Production technology of polycarboxylate superplasticizer

Abstract

A production technology of a polycarboxylate superplasticizer comprises the following steps: weighing the following components at weight ratio according to the technological process: 2500-2800 parts of methyl acrylic polyether (VPEG-2400), 120-150 parts of acrylic acid, 450-550 parts of hydroxyethyl acrylate, 3-8 parts of vitamin C, 15-25 parts of 3-mercaptopropionic acid, 15-25 parts of hydrogen peroxide with the volume concentration of 27.5% and 2750-3440 parts of deionized water. The raw materials of the polycarboxylate superplasticizer are rich in source, easy to acquire and relatively low in cost, the manufacturing technology is simple, the production conditions are mild, during production, no hazardous materials is emitted and lots of by-products cannot be produced, and the requirements for energy saving and environmental protection are satisfied. Besides, the produced polycarboxylate superplasticizer not containing chloride ions is non-corrosive to steel bars, high in adaptability, suitable for cement of various specifications and models, stable in performance, free from layering and sedimentation after being stored for a long time, crystallization-free in winter, nontoxic and pollution-free, and safe to the environment.

Description

technical field

[0001] The invention relates to the field of chemical building materials, in particular to a production process of a polycarboxylate water reducer. Background technique

[0002] Polycarboxylate Superplasticizer (Polycarboxylate Superplasticizer) is a high-performance water-reducing agent and a cement dispersant in the application of cement concrete. Widely used in highways, bridges, dams, tunnels, high-rise buildings and other projects. The product is green, non-flammable and non-explosive, and can be safely transported by train and automobile. It can significantly increase the strength of concrete, improve the frost resistance and impermeability of concrete or reduce the amount of cement. Several water reducers commonly used in the market are: lignosulfonate sodium salt water reducer, naphthalene-based high-efficiency water reducer, aliphatic high-efficiency water-reducer, amino high-efficiency water-reducer, polycarboxylate high-performance water-reducer ...

Examples

specific Embodiment 1

[0017] Specific embodiment 1. The production process steps of the polycarboxylate superplasticizer are: (1) Weigh the following components by weight ratio: 2500 parts of methallyl alcohol polyoxyethylene ether (VPEG-2400) (each part 1KG , the same below), 120 parts of acrylic acid, 450 parts of hydroxyethyl acrylate, 3 parts of vitamin C, 15 parts of 3-mercaptopropionic acid, 15 parts of hydrogen peroxide with a volume concentration of 27.5%, and 2750 parts of deionized water; Prepare material A, material B, material C, and material D in the following ways, of which material A is 2500 parts of methallyl alcohol polyoxyethylene ether (VPEG-2400), material B is composed of 120 parts of acrylic acid, 450 parts of hydroxyethyl acrylate, 280 parts of deionized water are uniformly mixed and dissolved in the batching tank. Material C is prepared by uniformly mixing and dissolving 3 parts of vitamin C, 15 parts of 3-mercaptopropionic acid, and 950 parts of deionized water in the batchi...

specific Embodiment 2

[0018] Specific Example 2: The production process steps of the polycarboxylate superplasticizer are: (1) Weigh the following components by weight ratio: 2600 parts of methallyl alcohol polyoxyethylene ether (VPEG-2400), 130 parts of acrylic acid , 500 parts of hydroxyethyl acrylate, 5 parts of vitamin C, 20 parts of 3-mercaptopropionic acid, 20 parts of hydrogen peroxide with a volume concentration of 27.5%, and 2950 parts of deionized water; the above-mentioned components are prepared in the following ways respectively A material, B Material, material C, material D, wherein material A is 2600 parts of methallyl alcohol polyoxyethylene ether (VPEG-2400), material B is made of 130 parts of acrylic acid, 500 parts of hydroxyethyl acrylate, and 300 parts of deionized water in the ingredients It is prepared by uniformly mixing and dissolving in the tank. Material C is prepared by uniformly mixing and dissolving 5 parts of vitamin C, 20 parts of 3-mercaptopropionic acid, and 1000 pa...

