CN115785877A - Strong-corrosion-resistance ultralow-temperature bonding adhesive and preparation method and application thereof - Google Patents
Strong-corrosion-resistance ultralow-temperature bonding adhesive and preparation method and application thereof Download PDFInfo
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- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical group COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 3
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- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to the technical field of ultralow-temperature bonding glue, and provides strong-corrosion-resistance ultralow-temperature bonding glue and a preparation method and application thereof. The ultralow-temperature adhesive comprises independently packaged core components and curing components: the core components are as follows: 50-90 parts of hyperbranched aspartic polyurea resin; 6-40 parts of an organic solvent; 0.01-0.1 part of catalyst; 0.8-10 parts of nano toughening rust inhibitor; 0.1-1 part of silane coupling agent; 5-10 parts of a nano antibacterial agent; 0.2-0.5 part of defoaming agent; the curing components are as follows: 40-100 parts of isocyanate curing agent; 0-50 parts of organic solvent. The strong corrosion-resistant ultralow-temperature adhesive provided by the invention can be used on the surface of stainless steel equipment filled with ultralow-temperature liquid for a long time, can resist high and low temperature impact, has super-strong corrosion resistance, can be applied to severe corrosion conditions such as marine environment and the like for a long time, and can play a stable dual role in cold insulation and corrosion prevention for a long time.
Description
Technical Field
The invention relates to the technical field of ultralow-temperature bonding glue, in particular to high-corrosion-resistance ultralow-temperature bonding glue and a preparation method and application thereof.
Background
With the development of industry and the change of energy structures in China, the demand of ultralow-temperature storage and transportation equipment such as liquefied natural gas, liquid hydrogen and the like is increasing day by day, equipment such as ultralow-temperature storage tanks, pipelines and the like needs to be strictly cooled and protected from corrosion by adopting heat insulation materials, and the surface of a metal base material and the layers of the heat insulation materials are generally protected by adhesion by adopting low-temperature glue. The conventional low-temperature adhesive at present has the following technical problems: 1) The common low-temperature adhesive has insufficient ultralow temperature resistance and high-low temperature impact resistance, has insufficient adhesive force with the surface of a metal base material, and is easy to crack or fall off; 2) The general low-temperature adhesive has poor waterproof and anti-corrosion performance, and condensed water or environmental water can be accumulated on the interface of the insulating layer and the metal substrate, so that local corrosion of metal pipelines or storage tank equipment can be caused, particularly, the corrosion speed of crevice corrosion is high, the concealment is strong, the crevice corrosion is difficult to detect, and sudden corrosion accidents are often caused.
In summary, the current low-temperature adhesive has weak surface adhesion and poor corrosion resistance, and cannot meet the actual requirements.
Disclosure of Invention
Aiming at the problems, the invention aims to provide the strong corrosion-resistant ultralow-temperature bonding adhesive and the preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a strong corrosion-resistant ultralow-temperature adhesive, which comprises independently packaged core components and curing components:
the core component comprises the following components in parts by mass:
50-90 parts of hyperbranched aspartic polyurea resin;
6-40 parts of an organic solvent;
0.01-0.1 part of catalyst;
0.8-10 parts of nano toughening rust inhibitor;
0.1-1 part of silane coupling agent;
5-10 parts of a nano antibacterial agent;
0.2-0.5 part of defoaming agent;
the curing component comprises the following components in parts by mass:
40-100 parts of isocyanate curing agent;
0-50 parts of organic solvent.
Preferably, the terminal groups of the hyperbranched aspartic polyurea resin comprise amino groups, and the density of the hyperbranched aspartic polyurea resin is 0.95-1.05 g/mL.
Preferably, the organic solvent in the core component and the organic solvent in the curing component are independently one or two of n-butyl acetate and propylene glycol methyl ether acetate; the catalyst is one or two of organic tin or organic bismuth.
