CN115926706A - Two-component epoxy pouring sealant suitable for plastic bonding and preparation method thereof - Google Patents
Two-component epoxy pouring sealant suitable for plastic bonding and preparation method thereof Download PDFInfo
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Abstract
The invention provides a double-component epoxy pouring sealant suitable for plastic bonding, which comprises the following components in percentage by volume (0.8-1.2): 1, a component A and a component B; the component A comprises: 20 to 40 parts by weight of bisphenol F type epoxy resin; 5-12 parts by weight of aliphatic modified epoxy resin; 5-20 parts of polyether amine modified epoxy resin; 10-20 parts of reactive epoxy diluent; 25-50 parts by weight of solid flame-retardant powder; 5-20 parts of liquid flame retardant; 0.5-5 parts of white carbon black thixotropic agent; 0.5 to 3 weight portions of liquid defoaming agent; the component B comprises: 30-50 parts of modified fatty amine curing agent; 4-10 parts of polyurethane curing agent; 30-60 parts by weight of solid flame-retardant powder; 5-15 parts of liquid flame retardant; 0.5-5 parts of white carbon black thixotropic agent; 0.3 to 3 weight portions of polymer adhesion promoter; 0.5 to 3 parts by weight of liquid defoaming agent. Compared with the prior art, the double-component epoxy pouring sealant suitable for plastic bonding provided by the invention has the advantages of low raw material cost and excellent product performance, and is particularly suitable for bonding and sealing base materials such as metal, plastic and the like.
Description
Technical Field
The invention relates to the technical field of pouring sealant, in particular to a two-component epoxy pouring sealant suitable for plastic bonding and a preparation method thereof.
Background
Although the epoxy adhesive is called as universal adhesive and has good adhesive property to most base materials, the epoxy resin is rich in hydroxyl and has large polarity, so that the adhesive and sealing effects to the base materials with low surface energy such as PP, PVC, ABS, PC and other plastics are poor, and the failure mode is often interface damage during adhesion. At present, the prior art often adopts a method of adding a silane coupling agent or modifying an epoxy resin by using polyurethane or acrylic resin to increase the adaptability to a plastic substrate. However, although the effect of improving the adhesion of the plastic substrate by modifying the epoxy with the acrylic resin is obvious, the acrylic resin is expensive, has a large odor and is often difficult to bear in the market, and meanwhile, the epoxy and the acrylic glue have the characteristics of hardness and brittleness and are often insufficient in weather resistance; although the polyurethane is used for modifying epoxy, the price is low, and the effect of toughening is achieved, but the performance attenuation is very obvious in the aging process due to the insufficient high-temperature resistance and water resistance of the polyurethane. Therefore, the development of an epoxy potting adhesive product with low cost and excellent performance, which is suitable for bonding and sealing low-surface substrates such as plastics, becomes a technical problem to be solved by technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention aims to provide a two-component epoxy pouring sealant suitable for plastic bonding and a preparation method thereof, and the two-component epoxy pouring sealant suitable for plastic bonding provided by the present invention has characteristics of low raw material cost and excellent product performance, and is suitable for bonding and sealing of base materials such as metal and plastic.
The invention provides a double-component epoxy pouring sealant suitable for plastic bonding, which comprises the following components in percentage by volume (0.8-1.2): 1, a component A and a component B;
the component A comprises:
20 to 40 parts by weight of bisphenol F type epoxy resin;
5-12 parts by weight of aliphatic modified epoxy resin;
5-20 parts of polyether amine modified epoxy resin;
10-20 parts of reactive epoxy diluent;
25-50 parts by weight of solid flame-retardant powder;
5-20 parts of liquid flame retardant;
0.5 to 5 portions of white carbon black thixotropic agent;
0.5 to 3 weight portions of liquid defoamer;
the component B comprises:
30-50 parts of modified fatty amine curing agent;
4-10 parts of polyurethane curing agent;
30-60 parts of solid flame-retardant powder;
5-15 parts of liquid flame retardant;
0.5 to 5 portions of white carbon black thixotropic agent;
0.3 to 3 weight portions of polymer adhesion promoter;
0.5 to 3 parts by weight of liquid defoaming agent.
