Amorphous poly-alpha-olefin hot melt adhesive grafted with siloxane at low temperature and preparation method of amorphous poly-alpha-olefin hot melt adhesive

Abstract

The invention discloses amorphous poly-alpha-olefin grafted with siloxane at low temperature as well as a preparation method and application of the amorphous poly-alpha-olefin. The invention relates to amorphous poly alpha olefin grafted with siloxane at low temperature, which is prepared from the following components in parts by mass: 30 to 75 parts of amorphous poly alpha olefin, 5 to 20 parts of low molecular weight polyisobutene, 30 to 50 parts of C5 resin, 1 to 5 parts of vinyl trimethoxy silane, 0.5 to 1.0 part of antioxidant, 0.5 to 1.0 part of initiator and 0.1 to 0.5 part of dibutyltin dilaurate. According to the invention, the low molecular weight polyisobutene and the C5 resin are subjected to melt blending with the amorphous poly-alpha olefin, and then grafting is carried out, so that the melt viscosity of the amorphous poly-alpha olefin is effectively reduced, and the grafting reaction can be carried out at a relatively low temperature.

Description

Technical field:

[0001] The present invention relates to the technical field of adhesives, and in particular to a low-temperature grafted silicone amorphous poly-alpha-olefin hot melt adhesive and a preparation method thereof. Background technology:

[0002] Currently, a common chemical modification method for amorphous polyalphaolefin hot melt adhesives is to graft silicones, making the adhesive reactive and improving adhesion and bond strength to a variety of polar substrates. The grafted silicones can also crosslink with each other to increase the cohesive strength of the adhesive. A common modification method involves heating the amorphous polyalphaolefin to a molten state and reacting it with a vinyl silicone in the presence of an initiator to produce a free radical reaction. A commonly used vinyl silicone is vinyltrimethoxysilane, which is highly reactive and has a boiling point of 123°C at normal pressure. Organic peroxides are commonly used as initiators for grafting, and their decomposition temperature is typically above 100°C. Excessively high temperatures can lead to rapid decomposition of the initiator, resulting in the formation of more free radicals, which can accelerate the reaction and even cause a runaway reaction. Excessively low temperatures reduce the free radical production of the initiator, affecting the efficiency of the grafting. Typically, the softening point of most amorphous polyalphaolefins is above 100°C. Maintaining a low-viscosity melt requires temperatures above 150°C. Vinyltrimethoxysilane easily vaporizes in a vacuum environment above 123°C, reducing the amount of vinyltrimethoxysilane in the reaction system and its utilization rate. This problem urgently needs to be addressed. Summary of the invention:

[0003] The present invention solves the problems existing in the prior art and provides a low-temperature grafted siloxane amorphous polyalphaolefin and a preparation method thereof. The present invention reduces the melt viscosity of the reaction system by blending low-molecular-weight polyisobutylene with the amorphous polyalphaolefin, enables the reaction to proceed at a lower temperature, reduces the gasification of vinyltrimethoxysilane, and improves the utilization rate of vinyltrimethoxysilane.

[0004] The first object of the present invention is to provide a low-temperature grafted siloxane amorphous polyalphaolefin, which is prepared from the following components, calculated by weight: 30 to 75 parts of amorphous polyalphaolefin, 5 to 20 parts of low molecular weight polyisobutylene, 30 to 50 parts of C5 resin, 1 to 5 parts of vinyltrimethoxysilane, 0.5 to 1.0 parts of antioxidant, 0.5 to 1.0 parts of initiator, and 0.1 to 0.5 parts of dibutyltin dilaurate.

[0005] This invention addresses the shortcomings of polyolefin hot-melt adhesives, such as low cohesive strength and poor adhesion to polar substrates. By grafting silane onto the adhesive, the molecular chains react with polar substrates and cross-link the chains via the silane, thereby enhancing the cohesive strength and adhesion to polar substrates. The addition of low-molecular-weight polyisobutylene reduces the reaction temperature and viscosity of the reaction system, thereby increasing the utilization rate of vinyltrimethoxysilane.

