CN114181645A - Environment-friendly hot-melt glue and preparation method thereof - Google Patents
Environment-friendly hot-melt glue and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09J123/0853—Vinylacetate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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Abstract
The application relates to the technical field of hot melt adhesives, and particularly discloses an environment-friendly hot melt adhesive and a preparation method thereof. The environment-friendly hot-melt glue is mainly prepared from the following raw materials in parts by weight: 22-35 parts of EVA emulsion, 18-30 parts of filler, 0.35-0.6 part of dimethyl sulfoxide, 10-20 parts of tackifier, 0.05-0.1 part of assistant and 260 parts of water 120-; the tackifier consists of acrylic emulsion, quaternary ammonium base and oxidized polyethylene wax according to the mass ratio of (33-40) to (0.8-1.5) to (12-25). The environment-friendly hot-melt glue has the advantages of strong bonding force and good weather resistance.
Description
Technical Field
The application relates to the technical field of hot melt adhesives, in particular to an environment-friendly hot melt adhesive and a preparation method thereof.
Background
The hot melt adhesive is one of more glues widely used in various industries, can be used as a fabric hot melt adhesive, a hot melt adhesive for packaging and book binding, a hot melt pressure sensitive adhesive, a furniture edge sealing hot melt adhesive, a hot melt adhesive film and the like, has the advantages of low pollution and low cost, and is deeply popular.
Chinese patent application publication No. CN107841263A discloses a water-soluble hot melt adhesive glue, which comprises a binder, a tackifier, a filler, an organic silicon defoamer, an organic silicon mildew preventive, other additives and water, wherein the formulation comprises the following components in a proportion by weight based on 100 parts of the total amount of nonvolatile components: 10-40 parts of adhesive, 10-30 parts of tackifier, 20-60 parts of filler, 10-100000ppm of organic silicon defoamer, 1-10000ppm of organic silicon mildew inhibitor, 0.1-5 parts of assistant and 300 parts of water.
For the water-soluble hot melt adhesive glue, the inventor believes that when terpene phenolic resin emulsion and modified rosin emulsion are used as the tackifier, the cohesive force is poor, the adhesive force of the glue is poor, and the molecular structure contains double bonds or carboxyl groups, so that the reaction activity is too strong, the glue is unstable to light, heat and the like, and the weather resistance is poor.
Disclosure of Invention
In order to improve the bonding force and the weather resistance of the hot-melt glue, the application provides the environment-friendly hot-melt glue and the preparation method thereof.
In a first aspect, the present application provides an environment-friendly hot melt glue, which adopts the following technical scheme:
the environment-friendly hot-melt glue is mainly prepared from the following raw materials in parts by weight: 22-35 parts of EVA emulsion, 18-30 parts of filler, 0.35-0.6 part of dimethyl sulfoxide, 10-20 parts of tackifier, 0.05-0.1 part of assistant and 260 parts of water 120-; the tackifier consists of acrylic emulsion, quaternary ammonium base and oxidized polyethylene wax according to the mass ratio of (33-40) to (0.8-1.5) to (12-25).
By adopting the technical scheme, the EVA emulsion, the filler, the water and other raw materials form a stable high-molecular cohesive system under the dissolution promoting and dispersing effects of the dimethyl sulfoxide, the acrylic emulsion, the quaternary ammonium base and the oxidized polyethylene wax in the tackifier are uniformly dispersed in the high-molecular cohesive system, and the acrylic emulsion, the oxidized polyethylene wax and a macromolecular chain of the EVA emulsion are crosslinked and combined into a net structure, so that the toughness and the impact resistance of the cohesive system are improved. And quaternary ammonium base and active group in the cohesive system are combined in a closed manner, so that the thermal and oxygen environmental stability of the cohesive system is improved, and meanwhile, the dendritic molecular structure of the quaternary ammonium base has great steric hindrance, so that a good bridge function is achieved, the binding power of the cohesive system is further improved, and the binding performance and the weather resistance of the environment-friendly hot-melt glue are greatly improved.
Preferably, the oxidized polyethylene wax is subjected to glycidyl methacrylate grafting modification treatment.
By adopting the technical scheme, the oxidized polyethylene wax subjected to the grafting treatment of the glycidyl methacrylate has better compatibility with a cohesive system and better rheological property. On the other hand, the cross-linking combination with the cohesive system can be promoted, the stress resistance and the cracking resistance of the cohesive system are further improved, and the binding power is better.
