CN115785879A - 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 particularly relates to a flame-retardant high-temperature-resistant double-component polyurethane structural adhesive, which comprises the following components in percentage by volume of 1:1 and a polyurethane prepolymer component; the polymer component comprises the following raw materials in parts by weight: 11-22 parts of small molecular 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 absorber and 3-6 parts of hydrophobic fumed silica; the polyurethane prepolymer component comprises the following raw materials in parts by weight: 100 parts of MDI type isocyanate, 1 to 3 parts of water scavenger, 2 to 6 parts of coupling agent, 48 to 52 parts of inorganic filler and 2 to 6 parts of hydrophobic fumed silica. The invention realizes V-0 grade flame retardance, has higher high-temperature shear strength and smaller specific gravity, 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 bi-component polyurethane structural adhesive.
Background
The structural adhesive product for the new energy automobile power battery mainly plays roles in bonding, sealing and fixing in battery packaging, and currently mainly takes a polyurethane product. 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 factor 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 increased day by day at the present stage.
In order to meet the flame retardant requirement, a large amount of liquid flame retardants such as diphenyl cresyl phosphate (CDP), triethyl phosphate (TEP), tricresyl phosphate (TCP) and the like or solid flame retardants such as phosphorus nitrogen series or aluminum hypophosphite are added into a product formula system, and the addition of the additive flame retardants can greatly reduce the mechanical strength, particularly the high-temperature shear strength, of the product, and occupy the addition space of the heat-conducting filler, and in addition, the hydrolysis resistance of the product can be reduced.
Because the performance indexes of the structural adhesive are more, when a formula system is designed, all performance indexes are difficult to reach higher levels at the same time, and the mutual pressing conditions are influenced, such as the reduction of specific gravity, the obvious reduction of the shear strength after the flame retardance of the product is increased, the brittleness of the product after the mechanical strength is increased, and the like.
Disclosure of Invention
The invention aims to solve the technical problem of providing a flame-retardant high-temperature-resistant bi-component polyurethane structural adhesive, which realizes V-0-level flame retardance, has high-temperature shear strength and small specific gravity, and achieves the balance among main indexes of the polyurethane structural adhesive.
The flame-retardant high-temperature-resistant bi-component polyurethane structural adhesive comprises the following components in percentage by volume of 1:1 and a polyurethane prepolymer component;
the polymer component comprises the following raw materials in parts by weight:
small-molecular polyol 11 to 22
0 to 23 parts by weight of polyfunctional polyether polyol
60-78 parts of body flame-retardant modified bio-based polyol
Catalyst 0.02 to 0.22
Inorganic fillers 42 to 52
4-12 parts of 3A molecular sieve water absorbent
3 to 6 portions of hydrophobic fumed silica;
the polyurethane prepolymer component comprises the following raw materials in parts by weight:
MDI type isocyanate 100
Water scavenger 1 to 3
Coupling agents 2 to 6
Inorganic fillers 48 to 52
2 to 6 portions 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
Mixing the components in a molar ratio of 1.0:3.45 of 2-carboxyethylphenylphosphinic acid (CEPPA) and Ethylene Glycol (EG) are added into a reaction kettle, nitrogen is introduced, the temperature is set to be 170 to 190 ℃, and after pre-esterification reaction is carried out for 2 to 4 hours, esterified liquid CEPPA-EG is obtained;
(2) Polycondensation stage
Refining vegetable oil, phthalic anhydride, ethylene glycol or propylene glycol and esterified liquid CEPPA-EG are mixed according to the mass ratio of (20 to 50): (14 to 29.2): (5 to 12.2): (31 to 42.8) adding the mixture into a reaction kettle, adding a catalyst tetrabutyl titanate and a stabilizer TPP, starting stirring, discharging water when the temperature rises to 135 to 140 ℃, controlling the condensation reflux temperature to be 100 to 110 ℃, then increasing the temperature to be 220 to 235 ℃ in a gradual temperature rise mode, vacuumizing until the hydroxyl value is 180 to 230mgKOH/g and the water content is less than or equal to 0.05%, and then cooling to obtain the catalyst; wherein the adding amount of the catalyst is 40 to 80ppm and the adding amount of the stabilizer is 40 to 80ppm 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 polyol is one or more of methyl propylene glycol (MPO), 1, 2-propylene glycol (DPG) and 1, 4-Butanediol (BDO); the multifunctional polyether polyol is one or more of INOVOL R403, INOVOL C305, INOVOL C304 from Shandong-Noway New Material Co., ltd, and NJ6209 from Ningwu chemical plant of Tankou city.
