Hot melt adhesive for sponge compounding and preparation method thereof

Abstract

The invention relates to the technical field of adhesives, in particular to a hot melt adhesive for sponge compounding and a preparation method thereof, and the hot melt adhesive is prepared from the following raw materials in parts by weight: 27-35 parts of a main polymer, 55-60 parts of tackifying resin, 8-10 parts of petroleum base filling oil and 0.2-0.3 part of an antioxidant; the main polymer comprises an olefin polymer. By introducing the specific main polymer, the tackifying resin, the petroleum base filling oil and the antioxidant, the cohesiveness and flexibility of the hot melt adhesive are improved, the aging resistance is improved, meanwhile, the color of the adhesive is controlled, the odor of the product is remarkably reduced, odor control in mattress composite application is achieved, and the application range of the hot melt adhesive is widened. The hot melt adhesive can meet the requirements of producing sponge mattresses in different temperature environments in four seasons on the hot melt adhesive.

Description

Technical Field

[0001] The invention relates to the technical field of adhesives, and in particular to a hot melt adhesive for sponge composite and a preparation method thereof. Background Art

[0002] As one of the most commonly used mattresses in modern times, sponge mattresses are increasingly favored by consumers. In the production process of sponge mattresses currently on the market, hot melt adhesive is required. However, due to the temperature difference between winter and summer, when the temperature is low, the amount of adhesive needs to be increased to meet the bonding strength requirements. The current hot melt adhesive cannot simultaneously meet the requirements of producing sponge mattresses in different temperature environments in four seasons.

[0003] Chinese patent CN104449465A discloses a hot melt adhesive for mattresses and sofas and a preparation method thereof. The raw materials for the preparation include amorphous polyolefins, petroleum resins and antioxidants. The adhesive force to various materials in mattresses and sofas is strong, the adhesive effect is balanced and not easy to age, and the adhesive force is maintained for a long time. Chinese patent CN112210330A discloses a hot melt adhesive for foam bonding inside sofas and mattresses and a preparation method thereof, which solves the problem that the hot melt adhesive for sofas and mattresses on the market generally has low shear strength and tensile strength, and poor bonding effect on curved sofas. However, it cannot simultaneously meet the requirements for producing sponge mattresses in different temperature environments in four seasons. Summary of the invention

[0004] In order to solve the problems in the prior art, the first aspect of the present invention provides a hot melt adhesive for sponge composite, the raw materials for its preparation include, by weight: 27-35 parts of a main polymer, 55-60 parts of a tackifying resin, 8-10 parts of a petroleum-based base filler oil, and 0.2-0.3 parts of an antioxidant; the main polymer includes an olefin polymer.

[0005] In one embodiment, the olefin polymer includes one or both of APAO and polyethylene.

[0006] In one embodiment, the olefinic polymer comprises APAO.

[0007] In one embodiment, the APAO has a brand name of RT-29180, which is purchased from Jiangsu Guangsu New Energy Materials Co., Ltd.

[0008] In one embodiment, the tackifying resin has a softening point of 90-145°C and a glass transition temperature of 35-88°C.

[0009] In one embodiment, the tackifying resin has a softening point of 90-120°C and a glass transition temperature of 35-60°C.

[0010] In one embodiment, the tackifying resin has a softening point of 98-110°C and a glass transition temperature of 53°C.

[0011] In one embodiment, the tackifying resin includes one or more of hydrogenated resin, monomer resin, rosin resin, and terpene phenol resin.

[0012] In one embodiment, the tackifying resin comprises a hydrogenated resin.

[0013] In one embodiment, the hydrogenated resin includes any one of C5 hydrogenated petroleum resin, C9 hydrogenated petroleum resin, C5 / C9 hydrogenated copolymer resin, and DCPD hydrogenated resin.

[0014] In one embodiment, the hydrogenated resin is a DCPD hydrogenated resin.

[0015] In one embodiment, the DCPD hydrogenated resin includes one or more of JH-6100, JH-6200, JH-6140, and JH-61250.

[0016] In one embodiment, the DCPD hydrogenated resin is JH-6100, purchased from Ningbo Jinhai Chenguang Chemical Co., Ltd.

[0017] In the present application, by adding a specific main polymer and a tackifying resin, the adhesion and wettability of the hot melt adhesive can be effectively improved, and the aging resistance can be improved. In particular, a DCPD hydrogenated resin with a softening point of 90-145°C and a glass transition temperature of 35-88°C is selected. Through the synergistic effect of a specific petroleum-based base filler oil in the system, the compatibility between the main polymer and the resin is improved, thereby improving the bonding strength of the hot melt adhesive, and the wettability of the hot melt adhesive is also significantly improved.

[0018] In one embodiment, the petroleum-based base filler oil includes one or both of naphthenic oil and white mineral oil.

[0019] In one embodiment, the mass ratio of the petroleum-based base filler oil to the main polymer is (1-2): (4-6).

[0020] In one embodiment, the mass ratio of the petroleum-based base filler oil to the main polymer is 1:3.

