A high-expansion two-component polyurethane grouting material with adjustable curing time and preparation method thereof

Abstract

The invention discloses a high-expansion two-component polyurethane grouting material with adjustable curing time and a preparation method thereof. The high-expansion two-component polyurethane grouting material with adjustable curing time is prepared by mixing a component A and a component B. The method for preparing the component A comprises: heating a polyether polyol to 110-120° C., dehydrating for 1-2 hours under a vacuum degree of ‑0.1-0.09 MPa until the moisture content is less than 0.05wt%, cooling to 20-40° C., adding isocyanate, and polymerizing at 70-85° C. for 1-1.5 hours to obtain the component A; and the method for preparing the component B comprises: uniformly mixing a plasticizer, a catalyst and a foam stabilizer, and dehydrating for 1-2 hours under a vacuum degree of 110-120° C. and ‑0.1-0.09 MPa until the moisture content is less than 0.05wt%. The high expansion two-component polyurethane grouting material with adjustable curing time is particularly suitable for northern regions. Even in the sub-zero temperature environment in winter, the setting time can be adjusted by adjusting the B component. It has a high expansion rate and high non-volatile content, and meets the requirements of the building materials industry standard JC / T 2041-2010.

Description

Technical Field

[0001] The invention belongs to the technical field of polyurethane grouting, and in particular relates to a high-expansion two-component polyurethane grouting material with adjustable curing time and a preparation method thereof. Background Art

[0002] Chemical grouting is a reinforcement technology that uses chemical grouting pumps and other pressure-delivery equipment to inject certain chemical grouting materials into rock and soil layers or cracks to make them penetrate, diffuse, gel or solidify, thereby changing the physical and mechanical properties of the rock and soil layers to waterproof and plug leaks, reinforce defects and enhance the strength of the stratum. In other words, chemical grouting is a technology that combines chemistry with engineering to ensure the smooth progress of the project or to improve the quality of the project.

[0003] There are many kinds of common chemical grouting materials, which are mainly divided into inorganic grouting materials and organic grouting materials. Polyurethane grouting material is an organic polymer material that came out in the 1960s. It is widely used in various grouting projects because of its strong slurry penetration ability, easy construction, fast curing speed at room temperature, high strength of the consolidated body, strong anti-seepage ability, excellent reinforcement and water blocking effect, good filling and sealing effect, etc. It is the preferred material for rapid rescue. However, it is greatly affected by temperature, construction is difficult in low temperature environment, material strength develops slowly, and it is easy to lose under moving water conditions. Especially in the winter in northern regions, inorganic building materials, especially cement buildings, often have fine capillary structures under the influence of climate, which leads to a decrease in their weather resistance. The tightness of the combination of organic grouting plugging materials and inorganic building materials has certain limitations. If the foaming rate of the grouting material is low, the filling and sealing effect is poor, and the grouting effect is not ideal, more grouting materials need to be poured for plugging. While wasting resources, it will also greatly reduce the cost of engineering waterproofing and plugging. The formed solid body shrinks, and the part bonded to the leaking point is separated, thereby completely losing the plugging effect. Summary of the invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a high-expansion two-component polyurethane grouting material with adjustable curing time.

[0005] Another object of the present invention is to provide a method for preparing the high-expansion two-component polyurethane grouting material with adjustable curing time obtained by the above preparation method.

[0006] The purpose of the present invention is achieved through the following technical solutions.

[0007] A high-expansion two-component polyurethane grouting material with adjustable curing time, which is prepared by mixing component A and component B, wherein the ratio of component A to component B is 1:0.1 by mass.

[0008] The method for preparing the component A comprises: heating the polyether polyol to 110-120° C., dehydrating for 1-2 hours under a vacuum degree of -0.1-0.09 MPa until the moisture content is less than 0.05wt%, cooling to 20-40° C., adding isocyanate, and polymerizing at 70-85° C. for 1-1.5 hours to obtain the component A, wherein the ratio of the isocyanate to the polyether polyol is (35-50):(25-40) by mass; the isocyanate is diisocyanate or toluene diisocyanate; and the polyether polyol is a difunctional polyether polyol and / or a trifunctional polyether polyol;

[0009] The method for preparing the B component comprises: uniformly mixing a plasticizer, a catalyst and a foam stabilizer, dehydrating for 1 to 2 hours at 110 to 120° C. and a vacuum degree of -0.1 to -0.09 MPa until the moisture content is less than 0.05 wt %, and obtaining the B component, wherein the ratio of the plasticizer, the catalyst and the foam stabilizer is (10 to 20): (1 to 5): (1 to 2) by mass; the plasticizer is a mixture of dioctyl phthalate and diethylene glycol dibenzoate; the catalyst is a mixture of a tertiary amine catalyst and a metal catalyst, the tertiary amine catalyst is at least one of triethylamine, dodeca-tertiary amine, tetradeca-tertiary amine, triethylenediamine, diethylenetriamine and N-methylmorpholine, the metal catalyst is at least one of organic tin, organic zinc and organic zirconium; and the foam stabilizer is a water-soluble organic silicone compound.

