CN109161166B - Fast-curing low-shrinkage epoxy pouring filler and preparation method thereof - Google Patents
Fast-curing low-shrinkage epoxy pouring filler and preparation method thereof Download PDFInfo
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- CN109161166B CN109161166B CN201810934631.9A CN201810934631A CN109161166B CN 109161166 B CN109161166 B CN 109161166B CN 201810934631 A CN201810934631 A CN 201810934631A CN 109161166 B CN109161166 B CN 109161166B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/5006—Amines aliphatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/504—Amines containing an atom other than nitrogen belonging to the amine group, carbon and hydrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
The invention provides a fast-curing low-shrinkage epoxy pouring filler which is prepared from a component A and a component B according to the weight ratio of 10-15: 1, mixing and reacting; the component A comprises the following substances in parts by weight: 20-40 parts of epoxy resin, 5-15 parts of epoxy diluent, 0.5-1 part of auxiliary agent, 50-70 parts of filler and 3-5 parts of water; the component B comprises the following substances in parts by weight: 80-92 parts of amine curing agent and 8-20 parts of calcium oxide. The filler overcomes the defects in the background art, adopts the stable reaction curing agent matched with the self-heat release system in the reaction system, can realize quick curing without being influenced by the external environment, has stable reaction, and greatly improves the use shrinkage in summer.
Description
Technical Field
The invention provides a fast-curing low-shrinkage epoxy casting filler, in particular relates to a casting filler for a lining plate of a cone crusher, and belongs to the technical field of high molecular compounds.
Background
The cone crusher is a crushing machine suitable for raw materials in the industries of metallurgy, building, road building, chemistry and silicate. According to the different crushing principles and the different sizes of product particles, the products are divided into a plurality of models. The cone crusher is widely applied to various departments such as mines, smelting, building materials, roads, railways, water conservancy, chemical industry and the like. The cone crusher has large crushing ratio, high efficiency, low energy consumption and uniform product granularity, and is suitable for medium crushing and fine crushing of various ores and rocks. The epoxy casting filler is used as a protective material for the lining plates of the fixed cone and the movable cone of the cone crusher, and has the advantages of convenient operation, easy casting, good compressive strength and impact resistance and wide application. However, in casting production, the following problems are often encountered: 1. the curing is carried out in the environment with lower temperature in winter, the curing time is longer, the shutdown time of the cone crusher is long, and the production is influenced. 2. The epoxy resin is cured in an environment with high temperature in summer, and because the epoxy casting amount is large, the reaction implode and heat release are obvious, the problem of easy shrinkage of the casting material due to internal stress can occur.
Disclosure of Invention
The invention provides a fast-curing low-shrinkage epoxy pouring filler, which overcomes the defects in the background art, adopts a reaction stable curing agent matched with a self-heat-release system in a reaction system, can realize fast curing without being influenced by external environment, has stable reaction, and greatly improves the shrinkage in summer.
The technical scheme adopted for realizing the above purpose of the invention is as follows:
a fast-curing low-shrinkage epoxy pouring filler is prepared from a component A and a component B according to the weight ratio of 10-15: 1, mixing and reacting;
the component A comprises the following substances in parts by weight: 20-40 parts of epoxy resin, 5-15 parts of epoxy diluent, 0.5-1 part of auxiliary agent, 50-70 parts of filler and 3-5 parts of water;
the component B comprises the following substances in parts by weight: 80-92 parts of amine curing agent and 8-20 parts of calcium oxide.
The epoxy resin in the component A is as follows: the epoxy resin composition comprises a composition of E51 type epoxy resin, F51 type epoxy resin and water-based epoxy resin CYDW-100, wherein the mass ratio of the E51 type epoxy resin to the F51 type epoxy resin to the water-based epoxy resin is 2: 0.5-1.5: 0.5 to 1.5.
The epoxy diluent in the component A is as follows: the composition of ethylene glycol diglycidyl ether and allyl glycidyl ether comprises the following components in a mass ratio of 1: 0.5 to 1.5.
The auxiliary agent in the component A is as follows: the mass ratio of the defoaming agent to the wetting dispersant to the flatting agent is 3: 1.5-2.5: 4 to 6.
The filler in the component A is as follows: active silicon micro powder compositions with the particle diameters of 100 meshes, 200 meshes and 600 meshes after surface treatment by KH570, wherein the mass ratio of the active silicon micro powder to the KH570 is 1: 1.5-2.5: 2.5 to 3.5.
