A hot melt adhesive for rubber systems containing a polyolefin and a wax and a process for its preparation

Abstract

The present application relates to the technical field of adhesive, and provides a hot melt adhesive containing polyolefin and wax and a preparation method thereof, which comprises the following components in parts by weight: naphthenic oil 0-15 parts by weight, white oil 0-10 parts by weight, SBS rubber 5-20 parts by weight, SIS rubber 5-25 parts by weight, amorphous polyolefin elastomer (APAO) 0-15 parts by weight, polypropylene (PP) 0-10 parts by weight, wax 0-10 parts by weight, hydrogenated petroleum resin 15-55 parts by weight, rosin resin 1-10 parts by weight, and antioxidant 0.01-1 parts by weight. The present application solves the problems of poor bonding effect and poor low-temperature resistance of most hot melt adhesives on the market on materials such as kraft paper, copper plate paper, corrugated paper, laminated packaging paper, non-woven fabric and cotton fabric.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of adhesives, in particular to a rubber system hot melt adhesive containing polyolefin and wax and a preparation method thereof. BACKGROUND

[0002] Hot melt adhesive is a new type of adhesive, which is a synthetic resin mainly composed of thermoplastic elastomer. When it encounters high temperature (100-200℃), it begins to melt into liquid. When it returns to normal temperature, it returns to solid. This glue does not contain any solvent, is non-toxic, fast-drying, has simple production process, low cost, less equipment investment for customers, is easy to use, has high production efficiency, and is widely used in food packaging and furniture industries.

[0003] Due to environmental protection requirements, more and more food packaging is changed from plastic packaging to paper packaging, including copper plate paper, kraft paper, corrugated paper, and laminated packaging paper. The EVA system hot melt adhesive originally used in the industry is short of upstream EVA material, and the price fluctuates sharply, resulting in gradually rising cost and lack of competitiveness. In addition, the EVA system hot melt adhesive has poor adhesion effect with laminated materials, and has poor low-temperature adhesion performance with various materials such as kraft paper, copper plate paper, corrugated paper, laminated packaging paper, non-woven fabric, and cotton fabric. SUMMARY

[0004] (I) Technical problems solved

[0005] In view of the deficiencies of the existing hot melt adhesive technology, the present application provides a rubber system hot melt adhesive containing polyolefin and wax and a preparation method thereof. The production process of the present application does not emit harmful substances, does not use any solvent, belongs to environmentally friendly adhesive, has simple operation process and less equipment investment during production, and the hot melt adhesive prepared by the present application has low odor characteristics, good adhesion performance with kraft paper, copper plate paper, corrugated paper, laminated packaging paper, non-woven fabric, cotton fabric and other materials, and high adhesion strength, good high and low temperature resistance and good aging resistance.

[0006] (II) Technical solutions

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions: a rubber system hot melt adhesive containing polyolefin and wax, comprising the following components by weight: naphthenic oil 0-15 parts by weight, white oil 0-10 parts by weight, SBS rubber 5-20 parts by weight, SIS rubber 5-25 parts by weight, amorphous polyolefin elastomer (APAO) 0-15 parts by weight, polypropylene (PP) 0-10 parts by weight, wax 0-10 parts by weight, hydrogenated petroleum resin 15-55 parts by weight, rosin resin 1-10 parts by weight, and antioxidant 0.01-1 parts by weight.

[0008] Specifically, the following weight parts of each component are included: naphthenic oil 5 parts by weight, white oil 5 parts by weight, styrene-butadiene-styrene (SBS) rubber 10 parts by weight, styrene-isoprene-styrene (SIS) rubber 10 parts by weight, amorphous polyolefin elastomer (APAO) 10 parts by weight, polypropylene (PP) 5 parts by weight, wax 6 parts by weight, hydrogenated petroleum resin 43.5 parts by weight, rosin resin 5 parts by weight, antioxidant 0.5 parts by weight.

