Anti-static polyurethane mortar self-leveling floor and its construction process

Abstract

The present invention relates to the field of floor construction, and specifically discloses an anti-static polyurethane mortar self-leveling floor and its construction process. The construction process includes the following steps: step 1) cleaning the surface to be constructed; step 2) building a formwork; step 3) preparing polyurethane mortar; step 4) injecting the polyurethane mortar into the formwork; step 5) standing until the polyurethane mortar solidifies, then removing the formwork to obtain the anti-static polyurethane mortar self-leveling floor; the polyurethane mortar includes the following components: a polyurethane composition, aggregate, a leveling agent, and an antistatic agent; the polyurethane composition is a compound of polycaprolactone triol, polyoxypropylene triol, polyethylene glycol adipate, and HDI trimer. The present invention has the advantage of increasing the compressive strength of the polyurethane mortar floor.

Description

Technical Field

[0001] The present invention relates to the field of floor construction, in particular to an anti-static polyurethane mortar self-leveling floor and a construction process thereof. Background Art

[0002] Polyurethane mortar floor is a ground structure paved with polyurethane mortar. Polyurethane mortar is an engineering material that uses polyurethane waterproof coating instead of cement as gel material and is combined with sand to form a material with better waterproof performance, certain elasticity, and strong adaptability to the deformation of base cracks. It also has excellent resistance to chemical corrosion and impact resistance, etc. It plays an important role in some special buildings.

[0003] With the development of science and technology, the application of large equipment is becoming more and more extensive, and polyurethane mortar flooring is often used in various factories due to its excellent chemical resistance. Although the existing polyurethane mortar flooring also has good hardness and strength, with the rise of large equipment and various production robots, the load-bearing performance requirements of factory floors are getting higher and higher. The existing polyurethane mortar flooring is difficult to meet the demand, resulting in large-scale equipment or production robots generating large vibration shocks during operation, which easily leads to cracking of the polyurethane mortar flooring. Therefore, there is still room for improvement. Summary of the Invention

[0004] In order to improve the compressive strength of polyurethane mortar flooring, the present application provides an anti-static polyurethane mortar self-leveling flooring and a construction process thereof.

[0005] In the first aspect, the present application provides a construction process for an anti-static polyurethane mortar self-leveling floor, which adopts the following technical solution:

[0006] A construction process for an anti-static polyurethane mortar self-leveling floor comprises the following steps:

[0007] Step 1), clean the surface to be constructed;

[0008] Step 2), build a template;

[0009] Step 3), preparing polyurethane mortar;

[0010] Step 4), injecting polyurethane mortar into the formwork;

[0011] Step 5), after the polyurethane mortar is cured, the formwork is removed to obtain an antistatic polyurethane mortar self-leveling floor;

[0012] The polyurethane mortar comprises the following components in parts by mass:

[0013] 15-18.5 parts of polyurethane composition;

[0014] 80-83 parts of aggregate;

[0015] 1-1.2 parts of leveling agent;

[0016] 0.5-0.8 parts of antistatic agent;

[0017] The polyurethane composition is a compound of polycaprolactone triol, polyoxypropylene triol, polyethylene adipate and HDI trimer;

[0018] The molar ratio of the polycaprolactone triol, polyoxypropylene triol, polyethylene adipate and HDI trimer is 0.19:0.41:0.52:1.

[0019] By adopting the above technical solution, the polyurethane composition is compounded with polycaprolactone triol, polyoxypropylene triol, polyethylene glycol adipate, and HDI trimer, so that the polyurethane composite used as a gel material has higher strength and higher softening temperature, so that the obtained polyurethane mortar has better high temperature resistance, is not easy to soften at high temperature, and has stronger compressive strength, better load-bearing performance, and more stable structure.

[0020] By adding the leveling agent, after the polyurethane mortar is injected in step 4), the polyurethane mortar can be self-leveling, without the need for additional spreading and leveling steps, making construction more convenient.

[0021] By adding antistatic agents, the prepared polyurethane mortar floor has better antistatic properties, which can better meet the needs of the factory and reduce the hazards of static electricity.

[0022] By compounding polycaprolactone triol, polyoxypropylene triol and polyethylene adipate, the composition of the soft segment of the polyurethane material is adjusted, the softening point is increased, and the high temperature resistance of the polyurethane mortar floor is improved. Moreover, after curing and cross-linking with the HDI trimer, an irregular cross-linking network can be formed, which is more suitable for embedding aggregates of different particle sizes and improves the bonding stability with the aggregate, making it difficult for the aggregate and the polyurethane material to separate, better sharing the force, thereby making the compressive strength higher and improving the structural stability of the polyurethane floor.