Preferably, the nano toughening rust inhibitor is obtained by modifying a mixture of reduced graphene oxide and a multi-walled carbon nanotube by a modifier; the modifier is bis [3- (triethoxysilyl) propyl ] amine; the sheet diameter of the reduced graphene oxide is 1-5 mu m; the pipe diameter of the multi-wall carbon nano-tube is 10-30 nm, and the pipe length is 1-20 mu m.
Preferably, the silane coupling agent is vinyl tri (beta-methoxyethoxy) silane; the nano antibacterial agent is obtained by modifying a compound of nano copper, nano zinc and nano silver through mussel protein; the grain diameters of the nano copper, the nano zinc and the nano silver are independently 50-300 nm.
Preferably, the defoaming agent is a BYK-1790 defoaming agent; the isocyanate curing agent is one or two of Toluene Diisocyanate (TDI) and polymethylene polyphenyl polyisocyanate (PAPI).
The invention also provides a preparation method of the strong corrosion-resistant ultralow-temperature adhesive cement, which comprises the following steps:
carrying out first mixing on components contained in a core component to obtain the core component;
and carrying out second mixing on the components contained in the curing component to obtain the curing component.
The invention also provides the application of the strong corrosion-resistant ultralow-temperature adhesive in the technical scheme on the surface of low-temperature equipment.
Preferably, the application method comprises the following steps:
(1) Mixing the core component with the curing component to obtain a bonding adhesive;
(2) And coating the bonding glue on the surface of low-temperature equipment for curing to obtain the strong corrosion-resistant ultralow-temperature protective layer.
Preferably, the mass ratio of the core component to the curing component is 1; the thickness of the coating is 50-500 mu m; the curing temperature is normal temperature.
The invention provides a strong corrosion-resistant ultralow-temperature adhesive, which comprises independently packaged core components and curing components: the core component comprises the following components in parts by mass: 50-90 parts of hyperbranched aspartic polyurea resin; 6-40 parts of an organic solvent; 0.01-0.1 part of catalyst; 0.8-10 parts of nano toughening rust inhibitor; 0.1-1 part of silane coupling agent; 5-10 parts of a nano antibacterial agent; 0.2-0.5 part of defoaming agent; the curing component comprises the following components in parts by mass: 40-100 parts of isocyanate curing agent; 0-50 parts of organic solvent. The invention utilizes the synergistic effect of the hyperbranched asparagus polyurea resin and the nano toughening rust inhibitor to ensure that the prepared strong corrosion-resistant ultralow-temperature adhesive has strong adhesive force to a metal base material and excellent temperature change resistance and ultralow temperature resistance; according to the invention, a proper amount of nano toughening rust inhibitor is added, so that the toughness and strength of the adhesive can be obviously improved, the permeability resistance of a polymer film layer is enhanced, the corrosion resistance of the low-temperature adhesive is improved, the elasticity and elongation of the adhesive can be improved, and the ultralow temperature performance and high and low temperature impact resistance of the adhesive are obviously enhanced; the nano antibacterial agent is adopted, so that the adhesive has good antibacterial and bacteriostatic properties, and the mechanical property of a protective layer obtained after the adhesive is cured is optimized; a small amount of organic solvent is used for adjusting the fluidity and the workability of the adhesive; the catalyst is used for promoting the chemical reaction between the core component and the curing component, realizing good crosslinking and improving the compactness and the mechanical property of the bonding adhesive; the silane coupling agent is used for enhancing the surface adhesive force of the adhesive; the defoaming agent is used for eliminating foams generated in the stirring process of the adhesive glue. According to the invention, through the matching of the components, the epoxy resin-based low-temperature adhesive has more excellent adhesive force, super-strong waterproof performance and corrosion resistance compared with the traditional low-temperature adhesives such as epoxy resin-based low-temperature adhesives, poly-amino acid resin-based low-temperature adhesives and the like.
