Wide-temperature-range polyurethane hybrid gel as well as preparation method and application thereof

Abstract

The invention belongs to the field of polyurethane hybrid glue, and particularly relates to wide-temperature-range polyurethane hybrid glue and a preparation method and application thereof.The wide-temperature-range polyurethane hybrid glue comprises a component A and a component B. When the component A and the component B are mixed, the NCO / OH molar ratio is controlled to be 1.05-1.2: 1; the component A is prepared from the following components in parts by weight: 10 to 30 parts of polyether polyol, 10 to 30 parts of castor oil modified polyol, 5 to 20 parts of hydroxyl-terminated polybutadiene, 1 to 8 parts of chain extender, 20 to 40 parts of filler, 2 to 6 parts of fumed silica, 1 to 3 parts of water absorbent, 1 to 3 parts of coupling agent and 0.1 to 0.5 part of catalyst; the component B is prepared from the following components in parts by weight: 10 to 30 parts of hydroxyl-terminated polysiloxane, 20 to 40 parts of isocyanate, 15 to 40 parts of filler and 2 to 5 parts of fumed silica. The wide-temperature-range two-component polyurethane structural adhesive prepared by the invention can be applied to new energy automobile power battery bonding and structural bonding.

Description

Technical Field

[0001] This invention belongs to the field of polyurethane hybrid adhesives, specifically relating to a wide-temperature-range polyurethane hybrid adhesive, its preparation method, and its application. Background Technology

[0002] Polyurethane (PU) adhesives are widely used due to their excellent mechanical strength, bonding properties, and adjustable curing performance. However, their high-temperature and low-temperature performance is significantly insufficient, mainly due to the following limitations: Polyurethane consists of soft and hard segments. The soft segments are typically polyethers or polyesters, while the hard segments are isocyanates and chain extenders. The soft segments of polyurethane (such as polyethers and polyester polyols) are prone to chain segment movement at high temperatures (typically >80°C), leading to material softening, a decrease in modulus, and even loss of adhesive strength. The urethane bonds (-NHCOO-) in the hard segments may decompose at high temperatures (e.g., through hydrolysis, oxidation, or thermal cracking), disrupting the cross-linking network. In high-temperature and high-humidity environments, water molecules easily penetrate the adhesive layer, accelerating the hydrolysis reaction of polyurethane (especially the ester groups), further reducing temperature resistance and durability. For example, in the high-temperature environments of automotive engine compartments or electronic devices, polyurethane adhesives may lose adhesion or decompose, leading to component detachment or performance degradation. Therefore, improving the temperature resistance of polyurethane adhesives is crucial. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this invention provides a wide-temperature-range polyurethane hybrid adhesive, its preparation method, and its application. This invention improves the temperature resistance of polyurethane adhesives through molecular structure design and other means, thereby preparing a wide-temperature-range two-component polyurethane structural adhesive, which can be applied to the bonding and structural bonding of power batteries for new energy vehicles, overcoming the technical drawbacks of polyurethane adhesives in terms of high and low temperature impact resistance.

[0004] The specific technical solution is as follows: The first objective of this invention is to provide a wide-temperature-range polyurethane hybrid adhesive, comprising component A and component B, wherein the NCO / OH molar ratio of component A and component B is controlled at 1.05-1.2:1. Component A, by weight, comprises the following components: 10-30 parts of polyether polyol, 10-30 parts of castor oil-modified polyol, 5-20 parts of hydroxyl-terminated polybutadiene, 1-8 parts of chain extender, 20-40 parts of filler, 2-6 parts of fumed silica, 1-3 parts of water absorbent, 1-3 parts of coupling agent, and 0.1-0.5 parts of catalyst. Component B, by weight, comprises the following components: 10-30 parts of hydroxyl-terminated polysiloxane, 20-40 parts of isocyanate, 15-40 parts of filler, and 2-5 parts of fumed silicon.

[0005] Furthermore, the polyether polyol is polyoxypropylene glycol with a molecular weight of 400-2000.