[0010] In the above technical solution, the water-soluble organic silicon oxane compound is polyalkylsiloxane.

[0011] In the above technical solution, when the polyether polyol is a difunctional polyether polyol and a trifunctional polyether polyol, the ratio of the difunctional polyether polyol to the trifunctional polyether polyol is (22-33):(2-4) by weight.

[0012] In the above technical solution, the number average molecular weight of the polyether polyol is 1000-3000.

[0013] In the above technical solution, the ratio of dioctyl phthalate to diethylene glycol dibenzoate is 1:1 by mass.

[0014] In the above technical solution, the ratio of the tertiary amine catalyst to the metal catalyst is 1:1 by mass.

[0015] In the above technical scheme, the polyether polyol is a mixture of polyether diol of Mn1000, polyether diol of Mn2000 and polyether triol of Mn3000, and the ratio of polyether diol of Mn1000, polyether diol of Mn2000 and polyether triol of Mn3000 is (9-14):(13.5-20):(2.2-3.3) by mass.

[0016] The method for preparing the above-mentioned high-expansion two-component polyurethane grouting material with adjustable curing time comprises the following steps:

[0017] Component A and component B are prepared, and component A and component B are evenly mixed to obtain the high-expansion two-component polyurethane grouting material with adjustable curing time.

[0018] The application of the above-mentioned high-expansion two-component polyurethane grouting material with adjustable curing time in improving the foaming rate of slurry.

[0019] The above-mentioned high-expansion two-component polyurethane grouting material with adjustable curing time is used to shorten the setting time of slurry.

[0020] The technical solution of the present invention has the following beneficial effects:

[0021] 1. The present invention is particularly suitable for northern regions. Even in winter under sub-zero temperatures, the setting time can be adjusted by adjusting component B. The construction method is simple and suitable for waterproofing, plugging leaks, and reinforcing in many fields.

[0022] 2. The curing time of the present invention is adjustable. The highly expansive two-component polyurethane grouting material has a high expansion rate and a high non-volatile matter content, and can effectively prevent secondary water leakage caused by solid shrinkage.

[0023] 3. The high-expansion two-component polyurethane grouting material with adjustable curing time of the present invention has excellent performance indicators and meets the requirements of the building materials industry standard JC / T 2041-2010. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below in conjunction with specific embodiments.

[0025] Isocyanate was toluene-2,4-diisocyanate purchased from Shanghai Titan Technology Co., Ltd.;

[0026] Polyether polyols were purchased from Tianjin Xiensipude Technology Co., Ltd. as Mn1000 and Mn2000;

[0027] Polyether triol was purchased from Shanghai Yien Chemical Technology Co., Ltd. as Mn3000;

[0028] Plasticizers dioctyl phthalate and diethylene glycol dibenzoate were purchased from Tianjin Xiensi Pude Technology Co., Ltd.;

[0029] Catalysts N-methylmorpholine and dibutyltin dilaurate were purchased from Kaimart (Tianjin) Chemical Technology Co., Ltd. and Tianjin Xiensipud Technology Co., Ltd., respectively;

[0030] The foam stabilizer polyalkylsiloxane was purchased from Tianjin Xiensi Pude Technology Co., Ltd.

[0031] The mass fractions of component A and component B in the following examples are respectively carried out.

[0032] Example 1

[0033] A high-expansion two-component polyurethane grouting material with adjustable curing time, which is prepared by mixing component A and component B, wherein the ratio of component A to component B is 1:0.1 by mass.

[0034] The method for preparing component A comprises: in a reaction kettle, heating the polyether polyol to 110° C., dehydrating for 1 hour under a vacuum degree of -0.09 MPa until the moisture content is less than 0.05 wt %, cooling to 40° C., adding isocyanate, and polymerizing at 75° C. for 1 hour to obtain component A;

[0035]

[0036] The method for preparing component B comprises: in a reaction kettle, mixing a plasticizer, a catalyst and a foam stabilizer uniformly, and dehydrating for 1 hour at 110° C. and a vacuum degree of -0.09 MPa until the moisture content is less than 0.05wt%, to obtain component B.

[0037]

[0038] The method for preparing the above-mentioned high-expansion two-component polyurethane grouting material with adjustable curing time comprises the following steps:

[0039] A component and a B component are prepared, and the A component and the B component are evenly mixed to obtain a high-expansion two-component polyurethane grouting material with adjustable curing time.