Preferably, the A component consists of the following components:
22-30 parts by weight of bisphenol F type epoxy resin;
6-10 parts by weight of aliphatic modified epoxy resin;
6-10 parts of polyether amine modified epoxy resin;
14-16 parts of reactive epoxy diluent;
28-32 parts of solid flame-retardant powder;
8-12 parts of liquid flame retardant;
1-3 parts of white carbon black thixotropic agent;
0.8 to 1.2 portions of liquid defoaming agent.
Preferably, the component B consists of the following components:
38-42 parts of modified fatty amine curing agent;
5-7 parts of polyurethane curing agent;
38-42 parts of solid flame-retardant powder;
8-12 parts of liquid flame retardant;
1-3 parts of white carbon black thixotropic agent;
0.5 to 1.5 weight portions of polymer adhesion promoter;
0.8 to 1.2 portions of liquid defoaming agent.
Preferably, the aliphatic modified epoxy resin is selected from one or more of Jiadida XA-545, ADEKA EP-4000 and Guo KSR-177.
Preferably, the polyether amine modified epoxy resin is selected from Jiadida XA-563 and/or Shanghai Macromoly HLM DEP-60.
Preferably, the reactive epoxy diluent is selected from monofunctional aromatic glycidyl ethers and/or castor oil modified glycidyl ethers.
Preferably, the polymeric adhesion promoter is selected from BYK-4510 and/or BYK-4511.
The invention also provides a preparation method of the two-component epoxy pouring sealant suitable for plastic bonding, which comprises the following steps:
a) Stirring and dehydrating bisphenol F type epoxy resin, aliphatic modified epoxy resin, polyether amine modified epoxy resin, reactive epoxy diluent and liquid flame retardant at the temperature of between 70 and 90 ℃ and the rate of between 80 and 120rpm under the condition that the vacuum pumping is less than or equal to-0.09 MPa for 1 to 3 hours; then cooling to be less than or equal to 50 ℃, adding solid flame retardant powder and white carbon black thixotropic agent, adding liquid defoaming agent, vacuumizing to be less than or equal to-0.09 MPa, and continuously stirring at the speed of 180 rpm-220 rpm for 0.5 h-1.5 h to obtain a component A;
b) Stirring and dehydrating the modified aliphatic amine curing agent, the polyurethane curing agent and the liquid flame retardant at the temperature of between 70 and 90 ℃ and the rate of between 80 and 120rpm under the condition that the vacuumizing is less than or equal to minus 0.09MPa for 1 to 3 hours; then cooling to less than or equal to 50 ℃, adding solid flame retardant powder and white carbon black thixotropic agent, adding polymer adhesion promoter and liquid defoaming agent, and continuously stirring for 0.5-1.5 h at the speed of 180-220 rpm under the condition of vacuum pumping to less than or equal to-0.09 MPa to obtain a component B;
c) Mixing the component A and the component B according to the volume ratio (0.8-1.2): 1, uniformly mixing to obtain a two-component epoxy pouring sealant suitable for plastic bonding;
the step a) and the step b) are not limited in order.
Preferably, before the solid flame retardant powder and the white carbon black thixotropic agent are added in the step a), the method further comprises the following steps:
and (3) drying and dehydrating the solid flame-retardant powder and the white carbon black thixotropic agent for 20-30 h in a drying room at the temperature of 90-110 ℃.
Preferably, before the solid flame retardant powder and the white carbon black thixotropic agent are added in the step b), the method further comprises the following steps:
and (3) drying and dehydrating the solid flame-retardant powder and the white carbon black thixotropic agent for 20-30 h in a drying room at the temperature of 90-110 ℃.
The invention provides a double-component epoxy pouring sealant suitable for plastic bonding, which comprises the following components in volume ratio (0.8-1.2): 1, a component A and a component B; the component A comprises: 20 to 40 parts by weight of bisphenol F type epoxy resin; 5-12 parts by weight of aliphatic modified epoxy resin; 5-20 parts of polyether amine modified epoxy resin; 10-20 parts of reactive epoxy diluent; 25-50 parts by weight of solid flame-retardant powder; 5-20 parts of liquid flame retardant; 0.5-5 parts of white carbon black thixotropic agent; 0.5 to 3 weight portions of liquid defoaming agent; the component B comprises: 30-50 parts of modified fatty amine curing agent; 4-10 parts of polyurethane curing agent; 30-60 parts of solid flame-retardant powder; 5-15 parts of liquid flame retardant; 0.5 to 5 portions of white carbon black thixotropic agent; 0.3 to 3 weight portions of polymer adhesion promoter; 0.5 to 3 parts by weight of a liquid defoaming agent. Compared with the prior art, the two-component epoxy pouring sealant suitable for plastic bonding provided by the invention adopts components with specific contents, and realizes better overall interaction; the problems of poor bonding and sealing performance of epoxy pouring sealant products in the existing market on low-surface base materials such as plastics and the like can be solved, and meanwhile, the raw materials are low in cost, the product performance is excellent, and the epoxy pouring sealant is particularly suitable for bonding and sealing base materials such as metals, plastics and the like. Experimental results show that the two-component epoxy pouring sealant suitable for plastic bonding has excellent bonding property on different metals and plastics, specifically, the bonding property of cold-rolled steel and cold-rolled steel can reach 12MPa, the bonding property of 6061/5083/3003 aluminum can reach 10MPa, the self-adhesion and mutual adhesion of PVC/PC/PET/ABS and other plastics can realize the plastic substrate damage, and for the PP substrate which is difficult to bond, the substrate damage can also be realized after the flame treatment is carried out on the surface.