specific Embodiment 3

[0019]Specific Example Three: The production process steps of the polycarboxylate superplasticizer are: (1) Weigh the following components by weight ratio: 2800 parts of methallyl alcohol polyoxyethylene ether (VPEG-2400), 150 parts of acrylic acid , 550 parts of hydroxyethyl acrylate, 8 parts of vitamin C, 25 parts of 3-mercaptopropionic acid, 25 parts of hydrogen peroxide with a volume concentration of 27.5%, and 3,440 parts of deionized water; the above-mentioned components were prepared in the following ways A material, B Material, C material, D material, among which A material methallyl alcohol polyoxyethylene ether (VPEG-2400) 2800 parts, B material is composed of 150 parts of acrylic acid, 550 parts of hydroxyethyl acrylate, 360 parts of deionized water in the batching tank It is prepared by uniformly mixing and dissolving in the medium. Material C is prepared by uniformly mixing and dissolving 8 parts of vitamin C, 25 parts of 3-mercaptopropionic acid, and 1100 parts of...

technical field

[0001] The invention relates to the field of chemical building materials, in particular to a production process of a polycarboxylate water reducer. Background technique

[0002] Polycarboxylate Superplasticizer (Polycarboxylate Superplasticizer) is a high-performance water-reducing agent and a cement dispersant in the application of cement concrete. Widely used in highways, bridges, dams, tunnels, high-rise buildings and other projects. The product is green, non-flammable and non-explosive, and can be safely transported by train and automobile. It can significantly increase the strength of concrete, improve the frost resistance and impermeability of concrete or reduce the amount of cement. Several water reducers commonly used in the market are: lignosulfonate sodium salt water reducer, naphthalene-based high-efficiency water reducer, aliphatic high-efficiency water-reducer, amino high-efficiency water-reducer, polycarboxylate high-performance water-reducer ...

Examples

specific Embodiment 1

[0017] Specific embodiment 1. The production process steps of the polycarboxylate superplasticizer are: (1) Weigh the following components by weight ratio: 2500 parts of methallyl alcohol polyoxyethylene ether (VPEG-2400) (each part 1KG , the same below), 120 parts of acrylic acid, 450 parts of hydroxyethyl acrylate, 3 parts of vitamin C, 15 parts of 3-mercaptopropionic acid, 15 parts of hydrogen peroxide with a volume concentration of 27.5%, and 2750 parts of deionized water; Prepare material A, material B, material C, and material D in the following ways, of which material A is 2500 parts of methallyl alcohol polyoxyethylene ether (VPEG-2400), material B is composed of 120 parts of acrylic acid, 450 parts of hydroxyethyl acrylate, 280 parts of deionized water are uniformly mixed and dissolved in the batching tank. Material C is prepared by uniformly mixing and dissolving 3 parts of vitamin C, 15 parts of 3-mercaptopropionic acid, and 950 parts of deionized water in the batchi...

specific Embodiment 2

[0018] Specific Example 2: The production process steps of the polycarboxylate superplasticizer are: (1) Weigh the following components by weight ratio: 2600 parts of methallyl alcohol polyoxyethylene ether (VPEG-2400), 130 parts of acrylic acid , 500 parts of hydroxyethyl acrylate, 5 parts of vitamin C, 20 parts of 3-mercaptopropionic acid, 20 parts of hydrogen peroxide with a volume concentration of 27.5%, and 2950 parts of deionized water; the above-mentioned components are prepared in the following ways respectively A material, B Material, material C, material D, wherein material A is 2600 parts of methallyl alcohol polyoxyethylene ether (VPEG-2400), material B is made of 130 parts of acrylic acid, 500 parts of hydroxyethyl acrylate, and 300 parts of deionized water in the ingredients It is prepared by uniformly mixing and dissolving in the tank. Material C is prepared by uniformly mixing and dissolving 5 parts of vitamin C, 20 parts of 3-mercaptopropionic acid, and 1000 pa...

specific Embodiment 3

[0019]Specific Example Three: The production process steps of the polycarboxylate superplasticizer are: (1) Weigh the following components by weight ratio: 2800 parts of methallyl alcohol polyoxyethylene ether (VPEG-2400), 150 parts of acrylic acid , 550 parts of hydroxyethyl acrylate, 8 parts of vitamin C, 25 parts of 3-mercaptopropionic acid, 25 parts of hydrogen peroxide with a volume concentration of 27.5%, and 3,440 parts of deionized water; the above-mentioned components were prepared in the following ways A material, B Material, C material, D material, among which A material methallyl alcohol polyoxyethylene ether (VPEG-2400) 2800 parts, B material is composed of 150 parts of acrylic acid, 550 parts of hydroxyethyl acrylate, 360 parts of deionized water in the batching tank It is prepared by uniformly mixing and dissolving in the medium. Material C is prepared by uniformly mixing and dissolving 8 parts of vitamin C, 25 parts of 3-mercaptopropionic acid, and 1100 parts of...

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