Hydrophobic polyurethane grouting material

Abstract

The invention relates to a two-component hydrophobic polyurethane grouting material which is characterized in that the grouting material is composed of a component A and a component B according to the volume ratio of 1: 1, and the component A is prepared from the following raw materials in parts by weight: 50-100 parts of polybutadiene glycol HTPB, 0-30 parts of sucrose or sorbitol starting polyether polyol, 0.1-5 parts of diethanol amine, 0.5-1 part of a silicone surfactant, 0.1-0.5 part of organic tin, and 0.1-0.5 part of N, N-dimethylformamide. The raw materials comprise, by weight, 0.1-1 part of N, N-dimethyl benzylamine, 2-10 parts of dibutyl phthalate and 0.5-2 parts of water, and the total weight of the raw materials is 100 parts; and the component B is polymethylene polyphenyl polyisocyanate. The two components are mixed and then are grouted to form highly hydrophobic polyurethane, the highly hydrophobic polyurethane has good permeability, a cured condensate is high in strength and firm in concrete bonding, a solidified part is excellent in permeability resistance, and the highly hydrophobic polyurethane can be suitable for repairing diseases such as cavities and cracks of a highway pavement base layer, subsidence of a bridge engineering access slab and the like, and can also be used for mineral exploitation, building construction and the like. And underwater construction engineering waterproof treatment reinforcement and water leakage and permeable fault emergency repair treatment are carried out.

Description

Technical Field

[0001] The invention relates to a two-component polyurethane grouting material, in particular to a highly hydrophobic grouting material used for repairing holes and cracks in roadbeds and the like. Background Art

[0002] The highway network has made great progress over the years, bringing great convenience to people's lives. In the long-term operation of highways, semi-rigid roadbeds are prone to lateral reflection cracks, longitudinal cracks in the roadbed, and joints between new and old pavements. After the cracks are formed, under the influence of external environments such as temperature changes, rain erosion, and heavy vehicle loads, roadbed cavities, cracks and other diseases are easily formed. If the cavities are not handled in time, they may cause road collapse, greatly shortening the service life of the highway and leaving serious safety hazards. At present, the roadbed can be repaired by digging up the cracked road surface and refilling it. The maintenance cycle is long, laborious, labor-intensive, and the maintenance cost is high. In view of the above reasons, polyurethane polymer grouting materials were invented and promoted. The cavity is filled by using the rapid expansion of the volume of polyurethane after chemical reaction, avoiding roadbed excavation and greatly shortening the maintenance cycle. However, during the polyurethane grouting process, since there is often water in the cavities or gaps, the polyurethane will mix and react with or wrap the water in the gaps, and the water in the pores cannot be squeezed out and filled smoothly, resulting in a decrease in the performance of the polyurethane polymer formed by the grouting and the strength is lower than expected. Summary of the invention

[0003] In order to overcome the problems existing in the above-mentioned prior art, the present invention provides a two-component polyurethane grouting material. The formed polyurethane is highly hydrophobic, and naturally separates with water during the grouting process without mixing with water. Water is discharged during the grouting process to form a controllable polyurethane strength. The material can be widely used in the repair of defects such as holes and cracks in the base of highway pavement and subsidence of bridge engineering cladding. It can also be used in mineral mining, waterproofing and reinforcement of underwater construction projects, and emergency repair of leaks and water seepage.

[0004] The technical solution of the present invention is as follows: A two-component hydrophobic polyurethane grouting material, the grouting material is composed of component A and component B in a volume ratio of 1:1: the component A is made of the following raw materials in proportion by weight: 50-100 parts of polybutadiene glycol HTPB, 0-30 parts of sucrose or sorbitol starting polyether polyol, 0.1-5 parts of diethanolamine, 0.5-1 part of silicone surfactant, 0.1-0.5 parts of organic tin, 0.1-1 part of N,N-dimethylbenzylamine, 2-10 parts of dibutyl phthalate, 0.5-2 parts of water, and a total of 100 parts; the component B is polymethylene polyphenyl polyisocyanate.