[0006] The backbone of polyether polyols is an ether bond (-COC-), which has low internal rotational steric hindrance and very flexible molecular chains. These flexible polyether molecular chains are not easily "frozen" even at low temperatures, resulting in a low glass transition temperature (Tg). However, their tensile strength, tear strength, and hardness are generally inferior to polyester-based polyurethane adhesives. For structural bonding requiring high loads, they must be used in conjunction with polyester-based polyols. The preferred molecular weight of polyether polyols is between 400 and 2000. Commonly used polyether manufacturers include Shandong Yinuowei New Materials, Zibo Shangzheng New Materials, and Shandong Longhua New Materials, with grades such as PPG1000, PPG2000, PPG400, and PPG500.

[0007] Furthermore, the castor oil modified polyol is a hydrophobic oil polyol.

[0008] Castor oil's long, nonpolar aliphatic chains possess a strong hydrophobic effect, effectively preventing water molecules from penetrating and attacking the ester bonds in the polyester chain. This is its most significant improvement over ordinary polyester-based polyurethanes. The polyester segments provide rigidity, strength, and hardness; the long, flexible chains of castor oil provide toughness and impact resistance. It maintains the high tensile and tear strength of polyester-based adhesives while possessing better flexibility and elasticity, overcoming the relatively hardness of ordinary polyester-based adhesives. It is an outstanding example of "playing to one's strengths and avoiding weaknesses," perfectly solving the core problem of ordinary polyester-based polyurethanes' poor hydrolysis resistance, while avoiding the shortcomings of polyether-based polyurethanes in terms of strength and heat resistance. Although there are some compromises in color and low-temperature performance, it remains an ideal choice for many high-performance, weather-resistant applications. Commonly used castor oil-modified polyols include Ito's URIC AC series AC008 and AC009, and Vantrus Polycin D290.

[0009] Furthermore, the molecular weight of the hydroxyl-terminated polybutadiene is 1000-3000, and its glass transition temperature is below -70°C.

[0010] Hydroxyl-terminated polybutadiene (HTPB) is a low-molecular-weight liquid rubber whose molecular backbone consists of nonpolar hydrocarbon segments composed of saturated carbon-carbon and carbon-carbon double bonds, capped at both ends by hydroxyl groups. This unique structure determines that polyurethane adhesives prepared from it possess a series of extremely distinctive and irreplaceable properties. The HTPB backbone is a pure carbon-hydrogen structure, containing no easily hydrolyzed ester bonds (-COO-) or ether bonds (-COC-). These chemical bonds are very stable and difficult to break by water, acids, or alkalis. Furthermore, and most importantly, HTPB possesses excellent low-temperature flexibility and low-temperature resistance. Its glass transition temperature (Tg) is very low, reaching below -70°C, which can significantly improve the low-temperature performance of thermally conductive polyurethane structural adhesives, allowing them to maintain excellent elasticity and toughness even in ultra-low temperature environments without becoming brittle. Commonly used HTPB products include Evonik POLYVEST® EP HT and Clayville R45V.

[0011] Furthermore, the hydroxyl-terminated polysiloxane is a hydroxyl-terminated polydimethylsiloxane with a molecular weight of 500-5000.

[0012] Hydroxyl-terminated polysiloxanes possess extreme thermal stability and high-temperature resistance, resulting in polyurethanes made from them exhibiting significantly higher heat resistance than those based on polyethers, polyesters, or even HTPB. They can withstand long-term operating temperatures above 180°C and short-term temperatures of 250°C or even higher, while traditional polyurethanes typically soften and fail at 80-120°C. This addresses the biggest weakness of traditional polyurethanes—poor heat resistance. The reaction mechanism of copolymerizing hydroxyl-terminated polysiloxanes (HO-PDMS-OH) with polyurethane is primarily based on the stepwise addition polymerization of isocyanates (NCO) and hydroxyl groups (OH), introducing siloxane segments into the polyurethane backbone through urethane bonds (-NHCOO-). Hydroxyl-terminated PDMS (HO-PDMS-OH), acting as a soft-segment polyol, reacts with diisocyanates (such as diphenylmethane diisocyanate MDI or isophorone diisocyanate IPDI) to generate prepolymers with -NCO end groups.

[0013] The above is the structural formula of HO-PDMS-OH, and its reaction mechanism with isocyanate is as follows:

[0014] The hydroxyl groups (-OH) of PDMS react with isocyanates (-NCO) to form urethane bonds (-NHCOO-). Catalysts (such as dibutyltin dilaurate DBTDL) can be added to accelerate the reaction and lower the activation energy. Strict control of the raw material ratio (e.g., NCO / OH molar ratio ≈ 2:1) is necessary to ensure the formation of a prepolymer with -NCO end groups.

