Hot melt adhesive with high initial adhesion strength and preparation method thereof

Abstract

The invention discloses a hot melt adhesive with high initial adhesion strength and a preparation method thereof, and relates to the technical field of hot melt adhesives, the hot melt adhesive comprises the following raw materials by weight: 50-70 parts of APAO resin; 10 to 20 parts of an ethylene-propylene copolymer; 20 to 30 parts of modified petroleum hydrogenated resin; 10 to 20 parts of phenolic terpene resin; 15 to 25 parts of polyethylene wax; 20 to 40 parts of a styrene-butadiene-styrene block copolymer; 0.5 to 1 part of an antioxidant; the modified petroleum hydrogenated resin is prepared by modifying petroleum hydrogenated resin, tetrahydrofuran, triethylamine, p-hydroxyanisole and acryloyl chloride. The hot melt adhesive has the effect of improving the initial adhesion strength of the hot melt adhesive.

Description

Technical Field

[0001] The invention relates to the field of hot melt adhesives, in particular to a hot melt adhesive with high initial adhesive strength and a preparation method thereof. Background Art

[0002] As a common adhesive, hot melt adhesive products have the advantages of high adhesion, rapid shaping, good coating effect and moisture resistance. They are widely used in hygiene care products, woodworking, paper composites, food box packaging, automobiles (interior, headlights, batteries), filters, carpet laying, road construction, white appliances, mattresses and other fields. It is an adhesive material that has been widely used and studied in recent years.

[0003] However, traditional hot melt adhesives perform poorly in terms of initial adhesion strength and are difficult to meet in certain application scenarios that have high requirements for initial adhesion. Summary of the invention

[0004] In order to improve the initial adhesive strength of a hot melt adhesive, the present application provides a hot melt adhesive with high initial adhesive strength and a preparation method thereof.

[0005] In the first aspect, the present application provides a hot melt adhesive with high initial adhesion strength using the following technical solution: A hot melt adhesive with high initial adhesive strength comprises the following raw materials in parts by weight: 50-70 parts of APAO resin; 10-20 parts of ethylene-propylene copolymer; 20-30 parts of modified petroleum hydrogenated resin; 10-20 parts of phenolic terpene resin; 15-25 parts of polyethylene wax; 20-40 parts of styrene-butadiene-styrene block copolymer; and 0.5-1 part of antioxidant. The modified petroleum hydrogenated resin is prepared by modifying petroleum hydrogenated resin, tetrahydrofuran, triethylamine, p-hydroxyanisole and acryloyl chloride.

[0006] By adopting the above technical scheme, APAO is used as the main component to provide higher bonding performance, polyethylene wax and styrene-butadiene-styrene block copolymer, ethylene-propylene copolymer and phenolic terpene resin all have good bonding performance, polyethylene wax is used as a plasticizer to reduce the melt viscosity and improve the fluidity and wettability of the hot melt adhesive, and the modification of petroleum hydrogenated resin by p-hydroxyanisole and acryloyl chloride can not only improve the wettability of the hot melt adhesive, but also can produce a hot melt adhesive with high initial adhesion strength, so that the hot melt adhesive has good adhesion and durability.

[0007] Preferably, the preparation method of the modified petroleum hydrogenated resin is: 10-30 parts by weight of petroleum hydrogenated resin, 20-40 parts by weight of tetrahydrofuran, and 5-15 parts by weight of triethylamine are mixed and heated, and then 1-3 parts by weight of p-hydroxyanisole and 2-10 parts by weight of acryloyl chloride are added and heated for reaction, and then extracted and rotary evaporated to obtain the modified petroleum hydrogenated resin.

[0008] By adopting the above technical scheme, the present application modifies the petroleum hydrogenated resin. P-hydroxyanisole contains phenolic hydroxyl groups, acryloyl chloride contains active chlorine atoms, tetrahydrofuran is used as a solvent, and triethylamine is used as an acid binding agent to promote the reaction of acryloyl chloride and p-hydroxyanisole. The petroleum hydrogenated resin contains double bonds and reacts with p-hydroxyanisole, thereby improving the initial adhesion strength and mechanical properties of the hot melt adhesive.