Preferably, the grafting ratio of the oxidized polyethylene wax is 3.5-5%.
By adopting the technical scheme, the grafting rate of the glycidyl methacrylate to the oxidized polyethylene wax is optimized and adjusted, the combined crosslinking state of the glycidyl methacrylate and the cohesive system is improved, and the adhesive force of the cohesive system are improved.
Preferably, the quaternary ammonium base is one of tetramethylammonium hydroxide, trimethylethylammonium hydroxide and tetrabutylammonium hydroxide.
By adopting the technical scheme, the types of quaternary ammonium hydroxide are tested and optimized, the reaction activity and the steric hindrance of quaternary ammonium hydroxide molecules are balanced, and the adhesive property and the weather resistance of a cohesive system are further improved.
Preferably, the EVA emulsion consists of high-vinyl-acetate-content EVA emulsion and low-vinyl-acetate-content EVA emulsion according to the mass ratio of (3-7) to (22-35).
By adopting the technical scheme, the content of the vinyl acetate in the EVA emulsion is optimized and adjusted, and the toughness, impact resistance and strength of a cohesive system are balanced, so that the comprehensive mechanical property of the environment-friendly hot-melt glue is better.
Preferably, the mass ratio of the tackifier to the EVA emulsion is (0.45-0.6): 1.
By adopting the technical scheme, the mass ratio of the tackifier to the EVA emulsion is optimized and adjusted, the crosslinking state of the cohesive system is further improved, the rheological property of the cohesive system is improved, and the toughness and the strength are better.
Preferably, the raw material also comprises 0.5-0.8 weight part of azobisisobutyronitrile.
By adopting the technical scheme, after the azodiisobutyronitrile is uniformly dispersed in the cohesive system, the crosslinking reaction of residual active groups in the cohesive system is further promoted, the light resistance, heat resistance and oxygen resistance of the cohesive system are further improved, the free radical reaction in long-term use is reduced, and the weather resistance of the environment-friendly hot-melt glue is improved.
In a second aspect, the application provides a preparation method of an environment-friendly hot melt glue, which adopts the following technical scheme:
a preparation method of environment-friendly hot melt glue comprises the following steps:
s1: uniformly mixing the EVA emulsion, the filler, dimethyl sulfoxide and water according to the formula ratio to obtain a mixed solution;
s2: and (4) adding the tackifier and the auxiliary agent into the mixed liquid obtained in the step S1, and stirring and mixing at a high speed to obtain the adhesive.
By adopting the technical scheme, the EVA emulsion, the filler, the dimethyl sulfoxide and the water are mixed, uniform mixed liquid is formed under the dissolution promoting and dispersion promoting effects of the dimethyl sulfoxide, and then the tackifier and the auxiliary agent are added and then mixed at a high speed, so that the raw materials are fully mixed and reacted to form the stable and uniform environment-friendly hot-melt glue, and the performance is more stable.
Preferably, step S2 further includes a step of adding azobisisobutyronitrile.
By adopting the technical scheme, the weather resistance of the environment-friendly hot-melt glue is further improved after the azodiisobutyronitrile is added, and the service life is longer.
In summary, the present application has the following beneficial effects:
1. since the acrylic emulsion, the quaternary ammonium hydroxide and the oxidized polyethylene wax are compounded and used as the tackifier, the mechanical property and the weather resistance of the environment-friendly hot-melt glue are greatly improved.
2. In the application, the oxidized polyethylene wax is preferably subjected to graft modification by using glycidyl methacrylate, so that the crosslinking state of a cohesive system is improved, and the toughness, strength and binding power of the cohesive system are improved.
3. The environment-friendly hot-melt glue prepared by the preparation method has high adhesive force and good weather resistance.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials of the examples and comparative examples of the present application are generally commercially available unless otherwise specified.
Examples
Example 1
The environment-friendly hot-melt glue of the embodiment is prepared from the following raw materials by weight: 22kg of EVA emulsion, 18kg of filler, 0.35kg of dimethyl sulfoxide, 10kg of tackifier, 0.05kg of auxiliary agent and 120kg of water.
Wherein the tackifier consists of acrylic emulsion, quaternary ammonium base and oxidized polyethylene wax according to the mass ratio of 33:0.8: 12.
