CN107418498B - Elastic epoxy flame-retardant pouring sealant and preparation method thereof - Google Patents
Elastic epoxy flame-retardant pouring sealant and preparation method thereof Download PDFInfo
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- CN107418498B CN107418498B CN201710810931.1A CN201710810931A CN107418498B CN 107418498 B CN107418498 B CN 107418498B CN 201710810931 A CN201710810931 A CN 201710810931A CN 107418498 B CN107418498 B CN 107418498B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
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Abstract
The invention provides an elastic epoxy flame-retardant pouring sealant which comprises a component A and a component B, wherein the component A is prepared from polyurethane modified epoxy resin, an active diluent, a defoaming agent, a melamine salt powder flame retardant, a liquid phosphate flame retardant and an aluminum hydroxide filler; the component B is prepared from a curing agent, a curing accelerator and a calcium carbonate filler. According to the invention, a system of low-viscosity flexible epoxy resin, a flexibilizer and a curing agent is adopted to be compounded with tri-n-butyl phosphate, an epoxy resin environment-friendly flame retardant, aluminum hydroxide and the like, so that the viscosity of the mixed epoxy AB component is low and can be leveled, a cured product has certain elasticity and is easy to peel, and the UL94 flame retardant test of the cured product of the epoxy resin reaches the V-0 level.
Description
Technical Field
The invention belongs to the technical field of pouring sealant, and particularly relates to elastic epoxy flame-retardant pouring sealant and a preparation method thereof.
Background
With the development of the electronic and electrical industry, the requirements on the performance of the cured epoxy resin are higher and higher, the potting materials of many electronic and electrical elements at present require various performances such as flame retardance, leveling property, elasticity and the like, while the common epoxy potting adhesive does not have the flame retardance, generally has higher viscosity and is not easy to level, and the cured epoxy resin has higher elastic modulus, is brittle and easy to crack.
Epoxy resin cured products are generally rigid materials, and it is difficult to effectively remove the adhesive during repair of electrical components, and in order to make the cured products easily peelable, it is necessary to make the epoxy cured products have a certain elasticity. The toughening agent with a certain proportion is usually added into the epoxy pouring sealant for increasing the elasticity, while the common toughening agent has high viscosity, and the formula occupies a certain proportion of aluminum hydroxide, epoxy flame retardant and other powder materials due to the requirement of flame retardant property, so that the epoxy pouring sealant has high overall viscosity and is not easy to level. Therefore, the problem to be solved in the electronic and electrical industry is to provide a low-viscosity, leveling and elastic epoxy flame-retardant pouring sealant.
Disclosure of Invention
In view of this, the technical problem to be solved by the present invention is to provide an elastic epoxy flame retardant pouring sealant and a preparation method thereof.
The invention provides an elastic epoxy flame-retardant pouring sealant which comprises a component A and a component B, wherein the component A is prepared from polyurethane modified epoxy resin, an active diluent, a defoaming agent, a melamine salt powder flame retardant, a liquid phosphate flame retardant and an aluminum hydroxide filler;
the component B is prepared from a curing agent, a curing accelerator and a calcium carbonate filler.
Preferably, the component A is prepared from the following raw materials in parts by mass:
80-120 parts by mass of a polyurethane-modified epoxy resin;
5-10 parts by mass of an epoxy resin;
5-10 parts by mass of an active diluent;
2-4 parts by mass of a defoaming agent;
10-20 parts by mass of a liquid phosphate flame retardant;
50-60 parts by mass of a melamine salt powder flame retardant;
50-80 parts by mass of an aluminum hydroxide filler;
the component B is prepared from the following raw materials in parts by mass:
19-39 parts by mass of a curing agent;
2-5 parts by mass of a curing accelerator;
11-28 parts by mass of calcium carbonate filler.
Preferably, the polyurethane modified epoxy resin is a polyurethane prepolymer terminated by an epoxy group, the number average molecular weight is 500-1500, and the epoxy value is 0.20-0.4.