[0021] In one embodiment, the petroleum-based base extender oil is naphthenic oil.

[0022] In one embodiment, the cyclopentane oil includes one or more of cyclopentane oil KN4006, cyclopentane oil KN4010, and cyclopentane oil KN4016.

[0023] In one embodiment, the cyclohexane oil is cyclohexane oil KN4010, purchased from Karamay Kunlun.

[0024] In one embodiment, the antioxidant includes at least one of a hindered phenol antioxidant and a phosphite antioxidant.

[0025] In one embodiment, the antioxidant is a hindered phenol antioxidant.

[0026] In one embodiment, the hindered phenol antioxidant includes one or more of antioxidant 1076, antioxidant 1010, antioxidant 1790, and antioxidant 1098.

[0027] The second aspect of the present invention provides a method for preparing a hot melt adhesive for sponge composite, comprising the following steps: stirring and heating a main polymer, a petroleum-based base filler oil, an antioxidant and a tackifying resin to obtain the hot melt adhesive for sponge composite.

[0028] In one embodiment, the method for preparing the hot melt adhesive for sponge composite comprises the following steps:

[0029] S1: Heat the stirred kettle to 120-130°C, add petroleum-based base filler oil and antioxidant in sequence, then heat to 140-150°C, add the main polymer and heat to 155-170°C for melting;

[0030] S2: After adding the tackifying resin, evacuate the temperature, stir and mix evenly to obtain the hot melt adhesive for sponge lamination.

[0031] In one embodiment, the melting time in the step S1 is 60-70 min.

[0032] In one embodiment, the vacuum degree of vacuum cooling in step S2 is -84 KPa.

[0033] In one embodiment, the method for preparing the hot melt adhesive for sponge composite comprises the following steps:

[0034] S1: Heat the stirred kettle to 120-130°C, add petroleum-based base filler oil and antioxidant in sequence, then heat to 140-150°C, add the main polymer and heat to 155-170°C for melting for 60-70 minutes;

[0035] S2: After adding the tackifying resin, evacuate to -84 KPa, cool to 145°C and stir for 35 minutes to obtain the hot melt adhesive for sponge lamination.

[0036] Beneficial Effects

[0037] 1. In the present invention, by controlling the specific main polymer, tackifying resin, petroleum-based base filling oil and antioxidant, the adhesion and flexibility of the hot melt adhesive are improved, the aging resistance is improved, and the colloid color is controlled, the product odor is significantly reduced, and the odor control in the mattress composite application is achieved, which can meet the requirements of hot melt adhesive for the production of sponge mattresses in different temperature environments in four seasons.

[0038] 2. Based on the system of the present invention, a specific polyolefin is used as the main material, and a tackifying resin with a softening point of 110-145°C and a glass transition temperature of 35-88°C is added, and the mass ratio of the two is strictly controlled, thereby improving the bonding performance and wettability of the hot melt adhesive.

[0039] 3. Based on the system of the present invention, by adding a specific petroleum-based base filler oil, the compatibility between the main polymer and the tackifying resin is further improved, thereby improving the bonding strength of the hot melt adhesive.

[0040] 4. The preparation method of the hot melt adhesive for sponge composite provided by the present invention has no discharge of three wastes during production and use, does not contain organic solvents, is environmentally friendly and odorless.

[0041] 5. The hot melt adhesive prepared by the present invention has a good bonding effect on a variety of substrates. Different spraying methods can be set according to different requirements. It is convenient, fast and efficient, saves labor costs, and avoids the waste caused by changing glue varieties. It meets the market's demand for low-carbon and environmental protection. It has better environmental protection and application advantages than water-based glue. It will gradually replace water-based glue in the application market of mattresses and has a good market prospect. DETAILED DESCRIPTION

[0042] 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.

[0043] Example 1

[0044] In a first aspect, the present embodiment provides a hot melt adhesive for sponge composites, wherein the raw materials for preparing the hot melt adhesive include, by weight: 30 parts of a main polymer, 59.8 parts of a tackifying resin, 10 parts of a petroleum-based base filler oil, and 0.2 parts of an antioxidant; the main polymer includes an olefin polymer.

[0045] The olefin polymer is APAO, the brand of APAO is RT-29180, and it is purchased from Jiangsu Guangsu New Energy Materials Co., Ltd.

[0046] The tackifying resin has a softening point of 98-110°C and a glass transition temperature of 53°C.

[0047] The tackifying resin is DCPD hydrogenated resin.

[0048] The DCPD hydrogenated resin is JH-6100, purchased from Ningbo Jinhai Chenguang Chemical Co., Ltd.

[0049] The petroleum-based base filling oil is naphthenic oil, and the naphthenic oil is naphthenic oil KN4010 purchased from Karamay Kunlun.

[0050] The antioxidant is a hindered phenol antioxidant. The hindered phenol antioxidant is antioxidant 1010.