In addition, the preparation method provided by the invention has the advantages of easily available raw materials, low cost, simple operation, mild conditions and wide application prospect.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood 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 obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention provides a double-component epoxy pouring sealant suitable for plastic bonding, which comprises the following components in volume ratio (0.8-1.2): 1, a component A and a component B;
the component A comprises:
20 to 40 parts by weight of bisphenol F type epoxy resin;
5-12 parts by weight of aliphatic modified epoxy resin;
5-20 parts of polyether amine modified epoxy resin;
10-20 parts of reactive epoxy diluent;
25-50 parts by weight of solid flame-retardant powder;
5-20 parts of liquid flame retardant;
0.5-5 parts of white carbon black thixotropic agent;
0.5 to 3 weight portions of liquid defoaming agent;
the component B comprises:
30-50 parts of modified fatty amine curing agent;
4-10 parts of a polyurethane curing agent;
30-60 parts of solid flame-retardant powder;
5-15 parts of liquid flame retardant;
0.5 to 5 portions of white carbon black thixotropic agent;
0.3 to 3 weight portions of polymer adhesion promoter;
0.5 to 3 parts by weight of liquid defoaming agent.
In the invention, the two-component epoxy pouring sealant suitable for plastic bonding comprises the following components in volume ratio (0.8-1.2): 1, preferably the component A and the component B are prepared from (0.8-1.2): 1, more preferably a component and a component B, more preferably a component consisting of, by volume, 1:1, component A and component B.
In the present invention, the a component includes:
20 to 40 parts by weight of bisphenol F type epoxy resin;
5-12 parts by weight of aliphatic modified epoxy resin;
5-20 parts of polyether amine modified epoxy resin;
10-20 parts of reactive epoxy diluent;
25-50 parts by weight of solid flame-retardant powder;
5-20 parts of liquid flame retardant;
0.5-5 parts of white carbon black thixotropic agent;
0.5 to 3 weight portions of liquid defoaming agent;
preferably consisting of:
22-30 parts by weight of bisphenol F type epoxy resin;
6-10 parts by weight of aliphatic modified epoxy resin;
6-10 parts of polyether amine modified epoxy resin;
14-16 parts of reactive epoxy diluent;
28-32 parts of solid flame-retardant powder;
8-12 parts of liquid flame retardant;
1-3 parts of white carbon black thixotropic agent;
0.8 to 1.2 portions of liquid defoaming agent.
In the present invention, the B component includes:
30-50 parts of modified fatty amine curing agent;
4-10 parts of a polyurethane curing agent;
30-60 parts by weight of solid flame-retardant powder;
5-15 parts of liquid flame retardant;
0.5 to 5 portions of white carbon black thixotropic agent;
0.3 to 3 weight portions of polymer adhesion promoter;
0.5 to 3 weight portions of liquid defoaming agent;
preferably consisting of:
38-42 parts of modified fatty amine curing agent;
5-7 parts of a polyurethane curing agent;
38-42 parts of solid flame-retardant powder;
8-12 parts of liquid flame retardant;
1-3 parts of white carbon black thixotropic agent;
0.5 to 1.5 weight portions of polymer adhesion promoter;
0.8 to 1.2 portions of liquid defoaming agent.
