent in agriculture, water-absorbing agent for hygiene products in hygiene, waterproof and medicine and other fields. However, there are very few applications of concrete additives, and the maintenance of ordinary concrete is very troublesome. When the concrete is dry, it is difficult for the moisture from external maintenance to enter the interior of the concrete, resulting in deformation and cracking of the concrete. In particular, high-performance concrete has high strength and hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F228/02C08F220/06C08F222/38C08F4/40C08F4/04C04B24/26
Inventor 唐富刚郝春玲赵志会穆巍
Owner NANTONG KEYI CHEM
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