[0015] Furthermore, the chain extender is a small molecule diol, specifically, one or more of 1,4-butanediol, ethylene glycol, and diethylene glycol.

[0016] Furthermore, the water-absorbing agent is one or both of 3A and 5A molecular sieves.

[0017] Furthermore, the coupling agent is one or two of γ-(2,3-epoxypropoxy)propyltrimethoxysilane (KH-560), γ-methacryloyloxypropyltrimethoxysilane (KH-570), etc.

[0018] Furthermore, the catalyst is an environmentally friendly catalyst. Specifically, the catalyst is one or two of organic bismuth catalysts and organic bismuth-zinc composite catalysts, such as the organic bismuth-zinc catalyst of Guangzhou Yourun New Materials.

[0019] Furthermore, the filler is a thermally conductive filler and / or a reinforcing filler, and the filler is selected from one or more of alumina, aluminum hydroxide, silica powder, and calcium carbonate.

[0020] Furthermore, the isocyanate is selected from one or more of diphenylmethane diisocyanate (MDI), carbodiimide-modified MDI, and isophorone diisocyanate (IPDI), such as Wanhua Chemical's MDI, carbodiimide-modified MDI, and IPDI.

[0021] A second objective of this invention is to provide a method for preparing the above-mentioned wide-temperature-range polyurethane hybrid adhesive, comprising the following steps: Preparation of Component A: Polyether polyol, castor oil-modified polyol, and hydroxyl-terminated polybutadiene are dehydrated at 100-120℃ and a vacuum of -0.095MPa for 2-3 hours; the mixture is cooled to below 60℃, and chain extender, filler, water absorbent, coupling agent, fumed silica and catalyst are added. The mixture is stirred and mixed under nitrogen protection for 1-2 hours to obtain a homogeneous component A. Preparation of component B: Hydroxyl-terminated polysiloxane and isocyanate are reacted at 70-90℃ under nitrogen protection for 1-3 hours to generate terminal-NCO prepolymer; the terminal-NCO prepolymer is cooled to below 50℃, and filler and fumed silicon are added and stirred to mix evenly to obtain component B; Mix component A and component B at the NCO / OH molar ratio and stir for 3-10 minutes to obtain the wide-temperature-range polyurethane hybrid adhesive.

[0022] Furthermore, the curing conditions for the wide-temperature-range polyurethane hybrid adhesive are 48-72 hours at room temperature or 2-4 hours at 80°C.

[0023] The third objective of this invention is to provide the application of the above-mentioned wide-temperature-range polyurethane hybrid adhesive in the bonding of power batteries and structures for new energy vehicles.

[0024] A fourth object of the present invention is to provide the application of the above-mentioned wide-temperature-range polyurethane hybrid adhesive in the bonding of electronic components or automotive parts requiring a temperature resistance range of -50°C to 180°C.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention relates to a wide-temperature-range polyurethane hybrid adhesive. Compared to general-purpose two-component polyurethane adhesives, this adhesive introduces hydroxyl-terminated polysiloxane into the polyurethane (PU) backbone through chemical grafting. The resulting adhesive combines the advantages of both polyurethane and silicone, overcoming some of their respective drawbacks, and exhibits significant comprehensive advantages. It endows the entire material with excellent weather resistance and high / low temperature resistance, approaching that of silicone. Furthermore, the use of hydroxyl-terminated polybutadiene significantly improves low-temperature resistance, creating a synergistic effect. This adhesive is particularly suitable for harsh environments such as outdoor applications and automotive structural bonding, maintaining good adhesion performance in both high and low temperature environments without bond failure. In summary, the hydroxyl-terminated polydimethylsiloxane-grafted polyurethane adhesive is a high-performance "hybrid" material that successfully integrates the stability of silicone with the toughness of polyurethane. It is particularly suitable for high-end applications requiring weather resistance, temperature resistance, waterproofing, flexibility, and bonding of difficult-to-bond materials.

