Water-based adhesive as well as preparation method and application thereof

Abstract

The invention discloses a water-based adhesive as well as a preparation method and application thereof, and the preparation method comprises the following steps: uniformly mixing deionized water, styrene, butadiene, an acrylate monomer, a cross-linking agent and an emulsifier to prepare a prepolymer; mixing a functional monomer, a plasticizer and the prepolymer to prepare a material A; heating to 50-70 DEG C, adding an initiator into the material A, mixing, reacting for 5-7 hours, and keeping the temperature for 1-2 hours after the reaction is finished; cooling to 30 DEG C, and regulating the pH value of the system to 5-8 by adopting an alkaline substance, so as to obtain the water-based adhesive; and the functional monomer is diene vinyl amide or epoxy vinyl amide. Through the functional monomer and the additive, the crosslinking degree of the polymer is improved, so that the carpet gum has stronger cluster pulling force, water resistance, wear resistance and chemical resistance. Compared with the prior art, fibers of the carpet can be better fixed, the situation that tufts fall off is reduced, corrosion of chemical substances can be better resisted, and the service life of the carpet is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of adhesives, and in particular relates to a water-based adhesive and a preparation method and application thereof. Background Art

[0002] Carpet adhesive is an adhesive used to secure carpets to floors. Traditionally, solvent-based adhesives have been used, but these release volatile, hazardous substances during use, potentially polluting the environment. Consequently, with growing environmental awareness, water-based adhesives are gaining popularity.

[0003] Currently, studies have proposed the use of water-based adhesives as a solution for carpet adhesives. These water-based adhesives are mainly composed of polymers, solvents, and additives, among which polymers are the key components that provide adhesion properties. In order to improve the performance of carpet adhesives, researchers have tried to add different additives, such as thickeners, water-repellents, and antioxidants, to improve the characteristics of carpet adhesives. However, existing water-based adhesives for carpet adhesives still have some problems. First, the tuft pull-out force of water-based adhesives is weak, which may cause the carpet to warp and loosen during use. Second, water-based adhesives are not water-resistant and are easily affected by moisture and mold. In addition, due to the insufficient degree of cross-linking of the polymer, the wear resistance and durability of the adhesive need to be further improved. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a water-based adhesive, a raw material composition thereof, and a preparation method and application thereof.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] In one aspect, the present invention provides a method for preparing a water-based adhesive, which specifically comprises the following steps:

[0007] (1) uniformly mixing deionized water, styrene, butadiene, acrylic ester monomer, crosslinking agent and emulsifier to prepare a prepolymer;

[0008] (2) mixing a functional monomer, a plasticizer and the prepolymer to prepare material A;

[0009] (3) Raising the temperature to 50-70° C., adding the initiator to the material A, mixing, and reacting for 5-7 hours. After the reaction is complete, keeping the temperature for 1-2 hours;

[0010] (4) cooling to 30° C., and adjusting the pH value of the system to 5 to 8 using an alkaline substance to obtain the water-based adhesive;

[0011] The functional monomer is diene vinylamide or epoxy vinylamide.

[0012] In step (1) and step (2), the mixing can be conventional in the art, generally a stirring operation.

[0013] In step (3), the preferred time is 1 to 2 hours.

[0014] As a further embodiment of the present invention, the functional monomer is diene vinylamide.

[0015] As a further embodiment of the present invention: the cross-linking agent is at least one of diisocyanate, diphenylmethane diisocyanate, naphthalene 1,5-diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylenediisocyanate, and tetramethyl-m-xylylenediisocyanate; preferably, the cross-linking agent is diisocyanate.

[0016] As a further embodiment of the present invention, the emulsifier is an anionic emulsifier selected from at least one of sodium alkyl sulfate, sodium alkyl sulfonate, sodium alkylbenzene sulfonate, sodium alkyl diphenyl ether disulfonate, alkylphenol ether ammonium sulfate, and sodium alkylphenol ether sulfosuccinate; wherein the alkyl group is preferably a C8-C18 alkyl group, more preferably a C8-C16 alkyl group, and most preferably at least one of sodium C8-C14 alkyl sulfate, sodium C8-C14 alkyl sulfonate, sodium C8-C14 alkylbenzene sulfonate, sodium C8-C14 alkyl diphenyl ether disulfonate, C8-C14 alkylphenol ether ammonium sulfate, and sodium C8-C14 alkylphenol ether sulfosuccinate.