The catalyst is triethylene diamine and dipropylene glycol in a mass ratio of 1:2, dibutyltin dilaurate, bismuth isooctanoate and CUCAT-E02 from guangzhou Youngun synthetic materials, inc.
The inorganic filler is one or more of aluminum hydroxide, magnesium hydroxide and JAZ-020 and JAZ-058 of Guangdong gold Ge new material GmbH.
The hydrophobic fumed silica is one or more of AEROSIL R202 and AEROSIL R972 of Shanghai Special chemical company, WACKER H15 and WACKER H20 of Germany Wacker chemical company, and CH-18 of Japan Asahi chemical company.
The MDI type isocyanate is formed by mixing MDI-100 and PM200 in a mass ratio of (0 to 1): 1.
The coupling agent is one or more of KH-550, KH-560 and KH-570; the water removing agent is one or more OF a water removing agent TI, a water removing agent OF, a water removing agent PTSI and a water removing agent BF-5.
And (2) uniformly mixing the polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to the volume ratio of 1.
Compared with the prior art, the invention has the beneficial effects that:
1. the polyurethane structural adhesive prepared by adopting the body flame-retardant modified bio-based polyol can replace the introduction of an additive flame retardant in the conventional technical means, and avoids the reduction of the shear strength and the thermal conductivity caused by the addition of the flame retardant;
2. the vegetable oil is modified to introduce a benzene ring structure, so that the structural adhesive product has higher rigidity and improved high-temperature resistance, and the shear strength test result at 60 ℃ can reach 8.0MPa at most;
3. the specific gravity is small, and the requirement of lightweight of the new energy battery is met.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the following examples.
All the starting materials used in the examples are commercially available, except where otherwise indicated.
Example 1
The flame-retardant high-temperature-resistant bi-component polyurethane structural adhesive comprises a polymer component and a polyurethane prepolymer component, wherein the volume ratio of the polymer component to the polyurethane prepolymer component is 1;
the polymer component comprises the following raw materials in parts by weight:
MPO：12
INOVOL C304：18
the main body flame-retardant modified bio-based polyol: 70
Dibutyl tin dilaurate: 0.05
JAZ-058：50
3A molecular sieve water absorbent: 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 polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to a volume ratio of 1;
the preparation method of the bulk flame-retardant modified bio-based polyol comprises the following steps:
(1) Esterification stage
Mixing the components in a molar ratio of 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol into a reaction kettle, introducing nitrogen, setting the temperature to be 170 ℃, and carrying out pre-esterification reaction for 4 hours to obtain esterified liquid CEPPA-EG;
(2) Polycondensation stage
Mixing refined castor oil, phthalic anhydride, ethylene glycol and esterified liquid CEPPA-EG according to the mass ratio of 50:14:5:31, adding the mixture into a reaction kettle, adding a catalyst tetrabutyl titanate and a stabilizer TPP, starting stirring, starting water discharging when the temperature is raised to 136 ℃, controlling the condensation reflux temperature to be 105 ℃, then raising the temperature to 225 ℃ in a gradual temperature raising manner, vacuumizing until the hydroxyl value is 230mgKOH/g and the water 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;
the polymer component comprises the following raw materials in parts by weight:
MPO：14
INOVOL R403：10
the main body flame-retardant modified bio-based polyol: 76
Bismuth isooctanoate: 0.04
JAZ-058：50
3A molecular sieve water absorbent: 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 polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to a volume ratio of 1;
the preparation method of the bulk flame-retardant modified bio-based polyol comprises the following steps:
(1) Esterification stage
Mixing the components in a molar ratio of 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol into a reaction kettle, introducing nitrogen, setting the temperature to be 180 ℃, and carrying out pre-esterification reaction 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 the mixture into a reaction kettle, adding a catalyst tetrabutyl titanate and a stabilizer TPP, starting stirring, discharging water when the temperature rises to 138 ℃, controlling the condensation reflux temperature to be 108 ℃, then raising the temperature to 230 ℃ in a gradual temperature rise mode, vacuumizing until the hydroxyl value is 200mgKOH/g and the water content is less than or equal to 0.05 percent, 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, wherein the volume ratio of the polymer component to the polyurethane prepolymer component is 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: 0.05