[0026] This invention improves the temperature resistance of polyurethane adhesives through molecular structure design and other means, thereby preparing a wide-temperature-range two-component polyurethane structural adhesive that can be used for bonding power batteries in new energy vehicles or bonding structural components, overcoming the technical drawbacks of polyurethane adhesives in terms of high and low temperature impact resistance. Detailed Implementation

[0027] The principles and features of the present invention are described below with reference to examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention. The parts mentioned in the specific embodiments are parts by weight.

[0028] Example 1 A wide-temperature-range polyurethane hybrid adhesive includes component A and component B, wherein the NCO / OH molar ratio of component A and component B is controlled at 1.10:1. Component A, by weight, comprises the following components: 20 parts of polyether polyol (PPG1000), 20 parts of castor oil modified polyol (Ito AC009), 10 parts of hydroxyl-terminated polybutadiene (Evonik POLYVEST® EP HT), 6 parts of chain extender (1,4-butanediol), 36 parts of filler (silica powder), 2 parts of water absorbent (3A molecular sieve), 2 parts of coupling agent (KH-560), 4 parts of fumed silica, and 0.2 parts of catalyst (organo-bismuth zinc). The B component, by weight, comprises the following components: 20 parts of hydroxyl-terminated polysiloxane (OH-PDMS-OH, molecular weight 1000), 40 parts of isocyanate IPDI, 36 parts of filler (silica powder), and 4 parts of fumed silica. A method for preparing a wide-temperature-range polyurethane hybrid adhesive includes the following steps: Preparation of Component A: Polyether polyol, castor oil modified polyol, and hydroxyl-terminated polybutadiene were dehydrated at 110°C and a vacuum of -0.095 MPa for 2 hours; the mixture was cooled to below 60°C, and chain extender, filler, water absorbent, coupling agent, fumed silica and catalyst were added. The mixture was stirred and mixed for 1 hour under nitrogen protection to obtain a homogeneous Component A. Preparation of component B: Hydroxyl-terminated polysiloxane and isocyanate were reacted at 80°C under nitrogen protection for 2 hours to generate terminal-NCO prepolymer; the terminal-NCO prepolymer was cooled to below 50°C, filler and fumed silicon were added, and the mixture was stirred and mixed evenly to obtain component B; Mix component A and component B at an NCO / OH molar ratio of 1.10:1 and stir for 5 minutes to obtain the wide-temperature-range polyurethane hybrid adhesive. The curing conditions are 80°C for 4 hours.

[0029] Example 2 A wide-temperature-range polyurethane hybrid adhesive includes component A and component B, wherein the NCO / OH molar ratio of component A and component B is controlled at 1.10:1. Component A, by weight, comprises the following components: 20 parts of polyether polyol (PPG1000), 20 parts of castor oil modified polyol (Ito AC009), 10 parts of hydroxyl-terminated polybutadiene (Evonik POLYVEST® EP HT), 6 parts of chain extender (1,4-butanediol), 36 parts of filler (silica powder), 2 parts of water absorbent (3A molecular sieve), 2 parts of coupling agent (KH-560), 4 parts of fumed silica, and 0.2 parts of catalyst (organo-bismuth zinc). The B component, by weight, comprises the following components: 30 parts of hydroxyl-terminated polysiloxane (OH-PDMS-OH, molecular weight 1000), 40 parts of isocyanate IPDI, 26 parts of filler (silica powder), and 4 parts of fumed silica. A method for preparing a wide-temperature-range polyurethane hybrid adhesive, as described in Example 1.

[0030] Example 3 A wide-temperature-range polyurethane hybrid adhesive includes component A and component B, wherein the NCO / OH molar ratio of component A and component B is controlled at 1.10:1. Component A, by weight, comprises the following components: 20 parts of polyether polyol (PPG1000), 20 parts of castor oil modified polyol (Ito AC009), 20 parts of hydroxyl-terminated polybutadiene (Evonik POLYVEST® EP HT), 6 parts of chain extender (1,4-butanediol), 26 parts of filler (silica powder), 2 parts of water absorbent (3A molecular sieve), 2 parts of coupling agent (KH-560), 4 parts of fumed silica, and 0.2 parts of catalyst (organo-bismuth zinc). The B component, by weight, comprises the following components: 30 parts of hydroxyl-terminated polysiloxane (OH-PDMS-OH, molecular weight 1000), 40 parts of IPDI, 26 parts of filler (silica powder), and 4 parts of fumed silica. A method for preparing a wide-temperature-range polyurethane hybrid adhesive, as described in Example 1.

