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Environment-friendly polyurethane water shutoff material and preparation method thereof

A polyurethane, environment-friendly technology, applied in the field of environment-friendly polyurethane water blocking materials and its preparation, can solve problems such as poor reinforcement and complicated operation, and achieve low steam pressure, good permeability, adjustable foaming speed and curing speed Effect

Active Publication Date: 2014-04-02
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although water-soluble polyurethane has good anti-seepage and water-proof effect, its reinforcement is poor
Elastic polyurethane is a two-liquid grouting material, and the operation is more complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of polyurethane prepolymer: Polyether polyol a (functionality 3, hydroxyl value 370) 15kg, polyether polyol b (functionality 2, hydroxyl value 380) 5kg, polyether polyol c (functionality 2.7, Hydroxyl value 167) 2kg, vacuum dehydration at 120°C for 2.5 hours, lower the temperature to 45°C, add to the synthesis reaction kettle, protect with nitrogen, add 0.1kg of dewatering agent ALT-201 (Anxiang Ailite Chemical Industry), while stirring Slowly add 50kg of polyphenyl polymethylene polyisocyanate PM200 (Yantai Wanhua), raise the temperature to 80°C, and react for 2.5 hours. The synthesis reaction is completed. After sampling and detection, the NCO content in the system will no longer decrease, and the polyurethane prepolymer can be obtained. body;

[0038] Preparation of additives: Add 3kg of dibutyl phthalate, 5kg of tributyl citrate, 3kg of tris(1-chloro-2-propyl) phosphate, 0.3kg of dibutyltin dilaurate, bismorpholino diethyl Base ether 0.5kg, H-3625 (Zhon...

Embodiment 2

[0043] Preparation of polyurethane prepolymer: polyether polyol a (functionality 3, hydroxyl value 450) 25kg, polyether polyol b (functionality 2, hydroxyl value 280) 10kg, polyether polyol c (functionality 2. Hydroxyl value 110) 5kg, vacuum dehydrate at 110°C for 3 hours, cool down to 40°C, add to the synthesis reaction kettle, protect with nitrogen, add 0.5kg of dewatering agent ALT-201 (Anxiang Elite Chemical), Slowly add 50kg of polyphenylpolymethylene polyisocyanate PM200 (Yantai Wanhua) and 25kg of polyphenylpolymethylene polyisocyanate M20S (BASF) while stirring, raise the temperature to 85°C, and react for 2.0 hours, the synthesis reaction is completed , after sampling and testing the NCO content in the system is qualified, the polyurethane prepolymer can be obtained;

[0044] Additives: Add dioctyl phthalate 10kg, triethyl citrate 15kg, triethyl phosphate 5kg, bismorpholino diethyl ether 1kg, stannous octoate 1kg, H-3971 (Zhongshan Shandong Jun Chemical) 3kg , stirri...

Embodiment 3

[0049] The polyurethane prepolymer is made of the following raw materials in parts by weight: 15-25 parts of polyether polyol a, 5-10 parts of polyether polyol b, 2-5 parts of polyether polyol c, 0.1-0.5 parts of water remover, isocyanate 50-75 copies;

[0050] Polyether polyol a has a functionality of 3-4 and a hydroxyl value of 300-500.

[0051] Polyether polyol b has a functionality of 2-3 and a hydroxyl value of 200-400.

[0052] The polyether polyol has a C functionality of 2-3 and a hydroxyl value of 100-200;

[0053] The additive is made of the following raw materials in parts by weight: 3-10 parts of plasticizer, 5-15 parts of diluent, 3-5 parts of flame retardant, 0.3-2 parts of catalyst and 1-3 parts of surfactant.

[0054] Preparation of polyurethane prepolymer: Polyether polyol a (functionality 4, hydroxyl value 500) 20kg, polyether polyol b (functionality 3, hydroxyl value 200) 8kg, polyether polyol c (functionality 3, Hydroxyl value 200) 4kg, vacuum dehydratio...

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Abstract

The invention belongs to the field of high polymer materials and particularly relates to an environment-friendly polyurethane water shutoff material. The environment-friendly polyurethane water shutoff material is prepared from a polyurethane prepolymer and an additive, wherein the polyurethane prepolymer is prepared from the following raw materials: polyethylene-polypropylene glycol a (functionality: 3-4 and hydroxyl value: 300-500), polyethylene-polypropylene glycol b (functionality: 2-3 and hydroxyl value: 200-400), polyethylene-polypropylene glycol c (functionality: 2-3 and hydroxyl value: 100-200), a water remover and isocyanate; the additive is prepared from the following raw materials: a plasticizing agent, a diluent, a flame retardant, a catalyst and a surfactant. When being injected to a hole or crack, the polyurethane water shutoff material is diffused and solidified in the crack to generate foam with certain strength; molecules of a gel contain a great number of polar groups, so that the environment-friendly polyurethane water shutoff material is high in bonding strength and capable of shutting off the crack, thus playing the water shutoff and consolidation effects. The invention also provides a preparation method of the environment-friendly polyurethane water shutoff material. The preparation method is reasonable in process and easy for industrial production.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to an environment-friendly polyurethane water blocking material and a preparation method thereof. Background technique [0002] Various waterproof concretes have been widely used in underground engineering, but they are prone to leakage after long-term use. In newly excavated underground projects, sometimes a large amount of groundwater gushes out, especially in underground projects constructed in rocks. Groundwater can cause serious damage to underground projects through rock cracks. If the water is not stopped first at this time, Work will not be carried out. [0003] The chemical grouting plugging technology is to pump the slurry made of chemicals into the concrete structure joints, and play the role of water plugging after condensation and hardening. The grouting water blocking method has its important significance in underground engineering, and has become an indi...

Claims

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Application Information

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IPC IPC(8): C08L75/08C08G18/76C08G18/48C08G18/12C08K5/11C08K5/101C08K5/521C08G101/00
Inventor 王艳艳唐国涛张丽郝德开宫健
Owner SHANDONG INOV NEW MATERIALS CO LTD
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