JAZ-020：48
3A molecular sieve water absorbent: 6
WACKER H20：3；
The polyurethane prepolymer component comprises the following raw materials in parts by weight:
PM200：60
MDI-100：40
a water removing agent BF-5:2
KH-560：6
JAZ-020：48
WACKER H20：3；
Uniformly mixing the polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to a volume ratio of 1;
the preparation method of the bulk flame-retardant modified bio-based polyol comprises the following steps:
(1) Esterification stage
Mixing the components in a molar ratio of 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol into a reaction kettle, introducing nitrogen, setting the temperature to be 180 ℃, and carrying out pre-esterification reaction for 3 hours to obtain esterified liquid CEPPA-EG;
(2) Polycondensation stage
Mixing refined soybean oil, phthalic anhydride, ethylene glycol and esterified liquid CEPPA-EG according to the mass ratio of 30:23.2:8.3:38.5 adding the mixture into a reaction kettle, adding a catalyst tetrabutyl titanate and a stabilizer TPP, starting stirring, discharging water when the temperature is raised to 135 ℃, controlling the condensation reflux temperature to be 100 ℃, then raising the temperature to 221 ℃ in a gradual temperature rise mode, vacuumizing until the hydroxyl value is 230mgKOH/g and the water 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, wherein the volume ratio of the polymer component to the polyurethane prepolymer component is 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 absorbent: 4
CH-18：4；
The polyurethane prepolymer component comprises the following raw materials in parts by weight:
PM200：60
MDI-100：40
a water removing agent BF-5:2
KH-570：4
Magnesium hydroxide: 50
CH-18：4；
Uniformly mixing the polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to a volume ratio of 1;
the preparation method of the bulk flame-retardant modified bio-based polyol comprises the following steps:
(1) Esterification stage
Mixing the components in a molar ratio of 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol into a reaction kettle, introducing nitrogen, setting the temperature to be 180 ℃, and carrying out pre-esterification reaction for 3 hours to obtain esterified liquid CEPPA-EG;
(2) Polycondensation stage
Refining soybean oil, phthalic anhydride, propylene glycol and esterified liquid CEPPA-EG according to the mass ratio of 20:29.2:12.2:38.6, adding the mixture into a reaction kettle, adding a catalyst tetrabutyl titanate and a stabilizer TPP, starting stirring, discharging water when the temperature is raised to 140 ℃, controlling the condensation reflux temperature to be 110 ℃, then raising the temperature to 235 ℃ in a gradual temperature raising manner, vacuumizing until the hydroxyl value is 180mgKOH/g and the water 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;
the polymer component comprises the following raw materials in parts by weight:
BDO：22
the main body flame-retardant modified bio-based polyol: 78
Dibutyl tin dilaurate: 0.02
Aluminum hydroxide: 42
3A molecular sieve water absorbent: 12
AEROSIL R 972：6；
The polyurethane prepolymer component comprises the following raw materials in parts by weight:
PM200：50
MDI-100：50
water removing agent TI:1
KH-560：4
Aluminum hydroxide: 50
AEROSIL R972：6；
Uniformly mixing the polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to a volume ratio of 1;
the preparation method of the bulk flame-retardant modified bio-based polyol comprises the following steps:
(1) Esterification stage
Mixing the components in a molar ratio of 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol into a reaction kettle, introducing nitrogen, setting the temperature to be 180 ℃, and carrying out pre-esterification reaction for 3 hours to obtain esterified liquid CEPPA-EG;
(2) Polycondensation stage
Mixing refined castor oil, phthalic anhydride, ethylene glycol and esterified liquid CEPPA-EG according to the mass ratio of 30:22.3:5.6:42.1, adding the mixture into a reaction kettle, adding a catalyst tetrabutyl titanate and a stabilizer TPP, starting stirring, discharging water when the temperature rises to 139 ℃, controlling the condensation reflux temperature to be 107 ℃, then raising the temperature to 232 ℃ in a gradual temperature rise mode, vacuumizing until the hydroxyl value is 180mgKOH/g and the water content is less than or equal to 0.05 percent, 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
Comparative example 1 is the same as example 2 except that the inorganic filler in the polymer component and the polyurethane prepolymer component is replaced with kaolin of the same weight.