[0009] Preferably, the acid value of the petroleum hydrogenated resin is ≤0.1 mgKOH / g.

[0010] By adopting the above technical solution, petroleum hydrogenated resin is used as a tackifier in the components. Selecting a suitable acid value can help improve the bonding strength and lasting adhesion of the hot melt adhesive, so that the hot melt adhesive can maintain good thermal stability at high temperatures. The petroleum hydrogenated resin is not easy to decompose during the preparation and storage of the hot melt adhesive, thereby improving the quality and performance of the hot melt adhesive.

[0011] Preferably, the weight ratio of the petroleum hydrogenated resin, p-hydroxyanisole and acryloyl chloride is 1:(0.06-0.09):(0.35-0.4).

[0012] By adopting the above technical scheme, when the petroleum hydrogenated resin, p-hydroxyanisole and acryloyl chloride are in a specific weight ratio, the acyl chloride in acryloyl chloride reacts with the hydroxyl group of p-hydroxyanisole to form an ester, thereby improving the initial adhesion strength and mechanical properties of the hot melt adhesive.

[0013] Preferably, the ethylene-propylene copolymer is a modified ethylene-propylene copolymer, and the preparation method of the modified ethylene-propylene copolymer is: 30-50 parts by weight of ethylene-propylene copolymer, 20-40 parts by weight of cyclohexane oil, 10-20 parts by weight of polypropylene, 5-10 parts by weight of expandable graphite and 1-5 parts by weight of nano iron oxide are mixed and stirred, and the modified ethylene-propylene copolymer is obtained after melt granulation.

[0014] By adopting the above technical scheme, the viscosity of the ethylene-propylene copolymer is relatively high, which helps to improve the initial adhesion strength of the hot melt adhesive. The present application adds nano-iron oxide intercalated expanded graphite to the ethylene-propylene copolymer, so that the expanded graphite plays a stress-bearing role inside the ethylene-propylene copolymer, effectively improves the tensile properties of the ethylene-propylene copolymer, and further improves the tensile properties of the hot melt adhesive.

[0015] Preferably, the weight ratio of the ethylene-propylene copolymer, polypropylene, expandable graphite and nano-iron oxide is (4.2-4.8):1:(0.56-0.64):(0.36-0.4).

[0016] By adopting the above technical solution, when ethylene-propylene copolymer, polypropylene, expandable graphite and nano iron oxide are in a specific weight ratio, the four work together to produce a synergistic effect. Nano iron oxide can improve the thermal stability of the hot melt adhesive, reduce the degradation of the hot melt adhesive at high temperature, and improve the mechanical strength of the hot melt adhesive.

[0017] Preferably, the weight ratio of the APAO resin, the modified ethylene-propylene copolymer, the modified petroleum hydrogenated resin and the phenolic terpene resin is (6.4-6.6):(1.2-1.5):(2.5-2.8):1.

[0018] By adopting the above technical scheme, when APAO resin, modified ethylene-propylene copolymer, modified petroleum hydrogenated resin and phenolic terpene resin are in a specific weight ratio, the four work together to produce a synergistic effect. The terpene phenolic resin has good adhesion, which makes the various resins in the components have good compatibility, further improves the chemical stability and thermal stability of the hot melt adhesive, and greatly improves the initial adhesion and corrosion resistance of the hot melt adhesive.

[0019] Preferably, the antioxidant includes one of antioxidant 1010 and antioxidant 168 .

[0020] By adopting the above technical solution and selecting a suitable antioxidant, the oxidation resistance of the hot melt adhesive can be improved, so that the hot melt adhesive is less likely to oxidize and turn yellow or reduce viscosity.

[0021] Preferably, the softening point of the APAO resin is 150-160°C.

[0022] By adopting the above technical solution and selecting APAO resin with a suitable softening point as the base resin, it is helpful to improve the thermal stability of the hot melt adhesive, thereby maintaining the hot melt adhesive with good bonding properties.