[0006] Preferably, the low-temperature grafted silicone amorphous polyalphaolefin is prepared from the following components, in parts by mass: 40-70 parts of amorphous polyalphaolefin, 10-20 parts of low molecular weight polyisobutylene, 40-50 parts of C5 resin, 1-5 parts of vinyltrimethoxysilane, 0.5-1.0 part of antioxidant, 0.5-1.0 part of initiator, and 0.1-0.5 part of dibutyltin dilaurate.

[0007] Further preferably, the low-temperature grafted siloxane amorphous polyalphaolefin is prepared from the following components, in parts by mass: 40-60 parts of amorphous polyalphaolefin, 10-20 parts of low molecular weight polyisobutylene, 40-50 parts of C5 resin, 1-5 parts of vinyltrimethoxysilane, 0.5-1.0 part of antioxidant, 0.5-1.0 part of initiator, and 0.1-0.5 part of dibutyltin dilaurate.

[0008] Preferably, the molecular weight of the low molecular weight polyisobutylene is 950-1400.

[0009] More preferably, the molecular weight of the low molecular weight polyisobutylene is 1300.

[0010] Preferably, the antioxidant is antioxidant 1010 or antioxidant 3114.

[0011] Preferably, the initiator is tert-butyl peroxypivalate (1,1-dimethylethyl 2,2-dimethylperoxypropionate).

[0012] The second object of the present invention is to provide a method for preparing the low-temperature grafted silicone amorphous polyalphaolefin hot melt adhesive, comprising the following steps: uniformly mixing 10% to 20% of the mass of a C5 resin or a low molecular weight polyisobutylene with dibutyltin dilaurate, sequentially adding 50% to 70% of the mass of a C5 resin or a low molecular weight polyisobutylene, an antioxidant, and an amorphous polyalphaolefin into a reaction vessel preheated to 100° C. to 120° C., starting stirring and vacuum degassing, continuing stirring for 1 to 2 hours, and sequentially adding the C5 resin or a low molecular weight polyisobutylene and dibutyltin dilaurate into the reaction vessel. A mixture of dibutyltin lauryl alcohol, vinyltrimethoxysilane, and the remaining C5 resin and low molecular weight polyisobutylene is stirred and vacuum degassing is started. After stirring for 0.3 to 0.8 hours, an initiator is added, stirred and vacuum degassing is started. After continuous stirring for 0.3 to 0.8 hours, the temperature is raised to 130° C. to 150° C. to vacuum degassing unreacted vinyltrimethoxysiloxane. After continuous stirring for 0.5 to 1.5 hours, the temperature is lowered to 100° C. to 110° C., and after stirring and vacuum degassing for 0.2 to 0.3 hours, the low-temperature grafted siloxane amorphous polyalphaolefin hot melt adhesive is obtained.

[0013] Preferably, the preparation method comprises the following specific steps: uniformly mixing 10% to 20% of the mass of C5 resin or low molecular weight polyisobutylene with dibutyltin dilaurate, sequentially adding 50% to 70% of the mass of C5 resin or low molecular weight polyisobutylene, an antioxidant, and amorphous polyalphaolefin into a reaction vessel preheated to 115° C., starting stirring and vacuum degassing, continuing stirring for 1.5 hours, sequentially adding a mixture of C5 resin or low molecular weight polyisobutylene and dibutyltin dilaurate, vinyltrimethoxysilane, and the remaining C5 resin and low molecular weight polyisobutylene into the reaction vessel, stirring and starting vacuum degassing, stirring for 0.5 hours, adding an initiator, stirring and starting vacuum degassing, continuing stirring for 0.5 hours, heating to 140° C. and vacuum removing unreacted vinyltrimethoxysiloxane, continuing stirring for 1 hour, cooling to 105° C., stirring and vacuum degassing for 0.25 hours, and obtaining the amorphous polyalphaolefin hot melt adhesive grafted with silicone at a low temperature.

