Hot-melt pressure-sensitive adhesive for high-end magic tape and preparation method of hot-melt pressure-sensitive adhesive

Abstract

The invention relates to the technical field of adhesives, in particular to a hot-melt pressure-sensitive adhesive for a high-end magic tape and a preparation method of the hot-melt pressure-sensitive adhesive, and the hot-melt pressure-sensitive adhesive is prepared from the following raw materials in parts by mass: 35-45 parts of a main polymer, 37-50 parts of petroleum resin, 10-15 parts of filling oil and 0.2-0.5 part of an antioxidant. By limiting the parameter indexes of SIS and SBS and jointly introducing maleic anhydride grafted resin, hydrogenated DCPD resin and monomer resin, the requirements for the initial viscosity and persistent viscosity of the hot-melt pressure-sensitive adhesive in different use scenes are met, and the hot-melt pressure-sensitive adhesive which is wide in temperature-resistant range, suitable for various pasted objects and capable of giving consideration to initial viscosity and high cohesion is developed.

Description

Technical Field

[0001] The present invention relates to the technical field of adhesives, and in particular to a hot-melt pressure-sensitive adhesive for high-end Velcro fasteners and a preparation method thereof. Background Art

[0002] The industry term for Velcro is "mother-and-child fastener". It consists of two sides: one side is soft fiber, and the other side is elastic fiber with hooks and barbs. It is made by applying a layer of special self-adhesive glue on the back of the Velcro at high temperature. When using the product, press the back glue and the material to be adhered. Simply peel off the release paper on the back of the Velcro and stick it on various types of smooth and clean objects.

[0003] Depending on the application scenario, Velcro may be attached to plastic surfaces, hardware surfaces, wood, electronic product surfaces, etc. For objects with low surface energy, the Velcro adhesive needs to have higher initial adhesion. At the same time, some application scenarios require the adhesive to have higher cohesion to provide longer lasting adhesion. In hot melt pressure sensitive adhesives, initial adhesion and lasting adhesion are a pair of contradictory mechanical properties.

[0004] Chinese invention patent CN103045152A discloses a reactive polyurethane hot melt adhesive for Velcro and a preparation method thereof, wherein amorphous polyester, crystalline polyester and tackifying resin are mixed and vacuum dehydrated, and then isocyanate is added and vacuum heated to obtain the reactive polyurethane hot melt adhesive for Velcro. Although the product has a high initial strength, its sustained adhesion needs to be improved. Summary of the invention

[0005] In order to solve the problems in the prior art, the first aspect of the present invention provides a hot melt pressure-sensitive adhesive for high-end Velcro. The raw materials for its preparation include, by weight: 35-45 parts of a main polymer, 37-50 parts of a petroleum resin, 10-15 parts of a filler oil, and 0.2-0.5 parts of an antioxidant.

[0006] In one embodiment, the host polymer includes one or more of styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butylene-styrene block copolymer (SEBS), and styrene-ethylene-propylene-styrene block copolymer (SEPS).

[0007] In one embodiment, the host polymers are SIS and SBS.

[0008] In one embodiment, the mass ratio of SIS to SBS in the main polymer is (4-5): (3-4).

[0009] In one embodiment, the mass ratio of SIS to SBS in the main polymer is 25:18.

[0010] In one embodiment, the structure of the SIS includes any one of a linear structure and a star structure, and the diblock content of the SIS is 20-50%.

[0011] In one embodiment, the SIS is a linear structure, the diblock content of the SIS is 50%, and it is purchased from Baling Petrochemical with a grade of YH-1126.

[0012] In one embodiment, the SBS has a melt flow rate (200° C., 5 kg) of 0.1-5 g / 10 min and a tensile strength of 10-20 MPa.

[0013] In one embodiment, the SBS has a melt flow rate (200° C., 5 kg) of 5 g / 10 min and a tensile strength of 10 MPa. It is purchased from Baling Petrochemical and has a grade of YH-796.

[0014] In one embodiment, the petroleum resin includes one or more of DCPD resin, monomer resin, and modified petroleum resin.

[0015] In one embodiment, the petroleum resin includes DCPD resin, monomer resin and modified petroleum resin.

[0016] In one embodiment, the DCPD resin is a hydrogenated DCPD resin, and the modified petroleum resin is a maleic anhydride grafted resin.