The sources of the bisphenol F type epoxy resin, the aliphatic modified epoxy resin, the polyether amine modified epoxy resin, the reactive epoxy diluent, the solid flame retardant powder, the liquid flame retardant, the white carbon black thixotropic agent, the liquid defoaming agent, the modified aliphatic amine curing agent, the polyurethane curing agent and the polymer adhesion promoter are not particularly limited, and the bisphenol F type epoxy resin, the aliphatic modified epoxy resin, the polyether amine modified epoxy resin, the reactive epoxy diluent, the solid flame retardant powder, the liquid flame retardant, the white carbon black thixotropic agent, the liquid defoaming agent, the modified aliphatic amine curing agent, the polyurethane curing agent and the polymer adhesion promoter can be commercially available products well known to those skilled in the art.
In the present invention, the bisphenol F type epoxy resin is preferably NPEF-170 in south Asia.
In the present invention, the aliphatic modified epoxy resin is preferably selected from one or more of Idida XA-545, ADEKA EP-4000 and KsWR-177, more preferably Idida XA-545 or KWR-177.
In the present invention, the polyetheramine modified epoxy resin is preferably selected from the group consisting of Idida XA-563 and/or Shanghai Macroming HLMDEP-60, more preferably Idida XA-563 or Shanghai Macroming HLMDEP-60.
In the present invention, the reactive epoxy diluent is preferably selected from monofunctional aromatic glycidyl ethers and/or castor oil-modified glycidyl ethers, more preferably Shanghai Soft seed REP-105 or Ito GR-5050.
In the invention, the solid flame retardant powder is preferably aluminum hydroxide, and more preferably Foshan gold Go DRHY-210 or Foshan Jin Ge JAZ-198.
In the present invention, the liquid flame retardant is preferably isopropylated triphenyl phosphate IPPP.
In the invention, the white carbon black thixotropic agent is preferably CABOT TS720 or Yingchuang R202.
In the present invention, the liquid antifoaming agent is preferably BYK-1790.
In the present invention, the modified fatty amine curing agent is preferably one or more of Jigao GM-70, jigao J-3041 and Kirginia Qishi H70B, more preferably Jigao GM-70 or Kirginia Qishi H70B.
In the present invention, the polyurethane curing agent is preferably Langshan Trixene BI-7774.
In the invention, the solid flame retardant powder, the liquid flame retardant, the white carbon black thixotropic agent and the liquid defoaming agent in the component B are the same as those in the component A, and are not described again.
In the present invention, the polymeric adhesion promoter is preferably selected from BYK-4510 and/or BYK-4511, more preferably BYK-4510 or BYK-4511.
The adhesion of the epoxy base material to the plastic is a pain point of the industry all the time, but with the progress of light weight, more and more industrial devices and electronic devices select plastic frames to replace metal frames, so that how to improve the adhesion sealing performance of the epoxy adhesive to the plastic base material is an urgent problem to be solved; aiming at the technical problem, the application provides a two-component epoxy pouring sealant suitable for plastic bonding, polyurethane or acrylic acid is not adopted to modify epoxy resin, polyether amine is selected to modify epoxy resin, the flexibility of a system and the wettability of a low-surface-energy substrate are improved, meanwhile, a traditional small-molecule silane coupling agent is not selected, a polymer adhesion promoter is selected, and other specific components with specific contents are matched to realize better overall interaction; the problems of poor bonding and sealing performance of epoxy pouring sealant products in the existing market on low-surface base materials such as plastics and the like can be solved, and meanwhile, the raw materials are low in cost and excellent in product performance, so that the epoxy pouring sealant is particularly suitable for bonding and sealing base materials such as metals, plastics and the like; aiming at the bonding of plastics, particularly PVC (polyvinyl chloride) substrates, a proper surface wetting system is selected, and the interface damage is successfully changed into the substrate damage.