Comparative example 2
Comparative example 2 is the same as example 5 except that MDI-100 was replaced with MDI-50 of the same weight.
Comparative example 3
Comparative example 3 is the same as example 4 except that the weight part of magnesium hydroxide in the polymer component and the polyurethane prepolymer component is 54.
Comparative example 4
This comparative example 4 is the same as example 1 except that 18 parts INOVOL C304 and 70 parts bulk flame retardant modified bio-based polyol are replaced with 34 parts INOVOL C304 and 54 parts castor oil polyol.
Comparative example 5
The two-component polyurethane structural adhesive of comparative example 5 comprises a polymer component and a polyurethane prepolymer component in a volume ratio of 1;
the polymer component comprises the following raw materials in parts by weight:
MPO：12
INOVOL C304：7
the main body flame-retardant modified bio-based polyol: 66
CDP：15
Dibutyl tin dilaurate: 0.05
JAZ-058：50
Water absorbent: 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 polymer component and the polyurethane prepolymer component, removing bubbles, and uniformly mixing according to a volume ratio of 1; the bulk flame retardant modified bio-based polyol was the same as in example 1.
And (4) performance testing:
the two-component polyurethane structural adhesives obtained in examples 1 to 5 and comparative examples 1 to 5 were subjected to a performance test according to the following standard or method, and the results are shown in table 1.
Density: GB/T4472-2011 determination of density and relative density of chemical products;
hardness: GB/T531.1-2008 "vulcanized rubber or thermoplastic rubber indentation hardness test method part I: shore Durometer method;
shear strength at 60 ℃: a sandwich structure test sample is manufactured according to 6061 Al-polyurethane structure adhesive-PET film-polyurethane structure adhesive-6061 Al, the thickness of an 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 & ltdetermination of tensile shear strength of adhesive (rigid material to rigid material) & gt standard, and the tensile speed is 100mm/min;
flame retardance: UL94 vertical burn test method.
TABLE 1 tables for testing the properties of the structural polyurethane adhesives in examples 1 to 5 and comparative examples 1 to 5
As can be seen from the data in Table 1, the flame retardant rating of the polyurethane structural adhesive can reach UL 94V-0 level, and the specific gravity is less than or equal to 1.40 g.cm -3 After being placed at room temperature for 7 days, the shear strength at 60 ℃ can reach 8.0MPa maximally, and all indexes are excellent. It is understood from comparative example 2 and comparative example 1 that although the specific gravity is reduced by replacing the inorganic filler with kaolin, the flame retardant grade is significantly reduced because kaolin is not decomposed endothermically to release water upon combustion like metal hydroxide. Comparing example 5 with comparative example 2, after MDI-100 was replaced with MDI-50, the hardness and high temperature resistance of the product were significantly reduced due to the reduced crystallinity of isocyanate. Comparing example 1 with comparative example 4, after replacing the vegetable-based polyol with the unmodified castor oil polyol, although the inorganic filler is a metal hydroxide, it is limited to a small amount, the flame retardant rating cannot meet the requirement, and the high temperature shear strength is low due to poor rigidity of the unmodified polyol. In comparative example 5, after introducing about 10 mass% of the liquid flame retardant CDP into the product system, since the flame retardant exists in the product system in a free form, the thermal stability is poor and the hard segment content of the product is reduced, resulting in a significant reduction in hardness and high temperature shear strength of the product. In comparative example 4 and comparative example 3, although the high-temperature shear strength was increased by increasing the amount of the system metal hydroxide filler, the specific gravity was also increased and the workability was deteriorated, and the requirement for weight reduction of the new energy battery at the present stage could not be satisfied.
