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Novel modified epoxy resin adhesive for construction and preparation method thereof

A technology for epoxy resin and construction, applied in the direction of epoxy resin glue, adhesive, polymer adhesive additive, etc., it can solve the problems of complicated construction, unsatisfactory compressive strength, slow curing rate, etc. The effect of sagging distance, shortening gel time and improving construction efficiency

Active Publication Date: 2021-05-28
北京新时代寰宇科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Concrete adhesives currently on the market have the following deficiencies: 1. The use of cement or cement mortar adhesives has problems such as low bonding strength and serious shrinkage cracking
2. The use of styrene-acrylic, pure acrylic or silicon-acrylic emulsion adhesives has problems such as high viscosity, poor fluidity, complicated construction, and low adhesion.
3. The use of EP adhesives has problems such as poor durability and high brittleness, and EP needs to be modified
[0005] Because concrete structures often need to use high-strength EP adhesives in the processes of splicing, repairing, and reinforcement, the currently commonly used E-44 and E-51EP are highly sensitive to temperature (easy to crystallize at low temperature, easy to hang at high temperature)
Especially in winter construction (below 10°C), it is often necessary to preheat before compounding, which is cumbersome to operate, and the curing rate of EP is slow in low temperature environment, and the early (1d) compressive strength cannot meet the requirements

Method used

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  • Novel modified epoxy resin adhesive for construction and preparation method thereof
  • Novel modified epoxy resin adhesive for construction and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Adhesive 1 was obtained according to the following preparation method:

[0032] 1) Carboxyl-terminated nitrile rubber (CTBN) is preheated at 60-70°C for 0.5-1.0 hours before use, and then weigh 5 parts of preheated carboxyl-terminated nitrile rubber (CTBN) and 100 parts of epoxy resin (EP ), add it into the reactor with a stirrer and a thermometer, control the speed of the stirrer at 400-600r / min, stir the reactant evenly, add the accelerator 2,4,6-tri-( Dimethylaminomethyl) phenol (DMP-30) 3.2 parts, stop heating after reacting for 2.0 to 6.0 hours to obtain a modified CTBN / EP matrix.

[0033] 2) Dry mix 100 parts of cement and 170 parts of filler A in advance according to the proportion, and then add it to the reactor of the modified CTBN / EP matrix in step 1), and then add 15 parts of curing agent and 45 parts of water repellent , 10 parts of diluent, 2 parts of coupling agent and 1.6 parts of defoamer were fully stirred and mixed to obtain adhesive 1.

[0034] The ...

Embodiment 2

[0036] Adhesive 2 was obtained according to the following preparation method:

[0037] 1) Preheat carboxy-terminated nitrile rubber (CTBN) at 60-70°C for 0.5-1.0 hours before use, then weigh 30 parts of preheated carboxyl-terminated nitrile rubber (CTBN) and 100 parts of epoxy resin (EP ), add it into the reactor with a stirrer and a thermometer, control the speed of the stirrer at 400-600r / min, stir the reactant evenly, add the accelerator 2,4,6-tri-( Dimethylaminomethyl) phenol (DMP-30) 0.8 parts, stop heating after reacting for 2.0 to 6.0 hours to obtain a modified CTBN / EP matrix.

[0038] 2) Dry mix 170 parts of cement and 85 parts of filler A in advance according to the proportion, and then add it to the reactor of the modified CTBN / EP matrix in step 1), and then add 45 parts of curing agent and 30 parts of water repellent , 15 parts of diluent, 0.5 part of coupling agent and 0.2 part of defoamer were fully stirred and mixed to obtain adhesive 2.

[0039] The composition ...

Embodiment 3

[0041] Adhesive 3 was obtained according to the following preparation method:

[0042] 1) Preheat carboxy-terminated nitrile rubber (CTBN) at 60-70°C for 0.5-1.0 hours before use, then weigh 20 parts of preheated carboxyl-terminated nitrile rubber (CTBN) and 100 parts of epoxy resin (EP ), add it into the reactor with a stirrer and a thermometer, control the speed of the stirrer at 400-600r / min, stir the reactant evenly, add the accelerator 2,4,6-tri-( Dimethylaminomethyl) phenol (DMP-30) 2.5 parts, stop heating after reacting for 2.0-6.0 hours, and obtain a modified CTBN / EP matrix.

[0043] 2) Dry mix 100 parts of cement and 155 parts of filler A in advance according to the proportion, and then add it to the reactor of the modified CTBN / EP matrix in step 1), and then add 20 parts of curing agent and 40 parts of water repellent , 11 parts of diluent, 1 part of coupling agent and 1 part of defoamer were fully stirred and mixed to obtain adhesive 3.

[0044] The composition of...

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Abstract

The invention discloses a novel modified epoxy resin adhesive for construction and a preparation method thereof, belonging to the field of construction, comprising the following raw materials in percentage by weight: 100 parts of epoxy resin, 5 to 30 parts of toughening agent, and 15 to 45 parts of curing agent 0.8-3.2 parts of accelerator, 100-170 parts of cement, 80-170 parts of filler A, 30-45 parts of water repellent, 10-15 parts of thinner, 0.5-2.0 parts of coupling agent, 0.2-10 parts of defoamer 1.6 servings. The modified epoxy resin adhesive of the present invention can not only solve various problems existing in various types of adhesives on the market by modifying epoxy resin, but also using cement and filler A as main additives, and cooperating with curing agent, accelerator and other auxiliary agents. Problems (such as low bond strength, easy cracking, etc.), can also adapt to the construction requirements of low temperature environment in winter. Under low temperature conditions, no preheating is required before glue mixing, and there is no sagging in vertical construction, and the early strength is high.

Description

technical field [0001] The invention relates to the construction field, in particular to a novel modified epoxy resin adhesive for construction and a preparation method thereof. Background technique [0002] Epoxy resin (EP) is a thermosetting plastic that can be used as coatings, composite materials, adhesives, molding materials and injection molding materials, etc. In addition to poor adhesion to non-polar plastics such as polyolefins, EP has excellent adhesion to various metal materials such as aluminum, iron, copper, etc. and non-metallic materials such as glass, wood, concrete, etc., as well as thermosetting plastic stools. performance. In addition, EP adhesives also have good water resistance, corrosion resistance (especially alkali corrosion), insulation and sealing properties, etc., but EP has shortcomings such as heat resistance, poor weather resistance, and high brittleness, which need to be improved. properties to improve performance. [0003] EP adhesives for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J163/00C09J11/04C09J11/06C09J11/08C08G59/42
CPCC08G59/4253C08K2201/014C08L2205/025C08L2205/03C09J11/04C09J11/06C09J11/08C09J163/00C08L83/04C08K13/04C08K7/12C08K3/36C08K3/34
Inventor 张迎新杨李宁胡宝苓田俊岭杨康
Owner 北京新时代寰宇科技发展有限公司
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