The strong corrosion-resistant ultralow-temperature adhesive provided by the invention can be used on the surface of stainless steel equipment filled with liquid nitrogen, liquefied natural gas or liquid hydrogen for a long time, can resist high and low temperature impact, has super-strong corrosion resistance, can be applied to severe corrosion conditions such as marine environment for a long time, can play a stable dual role in cold insulation and corrosion prevention for a long time, and has excellent environment resistance. Meanwhile, the strong corrosion-resistant ultralow-temperature adhesive can be cured at normal temperature, is adjustable in curing speed, is simple and convenient compared with the conventional low-temperature adhesive which needs heating curing, and has an excellent construction effect.
Detailed Description
The invention provides a strong corrosion-resistant ultralow-temperature adhesive, which comprises independently packaged core components and curing components:
the core component comprises the following components in parts by mass:
50-90 parts of hyperbranched aspartic polyurea resin;
6-40 parts of an organic solvent;
0.01-0.1 part of catalyst;
0.8-10 parts of nano toughening rust inhibitor;
0.1-1 part of silane coupling agent;
5-10 parts of a nano antibacterial agent;
0.2-0.5 part of defoaming agent;
the curing component comprises the following components in parts by mass:
40-100 parts of isocyanate curing agent;
0-50 parts of organic solvent.
In the present invention, unless otherwise specified, each of the substances is a commercially available product well known to those skilled in the art.
The core component comprises 50-90 parts by mass of hyperbranched aspartic polyurea resin, preferably 70-80 parts by mass. In the present invention, the terminal group of the hyperbranched aspartic polyurea resin preferably comprises an amino group, the density of the hyperbranched aspartic polyurea resin is preferably 0.95-1.05 g/mL, and in a specific embodiment of the present invention, the hyperbranched aspartic polyurea resin is from Shenzhen flying Jun research New materials GmbH.
Based on the mass portion of the hyperbranched aspartic polyurea resin, the core component comprises 6 to 40 portions of organic solvent, preferably 10 to 20 portions; the organic solvent is preferably one or two of n-butyl acetate and propylene glycol methyl ether acetate.
Based on the mass portion of the hyperbranched aspartic polyurea resin, the core component comprises 0.01 to 0.1 portion of catalyst, preferably 0.02 to 0.08 portion; the catalyst is preferably one or two of organic tin or organic bismuth; the organotin is preferably dibutyltin dilaurate; in a specific embodiment of the invention, the dibutyltin dilaurate is DY-12, and the organic bismuth is DY-20.
Based on the mass portion of the hyperbranched aspartic polyurea resin, the core component comprises 0.8 to 10 portions of nano toughening rust inhibitor, preferably 1 to 5 portions; the nano toughening rust inhibitor is preferably obtained by modifying a mixture of Reduced Graphene Oxide (RGO) and multi-walled carbon nanotubes (MWCNTs) by a modifier; the modifier is preferably bis [3- (triethoxysilyl) propyl ] amine; the sheet diameter of the reduced graphene oxide is preferably 1-5 μm; the preferred pipe diameter of the multi-wall carbon nano-tube is 10-30 nm, and the preferred pipe length is 1-20 mu m; the mass ratio of the reduced graphene oxide to the multi-walled carbon nanotube is preferably 1:0.8 to 4, more preferably 1 to 2.
In the invention, the preparation method of the nano toughening rust inhibitor is preferably as follows: dipping a mixture of the reduced graphene oxide and the multi-walled carbon nano tube in a mixed solution of bis [3- (triethoxysilyl) propyl ] amine, and then sequentially washing and drying. In the present invention, the method for preparing the mixed solution of bis [3- (triethoxysilyl) propyl ] amine is preferably: mixing the components in a volume ratio of 1: 1-2 of ethanol and water to obtain an ethanol aqueous solution, adjusting the pH value of the ethanol aqueous solution to 4-5 by using an acetic acid solution, and then diluting bis [3- (triethoxysilyl) propyl ] amine by using the ethanol aqueous solution to obtain a mixed solution of bis [3- (triethoxysilyl) propyl ] amine; the volume percentage of the bis [3- (triethoxysilyl) propyl ] amine in the mixed solution of the bis [3- (triethoxysilyl) propyl ] amine is preferably 2-5%; the dipping temperature is preferably 60-65 ℃; the dipping time is preferably 10-30 min; the water for washing is preferably deionized water; preferably, the drying is carried out by firstly drying with hot air and then drying; the drying equipment is preferably an oven; the drying temperature is preferably 110 ℃, and the drying time is preferably 60min; in a particular embodiment of the invention, the Bis [3- (triethoxysilyl) propyl ] amine is preferably Bis- [ triethoxysilpropylpropyl ] amine, abbreviated BTSPA, from chemical Limited, beijing Warworthy.
