CN114316885A - Modified epoxy resin sealant and preparation method thereof - Google Patents
Modified epoxy resin sealant and preparation method thereof Download PDFInfo
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- CN114316885A CN114316885A CN202210056223.4A CN202210056223A CN114316885A CN 114316885 A CN114316885 A CN 114316885A CN 202210056223 A CN202210056223 A CN 202210056223A CN 114316885 A CN114316885 A CN 114316885A
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Abstract
The invention relates to a modified epoxy resin sealant and a preparation method thereof, wherein the modified epoxy resin sealant comprises A, B components, wherein the A component comprises the following raw materials in parts by weight: 100-120 parts of modified epoxy resin, 10-15 parts of diluent and 0.5-1.2 parts of dispersant; the component B comprises the following raw materials in parts by weight: 80-100 parts of curing agent and 0.2-3 parts of curing accelerator; the polyurethane prepolymer is introduced, and the prepolymer is inserted between epoxy resin as a flexible chain segment, so that the flexibility of the epoxy resin is improved, the toughening effect on the epoxy resin is further achieved, a cardanol derivative is introduced, the flame retardant property of the modified epoxy resin can be improved through the introduced flame retardant group, and the safety of the sealant prepared from the modified epoxy resin is further improved.
Description
Technical Field
The invention belongs to the technical field of sealants, and particularly relates to a modified epoxy resin sealant and a preparation method thereof.
Background
Among a plurality of sealants, the sealant using epoxy resin as a matrix has excellent sealing performance and higher bonding strength, and is widely used for sealing and bonding high-vacuum and high-air-tightness parts in the fields of space navigation, electronics, machinery and the like. The production of epoxy resin monomers in epoxy resin sealants mainly depends on petroleum resources, and bisphenol A, a main raw material for producing bisphenol A type epoxy monomers, seriously harms human health and does not meet the requirements of sustainable development and environmental protection; secondly, the bisphenol A type epoxy resin is flammable due to the fact that the chemical composition of the bisphenol A type epoxy resin is mainly elements such as carbon, hydrogen, oxygen and the like, and has a large fire hazard when being applied; and thirdly, the molecular chain of the bisphenol A epoxy resin is rich in aromatic ring structures, a three-dimensional network structure is formed after curing, and the rigidity of the three-dimensional network structure is further increased, so that the defects of poor impact resistance, easiness in cracking and the like are caused.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a modified epoxy resin sealant and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
the modified epoxy resin sealant comprises A, B components, wherein the component A comprises the following raw materials in parts by weight: 100-120 parts of modified epoxy resin, 10-15 parts of diluent and 0.5-1.2 parts of dispersant; the component B comprises the following raw materials in parts by weight: 80-100 parts of curing agent and 0.2-3 parts of curing accelerator;
the modified epoxy resin is prepared by the following steps:
step S1, adding the dehydrated polyether diol and toluene diisocyanate into a three-neck flask, introducing nitrogen, heating to 85 ℃ while stirring, carrying out heat preservation reaction for 4 hours to obtain a prepolymer, mixing the prepolymer and an epoxy resin oligomer, adding the mixture into a reaction kettle, introducing nitrogen, stirring at a constant speed, heating to 110 ℃, adding dibutyl tin dilaurate, carrying out heat preservation reaction for 2 hours to obtain a primary modified epoxy resin, controlling the molar ratio of the toluene diisocyanate to the polyether diol to be 2: 1, the weight ratio of the prepolymer to the epoxy resin oligomer to be 2: 1, and the using amount of the dibutyl tin dilaurate to be 1.2-1.3% of the weight of the toluene diisocyanate;
in the step S1, polyether diol and toluene diisocyanate react to generate a polyurethane prepolymer, then isocyanate groups on the prepolymer react with alcoholic hydroxyl groups on the epoxy resin oligomer under the action of a catalyst dibutyl tin dilaurate to prepare a primary modified epoxy resin, and the prepolymer is inserted between the epoxy resins as a flexible chain segment by introducing the polyurethane prepolymer, so that the flexibility of the epoxy resins is improved, and the epoxy resins are toughened.
Step S2, adding the cardanol derivative into the primary modified epoxy resin, stirring at a constant speed for 15min at 100 ℃, then adding 4,4 '-diaminodiphenylmethane, and mixing uniformly to obtain the modified epoxy resin, wherein the weight ratio of the cardanol derivative to the primary modified epoxy resin is controlled to be 1-1.5: 10, and the amount of the 4, 4' -diaminodiphenylmethane is 1-1.2% of the weight of the primary modified epoxy resin.