[0023] In the second aspect, the present application provides a method for preparing a hot melt adhesive with high initial adhesion strength, which adopts the following technical scheme: a method for preparing a hot melt adhesive with high initial adhesion strength, comprising the following steps: heating and mixing polyethylene wax, an antioxidant and part of APAO resin, and then adding another part of APAO resin, ethylene-propylene copolymer and styrene-butadiene-styrene block copolymer to mix and stir; cooling, adding modified petroleum hydrogenated resin and phenolic terpene resin and continuing to stir; extruding after vacuum exhaust, traction cooling and then cutting and drying to obtain the hot melt adhesive with high initial adhesion strength.

[0024] By adopting the above technical solution, the components are mixed and then extruded into hot melt adhesive. The preparation method of the present application is simple and is conducive to mass production of hot melt adhesive with high initial adhesive strength.

[0025] In summary, this application has the following beneficial technical effects: 1. APAO, as the main component, provides higher bonding performance. Polyethylene wax, styrene-butadiene-styrene block copolymer, ethylene-propylene copolymer and phenolic terpene resin all have good bonding performance. Polyethylene wax as a plasticizer reduces melt viscosity and improves the fluidity and wettability of hot melt adhesive. The modification of petroleum hydrogenated resin by p-hydroxyanisole and acryloyl chloride can not only improve the wettability of hot melt adhesive, but also produce hot melt adhesive with high initial adhesive strength, so that the hot melt adhesive has good adhesion and durability; 2. The present application modifies petroleum hydrogenated resin. p-Hydroxyanisole contains phenolic hydroxyl groups, acryloyl chloride contains active chlorine atoms, tetrahydrofuran is used as a solvent, and triethylamine is used as an acid binding agent to promote the reaction of acryloyl chloride and p-Hydroxyanisole. The petroleum hydrogenated resin contains double bonds and reacts with p-Hydroxyanisole, thereby improving the initial adhesion strength and mechanical properties of the hot melt adhesive. DETAILED DESCRIPTION

[0026] The present application is further described in detail below in conjunction with embodiments and comparative examples. Example

[0027] Example 1 A method for preparing a hot melt adhesive with high initial adhesive strength: 15g polyethylene wax, 0.5g antioxidant and 20% APAO resin (10g) are heated and mixed at 160°C for 10min, and then 10g ethylene-propylene copolymer, 20g styrene-butadiene-styrene block copolymer and the remaining 80% APAO resin (40g) are added and mixed and stirred for 20min; cooled to 140°C, and then 20g modified petroleum hydrogenated resin and 10g phenolic terpene resin are added and stirred for 30min; vacuum exhaust treatment is carried out under a vacuum degree of -0.1MPa, and then extruded through an extruder, quickly pulled to a circulating cooling water tank at a temperature of 5°C for cooling, and then cut and dried at a temperature of 80°C to obtain a hot melt adhesive with high initial adhesion strength.

[0028] The antioxidant is antioxidant 1010, the petroleum hydrogenated resin is C5 hydrogenated petroleum resin H5-1001, the softening point of this brand of C5 hydrogenated petroleum resin is 100°C, and the acid value is ≤0.1mgKOH / g; the APAO resin is specifically Evonik APAO888, and the softening point of this brand of APAO resin is 160°C; the phenolic terpene resin is selected from Guangzhou Liben Rubber Raw Materials Trading Co., Ltd., model Arakawa 803L; the polyethylene wax is Japan Mitsui 1105A; the styrene-butadiene-styrene block copolymer is Maoming Petrochemical F875.

[0029] The preparation method of the modified petroleum hydrogenated resin is as follows: 10g of petroleum hydrogenated resin, 20g of tetrahydrofuran and 5g of triethylamine are mixed, heated to 40°C and reacted for 5h, 1g of p-hydroxyanisole and 2g of acryloyl chloride are added, heated to 80°C and reacted for 2h, the filtrate is filtered and then rotary evaporated, extracted with dichloromethane and then rotary evaporated to obtain the modified petroleum hydrogenated resin.