Based on the mass portion of the hyperbranched aspartic polyurea resin, the core component comprises 0.1 to 1 portion of silane coupling agent, preferably 0.2 to 0.6 portion; the silane coupling agent is preferably vinyltris (. Beta. -methoxyethoxy) silane (A172).
Based on the mass parts of the hyperbranched aspartic polyurea resin, the core component comprises 5 to 10 parts of nano antibacterial agent, preferably 8 to 10 parts; the nano antibacterial agent is preferably obtained by modifying a compound of nano copper, nano zinc and nano silver through mussel protein; the particle sizes of the nano copper, the nano zinc and the nano silver are independent and preferably 50-300 nm; the mass ratio of the nano copper to the nano zinc to the nano silver in the compound of the nano copper to the nano zinc to the nano silver is preferably 20-40: 20 to 30:30 to 50 percent; the modification is preferably: soaking the compound of nano copper, nano zinc and nano silver in a mussel protein water solution and then drying; the concentration of the mussel protein water solution is preferably 0.01-0.1 mg/mL; the impregnation is preferably carried out under stirring conditions; the dipping temperature is preferably 50 ℃, and the time is preferably 1-24 h; preferably, the drying is carried out by natural air drying and then drying; the drying time is preferably 1-4 h, and the temperature is preferably 150 ℃; in a specific embodiment of the invention, the mussel protein is from biopolymer Products of Sweden AB, model eMAP.
Based on the mass portion of the hyperbranched aspartic polyurea resin, the core component comprises 0.2 to 0.5 portion of defoaming agent, preferably 0.2 to 0.4 portion; the antifoaming agent is preferably a BYK-1790 antifoaming agent.
The curing component comprises 40-100 parts by mass of isocyanate curing agent, preferably 70-80 parts by mass; the isocyanate curing agent is preferably one or two of Toluene Diisocyanate (TDI) and polymethylene polyphenyl polyisocyanate (PAPI); the toluene diisocyanate is preferably one or more of TDI-100, TDI-65 and TDI-35.
Based on the mass portion of the isocyanate curing agent, the curing component comprises 0-50 parts of organic solvent, preferably 10-20 parts; the organic solvent is preferably one or two of n-butyl acetate and propylene glycol methyl ether acetate.
In the present invention, the mass part basis of the core component and the curing component is 1.
The invention also provides a preparation method of the strong corrosion-resistant ultralow-temperature adhesive cement, which comprises the following steps:
carrying out first mixing on components contained in a core component to obtain the core component;
and carrying out second mixing on the components contained in the curing component to obtain the curing component.
In the invention, the first mixing is preferably to mix the hyperbranched aspartic polyurea resin, the catalyst and the organic solvent under the stirring condition, the rotating speed is preferably 1000-1500 rpm, then the silane coupling agent, the defoaming agent, the nano toughening rust inhibitor and the nano antibacterial agent are added, and the rotating speed is kept for continuously stirring for 10-15 min.
In the present invention, the second mixing is preferably mixing the isocyanate curing agent and the organic solvent under stirring; the stirring speed is 1000-1500 rpm, and the time is 10-30 min.
The invention also provides the application of the strong corrosion-resistant ultralow-temperature adhesive glue in the technical scheme on the surface of low-temperature equipment.