In step S2, the cardanol derivative is blended with the primary modified epoxy resin to prepare a modified epoxy resin.
Further: the epoxy resin oligomer is prepared by the following steps:
adding resveratrol and epoxy chloropropane into a four-neck flask, heating to 110 ℃, uniformly stirring and reacting for 2h, then slowly dropwise adding a sodium hydroxide solution with the mass fraction of 15%, stirring at a high speed and reacting for 4h, adding ferric trichloride, continuously stirring and reacting for 2h, cooling to room temperature after the reaction is finished, extracting an organic phase with dichloromethane, standing and separating, removing a water phase, washing with deionized water for three times, drying with magnesium sulfate, filtering, performing rotary evaporation, and drying at 65 ℃ for 24h to obtain an epoxy resin oligomer, wherein the dosage ratio of the resveratrol, the epoxy chloropropane, the ferric trichloride and the sodium hydroxide solution is controlled to be 22.5-22.8 g: 55.0-55.5 g: 2 g: 50 mL;
under the alkaline condition, resveratrol and epoxy chloropropane are subjected to polycondensation, phenolic hydroxyl on the resveratrol is converted into glycidyl ether, an epoxy resin oligomer is prepared, the introduced resveratrol structure contains a stilbene group, certain rigidity can be provided for a prepolymer and an epoxy crosslinking system, and the double bonds of the vinyl groups are very stable due to the steric hindrance of benzene rings on two sides. Meanwhile, the glycidyl group in the oligomer is a flexible chain segment, so that the viscosity of the resin can be effectively reduced, and the processability can be improved.
Further: the cardanol derivative is prepared by the following steps:
step S21, adding cardanol, triethylamine and phosphorus oxychloride into chloroform in sequence, carrying out reflux reaction for 4 hours, cooling to room temperature after the reaction is finished, filtering, carrying out rotary evaporation to remove the solvent, washing with deionized water for three times to obtain an intermediate 1, and controlling the dosage ratio of cardanol, triethylamine, phosphorus oxychloride and chloroform to be 0.2-0.3 mol: 0.1 mol: 250 mL;
step S22, adding the intermediate 1 and 3-chloroperoxybenzoic acid into dichloromethane, stirring at a constant speed in an ice water bath, reacting for 3 hours, filtering after the reaction is finished, washing the filtrate with sodium carbonate solution with the mass fraction of 15% and deionized water for three times respectively, and removing the solvent by rotary evaporation to obtain an intermediate 2, wherein the molar ratio of the intermediate 1 to the 3-chloroperoxybenzoic acid is 1: 5;
step S23, adding the intermediate 2 and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide into a three-neck flask, heating to 160 ℃, and carrying out heat preservation reaction for 6 hours to obtain the cardanol derivative, wherein the molar ratio of the intermediate 2 to the 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide is controlled to be 1: 6.
Reacting the cashew phenol with phosphorus oxychloride in the step S21, performing chlorination reaction on the phosphorus oxychloride and a phenolic hydroxyl group on the cardanol to form an intermediate 1, then reacting the intermediate 1 with 3-chloroperoxybenzoic acid to epoxidize a branched chain group on the intermediate 1 to form an intermediate 2, performing ring-opening reaction on the intermediate 1 and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide in the step S23, and grafting the intermediate 2 with the obtained product to prepare the cardanol derivative, wherein the introduced flame retardant group can improve the flame retardant property of the modified epoxy resin.
Further: the diluent is formed by mixing trimethylolpropane triglycidyl ether and C12-14 aliphatic glycidyl ether according to the weight ratio of 1: 0.5-0.8, and the dispersing agent is any one of tetrabutylammonium acetate and tetrapropylammonium acetate.
A preparation method of a modified epoxy resin sealant comprises the following steps:
adding the modified epoxy resin, the diluent and the dispersant into a reaction kettle, stirring at a high speed, heating to 55-65 ℃, carrying out heat preservation reaction for 30min, cooling and discharging to obtain a component A;
adding the curing agent and the curing accelerator into a stirring kettle, heating to 60-80 ℃, and stirring at a high speed for 30min to obtain the component B.