The amine curing agent in the component B is as follows: the composition of N-aminoethyl piperazine, 1, 3-cyclohexyldimethylamine, m-xylylenediamine and polyetheramine D-230 is prepared from the following components in a mass ratio of 3.5-4.5: 1: 2.5-3.5: 1.5 to 2.5.
The calcium oxide in the component B is as follows: the calcium oxide composition with the particle size of 200 meshes and 800 meshes respectively has a mass ratio of 1: 2 to 3.
In the field, because the curing agent has stable reaction, small heat release and small shrinkage, the curing agent is not suitable for use due to slow reaction speed and long curing time when the temperature is low in winter; the rapid curing agent is relatively quick in curing speed and is relatively common in use, but the rapid curing agent has the defects that heat is not released when the reaction is not carried out, and once the reaction is carried out, a large amount of heat is released to cause implosion, so that the castable is easy to shrink. Therefore, in order to solve the problems, the aliphatic amine and polyether amine curing agent composition is selected, the curing agent has stable reaction, low heat release and small shrinkage, a certain amount of water is creatively added into the component A, when the component A and the component B are mixed, the curing agent, the calcium oxide and the water in the component B are mixed to release heat, and the released heat can promote the curing reaction to be carried out, so that the rapid curing is realized, and the problem that the curing speed of the curing agent composition is low in a low-temperature environment is solved. The calcium oxide added in the component B reacts with water to generate calcium hydroxide, so that water in the whole curing system is eliminated, and the influence of water doping on the curing performance of the castable is solved.
Therefore, the fast-curing low-shrinkage epoxy casting filler provided by the invention has the advantages of fast curing in winter, stable reaction in summer, excellent mechanical property after curing, low shrinkage and the like.
Detailed Description
The present invention will be described in detail with reference to specific examples, but the scope of the present invention is not limited to the examples.
Example 1
The fast-curing low-shrinkage epoxy casting filler provided in the embodiment is prepared from a component A and a component B according to the weight ratio of 13: 1, mixing and reacting;
the component A comprises the following substances in parts by weight: the coating is prepared from E51 type epoxy resin (13 parts), F51 type epoxy resin (6.5 parts), waterborne epoxy resin CYDW-100(6.5 parts), ethylene glycol diglycidyl ether (4.5 parts), allyl glycidyl ether (4.5 parts), defoaming agent BYK-A530(0.3 part), wetting dispersant BYK-110(0.2 part), flatting agent BYK-306(0.5 part), 100-mesh active silica micropowder (10 parts), 200-mesh active silica micropowder (20 parts), 600-mesh active silica micropowder (31 parts) and water (3 parts) by the following processes: 1. weighing water-based epoxy resin CYDW-100, wetting dispersant BYK-110 and water in a container, stirring for 10min at normal temperature of 500r/min, 2, adding E51 type epoxy resin, F51 type epoxy resin, ethylene glycol diglycidyl ether, allyl glycidyl ether, defoaming agent BYK-A530 and leveling agent BYK-306 into 1, stirring for 10min at normal temperature of 500r/min, 3, adding 100-mesh active silica powder, 200-mesh active silica powder and 600-mesh active silica powder into 2, vacuumizing at normal temperature (-0.95MPa) and stirring for 30min at 1000r/min to prepare component A;
the component B comprises the following substances in parts by weight: n-aminoethyl piperazine (36.8 parts), 1, 3-cyclohexyldimethylamine (9.2 parts), m-xylylenediamine (27.6 parts), polyetheramine D-230(18.4 parts), calcium oxide (8 parts), and was prepared by the following procedure: weighing N-aminoethyl piperazine, 1, 3-cyclohexyldimethylamine, m-xylylenediamine, polyetheramine D-230 and calcium oxide in a container, and stirring at the normal temperature of 1000r/min for 30min to prepare a component B;
mixing the A, B components in a mass ratio A: b-13: 1, mixing uniformly, and carrying out performance test, wherein the results are as follows: viscosity 6200 mPas (25 ℃), working time (min, 1Kg of gum, 35 ℃): 50min, the time (min,35 ℃) required for the hardness of the condensate to reach 80D: 235min, compressive strength (MPa, after 12 hours of curing): 135MPa, shrinkage gap after curing: no gap is formed;
mixing the A, B components in a mass ratio A: b-13: 1, mixing uniformly, and carrying out performance test, wherein the results are as follows: viscosity 6200 mPas (25 ℃), working time (min, 1Kg of gum, 5 ℃): 53min, the time (min, 5 ℃) required for the hardness of the cured product to reach 80D: 242min, compressive strength (MPa, after 12 hours of curing): 134MPa, shrinkage gap after curing: and no gap is formed.