[0040] Example 2

[0041] A high-expansion two-component polyurethane grouting material with adjustable curing time, which is prepared by mixing component A and component B, wherein the ratio of component A to component B is 1:0.1 by mass.

[0042] The method for preparing component A comprises: in a reaction kettle, heating the polyether polyol to 110° C., dehydrating for 1 hour under a vacuum degree of -0.09 MPa until the moisture content is less than 0.05 wt %, cooling to 40° C., adding isocyanate, and polymerizing at 75° C. for 1 hour to obtain component A;

[0043]

[0044] The method for preparing component B comprises: in a reaction kettle, mixing a plasticizer, a catalyst and a foam stabilizer uniformly, and dehydrating for 1 hour at 110° C. and a vacuum degree of -0.09 MPa until the moisture content is less than 0.05wt%, to obtain component B.

[0045]

[0046]

[0047] The method for preparing the above-mentioned high-expansion two-component polyurethane grouting material with adjustable curing time comprises the following steps:

[0048] A component and a B component are prepared, and the A component and the B component are evenly mixed to obtain a high-expansion two-component polyurethane grouting material with adjustable curing time.

[0049] Example 3

[0050] A high-expansion two-component polyurethane grouting material with adjustable curing time, which is prepared by mixing component A and component B, wherein the ratio of component A to component B is 1:0.1 by mass.

[0051] The method for preparing component A comprises: in a reaction kettle, heating the polyether polyol to 110° C., dehydrating for 1 hour under a vacuum degree of -0.09 MPa until the moisture content is less than 0.05 wt %, cooling to 40° C., adding isocyanate, and polymerizing at 75° C. for 1 hour to obtain component A;

[0052]

[0053] The method for preparing component B comprises: in a reaction kettle, mixing a plasticizer, a catalyst and a foam stabilizer uniformly, and dehydrating for 1 hour at 110° C. and a vacuum degree of -0.09 MPa until the moisture content is less than 0.05wt%, to obtain component B.

[0054]

[0055] The method for preparing the above-mentioned high-expansion two-component polyurethane grouting material with adjustable curing time comprises the following steps:

[0056] A component and a B component are prepared, and the A component and the B component are evenly mixed to obtain a high-expansion two-component polyurethane grouting material with adjustable curing time.

[0057] Example 4

[0058] A high-expansion two-component polyurethane grouting material with adjustable curing time, which is prepared by mixing component A and component B, wherein the ratio of component A to component B is 1:0.1 by mass.

[0059] The method for preparing component A comprises: in a reaction kettle, heating the polyether polyol to 110° C., dehydrating for 1 hour under a vacuum degree of -0.09 MPa until the moisture content is less than 0.05 wt %, cooling to 40° C., adding isocyanate, and polymerizing at 75° C. for 1 hour to obtain component A;

[0060]

[0061] The method for preparing component B comprises: in a reaction kettle, mixing a plasticizer, a catalyst and a foam stabilizer uniformly, and dehydrating for 1 hour at 110° C. and a vacuum degree of -0.09 MPa until the moisture content is less than 0.05wt%, to obtain component B.

[0062]

[0063] The method for preparing the above-mentioned high-expansion two-component polyurethane grouting material with adjustable curing time comprises the following steps:

[0064] A component and a B component are prepared, and the A component and the B component are evenly mixed to obtain a high-expansion two-component polyurethane grouting material with adjustable curing time.

[0065] Example 5

[0066] A high-expansion two-component polyurethane grouting material with adjustable curing time, which is prepared by mixing component A and component B, wherein the ratio of component A to component B is 1:0.1 by mass.

[0067] The method for preparing component A comprises: in a reaction kettle, heating the polyether polyol to 110° C., dehydrating for 1 hour under a vacuum degree of -0.09 MPa until the moisture content is less than 0.05 wt %, cooling to 40° C., adding isocyanate, and polymerizing at 75° C. for 1 hour to obtain component A;

[0068]

[0069]

[0070] The method for preparing component B comprises: in a reaction kettle, mixing a plasticizer, a catalyst and a foam stabilizer uniformly, and dehydrating for 1 hour at 110° C. and a vacuum degree of -0.09 MPa until the moisture content is less than 0.05wt%, to obtain component B.

[0071]

[0072] The method for preparing the above-mentioned high-expansion two-component polyurethane grouting material with adjustable curing time comprises the following steps:

[0073] A component and a B component are prepared, and the A component and the B component are evenly mixed to obtain a high-expansion two-component polyurethane grouting material with adjustable curing time.

