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Epoxy resin composite curing agent capable of being flexibly blended

A technology of epoxy resin and curing agent, applied in the field of epoxy resin curing agent, can solve the problems of poor water resistance, slow curing speed, low viscosity strength, etc., and achieve the effect of safe production environment, moderate curing time and low toxicity

Inactive Publication Date: 2014-03-19
HUNAN MAGPOW ADHESIVE INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally, epoxy resin curing agents are required to be used in a dry environment, but in a humid environment, affected by weather, climate and other characteristics, epoxy resin curing agents that cannot be cured with water usually cannot play their role well
The water-soluble adhesives sold in the market have low viscosity and strength, slow curing speed, poor water resistance, and may freeze in winter, so they are not suitable for construction under humid and low temperature conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of the isolated adduct A)

[0029] Mix 103g of diethylenetriamine (1mol) and 114g of 1,3-cyclohexanedimethylamine (1mol) in a three-necked flask, and raise the temperature to 40°C. After stabilizing at a constant temperature of 40°C for about 10 minutes, shrink 328g of benzyl Glyceryl ether (2 mol) was added dropwise into a three-necked flask over 60 minutes. During the dropping process, it was stably controlled at 40°C-50°C. After the dropwise addition, the temperature was raised to 60°C for 90 minutes of constant temperature reaction, and then separated under reduced pressure to normal pressure. amines with low boiling points. Viscosity: 1040mPa·s. Amine value: 358mgKOH / g;

[0030] Preparation of the isolated adduct B)

[0031] Mix 41.2g of diethylenetriamine (0.4mol), 45.6g of 1,3-cyclohexanedimethylamine (0.4mol) and 160g of modified alicyclic amine (0.6mol) at 40°C and add 188g of Phenol (2mol) and stir evenly, raise the temperature to 50°C and add ...

Embodiment 2

[0034] Embodiment 2: the adduct A) of preparation separation is the same as embodiment 1

[0035] Preparation of the isolated adduct B)

[0036] Mix 6g of ethylenediamine (0.1mol), 51.5g of diethylenetriamine (0.5mol), 45.6g of 1,3-cyclohexanedimethylamine (0.4mol) and 50g of modified alicyclic amine (0.2mol) at 40°C Mix evenly, raise the temperature to 45°C, add 188g phenol (2mol) and stir evenly, raise the temperature to 50°C, add 144g n-butylaldehyde (2mol) dropwise React at a constant temperature between 45°C and 55°C for 120 minutes, then raise the temperature to 105°C, control the temperature between 105°C and 110°C, and react at a constant temperature for 60 minutes. After the reaction, separate the free amine and water. Viscosity: 6400 mPa·s. Amine value: 238 mgKOH / g;

[0037] Including B) and C) preparation of curing agent

[0038]A mixture of 280 g of the prepared isolated adduct B) and 120 g of polyetheramine was homogeneously mixed at 20°C-40°C. Viscosity...

Embodiment 3

[0039] Embodiment 3: including A) and B) and C) the preparation of curing agent

[0040] Under the condition of 20°C-40°C, 48 g of the isolated adduct A) prepared in Example 1, 240 g of the isolated adduct B) prepared in Example 1 and 112 g of polyetheramine were mixed uniformly. Viscosity: 470mPa·s. Amine value: 318 mgKOH / g.

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Abstract

The invention provides an epoxy resin composite curing agent capable of being flexibly blended. The epoxy resin composite curing agent comprises: A) 1-99 wt% of an adduct obtained by reacting a1) (an aliphatic amine and an alicyclic amine) and a2) (monoepoxide glycidyl ether); and / or B) 99-1 wt% of an adduct obtained by reacting b1) (a phenol compound), b2) (an aldehyde compound) and b3) (an aliphatic amine, an alicyclic amine and a modified amine); and / or C) 99-1 wt% of a polyether amine, with the sum of the weight percentages of the A), the B) and the C) being 100%. A proper composition of the A), the B) and the C), or a proper composition of the A) and the B), or a proper composition of the B) and the C) can be used as the curing agent by a user according to actual demands. When the curing agent is used, the mixing ratio of the curing agent and epoxy resin preferably is equivalent, namely, one equivalent weight of epoxy resin is used for one equivalent weight of the amine. The curing agent has a characteristic of capability of being processed and cured at room temperature in a humid environment, and has characteristics of long working lifetime, proper post curing time, convenient operation, safe production environment, low toxicity, and the like.

Description

technical field [0001] The invention relates to an epoxy resin curing agent, in particular to a flexible epoxy resin combined curing agent, which belongs to the field of chemical industry. Background technique [0002] Epoxy resin is a kind of thermosetting polymer composite material with good adhesion, corrosion resistance, electrical insulation, high strength and other properties. It is widely used in the bonding of various metals and non-metals, corrosion-resistant coatings, electrical insulation Materials, FRP / composite materials, etc., play an important role in electronics, electrical, machinery manufacturing, chemical anticorrosion, aerospace, shipping and other industrial fields, and have become indispensable basic materials in various industrial fields. The performance of epoxy resin adhesives requires extremely high performance of the curing agent used. [0003] Generally, epoxy resin curing agents are required to be used in a dry environment, but in humid environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/64C08G59/62C08G59/56C08G8/04
Inventor 袁媛寻金锭
Owner HUNAN MAGPOW ADHESIVE INDS
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