In the present invention, the application preferably comprises the steps of:
(1) Mixing the core component and the curing component to obtain bonding glue;
(2) And coating the bonding glue on the surface of low-temperature equipment for curing to obtain the strong corrosion-resistant ultralow-temperature protective layer.
The core component and the curing component are mixed to obtain the adhesive. In the present invention, the mass ratio of the core component to the curing component is preferably 1.5 to 2.0, more preferably 1.8 to 1.5, and further preferably 1 to 1.2; the invention has no special requirements on the mixing mode and can be mixed uniformly.
After the bonding glue is obtained, the bonding glue is coated on the surface of low-temperature equipment for curing, and the strong corrosion-resistant ultralow-temperature protective layer is obtained. In the present invention, the thickness of the coating is preferably 50 to 500. Mu.m, more preferably 100 to 300. Mu.m, and still more preferably 200 to 300. Mu.m; the temperature of the curing is preferably 25 ℃; the curing time is preferably 1 to 3 hours.
For further illustration of the present invention, the following examples are provided to describe the strong corrosion-resistant ultralow-temperature adhesive and the preparation method and application thereof in detail, but they should not be construed as limiting the scope of the present invention.
The hyperbranched aspartic polyurea resin used in the embodiment of the invention is from Shenzhen flying Jun research New Material Co., ltd, the terminal group of the hyperbranched aspartic polyurea resin comprises amino, and the density of the hyperbranched aspartic polyurea resin is 0.95-1.05 g/ml (20 ℃).
The nano toughening rust inhibitor used in the embodiment of the invention is obtained by modifying a mixture of RGO and MWCNTs with a modifier; the modifier is Bis [3- (triethoxysilyl) propyl ] amine, bis- [ triethoxysilpropylpropyl ] amine from chemical engineering Limited of Beijing Williaceae; the modification method comprises the following steps: soaking a mixture of RGO and MWCNTs in a mixed solution of bis [3- (triethoxysilyl) propyl ] amine, and then sequentially washing and drying; the preparation method of the mixed solution of the bis [3- (triethoxysilyl) propyl ] amine comprises the following steps of mixing the raw materials in a volume ratio of 1:1, mixing ethanol and water to obtain an ethanol aqueous solution, adjusting the ethanol aqueous solution to a pH value of 4 by using an acetic acid solution, and then diluting bis [3- (triethoxysilyl) propyl ] amine by using the ethanol aqueous solution with the pH value of 4 to obtain a mixed solution of bis [3- (triethoxysilyl) propyl ] amine; the volume percentage of the bis [3- (triethoxysilyl) propyl ] amine in the mixed solution of the bis [3- (triethoxysilyl) propyl ] amine is preferably 2%; the sheet diameter of the RGO is 1-5 mu m; the pipe diameter of the MWCNTs is 10-30 nm, the pipe length is 1-20 mu m, the dipping time is 30min, and the temperature is 60 ℃; the water for washing is deionized water; the drying is to firstly carry out hot air blow-drying and then carry out drying; the drying equipment is an oven; the drying temperature is 110 ℃, and the drying time is 60min; the mass ratio of RGO and MWCNTs in example 1 is preferably 1:3, the mass ratio of RGO to MWCNTs in example 2 is 3:2, the mass ratio of RGO and MWCNTs in example 3 is 5:4.
the nano antibacterial agent used in the embodiment of the invention is obtained by modifying a compound of nano copper, nano zinc and nano silver through mussel protein; the grain diameters of the nano copper, the nano zinc and the nano silver are independently 50-300 nm; the mussel protein is from biopolymer Products of Sweden technology company (Biopolymers Products of Sweden AB) and has the model of eMAP; the modification method comprises the following steps: soaking the compound of nano copper, nano zinc and nano silver in a mussel protein water solution and then drying; the concentration of the mussel protein water solution is 0.1mg/mL; the impregnation is carried out under stirring conditions; the dipping time is 12h, the dipping temperature is 50 ℃, and the drying is to carry out natural air drying firstly and then carry out drying at 150 ℃ for 1h; in the examples 1 to 3, the mass ratio of the nano copper, the nano zinc and the nano silver in the compound of the nano copper, the nano zinc and the nano silver is 30:20:50.