[0017] In one embodiment, the hydrogenated DCPD resin is HD-1100, purchased from Zibo Luhua Hongjin New Materials Group Co., Ltd.

[0018] In one embodiment, the maleic anhydride grafted resin is TX-2200, purchased from Anhui Tongxin New Material Technology Co., Ltd.

[0019] In one embodiment, the monomer resin is MK-85, purchased from Kolon of Korea.

[0020] In one embodiment, the mass ratio of the monomer resin to the modified petroleum resin is (2-5):(5-10).

[0021] In one embodiment, the mass ratio of the DCPD resin, the monomer resin, and the modified petroleum resin is (30-35): (2-5): (5-10).

[0022] In one embodiment, the mass ratio of the DCPD resin, the monomer resin, and the modified petroleum resin is 32.2:5:7.5.

[0023] In one embodiment, the extender oil includes one or more of paraffin oil, naphthenic oil, and white mineral oil.

[0024] In one embodiment, the extender oil comprises a naphthenic oil.

[0025] In one embodiment, the naphthenic oil is of grade N4010, purchased from PetroChina.

[0026] In one embodiment, the antioxidant includes at least one of a hindered phenol antioxidant and a phosphite antioxidant.

[0027] In one embodiment, the antioxidant comprises a hindered phenolic antioxidant.

[0028] In one embodiment, the hindered phenol antioxidant is one or more of 1076, 1010, 1790, and 1098.

[0029] The second aspect of the present invention provides a method for preparing a hot melt pressure sensitive adhesive for high-end Velcro, comprising the following steps: stirring and heating a main polymer, a filler oil, an antioxidant and a petroleum resin to obtain the hot melt pressure sensitive adhesive for high-end Velcro.

[0030] In one embodiment, the preparation method comprises the following specific steps:

[0031] S1: Heat the filled oil bath to 110-115℃ and maintain for 5-10min, and control the stirring speed at 20-30r / min;

[0032] S2: Add hydrogenated DCPD resin and heat to 115-120°C, stirring for 10-15 minutes;

[0033] S3: Add SBS and antioxidant and heat to 120-125℃, stir for 9-11min;

[0034] S4: Add SIS, evacuate, heat to 130-135°C, and stir for 30-40 minutes until the rubber particles are completely melted;

[0035] S5: Turn off the vacuum, add monomer resin and maleic anhydride modified resin, evacuate and heat to 145-150°C, turn off the electric heating, increase the stirring speed to 40-50r / min, stir for 20-30min and turn off the vacuum.

[0036] In one embodiment, the vacuum degree in S4 and S5 is -0.1 MPa.

[0037] Beneficial Effects

[0038] 1. The present invention solves the requirements for initial adhesion and sustained adhesion of hot melt pressure-sensitive adhesives in different usage scenarios, and develops a hot melt pressure-sensitive adhesive with a wide temperature resistance range, suitable for various types of adhered objects, and taking into account initial adhesion and high cohesion.

[0039] 2. Based on the system of the present invention, by introducing modified petroleum resin and monomer resin together, especially limiting the modified petroleum resin to maleic anhydride grafted resin, and controlling the mass ratio of monomer resin to modified petroleum resin to (2-5): (5-10), it has good compatibility with other substances in the system, can balance the viscosity and stability of the system, and improve the bonding strength of the hot melt pressure-sensitive adhesive finally prepared.

[0040] 3. Based on the system of the present invention, SIS rubber and SBS rubber are introduced at the same time, especially by limiting the parameter indicators of SIS and SBS and further controlling the mass ratio of SIS and SBS to (4-5): (3-4), the cohesion and initial adhesion of the hot melt pressure-sensitive adhesive finally prepared can be improved.

[0041] 4. The method for preparing the hot-melt pressure-sensitive adhesive for high-end Velcro provided by the present invention adopts vacuum stirring treatment, so that the prepared hot-melt pressure-sensitive adhesive can maintain sufficient cohesive force and high stability.

[0042] 5. The hot-melt pressure-sensitive adhesive of the present invention has a simple preparation process and good practical value. It can be widely used in clothing factories, shoe and hat factories, luggage factories, sofa factories, curtain factories, toy factories, tent factories, glove factories, sports equipment factories, medical equipment factories, electronic plastic factories and various military products and other industries. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The experimental methods in the examples without specifying specific conditions are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used without specifying the manufacturer are all conventional products that can be purchased commercially.