[0005] The polybutadiene glycol HTPB of the present invention has a hydroxyl value of 0.4 to 1.4 mmol / g, preferably 0.6 to 1.2 mmol / g.

[0006] The polybutadiene glycol HTPB described in the present invention is used in an amount of 50 to 100 parts, preferably 60 to 90 parts.

[0007] The sucrose or sorbitol-started polyether polyol of the present invention has a hydroxyl value of 300-700 mgKOH / g, preferably 400-600 mgKOH / g.

[0008] The sucrose or sorbitol starting polyether polyol of the present invention is used in an amount of 0 to 40 parts, preferably 0 to 30 parts.

[0009] The diethanolamine used in the present invention is 0.1 to 5 parts, preferably 0.5 to 4 parts.

[0010] The silicone surfactant described in the present invention is 0.5 to 1 part.

[0011] The organic tin catalyst of the present invention is 0.1 to 0.5 parts.

[0012] The N,N-dimethylbenzylamine of the present invention is 0.1 to 1 part.

[0013] The dibutyl phthalate of the present invention is 2 to 10 parts.

[0014] The polymethylene polyphenyl polyisocyanate of the present invention has an NCO content of 30-32wt%, preferably one or two or more selected from Suprasec 5005 and Suprasec 2085 of Huntsman Chemical, M 20S and M 40S of BASF Chemical, 44V and 44V70 of Covestro Materials, PAPI27 of Dow Chemical, PM-200 and PM-400 of Wanhua Chemical.

[0015] The present invention adopts a two-component grouting device, adjusts the ratio of component A and component B to 1:1, and injects the materials after mixing them in a closed manner through a grouting mixer. The generated polyurethane is highly hydrophobic, and naturally separates from water during the grouting process without mixing with water. During the grouting process, water is discharged to form a controllable polyurethane strength, which can be widely used in repairing defects such as holes and cracks in the base of highway pavement, and sinking of bridge engineering slabs. It can also be used in mineral mining, waterproofing and reinforcement of underwater construction projects, and emergency repair of leaks and water seepage. Implementation

[0016] The following examples further illustrate the preparation process and use process of the present invention, as well as the implementation effects. The specific selection of components and the like in the following examples does not mean to limit the scope of the present invention. Example

[0017] Prepare the following formula composition component A Tianyuan Aviation Materials HTBP II Type 85.3 Ningwu Chemical NJ 3628 10 Dow Diethanolamine 0.5 Dongjun Chemical H 3601 1 Evonik T12 catalyst 0.2 Evonik N,N-dimethylbenzylamine 0.5 Qilu Chemical Dibutyl Phthalate 2 Water content 0.5 Total Quantity 100 Component B Huntsman Suprasec 5005 System 1 Example

[0018] Prepare the following formula to form component A Tianyuan Aviation Materials HTBP IV Type 75.3 Ningwu Chemical NJ 6209 20 Dow Diethanolamine 0.5 Dongjun Chemical H 3601 1 Evonik T12 catalyst 0.2 Evonik N,N-dimethylbenzylamine 0.5 Qilu Chemical Dibutyl Phthalate 2 Water content 0.5 Total Quantity 100 Component B Covestro 44V20 System 2 Example

[0019] Tianyuan Aviation Materials HTBP II Type 81.8 Ningwu Chemical NJ 3628 5 Dow Diethanolamine 0.5 Dongjun Chemical H 3601 1 Evonik T12 catalyst 0.2 Evonik N,N-dimethylbenzylamine 0.5 Qilu Chemical Dibutyl Phthalate 10 Water 1 Total Quantity 100 Component B BASF M20S System 3 Example