Example 2
The fast-curing low-shrinkage epoxy casting filler provided in the embodiment is prepared from a component A and a component B according to the weight ratio of 13: 1, mixing and reacting;
the component A comprises the following substances in parts by weight: type E51 epoxy resin (13 parts), type F51 epoxy resin (6.5 parts), water-borne epoxy resin CYDW-100(6.5 parts), ethylene glycol diglycidyl ether (4.5 parts), allyl glycidyl ether (4.5 parts), defoaming agent BYK-a530(0.3 part), wetting dispersant BYK-110(0.2 part), leveling agent BYK-306(0.5 part), 100 mesh active silica micropowder (10 parts), 200 mesh active silica micropowder (20 parts), 600 mesh active silica micropowder (30 parts), and water (4 parts), and was prepared by the procedure described in example 1.
The component B comprises the following substances in parts by weight: n-aminoethylpiperazine (34.4 parts), 1, 3-cyclohexyldimethylamine (8.6 parts), m-xylylenediamine (25.8 parts), polyetheramine D-230(17.2 parts), and calcium oxide (14 parts) were prepared according to the procedure described in example 1.
Mixing the A, B components in a mass ratio A: b-13: 1, mixing uniformly, and carrying out performance test, wherein the results are as follows: viscosity 6250 mPas (25 ℃ C.), working time (min, 1Kg gum mass, 35 ℃): 46min, the time (min,35 ℃) required for the hardness of the cured product to reach 80D: 221min, compressive strength (MPa, after 12 hours curing): 136MPa, shrinkage gap after curing: no gap is formed;
mixing the A, B components in a mass ratio A: b-13: 1, mixing uniformly, and carrying out performance test, wherein the results are as follows: viscosity 6250 mPas (25 ℃ C.), working time (min, 1Kg gum content, 5 ℃): 49min, the time (min, 5 ℃) required for the hardness of the cured product to reach 80D: 230min, compressive strength (MPa, after 12 hours of curing): 135MPa, shrinkage gap after curing: and no gap is formed.
Example 3
The fast-curing low-shrinkage epoxy casting filler provided in the embodiment is prepared from a component A and a component B according to the weight ratio of 13: 1, mixing and reacting;
the component A comprises the following substances in parts by weight: type E51 epoxy resin (13 parts), type F51 epoxy resin (6.5 parts), water-borne epoxy resin CYDW-100(6.5 parts), ethylene glycol diglycidyl ether (4.5 parts), allyl glycidyl ether (4.5 parts), defoaming agent BYK-a530(0.3 part), wetting dispersant BYK-110(0.2 part), leveling agent BYK-306(0.5 part), 100 mesh active silica micropowder (10 parts), 200 mesh active silica micropowder (20 parts), 600 mesh active silica micropowder (29 parts), and water (5 parts) and was prepared by the procedure described in example 1.
The component B comprises the following substances in parts by weight: n-aminoethylpiperazine (32 parts), 1, 3-cyclohexyldimethylamine (8 parts), m-xylylenediamine (24 parts), polyetheramine D-230(16 parts), and calcium oxide (20 parts) were prepared according to the procedure described in example 1.
Mixing the A, B components in a mass ratio A: b-13: 1, mixing uniformly, and carrying out performance test, wherein the results are as follows: viscosity 6300 mPas (25 ℃ C.), pot life (min, 1Kg gum mass, 35 ℃): 44min, the time (min,35 ℃) required for the hardness of the cured product to reach 80D: 211min, compressive strength (MPa, after 12 hours of curing): 136MPa, shrinkage gap after curing: no gap is formed;
mixing the A, B components in a mass ratio A: b-13: 1, mixing uniformly, and carrying out performance test, wherein the results are as follows: viscosity 6300 mPas (25 ℃ C.), pot life (min, 1Kg gum mass, 5 ℃): 47min, the time (min, 5 ℃) required for the hardness of the cured product to reach 80D: 219min, compressive strength (MPa, after 12 hours curing): 135MPa, shrinkage gap after curing: and no gap is formed.
