Environment-friendly water-soluble polyurethane chemical grouting material and preparation method thereof

A water-soluble polyurethane and chemical grouting technology, which is applied in the field of polyurethane compositions, can solve the problems of natural environmental pollution and high toxicity, and achieve the effect of being friendly to the human body and the environment and having good hydrophilicity

Inactive Publication Date: 2016-06-22
上海正策咨仕信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Toluene and xylene have a pungent smell and high toxicity, which have certain negative effects on construction personnel and the environment. At the same time, the flash points of these three organic solvents are all <60°C, and they are flammable and dangerous chemicals. , The use of each link brings many unsafe factors such as combustion, explosion, poisoning, etc.
It also pollutes the natural environment on which human beings depend

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Prepare environment-friendly polyurethane grouting material of the present invention according to the following steps

[0025] Preparation of prepolymer: under anaerobic and anhydrous conditions, mix polyether and retarder, put them into the reaction kettle, and carry out negative pressure dehydration and degassing treatment for 1.5 to 3 hours under stirring, and then cool down to 10 to 42°C Add toluene diisocyanate, carry out the polymerization reaction at 78-85°C for 2-3 hours, and control the -NCOwt% content of the prepolymer between 20-35% as the reaction end point; the polyether is a hydrophilic poly Ether (EP-4000) and ordinary polyether (N210) are mixed in a ratio of 80 / 20;

[0026] Cool the prepolymer reaction liquid generated in step 1) to 40-50°C, then add 10-50 parts by weight of high boiling point composite solvent and 0.5-3 parts by weight of foam stabilizer polyalkanesiloxane, stir evenly, and then add Benzoyl chloride, Tween 80, catalyst, and diethyl pht...

Embodiment 2

[0029] An environment-friendly water-soluble polyurethane chemical grouting material, the preparation process comprising the following steps:

[0030] Preparation of prepolymer: under anaerobic and anhydrous conditions, mix polyether and retarder, put them into the reaction kettle, carry out negative pressure dehydration and degassing treatment for 1.5 hours under stirring, and add isocyanate after cooling down to 10°C, 78 Under the temperature of ℃, carry out the polymerization reaction for 2 hours, and control the -NCOwt% content of the prepolymer between 20% as the reaction end point; the polyether described is hydrophilic polyether (EP-4000) and common polyether (N210 ) are mixed in a ratio of 80 / 20;

[0031] Cool the prepolymer reaction liquid generated in step 1) to 40°C, then add 10 parts by weight of a high boiling point composite solvent and 0.5 parts by weight of a foam stabilizer, stir evenly, and then add a retarder, surfactant, catalyst, Plasticizer, stir and mix...

Embodiment 3

[0038] An environment-friendly water-soluble polyurethane chemical grouting material is characterized in that the preparation process comprises the following steps:

[0039]Preparation of prepolymer: under anaerobic and anhydrous conditions, mix polyether and retarder, put them into the reaction kettle, carry out negative pressure dehydration and degassing treatment for 3 hours under stirring, add isocyanate after cooling down to 42°C, 85 Under the temperature of ℃, carry out the polymerization reaction for 3 hours, and control the -NCOwt% content of the prepolymer between 35% as the reaction end point; the polyether described is hydrophilic polyether (EP-4000) and common polyether (N210 ) are mixed in a ratio of 80 / 20;

[0040] Cool the prepolymer reaction solution generated in step 1) to 50°C, then add 50 parts by weight of a high boiling point composite solvent and 3 parts by weight of a foam stabilizer, stir evenly, then add a retarder, surfactant, catalyst, Plasticizer, ...

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Abstract

The invention discloses an environment-friendly water-soluble polyurethane chemical grouting material. A preparation method for the environment-friendly water-soluble polyurethane chemical grouting material comprises the following steps: under anaerobic and anhydrous conditions, mixing polyether and a retarder, feeding in a reaction kettle, performing negative-pressure dehydration and degassing treatment for 1.5-3 hours while stirring, cooling to 10-42 DEG C and then adding isocyanate, performing polymerization reaction at 78-85 DEG C for 2-3 hours, controlling the weight percentage (wt%) of -NCO of a prepolymer to be 20-35% as a reaction finishing point, cooling the generated prepolymer reaction liquid to 40-50 DEG C, then adding 10-50 parts by weight of high-boiling-point complex solvent and 0.5-3 parts by weight of foam stabilizer, evenly stirring, then adding a retarder, a surfactant, a catalyst and a plasticizer, and evenly mixing to obtain the environment-friendly water-soluble polyurethane chemical grouting material.

Description

technical field [0001] The invention belongs to the field of polyurethane compositions, and in particular relates to an environment-friendly water-soluble polyurethane chemical grouting material and a preparation method thereof. Background technique [0002] Polyurethane, referred to as polyurethane. The English name is polyurethane, referred to as PU. Macromolecular polymers containing many carbamate groups (-NHCOO-) on the main chain of the polymer structure are collectively called polyurethanes, which are polyadditions of organic diisocyanates or polyisocyanates and dihydroxy or polyhydroxy compounds. made. Polyurethane material is a kind of engineering material with a very wide range of uses. Most of its industrial production is prepared by the reaction of organic isocyanate and a variety of compounds containing terminal hydroxyl groups. According to the different functional groups selected and applied in actual production or the different processing methods, polyuret...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08K5/12C08G18/76C08G18/48C08G18/12
Inventor 杨小波
Owner 上海正策咨仕信息科技有限公司
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