[0017] As a further embodiment of the present invention, the emulsifier is at least one of sodium lauryl sulfate, sodium lauryl sulfonate, sodium dodecylbenzenesulfonate, sodium dodecyl diphenyl ether disulfonate, ammonium dodecylphenol ether sulfate, and sodium dodecylphenol ether sulfosuccinate.

[0018] As a further embodiment of the present invention: the acrylic acid ester monomer is at least one of methyl acrylate, ethyl acrylate, 2-methyl methacrylate and 2-ethyl methacrylate; preferably, the acrylic acid ester monomer is 2-methyl methacrylate.

[0019] As a further embodiment of the present invention, the initiator is selected from at least one of sodium persulfate, ammonium persulfate, potassium persulfate, tert-butyl hydroperoxide, cumene hydroperoxide, pinane hydroperoxide, azobisisobutyronitrile, and azobisisoheptanenitrile; preferably, the initiator is cumene hydroperoxide;

[0020] And / or, the plasticizer is at least one of diethylhexyl adipate, diisodecyl adipate, and diethylhexyl azelate;

[0021] And / or, the alkaline substance is selected from alkali metal hydroxides.

[0022] As a further embodiment of the present invention, the weight proportions of the components are as follows:

[0023] 0.5-2 parts of emulsifier, 0.8-2.5 parts of initiator, 5-15 parts of functional monomer, 0.5-2 parts of crosslinking agent, 2-10 parts of acrylate monomer, 10-20 parts of styrene, 15-25 parts of butadiene, 2-5 parts of plasticizer, 80-100 parts of deionized water.

[0024] The second aspect of the present invention provides a water-based adhesive, which is prepared by the above-mentioned method for preparing the water-based adhesive.

[0025] The third aspect of the present invention provides the use of the water-based adhesive in carpets.

[0026] The beneficial effects of the present invention are:

[0027] This invention incorporates new functional monomers and crosslinking agents. These two substances, when used synergistically in a specific ratio, react to form long-chain hydrophobic urea-based polymers. This increases the degree of crosslinking in the polymer, resulting in carpet adhesives with enhanced tufting strength, water resistance, abrasion resistance, and chemical resistance. Compared to existing technologies, this invention can better secure carpet fibers, reduce tuft shedding, and further improve carpet quality. Furthermore, this invention makes the carpet stronger, more wear-resistant, and more durable, offering improved resistance to chemical corrosion, thereby extending the carpet's service life. DETAILED DESCRIPTION

[0028] The present invention is further illustrated by way of examples below, but the invention is not limited to the scope of the examples. Experimental methods in the following examples where specific conditions are not specified were performed according to conventional methods and conditions, or selected according to the product specifications. In addition, the reagents and raw materials used in the present invention are all commercially available.

[0029] Example 1

[0030] A water-based adhesive is prepared from the following components in mass, see Table 1;

[0031] Table 1

[0032] Specific compounds Mass (g) Deionized water 95 Styrene 15 Butadiene 23 Acrylate monomer: 2-methyl methacrylate 4 Crosslinking agent: diisocyanate 0.5 Emulsifier: sodium lauryl sulfate 2 Functional monomer: Divinyl vinyl amide 7 Plasticizer: Diethylhexyl adipate 3 Initiator: Cumene hydroperoxide 0.8

[0033] The preparation method comprises the following steps:

[0034] (1) adding deionized water, styrene, butadiene, acrylic acid ester monomer, crosslinking agent and emulsifier into a reaction vessel in proportion and stirring uniformly to form a prepolymer;

[0035] (2) gradually adding the functional monomer and plasticizer to the prepolymer while stirring evenly;

[0036] (3) Raise the temperature to 70°C, gradually add the initiator into the reaction vessel, continue stirring evenly, react for 5 hours, keep warm for 2 hours after the reaction is completed, cool to 30°C, and add sodium hydroxide to adjust the pH value of the adhesive to 5-8 to form a water-based adhesive.