The EVA emulsion has a VA content of 28% and an MI value of 200. The filler is talcum powder, and the average mesh number is 1500 meshes. The assistant is an organic silicon defoamer with the model of BWF-WB 880. The quaternary ammonium base is tetramethylammonium hydroxide. The melt viscosity (120 ℃) of the oxidized polyethylene wax is 4500mm2(s) the molar mass is 11000.
The preparation method of the environment-friendly hot-melt glue of the embodiment comprises the following steps:
s1: adding the EVA emulsion, the filler, the dimethyl sulfoxide and the water in the formula ratio into a reaction kettle, and uniformly mixing at a stirring speed of 500rpm to obtain a mixed solution;
s2: and (4) adding the tackifier and the auxiliary agent into the mixed solution obtained in the step S1, stirring and mixing at a high speed of 1500rpm, and then vacuumizing to obtain the modified polyvinyl alcohol.
Example 2
The environment-friendly hot-melt glue of the embodiment is prepared from the following raw materials by weight: 35kg of EVA emulsion, 30kg of filler, 0.6kg of dimethyl sulfoxide, 20kg of tackifier, 0.1kg of auxiliary agent and 260kg of water.
Wherein the tackifier consists of acrylic emulsion, quaternary ammonium base and oxidized polyethylene wax according to the mass ratio of 33:0.8: 12.
The EVA emulsion has a VA content of 28% and an MI value of 200. The filler is talcum powder, and the average mesh number is 1500 meshes. The assistant is an organic silicon defoamer with the model of BWF-WB 880. The quaternary ammonium base is tetramethylammonium hydroxide. The melt viscosity (120 ℃) of the oxidized polyethylene wax is 4500mm2(s) the molar mass is 11000.
The preparation method of the environment-friendly hot-melt glue of the embodiment comprises the following steps:
s1: adding the EVA emulsion, the filler, the dimethyl sulfoxide and the water with the formula ratio into a reaction kettle, and uniformly mixing at a stirring speed of 700rpm to obtain a mixed solution;
s2: and (4) adding the tackifier and the auxiliary agent into the mixed solution obtained in the step S1, stirring and mixing at a high speed of 1800rpm, and then vacuumizing to obtain the modified polyvinyl alcohol.
Example 3
The environment-friendly hot-melt glue of the embodiment is prepared from the following raw materials by weight: 30kg of EVA emulsion, 25kg of filler, 0.55kg of dimethyl sulfoxide, 18kg of tackifier, 0.065kg of auxiliary agent and 220kg of water.
Wherein the tackifier consists of acrylic emulsion, quaternary ammonium base and oxidized polyethylene wax according to the mass ratio of 33:0.8: 12.
The EVA emulsion has a VA content of 28% and an MI value of 200. The filler is talcum powder, and the average mesh number is 1500 meshes. The assistant is an organic silicon defoamer with the model of BWF-WB 880. The quaternary ammonium base is tetramethylammonium hydroxide. The melt viscosity (120 ℃) of the oxidized polyethylene wax is 4500mm2(s) the molar mass is 11000.
The preparation method of the environment-friendly hot-melt glue of the embodiment comprises the following steps:
s1: adding the EVA emulsion, the filler, the dimethyl sulfoxide and the water with the formula ratio into a reaction kettle, and uniformly mixing at a stirring speed of 600rpm to obtain a mixed solution;
s2: and (4) adding the tackifier and the auxiliary agent into the mixed solution obtained in the step S1, stirring and mixing at a high speed of 1650rpm, and then vacuumizing to obtain the adhesive.
Example 4
The environment-friendly hot-melt glue of the embodiment is different from the environment-friendly hot-melt glue of the embodiment 3 in that: the oxidized polyethylene wax in the tackifier is subjected to glycidyl methacrylate graft modification, and the rest is the same as that in the example 3.
The oxidized polyethylene wax graft modification treatment method of the embodiment comprises the following steps:
1) adding 1kg of oxidized polyethylene wax, 120g of glycidyl methacrylate and 75g of styrene into a reaction vessel, uniformly mixing, and heating to 170 ℃ to obtain a reaction solution;
2) adding 10g of dicumyl peroxide into the reaction solution obtained in the step 1), reacting for 15min under continuous stirring, adding acetone for purification, filtering and drying to obtain the dicumyl peroxide.