example 1
Adding 82 parts by mass of hyperbranched asparagus polyurea resin into a stirring tank, adding 0.02 part by mass of DY-12 and 8 parts by mass of n-butyl acetate under the stirring state at the rotating speed of 1000rpm, stirring for 30 minutes, dispersing uniformly, adding 0.3 part by mass of A172, 0.3 part by mass of BYK-1790, 4 parts by mass of nano toughening rust inhibitor and 6 parts by mass of nano antibacterial agent, and continuing stirring for 10 minutes to obtain a core component;
mixing 90 parts of toluene diisocyanate TDI-100 and 10 parts of n-butyl acetate under stirring conditions, wherein the stirring speed is 1000rpm, and the stirring time is 30 minutes to obtain a curing component.
Example 2
Adding 80 parts by mass of hyperbranched asparagus polyurea resin into a stirring tank, adding 0.02 part of DY-20 and 6 parts of propylene glycol methyl ether acetate under the stirring state at the rotating speed of 1000rpm, stirring for 30 minutes, dispersing uniformly, adding 0.2 part of A172, 0.2 part of BYK-1790, 5 parts of nano toughening rust inhibitor and 8 parts of nano antibacterial agent, and continuously stirring for 10 minutes to obtain a core component;
75 parts of toluene diisocyanate TDI-100 and 25 parts of n-butyl acetate are mixed under the condition of stirring, the rotating speed of stirring is 1000rpm, and the stirring time is 30 minutes, so that the curing component is obtained.
Example 3
Adding 55 parts by mass of hyperbranched aspartic polyurea resin into a stirring tank, adding 0.02 part of DY-20 and 30 parts of n-butyl acetate under the stirring state at the rotating speed of 1000rpm, stirring for 30 minutes, dispersing uniformly, adding 0.1 part of A172, 0.3 part of BYK-1790, 9 parts of nano toughening rust inhibitor and 6 parts of nano antibacterial agent, and continuing stirring for 10 minutes at the rotating speed of 1500rpm to obtain a core component;
mixing 60 parts of toluene diisocyanate TDI-100 and 40 parts of n-butyl acetate under stirring conditions, wherein the stirring speed is 1000rpm, and the stirring time is 30 minutes to obtain a curing component.
Comparative example 1
The core component and the curing component were prepared according to the method of example 1, except that the following conditions were used as in example 1: does not contain nano antibacterial agent.
Comparative example 2
The core component and the curing component were prepared according to the method of example 1, except that the following conditions were used as in example 1: does not contain a nano toughening rust inhibitor.
Comparative example 3
The core component and the curing component were prepared according to the method of example 1, except that the following conditions were used as in example 1:
(1) The hyperbranched aspartic polyurea resin is changed into the aspartic polyurea resin;
(2) Does not contain nano antibacterial agent;
(3) Does not contain a nano toughening rust inhibitor.
Application example 1
The core component and the curing component obtained in example 1 were mixed in a mass ratio of 1:1, obtaining an adhesive, coating the adhesive on the surface of a dry stainless steel 304 substrate without a rust layer, and curing, wherein the coating thickness is 200 mu m, the curing temperature is 25 ℃, and the curing time is 3h, so that the strong corrosion-resistant ultralow-temperature protective layer is obtained.
Application example 2
The method of application example 1 is referred to obtain the strong corrosion-resistant ultralow temperature protective layer, and other conditions are the same as those of application example 1, except that: the core component and the curing component in example 1 were changed to the core component and the curing component in example 2.
