CN115785879B - Flame-retardant high-temperature-resistant double-component polyurethane structural adhesive - Google Patents
Flame-retardant high-temperature-resistant double-component polyurethane structural adhesive Download PDFInfo
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Abstract
The invention belongs to the technical field of polyurethane adhesives, and in particular relates to a flame-retardant high-temperature-resistant double-component polyurethane structural adhesive, which comprises the following components in volume ratio of 1:1 and a polyurethane prepolymer component; the polymer component comprises the following raw materials in parts by weight: 11-22 parts of micromolecular polyol, 0-23 parts of polyfunctional polyether polyol, 60-78 parts of bulk flame-retardant modified bio-based polyol, 0.02-0.22 part of catalyst, 42-50 parts of inorganic filler, 4-12 parts of 3A molecular sieve water absorbent and 3-6 parts of hydrophobic gas-phase white carbon black; the polyurethane prepolymer component comprises the following raw materials in parts by weight: 100 parts of MDI-type isocyanate, 1-3 parts of a water scavenger, 2-6 parts of a coupling agent, 48-52 parts of an inorganic filler and 2-6 parts of hydrophobic fumed silica. The V-0 flame retardant polyurethane structural adhesive has the advantages of high-temperature shear strength and low specific gravity while realizing V-0 flame retardant, and achieves the balance among main indexes of the polyurethane structural adhesive.
Description
Technical Field
The invention belongs to the technical field of polyurethane adhesives, and particularly relates to a flame-retardant high-temperature-resistant double-component polyurethane structural adhesive.
Background
The structural adhesive product for the power battery of the new energy automobile mainly plays roles of bonding, sealing and fixing in battery packaging, and currently, polyurethane products are mainly used. The conventional polyurethane structural adhesive product has the defects of high specific gravity, poor toughness, poor high temperature resistance and the like due to the limitation of application environment, safety coefficient and packaging process requirements. With the high-speed development of new energy automobiles, the requirements on the flame retardant grade, the environmental protection property, the heat conductivity, the mechanical strength, the specific gravity, the salt fog resistance, the high temperature resistance level, the cost, the use and operation process and the like of the polyurethane structural adhesive of the power battery are increasingly increased at the present stage.
In order to meet the flame-retardant requirement, a large amount of liquid flame retardant such as toluene diphenyl phosphate (CDP), triethyl phosphate (TEP), tricresyl phosphate (TCP) and the like or solid flame retardants such as phosphorus nitrogen or aluminum hypophosphite are added into a product formula system, and the addition of the added flame retardant can greatly reduce the mechanical strength, particularly the high-temperature shear strength, of the product, occupy the addition space of the heat-conducting filler and reduce the hydrolysis resistance of the product.
Because the structural adhesive product has more performance indexes, when a formula system is designed, the performance indexes are difficult to reach higher level at the same time, and the mutual influence and mutual pressing conditions exist, such as the reduction of specific gravity, obvious reduction of shear strength after the flame retardance of the product is improved, the increase of brittleness of the product after the mechanical strength is improved, and the like.
Disclosure of Invention
The technical problem to be solved by the invention is to provide the flame-retardant high-temperature-resistant double-component polyurethane structural adhesive, which realizes V-0 flame retardance, has higher high-temperature shear strength and smaller specific gravity, and achieves the balance among main indexes of the polyurethane structural adhesive.
The invention relates to a flame-retardant high-temperature-resistant double-component polyurethane structural adhesive, which comprises the following components in percentage by volume: 1 and a polyurethane prepolymer component;
the polymer component comprises the following raw materials in parts by weight:
small molecule polyalcohol 11-22
0-23% of polyfunctional polyether polyol
60-78 parts of bulk flame-retardant modified bio-based polyol
0.02 to 0.22 of catalyst
Inorganic filler 42-52
4-12 parts of 3A molecular sieve water absorbing agent
3-6 parts of hydrophobic fumed silica;
the polyurethane prepolymer component comprises the following raw materials in parts by weight:
MDI isocyanate 100
1-3 parts of water scavenger
2-6 parts of coupling agent
48-52 of inorganic filler
2-6 parts of hydrophobic fumed silica.