[0030] Example 2 A method for preparing a hot melt adhesive with high initial adhesive strength: Polyethylene wax, antioxidant and 20% APAO resin are heated and mixed at 160°C for 10 minutes, and then ethylene-propylene copolymer, styrene-butadiene-styrene block copolymer and the remaining 80% APAO resin are added and mixed and stirred for 20 minutes; cooled to 140°C, and then modified petroleum hydrogenated resin and phenolic terpene resin are added and stirred for 30 minutes; vacuum exhaust treatment is carried out under a vacuum degree of -0.1MPa, and then extruded through an extruder, quickly pulled to a circulating cooling water tank at a temperature of 5°C for cooling, and then cut and dried at a temperature of 80°C to obtain a hot melt adhesive with high initial adhesion strength.

[0031] The antioxidant is antioxidant 168, the petroleum hydrogenated resin is C5 hydrogenated petroleum resin H5-1001, the softening point of this brand of C5 hydrogenated petroleum resin is 100°C, and the acid value is ≤0.1mgKOH / g; the APAO resin is specifically Evonik APAO888, and the softening point of this brand of APAO resin is 160°C; the phenolic terpene resin is selected from Guangzhou Liben Rubber Raw Materials Trading Co., Ltd., model Arakawa 803L; the polyethylene wax is Japan Mitsui 1105A; the styrene-butadiene-styrene block copolymer is Maoming Petrochemical F875.

[0032] The preparation method of the modified petroleum hydrogenated resin is as follows: 10g of petroleum hydrogenated resin, 20g of tetrahydrofuran and 5g of triethylamine are mixed, heated to 40°C and reacted for 5h, 1g of p-hydroxyanisole and 2g of acryloyl chloride are added, heated to 80°C and reacted for 2h, the filtrate is filtered and then rotary evaporated, extracted with dichloromethane and then rotary evaporated to obtain the modified petroleum hydrogenated resin.

[0033] Example 3 A method for preparing a hot melt adhesive with high initial adhesive strength: Polyethylene wax, antioxidant and 20% APAO resin are heated and mixed at 160°C for 10 minutes, and then ethylene-propylene copolymer, styrene-butadiene-styrene block copolymer and the remaining 80% APAO resin are added and mixed and stirred for 20 minutes; cooled to 140°C, and then modified petroleum hydrogenated resin and phenolic terpene resin are added and stirred for 30 minutes; vacuum exhaust treatment is carried out under a vacuum degree of -0.1MPa, and then extruded through an extruder, quickly pulled to a circulating cooling water tank at a temperature of 5°C for cooling, and then cut and dried at a temperature of 80°C to obtain a hot melt adhesive with high initial adhesion strength.

[0034] The antioxidant is antioxidant 1010, the petroleum hydrogenated resin is C5 hydrogenated petroleum resin H5-1001, the softening point of this brand of C5 hydrogenated petroleum resin is 100°C, and the acid value is ≤0.1mgKOH / g; the APAO resin is specifically Evonik APAO888, and the softening point of this brand of APAO resin is 160°C; the phenolic terpene resin is selected from Guangzhou Liben Rubber Raw Materials Trading Co., Ltd., model Arakawa 803L; the polyethylene wax is Japan Mitsui 1105A; the styrene-butadiene-styrene block copolymer is Maoming Petrochemical F875.

[0035] The preparation method of the modified petroleum hydrogenated resin is as follows: 10g of petroleum hydrogenated resin, 20g of tetrahydrofuran and 5g of triethylamine are mixed, heated to 40°C and reacted for 5h, 1g of p-hydroxyanisole and 2g of acryloyl chloride are added, heated to 80°C and reacted for 2h, the filtrate is filtered and then rotary evaporated, extracted with dichloromethane and then rotary evaporated to obtain the modified petroleum hydrogenated resin.

[0036] Example 4 A method for preparing a hot melt adhesive with high initial adhesive strength, which is different from Example 3 in that: the preparation method of a modified petroleum hydrogenated resin is as follows: 30g of petroleum hydrogenated resin, 40g of tetrahydrofuran, and 15g of triethylamine are mixed, heated to 40°C, and reacted for 5h, then 3g of p-hydroxyanisole and 10g of acryloyl chloride are added, heated to 80°C, and reacted for 2h, and after filtering, the filtrate is rotary evaporated, extracted with dichloromethane, and then rotary evaporated to obtain a modified petroleum hydrogenated resin.