Example 4
The fast-curing low-shrinkage epoxy casting filler provided in the embodiment is prepared from a component A and a component B according to the weight ratio of 10: 1, mixing and reacting;
the component A comprises the following substances in parts by weight: type E51 epoxy resin (13 parts), type F51 epoxy resin (6.5 parts), water-borne epoxy resin CYDW-100(6.5 parts), ethylene glycol diglycidyl ether (4.5 parts), allyl glycidyl ether (4.5 parts), defoaming agent BYK-a530(0.3 part), wetting dispersant BYK-110(0.2 part), leveling agent BYK-306(0.5 part), 100 mesh active silica micropowder (10 parts), 200 mesh active silica micropowder (20 parts), 600 mesh active silica micropowder (31 parts), and water (3 parts), and was prepared by the procedure described in example 1.
The component B comprises the following substances in parts by weight: n-aminoethylpiperazine (36.8 parts), 1, 3-cyclohexyldimethylamine (9.2 parts), m-xylylenediamine (27.6 parts), polyetheramine D-230(18.4 parts), and calcium oxide (8 parts) were prepared according to the procedure described in example 1.
Mixing the A, B components in a mass ratio A: b is 10: 1, mixing uniformly, and carrying out performance test, wherein the results are as follows: viscosity 6050 mPas (25 ℃), working time (min, 1Kg of gum, 35 ℃): 44min, the time (min,35 ℃) required for the hardness of the cured product to reach 80D: 230min, compressive strength (MPa, after 12 hours of curing): 134MPa, shrinkage gap after curing: no gap is formed;
mixing the A, B components in a mass ratio A: b is 10: 1, mixing uniformly, and carrying out performance test, wherein the results are as follows: viscosity 6050 mPas (25 ℃), working time (min, 1Kg of gum, 5 ℃): 47min, the time (min, 5 ℃) required for the hardness of the cured product to reach 80D: 237min, compressive strength (MPa, after 12 hours of curing): 133MPa, shrinkage gap after curing: and no gap is formed.
Example 5
The fast-curing low-shrinkage epoxy casting filler provided in the embodiment is prepared from a component A and a component B according to the weight ratio of 15: 1, mixing and reacting;
the component A comprises the following substances in parts by weight: type E51 epoxy resin (13 parts), type F51 epoxy resin (6.5 parts), water-borne epoxy resin CYDW-100(6.5 parts), ethylene glycol diglycidyl ether (4.5 parts), allyl glycidyl ether (4.5 parts), defoaming agent BYK-a530(0.3 part), wetting dispersant BYK-110(0.2 part), leveling agent BYK-306(0.5 part), 100 mesh active silica micropowder (10 parts), 200 mesh active silica micropowder (20 parts), 600 mesh active silica micropowder (31 parts), and water (3 parts), and was prepared by the procedure described in example 1.
The component B comprises the following substances in parts by weight: n-aminoethylpiperazine (36.8 parts), 1, 3-cyclohexyldimethylamine (9.2 parts), m-xylylenediamine (27.6 parts), polyetheramine D-230(18.4 parts), and calcium oxide (8 parts) were prepared according to the procedure described in example 1.
Mixing the A, B components in a mass ratio A: b15: 1, mixing uniformly, and carrying out performance test, wherein the results are as follows: viscosity 6350 mPas (25 ℃ C.), open time (min, 1Kg gum mass, 35 ℃): 54min, the time (min,35 ℃) required for the hardness of the cured product to reach 80D: 239min, compressive strength (MPa, after 12 hours of curing): 133MPa, shrinkage gap after curing: no gap is formed;
mixing the A, B components in a mass ratio A: b15: 1, mixing uniformly, and carrying out performance test, wherein the results are as follows: viscosity 6350 mPas (25 ℃ C.), open time (min, 1Kg gum, 5 ℃): 57min, the time (min, 5 ℃) required for the hardness of the cured product to reach 80D: 247min, compressive strength (MPa, after 12 hours of curing): 132MPa, shrinkage gap after curing: and no gap is formed.