[0014] The present invention heats and mixes low-molecular-weight polyisobutylene with amorphous polyalphaolefin, and then reacts the mixture with vinyltrimethoxysilane and tert-butyl peroxypivalate (1,1-dimethylethyl 2,2-dimethylperoxypropionate, TBPV). The low-molecular-weight polyisobutylene and amorphous polyalphaolefin blend lower the melt viscosity of the reaction system, allowing the reaction to proceed at a lower temperature. This reduces the vaporization of vinyltrimethoxysilane and improves its utilization.

[0015] The present invention also protects the use of the low-temperature silicone-grafted amorphous polyalphaolefin hot melt adhesive for bonding and sealing electronic consumer products and new energy batteries. The amorphous polyalphaolefin proposed in the present invention is blended with low-molecular-weight polyisobutylene and C5 resin and then grafted. The grafted product can be used alone as a reactive polyolefin hot melt adhesive or as a raw material for reactive hot melt adhesives.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The present invention uses low molecular weight polyisobutylene and C5 resin to melt blend with amorphous polyalphaolefin and then grafts them, which effectively reduces the melt viscosity of the amorphous polyalphaolefin and allows the grafting reaction to be carried out at a lower temperature.

[0018] 2. The grafting reaction is carried out at a relatively low temperature, which is lower than the boiling point of vinyl trimethoxysiloxane, thereby improving the utilization rate of vinyl trimethoxysiloxane.

[0019] 3. The present invention uses tert-butyl peroxypivalate as an initiator for the grafting reaction, which has a half-life temperature of 94° C. at 0.1 hours, and can efficiently and quickly carry out the grafting reaction at a lower temperature.

[0020] 4. The present invention uses amorphous poly-α-olefin, low molecular weight polyisobutylene and C5 resin to blend and then graft. The grafted product can be used alone as a reactive polyolefin hot melt adhesive, and can also be used as a raw material for a reactive hot melt adhesive. Specific implementation method:

[0021] The following examples are provided to further illustrate the present invention, but are not intended to limit the present invention.

[0022] Unless otherwise defined, all technical terms used hereinafter have the same meanings as those generally understood by those skilled in the art. The technical terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the scope of protection of the present invention. Unless otherwise specified, the experimental materials and reagents herein are conventional commercial products in the art.

[0023] Amorphous polyalphaolefin was purchased from Qida Chemical under the product number E-Melt 9000. Low molecular weight polyisobutylene was purchased from Dalin Chemical under the product number PB1300. C5 resin was purchased from Henghe Materials under the product number HHC-1100. Antioxidants were purchased from BASF under the product numbers Antioxidant 1010 or Antioxidant 3114.

[0024] Example 1

[0025] The low-temperature grafted siloxane amorphous polyalphaolefin is prepared from the following components, calculated by weight: 50 parts of amorphous polyalphaolefin, 10 parts of low molecular weight polyisobutylene, 40 parts of C5 resin, 3 parts of vinyltrimethoxysilane, 0.5 parts of antioxidant 1010, 0.5 parts of tert-butyl peroxypivalate, and 0.5 parts of dibutyltin dilaurate.

[0026] The preparation method of the amorphous polyalphaolefin grafted with low-temperature silicone comprises the following steps: uniformly mixing 15% of the mass of a C5 resin with dibutyltin dilaurate, sequentially adding 60% of the mass of the C5 resin, an antioxidant 1010, and an amorphous polyalphaolefin into a reaction vessel preheated to 115° C., starting stirring and vacuum degassing, continuing stirring for 1.5 hours, adding a mixture of the C5 resin and dibutyltin dilaurate, vinyltrimethoxysilane, and the remaining C5 resin and low-molecular-weight polyisobutylene into the reaction vessel, stirring and starting vacuum degassing, stirring for 0.5 hours, adding tert-butyl peroxypivalate, stirring and starting vacuum degassing, continuing stirring for 0.5 hours, heating to 140° C. to remove unreacted vinyltrimethoxysiloxane in vacuum, continuing stirring for 1 hour, cooling to 105° C., stirring and vacuum degassing for 0.25 hours, and obtaining the amorphous polyalphaolefin grafted with low-temperature silicone.