[0044] Example 1

[0045] A first aspect of the present embodiment provides a hot melt pressure-sensitive adhesive for high-end Velcro, wherein the raw materials for its preparation include, by weight: 43 parts of a main polymer, 44.7 parts of a petroleum resin, 12 parts of a filler oil, and 0.3 parts of an antioxidant.

[0046] The main polymers are SIS and SBS.

[0047] The mass ratio of SIS to SBS in the main polymer is 25:18.

[0048] The SIS is a linear structure, has a diblock content of 50%, and is purchased from Baling Petrochemical with a brand name of YH-1126.

[0049] The SBS has a melt flow rate (200° C., 5 kg) of 5 g / 10 min and a tensile strength of 10 MPa. It is purchased from Baling Petrochemical and has a grade of YH-796.

[0050] The petroleum resin is DCPD resin, monomer resin and modified petroleum resin.

[0051] The DCPD resin is a hydrogenated DCPD resin with a brand number of HD-1100, which is purchased from Zibo Luhua Hongjin New Materials Group Co., Ltd.

[0052] The modified petroleum resin is a maleic anhydride grafted resin, the maleic anhydride grafted resin is TX-2200, and is purchased from Tongxin.

[0053] The monomer resin is MK-85, purchased from Kolon of South Korea.

[0054] The mass ratio of the monomer resin to the modified petroleum resin is 5:7.5.

[0055] The mass ratio of the DCPD resin, the monomer resin and the modified petroleum resin is 32.2:5:7.5.

[0056] The filler oil is cyclohexane oil, the brand of which is N4010 and is purchased from PetroChina.

[0057] The antioxidant is antioxidant 1010.

[0058] A second aspect of the present embodiment provides a method for preparing a hot melt pressure-sensitive adhesive for high-end hook and loop fasteners, comprising the following steps:

[0059] S1: Heat the filled oil bath to 115°C for 10 min, and control the stirring speed at 25 r / min;

[0060] S2: Add hydrogenated DCPD resin and heat to 120°C, stirring for 15 minutes;

[0061] S3: Add SBS and antioxidant and heat to 125℃, stir for 10min;

[0062] S4: Add SIS, evacuate to -0.1 MPa, heat to 135°C, and stir for 35 min until the rubber particles are completely melted;

[0063] S5: Turn off the vacuum, add monomer resin and maleic anhydride modified resin, evacuate to -0.1MPa and heat to 145°C, turn off the electric heating, increase the stirring speed to 45r / min, stir for 30min and turn off the vacuum.

[0064] Example 2

[0065] The specific implementation of this embodiment is the same as that of Embodiment 1, except that, in terms of weight percentage, the raw materials for its preparation include: 35 parts of main polymer, 44.7 parts of petroleum resin, 20 parts of filler oil, and 0.3 parts of antioxidant.

[0066] The mass ratio of SIS to SBS in the main polymer is 4:3.

[0067] The petroleum resin is hydrogenated DCPD resin.

[0068] The raw materials used in this example are all the same brands produced by the same manufacturer as in Example 1.

[0069] Example 3

[0070] The specific implementation of this embodiment is the same as that of Embodiment 1, except that, in terms of weight percentage, the raw materials for its preparation include: 35 parts of main polymer, 44.8 parts of petroleum resin, 20 parts of filler oil, and 0.2 parts of antioxidant.

[0071] The mass ratio of SIS to SBS in the main polymer is 4:3.

[0072] The petroleum resin is hydrogenated DCPD resin and monomer resin.

[0073] The mass ratio of the hydrogenated DCPD resin to the monomer resin is 15:1.

[0074] The raw materials used in this example are all the same brands produced by the same manufacturer as in Example 1.

[0075] Example 4

[0076] The specific implementation of this embodiment is the same as that of Embodiment 1, except that, in terms of weight percentage, the raw materials for its preparation include: 35 parts of main polymer, 49.7 parts of petroleum resin, 15 parts of filler oil, and 0.3 parts of antioxidant.

[0077] The main polymers are SIS and SBS.

[0078] The mass ratio of SIS to SBS in the main polymer is 4:3.