Wherein, the grafting rate of the oxidized polyethylene wax is 8 percent.
The preparation method of the environment-friendly hot-melt glue of the embodiment is the same as that of the embodiment 3.
Example 5
The environment-friendly hot-melt glue of the embodiment is different from the environment-friendly hot-melt glue of the embodiment 3 in that: the oxidized polyethylene wax in the tackifier is subjected to glycidyl methacrylate graft modification, and the rest is the same as that in the example 3.
The oxidized polyethylene wax graft modification treatment method of the embodiment comprises the following steps:
1) adding 1kg of oxidized polyethylene wax, 120g of glycidyl methacrylate and 75g of styrene into a reaction vessel, uniformly mixing, and heating to 170 ℃ to obtain a reaction solution;
2) adding 10g of dicumyl peroxide into the reaction solution obtained in the step 1), reacting for 15min under continuous stirring, adding acetone for purification, filtering and drying to obtain the dicumyl peroxide.
Wherein, the grafting rate of the oxidized polyethylene wax is 1.5 percent.
The preparation method of the environment-friendly hot-melt glue of the embodiment is the same as that of the embodiment 3.
Example 6
The difference between the environment-friendly hot-melt glue of the embodiment and the embodiment 5 is that: the graft ratio of the oxidized polyethylene wax was 3.5%, and the rest was the same as in example 5.
The oxidized polyethylene wax graft modification treatment method of this example is the same as that of example 5.
The preparation method of the environment-friendly hot-melt glue of the embodiment is the same as that of the embodiment 5.
Example 7
The difference between the environment-friendly hot-melt glue of the embodiment and the embodiment 5 is that: the graft ratio of the oxidized polyethylene wax was 5%, and the rest was the same as in example 5.
The oxidized polyethylene wax graft modification treatment method of this example is the same as that of example 5.
The preparation method of the environment-friendly hot-melt glue of the embodiment is the same as that of the embodiment 5.
Example 8
The environment-friendly hot-melt glue of the embodiment is different from the environment-friendly hot-melt glue of the embodiment 6 in that: the quaternary ammonium base in the adhesion promoter was tetrapropylammonium hydroxide, the rest being the same as in example 6.
The oxidized polyethylene wax graft modification treatment method of this example was the same as that of example 6.
The preparation method of the environment-friendly hot-melt glue of the embodiment is the same as that of the embodiment 6.
Example 9
The environment-friendly hot-melt glue of the embodiment is different from the environment-friendly hot-melt glue of the embodiment 6 in that: the quaternary ammonium base in the adhesion promoter was trimethyl ethyl ammonium hydroxide, the rest being the same as in example 6.
The oxidized polyethylene wax graft modification treatment method of this example was the same as that of example 6.
The preparation method of the environment-friendly hot-melt glue of the embodiment is the same as that of the embodiment 6.
Example 10
The environment-friendly hot-melt glue of the embodiment is different from the environment-friendly hot-melt glue of the embodiment 6 in that: the quaternary ammonium base in the adhesion promoter was tetrabutylammonium hydroxide, the rest being the same as in example 6.
The oxidized polyethylene wax graft modification treatment method of this example was the same as that of example 6.
The preparation method of the environment-friendly hot-melt glue of the embodiment is the same as that of the embodiment 6.
Example 11
The difference between the environment-friendly hot-melt glue of the present embodiment and embodiment 10 is that: the EVA emulsion is composed of high vinyl acetate content EVA emulsion and low vinyl acetate content EVA emulsion according to the mass ratio of 3:22, and the rest is the same as the example 10.
Wherein, the VA content in the EVA emulsion with high vinyl acetate content is 35 percent, and the VA content in the EVA emulsion with low vinyl acetate content is 18 percent.
The oxidized polyethylene wax graft modification treatment method of this example is the same as that of example 10.
The preparation method of the environment-friendly hot-melt glue of the embodiment is the same as that of the embodiment 10.
Example 12
The difference between the environment-friendly hot-melt glue of the present embodiment and embodiment 10 is that: the EVA emulsion is composed of high vinyl acetate content EVA emulsion and low vinyl acetate content EVA emulsion according to the mass ratio of 7:35, and the rest is the same as the example 10.