Preferably, the epoxy resin is selected from bisphenol A diglycidyl ether type epoxy resin or bisphenol F diglycidyl ether type epoxy resin, and the epoxy equivalent of the epoxy resin is 160-220.
Preferably, the reactive diluent is selected from a monofunctional glycidyl ether type reactive epoxy diluent or a difunctional glycidyl ether type reactive epoxy diluent.
Preferably, the melamine salt powder flame retardant is selected from melamine urate or melamine phosphate.
Preferably, the curing agent is an amine curing agent, the Grignard color is less than or equal to 3, the equivalent weight of active hydrogen is 40-100, and the curing accelerator is selected from aminophenol curing accelerators.
Preferably, the aluminum hydroxide filler is 800-1250 mesh aluminum hydroxide.
Preferably, the defoamer is selected from silicone-free defoamers.
The invention also provides a preparation method of the elastic epoxy flame-retardant pouring sealant, which comprises the following steps:
preparation of component A:
mixing and stirring polyurethane modified epoxy resin, a diluent, a liquid phosphate flame retardant and a defoaming agent for 5-10 minutes at 5-10 rpm;
then adding melamine salt powder flame retardant and aluminum hydroxide filler, mixing and stirring for 20-30 minutes at 20-30 rpm, and then carrying out vacuum defoaming for 5 minutes to obtain a component A;
preparation of the component B:
mixing and stirring a curing agent and a curing accelerator for 5-10 minutes at 5-10 rpm, adding a calcium carbonate filler, mixing and stirring for 20-30 minutes at 20-30 rpm, and performing vacuum defoaming for 5 minutes to obtain a component B;
the preparation of the A component and the B component is not limited in sequence.
Compared with the prior art, the invention provides an elastic epoxy flame-retardant pouring sealant which comprises a component A and a component B, wherein the component A is prepared from polyurethane modified epoxy resin, an active diluent, a defoaming agent, a melamine salt powder flame retardant, a liquid phosphate flame retardant and an aluminum hydroxide filler; the component B is prepared from a curing agent, a curing accelerator and a calcium carbonate filler. According to the invention, a system of low-viscosity flexible epoxy resin, a flexibilizer and a curing agent is adopted to be compounded with tri-n-butyl phosphate, an epoxy resin environment-friendly flame retardant, aluminum hydroxide and the like, so that the viscosity of the mixed epoxy AB component is low and can be leveled, a cured product has certain elasticity and is easy to peel, and the UL94 flame retardant test of the cured product of the epoxy resin reaches the V-0 level.
Detailed Description
The invention provides an elastic epoxy flame-retardant pouring sealant which comprises a component A and a component B, wherein the component A is prepared from polyurethane modified epoxy resin, an active diluent, a defoaming agent, a melamine salt powder flame retardant, a liquid phosphate flame retardant and an aluminum hydroxide filler;
the component B is prepared from a curing agent, a curing accelerator and a calcium carbonate filler.
Preferably, the component A in the elastic epoxy flame-retardant pouring sealant provided by the invention is prepared from the following raw materials in parts by mass:
80-120 parts by mass of a polyurethane-modified epoxy resin;
5-10 parts by mass of an epoxy resin;
5-10 parts by mass of an active diluent;
2-4 parts by mass of a defoaming agent;
10-20 parts by mass of a liquid phosphate flame retardant;
50-60 parts by mass of a melamine salt powder flame retardant;
50-80 parts by mass of an aluminum hydroxide filler;
the component B is prepared from the following raw materials in parts by mass:
19-39 parts by mass of a curing agent;
2-5 parts by mass of a curing accelerator;
11-28 parts by mass of calcium carbonate filler.
The elastic epoxy flame-retardant pouring sealant provided by the invention is a two-component elastic epoxy flame-retardant pouring sealant, and comprises a component A and a component B.
