Novel modified epoxy resin adhesive for construction and preparation method thereof

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 ...

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

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