[0009] Specifically, the hydrogenated petroleum resin is one or both of hydrogenated carbon five petroleum resin and hydrogenated carbon nine petroleum resin.

[0010] Specifically, the SBS rubber is one or several of SBS rubbers with different styrene contents, and the SIS rubber is one or several of SIS rubbers with different di-block contents.

[0011] Specifically, the amorphous polyolefin (APAO) is one or several of polyolefins rich in ethylene, rich in propylene, and rich in butene.

[0012] Specifically, the wax is one or several of paraffin wax, microcrystalline wax, and polyethylene wax.

[0013] Specifically, the antioxidant is one or a mixture of both of 816G or 6011.

[0014] The preparation method of the above-mentioned hot melt adhesive of a rubber system containing polyolefin and wax includes the following steps:

[0015] 1) Naphthenic oil 0-15 parts by weight, white oil 0-10 parts by weight, SBS rubber 5-20 parts by weight, SIS rubber 5-25 parts by weight, and antioxidant 0.01-1 parts by weight are put into a reaction kettle, heating is started, and stirring is uniform, the stirring speed is controlled at 30-50 HZ, the reaction kettle is closed, and vacuum is extracted during stirring to prevent the rubber from being oxidized and cracked to affect the bonding performance of the adhesive;

[0016] 2) Amorphous polyolefin elastomer (APAO) 0-20 parts by weight and polypropylene (PP) 0-10 are put into the reaction kettle after step 1) is completed, and stirring is uniform, the stirring speed is controlled at 30-50 HZ, the reaction kettle is closed, and vacuum is extracted during stirring;

[0017] 3) Wax 0-10 parts by weight is put into the reaction kettle after step 2) is completed, and stirring is uniform, the stirring speed is controlled at 30-50 HZ, the reaction kettle is closed, and vacuum is extracted during stirring;

[0018] 4) In the reactor of step 3), hydrogenated petroleum resin 15-55 parts by weight, rosin resin 1-10 parts by weight, and stirring is uniform, stirring speed control at 30-50HZ, closed reactor, stirring process, vacuum, vacuum time control in 40-60min, vacuum time end put vacuum, get hot melt adhesive crude material;

[0019] 5), the hot melt packaging glue crude material obtained in step 4) is discharged by a three-bag filter with a mesh size of 100-200, thereby obtaining a rubber system hot melt adhesive product containing polyolefin and wax.

[0020] Specifically, in step 1), the temperature of the material in the reactor is controlled at 165-180℃, and heated for 50-80min until the material is completely melted.

[0021] Specifically, in the reactor of step 1) to step 4), the pressure after vacuum extraction is less than-0.09Mpa.

[0022] (Three) beneficial effects

[0023] The present application provides a rubber system hot melt adhesive containing polyolefin and wax and a preparation method thereof, which has the following beneficial effects:

[0024] The application has simple preparation method, no harmful substance emission in production process, no solvent used, belongs to environment-friendly adhesive, has simple operation process and less equipment investment in production, introduces hydrogenated petroleum resin, rosin resin, amorphous polyolefin (APAO), polypropylene (PP), antioxidant and other materials in the existing rubber system adhesive, thereby the rubber system hot melt adhesive with higher bonding performance, high and low temperature resistance and aging resistance than general EVA system adhesive is prepared, the introduction of hydrogenated petroleum resin and rosin resin greatly enhances the shear strength and tensile strength of the hot melt adhesive, the introduction of rosin resin provides certain polarity, that is, improves the adhesion to materials, and after being mixed with hydrogenated petroleum resin and antioxidant, the bonding performance, high and low temperature resistance and aging resistance are further improved, the introduction of amorphous polyolefin (APAO) enables the hot melt adhesive to be freely adjusted according to different high and low temperature resistance requirements, the introduction of polypropylene (PP) cooperatively effectively improves the shear strength, and the cooperation of hydrogenated petroleum resin, rosin resin, amorphous polyolefin (APAO), polypropylene (PP), SBS rubber and SIS rubber effectively improves the bonding performance, and the hot melt adhesive has better bonding effect on kraft paper, copper plate paper, corrugated paper, laminated packaging paper, non-woven fabric, cotton fabric and other materials.By further design, the high-temperature resistance of the hot melt adhesive can be adjusted by selecting different softening points of the amorphous polyolefin (APAO), the higher the softening point of the amorphous polyolefin (APAO), the better the high-temperature resistance, the low-temperature resistance of the hot melt adhesive can be adjusted by adjusting the amount of the amorphous polyolefin (APAO) within the appropriate range, the higher the content of the amorphous polyolefin (APAO), the better the low-temperature resistance; the shear strength can be effectively enhanced by appropriately increasing the content of the polypropylene (PP); the SBS rubber is one or several of SBS rubbers with different styrene contents, and the SIS rubber is one or several of SIS rubbers with different di-block contents, the higher the content of the SBS rubber within the effective use range, the greater the cohesion of the adhesive, the higher the content of the SIS rubber within the effective use range, the better the low-temperature effect of the adhesive, the higher the styrene content in the SBS rubber, the harder the adhesive, the better the cohesion, the higher the di-block content in the SIS rubber, the better the low-temperature viscosity of the adhesive, and a larger peeling strength can be obtained after mixing, which effectively improves the bonding effect of the adhesive on kraft paper, copper plate paper, corrugated paper, laminated packaging paper, non-woven fabric, cotton fabric and the like, the greater the total rubber content, the higher the viscosity of the adhesive, the better the cohesion of the adhesive, and the better the bonding effect on the substrate; the naphthenic base oil and the white oil can be added in one or two, and the addition is based on the hardness requirement of the hot melt adhesive, when the total amount of the two is fixed, the higher the content of the white oil, the softer the adhesive, and the more the total amount of the two, the softer the adhesive; the higher the content of the polyethylene wax in the formula, the shorter the open time (i.e. the operable time) and the curing time, the higher the content of the paraffin wax, the longer the open time and the curing time, different open times and curing times can be obtained by adjusting the addition amount of different types of wax to meet the requirements of various bonding substrates, the softening point of the paraffin wax is the lowest, the softening point of the microcrystalline wax is in the middle, and the softening point of the polyethylene wax is the highest; both 816G and 6011 belong to mixed antioxidants, and the effect of using a first antioxidant and a second antioxidant together can be obtained by using them alone, which has excellent aging resistance and can effectively prevent rubber cracking and resin yellowing during production, so that the product still has a lighter color and better aging resistance after a long time at high temperature, and in the preparation method, the hot melt packaging adhesive coarse material is discharged through a three-bag filter with a mesh size of 100-200, and the mesh size of the filter bag is selected according to the different viscosity of the hot melt adhesive finished product. DETAILED DESCRIPTION

[0025] All other embodiments obtained by a person of ordinary skill in the art without making creative efforts based on the embodiments in the present application belong to the scope of protection of the present application.

[0026] Example 1:

[0027] A hot melt adhesive of rubber system containing polyolefin and wax, comprising the following components by weight: naphthenic oil 5 parts by weight, white oil 5 parts by weight, styrene-butadiene-styrene (SBS) rubber 10 parts by weight, styrene-isoprene-styrene (SIS) rubber 10 parts by weight, amorphous polyolefin elastomer (APAO) 10 parts by weight, polypropylene (PP) 5 parts by weight, wax 6 parts by weight, hydrogenated petroleum resin 43.5 parts by weight, rosin resin 5 parts by weight, antioxidant 0.5 parts by weight.

