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Preparation method of polycarboxylic acid water reducer

A technology of water reducer and polycarboxylate, which is applied in the field of preparation of polycarboxylate water reducer, can solve problems affecting product use and unstable performance, and achieve the goal of ensuring stable performance, promoting performance stability, and ensuring stability Effect

Inactive Publication Date: 2019-05-14
张家港市嘉成新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the performance of various polycarboxylate water reducers is unstable, which affects the use of products.

Method used

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  • Preparation method of polycarboxylic acid water reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1, a kind of preparation method of polycarboxylate water reducer, its steps are:

[0013] Step 1: Pour 32% by weight of polyethylene glycol methacrylate monomer into the reactor, and add 63.35% by weight of water into the reactor for stirring to make it evenly mixed;

[0014] Step 2: Add 0.5% by weight of triethylenetetramine, 4% by weight of acrylic acid, and 0.15% by weight of vitamin C into the mixing tank, the concentration of acrylic acid is above 95%, and the purity of vitamin C is above 99%. , stir the three in the mixing tank evenly;

[0015] Step 3: Within two hours, keep the stirring shaft in the mixing tank and the reactor in working condition, and gradually and evenly add the mixture in the mixing tank into the reactor, and keep stirring in the reactor until the reaction is completed and the temperature of the material drops to room temperature .

Embodiment 2

[0016] Embodiment 2, a kind of preparation method of polycarboxylate water reducer, its steps are:

[0017] Step 1, pour 38% by weight of polyethylene glycol methacrylate monomer into the reactor, and add 58% by weight of water in the reactor for stirring to make it evenly mixed;

[0018] Step 2, adding 0.2% by weight of triethylenetetramine, 3.5% by weight of acrylic acid, and 0.3% by weight of vitamin C into the mixing tank, the concentration of acrylic acid is above 95%, and the purity of vitamin C is above 99% , stir the three in the mixing tank evenly;

[0019] Step 3: Within two hours, keep the stirring shaft in the mixing tank and the reactor in working condition, and gradually and evenly add the mixture in the mixing tank into the reactor, and keep stirring in the reactor until the reaction is completed and the temperature of the material drops to room temperature .

Embodiment 3

[0020] Embodiment 3, a kind of preparation method of polycarboxylate superplasticizer, its steps are:

[0021] Step 1: Pour 35% by weight of polyethylene glycol methacrylate monomer into the reactor, and add 60% by weight of water into the reactor for stirring to make it evenly mixed;

[0022] Step 2, adding 0.5% by weight of triethylenetetramine, 4.7% by weight of acrylic acid, and 0.2% by weight of vitamin C into the mixing tank, the concentration of acrylic acid is above 95%, and the purity of vitamin C is above 99% , stir the three in the mixing tank evenly;

[0023] Step 3: Within two hours, keep the stirring shaft in the mixing tank and the reactor in working condition, and gradually and evenly add the mixture in the mixing tank into the reactor, and keep stirring in the reactor until the reaction is completed and the temperature of the material drops to room temperature .

[0024] When the room temperature is lower than 0 degrees Celsius, turn on the heating rod in th...

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Abstract

The invention discloses a preparation method of a polycarboxylic acid water reducer, which comprises the steps of: step I, pouring 32-38wt% of polyethylene glycol methacrylate monomer into a reactionkettle, adding 56-62wt% of water into the reaction kettle for stirring, and uniformly mixing the monomer and the water, step II, adding 0.2-0.6wt% of triethylene tetramine, 3.5-5.2wt% of acrylic acid,0.1-0.3wt% of vitamin C into a mixing kettle, and uniformly stirring triethylene tetramine, acrylic acid and the vitamin C in the mixing kettle, and step III, keeping working states of stirring shafts in the mixing kettle and the reaction kettle within 2h, gradually and uniformly adding a mixture from the mixing kettle into the reaction kettle, performing continuous stirring in the reaction kettle till a reaction is finished, and cooling a temperature of a material to a room temperature.

Description

technical field [0001] The invention relates to a preparation method of a polycarboxylate water reducer. Background technique [0002] Polycarboxylate-based water reducer can prevent the loss of concrete slump without causing obvious retardation, and exerts a high plasticizing effect at a low dosage, has good fluidity retention, and has a large degree of freedom in cement adaptability to a wide range of molecular structures. There is a lot of room for many technologies and high performance. It has a significant effect on concrete reinforcement, can reduce concrete shrinkage, and has extremely low levels of harmful substances. It endows concrete with excellent workability, good strength development, and excellent durability. It meets the needs of modern concrete engineering. However, the performance of various polycarboxylate water reducers is unstable at present, which affects the use of products. Contents of the invention [0003] The technical problem to be solved by t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C04B24/26C04B103/30
Inventor 肖亚军李益军
Owner 张家港市嘉成新材料有限公司
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