[0023] Preferably, the molecular weight of the polycaprolactone triol is 550.

[0024] By adopting the above technical solution and specifically selecting the molecular weight of polycaprolactone triol, the molecular chain length of polycaprolactone triol is just right, and the network structure formed after cross-linking and curing is better adapted to the aggregate, making the bonding between the aggregate and the polyurethane material more stable, thereby better improving the compressive strength of the polyurethane mortar floor.

[0025] Preferably, the molecular weight of the polyoxypropylene triol is 3000.

[0026] By adopting the above technical solution and specifically selecting the molecular weight of polyoxypropylene triol, the molecular chain length of polyoxypropylene triol is better matched with the molecular chain length of polycaprolactone triol, forming a complex and just right network structure, which better cooperates with the aggregate and better improves the compressive strength of the polyurethane mortar floor.

[0027] Preferably, the molecular weight of the polyethylene adipate is 1000.

[0028] By adopting the above technical solution and specifically selecting the molecular weight of polyethylene adipate, the molecular chain length of polyethylene adipate is exactly matched with the molecular chain length of polyoxypropylene triol and polycaprolactone triol, thereby forming a complex and just right cross-linked network structure, which has higher bonding stability with aggregates, thereby better improving the compressive strength of polyurethane mortar flooring.

[0029] Preferably, the aggregate is a machine-made sand mixture, and the machine-made sand mixture is compounded by coarse machine-made sand, medium machine-made sand and fine machine-made sand.

[0030] By adopting the above technical solution and using machine-made sand, since machine-made sand is formed by external force crushing during the preparation process, the surface of machine-made sand has more fine lines than the surface of natural sand. The polyurethane material has good fluidity before solidification and can penetrate well into the fine lines on the surface of machine-made sand, thereby greatly improving the bonding stability between the polyurethane material and the aggregate, better forming a whole, so that the polyurethane mortar floor has better compressive strength.

[0031] Preferably, the mass ratio of the coarse machine-made sand, medium machine-made sand and fine machine-made sand is 2:3:5.

[0032] By adopting the above technical solution, the aggregate particle size distribution is reasonable, and it is adapted to the special network structure of the polyurethane material, and is better embedded in the network structure, thereby better improving the integrity and making the compressive strength of the polyurethane mortar floor higher.

[0033] Preferably, the particle size of the coarse machine-made sand is 0.5-1 mm, the particle size of the medium machine-made sand is 0.25-0.5 mm, and the particle size of the fine machine-made sand is 0.125-0.25 mm.

[0034] By adopting the above technical solution and specifically selecting the particle size, the aggregate particle size distribution is better adapted to the auxiliary network structure of the polyurethane material, so that the connection between the polyurethane material and the aggregate is very stable, the compressive strength of the polyurethane mortar floor is better improved, the weight of large equipment is better carried, and it is not easily damaged under vibration and impact.

[0035] Preferably, the method for preparing the machine-made sand mixture is as follows:

[0036] Step 01) marble powder, talcum powder, wollastonite powder, cement, and water are uniformly mixed to form a mixture;

[0037] Step 02) The mixture is poured into a mold and cured to form a concrete block;

[0038] Step 03), crushing and screening the concrete blocks to obtain coarse machine-made sand, medium machine-made sand, and fine machine-made sand;

[0039] Step 04), coarse machine-made sand, medium machine-made sand, and fine machine-made sand are mixed in proportion to obtain a machine-made sand mixture;

[0040] The mass ratio of the marble powder, talcum powder, wollastonite powder, cement and water is 5.14:3:3.55:3.39:1.

[0041] By adopting the above technical solution, by compounding marble powder, talcum powder, wollastonite powder and cement, the concrete blocks produced have strong compressive strength, and produce appropriate surface cracks when crushed, and have high bonding stability with polyurethane materials. In addition, talcum powder can be used as a filler and a lubricant at the same time, so that the mixed material has good fluidity and is easy to construct. The obtained machine-made sand has excellent strength, thereby better improving the compressive strength of the polyurethane mortar floor.

[0042] In the second aspect, the present application provides an anti-static polyurethane mortar self-leveling floor, which adopts the following technical solution:

[0043] An antistatic polyurethane mortar self-leveling floor is prepared by the above-mentioned construction process of the antistatic polyurethane mortar self-leveling floor.

[0044] By adopting the above technical solution, the polyurethane mortar floor prepared has good antistatic properties and good compressive strength, and has a high softening point and good high temperature resistance.