[0020] Tianyuan Aviation Materials HTBP IV Type 74.3 Ningwu Chemical NJ 6209 15 Dow Diethanolamine 3 Dongjun Chemical H 3601 1 Evonik T12 catalyst 0.2 Evonik N,N-dimethylbenzylamine 0.8 Qilu Chemical Dibutyl Phthalate 5 Water content 0.7 Total Quantity 100 Component B Wanhua Chemical PM 200 System 4 Comparative Example 1 Ningwu Chemical NJ 305 45.8 Ningwu Chemical NJ 3628 50 Dongjun Chemical H 3601 1 Evonik T12 catalyst 0.2 Evonik N,N-dimethylbenzylamine 0.5 Qilu Chemical Dibutyl Phthalate 2 Water content 0.5 Total Quantity 100 Component B Huntsman Suprasec 5005 System 5 Comparative Example 2 Ningwu Chemical NJ 305 49.8 Ningwu Chemical NJ 204 40 Dongjun Chemical H 3601 1 Evonik T12 catalyst 0.2 Evonik N,N-dimethylbenzylamine 0.5 Qilu Chemical Dibutyl Phthalate 8 Water content 0.5 Total Quantity 100 Component B Huntsman Suprasec 5005 System 6 Mix 100ml of the above 6 systems in a volume ratio of 1:1, stir evenly and pour into a 1-liter plastic cup with 500ml of water. Observe the foaming situation and record it as follows System 1 is used in engineering practice. The detection instrument detects the water accumulation in the cracks under the road surface and the size of the holes. After calculation, the cannula is inserted and the grouting operation is performed by a polyurethane sprayer. The A and B materials in the cracks fully discharge the accumulated water in the cracks. The A and B materials react after mixing, expand and harden to repair the cracks and holes. After the repair is completed, the hole is tested and it is fully filled without water accumulation.

[0021] In summary, the two-component system prepared by the method of the present invention overcomes the shortcomings of the original grouting system, is highly hydrophobic, and has good permeability. It can be used to repair holes and cracks in the base of highway pavement, subsidence of bridge engineering slabs and other defects. It can also be used for mineral mining, waterproofing and reinforcement of underwater construction projects, and emergency repair of leaks and water seepage.

[0022] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. A person skilled in the art of the present invention may make several simple modifications, which should be considered to fall within the protection scope of the present invention.

Claims

1. The present invention relates to a two-component hydrophobic polyurethane grouting material, characterized in that: The grouting material is composed of component A and component B in a volume ratio of 1:1: the component A is made of the following raw materials in proportion by weight: 50-100 parts of polybutadiene glycol HTPB, 0-30 parts of sucrose or sorbitol starting polyether polyol, 0.1-5 parts of diethanolamine, 0.5-1 parts of silicone surfactant, 0.1-0.5 parts of organic tin catalyst, 0.1-1 parts of N,N-dimethylbenzylamine, 2-10 parts of dibutyl phthalate, and a total of 100 parts; the component B is polymethylene polyphenyl polyisocyanate.

2. The hydrophobic polyurethane component A according to claim 1, characterized in that The amount of the polybutadiene glycol HTPB is 50 to 100 parts.

3. The polybutadiene glycol HTPB according to claim 2, characterized in that The hydroxyl value of the polybutadiene glycol HTPB is 0.4-1.4 mmol / g.

4. The sucrose or sorbitol starting polyether polyol according to claim 1, characterized in that: The amount of sucrose or sorbitol starting polyether polyol used is 0 to 30 parts.

5. The sucrose or sorbitol starting polyether polyol according to claim 1, characterized in that: The hydroxyl value of the sucrose or sorbitol starting polyether polyol is 300-600 mgKOH / g.

6. The method for using the two-component grouting material according to claim 1, characterized in that When using, mix according to the volume ratio of 1:1, and then use a grouting pump to inject into the gaps or holes to be filled for solidification.

7. The two-component hydrophobic grouting material according to claim 1 can be used to repair holes and cracks in the base of highway pavement, sinking of bridge engineering slabs and other defects, and can also be used for mineral mining, waterproofing and reinforcement of underwater construction projects, and emergency repair of leaks and water seepage.