Wherein, the VA content in the EVA emulsion with high vinyl acetate content is 35 percent, and the VA content in the EVA emulsion with low vinyl acetate content is 18 percent.
The oxidized polyethylene wax graft modification treatment method of this example is the same as that of example 10.
The preparation method of the environment-friendly hot-melt glue of the embodiment is the same as that of the embodiment 10.
Example 13
The difference between the environment-friendly hot-melt glue of the present embodiment and embodiment 10 is that: the EVA emulsion is composed of high vinyl acetate content EVA emulsion and low vinyl acetate content EVA emulsion according to the mass ratio of 7:35, and the rest is the same as the example 10.
Wherein, the VA content in the EVA emulsion with high vinyl acetate content is 40 percent, and the VA content in the EVA emulsion with low vinyl acetate content is 20 percent.
The oxidized polyethylene wax graft modification treatment method of this example is the same as that of example 10.
The preparation method of the environment-friendly hot-melt glue of the embodiment is the same as that of the embodiment 10.
Example 14
The environment-friendly hot-melt glue of the present embodiment is different from embodiment 11 in that: the raw materials of the environment-friendly hot-melt glue also comprise 0.5kg of azobisisobutyronitrile, and the rest is the same as that of the embodiment 11.
The oxidized polyethylene wax graft modification treatment method of this example was the same as that of example 11.
The preparation method of the environment-friendly hot-melt glue of the embodiment comprises the following steps:
s1: adding the EVA emulsion, the filler, the dimethyl sulfoxide and the water with the formula ratio into a reaction kettle, and uniformly mixing at a stirring speed of 600rpm to obtain a mixed solution;
s2: and (4) adding the tackifier, the auxiliary agent and the azobisisobutyronitrile into the mixed solution obtained in the step S1, stirring and mixing at a high speed of 1650rpm, and then vacuumizing to obtain the adhesive.
Example 15
The environment-friendly hot-melt glue of the present embodiment is different from embodiment 11 in that: the raw materials of the environment-friendly hot-melt glue also comprise 0.8kg of azobisisobutyronitrile, and the rest is the same as that of the embodiment 11.
The oxidized polyethylene wax graft modification treatment method of this example was the same as that of example 11.
The preparation method of the environment-friendly hot-melt glue of the embodiment comprises the following steps:
s1: adding the EVA emulsion, the filler, the dimethyl sulfoxide and the water with the formula ratio into a reaction kettle, and uniformly mixing at a stirring speed of 600rpm to obtain a mixed solution;
s2: and (4) adding the tackifier, the auxiliary agent and the azobisisobutyronitrile into the mixed solution obtained in the step S1, stirring and mixing at a high speed of 1650rpm, and then vacuumizing to obtain the adhesive.
Comparative example
Comparative example 1
The environment-friendly hot-melt glue of the comparative example is prepared from the following raw materials in parts by weight: 40kg of EVA emulsion, 15kg of filler, 0.2kg of dimethyl sulfoxide, 8kg of tackifier, 0.03kg of auxiliary agent and 100kg of water.
The preparation method of the environment-friendly hot-melt glue of the comparative example is the same as that of the example 1.
Comparative example 2
The environment-friendly hot-melt glue of the comparative example is different from the glue of the example 1 in that: the tackifier in the raw material was replaced by an equal mass of rosin emulsion, and the rest was the same as in example 1.
The preparation method of the environment-friendly hot-melt glue of the comparative example is the same as that of the example 1.
Comparative example 3
The environment-friendly hot-melt glue of the comparative example is different from the glue of the example 1 in that: the tackifier in the raw materials consists of acrylic emulsion and quaternary ammonium base according to the mass ratio of 33:0.8, and the rest is the same as that in the embodiment 1.
The preparation method of the environment-friendly hot-melt glue of the comparative example is the same as that of the example 1.
Comparative example 4
The environment-friendly hot-melt glue of the comparative example is different from the glue of the example 1 in that: the tackifier in the raw materials consists of acrylic emulsion and oxidized polyethylene according to the mass ratio of 33:12, and the rest is the same as that in the example 1.
The preparation method of the environment-friendly hot-melt glue of the comparative example is the same as that of the example 1.
Comparative example 5
The environment-friendly hot-melt glue of the comparative example is different from the glue of the example 1 in that: the tackifier in the raw materials consists of quaternary ammonium hydroxide and oxidized polyethylene according to the mass ratio of 0.8:12, and the rest is the same as that in the example 1.