The bulk flame-retardant modified bio-based polyol is prepared through an esterification stage and a polycondensation stage, and the preparation method comprises the following steps:
(1) Esterification stage
The molar ratio was set to 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid (CEPPA) and Ethylene Glycol (EG) into a reaction kettle, introducing nitrogen, setting the temperature to 170-190 ℃, and pre-esterifying for 2-4 hours to obtain esterified liquid CEPPA-EG;
(2) Polycondensation stage
Refining vegetable oil, phthalic anhydride, ethylene glycol or propylene glycol and esterified liquid CEPPA-EG according to the mass ratio of (20-50): (14-29.2): (5-12.2): (31-42.8) adding tetrabutyl titanate serving as a catalyst and TPP serving as a stabilizer into a reaction kettle, starting stirring, starting water discharge when the temperature is raised to 135-140 ℃, controlling the condensation reflux temperature to 100-110 ℃, then raising the temperature to 220-235 ℃ in a gradual heating mode, vacuumizing until the hydroxyl value is 180-230 mgKOH/g and the moisture content is less than or equal to 0.05%, and then cooling to obtain the catalyst; the catalyst is added in an amount of 40-80 ppm and the stabilizer is added in an amount of 40-80 ppm based on the total mass of materials put into the reaction kettle in the step (2).
The refined vegetable oil is one of refined castor oil, refined soybean oil and refined corn oil.
The small molecular polyalcohol is one or more of methyl propylene glycol (MPO), 1, 2-propylene glycol (DPG) and 1, 4-Butanediol (BDO); the polyfunctional polyether polyol is one or more of INOVOL R403, INOVOL C305, INOVOL C304 of New material limited of Navigator, shandong, and NJ6209 of Ningwu chemical plant of sentence city.
The catalyst is triethylene diamine and dipropylene glycol in a mass ratio of 1:2, dibutyl tin dilaurate, bismuth isooctanoate, and CUCAT-E02, guangzhou eurun synthetic materials, inc.
The inorganic filler is one or more of aluminum hydroxide, magnesium hydroxide and JAZ-020 and JAZ-058 of Guangdong Jin Ge new material Co., ltd.
The hydrophobic fumed silica is one or more of AEROSIL R202, AEROSIL R972, WACKE H15, WACKE H20, and CH-18 of Asahi Kabushiki Kaisha of Shanghai, germany.
The MDI-type isocyanate is prepared from MDI-100 and PM200 in a mass ratio of (0-1): 1.
The coupling agent is one or more of KH-550, KH-560 and KH-570; the water scavenger is one or more OF water scavenger TI, water scavenger OF, water scavenger PTSI and water scavenger BF-5.
And uniformly mixing the raw materials of the polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to the volume ratio of 1:1 to obtain the flame-retardant high-temperature-resistant double-component polyurethane structural adhesive.
Compared with the prior art, the invention has the beneficial effects that:
1. the preparation of polyurethane structural adhesive by adopting the bulk flame-retardant modified bio-based polyol can replace the introduction of an additive flame retardant in the conventional technical means, so that the reduction of shear strength and thermal conductivity caused by the addition of the flame retardant is avoided;
2. the vegetable oil is modified to introduce a benzene ring structure, so that the rigidity of a structural adhesive product is stronger, the high temperature resistance is improved, the highest shear strength test result at 60 ℃ can reach 8.0MPa, and the polyurethane structural adhesive can have more excellent performance under the high temperature weather condition in the application of a new energy automobile power battery;
3. the specific gravity is smaller, and the light-weight requirement of the new energy battery is met.
Detailed Description
The technical scheme of the present invention will be clearly and completely described in the following examples.
All materials used in the examples are commercially available, except as specified.