The invention also provides a preparation method of the two-component epoxy pouring sealant suitable for plastic bonding, which comprises the following steps:
a) Stirring and dehydrating bisphenol F type epoxy resin, aliphatic modified epoxy resin, polyether amine modified epoxy resin, reactive epoxy diluent and liquid flame retardant at the temperature of between 70 and 90 ℃ and the rate of between 80 and 120rpm under the condition that the vacuum pumping is less than or equal to-0.09 MPa for 1 to 3 hours; then cooling to be less than or equal to 50 ℃, adding solid flame retardant powder and white carbon black thixotropic agent, adding liquid defoaming agent, vacuumizing to be less than or equal to-0.09 MPa, and continuously stirring at the speed of 180 rpm-220 rpm for 0.5 h-1.5 h to obtain a component A;
b) Stirring and dehydrating the modified aliphatic amine curing agent, the polyurethane curing agent and the liquid flame retardant at the temperature of between 70 and 90 ℃ and the rate of between 80 and 120rpm under the condition that the vacuumizing is less than or equal to minus 0.09MPa for 1 to 3 hours; then cooling to less than or equal to 50 ℃, adding solid flame retardant powder and white carbon black thixotropic agent, adding polymer adhesion promoter and liquid defoaming agent, and continuously stirring for 0.5-1.5 h at the speed of 180-220 rpm under the condition of vacuum pumping to less than or equal to-0.09 MPa to obtain a component B;
c) Mixing the component A and the component B according to the volume ratio (0.8-1.2): 1, uniformly mixing to obtain a two-component epoxy pouring sealant suitable for plastic bonding;
the step a) and the step b) are not limited in order.
In the present invention, before the solid flame retardant powder and the white carbon thixotropic agent are added in step a), it is preferable that the method further comprises:
drying and dehydrating the solid flame-retardant powder and the white carbon black thixotropic agent in a drying room at the temperature of 90-110 ℃ for 20-30 h;
more preferably:
and (3) drying and dehydrating the solid flame-retardant powder and the white carbon black thixotropic agent in a drying room at 100 ℃ for 24 hours.
Similarly, before the solid flame retardant powder and the white carbon black thixotropic agent are added in the step b), the method preferably further comprises the following steps:
drying and dehydrating the solid flame-retardant powder and the white carbon black thixotropic agent in a drying room at the temperature of 90-110 ℃ for 20-30 h;
more preferably:
and (3) drying and dehydrating the solid flame-retardant powder and the white carbon black thixotropic agent in a drying room at 100 ℃ for 24 hours.
The preparation method provided by the invention has the advantages of easily available raw materials, low cost, simple operation, mild conditions and wide application prospect.
The invention provides a double-component epoxy pouring sealant suitable for plastic bonding, which comprises the following components in volume ratio (0.8-1.2): 1, a component A and a component B; the component A comprises: 20 to 40 parts by weight of bisphenol F type epoxy resin; 5-12 parts by weight of aliphatic modified epoxy resin; 5-20 parts of polyether amine modified epoxy resin; 10-20 parts of reactive epoxy diluent; 25-50 parts by weight of solid flame-retardant powder; 5-20 parts of liquid flame retardant; 0.5-5 parts of white carbon black thixotropic agent; 0.5 to 3 weight portions of liquid defoaming agent; the component B comprises: 30-50 parts of modified fatty amine curing agent; 4-10 parts of polyurethane curing agent; 30-60 parts by weight of solid flame-retardant powder; 5-15 parts of liquid flame retardant; 0.5-5 parts of white carbon black thixotropic agent; 0.3 to 3 weight portions of polymer adhesion promoter; 0.5 to 3 parts by weight of liquid defoaming agent. Compared with the prior art, the two-component epoxy pouring sealant suitable for plastic bonding provided by the invention adopts components with specific contents, and realizes better overall interaction; the epoxy pouring sealant can solve the problems of poor bonding and sealing performance of epoxy pouring sealant products in the existing market on low-surface base materials such as plastics and the like, has low raw material cost and excellent product performance, and is particularly suitable for bonding and sealing base materials such as metals, plastics and the like. Experimental results show that the two-component epoxy pouring sealant suitable for plastic bonding has excellent bonding property on different metals and plastics, specifically, the bonding property of cold-rolled steel and cold-rolled steel can reach 12MPa, the bonding property of 6061/5083/3003 aluminum can reach 10MPa, the self-adhesion and mutual adhesion of PVC/PC/PET/ABS and other plastics can realize the plastic substrate damage, and for the PP substrate which is difficult to bond, the substrate damage can also be realized after the flame treatment is carried out on the surface.
In addition, the preparation method provided by the invention has the advantages of easily available raw materials, low cost, simple operation, mild conditions and wide application prospect.
In order to further illustrate the present invention, the following examples are provided for illustrative purposes. The raw materials used in the following examples of the present invention are all commercially available products.
The performance test method adopted by the invention is as follows:
shear strength: GB/T7124-2008, determination of tensile shear strength of adhesives to rigid materials;
body tensile strength: GB/T528-2009, determination of tensile stress strain performance of vulcanized rubber or thermoplastic rubber;
flame retardancy: UL94 flame retardant test method and standard.