[0079] The SIS is a linear structure, has a diblock content of 50%, and is purchased from Baling Petrochemical with a brand name of YH-1126.

[0080] The SBS has a melt flow rate (200° C., 5 kg) of 5 g / 10 min and a tensile strength of 10 MPa. It is purchased from Baling Petrochemical and has a grade of YH-796.

[0081] The petroleum resin is DCPD resin, monomer resin and modified petroleum resin.

[0082] The DCPD resin is a hydrogenated DCPD resin with a brand number of HD-1100, which is purchased from Zibo Luhua Hongjin New Materials Group Co., Ltd.

[0083] The modified petroleum resin is a maleic anhydride grafted resin, the maleic anhydride grafted resin is TX-2200, and is purchased from Tongxin.

[0084] The monomer resin is MK-85, purchased from Kolon of South Korea.

[0085] The mass ratio of the monomer resin to the modified petroleum resin is 5:7.5.

[0086] The mass ratio of the DCPD resin, the monomer resin and the modified petroleum resin is 37.2:5:7.5.

[0087] The filler oil is cyclohexane oil, the brand of which is N4010 and is purchased from PetroChina.

[0088] The antioxidant is antioxidant 1010.

[0089] Performance Testing

[0090] Test object: hot melt pressure-sensitive adhesive samples for high-end Velcro prepared in Examples 1-4.

[0091] 1. Ring initial adhesion: Test according to GB / T 31125-2014 adhesive tape initial adhesion test method.

[0092] 2. Peel strength: 180° peel strength is tested according to the test method of peel strength of adhesive tape in GB / T 2792-2014.

[0093] 3. Stickiness: The stickiness time is tested according to the test method of GB / T 4851-2014 for stickiness of adhesive tapes.

[0094] The test data are listed in Table 1.

[0095] Table 1

[0096] <![CDATA[Ring tack force (N / in 2 )]]> 180° peel strength (N / in) <![CDATA[Holding time (1 in 2 、2 kg)]]> Example 1 35 68 ＞72h Example 2 32 41 10h Example 3 26 45 20h Example 4 35 50 40h

Claims

1. A hot melt pressure sensitive adhesive for high-end hook and loop fasteners, characterized in that: The raw materials for its preparation include, by weight: 35-45 parts of main polymer, 37-50 parts of petroleum resin, 10-15 parts of filler oil, and 0.2-0.5 parts of antioxidant.

2. The hot melt pressure sensitive adhesive for high-end Velcro according to claim 1, characterized in that: The main polymer includes one or more of SIS, SBS, SEBS and SEPS.

3. The hot melt pressure sensitive adhesive for high-end Velcro according to claim 2, characterized in that: The mass ratio of SIS to SBS in the main polymer is (4-5): (3-4).

4. The hot melt pressure sensitive adhesive for high-end Velcro according to claim 3, characterized in that: The structure of the SIS includes any one of a linear structure and a star structure, and the diblock content of the SIS is 20-50%.

5. The hot melt pressure sensitive adhesive for high-end hook and loop fastener according to claim 1, characterized in that: The petroleum resin includes one or more of DCPD resin, monomer resin and modified petroleum resin.

6. The hot melt pressure sensitive adhesive for high-end hook and loop fastener according to claim 5, characterized in that: The mass ratio of the monomer resin to the modified petroleum resin is (2-5):(5-10).

7. The hot melt pressure sensitive adhesive for high-end hook and loop fastener according to claim 5, characterized in that: The DCPD resin is a hydrogenated DCPD resin; and the modified petroleum resin is a maleic anhydride grafted resin.

8. The hot melt pressure sensitive adhesive for high-end Velcro according to claim 1, characterized in that: The filler oil includes one or more of paraffin oil, naphthenic oil, and white mineral oil.

9. The hot melt pressure sensitive adhesive for high-end Velcro according to claim 1, characterized in that: The antioxidant includes at least one of a hindered phenol antioxidant and a phosphite antioxidant.

10. A method for preparing a hot melt pressure sensitive adhesive for high-end hook and loop fastener according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: stirring and heating a main polymer, a filling oil, an antioxidant and a petroleum resin to obtain a hot-melt pressure-sensitive adhesive for high-end hook and loop fasteners.