Example 1
The flame-retardant high-temperature-resistant bi-component polyurethane structural adhesive comprises a polymer component and a polyurethane prepolymer component in a volume ratio of 1:1;
the polymer component comprises the following raw materials in parts by weight:
MPO：12
INOVOL C304：18
bulk flame retardant modified bio-based polyol: 70
Dibutyl tin dilaurate: 0.05
JAZ-058：50
3A molecular sieve water absorbing agent: 4
AEROSIL R202：3；
The polyurethane prepolymer component comprises the following raw materials in parts by weight:
PM200：100
water scavenger PTSI:3
KH-560：2
JAZ-058：52
AEROSIL R202：3；
Uniformly mixing the raw materials of the polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to the volume ratio of 1:1 to obtain the flame-retardant high-temperature-resistant double-component polyurethane structural adhesive;
the preparation method of the bulk flame-retardant modified bio-based polyol comprises the following steps:
(1) Esterification stage
The molar ratio was set to 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol into a reaction kettle, introducing nitrogen, setting the temperature to 170 ℃, and pre-esterifying for 4 hours to obtain esterified liquid CEPPA-EG;
(2) Polycondensation stage
Refined castor oil, phthalic anhydride, glycol and esterified liquid CEPPA-EG are mixed according to the mass ratio of 50:14:5:31 adding the catalyst tetrabutyl titanate and the stabilizer TPP into a reaction kettle, starting stirring, starting water discharge when the temperature is raised to 136 ℃, controlling the condensation reflux temperature to be 105 ℃, then raising the temperature to 225 ℃ in a gradual heating mode, vacuumizing until the hydroxyl value is 230mgKOH/g and the moisture content is less than or equal to 0.05%, and then cooling to obtain the catalyst; wherein, the adding amount of the catalyst is 40ppm and the adding amount of the stabilizer is 40ppm based on the total mass of the materials put into the reaction kettle in the step (2).
Example 2
The flame-retardant high-temperature-resistant bi-component polyurethane structural adhesive comprises a polymer component and a polyurethane prepolymer component in a volume ratio of 1:1;
the polymer component comprises the following raw materials in parts by weight:
MPO：14
INOVOL R403：10
bulk flame retardant modified bio-based polyol: 76
Bismuth isooctanoate: 0.04
JAZ-058：50
3A molecular sieve water absorbing agent: 8
WACKER H15：4；
The polyurethane prepolymer component comprises the following raw materials in parts by weight:
PM200：80
MDI-100：20
water scavenger OF-01:2
KH-550：4
Aluminum hydroxide: 50
WACKER H15：4；
Uniformly mixing the raw materials of the polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to the volume ratio of 1:1 to obtain the flame-retardant high-temperature-resistant double-component polyurethane structural adhesive;
the preparation method of the bulk flame-retardant modified bio-based polyol comprises the following steps:
(1) Esterification stage
The molar ratio was set to 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol into a reaction kettle, introducing nitrogen, setting the temperature to 180 ℃, and pre-esterifying for 3 hours to obtain esterified liquid CEPPA-EG;
(2) Polycondensation stage
Refined corn oil, phthalic anhydride, propylene glycol and esterified liquid CEPPA-EG are mixed according to the mass ratio of 31:21.7:5.5:42.8 adding tetrabutyl titanate serving as a catalyst and TPP serving as a stabilizer into a reaction kettle, starting stirring, starting water discharge when the temperature is raised to 138 ℃, controlling the condensation reflux temperature to be 108 ℃, then raising the temperature to 230 ℃ in a gradual heating mode, vacuumizing until the hydroxyl value is 200mgKOH/g and the moisture content is less than or equal to 0.05%, and then cooling to obtain the catalyst; wherein, the adding amount of the catalyst is 60ppm and the adding amount of the stabilizer is 60ppm based on the total mass of the materials put into the reaction kettle in the step (2).
Example 3
The flame-retardant high-temperature-resistant bi-component polyurethane structural adhesive comprises a polymer component and a polyurethane prepolymer component in a volume ratio of 1:1;
the polymer component comprises the following raw materials in parts by weight:
DPG：11
INOVOL C305：10
INOVOL C304：15
bulk flame retardant modified bio-based polyol: 64
A mixture of triethylene diamine and dipropylene glycol in a mass ratio of 1:2: 0.05
JAZ-020：48
3A molecular sieve water absorbing agent: 6
WACKER H20：3；
The polyurethane prepolymer component comprises the following raw materials in parts by weight:
PM200：60
MDI-100：40
and a water scavenger BF-5:2
KH-560：6
JAZ-020：48
WACKER H20：3；
Uniformly mixing the raw materials of the polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to the volume ratio of 1:1 to obtain the flame-retardant high-temperature-resistant double-component polyurethane structural adhesive;
the preparation method of the bulk flame-retardant modified bio-based polyol comprises the following steps:
(1) Esterification stage
The molar ratio was set to 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol into a reaction kettle, introducing nitrogen, setting the temperature to 180 ℃, and pre-esterifying for 3 hours to obtain esterified liquid CEPPA-EG;
(2) Polycondensation stage
Refined soybean oil, phthalic anhydride, ethylene glycol and esterified liquid CEPPA-EG are mixed according to the mass ratio of 30:23.2:8.3:38.5 adding tetrabutyl titanate serving as a catalyst and TPP serving as a stabilizer into a reaction kettle, starting stirring, starting water discharge when the temperature is raised to 135 ℃, controlling the condensation reflux temperature to 100 ℃, then raising the temperature to 221 ℃ in a gradual heating mode, vacuumizing until the hydroxyl value is 230mgKOH/g and the moisture content is less than or equal to 0.05%, and then cooling to obtain the catalyst; wherein, the adding amount of the catalyst is 80ppm and the adding amount of the stabilizer is 80ppm based on the total mass of the materials put into the reaction kettle in the step (2).