Example 1
The component A comprises: 22 parts of NPEF-170 bisphenol F epoxy resin, 10 parts of XA-545 aliphatic modified epoxy resin, 10 parts of XA-563 polyetheramine modified epoxy resin, 15 parts of REP-105 reactive epoxy diluent, 30 parts of Flemingin JAZ-198 aluminum hydroxide flame retardant powder, 10 parts of IPPP liquid flame retardant, 2 parts of CABTTS 720 white carbon black thixotropic agent and 1 part of BYK-1790 liquid defoaming agent;
and B component: 40 parts of Jindaoshi H70B modified fatty amine curing agent, 6 parts of BI-7774 polyurethane curing agent, 30 parts of Foshan Jinggaj-198 aluminum hydroxide flame-retardant powder, 10 parts of IPPP liquid flame retardant, 2 parts of CABOT TS720 white carbon black thixotropic agent, 1 part of BYK-4511 polymer adhesion promoter and 1 part of BYK-1790 liquid defoaming agent.
Example 2
The component A comprises: 30 parts of NPEF-170 bisphenol F epoxy resin, 6 parts of KSR-177 aliphatic modified epoxy resin, 6 parts of DEP-60 polyetheramine modified epoxy resin, 15 parts of GR-5050 active epoxy diluent, 30 parts of Foshan gold Go DRHY-210 aluminum hydroxide flame retardant powder, 10 parts of IPPP liquid flame retardant, 2 parts of Yingchu R202 white carbon black thixotropic agent and 1 part of BYK-1790 liquid defoaming agent;
and the component B comprises: 40 parts of Jiehao GM-70 modified aliphatic amine curing agent, 6 parts of BI-7774 polyurethane curing agent, 30 parts of Foshan gold Go DRHY-210 aluminum hydroxide flame retardant powder, 10 parts of IPPP liquid flame retardant, 2 parts of Yingchuang R202 white carbon black thixotropic agent, 1 part of BYK-4510 polymer adhesion promoter and 1 part of BYK-1790 liquid defoaming agent.
Comparative example 1
The component A comprises: 32 parts of NPEF-170 bisphenol F epoxy resin, 10 parts of XA-545 aliphatic modified epoxy resin, 15 parts of REP-105 active epoxy diluent, 30 parts of Foshan gold Go JAZ-198 aluminum hydroxide flame retardant powder, 10 parts of IPPP liquid flame retardant, 2 parts of CABOT TS720 white carbon black thixotropic agent and 1 part of BYK-1790 liquid defoaming agent;
and B component: 40 parts of Jindao Qishi H70B modified fatty amine curing agent, 6 parts of BI-7774 polyurethane curing agent, 30 parts of Fushan gold ge JAZ-198 aluminum hydroxide flame-retardant powder, 10 parts of IPPP liquid flame retardant, 2 parts of CABOT TS720 white carbon black thixotropic agent, 1 part of BYK-4511 polymer adhesion promoter and 1 part of BYK-1790 liquid defoamer.
Comparative example 2
The component A comprises: 22 parts of NPEF-170 bisphenol F epoxy resin, 10 parts of XA-545 aliphatic modified epoxy resin, 10 parts of XA-563 polyetheramine modified epoxy resin, 15 parts of REP-105 reactive epoxy diluent, 30 parts of Flemingin JAZ-198 aluminum hydroxide flame retardant powder, 10 parts of IPPP liquid flame retardant, 2 parts of CABTTS 720 white carbon black thixotropic agent and 1 part of BYK-1790 liquid defoaming agent;
and B component: 41 parts of Jindaoshi H70B modified fatty amine curing agent, 6 parts of BI-7774 polyurethane curing agent, 30 parts of Foshan Jinggaj-198 aluminum hydroxide flame-retardant powder, 10 parts of IPPP liquid flame retardant, 2 parts of CABOT TS720 white carbon black thixotropic agent and 1 part of BYK-1790 liquid defoaming agent.
The selection and the proportion of the components of examples 1-2 and comparative examples 1-2 are shown in Table 1.
