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Preparation method of polyurethane modified epoxy resin and grouting material based on resin

A technology of epoxy resin grouting and polyurethane modification, which is applied in the field of building materials, can solve the problems of slow curing, poor toughness, and low wet bonding strength, and achieve the effects of low curing strength at low temperature, reduced force, and high resin viscosity

Active Publication Date: 2015-01-14
BEIJING TIEKE SHOUGANG RAIL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the polyurethane graft modified epoxy resin interpenetrating network polymer grouting material prepared by the prior art scheme has the problems of poor toughness, slow curing, and low wet bonding strength, thus proposing a low-strength Preparation method of polyurethane modified epoxy resin with good viscosity, good toughness, fast curing and high wet bonding strength and grouting material based on the resin

Method used

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  • Preparation method of polyurethane modified epoxy resin and grouting material based on resin

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Experimental program
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Embodiment 1

[0027] A kind of polyurethane modified epoxy resin is provided in the present embodiment, and the raw material composition of described polyurethane modified epoxy resin is as follows:

[0028] Epoxy resin E51, 60 parts by weight of epoxy value 0.6mol / 100g; Toluene diisocyanate, 18 parts by weight; Catalyst dibutyltin dilaurate, 0.05 parts by weight; Diluent benzyl glycidyl ether, 50 parts by weight; Plasticizer dioctyl phthalate, 10 parts by weight; Inorganic toughening agent talcum powder, 20 parts by weight.

[0029] The preparation method of described polyurethane modified epoxy resin is:

[0030] (a) under vacuum conditions, 50wt% of the epoxy resin, that is, 30 parts by weight of the epoxy resin, is first heated to 100°C, stirred for 2h, and then cooled to 50°C;

[0031] (b) adding the above-mentioned isocyanate and catalyst in the epoxy resin described in step (a), and reacting for 3 hours in an inert gas at a temperature of 80° C. to obtain a polyurethane grafted epox...

Embodiment 2

[0038] A kind of polyurethane modified epoxy resin is provided in the present embodiment, and the raw material composition of described polyurethane modified epoxy resin is as follows:

[0039] Epoxy resin E44 with an epoxy value of 0.4mol / 100g, 80 parts by weight; Hexamethylene diisocyanate, 10 parts by weight; Catalyst triethylamine, 0.5 parts by weight; Diluent ethylene glycol glycidyl ether, 10 parts by weight ; Plasticizer diethyl phthalate, 20 parts by weight; Inorganic toughening agent fumed silica, 5 parts by weight.

[0040] The preparation method of described polyurethane modified epoxy resin is:

[0041] (a) under vacuum conditions, 40wt% of the epoxy resin, that is, 32 parts by weight of the epoxy resin, is first heated to 110°C, stirred for 1h, and then cooled to 60°C;

[0042] (b) adding isocyanate and a catalyst to the epoxy resin described in step (a), and reacting for 1 h in an inert gas at a temperature of 90° C. to obtain a polyurethane grafted epoxy resin;...

Embodiment 3

[0049] A kind of polyurethane modified epoxy resin is provided in the present embodiment, and the raw material composition of described polyurethane modified epoxy resin is as follows:

[0050] Epoxy resin E44 with an epoxy value of 0.45mol / 100g, 70 parts by weight; Dicyclohexylmethane diisocyanate, 25 parts by weight; Catalyst stannous octoate, 0.2 parts by weight; Thinner o-cresol glycidyl ether, 30 parts by weight ; Plasticizer epoxy dioctyl tetrahydrophthalate, 15 parts by weight; Inorganic toughening agent fumed silica, 5 parts by weight.

[0051] The preparation method of described polyurethane modified epoxy resin is:

[0052] (a) under vacuum conditions, 60wt% of the epoxy resin, that is, 42 parts by weight of the epoxy resin, is first heated to 110°C, stirred for 1h, and then cooled to 60°C;

[0053] (b) adding isocyanate and a catalyst to the epoxy resin described in step (a), and reacting for 1 h in an inert gas at a temperature of 90° C. to obtain a polyurethane g...

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Abstract

The invention provides a preparation method of polyurethane modified epoxy resin. The preparation method comprises the following steps: firstly performing reaction on isocyanate and a hydroxyl group on epoxy resin to obtain polyurethane graft epoxy resin, further terminating isocyanate on the polyurethane graft epoxy resin with monohydric alcohol, and further grafting a polyurethane short branch chain on the epoxy resin by utilizing the unit termination of isocyanate so as to increase the intermolecular distance of the epoxy resin, reduce the intermolecular action force, improve the motion ability of a chain segment and simultaneously realize the effects of reducing viscosity of slurry and toughening; furthermore, a grouting material based on the polyurethane modified epoxy resin provided by the invention can effectively reduce the intermolecular physical crosslinking and realize strong permeability and good toughness; data shows that the compressive strength exceeds 70MPa, the tensile strength is more than 20MPa, the dry bonding strength is more than 5MPa, and the wet bonding strength is more than 3MPa.

Description

technical field [0001] The invention relates to a preparation method of polyurethane modified epoxy resin and a grouting material based on the resin, belonging to the technical field of building materials. Background technique [0002] Epoxy resin has the characteristics of high bonding strength, can be cured at room temperature, small shrinkage rate of cured products, excellent mechanical properties and good corrosion resistance, etc. It is widely used as adhesives, coatings, grouting materials, etc. in electronics, machinery, and civil engineering and many other fields. Epoxy resin grouting is to use epoxy resin as the main agent, add a certain diluent and curing agent to prepare epoxy resin grouting slurry, and then use grouting equipment to pour it into the formation cracks and concrete cracks under certain process conditions In order to achieve anti-seepage plugging and reinforcement of the poured body, so that the building can operate safely. Epoxy resin grouting mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08L63/00C08G18/65C08G18/58C08G59/62
Inventor 杨富民刘志马荣田张远庆陈玉琪张雯
Owner BEIJING TIEKE SHOUGANG RAIL TECH CO LTD
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