Example 4
The flame-retardant high-temperature-resistant bi-component polyurethane structural adhesive comprises a polymer component and a polyurethane prepolymer component in a volume ratio of 1:1;
the polymer component comprises the following raw materials in parts by weight:
BDO：17
NJ6209：23
bulk flame retardant modified bio-based polyol: 60
Catalyst CUCAT-E02:0.2
Bismuth isooctanoate: 0.02
Magnesium hydroxide: 50
3A molecular sieve water absorbing agent: 4
CH-18：4；
The polyurethane prepolymer component comprises the following raw materials in parts by weight:
PM200：60
MDI-100：40
and a water scavenger BF-5:2
KH-570：4
Magnesium hydroxide: 50
CH-18：4；
Uniformly mixing the raw materials of the polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to the volume ratio of 1:1 to obtain the flame-retardant high-temperature-resistant double-component polyurethane structural adhesive;
the preparation method of the bulk flame-retardant modified bio-based polyol comprises the following steps:
(1) Esterification stage
The molar ratio was set to 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol into a reaction kettle, introducing nitrogen, setting the temperature to 180 ℃, and pre-esterifying for 3 hours to obtain esterified liquid CEPPA-EG;
(2) Polycondensation stage
Refined soybean oil, phthalic anhydride, propylene glycol and esterified liquid CEPPA-EG are mixed according to the mass ratio of 20:29.2:12.2:38.6 adding tetrabutyl titanate serving as a catalyst and TPP serving as a stabilizer into a reaction kettle, starting stirring, starting water outlet when the temperature is increased to 140 ℃, controlling the condensation reflux temperature to be 110 ℃, then increasing the temperature to 235 ℃ in a gradual heating mode, vacuumizing until the hydroxyl value is 180mgKOH/g and the moisture content is less than or equal to 0.05%, and then cooling to obtain the catalyst; wherein, the adding amount of the catalyst is 50ppm and the adding amount of the stabilizer is 70ppm based on the total mass of the materials put into the reaction kettle in the step (2).
Example 5
The flame-retardant high-temperature-resistant bi-component polyurethane structural adhesive comprises a polymer component and a polyurethane prepolymer component in a volume ratio of 1:1;
the polymer component comprises the following raw materials in parts by weight:
BDO：22
bulk flame retardant modified bio-based polyol: 78
Dibutyl tin dilaurate: 0.02
Aluminum hydroxide: 42
3A molecular sieve water absorbing agent: 12
AEROSIL R 972：6；
The polyurethane prepolymer component comprises the following raw materials in parts by weight:
PM200：50
MDI-100：50
water scavenger TI:1
KH-560：4
Aluminum hydroxide: 50
AEROSIL R972：6；
Uniformly mixing the raw materials of the polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to the volume ratio of 1:1 to obtain the flame-retardant high-temperature-resistant double-component polyurethane structural adhesive;
the preparation method of the bulk flame-retardant modified bio-based polyol comprises the following steps:
(1) Esterification stage
The molar ratio was set to 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol into a reaction kettle, introducing nitrogen, setting the temperature to 180 ℃, and pre-esterifying for 3 hours to obtain esterified liquid CEPPA-EG;
(2) Polycondensation stage
Refined castor oil, phthalic anhydride, ethylene glycol and esterified liquid CEPPA-EG are mixed according to the mass ratio of 30:22.3:5.6:42.1 adding tetrabutyl titanate serving as a catalyst and TPP serving as a stabilizer into a reaction kettle, starting stirring, starting water discharge when the temperature is raised to 139 ℃, controlling the condensation reflux temperature to be 107 ℃, then raising the temperature to 232 ℃ in a gradual heating mode, vacuumizing until the hydroxyl value is 180mgKOH/g and the moisture content is less than or equal to 0.05%, and then cooling to obtain the catalyst; wherein, the adding amount of the catalyst is 60ppm and the adding amount of the stabilizer is 60ppm based on the total mass of the materials put into the reaction kettle in the step (2).