The invention has the beneficial effects that:
the modified epoxy resin sealant takes modified epoxy resin as a matrix, resveratrol and epoxy chloropropane are subjected to polycondensation in the preparation process, phenolic hydroxyl groups on the resveratrol are converted into glycidyl ether, an epoxy resin oligomer is prepared, the introduced resveratrol structure contains stilbene groups, a certain rigidity can be provided for a prepolymer and an epoxy crosslinking system, and the steric hindrance of benzene rings on two sides ensures that double bonds of the vinyl groups are very stable. Simultaneously, the glycidyl group in the oligomer is a flexible chain segment, the viscosity of the resin can be effectively reduced, the processability is improved, and bisphenol A is not adopted as a raw material, the requirements of environmental protection and sustainable development are met, a polyurethane prepolymer is introduced, the prepolymer is inserted between epoxy resin as the flexible chain segment, the flexibility of the epoxy resin is improved, the toughening effect on the epoxy resin is further realized, a cardanol derivative is introduced, the flame retardant property of the modified epoxy resin can be improved through the introduced flame retardant group, and the safety of the sealant prepared through the modified epoxy resin is further improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The modified epoxy resin is prepared by the following steps:
adding resveratrol and epoxy chloropropane into a four-neck flask, heating to 110 ℃, uniformly stirring and reacting for 2h, then slowly dropwise adding a sodium hydroxide solution with the mass fraction of 15%, stirring at a high speed and reacting for 4h, adding ferric trichloride, continuously stirring and reacting for 2h, cooling to room temperature after the reaction is finished, extracting an organic phase with dichloromethane, standing, separating liquid, removing a water phase, washing with deionized water for three times, drying with magnesium sulfate, filtering, performing rotary evaporation, and drying at 65 ℃ for 24h to obtain an epoxy resin oligomer, wherein the dosage ratio of the resveratrol, the epoxy chloropropane, the ferric trichloride and the sodium hydroxide solution is controlled to be 22.5 g: 55.0 g: 2 g: 50 mL;
adding dehydrated polyether diol and toluene diisocyanate into a three-neck flask, introducing nitrogen, heating to 85 ℃ while stirring, carrying out heat preservation reaction for 4 hours to obtain a prepolymer, mixing the prepolymer and an epoxy resin oligomer, adding the mixture into a reaction kettle, introducing nitrogen, stirring at a constant speed, heating to 110 ℃, adding dibutyl tin dilaurate, carrying out heat preservation reaction for 2 hours to obtain a primary modified epoxy resin, controlling the molar ratio of the toluene diisocyanate to the polyether diol to be 2: 1, the weight ratio of the prepolymer to the epoxy resin oligomer to be 2: 1, and the using amount of the dibutyl tin dilaurate to be 1.2% of the weight of the toluene diisocyanate;
adding the cardanol derivative into the primary modified epoxy resin, stirring at a constant speed of 100 ℃ for 15min, then adding 4,4 '-diaminodiphenylmethane, and mixing uniformly to obtain the modified epoxy resin, wherein the weight ratio of the cardanol derivative to the primary modified epoxy resin is controlled to be 1: 10, and the using amount of the 4, 4' -diaminodiphenylmethane is 1% of the weight of the primary modified epoxy resin.
Example 2
The modified epoxy resin is prepared by the following steps:
adding resveratrol and epoxy chloropropane into a four-neck flask, heating to 110 ℃, uniformly stirring and reacting for 2h, then slowly dropwise adding a sodium hydroxide solution with the mass fraction of 15%, stirring at a high speed and reacting for 4h, adding ferric trichloride, continuously stirring and reacting for 2h, cooling to room temperature after the reaction is finished, extracting an organic phase with dichloromethane, standing, separating liquid, removing a water phase, washing with deionized water for three times, drying with magnesium sulfate, filtering, performing rotary evaporation, and drying at 65 ℃ for 24h to obtain an epoxy resin oligomer, wherein the dosage ratio of the resveratrol, the epoxy chloropropane, the ferric trichloride and the sodium hydroxide solution is controlled to be 22.6 g: 55.2 g: 2 g: 50 mL;
adding dehydrated polyether diol and toluene diisocyanate into a three-neck flask, introducing nitrogen, heating to 85 ℃ while stirring, carrying out heat preservation reaction for 4 hours to obtain a prepolymer, mixing the prepolymer and an epoxy resin oligomer, adding the mixture into a reaction kettle, introducing nitrogen, stirring at a constant speed, heating to 110 ℃, adding dibutyl tin dilaurate, carrying out heat preservation reaction for 2 hours to obtain a primary modified epoxy resin, controlling the molar ratio of the toluene diisocyanate to the polyether diol to be 2: 1, the weight ratio of the prepolymer to the epoxy resin oligomer to be 2: 1, and the using amount of the dibutyl tin dilaurate to be 1.2% of the weight of the toluene diisocyanate;
adding the cardanol derivative into the primary modified epoxy resin, stirring at a constant speed of 100 ℃ for 15min, then adding 4,4 '-diaminodiphenylmethane, and mixing uniformly to obtain the modified epoxy resin, wherein the weight ratio of the cardanol derivative to the primary modified epoxy resin is controlled to be 1.2: 10, and the amount of the 4, 4' -diaminodiphenylmethane is 1% of the weight of the primary modified epoxy resin.