[0037] Example 5 A method for preparing a hot melt adhesive with high initial adhesive strength is different from that of Example 3 in that: in the process of preparing the modified petroleum hydrogenated resin, the petroleum hydrogenated resin is SUKOREZ SU-100 with an acid value of 7.5 mgKOH / g.

[0038] Example 6 A method for preparing a hot melt adhesive with high initial adhesion strength, which is different from Example 3 in that: the input amount of petroleum hydrogenated resin is 20g, the input amount of p-hydroxyanisole is 1.2g, and the input amount of acryloyl chloride is 7g.

[0039] Example 7 A method for preparing a hot melt adhesive with high initial adhesion strength, which is different from Example 3 in that: the input amount of petroleum hydrogenated resin is 20g, the input amount of p-hydroxyanisole is 1.8g, and the input amount of acryloyl chloride is 8g.

[0040] Example 8 A method for preparing a hot melt adhesive with high initial adhesion strength, which is different from Example 6 in that an equal amount of ethylene-propylene copolymer is replaced by a modified ethylene-propylene copolymer, and the preparation method of the modified ethylene-propylene copolymer is as follows: 30g of ethylene-propylene copolymer, 20g of cyclohexane oil, 10g of polypropylene, 5g of expandable graphite and 1g of nano-iron oxide are mixed and stirred in a high-speed mixer at a temperature of 60°C for 5 minutes, and then added into a twin-screw extruder and melt-granulated at a screw speed of 100r / min and a temperature of 160°C to obtain a modified ethylene-propylene copolymer.

[0041] Example 9 A method for preparing a hot melt adhesive with high initial adhesion strength, which is different from Example 6 in that an equal amount of ethylene-propylene copolymer is replaced by a modified ethylene-propylene copolymer, and the preparation method of the modified ethylene-propylene copolymer is as follows: 50g of ethylene-propylene copolymer, 40g of cyclohexane oil, 20g of polypropylene, 10g of expandable graphite and 5g of nano-iron oxide are mixed and stirred in a high-speed mixer at a temperature of 60°C for 5 minutes, and then added into a twin-screw extruder and melt-granulated at a screw speed of 100r / min and a temperature of 160°C to obtain a modified ethylene-propylene copolymer.

[0042] Example 10 A method for preparing a hot melt adhesive with high initial adhesion strength, which is different from Example 9 in that: the input amount of ethylene-propylene copolymer is 42g, the input amount of polypropylene is 10g, the input amount of expandable graphite is 5.6g, and the input amount of nano-iron oxide is 3.6g.

[0043] Embodiment 11 A method for preparing a hot melt adhesive with high initial adhesion strength, which is different from Example 9 in that: the input amount of ethylene-propylene copolymer is 48g, the input amount of polypropylene is 10g, the input amount of expandable graphite is 6.4g, and the input amount of nano-iron oxide is 4g.

[0044] Example 12 A method for preparing a hot melt adhesive with high initial adhesion strength, which is different from Example 11 in that: the input amount of APAO resin is 64g, the input amount of modified ethylene-propylene copolymer is 12g, the input amount of modified petroleum hydrogenated resin is 25g, and the input amount of phenolic terpene resin is 10g.

[0045] Example 13 A method for preparing a hot melt adhesive with high initial adhesion strength, which is different from Example 11 in that: the input amount of APAO resin is 66g, the input amount of modified ethylene-propylene copolymer is 15g, the input amount of modified petroleum hydrogenated resin is 28g, and the input amount of phenolic terpene resin is 10g.

[0046] Comparative Example 1 A method for preparing a hot melt adhesive with high initial adhesive strength, which is different from Example 3 in that: an equal amount of modified petroleum hydrogenated resin is replaced by petroleum hydrogenated resin, and C5 hydrogenated petroleum resin H5-1001 is selected. The softening point of this grade of C5 hydrogenated petroleum resin is 100°C and the acid value is ≤0.1mgKOH / g.

[0047] Comparative Example 2 A method for preparing a hot melt adhesive with high initial adhesive strength, which is different from Example 3 in that an equal amount of modified petroleum hydrogenated resin is replaced with a petroleum hydrogenated resin selected from Kolon SUKOREZ SU-100, whose acid value is 7.5 mgKOH / g.