The component A is prepared from polyurethane modified epoxy resin, a reactive diluent, a defoaming agent, a melamine salt powder flame retardant, a liquid phosphate flame retardant and an aluminum hydroxide filler.
The preparation raw material of the component A of the elastic epoxy flame-retardant pouring sealant comprises polyurethane modified epoxy resin, wherein the polyurethane modified epoxy resin is a polyurethane prepolymer capped by an epoxy group, the number average molecular weight is 500-1500, preferably 800-1200, and the epoxy value is 0.20-0.4, preferably 0.25-0.35. The source of the polyurethane modified epoxy resin is not particularly limited, and the polyurethane modified epoxy resin can be generally sold in the market. Preferably a polyurethane modified epoxy resin (epoxy value 0.38 + -0.02) available from the firm Jiafa chemical company, LLC with the model number Jeff0211 or a polyurethane modified epoxy resin (epoxy value 0.22 + -0.02) available from Taizhou Hengchang insulation material with the model number 102C-4L. The addition amount of the polyurethane modified epoxy resin is 80-120 parts by mass, preferably 90-110 parts by mass, and more preferably 95-105 parts by mass.
The preparation raw material of the component A of the elastic epoxy flame-retardant pouring sealant provided by the invention also comprises epoxy resin, wherein the epoxy resin is selected from bisphenol A diglycidyl ether type epoxy resin or bisphenol F diglycidyl ether type epoxy resin, and the epoxy equivalent of the epoxy resin is 160-220. The source of the epoxy resin is not particularly limited in the present invention, and the epoxy resin is generally commercially available. The bisphenol A diglycidyl ether type epoxy resin is preferably an epoxy resin with the model number BE188-90 from Changchun chemical engineering (Jiangsu) Co., Ltd, and the bisphenol F diglycidyl ether type epoxy resin is preferably an epoxy resin with the model number BF170 from Changchun artificial resin factory Co., Ltd. The addition amount of the epoxy resin is 5-10 parts by mass, preferably 6-9 parts by mass, and more preferably 7-8 parts by mass.
The preparation raw material of the component A of the elastic epoxy flame-retardant pouring sealant also comprises a reactive diluent, wherein the reactive diluent is a monofunctional or bifunctional glycidyl ether type reactive epoxy diluent, and the epoxy equivalent of the epoxy resin is 160-220, preferably 180-200. The source of the reactive diluent is not particularly limited in the present invention, and the reactive diluent is generally commercially available. In the present invention, the reactive epoxy diluent is preferably a monofunctional epoxy reactive diluent available from New chemical industries, Inc. of Anhui under the model number XY748 or a difunctional epoxy reactive diluent available under the model number XY 207. The addition amount of the reactive diluent is 5-10 parts by mass, preferably 6-9 parts by mass, and more preferably 7-8 parts by mass.
The raw materials for preparing the component A of the elastic epoxy flame-retardant pouring sealant also comprise a defoaming agent, and the defoaming agent is preferably a defoaming agent without organic silicon. The source of the defoaming agent is not particularly limited in the present invention, and the defoaming agent is generally commercially available. In the present invention, the antifoaming agent is preferably an antifoaming agent available from hamenkonac chemical limited under model AFCONA 2020. The addition amount of the defoaming agent is 2-4 parts by mass, preferably 2.5-3.5 parts by mass, and more preferably 2.8-3.2 parts by mass.
The raw materials for preparing the component A of the elastic epoxy flame-retardant pouring sealant also comprise a liquid phosphate flame retardant, wherein the liquid phosphate flame retardant is selected from flame retardants prepared by carrying out hydrogen chloride elimination reaction on phosphorus oxychloride and phenolic compounds or alcohol compounds. The source of the liquid phosphate flame retardant is not particularly limited, and the liquid phosphate flame retardant can be generally sold in the market. In the invention, the liquid phosphate flame retardant is preferably BDP-bisphenol A bis (diphenyl) phosphate purchased from Wanshengmen company Limited in Zhejiang or TCEP tri-beta-chloroethyl phosphate purchased from Long Xiang chemical company Limited in Qiandao lake. The addition amount of the liquid phosphate flame retardant is 10-20 parts by mass, preferably 12-18 parts by mass, and more preferably 14-16 parts by mass.