Example 3
The modified epoxy resin is prepared by the following steps:
adding resveratrol and epoxy chloropropane into a four-neck flask, heating to 110 ℃, uniformly stirring and reacting for 2h, then slowly dropwise adding a sodium hydroxide solution with the mass fraction of 15%, stirring at a high speed and reacting for 4h, adding ferric trichloride, continuously stirring and reacting for 2h, cooling to room temperature after the reaction is finished, extracting an organic phase with dichloromethane, standing, separating liquid, removing a water phase, washing with deionized water for three times, drying with magnesium sulfate, filtering, performing rotary evaporation, and drying at 65 ℃ for 24h to obtain an epoxy resin oligomer, wherein the dosage ratio of the resveratrol, the epoxy chloropropane, the ferric trichloride and the sodium hydroxide solution is controlled to be 22.8 g: 55.5 g: 2 g: 50 mL;
adding dehydrated polyether diol and toluene diisocyanate into a three-neck flask, introducing nitrogen, heating to 85 ℃ while stirring, carrying out heat preservation reaction for 4 hours to obtain a prepolymer, mixing the prepolymer and an epoxy resin oligomer, adding the mixture into a reaction kettle, introducing nitrogen, stirring at a constant speed, heating to 110 ℃, adding dibutyl tin dilaurate, carrying out heat preservation reaction for 2 hours to obtain a primary modified epoxy resin, controlling the molar ratio of the toluene diisocyanate to the polyether diol to be 2: 1, the weight ratio of the prepolymer to the epoxy resin oligomer to be 2: 1, and the using amount of the dibutyl tin dilaurate to be 1.3% of the weight of the toluene diisocyanate;
adding the cardanol derivative into the primary modified epoxy resin, stirring at a constant speed of 100 ℃ for 15min, then adding 4,4 '-diaminodiphenylmethane, and mixing uniformly to obtain the modified epoxy resin, wherein the weight ratio of the cardanol derivative to the primary modified epoxy resin is controlled to be 1.5: 10, and the using amount of the 4, 4' -diaminodiphenylmethane is 1.2% of the weight of the primary modified epoxy resin.
Example 4
The modified epoxy resin sealant comprises A, B components, wherein the component A comprises the following raw materials in parts by weight: 100 parts of modified epoxy resin, 10 parts of diluent and 0.5 part of tetrabutylammonium acetate; the component B comprises the following raw materials in parts by weight: 80 parts of methyltetrahydrophthalic anhydride, 0.2 part of 2-methylimidazole;
the modified epoxy resin sealant is prepared by the following steps:
adding the modified epoxy resin, the diluent and tetrabutylammonium acetate into a reaction kettle, stirring at a high speed, heating to 55 ℃, carrying out heat preservation reaction for 30min, cooling and discharging to obtain a component A;
adding methyl tetrahydrophthalic anhydride and 2-methylimidazole into a stirring kettle, heating to 60 ℃, and stirring at high speed for 30min to obtain the component B.
The diluent is prepared by mixing trimethylolpropane triglycidyl ether and C12-14 aliphatic glycidyl ether according to the weight ratio of 1: 0.5.
Example 5
The modified epoxy resin sealant comprises A, B components, wherein the component A comprises the following raw materials in parts by weight: 110 parts of modified epoxy resin, 12 parts of diluent and 1 part of tetrabutylammonium acetate; the component B comprises the following raw materials in parts by weight: 90 parts of methyltetrahydrophthalic anhydride, 1.5 parts of 2-methylimidazole;
the modified epoxy resin sealant is prepared by the following steps:
adding the modified epoxy resin, the diluent and tetrabutylammonium acetate into a reaction kettle, stirring at a high speed, heating to 60 ℃, carrying out heat preservation reaction for 30min, cooling and discharging to obtain a component A;
adding methyl tetrahydrophthalic anhydride and 2-methylimidazole into a stirring kettle, heating to 70 ℃, and stirring at high speed for 30min to obtain the component B.