Comparative example 1
This comparative example 1 differs from example 2 in that the same was conducted as in example 2 except that the inorganic filler in the polymer component and the polyurethane prepolymer component was replaced with kaolin of the same weight.
Comparative example 2
This comparative example 2 differs from example 5 in that MDI-100 was replaced with MDI-50 of equal weight, all of which were identical to example 5.
Comparative example 3
This comparative example 3 is different from example 4 in that the weight part of magnesium hydroxide in the polymer component and the polyurethane prepolymer component is 54, and is the same as example 4.
Comparative example 4
This comparative example 4 differs from example 1 in that the same as example 1 was repeated except that 18 parts of inomol C304 and 70 parts of the bulk flame retardant modified bio-based polyol were replaced with 34 parts of inomol C304 and 54 parts of castor oil polyol.
Comparative example 5
The two-component polyurethane structural adhesive of the comparative example 5 comprises a polymer component and a polyurethane prepolymer component in a volume ratio of 1:1;
the polymer component comprises the following raw materials in parts by weight:
MPO：12
INOVOL C304：7
bulk flame retardant modified bio-based polyol: 66
CDP：15
Dibutyl tin dilaurate: 0.05
JAZ-058：50
Water absorbing agent: 4
AEROSIL R202：3；
The polyurethane prepolymer component comprises the following raw materials in parts by weight:
PM200：85
CDP：15
water scavenger PTSI:3
KH-560：2
JAZ-058：52
AEROSIL R202：3；
Uniformly mixing the raw materials of the polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to the volume ratio of 1:1 to obtain the bi-component polyurethane structural adhesive; wherein the bulk flame retardant modified bio-based polyol is the same as example 1.
Performance test:
the two-component polyurethane structural adhesives obtained in examples 1 to 5 and comparative examples 1 to 5 were subjected to performance test according to the following standard or method, and the results are shown in Table 1.
Density: GB/T4472-2011 "determination of chemical Density and relative Density";
hardness: GB/T531.1-2008 first part of the method for testing the indentation hardness of vulcanized rubber or thermoplastic rubber: shore durometer method;
shear strength at 60 ℃): according to the test sample of the sandwich structure manufactured by 6061 Al-polyurethane structural adhesive-PET film-polyurethane structural adhesive-6061 Al, the thickness of the adhesive layer is 0.2mm, the bonding area is 25mm multiplied by 12.5mm, and the test is carried out by referring to GB/T7124-2008 standard of adhesive tensile shear strength determination (rigid material to rigid material), and the tensile speed is 100mm/min;
flame retardant: UL94 vertical burn test method.
Table 1 polyurethane structural adhesive property test tables of examples 1 to 5 and comparative examples 1 to 5
As can be seen from the data in Table 1, the polyurethane structural adhesive of the present inventionThe flame retardant rating can reach UL 94V-0 level, and the specific gravity is less than or equal to 1.40 g.cm -3 And after the material is placed for 7 days at room temperature, the highest shearing strength at 60 ℃ can reach 8.0MPa, and various indexes are excellent. As is clear from comparative examples 2 and 1, the specific gravity was reduced by replacing the inorganic filler with kaolin, but since kaolin could not absorb heat to explain water release at the time of combustion like metal hydroxide, the flame retardant rating was significantly reduced. In comparative examples 5 and 2, after MDI-100 was replaced with MDI-50, the hardness and high temperature resistance of the product were remarkably reduced due to the reduced crystallinity of isocyanate. In comparative examples 1 and 4, after the vegetable-based polyol was replaced with the unmodified castor oil polyol, although the inorganic filler was a metal hydroxide, the addition amount was limited to a small amount, the flame retardant rating was not satisfactory, and the high-temperature shear strength was low due to the poor rigidity of the unmodified polyol. In comparative example 5, after about 10% by mass of the liquid flame retardant CDP was introduced into the product system, the flame retardant was present in the product system in a free form, and the heat stability was poor and the hard segment content of the product was reduced, resulting in a significant decrease in the hardness and high temperature shear strength of the product. In comparative examples 4 and 3, the high-temperature shear strength was increased by increasing the amount of the system metal hydroxide filler, but the specific gravity was also increased and the operability was lowered, failing to meet the demand for light weight of the new energy battery at the present stage.