The raw materials for preparing the component A of the elastic epoxy flame-retardant pouring sealant also comprise melamine salt powder flame retardant, and the melamine salt powder flame retardant is selected from melamine urate or melamine phosphate. The melamine salt powder flame retardant is not particularly limited in source and can be generally sold in the market, and in the invention, the melamine salt powder flame retardant is preferably purchased from melamine urate with the model number of FR106 of Qingdao sea chemical industry Co., Ltd or purchased from melamine urate with the model number of MP of Gaobao chemical industry Material Co., Ltd. The addition amount of the melamine salt powder flame retardant is 50-60 parts by mass, preferably 52-58 parts by mass, and more preferably 54-56 parts by mass.
The preparation raw materials of the component A of the elastic epoxy flame-retardant pouring sealant also comprise an aluminum hydroxide filler, wherein the aluminum hydroxide filler is 800-1250-mesh aluminum hydroxide. Aluminum hydroxide, model number V101, available from the forskode chemical industry, inc. The amount of the aluminum hydroxide filler added is 50 to 80 parts by mass, preferably 60 to 70 parts by mass, and more preferably 62 to 68 parts by mass.
The elastic epoxy flame-retardant pouring sealant provided by the invention also comprises a component B, wherein the component B is prepared from a curing agent, a curing accelerator and a calcium carbonate filler.
The raw materials for preparing the component B of the elastic epoxy flame-retardant pouring sealant comprise a curing agent, wherein the curing agent is selected from amine curing agents, preferably alicyclic amine or modified alicyclic amine, the Grignard color is less than or equal to 3, and the equivalent weight of active hydrogen is 40-100, preferably 50-90. The source of the curing agent is not particularly limited in the present invention, and the curing agent may be generally commercially available. The curative is preferably available from Guangzhou Ruizi chemical company Limited as R2262 (modified alicyclic amine, active hydrogen equivalent 97) or R2283 (alicyclic amine, active hydrogen equivalent 62). The addition amount of the curing agent is 19 to 39 parts by mass, preferably 22 to 30 parts by mass, and more preferably 24 to 26 parts by mass.
The raw materials for preparing the component B of the elastic epoxy flame-retardant pouring sealant also comprise a curing accelerator, wherein the curing accelerator is selected from aminophenol curing accelerators. The source of the curing accelerator is not particularly limited in the present invention, and the curing accelerator is generally commercially available. In the present invention, the curing accelerator is preferably a curing accelerator available from Shanghai Du Er chemical Co., Ltd, model number DMP-30[ scientific name: 2,4,6- (N, N-dimethylaminomethyl) phenol ]. The addition amount of the curing accelerator is 2 to 5 parts by mass, preferably 3 to 4 parts by mass, and more preferably 3.2 to 3.8 parts by mass.
The raw materials for preparing the component B of the elastic epoxy flame-retardant pouring sealant also comprise calcium carbonate filler, wherein the calcium carbonate filler is preferably precipitated calcium carbonate, and more preferably precipitated calcium carbonate with the model number of S-CCR-100, which is purchased from double super calcium industries, ltd, Jiande. The addition amount of the calcium carbonate filler is 11-28 parts by mass, preferably 15-25 parts by mass, and more preferably 18-22 parts by mass.
The invention also provides a preparation method of the elastic epoxy flame-retardant pouring sealant, which comprises the following steps:
preparation of component A:
mixing and stirring polyurethane modified epoxy resin, a diluent, a liquid phosphate flame retardant and a defoaming agent for 5-10 minutes at 5-10 rpm;
then adding melamine salt powder flame retardant and aluminum hydroxide filler, mixing and stirring for 20-30 minutes at 20-30 rpm, and then carrying out vacuum defoaming for 5 minutes to obtain a component A;
preparation of the component B:
mixing and stirring a curing agent and a curing accelerator for 5-10 minutes at 5-10 rpm, adding a calcium carbonate filler, mixing and stirring for 20-30 minutes at 20-30 rpm, and performing vacuum defoaming for 5 minutes to obtain a component B;
the preparation of the A component and the B component is not limited in sequence.
