High-speed bonding hot melt adhesive containing OPE wax as well as preparation method and application of high-speed bonding hot melt adhesive

Abstract

The invention discloses a high-speed bonding hot melt adhesive containing OPE wax as well as a preparation method and application of the high-speed bonding hot melt adhesive. The hot melt adhesive comprises the following components in percentage by weight: 10-25% of a main polymer; 40%-60% of tackifying resin; 10%-25% of white mineral oil; 5%-10% of a processing aid; 0.4% to 0.8% of an antioxidant 1010:; 0.1% to 0.3% of an antioxidant 412S; and 5%-25% of OPE wax. The preparation method of the hot melt adhesive comprises the following steps: mixing all the components, vacuumizing, heating and stirring until the materials are completely molten, stopping stirring, and vacuumizing and defoaming. The hot melt adhesive has the advantages of high bonding strength, good antioxidant effect, low viscosity, short curing time and the like, is suitable for non-polar base materials, can meet the production requirements of high-speed production lines, and is simple in preparation method, low in production cost and suitable for large-scale industrial production and application.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of hot melt adhesives, in particular to a high-speed bonding hot melt adhesive containing OPE wax and a preparation method and application thereof. BACKGROUND

[0002] The hot melt adhesive is a plastic adhesive, the physical state of which changes with temperature in a certain temperature range, and is widely used in the fields of hygiene materials, labels and packaging. However, the existing hot melt adhesives used in the fields of hygiene materials, labels and packaging have the problem of difficult bonding on the surface of non-polar substrates (for example, pure cotton surface layer, punched cotton non-woven fabric, cotton-like non-woven fabric, fluffy / slippery hot air non-woven fabric, etc.). Moreover, the existing hot melt adhesives used in the fields of hygiene materials, labels and packaging also have the problem of easy carbonization in high-temperature environments. In addition, the existing hot melt adhesives used in the fields of hygiene materials, labels and packaging also have the problems of too high viscosity and too long curing time, which cannot meet the production requirements of high-speed production lines. In summary, the existing hot melt adhesives used in the fields of hygiene materials, labels and packaging still have obvious defects, and it is difficult to completely meet the increasing actual application requirements, and the application has been greatly limited.

[0003] Therefore, it is of great significance to develop a hot melt adhesive with high bonding strength, good antioxidant effect, low viscosity, short curing time, suitable for non-polar substrates and capable of meeting the production requirements of high-speed production lines. SUMMARY

[0004] The application aims to provide a high-speed bonding hot melt adhesive containing OPE wax and a preparation method and application thereof.

[0005] The technical scheme adopted by the application is as follows:

[0006] A high-speed bonding hot melt adhesive containing OPE wax comprises the following components in percentage by weight:

[0007] Main polymer: 10% to 25%;

[0008] Tackifying resin: 40% to 60%;

[0009] White mineral oil: 10% to 25%;

[0010] Processing aid: 5% to 10%;

[0011] Antioxidant 1010: 0.4% to 0.8%;

[0012] Antioxidant 412S: 0.1% to 0.3%;

[0013] OPE wax: 5% to 25%.

[0014] Preferably, the main polymer is at least one of styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-butylene-styrene block copolymer (SEBS), ethylene-vinyl acetate copolymer (EVA).

[0015] Preferably, the tackifying resin is at least one of petroleum resin, hydrogenated C5 petroleum resin, hydrogenated DCPD petroleum resin, hydrogenated C9 resin, rosin resin, maleic anhydride modified rosin resin.

[0016] Preferably, the white mineral oil is naphthene oil with a weight percentage of naphthene greater than 40%.

[0017] Preferably, the processing aid is at least one of paraffin wax, Fischer-Tropsch wax, PE wax, PP wax.

[0018] Preferably, the number average molecular weight of the OPE wax (oxidized polyethylene wax) is 1500 g / mol to 6000 g / mol.

[0019] Further preferably, the OPE wax is low-density oxidized polyethylene wax VISCOCER 2216 of Ceronas, Germany.

[0020] A preparation method of the high-speed bonding hot melt adhesive containing OPE wax as described above comprises the following steps: mixing all components, and then vacuumizing, heating and stirring until the material is completely melted, stopping stirring and vacuumizing to remove bubbles, thereby obtaining the high-speed bonding hot melt adhesive containing OPE wax.