The preparation method of the environment-friendly hot-melt glue of the comparative example is the same as that of the example 1.
Comparative example 6
The environmental-friendly hot-melt glue of the comparative example is different from the glue of the example 10 in that: the EVA emulsion is composed of high vinyl acetate content EVA emulsion and low vinyl acetate content EVA emulsion according to the mass ratio of 10:16, and the rest is the same as the example 10.
Wherein, the VA content in the EVA emulsion with high vinyl acetate content is 35 percent, and the VA content in the EVA emulsion with low vinyl acetate content is 18 percent.
The oxidized polyethylene wax graft modification treatment method of this comparative example was the same as that of example 10.
The preparation method of the environment-friendly hot-melt glue of the comparative example is the same as that of the example 10.
Performance test
Detection method
The environmental-friendly hot-melt glue of the examples 1 to 15 and the comparative examples 1 to 6 is used for testing the basic performance according to the standard HG/T3698-; the peel strength was tested according to GB/T2791-1995 "test method for T-Peel Strength of adhesive", and the results of the comprehensive tests are shown in Table 1.
TABLE 1 data of the comprehensive performance test of the environmentally friendly hot melt glues of examples 1 to 15 and comparative examples 1 to 6
Analyzing examples 1-3 and comparative example 1 in combination with table 1, it can be seen that optimizing and adjusting the composition ratio of the environment-friendly hot-melt glue optimizes the composition ratio of the environment-friendly hot-melt glue to obtain a more balanced composition ratio, and it can be seen that the glue prepared according to the raw material composition of example 3 has the best tensile strength and peel strength.
By analyzing examples 1-3, comparative examples 2-5 and in combination with Table 1, it can be seen that the stability of the glue decreases dramatically after the use of the common commercial tackifier in comparative example 2, and scorching occurs during the thermal stability test. In contrast, in comparative example 3, when the acrylic emulsion and the quaternary ammonium base are compounded for use, the tensile strength is reduced by 26.8% and the peel strength is reduced by 32.7% although the stability of the glue is greatly improved. In the comparative example 4, when the acrylic emulsion and the oxidized polyethylene are compounded for use, the adhesive property of the glue is improved, but the stability is reduced a lot, and the phenomenon of blackening occurs. In comparative example 5, quaternary ammonium hydroxide and oxidized polyethylene are selected for compounding, so that the stability is good, and the bonding performance is improved compared with that in comparative example 3. In combination, when the acrylic emulsion, the quaternary ammonium hydroxide and the oxidized polyethylene wax are selected for compounding, the adhesive property of the glue is improved, better stability is obtained, and the weather resistance of the glue is improved.
Analysis of examples 3, 4-5, and 6-7 in combination with Table 1 shows that the oxidized polyethylene wax was graft-modified with glycidyl methacrylate and the graft ratio of the oxidized polyethylene wax was adjusted and optimized, and that when the graft ratio was selected to be 5%, the tensile strength of the glue reached 3.55MPa and the peel strength was increased to 11.83 N.25 mm-1(180 ℃) whereas, when the graft ratio was increased to 8%, the tensile strength was decreased by 3.5%.
Analysis of examples 1-3, examples 8-10 in combination with Table 1 shows that testing and optimization of different types of quaternary ammonium bases further improves the cross-linked bonding of cohesive systems, and that the peel and tensile strength of the glue is better when tetrabutylammonium hydroxide is used as the quaternary ammonium base, probably due to better hydroxyl activity in the tetrabutylammonium hydroxide molecule and moderate steric hindrance of the overall molecular structure, resulting in better adhesion of the glue.
By analyzing the example 11, the example 12, the example 13 and the comparative example 6 and combining the table 1, it can be seen that the content and the composition ratio of VA in the EVA emulsion are optimized and adjusted, the state of the cohesive system is further improved, and the adhesive property of the glue is improved.
