A kind of viscosity-reducing polycarboxylate water reducer and preparation method thereof

Abstract

The application relates to the field of water reducers, and discloses a viscosity-reducing polycarboxylate water reducer and a preparation method thereof. The viscosity-reducing polycarboxylate water reducer includes the following raw materials in parts by weight: 5-8 parts of methacrylic acid; 15-20 parts of acrylic acid; 2-3 parts of methoxypolyethylene glycol acrylate; 1-2 parts of methyl 1-2 parts of initiator; 4-5 parts of 3-oxetanone; 1.5-2 parts of dimethyl sebacate; 40-50 parts of water; the preparation method is: 3-oxygen Heterobutanone and dimethyl sebacate are mixed and added to the polycarboxylate product mixed with water to obtain a water reducer; the application has the following advantages and effects: in the conventional polycarboxylate water reducer component, further Add the mixed product of 3-oxetanone and dimethyl sebacate to make it diffuse into the cement particles, combine with oily molecules through heterocyclic atoms, and be formed by the special space of 3-oxetanone The configuration reduces the formation of complexes between cement particles, reduces the aggregation of cement particles, achieves the purpose of reducing viscosity, and reduces the viscosity of concrete.

Description

technical field

[0001] The present application relates to the field of water reducers, in particular to a viscosity-reducing polycarboxylate water reducer and a preparation method thereof. Background technique

[0002] When preparing concrete with higher strength grades, high-performance water-reducing agents with high water-reducing rates are usually selected. Polycarboxylate superplasticizer has excellent properties such as high water reducing rate, obvious reinforcement effect, and low slump loss of concrete mixture, and has become a hot spot in the research and development of superplasticizers at home and abroad.

[0003] At present, the patent with the publication number CN106348635A discloses a polycarboxylate water reducer, which is composed of the following raw materials in parts by weight: 10-15 parts of isobutenol polyoxyethylene ether, 5-8 parts of tartaric acid, 1- 3 parts, 0.5-2 parts of sodium methacrylate, 1-2 parts of paraben preservatives, 10-20 parts of wa...

Examples

Embodiment 1

[0040] This application discloses a viscosity-reducing polycarboxylate water reducer, the raw materials of which include methacrylic acid, acrylic acid, methoxypolyethylene glycol acrylate, sodium methacrylate, initiator, 3-oxetane Ketone, dimethyl sebacate and water, wherein the initiator is ammonium persulfate, and the contents of each component are shown in Table 1 below.

[0041] A preparation method of a viscosity-reducing polycarboxylate water reducer, comprising the steps of:

[0042] Mix 3-oxetanone and dimethyl sebacate, heat up to 40°C and stir for 30 minutes to obtain a heterocyclic product;

[0043] Under the condition of constant temperature water bath at 90°C, mix methacrylic acid, acrylic acid, methoxypolyethylene glycol acrylate and sodium methacrylic sulfonate to obtain a mixed solution, then add it dropwise to water, and then add the initiator dropwise, in 3h After the internal dropwise addition, continue to keep warm for 1 hour, adjust the pH value to 5 wit...

Embodiment 2

[0045] This application discloses a viscosity-reducing polycarboxylate water reducer, the raw materials of which include methacrylic acid, acrylic acid, methoxypolyethylene glycol acrylate, sodium methacrylate, initiator, 3-oxetane Ketone, dimethyl sebacate and water, wherein the initiator is potassium persulfate, and the contents of each component are shown in Table 1 below.

[0046] A preparation method of a viscosity-reducing polycarboxylate water reducer, comprising the steps of:

[0047] Mix 3-oxetanone and dimethyl sebacate, heat up to 45°C and stir for 40 minutes to obtain a heterocyclic product;

[0048] Under the condition of constant temperature water bath at 95°C, mix methacrylic acid, acrylic acid, methoxypolyethylene glycol acrylate and sodium methacrylic sulfonate to obtain a mixed solution, then add it dropwise to water, and then add the initiator dropwise, in 4h After the internal dropwise addition, continue to keep warm for 1 hour, adjust the pH value to 6 wi...

Embodiment 3

[0050]This application discloses a viscosity-reducing polycarboxylate water reducer, the raw materials of which include methacrylic acid, acrylic acid, methoxypolyethylene glycol acrylate, sodium methacrylate, initiator, 3-oxetane Ketone, dimethyl sebacate and water, wherein the initiator is ammonium persulfate, and the contents of each component are shown in Table 1 below.