[0045] In summary, this application has the following beneficial effects:

[0046] 1. Since the polyurethane composition of the present application is a compound of polycaprolactone triol, polyoxypropylene triol, polyethylene glycol adipate, and HDI trimer, the polyurethane composite as a gel material has higher strength and higher softening temperature, so that the obtained polyurethane mortar has better high temperature resistance, is not easy to soften at high temperatures, and has stronger compressive strength, better load-bearing performance, and more stable structure.

[0047] 2. In this application, it is preferred to use machine-made sand. Since machine-made sand is formed by external force during the preparation process, the surface of machine-made sand has more fine lines than the surface of natural sand. The polyurethane material has good fluidity before solidification and can penetrate well into the fine lines on the surface of machine-made sand, thereby greatly improving the bonding stability between the polyurethane material and the aggregate, forming a better whole, so that the polyurethane mortar floor has better compressive strength.

[0048] 3. In this application, it is preferred to use marble powder, talcum powder, wollastonite powder and cement to make concrete blocks with strong compressive strength, and produce appropriate surface cracks when broken, and have high bonding stability with polyurethane materials. In addition, talcum powder can be used as a filler and a lubricant at the same time, so that the mixed material has good fluidity and is easy to construct. The obtained machine-made sand has excellent strength, thereby better improving the compressive strength of the polyurethane mortar floor. DETAILED DESCRIPTION

[0049] The present application is further described in detail below with reference to the embodiments.

[0050] Example 1

[0051] A construction process for an anti-static polyurethane mortar self-leveling floor comprises the following steps:

[0052] Step 1) Clean the surface of the base to be constructed, then rinse with water and let it dry.

[0053] Step 2) Build a template on the surface of the base according to the scope to be constructed.

[0054] Step 3) preparing polyurethane mortar, specifically comprising:

[0055] Step 3-1) 1.045 kg of polycaprolactone triol, 12.3 kg of polyoxypropylene triol, and 5.2 kg of polyethylene adipate were added to a stirred tank at a speed of 240 r / min and stirred for 10 min. Then, 6.276 kg of HDI trimer was added to a stirred tank at a speed of 240 r / min and stirred for 3 min to obtain a polyurethane composition;

[0056] Step 3-2), weigh 18.5 kg of the polyurethane composition obtained in step 3-1) and put it into a stirring tank, then weigh 80 kg of aggregate, 1 kg of leveling agent, and 0.5 kg of antistatic agent and put them into the polyurethane composition, rotate at 120 r / min, and stir for 5 minutes to obtain polyurethane mortar.

[0057] Step 4) The polyurethane mortar prepared in step 3) is injected into the surface of the base layer surrounded by the template, and the amount of polyurethane mortar injected is calculated based on the surface area of ​​the base layer and the required floor thickness.

[0058] Step 5), after the polyurethane mortar is injected, it flows naturally until it is flat, and is left to stand for 24 hours to allow the polyurethane mortar to solidify, and then the formwork is removed to obtain an anti-static polyurethane mortar self-leveling floor.

[0059] Among them, polycaprolactone triol was purchased from Jining Tangyi Chemical Co., Ltd. with a molecular weight of 550.

[0060] Among them, polyoxypropylene triol was purchased from Green Union (Jining) Chemical Technology Co., Ltd. with a molecular weight of 3000.

[0061] Among them, polyethylene glycol adipate was purchased from Jiangsu Jiaren Chemical Co., Ltd. with a molecular weight of 1000.

[0062] Among them, HDI trimer was purchased from Jiangsu Leien Environmental Protection Technology Co., Ltd., CAS: 3779-63-3, content 99%, molecular weight 627.6.

[0063] Therefore, the molar ratio of polycaprolactone triol, polyoxypropylene triol, polyethylene adipate, and HDI trimer added in step 3-2) is 0.19:0.41:0.52:1.

[0064] Among them, the leveling agent was purchased from Tianjin Ruike Chemical Trading Co., Ltd., leveling agent RKZ7009.

[0065] Among them, the antistatic agent was purchased from Suzhou Jiesheng New Material Technology Co., Ltd., antistatic agent T-920.

[0066] Among them, the aggregate is a mixture of machine-made sand, which is composed of coarse machine-made sand, medium machine-made sand and fine machine-made sand. The mass ratio of coarse machine-made sand, medium machine-made sand and fine machine-made sand is 2:3:5. The particle size of coarse machine-made sand is 0.5-1mm, the particle size of medium machine-made sand is 0.25-0.5mm, and the particle size of fine machine-made sand is 0.125-0.25mm.