It can be seen from the analysis of examples 14-15 and the combination of Table 1 that, after adding azobisisobutyronitrile to the glue, the cross-linking bonding state of the cohesive system is further improved, and the tensile strength and peel strength of the glue are better.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The environment-friendly hot melt glue is characterized by being mainly prepared from the following raw materials in parts by weight: 22-35 parts of EVA emulsion, 18-30 parts of filler, 0.35-0.6 part of dimethyl sulfoxide, 10-20 parts of tackifier, 0.05-0.1 part of assistant and 260 parts of water 120-; the tackifier consists of acrylic emulsion, quaternary ammonium base and oxidized polyethylene wax according to the mass ratio of (33-40) to (0.8-1.5) to (12-25).
2. The environment-friendly hot melt glue according to claim 1, wherein the oxidized polyethylene wax is subjected to grafting modification treatment with glycidyl methacrylate.
3. The environment-friendly hot melt glue according to claim 2, wherein the grafting ratio of the oxidized polyethylene wax is 3.5-5%.
4. The environment-friendly hot melt glue according to claim 1, wherein the quaternary ammonium hydroxide is one of tetramethylammonium hydroxide, trimethylethylammonium hydroxide and tetrabutylammonium hydroxide.
5. The environment-friendly hot melt glue as claimed in claim 1, wherein the EVA emulsion is composed of (3-7) and (22-35) EVA emulsions with high and low vinyl acetate contents by mass ratio.
6. The environment-friendly hot melt glue according to claim 1, wherein the mass ratio of the tackifier to the EVA emulsion is (0.45-0.6): 1.
7. The environment-friendly hot melt glue according to claim 1, wherein the raw materials further comprise 0.5-0.8 parts by weight of azobisisobutyronitrile.
8. A method for preparing environment-friendly hot melt glue according to any one of claims 1 to 6, characterized by comprising the following steps:
s1: uniformly mixing the EVA emulsion, the filler, dimethyl sulfoxide and water according to the formula ratio to obtain a mixed solution;
s2: and (4) adding the tackifier and the auxiliary agent into the mixed liquid obtained in the step S1, and stirring and mixing at a high speed to obtain the adhesive.
9. The method for preparing an environment-friendly hot melt glue according to claim 8, wherein step S2 further includes a step of adding azobisisobutyronitrile.
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| CN202111605976.8A CN114181645B (en) | 2021-12-25 | 2021-12-25 | Environment-friendly hot-melt glue and preparation method thereof |
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| CN202111605976.8A CN114181645B (en) | 2021-12-25 | 2021-12-25 | Environment-friendly hot-melt glue and preparation method thereof |
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| CN114181645A true CN114181645A (en) | 2022-03-15 |
| CN114181645B CN114181645B (en) | 2023-02-03 |
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| CN202111605976.8A Active CN114181645B (en) | 2021-12-25 | 2021-12-25 | Environment-friendly hot-melt glue and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10130436A (en) * | 1996-10-30 | 1998-05-19 | Nippon Unicar Co Ltd | Hot-melt composition |
| CN101358113A (en) * | 2008-05-06 | 2009-02-04 | 上海爱世博有机硅材料有限公司 | Water-soluble hot-melt adhesive glue |
| WO2015184819A1 (en) * | 2014-06-04 | 2015-12-10 | 福州大学 | Eva hot-melt adhesive material and method for preparation thereof |
| CN107841263A (en) * | 2017-11-15 | 2018-03-27 | 四川科立鑫新材料有限公司 | A kind of water-soluble hot-melt adhesive glue |
-
2021
- 2021-12-25 CN CN202111605976.8A patent/CN114181645B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10130436A (en) * | 1996-10-30 | 1998-05-19 | Nippon Unicar Co Ltd | Hot-melt composition |
| CN101358113A (en) * | 2008-05-06 | 2009-02-04 | 上海爱世博有机硅材料有限公司 | Water-soluble hot-melt adhesive glue |
| WO2015184819A1 (en) * | 2014-06-04 | 2015-12-10 | 福州大学 | Eva hot-melt adhesive material and method for preparation thereof |
| CN107841263A (en) * | 2017-11-15 | 2018-03-27 | 四川科立鑫新材料有限公司 | A kind of water-soluble hot-melt adhesive glue |
Non-Patent Citations (2)
| Title |
|---|
| 张铁成: "《最新新型工程材料生产新技术应用与新产品开发研制及行业技术标准实用大全 1 涂料与胶粘剂卷》", 30 November 2004 * |
| 杨明山等: "《塑料改性实用技术与应用》", 30 June 2014 * |
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|---|---|
| CN114181645B (en) | 2023-02-03 |
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