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Two-component polyurethane cement plugging glue, and preparation and application thereof

A two-component polyurethane and polyurethane polymer technology, applied in polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as poor toughness, incomplete sealing of small gaps, and corrosion of reinforced concrete. Achieve the effects of fast curing speed, good compression resistance, and high bonding cement strength

Inactive Publication Date: 2017-09-26
SHANGHAI HECHENG POLYMER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it also has the incomplete sealing of small gaps, and the product contains a large amount of chloride, which will corrode reinforced concrete to a certain extent, and its poor toughness can only be used in non-elastic structures.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) The preparation method of polyurethane polymer:

[0030] Take 200KG polyether diol GE-220 and 200KG polyether triol GEP-330NG into the reaction kettle, stir evenly, heat up to 90-110°C for vacuum dehydration for 1-2 hours. After dehydration, lower the temperature to 60-70°C, add carbodiimide-modified diphenylmethylene diisocyanate 200KG, MDI 200KG, and react at 70-80°C for 2 hours.

[0031] After the reaction, add 200KG polyaryl polymethylene isocyanate, add 480KG carbodiimide modified diphenylmethylene diisocyanate, add 500KG TCPP and stir for 0.5 hours, test the NCO content, and the NCO content should be 11.5%. Viscosity at 25°C is 850cpas.

[0032] After passing the test, add 20KG of dehydrated and dried meteorological silica, and disperse at high speed. filter pack. A polyurethane polymer component is obtained.

[0033] (2) preparation method of water glass curing agent:

[0034] Take 60KG sodium silicate and add 40KG pure deionized water, stir until comple...

Embodiment 2

[0037] (1) The preparation method of polyurethane polymer:

[0038] Take 300KG polyether diol GE-220 and 100KG polyether triol GEP-330NG into the reaction kettle, stir evenly, heat up to 90-110°C for vacuum dehydration for 1-2 hours. After dehydration, lower the temperature to 60-70°C, add carbodiimide-modified diphenylmethylene diisocyanate 200KG, and MDI 200KG to react at 70-80°C for 2 hours.

[0039] After the reaction, add 500KG polyaryl polymethylene isocyanate, add 280KG carbodiimide modified diphenylmethylene diisocyanate, add 400KG TCPP and stir for 0.5 hour, test NCO content, NCO content should be 13.6%. Viscosity at 25°C is 650cpas.

[0040] After passing the test, add 20KG of dehydrated and dried meteorological silica, and disperse at high speed. filter pack. A polyurethane polymer component is obtained.

[0041] (2) preparation method of water glass curing agent

[0042] Take 60KG sodium silicate and add 40KG pure deionized water, stir until completely dissolv...

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PUM

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Abstract

The invention relates to two-component polyurethane cement plugging glue, and preparation and application thereof. The two-component polyurethane cement plugging glue comprises a polyurethane polymer and a sodium silicate curing agent, wherein the polyurethane polymer and the curing agent are in the mass ratio of 3:1 to 5:1. The two-component polyurethane cement plugging glue is prepared by mixing the polyurethane polymer and the sodium silicate curing agent. The two-component polyurethane cement plugging glue is used for quickly plugging cement fissures, cracks, splitting seams and the like, and can also be compounded and used with glass fibre cloth for sewage pipeline and treatment pond hole repairing and water seepage plugging. The two-component polyurethane cement plugging glue has the characteristics of easiness in use, high curing speed, low viscosity, capacity of directly performing crack treatment and the like, and further has the characteristics of high hydrolysis resistance, pressure resistance, high cement adhering strength, environment friendliness, non-toxicity and the like.

Description

technical field [0001] The invention belongs to the field of sealing glue and its preparation and application, in particular to a two-component polyurethane cement sealing glue and its preparation and application. Background technique [0002] During the use of cement pipelines, cement water storage tanks, treatment tanks, etc., water seepage and cracks sometimes occur. If they are not repaired in time, the pipes may be broken and water leakage may be more serious. If the water is completely drained and repaired, normal production will also be affected. operate. [0003] At present, the domestic plugging market mainly uses two plugging methods, one is ordinary cement grouting plugging, the other is portland cement and calcium chloride, lithium chloride, zinc stearate, hydroxypropyl cellulose, Mixed with water agent etc. to form fast curing cement. The former is the traditional method, which requires water cutoff and normal pressure plugging and repair, and the bond strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/04C08G18/48C08G18/76C08K3/36
CPCC08G18/4812C08G18/7671C08K3/32C08K3/34C08K3/36C08K2003/329C09J11/04C09J175/08
Inventor 赵朝阳齐文斌董雨磊
Owner SHANGHAI HECHENG POLYMER TECH CO LTD
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