[0048] Comparative Example 3 A method for preparing a hot melt adhesive with high initial adhesion strength, which is different from Example 3 in that an equal amount of ethylene-propylene copolymer is replaced by a styrene-butadiene-styrene block copolymer.

[0049] Comparative Example 4 A method for preparing a hot melt adhesive with high initial adhesion strength, which is different from Example 3 in that an equal amount of phenolic terpene resin is replaced by an aqueous polyurethane resin selected from Anhui Dawei Huatai New Material Technology Co., Ltd., AH-1702, with a solid content of 35%.

[0050] Comparative Example 5 A method for preparing a hot melt adhesive with high initial adhesion strength, which is different from Example 3 in that an equal amount of styrene-butadiene-styrene block copolymer is replaced with thermoplastic styrene-butadiene rubber, selected from Jinan Jiahua Chemical Technology Co., Ltd., with the product number JH-0586.

[0051] Performance testing: Initial adhesion strength test: refer to GB / T 7124-2008 Determination of tensile shear strength of adhesives for testing, cure for 1 minute in an environment of temperature and humidity of 25±1℃ / 50±5%RH, and pull-out test at 100mm / min.

[0052] Softening point test (melting temperature): refer to "GB / T 15332-1994 Hot Melt Adhesive Softening Point Ring and Ball Method" for testing, and record the lowest temperature (℃) when the softening state is reached. Among them, silicone oil is used as the heating medium.

[0053] Corrosion resistance: The hot melt adhesives prepared in Examples 1-13 and Comparative Examples 1-5 were bonded to a substrate, placed under 5% NaOH / 25°C for 5 hours, and tested for peeling. The substrate was a PET board.

[0054] According to the data comparison of Examples 1-3 and Comparative Examples 1-5, APAO, as the main component, provides higher bonding performance, polyethylene wax and styrene-butadiene-styrene block copolymer, ethylene-propylene copolymer and phenolic terpene resin all have good bonding performance, polyethylene wax as a plasticizer reduces the melt viscosity, improves the fluidity and wettability of the hot melt adhesive, and the modification of petroleum hydrogenated resin by p-hydroxyanisole and acryloyl chloride can not only improve the wettability of the hot melt adhesive, but also can produce a hot melt adhesive with high initial adhesion strength, so that the hot melt adhesive has good adhesion and durability.

[0055] According to the data comparison of Examples 3-5, it can be obtained that the petroleum hydrogenated resin is used as a tackifier in the components. Selecting a suitable acid value can help improve the bonding strength and lasting adhesion of the hot melt adhesive, so that the hot melt adhesive can maintain good thermal stability at high temperatures. The petroleum hydrogenated resin is not easy to decompose during the preparation and storage of the hot melt adhesive, thereby improving the quality and performance of the hot melt adhesive.

[0056] According to the data comparison of Example 3 and Examples 6-7, when the petroleum hydrogenated resin, p-hydroxyanisole and acryloyl chloride are in a specific weight ratio, the acyl chloride in acryloyl chloride reacts with the hydroxyl group of p-hydroxyanisole to form an ester, thereby improving the initial adhesion strength and mechanical properties of the hot melt adhesive.

[0057] According to the data comparison between Example 6 and Examples 8-9, it can be obtained that the viscosity of ethylene-propylene copolymer is relatively high, which helps to improve the initial adhesion strength of the hot melt adhesive. The present application adds nano-iron oxide intercalated expanded graphite to the ethylene-propylene copolymer, so that the expanded graphite plays a stress bearing role inside the ethylene-propylene copolymer, effectively improves the tensile properties of the ethylene-propylene copolymer, and further improves the tensile properties of the hot melt adhesive.

[0058] According to the data comparison of Example 8 and Examples 10-11, it can be obtained that when ethylene-propylene copolymer, polypropylene, expandable graphite and nano iron oxide are in a specific weight ratio, the four work together to produce a synergistic effect. Nano iron oxide can improve the thermal stability of the hot melt adhesive, reduce the degradation of the hot melt adhesive at high temperature, and improve the mechanical strength of the hot melt adhesive.