[0021] Preferably, the vacuumizing, heating and stirring are performed at a temperature of 150℃ to 160℃ and a vacuum degree of -0.10 MPa to -0.08 MPa.

[0022] The high-speed bonding hot melt adhesive containing OPE wax as described above is applied to bonding non-polar substrates.

[0023] The hot melt adhesive of the present application has the advantages of high bonding strength, good antioxidant effect, low viscosity, short curing time, etc., is suitable for non-polar substrates, can meet the production requirements of high-speed production lines, and has a simple preparation method, low production cost, and is suitable for large-scale industrial production and application.

[0024] Specifically:

[0025] 1) The hot melt adhesive of the present application adds antioxidants 1010 and 412S, which have a synergistic effect to give the hot melt adhesive excellent antioxidant properties, so that the hot melt adhesive can be used for a long time in a high-temperature environment without carbonization.

[0026] 2) The hot melt adhesive of the present application adds OPE wax, which can change the rheological properties of the hot melt adhesive, so that the hot melt adhesive has low viscosity and short curing time, which can meet the production requirements of high-speed production line;

[0027] 3) The hot melt adhesive of the present application has high bonding strength, and is suitable for non-polar substrates such as pure cotton surface layer, punched cotton non-woven fabric, cotton-like non-woven fabric, fluffy / slippery hot air non-woven fabric, etc.

[0028] 4) The preparation method of the hot melt adhesive of the present application is simple, the production cost is low, no special production equipment is needed, and it is suitable for large-scale industrial production and application. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The rheological property test result graph of the OPE wax-containing high-speed adhesive hot melt adhesive of Example 1, the OPE wax-containing high-speed adhesive hot melt adhesive of Example 5 and the hot melt adhesive of Comparative Example 1.

[0030] Figure 2 The viscosity comparison graph of the OPE wax-containing high-speed adhesive hot melt adhesive of Examples 1-5 and the hot melt adhesive of Comparative Example 1 at different temperatures.

[0031] Figure 3 The color change graph of the OPE wax-containing high-speed adhesive hot melt adhesive of Example 3 and the hot melt adhesive of Comparative Example 2 during the baking process. DETAILED DESCRIPTION

[0032] The present application will be further explained and described below in conjunction with specific embodiments.

[0033] Example 1:

[0034] An OPE wax-containing high-speed adhesive hot melt adhesive, the composition of which is shown in the following table:

[0035] Table 1 Composition table of an OPE wax-containing high-speed adhesive hot melt adhesive

[0036]

[0037] Note:

[0038] Antioxidant 1010: Tetra [beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester.

[0039] Antioxidant 412S: Pentaerythritol tetra (3-dodecylthiopropionate).

[0040] The preparation method of the above-mentioned OPE wax-containing high-speed adhesive hot melt adhesive is as follows:

[0041] All components were mixed, then warmed to 155℃ and vacuumized to a vacuum degree of -0.08 MPa, after which stirring was performed until the material was completely molten, and vacuum defoaming was then performed with stirring stopped, to obtain a high-speed adhesive hot melt adhesive containing OPE wax.

[0042] Example 2:

[0043] A high-speed adhesive hot melt adhesive containing OPE wax, which is completely identical to the high-speed adhesive hot melt adhesive containing OPE wax of Example 1, except that the amount of OPE wax is adjusted from “5%” to “10%” (adaptively reducing the amount of SIS).

[0044] Example 3:

[0045] A high-speed adhesive hot melt adhesive containing OPE wax, which is completely identical to the high-speed adhesive hot melt adhesive containing OPE wax of Example 1, except that the amount of OPE wax is adjusted from “5%” to “15%” (adaptively reducing the amount of SIS).

[0046] Example 4:

[0047] A high-speed adhesive hot melt adhesive containing OPE wax, which is completely identical to the high-speed adhesive hot melt adhesive containing OPE wax of Example 1, except that the amount of OPE wax is adjusted from “5%” to “20%” (adaptively reducing the amount of SIS).

[0048] Example 5:

[0049] A high-speed adhesive hot melt adhesive containing OPE wax, which is completely identical to the high-speed adhesive hot melt adhesive containing OPE wax of Example 1, except that the amount of OPE wax is adjusted from “5%” to “25%” (adaptively reducing the amount of SIS).

[0050] Comparative Example 1:

[0051] A hot melt adhesive, which is completely identical to the high-speed adhesive hot melt adhesive containing OPE wax of Example 1, except that the amount of OPE wax is adjusted from “5%” to “0” (adaptively increasing the amount of SIS).