[0028] The preparation method of the above-mentioned hot melt adhesive of rubber system containing polyolefin and wax, comprising the following steps:

[0029] 1) naphthenic oil 5 parts by weight, white oil 5 parts by weight, styrene-butadiene-styrene (SBS) rubber 10 parts by weight, styrene-isoprene-styrene (SIS) rubber 10 parts by weight, antioxidant 0.5 parts by weight, are put into a reaction kettle, heating and stirring uniformly, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, vacuumizing during stirring to prevent the rubber from being oxidized and cracked to affect the adhesive bonding performance;

[0030] 2) amorphous polyolefin elastomer (APAO) 10 parts by weight, polypropylene (PP) 5 parts by weight are put into the reaction kettle after step 1) is completed, and stirred uniformly, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, vacuumizing during stirring;

[0031] 3) wax 6 parts by weight is put into the reaction kettle after step 2) is completed, and stirred uniformly, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, vacuumizing during stirring;

[0032] 4) petroleum resin 43.5 parts by weight, rosin resin 5 parts by weight are put into the reaction kettle after step 3) is completed, and stirred uniformly, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, vacuumizing during stirring, the vacuumizing time is controlled at 40-60min, the vacuumizing time is ended, and the hot melt adhesive crude material is obtained after vacuumizing;

[0033] 5) the hot melt adhesive crude material obtained after step 4) is discharged by a three-bag filter with a mesh size of 100-200, (the mesh size of the filter bag is selected according to the viscosity of the obtained hot melt adhesive product), and a hot melt adhesive product of rubber system containing polyolefin and wax is obtained.

[0034] The performance of the hot melt adhesive product of rubber system containing polyolefin and wax prepared in Example 1 is shown in Table 1.

[0035] Example 2:

[0036] A hot melt adhesive of rubber system containing polyolefin and wax, comprising the following components in parts by weight: naphthenic oil 3 parts by weight, white oil 7 parts by weight, styrene-butadiene-styrene (SBS) rubber 6 parts by weight, styrene-isoprene-styrene (SIS) rubber 15 parts by weight, amorphous polyolefin elastomer (APAO) 12 parts by weight, polypropylene (PP) 3 parts by weight, wax 4 parts by weight, hydrogenated petroleum resin 42.3 parts by weight, rosin resin 7 parts by weight, antioxidant 0.7 parts by weight.

[0037] The preparation method of the above-mentioned hot melt adhesive of rubber system containing polyolefin and wax, comprising the following steps:

[0038] 1) naphthenic oil 3 parts by weight, white oil 7 parts by weight, styrene-butadiene-styrene (SBS) rubber 10 parts by weight, styrene-isoprene-styrene (SIS) rubber 6 parts by weight, antioxidant 0.7 parts by weight, are put into a reaction kettle, heating is started and stirring is uniform, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, vacuum is extracted during stirring, to prevent the rubber from being oxidized and cracked to affect the bonding performance of the adhesive;

[0039] 2) amorphous polyolefin elastomer (APAO) 12 parts by weight and polypropylene (PP) 3 parts by weight are put into the reaction kettle after step 1) is completed, and stirring is uniform, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, and vacuum is extracted during stirring;

[0040] 3) wax 4 parts by weight is put into the reaction kettle after step 2) is completed, and stirring is uniform, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, and vacuum is extracted during stirring;

[0041] 4) petroleum resin 42.3 parts by weight and rosin resin 7 parts by weight are put into the reaction kettle after step 3) is completed, and stirring is uniform, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, vacuum is extracted during stirring, the vacuum extraction time is controlled at 40-60min, and the vacuum extraction is stopped after the vacuum extraction time is over, to obtain hot melt adhesive crude material;

[0042] 5) the hot melt adhesive crude material obtained after step 4) is discharged through a three-bag filter with a mesh size of 100-200, (the mesh size of the filter bag is selected according to the viscosity of the obtained hot melt adhesive product), to obtain a hot melt adhesive product of rubber system containing polyolefin and wax.

[0043] The performance of the hot melt adhesive product of rubber system containing polyolefin and wax prepared in Example 2 is shown in Table 1.