[0059] According to the data comparison of Examples 11-13, when APAO resin, modified ethylene-propylene copolymer, modified petroleum hydrogenated resin and phenolic terpene resin are in a specific weight ratio, the four work together to produce a synergistic effect. The terpene phenolic resin has good adhesion, which makes the various resins in the components have good compatibility, further improves the chemical stability and thermal stability of the hot melt adhesive, and greatly improves the initial adhesion and corrosion resistance of the hot melt adhesive.

[0060] This specific implementation manner is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the specific implementation manner as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A hot melt adhesive with high initial adhesive strength, characterized in that: The invention comprises the following raw materials in parts by weight: 50-70 parts of APAO resin; 10-20 parts of ethylene-propylene copolymer; 20-30 parts of modified petroleum hydrogenated resin; 10-20 parts of phenolic terpene resin; 15-25 parts of polyethylene wax; 20-40 parts of styrene-butadiene-styrene block copolymer; and 0.5-1 part of antioxidant. The modified petroleum hydrogenated resin is prepared by modifying petroleum hydrogenated resin, tetrahydrofuran, triethylamine, p-hydroxyanisole and acryloyl chloride.

2. A hot melt adhesive with high initial adhesion strength according to claim 1, characterized in that: The preparation method of the modified petroleum hydrogenated resin comprises: mixing and heating 10-30 parts by weight of petroleum hydrogenated resin, 20-40 parts by weight of tetrahydrofuran and 5-15 parts by weight of triethylamine, then adding 1-3 parts by weight of p-hydroxyanisole and 2-10 parts by weight of acryloyl chloride, heating and reacting, extracting and then rotary evaporating to obtain the modified petroleum hydrogenated resin.

3. The hot melt adhesive with high initial adhesion strength according to claim 1, characterized in that: The acid value of the petroleum hydrogenated resin is ≤0.1 mgKOH / g.

4. The hot melt adhesive with high initial adhesive strength according to claim 2, characterized in that: The weight ratio of the petroleum hydrogenated resin, p-hydroxyanisole and acryloyl chloride is 1: (0.06-0.09): (0.35-0.4).

5. The hot melt adhesive with high initial adhesion strength according to claim 1, characterized in that: The ethylene-propylene copolymer is a modified ethylene-propylene copolymer. The preparation method of the modified ethylene-propylene copolymer is as follows: 30-50 parts by weight of ethylene-propylene copolymer, 20-40 parts by weight of cyclohexane oil, 10-20 parts by weight of polypropylene, 5-10 parts by weight of expandable graphite and 1-5 parts by weight of nano iron oxide are mixed and stirred, and the modified ethylene-propylene copolymer is obtained after melt granulation.

6. The hot melt adhesive with high initial adhesion strength according to claim 5, characterized in that: The weight ratio of the ethylene-propylene copolymer, polypropylene, expandable graphite and nano iron oxide is (4.2-4.8):1:(0.56-0.64):(0.36-0.4).

7. The hot melt adhesive with high initial adhesion strength according to claim 5, characterized in that: The weight ratio of the APAO resin, the modified ethylene-propylene copolymer, the modified petroleum hydrogenated resin and the phenolic terpene resin is (6.4-6.6): (1.2-1.5): (2.5-2.8):

1.

8. The hot melt adhesive with high initial adhesion strength according to claim 1, characterized in that: The antioxidant includes one of the antioxidant 1010 and the antioxidant 168 .

9. The hot melt adhesive with high initial adhesion strength according to claim 1, characterized in that: The softening point of the APAO resin is 150-160°C.

10. A method for preparing a hot melt adhesive with high initial adhesive strength, characterized in that: The method for preparing the hot melt adhesive with high initial adhesive strength as claimed in any one of claims 1 to 9 comprises the following steps: heating and mixing polyethylene wax, an antioxidant and a part of APAO resin, and then adding another part of APAO resin, ethylene-propylene copolymer and styrene-butadiene-styrene block copolymer, mixing and stirring; cooling, adding modified petroleum hydrogenated resin and phenolic terpene resin and continuing to stir; extruding after vacuum exhaust, traction cooling, cutting and drying after drying to obtain the hot melt adhesive with high initial adhesive strength.

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