The diluent is prepared by mixing trimethylolpropane triglycidyl ether and C12-14 aliphatic glycidyl ether according to the weight ratio of 1: 0.7.
Example 6
The modified epoxy resin sealant comprises A, B components, wherein the component A comprises the following raw materials in parts by weight: 120 parts of modified epoxy resin, 15 parts of diluent and 1.2 parts of tetrabutylammonium acetate; the component B comprises the following raw materials in parts by weight: 100 parts of methyltetrahydrophthalic anhydride, 3 parts of 2-methylimidazole;
the modified epoxy resin sealant is prepared by the following steps:
adding the modified epoxy resin, the diluent and tetrabutylammonium acetate into a reaction kettle, stirring at a high speed, heating to 65 ℃, carrying out heat preservation reaction for 30min, cooling and discharging to obtain a component A;
adding methyl tetrahydrophthalic anhydride and 2-methylimidazole into a stirring kettle, heating to 80 ℃, and stirring at high speed for 30min to obtain the component B.
The diluent is prepared by mixing trimethylolpropane triglycidyl ether and C12-14 aliphatic glycidyl ether according to the weight ratio of 1: 0.8.
Comparative example 1
This comparative example compared with example 4, the bisphenol A type epoxy resin was used in place of the modified epoxy resin.
Comparative example 2
Compared with example 4, the modified epoxy resin is polyurethane modified epoxy resin.
The sealant prepared in the examples 4-6 and the comparative examples 1-2 is cured to prepare a rubber cake, and the mechanical properties of the sealant are detected by GB/T1040-2006, and the results are shown in the following table;
it can be seen from the above table that the epoxy resin cakes prepared in examples 4-6 of the present invention have excellent mechanical properties of toughness.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (7)
1. The modified epoxy resin sealant comprises A, B components and is characterized in that: the component A comprises the following raw materials in parts by weight: 100-120 parts of modified epoxy resin, 10-15 parts of diluent and 0.5-1.2 parts of dispersant; the component B comprises the following raw materials in parts by weight: 80-100 parts of curing agent and 0.2-3 parts of curing accelerator;
the modified epoxy resin is prepared by the following steps:
step S1, adding the dehydrated polyether diol and toluene diisocyanate into a three-neck flask, introducing nitrogen, heating to 85 ℃ while stirring, carrying out heat preservation reaction for 4 hours to obtain a prepolymer, mixing the prepolymer and an epoxy resin oligomer, adding the mixture into a reaction kettle, introducing nitrogen, stirring at a constant speed, heating to 110 ℃, adding dibutyl tin dilaurate, and carrying out heat preservation reaction for 2 hours to obtain a primary modified epoxy resin;
and step S2, adding the cardanol derivative into the primary modified epoxy resin, stirring at a constant speed for 15min at 100 ℃, then adding 4, 4' -diaminodiphenylmethane, and mixing uniformly to obtain the modified epoxy resin.
2. The modified epoxy resin sealant as claimed in claim 1, wherein: in the step S1, the molar ratio of the toluene diisocyanate to the polyether diol is controlled to be 2: 1, the weight ratio of the prepolymer to the epoxy resin oligomer is 2: 1, the dosage of the dibutyl tin dilaurate is 1.2-1.3% of the weight of the toluene diisocyanate, in the step S2, the weight ratio of the cardanol derivative to the primary modified epoxy resin is controlled to be 1-1.5: 10, and the dosage of the 4, 4' -diamino diphenylmethane is 1-1.2% of the weight of the primary modified epoxy resin.
3. The modified epoxy resin sealant as claimed in claim 1, wherein: the epoxy resin oligomer is prepared by the following steps:
adding resveratrol and epoxy chloropropane into a four-neck flask, heating to 110 ℃, uniformly stirring and reacting for 2h, then slowly dropwise adding a sodium hydroxide solution, stirring at a high speed and reacting for 4h, adding ferric trichloride, continuously stirring and reacting for 2h, cooling to room temperature after the reaction is finished, extracting an organic phase, standing, separating liquid, removing an aqueous phase, washing with deionized water for three times, then drying with magnesium sulfate, filtering, performing rotary evaporation, and drying at 65 ℃ for 24h to obtain the epoxy resin oligomer.