[0044] Example 3:

[0045] A hot melt adhesive of rubber system containing polyolefin and wax, comprising the following components by weight: naphthenic oil 7 parts by weight, white oil 3 parts by weight, styrene-butadiene-styrene (SBS) rubber 14 parts by weight, styrene-isoprene-styrene (SIS) rubber 6 parts by weight, amorphous polyolefin elastomer (APAO) 8 parts by weight, polypropylene (PP) 7 parts by weight, wax 5 parts by weight, hydrogenated petroleum resin 49.7 parts by weight, antioxidant 0.3 parts by weight.

[0046] The preparation method of the above-mentioned hot melt adhesive of rubber system containing polyolefin and wax, comprising the following steps:

[0047] 1) naphthenic oil 7 parts by weight, white oil 3 parts by weight, styrene-butadiene-styrene (SBS) rubber 14 parts by weight, styrene-isoprene-styrene (SIS) rubber 6 parts by weight, antioxidant 0.3 parts by weight, are put into a reaction kettle, heating is started and stirring is uniform, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, vacuum is extracted during stirring, to prevent the rubber from being oxidized and cracked to affect the bonding performance of the adhesive;

[0048] 2) amorphous polyolefin elastomer (APAO) 8 parts by weight and polypropylene (PP) 7 parts by weight are put into the reaction kettle after step 1) is completed, and stirring is uniform, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, and vacuum is extracted during stirring;

[0049] 3) wax 5 parts by weight is put into the reaction kettle after step 2) is completed, and stirring is uniform, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, and vacuum is extracted during stirring;

[0050] 4) petroleum resin 39.7 parts by weight and rosin resin 10 parts by weight are put into the reaction kettle after step 3) is completed, and stirring is uniform, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, vacuum is extracted during stirring, the vacuum extraction time is controlled at 40-60min, and the vacuum extraction is stopped after the vacuum extraction time, to obtain hot melt adhesive crude material;

[0051] 5) the hot melt packaging adhesive crude material obtained after step 4) is discharged by a three-bag filter with a mesh size of 100-200, (the mesh size of the filter bag is selected according to the obtained hot melt adhesive product with different viscosities), to obtain a hot melt adhesive product of rubber system containing polyolefin and wax.

[0052] The performance of the hot melt adhesive product of rubber system containing polyolefin and wax prepared in Example 3 is shown in Table 1.

[0053] Example 4:

[0054] A hot melt adhesive of rubber system containing polyolefin and wax, comprising the following components by weight: naphthenic oil 7 parts by weight, white oil 3 parts by weight, styrene-butadiene-styrene (SBS) rubber 14 parts by weight, styrene-isoprene-styrene (SIS) rubber 6 parts by weight, amorphous polyolefin elastomer (APAO) 8 parts by weight, polypropylene (PP) 7 parts by weight, wax 5 parts by weight, petroleum resin (non-hydrogenated) 49.7 parts by weight, antioxidant 0.3 parts by weight.

[0055] The preparation method of the above-mentioned hot melt adhesive of rubber system containing polyolefin and wax, comprising the following steps:

[0056] 1), naphthenic oil 7 parts by weight, white oil 3 parts by weight, styrene-butadiene-styrene (SBS) rubber 14 parts by weight, styrene-isoprene-styrene (SIS) rubber 6 parts by weight, antioxidant 0.3 parts by weight, into the reaction kettle, start heating and stirring, the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, and the vacuum is extracted during the stirring process to prevent the rubber from being oxidized and cracked to affect the adhesive bonding performance;

[0057] 2), amorphous polyolefin elastomer (APAO) 8 parts by weight, polypropylene (PP) 7 parts by weight are put into the reaction kettle of step 1), and stirred uniformly, and the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, and the vacuum is extracted during the stirring process;

[0058] 3), wax 5 parts by weight is put into the reaction kettle of step 2), and stirred uniformly, and the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, and the vacuum is extracted during the stirring process;

[0059] 4), petroleum resin 39.7 parts by weight, rosin resin 10 parts by weight are put into the reaction kettle of step 3), and stirred uniformly, and the stirring speed is controlled at 30-50HZ, the reaction kettle is closed, and the vacuum is extracted during the stirring process, the vacuum extraction time is controlled at 40-60min, and the vacuum is released after the vacuum extraction time ends, to obtain hot melt adhesive crude material;

[0060] 5), the hot melt packaging adhesive crude material obtained in step 4) is discharged by a three-bag filter with a mesh size of 100-200, (the mesh size of the filter bag is selected according to the obtained hot melt adhesive product with different viscosity), to obtain a hot melt adhesive product of rubber system containing polyolefin and wax.