According to the invention, a system of low-viscosity flexible epoxy resin, a flexibilizer and a curing agent is adopted to be compounded with tri-n-butyl phosphate, an epoxy resin environment-friendly flame retardant, aluminum hydroxide and the like, so that the viscosity of the mixed epoxy AB component is low and can be leveled, a cured product has certain elasticity and is easy to peel, and the UL94 flame retardant test of the cured product of the epoxy resin reaches the V-0 level.
For further understanding of the present invention, the following examples are provided to illustrate the elastic epoxy flame retardant potting adhesive and the preparation method thereof, and the scope of the present invention is not limited by the following examples.
Examples 1 to 6
1. The raw material ratio is as follows: weighing the raw materials according to the types and the use amounts of the raw materials shown in Table 1;
2. the preparation method comprises the following steps:
preparation of component A:
mixing and stirring polyurethane modified epoxy resin, a diluent, a liquid phosphate flame retardant and a defoaming agent for 5-10 minutes at 5-10 rpm;
then adding melamine salt powder flame retardant and aluminum hydroxide filler, mixing and stirring for 20-30 minutes at 20-30 rpm, and then carrying out vacuum defoaming for 5 minutes to obtain a component A;
preparation of the component B:
mixing and stirring a curing agent and a curing accelerator for 5-10 minutes at 5-10 rpm, adding a calcium carbonate filler, mixing and stirring for 20-30 minutes at 20-30 rpm, and performing vacuum defoaming for 5 minutes to obtain a component B;
the preparation of the A component and the B component is not limited in sequence.
3. The test method comprises the following steps:
the obtained elastic epoxy flame-retardant pouring sealant is subjected to performance test, and the result is shown in table 1:
the leveling property test method comprises the following steps: GB/T13477.6-2002 test method for building sealing materials part 6 fluidity determination;
the method for testing tensile strength and elongation at break comprises the following steps: GB/T528 vulcanized rubber or thermoplastic rubber tensile stress strain performance measurement;
a Shore hardness test method, namely a GB/T531 rubber pocket durometer indentation hardness test method;
the flame retardant property test method comprises the following steps: GBT 2408-2008 plastic combustion performance measurement horizontal method and vertical method.
TABLE 1 EXAMPLES 1 TO 6 types and amounts of raw materials and results of measurement of Properties
In table 1, the starting materials used in the examples are not specified:
bisphenol a epoxy resin: BE188-90 Changchun chemical industry (Jiangsu) Co., Ltd
Bisphenol F epoxy resin: BF170 Changchun Artificial resin works Ltd
Defoaming agent: AFCONA2020 HAMMENDOCOUNT CHEMICAL CORPORATION
Aluminum hydroxide: v101, Fushan Victorde chemical materials Co Ltd
Calcium carbonate: precipitated calcium carbonate S-CCR-100, Shuangchao calcium industries, Ltd of Jiande
Curing accelerator: DMP-30[ academic name: 2,4,6- (N, N-dimethylaminomethyl) phenol ]; shanghai Duer chemical Co Ltd
The starting materials specifically mentioned:
polyurethane modified epoxy resin:
jeff0211 (epoxy value 0.38. + -. 0.02) Fujie chemical, Inc., example 3/4/5;
102C-4L (epoxy value 0.22. + -. 0.02) constant wound insulation material from Thai, Ex 1/2/6
Epoxy diluent:
XY748 (monofunctional epoxy reactive diluent), example 1/2/3; new remote chemical Co Ltd of Anhui province, China
XY207 (difunctional epoxy reactive diluent), example 4/5/6; new remote chemical Co Ltd of Anhui province, China
Phosphate flame retardant:
BDP-bisphenol a bis (diphenyl) phosphate (zhejiang watson gmbh), example 1/2/3;