[0051] A second aspect of the present embodiment provides a method for preparing a hot melt adhesive for sponge compounding, comprising the following steps:

[0052] S1: Heat the stirred kettle to 120°C, add petroleum-based base filler oil and antioxidant in sequence, then heat to 140°C, add the main polymer and heat to 155°C to melt it for 60 minutes;

[0053] S2: Add tackifying resin and evacuate to -84KPa and cool to 145°C and stir for 35 minutes to obtain hot melt adhesive for sponge composite.

[0054] Comparative Example 1

[0055] The first aspect of this comparative example provides a hot melt adhesive for sponge composite, wherein the raw materials for its preparation include, by weight: 25 parts of a main polymer, 54.8 parts of a tackifying resin, 20 parts of a petroleum-based base filler oil, and 0.2 parts of an antioxidant; the main polymer includes an olefin polymer.

[0056] The olefin polymer is APAO, the brand of APAO is RT-29180, and it is purchased from Jiangsu Guangsu New Energy Materials Co., Ltd.

[0057] The tackifying resin has a softening point of 98-110°C and a glass transition temperature of 53°C.

[0058] The tackifying resin is DCPD hydrogenated resin.

[0059] The DCPD hydrogenated resin is JH-6100, purchased from Ningbo Jinhai Chenguang Chemical Co., Ltd.

[0060] The petroleum-based base filling oil is naphthenic oil, and the naphthenic oil is naphthenic oil KN4010 purchased from Karamay Kunlun.

[0061] The antioxidant is a hindered phenol antioxidant. The hindered phenol antioxidant is antioxidant 1010.

[0062] The second aspect of the present comparative example provides a method for preparing a hot melt adhesive for sponge compounding, comprising the following steps:

[0063] S1: Heat the stirred kettle to 120°C, add petroleum-based base filler oil and antioxidant in sequence, then heat to 140°C, add the main polymer and heat to 155°C to melt it for 60 minutes;

[0064] S2: Add tackifying resin and evacuate to -84KPa and cool to 145°C and stir for 35 minutes to obtain hot melt adhesive for sponge composite.

[0065] Performance Testing

[0066] Test objects: hot melt adhesive samples for sponge compounding prepared in Example 1 and Comparative Example 1.

[0067] 1. Viscosity and softening point test: The samples were tested according to HG / T 3660-1999 Determination of melt viscosity of hot melt adhesives and GB / T 15332-1994 Determination of softening point of hot melt adhesives - Ring and ball method. The results are shown in Table 1.

[0068] Table 1

[0069] sample Viscosity (cps, 150℃) Softening point(℃) Example 1 3200 103 Comparative Example 1 2800 98

[0070] 2. Peel strength: Referring to GB / T 2792-1998 standard, a certain amount of adhesive of Example 1 and Comparative Example 1 was sprayed between the hot-air nonwoven fabric and the cast film, and after the hot melt adhesive was cured, a tensile tester was used to test. The implementation conditions and results of each sample are shown in Table 2.

[0071] Table 2

[0072]

Claims

1. A hot melt adhesive for sponge lamination, characterized in that: The raw materials for its preparation include, by weight: 20-30 parts of main polymer, 50-60 parts of tackifying resin, 5-15 parts of petroleum-based base filling oil, and 0.2-0.3 parts of antioxidant; the main polymer includes olefin polymer.

2. The hot melt adhesive for sponge lamination according to claim 1, characterized in that: The olefin polymer includes one or both of APAO and polyethylene.

3. The hot melt adhesive for sponge lamination according to claim 1, characterized in that: The tackifying resin has a softening point of 90-145°C and a glass transition temperature of 35-88°C.

4. The hot melt adhesive for sponge lamination according to claim 3, characterized in that: The tackifying resin includes one or more of hydrogenated resin, monomer resin, rosin resin, and terpene phenol resin.

5. The hot melt adhesive for sponge lamination according to claim 4, characterized in that: The hydrogenated resin includes any one of C5 hydrogenated petroleum resin, C9 hydrogenated petroleum resin, C5 / C9 hydrogenated copolymer resin and DCPD hydrogenated resin.

6. The hot melt adhesive for sponge lamination according to claim 5, characterized in that: The DCPD hydrogenated resin includes one or more of JH-6100, JH-6200, JH-6140, and JH-61250.

7. The hot melt adhesive for sponge lamination according to claim 1, characterized in that: The mass ratio of the petroleum-based base filler oil to the main polymer is (1-2):(4-6).

8. The hot melt adhesive for sponge lamination according to claim 1, characterized in that: The antioxidant includes at least one of a hindered phenol antioxidant and a phosphite antioxidant.

9. A method for preparing a hot melt adhesive for sponge compounding according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: stirring and heating a main polymer, a petroleum-based base filling oil, an antioxidant and a tackifying resin to obtain a hot melt adhesive for sponge compounding.

10. The method for preparing hot melt adhesive for sponge compounding according to claim 9, characterized in that: The following steps are involved: S1: Heat the stirred kettle to 120-130°C, add petroleum-based base filler oil and antioxidant in sequence, then heat to 140-150°C, add the main polymer and heat to 155-170°C for melting; S2: After adding the tackifying resin, evacuate the temperature, stir and mix evenly to obtain the hot melt adhesive for sponge lamination.

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