[0061] The preparation equipment used in the above preparation method is as follows:

[0062] Electric heating reaction kettle 1500L 1 set

[0063] (Stepless speed regulation motor 44KW, heat conducting oil 320# power 48KW)

[0064] Reaction kettle control system 1 set

[0065] External heating coal-fired furnace 1 set

[0066] Heat conducting oil circulating pump 1 set

[0067] Water circulating vacuum pump 1 set

[0068] Discharge pump 5.5KW 1 set

[0069] Electronic scale 60Kg 1

[0070] Filter system 1 set

[0071] Pocket filter screen 200 mesh 3

[0072] Iron mold box (capacity 10 Kg / each) 110 (rubber block line)

[0073] Temperature measuring instrument 1.

[0074] Test method of hot melt adhesive prepared in example 1 to example 4:

[0075] 1. Test the melt viscosity: according to GB / T 2794, test the viscosity at 180℃;

[0076] 2. Test the ring ball softening point: according to GB / T 15332-1994;

[0077] 3. Open time: according to Changde method (HM-02-01), test environment temperature: 25℃;

[0078] 4. Curing time: according to Changde method (HM-02-02), test environment temperature: 25℃;

[0079] 5. Penetration: according to Changde method (HM-02-04), test environment temperature: 25℃;

[0080] 6. Shear strength: according to Changde method (HM-02-03), evenly coat the hot melt adhesive on the material surface to be adhered with a glass rod, and within the open time of the hot melt adhesive, paste another test piece, and press it flat until the hot melt adhesive is cured. Five groups of test pieces are prepared, and the test pieces are placed in the test temperature for 24 hours, and then tested. The bonding material is wood test piece (test piece length is 10cm, width is 2.5cm, thickness is 0.3-0.4mm), bonding area is 2.5cm*2.5cm, test environment temperature: 25℃.

[0081] The test results of the hot melt adhesive prepared in example 1 to example 4 are shown in table 1:

[0082] Table 1

[0083]

[0084] Experimental conclusion: As can be seen from Table 1, the rubber system hot melt adhesive product containing polyolefin and wax prepared by the technical scheme disclosed in the application has low odor, low atomization value, excellent bonding performance (including shear strength and tensile strength), good high and low temperature resistance and aging resistance. Example 1 and Example 2 both contain hydrogenated petroleum resin and rosin resin, and have greater shear strength and tensile strength. Example 3 does not contain rosin resin, and has second shear strength and tensile strength. Example 4 does not contain hydrogenated petroleum resin and rosin resin, and has the smallest shear strength and tensile strength. At the same time, the preparation method of the application is simple, the production process does not emit harmful substances, and no solvent is used, belonging to an environmentally friendly adhesive.

[0085] The weight ratio of each raw material in the application is preferably as follows: 0-15 parts by weight of naphthenic oil, 0-10 parts by weight of white oil, 5-20 parts by weight of styrene-butadiene-styrene (SBS) elastomer, 5-25 parts by weight of styrene-isoprene-styrene, 3-15 parts by weight of amorphous polyolefin elastomer (APAO), 1-10 parts by weight of polypropylene (PP), 0-10 parts by weight of wax, 0-55 parts by weight of hydrogenated petroleum resin, 0-10 parts by weight of rosin resin, and 0.01-1 parts by weight of antioxidant.