[0031] Comparative Example 1 A polyurethane adhesive includes component A and component B, wherein the NCO / OH molar ratio of component A and component B is controlled at 1.10:1 when they are mixed. Component A, by weight, comprises the following components: 20 parts of polyether polyol (PPG1000), 20 parts of castor oil modified polyol (Ito AC009), 6 parts of chain extender (1,4-butanediol), 46 parts of filler (silica powder), 2 parts of water absorbent (3A molecular sieve), 2 parts of coupling agent (KH-560), 4 parts of fumed silica, and 0.2 parts of catalyst (organo-bismuth zinc). The B component, by weight, includes the following components: 20 parts of polyether polyol (PPG1000, molecular weight 1000), 40 parts of isocyanate IPDI, 36 parts of filler (silica powder), and 4 parts of fumed silica. A method for preparing a polyurethane adhesive includes the following steps: Preparation of component A: Polyether polyol and castor oil modified polyol were dehydrated at 110℃ and vacuum degree below -0.095MPa for 2 hours; the mixture was cooled to below 60℃, and chain extender, filler, water absorbent, coupling agent, fumed silica and catalyst were added. The mixture was stirred and mixed for 1 hour under nitrogen protection to obtain a uniform component A. Preparation of component B: Polyether polyol and isocyanate were reacted at 80°C under nitrogen protection for 2 hours to generate terminal-NCO prepolymer; the terminal-NCO prepolymer was cooled to below 50°C, filler and fumed silica were added, and the mixture was stirred and mixed evenly to obtain component B; Mix component A and component B at an NCO / OH molar ratio of 1.10:1 and stir for 5 minutes to obtain the polyurethane adhesive. The curing conditions are 80°C for 4 hours.

[0032] test: The thermal properties, hydrolytic properties, and adhesive properties of the products prepared in Examples 1-3 and Comparative Example 1 were tested respectively, and the test data are shown in Table 1.

[0033] The following data are based on laboratory tests (referencing ASTM standards), with the test sample being an aluminum-aluminum bonded joint (25mm × 100mm × 1.5mm).

[0034] Table 1 Test data for each embodiment and comparative example

[0035] By comparing the test data in Table 1, it can be seen that, in terms of thermal performance, the thermal decomposition temperatures of Examples 1, 2, and 3 are significantly higher than those of Comparative Example 1, thanks to the high bond energy of the organosilicon segments; in terms of low-temperature performance, the glass transition temperature (Tg) of the examples is lower, indicating that they still maintain flexibility in extremely cold environments; in terms of adhesive strength, the examples have a higher adhesive strength retention rate at both high and low temperatures, showing wide-temperature-range stability; in terms of hydrolysis resistance, the castor oil-modified polyol and organosilicon (hydroxyl-terminated polysiloxane) of the examples synergistically improve hydrolysis resistance; and, the wide-temperature-range polyurethane hybrid adhesives of Examples 2 and 3 have adjusted the content of hydroxyl-terminated polysiloxane, making them high-organosilicon content variants, which makes the entire material closer to the excellent weather resistance and high and low temperature resistance of organosilicon.

[0036] The bond energy of the -Si-O-Si- main chain of organosilicon (approximately 443 kJ / mol) is much higher than that of the -CC- (approximately 347 kJ / mol) and -CO- (approximately 351 kJ / mol) main chains of polyurethane. Furthermore, organosilicon has longer bond lengths, larger bond angles, and greater rotational freedom, resulting in greater stability. The introduction of organosilicon into the polyurethane hybrid adhesive of this invention significantly increases the thermal decomposition temperature to above 250°C, maintaining better mechanical properties and adhesive strength at high temperatures. Moreover, the glass transition temperature (Tg) of the organosilicon segments is extremely low (down to below -120°C), allowing the modified adhesive to maintain good elasticity and toughness even in extremely cold environments (such as -40°C or even lower). In addition, the use of hydroxyl-terminated polybutadiene in the formulation further improves the low-temperature resistance of the adhesive, preventing embrittlement and cracking, and broadening the adhesive's operating temperature range.