[0074] Example 6

[0075] A high-expansion two-component polyurethane grouting material with adjustable curing time, which is prepared by mixing component A and component B, wherein the ratio of component A to component B is 1:0.1 by mass.

[0076] The method for preparing component A comprises: in a reaction kettle, heating the polyether polyol to 110° C., dehydrating for 1 hour under a vacuum degree of -0.09 MPa until the moisture content is less than 0.05 wt %, cooling to 40° C., adding isocyanate, and polymerizing at 75° C. for 1 hour to obtain component A;

[0077]

[0078] The method for preparing component B comprises: in a reaction kettle, mixing a plasticizer, a catalyst and a foam stabilizer uniformly, and dehydrating for 1 hour at 110° C. and a vacuum degree of -0.09 MPa until the moisture content is less than 0.05wt%, to obtain component B.

[0079]

[0080]

[0081] The method for preparing the above-mentioned high-expansion two-component polyurethane grouting material with adjustable curing time comprises the following steps:

[0082] A component and a B component are prepared, and the A component and the B component are evenly mixed to obtain a high-expansion two-component polyurethane grouting material with adjustable curing time.

[0083] Comparative Example 1

[0084] Castor oil-based polyurethane slurry developed by the Guangzhou Institute of Chemistry, Chinese Academy of Sciences is commercially available

[0085] Comparative Example 2

[0086] HW waterborne polyurethane developed by East China Survey and Design Institute

[0087] The high-expansion two-component polyurethane grouting materials with adjustable curing time obtained in Examples 1 to 6, the castor oil-based polyurethane slurry obtained in Comparative Example 1, and the HW water-based polyurethane obtained in Comparative Example 2 were tested, and the main performance parameters are shown in the table:

[0088]

[0089] It can be seen from the test data in the table that the performance of the high-expansion two-component polyurethane grouting material with adjustable curing time obtained in Examples 1 to 6 is better than that of the castor oil-based polyurethane slurry obtained in Comparative Example 1 and the HW water-based polyurethane obtained in Comparative Example 2.

[0090] In addition, the performance indicators of the high-expansion two-component polyurethane grouting materials with adjustable curing time in Examples 1-6 are far superior to the industry standard JC / T2041-2010 for polyurethane grouting materials.

[0091] The present invention is described above by way of example. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by those skilled in the art without inventive effort falls within the protection scope of the present invention.

Claims

1. A high-expansion two-component polyurethane grouting material with adjustable curing time, characterized in that: The mixture is formed by mixing component A and component B, wherein the ratio of component A to component B is 1:0.1 by weight. The method for preparing the component A comprises: heating the polyether polyol to 110-120° C., dehydrating for 1-2 hours under a vacuum degree of -0.1-0.09 MPa until the moisture content is less than 0.05wt%, cooling to 20-40° C., adding isocyanate, and polymerizing at 70-85° C. for 1-1.5 hours to obtain the component A, wherein the ratio of the isocyanate to the polyether polyol is 39:25 by mass; the isocyanate is toluene diisocyanate; and the polyether polyol is a mixture of a polyether diol of Mn1000, a polyether diol of Mn2000, and a polyether triol of Mn3000; The method for preparing the B component comprises: uniformly mixing a plasticizer, a catalyst and a foam stabilizer, dehydrating for 1 to 2 hours at 110 to 120° C. and a vacuum degree of -0.1 to -0.09 MPa until the moisture content is less than 0.05wt%, and obtaining the B component, wherein the ratio of the plasticizer, the catalyst and the foam stabilizer is 15:4.4:1.7 by weight; the plasticizer is a mixture of dioctyl phthalate and diethylene glycol dibenzoate; the catalyst is a mixture of a tertiary amine catalyst and a metal catalyst, the tertiary amine catalyst is N-methylmorpholine, and the metal catalyst is dibutyltin dilaurate; the foam stabilizer is a polyalkylsiloxane; The method for preparing the high-expansion two-component polyurethane grouting material with adjustable curing time comprises the following steps: preparing component A and component B, and mixing component A and component B evenly to obtain the high-expansion two-component polyurethane grouting material with adjustable curing time.

2. The high-expansion two-component polyurethane grouting material with adjustable curing time according to claim 1, characterized in that: In terms of mass fractions, the ratio of the polyether diol of Mn1000, the polyether diol of Mn2000 and the polyether triol of Mn3000 is 9.09:13.64:2.

27.

3. The high-expansion two-component polyurethane grouting material with adjustable curing time according to claim 1, characterized in that: The ratio of dioctyl phthalate to diethylene glycol dibenzoate is 1:1 by mass, and the ratio of the tertiary amine catalyst to the metal catalyst is 1:1 by mass.

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