[0067] The preparation method of machine-made sand mixture is as follows:

[0068] Step 01), put 51.4kg marble powder, 30kg talcum powder, 35.5kg wollastonite powder, 33.9kg cement and 10kg water into a stirring tank, rotate at 240r / min, stir for 10min, mix evenly and form a mixture.

[0069] Step 02) The mixed material is poured into several 30cm×15cm×10cm molds, cured for 7 days, and demoulded to form several concrete blocks.

[0070] In step 03), the concrete block is crushed by a jaw crusher to obtain machine-made sand, which is sieved through a sieve to obtain coarse machine-made sand with a particle size of 0.5-1 mm, medium machine-made sand with a particle size of 0.25-0.5 mm, and fine machine-made sand with a particle size of 0.125-0.25 mm.

[0071] In step 04), coarse machine-made sand, medium machine-made sand, and fine machine-made sand are weighed and mixed in a mass ratio of 2:3:5 to obtain a machine-made sand mixture.

[0072] Example 2

[0073] A construction process for an anti-static polyurethane mortar self-leveling floor, compared with Example 1, differs only in that:

[0074] Step 3-2), weigh 16.8 kg of the polyurethane composition obtained in step 3-1) and put it into a stirring tank, then weigh 81.5 kg of aggregate, 1.1 kg of leveling agent, and 0.6 kg of antistatic agent and put them into the polyurethane composition, rotate at 120 r / min, and stir for 5 minutes to obtain polyurethane mortar.

[0075] Example 3

[0076] A construction process for an anti-static polyurethane mortar self-leveling floor, compared with Example 1, differs only in that:

[0077] Step 3-2), weigh 15 kg of the polyurethane composition obtained in step 3-1) and put it into a stirring tank, then weigh 83 kg of aggregate, 1.2 kg of leveling agent, and 0.8 kg of antistatic agent and put them into the polyurethane composition, rotate at 120 r / min, and stir for 5 minutes to obtain polyurethane mortar.

[0078] Example 4

[0079] A construction process for an anti-static polyurethane mortar self-leveling floor, compared with Example 1, differs only in that:

[0080] In the method for preparing the machine-made sand mixture:

[0081] In step 04), coarse machine-made sand, medium machine-made sand, and fine machine-made sand are weighed and mixed in a mass ratio of 3:2:4 to obtain a machine-made sand mixture.

[0082] Example 5

[0083] A construction process for an anti-static polyurethane mortar self-leveling floor, compared with Example 1, differs only in that:

[0084] In the method for preparing the machine-made sand mixture:

[0085] Calcite powder is used in equal amounts to replace marble powder.

[0086] Example 6

[0087] A construction process for an anti-static polyurethane mortar self-leveling floor, compared with Example 1, differs only in that:

[0088] In the method for preparing the machine-made sand mixture:

[0089] Calcite powder is used in equal amounts to replace wollastonite powder.

[0090] Example 7

[0091] A construction process for an anti-static polyurethane mortar self-leveling floor, compared with Example 1, differs only in that:

[0092] In the method for preparing the machine-made sand mixture:

[0093] Step 01), 35.5kg marble powder, 30kg talcum powder, 51.4kg wollastonite powder, 33.9kg cement and 10kg water are put into a stirring tank at a speed of 240r / min, stirred for 10min, and mixed evenly to form a mixture.

[0094] Comparative Example 1

[0095] A construction process for an anti-static polyurethane mortar self-leveling floor, compared with Example 1, differs only in that:

[0096] Step 3-1), 1.375 kg of polycaprolactone triol, 9.9 kg of polyoxypropylene triol, and 5.5 kg of polyethylene glycol adipate were added to a stirring tank at a speed of 240 r / min and stirred for 10 min, and then 6.276 kg of HDI trimer was added to a stirring tank at a speed of 240 r / min and stirred for 3 min to obtain a polyurethane composition.

[0097] Comparative Example 2

[0098] A construction process for an anti-static polyurethane mortar self-leveling floor, compared with Example 1, differs only in that:

[0099] Polyoxypropylene triol was used to replace polycaprolactone triol in equal amounts.

[0100] Comparative Example 3

[0101] A construction process for an anti-static polyurethane mortar self-leveling floor, compared with Example 1, differs only in that:

[0102] Polycaprolactone triol was used to replace polyoxypropylene triol in equal amounts.

[0103] Comparative Example 4

[0104] A construction process for an anti-static polyurethane mortar self-leveling floor, compared with Example 1, differs only in that:

[0105] Polycaprolactone diol was used to replace polyethylene adipate in equal amounts.

[0106] Polycaprolactone diol was commercially available and had a molecular weight of 1000.