Comparative example 1
The fast curing low shrinkage epoxy casting filler provided in the comparative example is prepared from a component A and a component B according to the following ratio of 13: 1, mixing and reacting;
the component A comprises the following substances in parts by weight: type E51 epoxy resin (13 parts), type F51 epoxy resin (6.5 parts), water-based epoxy resin CYDW-100(6.5 parts), ethylene glycol diglycidyl ether (4.5 parts), allyl glycidyl ether (4.5 parts), defoaming agent BYK-a530(0.3 part), wetting dispersant BYK-110(0.2 part), leveling agent BYK-306(0.5 part), 100 mesh active silica micropowder (10 parts), 200 mesh active silica micropowder (20 parts), 600 mesh active silica micropowder (34 parts), and prepared by the process described in example 1.
The component B comprises the following substances in parts by weight: n-aminoethylpiperazine (40 parts), 1, 3-cyclohexyldimethylamine (10 parts), m-xylylenediamine (30 parts), and polyetheramine D-230(20 parts) were prepared according to the procedure described in example 1.
Mixing the A, B components in a mass ratio A: b-13: 1, mixing uniformly, and carrying out performance test, wherein the results are as follows: viscosity 6200 mPas (25 ℃), working time (min, 1Kg of gum, 35 ℃): 125min, the time (min,35 ℃) required for the hardness of the cured product to reach 80D: 510min, compressive strength (MPa, after 12 hours of curing): 86MPa, shrinkage gap after curing: a gap is formed;
mixing the A, B components in a mass ratio A: b-13: 1, mixing uniformly, and carrying out performance test, wherein the results are as follows: viscosity 6200 mPas (25 ℃), working time (min, 1Kg of gum, 5 ℃): 160min, the time (min, 5 ℃) required for the hardness of the cured product to reach 80D: 625min, compressive strength (MPa, after 12 hours of curing): 83MPa, shrinkage gap after curing: and no gap is formed.
After analyzing the detection results of the above examples and comparative examples, it can be seen that: compared with the comparative example, the fast-curing low-shrinkage epoxy casting filler provided by the invention has the advantages of appropriate operable time, high curing speed, high compressive strength of cured colloid and no shrinkage gap no matter the filler is used in an environment with higher or lower temperature.
Claims (5)
1. A fast-curing low-shrinkage epoxy pouring filler is characterized by comprising a component A and a component B according to the weight ratio of 10-15: 1, mixing and reacting;
the component A comprises the following substances in parts by weight: 20-40 parts of epoxy resin, 5-15 parts of epoxy diluent, 0.5-1 part of auxiliary agent, 50-70 parts of filler and 3-5 parts of water;
the component B comprises the following substances in parts by weight: 80-92 parts of amine curing agent and 8-20 parts of calcium oxide; the amine curing agent is: the composition of N-aminoethyl piperazine, 1, 3-cyclohexyldimethylamine, m-xylylenediamine and polyetheramine D-230 is prepared from the following components in a mass ratio of 3.5-4.5: 1: 2.5-3.5: 1.5-2.5; the calcium oxide is: the calcium oxide composition with the particle size of 200 meshes and 800 meshes respectively has a mass ratio of 1: 2 to 3.
2. The fast curing low shrinkage epoxy casting compound of claim 1, wherein: the epoxy resin in the component A is as follows: the epoxy resin composition comprises a composition of E51 type epoxy resin, F51 type epoxy resin and water-based epoxy resin CYDW-100, wherein the mass ratio of the E51 type epoxy resin to the F51 type epoxy resin to the water-based epoxy resin is 2: 0.5-1.5: 0.5 to 1.5.
3. The fast curing low shrinkage epoxy casting compound of claim 1, wherein: the epoxy diluent in the component A is as follows: the composition of ethylene glycol diglycidyl ether and allyl glycidyl ether comprises the following components in a mass ratio of 1: 0.5 to 1.5.
4. The fast curing low shrinkage epoxy casting compound of claim 1, wherein: the auxiliary agent in the component A is as follows: the mass ratio of the defoaming agent to the wetting dispersant to the flatting agent is 3: 1.5-2.5: 4 to 6.
5. The fast curing low shrinkage epoxy casting compound of claim 1, wherein: the filler in the component A is as follows: the active silicon micro powder composition with the particle sizes of 100 meshes, 200 meshes and 600 meshes respectively has the mass ratio of 1: 1.5-2.5: 2.5 to 3.5.
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