[0027] Example 2

[0028] The low-temperature grafted siloxane amorphous polyalphaolefin is prepared from the following components, calculated by weight: 50 parts of amorphous polyalphaolefin, 10 parts of low molecular weight polyisobutylene, 40 parts of C5 resin, and 10100.5 parts of antioxidant.

[0029] The preparation method of the above-mentioned amorphous polyalphaolefin hot melt adhesive includes the following steps: 60% of the mass of the C5 resin, antioxidant 1010, and amorphous polyalphaolefin are added to a reaction vessel preheated to 115°C in sequence, stirring and vacuum degassing are started, and after continuous stirring for 1.5 hours, the remaining C5 resin and low molecular weight polyisobutylene are added to the reaction vessel, stirring and starting vacuum degassing, and after stirring for 0.5 hours, the amorphous polyalphaolefin hot melt adhesive is obtained.

[0030] Example 3

[0031] The amorphous poly-alpha olefin hot melt adhesive grafted with silicone is prepared from the following components, calculated by weight: 50 parts of amorphous poly-alpha olefin, 10 parts of low molecular weight polyisobutylene, 40 parts of C5 resin, 5 parts of vinyltrimethoxysilane, 10100.5 parts of antioxidant, 1 part of tert-butyl peroxypivalate, and 1 part of dibutyltin dilaurate.

[0032] The preparation steps of the low-temperature silicone grafted amorphous poly-α-olefin are the same as those in Example 1.

[0033] Example 4

[0034] Low temperature grafting of siloxane onto amorphous polyalphaolefin was prepared by using the following components in parts by mass: amorphous polyalphaolefin 50 parts, low molecular weight polyisobutylene 20 parts, carbon five resin 40 parts, vinyl trimethoxysilane 3 parts, antioxidant 1010 0.5 parts, t-butyl peroxy pivalate 0.5 parts, and dibutyl tin dilaurate 0.5 parts.

[0035] The preparation procedure of low temperature grafting of siloxane onto amorphous polyalphaolefin was the same as that of Example 1.

[0036] Example 5

[0037] Low temperature grafting of siloxane onto amorphous polyalphaolefin was prepared by using the following components in parts by mass: amorphous polyalphaolefin 50 parts, low molecular weight polyisobutylene 20 parts, carbon five resin 40 parts, vinyl trimethoxysilane 3 parts, antioxidant 1010 0.5 parts, t-butyl peroxy pivalate 0.5 parts, and dibutyl tin dilaurate 0.5 parts.

[0038] The preparation procedure of low temperature grafting of siloxane onto amorphous polyalphaolefin was the same as that of Example 1.

[0039] Example 6

[0040] Low temperature grafting of siloxane onto amorphous polyalphaolefin was prepared by using the following components in parts by mass: amorphous polyalphaolefin 50 parts, low molecular weight polyisobutylene 20 parts, carbon five resin 40 parts, vinyl trimethoxysilane 3 parts, antioxidant 1010 0.5 parts, t-butyl peroxy pivalate 0.5 parts, and dibutyl tin dilaurate 0.5 parts.

[0041] The preparation procedure of low temperature grafting of siloxane onto amorphous polyalphaolefin was the same as that of Example 1.

[0042] Example 7

[0043] Low temperature grafting of siloxane onto amorphous polyalphaolefin was prepared by using the following components in parts by mass: amorphous polyalphaolefin 50 parts, low molecular weight polyisobutylene 20 parts, carbon five resin 40 parts, vinyl trimethoxysilane 3 parts, antioxidant 1010 0.5 parts, t-butyl peroxy pivalate 0.5 parts, and dibutyl tin dilaurate 0.5 parts.