TCEP tri β -chloroethyl phosphate thousand island lake luck chemical ltd, example 4/5/6;
melamine flame retardants:
FR106 (melamine urate), Qingdao Haishai chemical Co., ltd, example 1/2/3;
MP (Melamine urate), Gaobao chemical materials, Inc. of old Kouchi, Ex 4/5/6
Amine curing agent:
r2262 (modified alicyclic amine, active hydrogen equivalent 97), example 3/4/5; guangzhou Ruizi chemical Co., Ltd;
r2283 (alicyclic amine, active hydrogen equivalent 62), example 1/2/6; guangzhou Ruizi chemical Co.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. An elastic epoxy flame-retardant pouring sealant is characterized by comprising a component A and a component B,
the component A is prepared from the following raw materials in parts by mass:
80-120 parts by mass of polyurethane modified epoxy resin, wherein the polyurethane modified epoxy resin is a polyurethane prepolymer capped by an epoxy group, the number average molecular weight is 500-1500, and the epoxy value is 0.20-0.4;
5-10 parts by mass of an epoxy resin, wherein the epoxy resin is selected from bisphenol A diglycidyl ether type epoxy resin or bisphenol F diglycidyl ether type epoxy resin, and the epoxy equivalent of the epoxy resin is 160-220;
5-10 parts by mass of an active diluent;
2-4 parts by mass of a defoaming agent;
10-20 parts by mass of a liquid phosphate flame retardant;
50-60 parts by mass of a melamine salt powder flame retardant;
50-80 parts by mass of an aluminum hydroxide filler;
the component B is prepared from the following raw materials in parts by mass:
19-39 parts by mass of a curing agent, wherein the curing agent is an amine curing agent, the Grignard color is less than or equal to 3, and the active hydrogen equivalent is 40-100;
2-5 parts by mass of a curing accelerator selected from aminophenol curing accelerators;
11-28 parts by mass of calcium carbonate filler.
2. The elastomeric epoxy flame retardant pouring sealant according to claim 1, wherein the reactive diluent is selected from monofunctional glycidyl ether type reactive epoxy diluents or difunctional glycidyl ether type reactive epoxy diluents.
3. The elastic flame-retardant epoxy pouring sealant as claimed in claim 1, wherein the melamine salt powder flame retardant is selected from melamine urate or melamine phosphate.
4. The elastic epoxy flame-retardant pouring sealant as claimed in claim 1, wherein the aluminum hydroxide filler is 800-1250 mesh aluminum hydroxide.
5. The elastomeric epoxy fire retardant pouring sealant according to claim 1, wherein the defoamer is selected from silicone free defoamers.
6. A method for preparing the elastic epoxy flame-retardant pouring sealant as claimed in any one of claims 1 to 5, characterized by comprising the following steps:
preparation of component A:
mixing and stirring polyurethane modified epoxy resin, a diluent, a liquid phosphate flame retardant and a defoaming agent for 5-10 minutes at 5-10 rpm;
then adding melamine salt powder flame retardant and aluminum hydroxide filler, mixing and stirring for 20-30 minutes at 20-30 rpm, and then carrying out vacuum defoaming for 5 minutes to obtain a component A;
preparation of the component B:
mixing and stirring a curing agent and a curing accelerator for 5-10 minutes at 5-10 rpm, adding a calcium carbonate filler, mixing and stirring for 20-30 minutes at 20-30 rpm, and performing vacuum defoaming for 5 minutes to obtain a component B;
the preparation of the A component and the B component is not limited in sequence.
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| CN115433532B (en) * | 2022-09-09 | 2023-09-08 | 深圳市安伯斯科技有限公司 | Low-hardness high-toughness double-component epoxy resin pouring sealant and preparation method thereof |
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