Application example 3
The method of the application example 1 is referred to obtain the strong corrosion-resistant ultralow-temperature protective layer, other conditions are the same as those of the application example 1, and the difference is as follows: the core component and curing component in example 1 were changed to those in example 3.
Comparative application example 1
The method of application example 1 is referred to obtain the strong corrosion-resistant ultralow temperature protective layer, and other conditions are the same as those of application example 1, except that: the core component and the curing component in example 1 were changed to those in comparative example 1.
Comparative application example 2
The method of application example 1 is referred to obtain the strong corrosion-resistant ultralow temperature protective layer, and other conditions are the same as those of application example 1, except that: the core component and the curing component in example 1 were changed to those in comparative example 2.
Comparative application example 3
The method of application example 1 is referred to obtain the strong corrosion-resistant ultralow temperature protective layer, and other conditions are the same as those of application example 1, except that: the core component and curing component in example 1 were changed to those in comparative example 3.
Performance test of strong corrosion-resistant ultralow-temperature protective layer
Detecting the adhesion strength of the strong corrosion-resistant ultralow-temperature protective layer (pull-open method) by referring to ISO4624-2002 standard; the tensile strength of the strong corrosion-resistant ultralow-temperature protective layer is detected according to the GB/T16777-2008 standard, and the salt spray resistance (water resistance/corrosion resistance) of the strong corrosion-resistant ultralow-temperature protective layer is tested according to the GB/T771-2007 standard; testing the antibacterial property of the strong corrosion-resistant ultralow-temperature protective layer by adopting an escherichia coli culture antibacterial ring method; a third party is entrusted with 50 times of temperature control under the repeated action of-196 ℃ and 50 ℃, the strong corrosion-resistant ultralow temperature protective layer is not cracked and falls off, and the temperature change resistance of the protective layer is examined. The results of various performance indexes of the strong corrosion-resistant ultralow temperature protective layer obtained in application examples 1 to 3 and application comparative examples 1 to 3 are shown in table 1.
Table 1 various performance indexes of the strong corrosion-resistant ultra-low temperature protective layer obtained in application examples 1 to 3 and application comparative examples 1 to 3
From table 1, the strong corrosion-resistant ultralow-temperature protective layers obtained in application examples 1 to 3 all show excellent adhesive force, tensile strength and temperature change resistance, and have excellent waterproof and corrosion-resistant properties, so that the strong corrosion-resistant ultralow-temperature adhesive prepared by the invention can adapt to complex marine service environments and ultralow-temperature environments, not only has strong ultralow adhesive capacity and excellent comprehensive mechanical properties, but also has excellent corrosion-resistant properties, and can maintain ultralow-temperature adhesive performance and corrosion-resistant properties for a long time; according to the test results of the application example 1 and the application comparative example 1, the nano antibacterial agent enables the adhesive to have good antibacterial and bacteriostatic properties, and meanwhile, the mechanical property of the protective layer obtained after the adhesive is cured can be optimized; according to the test results of the application example 1 and the application comparative example 2, the appropriate amount of the nano toughening rust inhibitor is added, so that the toughness and the strength of the adhesive can be obviously improved, the permeability resistance of a polymer film layer is enhanced, the corrosion resistance of the low-temperature adhesive is improved, the elasticity and the elongation of the adhesive can be improved, and the ultralow-temperature performance and the high-low temperature impact resistance of the adhesive are enhanced; according to the test results of the application example 1 and the application comparative examples 2 to 3, the prepared strong corrosion-resistant ultralow-temperature adhesive has strong adhesive force to a metal base material and excellent temperature change resistance and ultralow temperature resistance under the synergistic action of the hyperbranched aspartic polyurea resin and the nano toughening rust inhibitor.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention in any way. It should be noted that modifications and adaptations can be made by those skilled in the art without departing from the principle of the present invention, and should be considered as within the scope of the present invention.