[0107] Experiment 1

[0108] According to GB / T22374-2018 "Floor Coating Materials", the 7-day tensile bond strength (concrete base) and W-type compressive strength of the samples made of the antistatic polyurethane mortar prepared in each embodiment and comparative example were measured.

[0109] Experiment 2

[0110] The Vicat softening points of the samples made from the antistatic polyurethane mortars prepared in the examples and comparative examples were measured according to GB / T1633-2000 “Determination of the Vicat softening temperature of thermoplastics”.

[0111] Experiment 3

[0112] The surface resistivity and volume resistivity of the samples made of the antistatic polyurethane mortar prepared in each embodiment and comparative example were measured according to GB / T1410-2006 “Test method for volume resistivity and surface resistivity of solid insulating materials”.

[0113] The specific experimental data of Experiments 1-3 are shown in Table 1.

[0114] Table 1

[0115]

[0116] According to the comparison of the data of Example 1 and Comparative Examples 1-4 in Table 1, when the polyurethane composition is compounded with polycaprolactone triol, polyoxypropylene triol, polyethylene adipate, and HDI trimer in a specific proportion, the softening temperature and compressive strength are significantly improved. When the proportion of each component is changed or the component is reduced or replaced, the softening temperature and compressive strength are significantly decreased.

[0117] According to the data comparison between Examples 1 and 4-7 in Table 1, when the machine-made sand is made by mixing marble powder, talcum powder, wollastonite powder, cement and water in a specific proportion, the resulting floor has better compressive strength, stronger load-bearing capacity, and is less prone to damage. However, when the proportion of stone powder or the type of stone powder is changed, the compressive strength of the floor decreases to a certain extent.

[0118] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A construction process for anti-static polyurethane mortar self-leveling floor, characterized by: The following steps are involved: Step 1) Clean the surface to be constructed; Step 2), build the template; Step 3), preparing polyurethane mortar; Step 4), inject polyurethane mortar into the formwork; Step 5), let it stand until the polyurethane mortar is solidified, then remove the formwork to obtain the anti-static polyurethane mortar self-leveling floor; The polyurethane mortar comprises the following components in parts by mass: 15-18.5 parts of polyurethane composition; 80-83 parts of aggregate; 1-1.2 parts of leveling agent; 0.5-0.8 parts of antistatic agent; The polyurethane composition is a compound of polycaprolactone triol, polyoxypropylene triol, polyethylene adipate and HDI trimer; The molar ratio of the polycaprolactone triol, polyoxypropylene triol, polyethylene adipate and HDI trimer is 0.19:0.41:0.52:

1.

2. The construction process of an anti-static polyurethane mortar self-leveling floor according to claim 1 is characterized in that: The molecular weight of the polycaprolactone triol is 550.

3. The construction process of an anti-static polyurethane mortar self-leveling floor according to claim 1 is characterized in that: The molecular weight of the polyoxypropylene triol is 3000.

4. The construction process of an anti-static polyurethane mortar self-leveling floor according to claim 1 is characterized in that: The molecular weight of the polyethylene adipate is 1000.

5. The construction process of an anti-static polyurethane mortar self-leveling floor according to claim 1 is characterized in that: The aggregate is a machine-made sand mixture, which is compounded from coarse machine-made sand, medium machine-made sand and fine machine-made sand.

6. The construction process of the anti-static polyurethane mortar self-leveling floor according to claim 5 is characterized by: The mass ratio of the coarse machine-made sand, the medium machine-made sand and the fine machine-made sand is 2:3:

5.

7. The construction process of the anti-static polyurethane mortar self-leveling floor according to claim 6 is characterized by: The particle size of the coarse machine-made sand is 0.5-1 mm, the particle size of the medium machine-made sand is 0.25-0.5 mm, and the particle size of the fine machine-made sand is 0.125-0.25 mm.

8. The construction process of the anti-static polyurethane mortar self-leveling floor according to claim 7 is characterized by: The preparation method of the machine-made sand mixture is as follows: Step 01) Mix marble powder, talcum powder, wollastonite powder, cement and water to form a mixture; Step 02), the mixed material is poured into the mold and cured to form a concrete block; Step 03), crushing and screening the concrete blocks to obtain coarse machine-made sand, medium machine-made sand, and fine machine-made sand; Step 04), mixing coarse machine-made sand, medium machine-made sand and fine machine-made sand in proportion to obtain a machine-made sand mixture; The mass ratio of the marble powder, talcum powder, wollastonite powder, cement and water is 5.14:3:3.55:3.39:

1. 9.An anti-static polyurethane mortar self-leveling floor, characterized by: The antistatic polyurethane mortar self-leveling floor is prepared by the construction process of any one of claims 1-8.

Images