4. The modified epoxy resin sealant as claimed in claim 1, wherein: the cardanol derivative is prepared by the following steps:
step S21, adding cardanol, triethylamine and phosphorus oxychloride into chloroform in sequence, carrying out reflux reaction for 4 hours, cooling to room temperature after the reaction is finished, filtering, carrying out rotary evaporation to remove the solvent, and washing with deionized water for three times to obtain an intermediate 1;
step S22, adding the intermediate 1 and 3-chloroperoxybenzoic acid into dichloromethane, stirring at a constant speed in an ice water bath, reacting for 3 hours, filtering after the reaction is finished, washing the filtrate with sodium carbonate solution with the mass fraction of 15% and deionized water for three times respectively, and removing the solvent by rotary evaporation to obtain an intermediate 2;
and step S23, adding the intermediate 2 and 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide into a three-neck flask, heating to 160 ℃, and carrying out heat preservation reaction for 6 hours to obtain the cardanol derivative.
5. The modified epoxy resin sealant as claimed in claim 4, wherein: in the step S21, the dosage ratio of cardanol, triethylamine, phosphorus oxychloride and chloroform is controlled to be 0.2-0.3 mol: 0.1 mol: 250mL, and in the step S22, the molar ratio of the intermediate 1 to 3-chloroperoxybenzoic acid is controlled to be 1: 5.
6. The modified epoxy resin sealant as claimed in claim 1, wherein: the diluent is formed by mixing trimethylolpropane triglycidyl ether and C12-14 aliphatic glycidyl ether according to the weight ratio of 1: 0.5-0.8, and the dispersing agent is any one of tetrabutylammonium acetate and tetrapropylammonium acetate.
7. The method for preparing the modified epoxy resin sealant according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
adding the modified epoxy resin, the diluent and the dispersant into a reaction kettle, stirring at a high speed, heating to 55-65 ℃, carrying out heat preservation reaction for 30min, cooling and discharging to obtain a component A;
adding the curing agent and the curing accelerator into a stirring kettle, heating to 60-80 ℃, and stirring at a high speed for 30min to obtain the component B.
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| CN202210056223.4A CN114316885A (en) | 2022-01-18 | 2022-01-18 | Modified epoxy resin sealant and preparation method thereof |
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| CN202210056223.4A CN114316885A (en) | 2022-01-18 | 2022-01-18 | Modified epoxy resin sealant and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115230287A (en) * | 2022-07-20 | 2022-10-25 | 广德华昌新材料有限公司 | Preparation method of copper-clad plate |
| CN116162441A (en) * | 2023-03-29 | 2023-05-26 | 广州宝捷电子材料科技有限公司 | Composite modified epoxy resin adhesive and preparation method thereof |
| CN116218450A (en) * | 2023-03-15 | 2023-06-06 | 广东绿树环保涂料科技有限公司 | Mildew-proof joint beautifying agent and preparation method thereof |
| CN116463091A (en) * | 2023-03-20 | 2023-07-21 | 广州宝捷电子材料科技有限公司 | Double-component weather-resistant epoxy adhesive and preparation method thereof |
-
2022
- 2022-01-18 CN CN202210056223.4A patent/CN114316885A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115230287A (en) * | 2022-07-20 | 2022-10-25 | 广德华昌新材料有限公司 | Preparation method of copper-clad plate |
| CN115230287B (en) * | 2022-07-20 | 2024-04-02 | 广德华昌新材料有限公司 | Preparation method of copper-clad plate |
| CN116218450A (en) * | 2023-03-15 | 2023-06-06 | 广东绿树环保涂料科技有限公司 | Mildew-proof joint beautifying agent and preparation method thereof |
| CN116463091A (en) * | 2023-03-20 | 2023-07-21 | 广州宝捷电子材料科技有限公司 | Double-component weather-resistant epoxy adhesive and preparation method thereof |
| CN116463091B (en) * | 2023-03-20 | 2023-11-14 | 广州宝捷电子材料科技有限公司 | Double-component weather-resistant epoxy adhesive and preparation method thereof |
| CN116162441A (en) * | 2023-03-29 | 2023-05-26 | 广州宝捷电子材料科技有限公司 | Composite modified epoxy resin adhesive and preparation method thereof |
| CN116162441B (en) * | 2023-03-29 | 2023-09-19 | 广州宝捷电子材料科技有限公司 | Composite modified epoxy resin adhesive and preparation method thereof |
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