Claims (10)
1. The utility model provides a strong corrosion-resistant ultra-low temperature bonding glue which characterized in that, includes the core component and the solidification component of independent partial shipment:
the core component comprises the following components in parts by mass:
50-90 parts of hyperbranched aspartic polyurea resin;
6-40 parts of an organic solvent;
0.01-0.1 part of catalyst;
0.8-10 parts of nano toughening rust inhibitor;
0.1-1 part of silane coupling agent;
5-10 parts of a nano antibacterial agent;
0.2-0.5 part of defoaming agent;
the curing component comprises the following components in parts by mass:
40-100 parts of isocyanate curing agent;
0-50 parts of organic solvent.
2. The super-corrosion-resistant ultralow-temperature adhesive according to claim 1, wherein the terminal groups of the hyperbranched aspartic polyurea resin comprise amino groups, and the density of the hyperbranched aspartic polyurea resin is 0.95-1.05 g/mL.
3. The super corrosion-resistant ultralow-temperature bonding adhesive as claimed in claim 1 or 2, wherein the organic solvent in the core component and the organic solvent in the curing component are independently one or two of n-butyl acetate and propylene glycol methyl ether acetate; the catalyst is one or two of organic tin or organic bismuth.
4. The super-low temperature adhesive according to claim 1, wherein the nano toughening rust inhibitor is obtained by modifying a mixture of reduced graphene oxide and multi-walled carbon nanotubes with a modifier; the modifier is bis [3- (triethoxysilyl) propyl ] amine; the sheet diameter of the reduced graphene oxide is 1-5 mu m; the pipe diameter of the multi-wall carbon nano-tube is 10-30 nm, and the pipe length is 1-20 mu m.
5. The super corrosion-resistant ultralow-temperature bonding adhesive as claimed in claim 1, wherein the silane coupling agent is vinyl tris (β -methoxyethoxy) silane; the nano antibacterial agent is obtained by modifying a compound of nano copper, nano zinc and nano silver by mussel protein; the grain diameters of the nano copper, the nano zinc and the nano silver are independently 50-300 nm.
6. The strong corrosion-resistant ultralow-temperature adhesive according to claim 1, wherein the defoaming agent is a BYK-1790 defoaming agent; the isocyanate curing agent is one or two of toluene diisocyanate and polymethylene polyphenyl polyisocyanate.
7. The preparation method of the strong corrosion-resistant ultralow-temperature adhesive cement as claimed in any one of claims 1 to 6, is characterized by comprising the following steps:
carrying out first mixing on components contained in a core component to obtain the core component;
and carrying out second mixing on the components contained in the curing component to obtain the curing component.
8. The use of the strong corrosion-resistant ultralow-temperature adhesive glue according to any one of claims 1 to 6 or the strong corrosion-resistant ultralow-temperature adhesive glue prepared by the preparation method according to claim 7 on the surface of low-temperature equipment.
9. The application of claim 8, wherein the application method comprises:
(1) Mixing the core component and the curing component to obtain bonding glue;
(2) And coating the bonding glue on the surface of low-temperature equipment for curing to obtain the strong corrosion-resistant ultralow-temperature protective layer.
10. Use according to claim 8 or 9, wherein the mass ratio of the core component to the curing component is 1; the thickness of the coating is 50-500 mu m; the curing temperature is normal temperature.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104559899A (en) * | 2014-12-24 | 2015-04-29 | 深圳市嘉达高科产业发展有限公司 | Polyaspartate polyurea adhesive and preparation method thereof |
| CN114032018A (en) * | 2021-11-26 | 2022-02-11 | 厦门昕钢防腐工程科技有限公司 | Inert metal corrosion-resistant coating and preparation method and application method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104559899A (en) * | 2014-12-24 | 2015-04-29 | 深圳市嘉达高科产业发展有限公司 | Polyaspartate polyurea adhesive and preparation method thereof |
| CN114032018A (en) * | 2021-11-26 | 2022-02-11 | 厦门昕钢防腐工程科技有限公司 | Inert metal corrosion-resistant coating and preparation method and application method thereof |
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