Claims (6)
1. The flame-retardant high-temperature-resistant double-component polyurethane structural adhesive is characterized by comprising the following components in volume ratio of 1:1 and a polyurethane prepolymer component;
the polymer component comprises the following raw materials in parts by weight:
small molecule polyalcohol 11-22
0-23% of polyfunctional polyether polyol
60-78 parts of bulk flame-retardant modified bio-based polyol
0.02 to 0.22 of catalyst
42-50% of inorganic filler
4-12 parts of 3A molecular sieve water absorbing agent
3-6 parts of hydrophobic fumed silica;
the polyurethane prepolymer component comprises the following raw materials in parts by weight:
MDI isocyanate 100
1-3 parts of water scavenger
2-6 parts of coupling agent
48-52 of inorganic filler
2-6 parts of hydrophobic fumed silica;
the inorganic filler is one or more of aluminum hydroxide, magnesium hydroxide, JAZ-020 and JAZ-058;
the MDI-type isocyanate is prepared from MDI-100 and PM200 in a mass ratio of (0-1): 1, a mixture of two or more of the above-mentioned materials;
the bulk flame-retardant modified bio-based polyol is prepared through an esterification stage and a polycondensation stage, and the preparation method comprises the following steps:
(1) Esterification stage
The molar ratio was set to 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol into a reaction kettle, introducing nitrogen, setting the temperature to 170-190 ℃, and pre-esterifying for 2-4 hours to obtain an esterified liquid CEPPA-EG;
(2) Polycondensation stage
Refining vegetable oil, phthalic anhydride, ethylene glycol or propylene glycol and esterified liquid CEPPA-EG according to the mass ratio of (20-50): (14-29.2): (5-12.2): (31-42.8) adding tetrabutyl titanate serving as a catalyst and TPP serving as a stabilizer into a reaction kettle, starting stirring, starting water discharge when the temperature is raised to 135-140 ℃, controlling the condensation reflux temperature to be 100-110 ℃, then raising the temperature to 220-235 ℃, vacuumizing until the hydroxyl value is 180-230 mgKOH/g and the moisture content is less than or equal to 0.05%, and then cooling to obtain the catalyst; the catalyst is added in an amount of 40-80 ppm and the stabilizer is added in an amount of 40-80 ppm based on the total mass of materials put into the reaction kettle in the step (2).
2. The flame retardant, high temperature resistant, two component polyurethane construction adhesive of claim 1 wherein the refined vegetable oil is one of refined castor oil, refined soybean oil, and refined corn oil.
3. The flame-retardant and high-temperature-resistant two-component polyurethane structural adhesive according to claim 1, wherein the small-molecule polyol is one or more of methyl propylene glycol, 1, 2-propylene glycol and 1, 4-butanediol; the polyfunctional polyether polyol is one or more of inonol R403, inonol C305, inonol C304, and NJ 6209.
4. The flame-retardant and high-temperature-resistant two-component polyurethane structural adhesive according to claim 1, wherein the catalyst is triethylene diamine and dipropylene glycol in a mass ratio of 1:2, dibutyl tin dilaurate, bismuth isooctanoate, and CUCAT-E02.
5. The flame-retardant and high-temperature-resistant two-component polyurethane structural adhesive according to claim 1, wherein the hydrophobic fumed silica is one or more of AEROSIL R202, AEROSIL R972, WACKER H15, WACKER H20 and CH-18.
6. The flame-retardant and high-temperature-resistant two-component polyurethane structural adhesive according to claim 1, wherein the coupling agent is one or more of KH-550, KH-560 and KH-570; the water scavenger is one or more OF water scavenger TI, water scavenger OF, water scavenger PTSI and water scavenger BF-5.
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| CN111848904A (en) * | 2020-06-03 | 2020-10-30 | 山东一诺威聚氨酯股份有限公司 | Heat-conducting halogen-free flame-retardant polyurethane elastomer and preparation method thereof |
| CN112608707B (en) * | 2020-12-15 | 2022-12-13 | 广东普赛达密封粘胶有限公司 | Double-component polyurethane structural adhesive and preparation method thereof |
| CN112708127A (en) * | 2020-12-28 | 2021-04-27 | 山东一诺威新材料有限公司 | Phosphorus-containing flame-retardant polyether polyol and preparation method thereof |
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