[0037] In summary, through comparison of the comparative examples and embodiments, the embodiments of the present invention have constructed a wide-temperature-range polyurethane hybrid adhesive by introducing terminal hydroxyl polysiloxane, which significantly improves the high and low temperature resistance and hydrolysis resistance of polyurethane adhesives, making them suitable for harsh environments such as power batteries and structural bonding in new energy vehicles.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wide-temperature-range polyurethane hybrid adhesive, characterized in that, It includes component A and component B, wherein the NCO / OH molar ratio of component A and component B is controlled at 1.05-1.2:1; Component A, by weight, comprises the following components: 10-30 parts of polyether polyol, 10-30 parts of castor oil-modified polyol, 5-20 parts of hydroxyl-terminated polybutadiene, 1-8 parts of chain extender, 20-40 parts of filler, 2-6 parts of fumed silica, 1-3 parts of water absorbent, 1-3 parts of coupling agent, and 0.1-0.5 parts of catalyst. Component B, by weight, comprises the following components: 10-30 parts of hydroxyl-terminated polysiloxane, 20-40 parts of isocyanate, 15-40 parts of filler, and 2-5 parts of fumed silicon.

2. The wide-temperature-range polyurethane hybrid adhesive according to claim 1, characterized in that, The polyether polyol is polyoxypropylene glycol with a molecular weight of 400-2000; The castor oil-modified polyol is a hydrophobic oil polyol; The hydroxyl-terminated polybutadiene has a molecular weight of 1000-3000 and a glass transition temperature below -60°C.

3. The wide-temperature-range polyurethane hybrid adhesive according to claim 1, characterized in that, The hydroxyl-terminated polysiloxane is a hydroxyl-terminated polydimethylsiloxane with a molecular weight of 500-5000.

4. The wide-temperature-range polyurethane hybrid adhesive according to claim 1, characterized in that, The chain extender is one or more of 1,4-butanediol, ethylene glycol, and diethylene glycol. The water-absorbing agent is one or two of 3A and 5A molecular sieves; The coupling agent is one or both of γ-(2,3-epoxypropoxy)propyltrimethoxysilane and γ-methacryloxypropyltrimethoxysilane. The catalyst is one or both of organic bismuth and organic bismuth-zinc composite catalysts.

5. The wide-temperature-range polyurethane hybrid adhesive according to claim 1, characterized in that, The filler is a thermally conductive filler or a reinforcing filler, and the filler is selected from one or more of alumina, aluminum hydroxide, silica powder, and calcium carbonate.

6. The wide-temperature-range polyurethane hybrid adhesive according to claim 1, characterized in that, The isocyanate is selected from one or more of diphenylmethane diisocyanate (MDI), carbodiimide-modified MDI, and isophorone diisocyanate (IPDI).

7. A method for preparing a wide-temperature-range polyurethane hybrid adhesive as described in any one of claims 1 to 6, characterized in that, Includes the following steps: Preparation of Component A: Polyether polyol, castor oil-modified polyol, and hydroxyl-terminated polybutadiene are dehydrated at 100-120℃ and a vacuum of -0.095MPa for 2-3 hours; the mixture is cooled to below 60℃, and chain extender, filler, desiccant, coupling agent, fumed silica and catalyst are added. The mixture is stirred and mixed under nitrogen protection for 1-2 hours to obtain a homogeneous component A. Preparation of component B: Hydroxyl-terminated polysiloxane and isocyanate are reacted at 70-90℃ under nitrogen protection for 1-3 hours to generate terminal-NCO prepolymer; the terminal-NCO prepolymer is cooled to below 50℃, filler and fumed silicon are added, and the mixture is stirred and mixed evenly to obtain component B; Mix component A and component B at the NCO / OH molar ratio and stir to obtain the wide-temperature-range polyurethane hybrid adhesive.

8. The method for preparing the wide-temperature-range polyurethane hybrid adhesive according to claim 7, characterized in that, The curing conditions for the wide-temperature-range polyurethane hybrid adhesive are 48-72 hours at room temperature or 2-4 hours at 80°C.

9. The application of a wide-temperature-range polyurethane hybrid adhesive as described in any one of claims 1 to 6 in the bonding or structural bonding of power batteries for new energy vehicles.

10. The application of a wide-temperature-range polyurethane hybrid adhesive as described in any one of claims 1 to 6 in the bonding of electronic components or automotive parts requiring a temperature resistance range of -50°C to 180°C.

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