[0052] Comparative Example 2:

[0053] A hot melt adhesive, which is completely identical to the high-speed adhesive hot melt adhesive containing OPE wax of Example 1, except that the amounts of antioxidant 1010 and antioxidant 412S are adjusted to “0” (adaptively increasing the amount of SIS).

[0054] Performance Test:

[0055] 1) The rheological performance test results of the high-speed adhesive hot melt adhesive containing OPE wax of Example 1, the high-speed adhesive hot melt adhesive containing OPE wax of Example 5, and the hot melt adhesive of Comparative Example 1 are as follows:Figure 1 (a is Comparative Example 1, b is Example 1, c is Example 5) shows.

[0056] It can be seen from Figure 1 that adding OPE wax is conducive to reducing the viscous flow temperature of the hot melt adhesive, and the viscous flow temperature is reduced from about 90°C to about 80°C, thereby being conducive to reducing the melt viscosity of the hot melt adhesive.

[0057] 2) The viscosity of the OPE wax-containing high-speed bonding hot melt adhesives of Examples 1-5 and the hot melt adhesive of Comparative Example 1 at different temperatures (90°C, 110°C and 130°C) is shown in the following table (the content of OPE wax in the OPE wax-containing high-speed bonding hot melt adhesives of Examples 1-5 and the hot melt adhesive of Comparative Example 1 is 5%, 10%, 15%, 20%, 25% and 0%, respectively) : Figure 2

[0058] It can be seen from Figure 2 that as the amount of added OPE wax increases, the viscosity of the hot melt adhesive at the same temperature is lower, and as the temperature increases, the viscosity of the hot melt adhesive decreases more and more obviously, indicating that OPE wax is conducive to reducing the viscosity of the hot melt adhesive.

[0059] 3) The OPE wax-containing high-speed bonding hot melt adhesives of Examples 1-5 and the hot melt adhesives of Comparative Examples 1-2 (the color of both before ultraviolet aging is light and transparent) were placed in an accelerated aging test machine equipped with two self-filtering ultraviolet lamp tubes with a power of 40W (center wavelength of 365nm) for ultraviolet irradiation, the irradiation time was 1200h, and the color change of the hot melt adhesives was observed, and the test results of the light stability of the hot melt adhesives are shown in the following table:

[0060] Table 2 Test results of light stability of hot melt adhesives

[0061] Test sample Light 360h Light 720h Light 800h Light 1200h Example 1 Light yellow transparent Light yellow transparent Light yellow transparent Yellow Example 2 Light yellow transparent Light yellow transparent Light yellow transparent Yellow Example 3 Light yellow transparent Light yellow transparent Light yellow transparent Light yellow transparent Example 4 Light yellow transparent Light yellow transparent Light yellow transparent Light yellow transparent Example 5 Light yellow transparent Light yellow transparent Light yellow transparent Light yellow transparent Comparative Example 1 Light yellow transparent Yellow Brownish red Brownish red Comparative Example 2 Yellow Yellow Brownish red Brownish red

[0062] It can be seen from Table 2 that adding OPE wax is conducive to improving the ultraviolet aging resistance of the hot melt adhesive, and as the amount of OPE wax increases, the time required for the hot melt adhesive to change color during aging increases.

[0063] 4) The OPE wax-containing high-speed bonding hot melt adhesives of Examples 1-5 and the hot melt adhesives of Comparative Examples 1-2 (the color of both before high temperature aging is light and transparent) were placed in an oven at 160°C for baking, the baking time was 72h, and the color change of the hot melt adhesives was observed, and the test results of the high temperature stability of the hot melt adhesives are shown in the following table (the color change of the OPE wax-containing high-speed bonding hot melt adhesive of Example 3 and the hot melt adhesive of Comparative Example 2 during baking is shown in Figure 3 ):

[0064] Table 3 Test results of high temperature stability of hot melt adhesives

[0065] ​ Test sample Bake 24h Bake 48h Bake 72h Example 1 Light yellow transparent Light yellow transparent Light yellow transparent Example 2 Light yellow transparent Light yellow transparent Light yellow transparent Example 3 Light yellow transparent Light yellow transparent Light yellow transparent Example 4 Light yellow transparent Light yellow transparent Light yellow transparent Example 5 Light yellow transparent Light yellow transparent Light yellow transparent Comparative Example 1 Yellow Yellow Brownish red Comparative Example 2 Yellow Brownish red Brownish red

[0066] From Table 3 and Figure 3 It can be seen that adding OPE wax, antioxidant 1010 and antioxidant 412S is beneficial to improve the high-temperature aging resistance of the hot melt adhesive.