[0051] A preparation method of a viscosity-reducing polycarboxylate water reducer, comprising the steps of:

[0052] Mix 3-oxetanone and dimethyl sebacate, heat up to 43°C and stir for 35 minutes to obtain a heterocyclic product;

[0053] Under the condition of a constant temperature water bath at 92°C, mix methacrylic acid, acrylic acid, methoxypolyethylene glycol acrylate and sodium methacrylic sulfonate to obtain a mixed solution, then add it dropwise to water, and then add the initiator dropwise, within 3 hours After the internal dropwise addition, continue to keep warm for 1 hour, and adjust the pH ...

technical field

[0001] The present application relates to the field of water reducers, in particular to a viscosity-reducing polycarboxylate water reducer and a preparation method thereof. Background technique

[0002] When preparing concrete with higher strength grades, high-performance water-reducing agents with high water-reducing rates are usually selected. Polycarboxylate superplasticizer has excellent properties such as high water reducing rate, obvious reinforcement effect, and low slump loss of concrete mixture, and has become a hot spot in the research and development of superplasticizers at home and abroad.

[0003] At present, the patent with the publication number CN106348635A discloses a polycarboxylate water reducer, which is composed of the following raw materials in parts by weight: 10-15 parts of isobutenol polyoxyethylene ether, 5-8 parts of tartaric acid, 1- 3 parts, 0.5-2 parts of sodium methacrylate, 1-2 parts of paraben preservatives, 10-20 parts of wa...

Examples

Embodiment 1

[0040] This application discloses a viscosity-reducing polycarboxylate water reducer, the raw materials of which include methacrylic acid, acrylic acid, methoxypolyethylene glycol acrylate, sodium methacrylate, initiator, 3-oxetane Ketone, dimethyl sebacate and water, wherein the initiator is ammonium persulfate, and the contents of each component are shown in Table 1 below.

[0041] A preparation method of a viscosity-reducing polycarboxylate water reducer, comprising the steps of:

[0042] Mix 3-oxetanone and dimethyl sebacate, heat up to 40°C and stir for 30 minutes to obtain a heterocyclic product;

[0043] Under the condition of constant temperature water bath at 90°C, mix methacrylic acid, acrylic acid, methoxypolyethylene glycol acrylate and sodium methacrylic sulfonate to obtain a mixed solution, then add it dropwise to water, and then add the initiator dropwise, in 3h After the internal dropwise addition, continue to keep warm for 1 hour, adjust the pH value to 5 wit...

Embodiment 2

[0045] This application discloses a viscosity-reducing polycarboxylate water reducer, the raw materials of which include methacrylic acid, acrylic acid, methoxypolyethylene glycol acrylate, sodium methacrylate, initiator, 3-oxetane Ketone, dimethyl sebacate and water, wherein the initiator is potassium persulfate, and the contents of each component are shown in Table 1 below.

[0046] A preparation method of a viscosity-reducing polycarboxylate water reducer, comprising the steps of:

[0047] Mix 3-oxetanone and dimethyl sebacate, heat up to 45°C and stir for 40 minutes to obtain a heterocyclic product;

[0048] Under the condition of constant temperature water bath at 95°C, mix methacrylic acid, acrylic acid, methoxypolyethylene glycol acrylate and sodium methacrylic sulfonate to obtain a mixed solution, then add it dropwise to water, and then add the initiator dropwise, in 4h After the internal dropwise addition, continue to keep warm for 1 hour, adjust the pH value to 6 wi...

Embodiment 3

[0050]This application discloses a viscosity-reducing polycarboxylate water reducer, the raw materials of which include methacrylic acid, acrylic acid, methoxypolyethylene glycol acrylate, sodium methacrylate, initiator, 3-oxetane Ketone, dimethyl sebacate and water, wherein the initiator is ammonium persulfate, and the contents of each component are shown in Table 1 below.

[0051] A preparation method of a viscosity-reducing polycarboxylate water reducer, comprising the steps of:

[0052] Mix 3-oxetanone and dimethyl sebacate, heat up to 43°C and stir for 35 minutes to obtain a heterocyclic product;

[0053] Under the condition of a constant temperature water bath at 92°C, mix methacrylic acid, acrylic acid, methoxypolyethylene glycol acrylate and sodium methacrylic sulfonate to obtain a mixed solution, then add it dropwise to water, and then add the initiator dropwise, within 3 hours After the internal dropwise addition, continue to keep warm for 1 hour, and adjust the pH ...

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