TABLE 1 ingredient selection and proportioning data Table for examples 1-2 and comparative examples 1-2
The preparation method of the two-component epoxy pouring sealant related to the test is as follows:
(1) Firstly, dehydrating required powder materials including solid flame-retardant powder and a white carbon black thixotropic agent in a drying room at 100 ℃ for 24 hours for later use; stirring and dehydrating bisphenol F epoxy resin, aliphatic modified epoxy resin, polyether amine modified epoxy resin, reactive epoxy diluent and liquid flame retardant at 80 ℃ and at 100rpm under the condition of vacuumizing to-0.09 MPa for 2 hours; and then cooling to below 50 ℃, adding the solid flame retardant powder dried in advance and the white carbon black thixotropic agent, adding the liquid defoaming agent, vacuumizing to-0.09 MPa, and continuously stirring at the speed of 200rpm for 1h to obtain the component A.
(2) Firstly, dehydrating required powder materials including solid flame-retardant powder and a white carbon black thixotropic agent in a drying room at 100 ℃ for 24 hours for later use; stirring and dehydrating the modified aliphatic amine curing agent, the polyurethane curing agent and the liquid flame retardant for 2 hours at the temperature of 80 ℃ and the speed of 100rpm under the condition of vacuumizing to-0.09 MPa; and then cooling to below 50 ℃, adding the solid flame retardant powder and the white carbon black thixotropic agent which are dried in advance, adding the polymer adhesion promoter and the liquid defoaming agent, vacuumizing to-0.09 MPa, and continuously stirring at the speed of 200rpm for 1h to obtain the component B.
(3) Mixing the component A and the component B according to the volume ratio of 1:1, uniformly mixing to obtain the double-component epoxy pouring sealant.
In the above test, the component B of examples 1-2 was added with the polymeric adhesion promoter, and the component A was modified with two polyetheramine modified epoxy resins with different molecular weights and epoxy equivalent weights; in comparative examples 1-2, the importance of bonding the two materials to the plastic substrate was investigated by either adding no polyetheramine modified epoxy resin or adding no polymeric adhesion promoter.
The two-component epoxy potting adhesive prepared in the above examples 1 to 2 and comparative examples 1 to 2 was subjected to various performance tests, and the results are shown in table 2.
TABLE 2 Performance data of examples 1-2 and comparative examples 1-2
According to experimental results, the two-component epoxy pouring sealant provided by the invention has the following volume ratio of 1:1, mixing (the curing condition can be normal temperature curing or high temperature accelerated curing), wherein the strength of the cured body is more than 10MPa, the flame retardant property reaches UL94-V0, the self-adhesion and mutual adhesion strength to metal substrates (including cold rolled steel and aluminum) exceeds 10MPa, and the self-adhesion and mutual adhesion to plastic substrates (including PVC, PC, ABS and PET) can realize the destruction of the plastic substrates; in addition, when the polyether amine modified epoxy resin and the adhesion promoter are added simultaneously, the substrate can be damaged when different plastics are bonded, which shows that the formula system is very suitable for sealing and bonding protection of the plastic substrate; if either one of the two is absent, the substrate cannot be destroyed, and interface peeling occurs.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A two-component epoxy pouring sealant suitable for plastic bonding comprises the following components in percentage by volume (0.8-1.2): 1, a component A and a component B;
the component A comprises:
20 to 40 parts by weight of bisphenol F type epoxy resin;
5-12 parts by weight of aliphatic modified epoxy resin;
5-20 parts of polyether amine modified epoxy resin;
10-20 parts of reactive epoxy diluent;
25-50 parts by weight of solid flame-retardant powder;
5-20 parts of liquid flame retardant;
0.5-5 parts of white carbon black thixotropic agent;
0.5 to 3 weight portions of liquid defoaming agent;
the component B comprises:
30-50 parts of modified fatty amine curing agent;
4-10 parts of polyurethane curing agent;
30-60 parts of solid flame-retardant powder;
5-15 parts of liquid flame retardant;
0.5-5 parts of white carbon black thixotropic agent;
0.3 to 3 weight portions of polymer adhesion promoter;
0.5 to 3 parts by weight of a liquid defoaming agent.
2. The two-component epoxy potting adhesive suitable for plastic bonding of claim 1, wherein the a component consists of the following components:
22-30 parts by weight of bisphenol F type epoxy resin;
6-10 parts by weight of aliphatic modified epoxy resin;
6-10 parts of polyether amine modified epoxy resin;
14-16 parts of reactive epoxy diluent;
28-32 parts of solid flame-retardant powder;
8-12 parts of liquid flame retardant;
1-3 parts of white carbon black thixotropic agent;
0.8 to 1.2 portions of liquid defoaming agent.