[0044] The preparation procedure of low temperature grafting of siloxane onto amorphous polyalphaolefin was the same as that of Example 1.

[0045] Example 8

[0046] The low-temperature grafted siloxane amorphous poly-alpha olefin is prepared from the following components in mass parts: amorphous poly-alpha olefin 60 parts, low molecular weight polyisobutylene 10 parts, carbon five resin 40 parts, vinyl trimethoxysilane 3 parts, antioxidant 1010 0.5 parts, t-butyl peroxy pivalate 0.5 parts, and dibutyl tin dilaurate 0.5 parts.

[0047] The low-temperature grafted siloxane amorphous poly-alpha olefin is prepared from the following components in mass parts: amorphous poly-alpha olefin 60 parts, low molecular weight polyisobutylene 10 parts, carbon five resin 40 parts, vinyl trimethoxysilane 3 parts, antioxidant 1010 0.5 parts, t-butyl peroxy pivalate 0.5 parts, and dibutyl tin dilaurate 0.5 parts.

[0048] Example 9

[0049] The low-temperature grafted siloxane amorphous poly-alpha olefin is prepared from the following components in mass parts: amorphous poly-alpha olefin 60 parts, low molecular weight polyisobutylene 10 parts, carbon five resin 40 parts, vinyl trimethoxysilane 3 parts, antioxidant 1010 0.5 parts, t-butyl peroxy pivalate 0.5 parts, and dibutyl tin dilaurate 0.5 parts.

[0050] The low-temperature grafted siloxane amorphous poly-alpha olefin is prepared from the following components in mass parts: amorphous poly-alpha olefin 60 parts, low molecular weight polyisobutylene 10 parts, carbon five resin 40 parts, vinyl trimethoxysilane 3 parts, antioxidant 1010 0.5 parts, t-butyl peroxy pivalate 0.5 parts, and dibutyl tin dilaurate 0.5 parts.

[0051] Example 10

[0052] The low-temperature grafted siloxane amorphous poly-alpha olefin is prepared from the following components in mass parts: amorphous poly-alpha olefin 60 parts, low molecular weight polyisobutylene 10 parts, carbon five resin 40 parts, vinyl trimethoxysilane 3 parts, antioxidant 1010 0.5 parts, t-butyl peroxy pivalate 0.5 parts, and dibutyl tin dilaurate 0.5 parts.

[0053] The low-temperature grafted siloxane amorphous poly-alpha olefin is prepared from the following components in mass parts: amorphous poly-alpha olefin 60 parts, low molecular weight polyisobutylene 10 parts, carbon five resin 40 parts, vinyl trimethoxysilane 3 parts, antioxidant 1010 0.5 parts, t-butyl peroxy pivalate 0.5 parts, and dibutyl tin dilaurate 0.5 parts.

[0054] Example 11

[0055] The low-temperature grafted siloxane amorphous polyalphaolefin is prepared from the following components, calculated by weight: 70 parts of amorphous polyalphaolefin, 20 parts of low molecular weight polyisobutylene, 50 parts of C5 resin, 5 parts of vinyltrimethoxysilane, 10101 parts of antioxidant, 1 part of tert-butyl peroxypivalate, and 0.5 parts of dibutyltin dilaurate.