[0067] 5) The viscosity and solidification time test results of the OPE wax-containing high-speed bonding hot melt adhesives of Examples 1-5 and the hot melt adhesive of Comparative Example 1 in the temperature rising-falling process (the temperature rising-falling rate is 0.1℃ / min, and the reading is recorded after 10s of holding at the target temperature) are shown in the following table:

[0068] Table 4 Viscosity and solidification time test results of hot melt adhesives in temperature rising-falling process

[0069]

[0070] Note:

[0071] Viscosity: tested according to "ASTM D3236-15 Standard Test Method for Apparent Viscosity of Hot Melt Adhesives and Coating Materials".

[0072] Solidification time: first prepare a standard test substrate paperboard, then coat a specified amount of hot melt adhesive (in a molten state) on one paperboard, and immediately adhere the second paperboard to it in a specified manner (angle, pressure, speed), which is recorded as t=0. Then, at different time intervals (for example: 3s, 5s, 10s and 15s), peel off the bonded sample and observe the peeling condition to determine the solidification time.

[0073] From Table 4, it can be seen that adding a certain amount of OPE wax can adjust the viscosity and solidification time of the hot melt adhesive, meeting the requirement of short open time when the hot melt adhesive is applied on a high-speed coater, thereby avoiding the risk of glue penetration and substrate burning during high-speed bonding, and also ensuring that the hot melt adhesive can still be effectively bonded on a high-speed production line.

[0074] The above examples are the preferred embodiments of the present application, but the embodiments of the present application are not limited by the above examples, and any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present application are equivalent replacement methods and are included in the protection scope of the present application.

Claims

1. A high speed adhesive hot melt glue containing OPE wax, characterized in that, The composition comprises the following components by weight percentage: Main polymer: 10%~25%; Tackifying resin: 40%~60%; White mineral oil: 10%~25%; Processing aid: 5%~10%; Antioxidant 1010: 0.4%~0.8%; Antioxidant 412S: 0.1%~0.3%; OPE wax: 5%~25%.

2. The OPE wax containing high speed adhesive hot melt glue according to claim 1, characterized in that: The main polymer is at least one of styrene-butadiene-styrene block copolymer, styrene-isoprene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, and ethylene-vinyl acetate copolymer.

3. The OPE wax containing high speed adhesive hot melt glue according to claim 1, characterized in that: The tackifying resin is at least one of petroleum resin, hydrogenated C5 petroleum resin, hydrogenated DCPD petroleum resin, hydrogenated C9 resin, rosin resin, and maleic anhydride modified rosin resin.

4. The OPE wax containing high speed adhesive hot melt glue according to any one of claims 1-3, characterized in that: The white mineral oil is naphthene oil with a weight percentage of naphthene hydrocarbon greater than 40%.

5. The OPE wax containing high speed adhesive hot melt glue according to any one of claims 1-3, characterized in that: The processing aid is at least one of paraffin wax, Fischer-Tropsch wax, PE wax, and PP wax.

6. The OPE wax containing high speed adhesive hot melt glue according to any one of claims 1-3, characterized in that: The OPE wax has a number average molecular weight of 1500g / mol~6000g / mol.

7. The OPE wax containing high speed adhesive hot melt glue according to claim 6, characterized in that: The OPE wax is low density oxidized polyethylene wax VISCOCER 2216 from Germany Ceronas Company.

8. A process for the preparation of a high speed adhesive hot melt wax containing OPE wax as claimed in any one of claims 1 to 7, characterized in that, The method comprises the following steps: mixing all the components, vacuumizing, heating, and stirring until the material is completely melted, then stopping the stirring and vacuumizing to remove bubbles, thereby obtaining the high-speed adhesive hot melt glue containing OPE wax.

9. The method of claim 8, wherein: The vacuumizing, heating, and stirring are performed at a temperature of 150°C~160°C and a vacuum degree of -0.10MPa~ -0.08MPa.

10. Use of the high-speed adhesive hot melt glue containing OPE wax as claimed in any one of claims 1~7 for bonding non-polar substrates.

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