Claims (7)
1. The flame-retardant high-temperature-resistant bi-component polyurethane structural adhesive is characterized by comprising the following components in a volume ratio of 1:1 and a polyurethane prepolymer component;
the polymer component comprises the following raw materials in parts by weight:
small-molecular polyol 11 to 22
Polyfunctional polyether polyol 0 to 23
60-78 parts of body flame-retardant modified bio-based polyol
Catalyst 0.02 to 0.22
Inorganic fillers 42 to 50
4-12 parts of 3A molecular sieve water absorbent
3 to 6 portions of hydrophobic fumed silica;
the polyurethane prepolymer comprises the following raw materials in parts by weight:
MDI type isocyanate 100
Water scavenger 1 to 3
Coupling agents 2 to 6
Inorganic fillers 48 to 52
2 to 6 portions 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 formed by mixing MDI-100 and PM200 in a mass ratio of (0 to 1): 1.
2. The flame-retardant high-temperature-resistant bi-component polyurethane structural adhesive as claimed in claim 1, wherein 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
Mixing the components in a molar ratio of 1.0:3.45 adding 2-carboxyethyl phenyl hypophosphorous acid and ethylene glycol into a reaction kettle, introducing nitrogen, setting the temperature to be 170 to 190 ℃, and carrying out pre-esterification reaction for 2 to 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 are mixed according to the mass ratio of (20 to 50): (14 to 29.2): (5 to 12.2): (31 to 42.8) adding the mixture into a reaction kettle, adding a catalyst tetrabutyl titanate and a stabilizer TPP, starting stirring, discharging water when the temperature is raised to 135 to 140 ℃, controlling the condensation reflux temperature to be 100 to 110 ℃, then raising the temperature to 220 to 235 ℃, vacuumizing until the hydroxyl value is 180 to 230mgKOH/g and the water content is less than or equal to 0.05 percent, and then cooling to obtain the catalyst; wherein the adding amount of the catalyst is 40 to 80ppm and the adding amount of the stabilizer is 40 to 80ppm based on the total mass of the materials put into the reaction kettle in the step (2).
3. The flame retardant high temperature resistant two-component polyurethane structural adhesive as claimed in claim 2, wherein the refined vegetable oil is one of refined castor oil, refined soybean oil and refined corn oil.
4. The flame-retardant high-temperature-resistant two-component polyurethane structural adhesive according to claim 1, wherein the small-molecular polyol is one or more of methyl propylene glycol, 1, 2-propylene glycol and 1, 4-butanediol; the multifunctional polyether polyol is one or more of INOVOL R403, INOVOL C305, INOVOL C304 and NJ 6209.
5. The flame-retardant high-temperature-resistant two-component polyurethane structural adhesive as claimed in 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.
6. The flame-retardant 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.
7. The flame-retardant high-temperature-resistant two-component polyurethane structural adhesive as claimed in claim 1, wherein the coupling agent is one or more of KH-550, KH-560 and KH-570; the water removing agent is one or more OF a water removing agent TI, a water removing agent OF, a water removing agent PTSI and a water removing agent BF-5.
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| CN111303820A (en) * | 2020-03-09 | 2020-06-19 | 杭州之江新材料有限公司 | Double-component polyurethane structural adhesive for bonding power battery and preparation method thereof |
| WO2021243817A1 (en) * | 2020-06-03 | 2021-12-09 | 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 therefor |
| CN112608707A (en) * | 2020-12-15 | 2021-04-06 | 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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| CN117467396A (en) * | 2023-12-27 | 2024-01-30 | 山东一诺威聚氨酯股份有限公司 | High-performance aluminum plate adhesive and preparation method thereof |
| CN117467396B (en) * | 2023-12-27 | 2024-04-12 | 山东一诺威聚氨酯股份有限公司 | High-performance aluminum plate adhesive and preparation method thereof |
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