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Polyurethane-modified daub for leaking stoppage

A technology of polyurethane modification and plugging glue, applied in the field of polyurethane materials, can solve the problems of easy crack expansion, strong odor and high corrosion, and achieve the effect of ensuring repairing effect, good operation safety and fast curing speed.

Active Publication Date: 2016-06-22
YIXIANG BLOW MOLDING FURNITURE (NINGBO) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, acrylate mastic cures faster, but the cured product is brittle, prone to cracks, strong odor, high toxicity, not environmentally friendly, not alkali resistant, more corrosive to opponents, and difficult to operate; epoxy resin mastic has high bonding strength , but the cured product is brittle and prone to cracks, and the cracks are easy to expand. At the same time, the curing speed and low-temperature curing performance need to be improved

Method used

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  • Polyurethane-modified daub for leaking stoppage
  • Polyurethane-modified daub for leaking stoppage
  • Polyurethane-modified daub for leaking stoppage

Examples

Experimental program
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Effect test

Embodiment

[0030] 1. Preparation of component A

[0031] Add polyether to the reaction kettle, heat to 115-120°C, vacuum dehydrate for 2 hours, cool down and set aside;

[0032] Add polyether to the reaction kettle, heat to 115-120°C, vacuum dehydrate for 2 hours, and obtain dehydrated polyether after cooling;

[0033] Add polyisocyanate to the reaction kettle, heat to 60°C, stir, then add the dehydrated polyether, the weight ratio of the polyisocyanate to the dehydrated polyether is 100:5-20, keep warm at 80°C, when the reaction material NCO in - When the group content is 5%, the reaction is stopped, and the prepolymer is obtained after cooling;

[0034] Add the epoxy resin to the reaction kettle, the weight ratio of the epoxy resin to the prepolymer is 100:5-20, then add the prepolymer, react at 80°C for 3 hours, discharge, and cool to 40°C ℃ or below, to obtain polyurethane modified epoxy resin.

[0035] Add diethylene glycol to the polyurethane modified epoxy resin, stir evenly, ...

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Abstract

The invention discloses polyurethane-modified daub for leaking stoppage. The daub comprises a component A, a component B and a component C in the total weight part ratio being 100: (40-60): (5-20), wherein the component A is prepared from polyurethane-modified epoxide resin, mica powder Al2O3 and diethylene glycol; the component B is prepared from diethylenetriamine, a single epoxy compound, a DMP (dimethyl phthalate)-30 catalyst and colloidal graphite; the component C is prepared from thiourea or a thiourea derivative, CaO and / or Ca(OH)2 and 8-hydroxyquinoline. Compared with the prior art, the provided polyurethane-modified daub for leaking stoppage has good toughness, can effectively prevent propagation of cracks in a pipe, guarantees the repairing effect and can stop leakage at the temperature and under pressure, cracks of equipment can be prevented through coating in advance, the curing speed of the daub in winter is high, the material is environment-friendly, no side effects and odors are produced, and the operation safety is good.

Description

technical field [0001] The invention belongs to polyurethane material technology, in particular to a polyurethane modified plugging cement. Background technique [0002] Plugging cement is used in power plants, oil refineries, chemical plants, chemical fertilizer plants, chemical fiber plants, steel plants, pharmaceutical plants, printing and dyeing plants, paper mills, heating, gas supply (coal gas, liquefied petroleum gas, etc.), water supply and drainage systems, storage It is an excellent material for plugging leakage of equipment, pipes, valve flanges, various parts of pipes, wall of equipment, self-sealing valves, bonnets, valve bodies, threaded joints, pipes and flanges in food industry and other industries. , to ensure the tightness of the pipeline and ensure production safety. [0003] Existing plugging cement mainly contains acrylate cement and epoxy resin cement. Among them, acrylate mastic cures faster, but the cured product is brittle, prone to cracks, strong ...

Claims

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Application Information

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IPC IPC(8): C09J175/08C09J11/04C09J11/06C08G18/48C08G18/58C08G18/10C04B26/16C09K3/12
CPCC04B26/16C08G18/10C08G18/4045C08G18/48C08G18/58C08K3/04C08K3/22C08K3/34C08K5/06C08K5/405C08K13/02C08K2003/2227C08K2201/005C09J11/04C09J11/06C09J175/08C09K3/12C04B14/20C04B14/303C04B24/02C04B24/121C04B24/023C04B14/024C04B22/064C04B24/126C04B24/128C04B2103/10
Inventor 师伟李晓东伊世香周莉莉蔡卫民
Owner YIXIANG BLOW MOLDING FURNITURE (NINGBO) CO LTD
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