[0056] The preparation method of the above-mentioned grafted silicone amorphous polyalphaolefin comprises the following steps: uniformly mixing 20% ​​of the mass of C5 resin or low molecular weight polyisobutylene with dibutyltin dilaurate, sequentially adding 70% of the mass of C5 resin or low molecular weight polyisobutylene, an antioxidant, and amorphous polyalphaolefin into a reaction vessel preheated to 120°C, starting stirring and vacuum degassing, continuing stirring for 2 hours, sequentially adding a mixture of C5 resin or low molecular weight polyisobutylene and dibutyltin dilaurate, vinyltrimethoxysilane, and the remaining C5 resin and low molecular weight polyisobutylene into the reaction vessel, stirring and starting vacuum degassing, stirring for 0.8 hours, adding an initiator, stirring and starting vacuum degassing, continuing stirring for 0.8 hours, heating to 150°C to remove unreacted vinyltrimethoxysiloxane in vacuum, continuing stirring for 1.5 hours, cooling to 110°C, stirring and vacuum degassing for 0.3 hours, and obtaining a low-temperature grafted silicone amorphous polyalphaolefin hot melt adhesive.

[0057] Table 1 shows the mass fractions of each component in Examples 1-11, as shown in Table 1.

[0058] Table 1

[0059]

[0060] The products obtained in Examples 1-11 were tested, and the results are shown in Table 2.

[0061] Table 2

[0062]

[0063]

[0064] Glue application temperature: refers to the temperature at which the hot melt adhesive is heated from a solid state to a thinner liquid state in the application scenario and can achieve uninterrupted material transportation through a screw or gear pump.

[0065] Open time: The maximum time allowed for hot melt adhesive to be placed under specified bonding conditions after application in accordance with the method of "HG / T 3716-2003 Determination of open time of hot melt adhesives" before more than 50% of the bonded materials are peeled off and damaged.

[0066] Melt viscosity: measured using a Brookfield rotational viscometer in accordance with the method of HG / T 3660-1999 Hot Melt Adhesives - Determination of Melt Viscosity.

[0067] Shear strength: According to the method of GB / T 7124-2008 Determination of tensile shear strength of adhesives, the test is carried out using PP to PP single overlap joints.

[0068] From Table 1 and Table 2, it can be seen that when comparing Examples 2, 1, and 3, the shear strength and thermal failure temperature are significantly improved, indicating that the grafted monomer has a significant improvement on the performance. When comparing Examples 4, 1, and 5, the melt viscosity decreases successively, the open time increases successively, and the thermal failure temperature and shear strength decrease successively, indicating that PIB has a significant effect on the use process and has a certain impact on the performance. When comparing Examples 1 and 6, the shear strength increases, indicating that increasing the proportion of C5 resin can improve the performance. When comparing Examples 1 and 7, the viscosity decreases and the shear strength increases, indicating that C5 resin and PIB have improved the performance and use process. When comparing Examples 1 and 8, the viscosity increases significantly, the open time increases, and the shear strength increases, indicating that increasing the proportion of APAO can improve the performance. When comparing Examples 1 and 9, the thermal failure temperature decreases to a certain extent, which indirectly indicates that the higher the reaction temperature, the lower the effective utilization rate of vinyltrimethoxysiloxane.

[0069] The description of the above embodiments is only used to help understand the technical solution and core ideas of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention. These improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A low-temperature silicone grafted amorphous poly-α-olefin hot melt adhesive, characterized in that: The invention is prepared from the following components in parts by mass: 30-75 parts of amorphous polyalphaolefin, 5-20 parts of low molecular weight polyisobutylene, 30-50 parts of C5 resin, 1-5 parts of vinyltrimethoxysilane, 0.5-1.0 parts of antioxidant, 0.5-1.0 parts of initiator and 0.1-0.5 parts of dibutyltin dilaurate.

2. The low-temperature grafted siloxane amorphous poly-alpha-olefin according to claim 1, characterized in that: The invention is prepared from the following components in parts by mass: 40-70 parts of amorphous polyalphaolefin, 10-20 parts of low molecular weight polyisobutylene, 40-50 parts of C5 resin, 1-5 parts of vinyltrimethoxysilane, 0.5-1.0 parts of antioxidant, 0.5-1.0 parts of initiator and 0.1-0.5 parts of dibutyltin dilaurate.