[0086] The SBS rubber is one or more of SBS rubbers with different styrene contents, the SIS rubber is one or more of SIS rubbers with different two-block ratios, the amorphous polyolefin is one or more of polyolefins rich in ethylene, rich in propylene, and rich in butene, the hydrogenated petroleum resin is one or both of hydrogenated carbon five petroleum resin and hydrogenated carbon nine petroleum resin, the wax is one or more of paraffin wax, microcrystalline wax, and polyethylene wax, and the antioxidant is one or both of 816G and 6011.

[0087] It should be noted that, in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device.

[0088] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. A rubber-based hot melt adhesive containing polyolefin and wax, characterized in that: The product comprises the following components in parts by weight: 5 parts naphthenic oil, 5 parts white oil, 10 parts styrene-butadiene-styrene (SBS) rubber, 10 parts styrene-isoprene-styrene (SIS) rubber, 10 parts amorphous polyolefin elastomer APAO, 5 parts polypropylene (PP), 6 parts wax, 43.5 parts hydrogenated petroleum resin, 5 parts rosin resin, and 0.5 parts antioxidant. The hydrogenated petroleum resin is one or both of hydrogenated C5 and hydrogenated C9 petroleum resins.

2. The hot melt adhesive of a rubber system containing polyolefin and wax according to claim 1, characterized in that: The SBS rubber is one or more of SBS rubbers with different styrene contents, and the SIS rubber is one or more of SIS rubbers with different diblock contents.

3. The hot melt adhesive of a rubber system containing polyolefin and wax according to claim 1, characterized in that: The amorphous polyolefin APAO is one or more of the following: polyolefins rich in ethylene, propylene, and butene.

4. The hot melt adhesive of a rubber system containing polyolefin and wax according to claim 1, characterized in that: The wax is one or more of paraffin wax, microcrystalline wax, and polyethylene wax.

5. The hot melt adhesive of a rubber system containing polyolefin and wax according to claim 1, characterized in that: The antioxidant is one or a mixture of two of 816G or 6011.

6. The method for preparing the rubber system hot melt adhesive containing polyolefin and wax as described in any one of claims 1-5, characterized in that: Includes the following steps: 1) Add 5 parts by weight of naphthenic oil, 5 parts by weight of white oil, 10 parts by weight of styrene-butadiene-styrene SBS rubber, 10 parts by weight of styrene-isoprene-styrene SIS rubber, and 0.5 parts by weight of antioxidant to the reactor. Start heating and stirring evenly. Control the temperature of the material in the reactor at 165-180℃ and heat for 50-80 minutes until the material is completely melted. Control the stirring speed at 30-50HZ. Seal the reactor and apply a vacuum during the stirring process to prevent the rubber from undergoing oxidative cracking and affecting the adhesive performance. Keep the pressure inside the reactor less than -0.09MPa. 2) Add 10 parts by weight of amorphous polyolefin elastomer APAO and 5 parts by weight of polypropylene PP to the reactor after completing step 1), and stir evenly. Control the stirring speed at 30-50HZ. Seal the reactor and evacuate during the stirring process to keep the pressure inside the reactor less than -0.09MPa. 3) Add 6 parts by weight of wax to the reactor after completing step 2) and stir evenly. Control the stirring speed at 30-50 Hz. Seal the reactor and evacuate during the stirring process to keep the pressure inside the reactor less than -0.09 MPa. 4) Add 43.5 parts by weight of hydrogenated petroleum resin and 5 parts by weight of rosin resin to the reactor after completing step 3), and stir evenly. The stirring speed is controlled at 30-50 Hz. Seal the reactor and evacuate the vacuum during the stirring process. The vacuuming time is controlled at 40-60 min. After the vacuuming time is over, release the vacuum and keep the pressure inside the reactor less than -0.09 MPa to obtain hot melt adhesive crude material. 5) The hot melt packaging adhesive raw material obtained in step 4) is discharged through a three-bag filter with a mesh size of 100-200 to obtain a finished hot melt adhesive product containing polyolefin and wax.

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