3. The two-component epoxy potting adhesive suitable for plastic bonding of claim 1, wherein the component B consists of the following components:
38-42 parts of modified fatty amine curing agent;
5-7 parts of polyurethane curing agent;
38-42 parts of solid flame-retardant powder;
8-12 parts of liquid flame retardant;
1-3 parts of white carbon black thixotropic agent;
0.5 to 1.5 weight portions of polymer adhesion promoter;
0.8 to 1.2 portions of liquid defoaming agent.
4. The two-component epoxy potting adhesive suitable for bonding plastics of claim 1, wherein the aliphatic modified epoxy resin is selected from one or more of adida XA-545, ADEKA EP-4000 and guo KSR-177.
5. The two-component epoxy potting adhesive suitable for use in bonding plastics of claim 1, wherein the polyetheramine-modified epoxy resin is selected from adida XA-563 and/or shanghai macrolming HLM DEP-60.
6. The two-component epoxy potting adhesive suitable for use in bonding plastics according to claim 1, wherein the reactive epoxy diluent is selected from monofunctional aromatic glycidyl ethers and/or castor oil-modified glycidyl ethers.
7. The two-component epoxy potting adhesive suitable for use in plastic bonding of claim 1, wherein the polymer adhesion promoter is selected from the group consisting of BYK-4510 and/or BYK-4511.
8. A method for preparing the two-component epoxy pouring sealant suitable for plastic bonding according to any one of claims 1 to 7, comprising the following steps:
a) Stirring and dehydrating bisphenol F type epoxy resin, aliphatic modified epoxy resin, polyether amine modified epoxy resin, reactive epoxy diluent and liquid flame retardant at the temperature of between 70 and 90 ℃ and the rate of between 80 and 120rpm under the condition that the vacuum pumping is less than or equal to-0.09 MPa for 1 to 3 hours; then cooling to be less than or equal to 50 ℃, adding solid flame retardant powder and white carbon black thixotropic agent, adding liquid defoaming agent, vacuumizing to be less than or equal to-0.09 MPa, and continuously stirring at the speed of 180 rpm-220 rpm for 0.5 h-1.5 h to obtain a component A;
b) Stirring and dehydrating the modified aliphatic amine curing agent, the polyurethane curing agent and the liquid flame retardant at the temperature of between 70 and 90 ℃ and the rate of between 80 and 120rpm under the condition that the vacuumizing is less than or equal to minus 0.09MPa for 1 to 3 hours; then cooling to less than or equal to 50 ℃, adding solid flame retardant powder and white carbon black thixotropic agent, adding polymer adhesion promoter and liquid defoaming agent, and continuously stirring for 0.5-1.5 h at the speed of 180-220 rpm under the condition of vacuum pumping to less than or equal to-0.09 MPa to obtain a component B;
c) Mixing the component A and the component B according to the volume ratio (0.8-1.2): 1, uniformly mixing to obtain a two-component epoxy pouring sealant suitable for plastic bonding;
the step a) and the step b) are not limited in order.
9. The preparation method according to claim 8, wherein before the solid flame retardant powder and the white carbon thixotropic agent are added in the step a), the method further comprises the following steps:
and (3) drying and dehydrating the solid flame-retardant powder and the white carbon black thixotropic agent for 20 to 30 hours in a drying room at the temperature of between 90 and 110 ℃.
10. The preparation method according to claim 8, wherein before the solid flame retardant powder and the white carbon black thixotropic agent are added in the step b), the method further comprises the following steps:
and (3) drying and dehydrating the solid flame-retardant powder and the white carbon black thixotropic agent for 20-30 h in a drying room at the temperature of 90-110 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211427230.7A CN115926706A (en) | 2022-11-15 | 2022-11-15 | Two-component epoxy pouring sealant suitable for plastic bonding and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211427230.7A CN115926706A (en) | 2022-11-15 | 2022-11-15 | Two-component epoxy pouring sealant suitable for plastic bonding and preparation method thereof |
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| CN115926706A true CN115926706A (en) | 2023-04-07 |
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| CN202211427230.7A Pending CN115926706A (en) | 2022-11-15 | 2022-11-15 | Two-component epoxy pouring sealant suitable for plastic bonding and preparation method thereof |
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| Country | Link |
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| CN (1) | CN115926706A (en) |
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- 2022-11-15 CN CN202211427230.7A patent/CN115926706A/en active Pending
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