3. The low-temperature silicone grafted amorphous poly-α-olefin hot melt adhesive according to claim 2, characterized in that: The invention is prepared from the following components in parts by mass: 40-60 parts of amorphous poly-alpha olefin, 10-20 parts of low molecular weight polyisobutylene, 40-50 parts of C5 resin, 1-5 parts of vinyltrimethoxysilane, 0.5-1.0 parts of antioxidant, 0.5-1.0 parts of initiator and 0.1-0.5 parts of dibutyltin dilaurate.

4. The low-temperature silicone grafted amorphous poly-α-olefin hot melt adhesive according to any one of claims 1 to 3, characterized in that: The molecular weight of the low molecular weight polyisobutylene is 950-1400.

5. The low-temperature silicone grafted amorphous poly-α-olefin hot melt adhesive according to claim 4, characterized in that: The molecular weight of the low molecular weight polyisobutylene is 1300.

6. The low-temperature silicone grafted amorphous poly-α-olefin hot melt adhesive according to any one of claims 1 to 3, characterized in that: The antioxidant is antioxidant 1010 or antioxidant 3114.

7. The low-temperature silicone grafted amorphous poly-α-olefin hot melt adhesive according to any one of claims 1 to 3, characterized in that: The initiator is tert-butyl peroxypivalate.

8. The method for preparing the low-temperature grafted silicone amorphous poly-α-olefin hot melt adhesive according to any one of claims 1 to 3, characterized in that: The method comprises the following steps: uniformly mixing 10% to 20% of the mass of C5 resin or low molecular weight polyisobutylene with dibutyltin dilaurate; sequentially adding 50% to 70% of the mass of C5 resin or low molecular weight polyisobutylene, an antioxidant, and amorphous polyalphaolefin into a reaction vessel preheated at 100° C. to 120° C.; starting stirring and vacuum degassing; continuously stirring for 1 to 2 hours; and sequentially adding a mixture of C5 resin or low molecular weight polyisobutylene and dibutyltin dilaurate, vinyltrimethoxysilane, and the like into the reaction vessel. , and the remaining C5 resin and low molecular weight polyisobutylene, stir and start vacuum degassing, stir for 0.3 to 0.8 hours, add initiator, stir and start vacuum degassing, continue stirring for 0.3 to 0.8 hours, heat to 130℃ to 150℃ and vacuum remove unreacted vinyltrimethoxysiloxane, continue stirring for 0.5 to 1.5 hours, cool to 100℃ to 110℃, stir and vacuum degass for 0.2 to 0.3 hours to obtain the low-temperature grafted silicone amorphous polyalphaolefin hot melt adhesive.

9. The preparation method according to claim 8, characterized in that The specific steps are as follows: 10% to 20% of the mass of C5 resin or low molecular weight polyisobutylene is evenly mixed with dibutyltin dilaurate, 50% to 70% of the mass of C5 resin or low molecular weight polyisobutylene, an antioxidant, and amorphous polyalphaolefin are sequentially added into a reaction vessel preheated to 115° C., stirring and vacuum degassing are started, and stirring is continued for 1.5 hours. Then, a mixture of C5 resin or low molecular weight polyisobutylene and dibutyltin dilaurate, vinyltrimethoxysilane, and the remaining C5 resin and low molecular weight polyisobutylene are added into the reaction vessel, stirring and vacuum degassing is started, stirring for 0.5 hours, adding an initiator, stirring and vacuum degassing is started, stirring for 0.5 hours, heating to 140° C. to vacuum remove unreacted vinyltrimethoxysiloxane, stirring for 1 hour, cooling to 105° C., stirring and vacuum degassing for 0.25 hours, and obtaining the amorphous polyalphaolefin hot melt adhesive grafted with low-temperature silicone.

10. Use of the low-temperature grafted silicone amorphous poly-α-olefin hot melt adhesive according to any one of claims 1 to 3 in bonding and sealing electronic consumer products and new energy batteries.

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