[0037] Example 2

[0038] A water-based adhesive is prepared from the following components in mass, see Table 2:

[0039] Table 2

[0040]

[0041]

[0042] The preparation method comprises the following steps:

[0043] (1) adding deionized water, styrene, butadiene, acrylic acid ester monomer, crosslinking agent and emulsifier into a reaction vessel in proportion and stirring uniformly to form a prepolymer;

[0044] (2) gradually adding the functional monomer and plasticizer to the prepolymer while stirring evenly;

[0045] (3) Raise the temperature to 70°C, gradually add the initiator into the reaction vessel, continue stirring evenly, and react for 7 hours. After the reaction is completed, keep warm for 1 hour. After the insulation is completed, cool to 30°C, and add alkaline substances to adjust the pH value of the adhesive to 5-8 to form a water-based adhesive.

[0046] Example 3

[0047] A water-based adhesive is prepared from the following components in mass, see Table 3;

[0048] Table 3

[0049]

[0050]

[0051] The preparation method comprises the following steps:

[0052] (1) adding deionized water, styrene, butadiene, acrylic acid ester monomer, crosslinking agent and emulsifier into a reaction vessel in proportion and stirring uniformly to form a prepolymer;

[0053] (2) gradually adding the functional monomer and plasticizer to the prepolymer while stirring evenly;

[0054] (3) Raise the temperature to 70°C, gradually add the initiator into the reaction vessel, continue stirring evenly, react for 6 hours, and keep warm for 1.5 hours after the reaction is completed. After the insulation is completed, cool to 30°C and add alkaline substances to adjust the pH value of the adhesive to 5-8 to form a water-based adhesive.

[0055] Comparative Example 1

[0056] The only difference from Example 1 is that in step (3), no heat preservation operation is performed after the reaction is completed.

[0057] Comparative Example 2

[0058] The only difference from Example 1 is that the reaction temperature in step (3) is 80°C.

[0059] Comparative Example 3

[0060] The only difference from Example 1 is that the amount of the functional monomer is different, and the amount of diene vinylamide used is 20 g.

[0061] Comparative Example 4

[0062] The only difference from Example 1 is that the functional monomer is different, and diene vinylamide is replaced by acrylamide.

[0063] Comparative Example 5

[0064] The only difference from Example 1 is that no cross-linking agent is used.

[0065] Comparative Example 6

[0066] The only difference from Example 1 is that the emulsifier is different, and sodium lauryl sulfate is replaced by polyoxyethylene alkyl ether.

[0067] Comparative Example 7

[0068] The only difference from Example 1 is that the plasticizer is different, and diethylhexyl adipate is replaced by phthalate.

[0069] Comparative Example 8

[0070] Commercially available product, water-based adhesive model 2805 produced by Gujia Building Materials Company.

[0071] Effect embodiment

[0072] The products prepared in Examples 1 to 3 and Comparative Examples 1 to 8 of the present application were coated on the back of a carpet and subjected to an application performance test. The test standards or methods are as follows:

[0073] 1. Determination of tuft pull-out force: Determined according to standard QB / T 1090-2019.

[0074] 2. Water resistance test: Test according to GB / T 4744-1997.

[0075] 3. Abrasion resistance test: Tested in accordance with GB / T 8427-2019.

[0076] 4. Chemical resistance: Determined in accordance with GB / T 37843-2019.

[0077] The products prepared in Examples 1 to 3 and Comparative Examples 1 to 8 of the present application were subjected to application performance tests, and the test results are shown in Table 4.

[0078] Table 4

[0079]

[0080] Due to the advanced nature of this technical solution, it can be widely used in application fields such as carpet manufacturing, home decoration, and hotel interior decoration.

[0081] In the field of carpet manufacturing, the water-based adhesive of the present invention can improve the pulling force and water resistance of carpet backing adhesive, making the carpet backing adhesive stronger and more durable. Carpet manufacturers can use this adhesive to produce high-quality carpets that meet consumer demand for carpet quality.

[0082] In the field of home decoration, the water-based adhesive of this invention can be used for carpet installation, providing better bonding and water resistance, ensuring that the carpet is securely installed and not susceptible to moisture. Consumers can choose to use this adhesive to decorate their homes and enjoy a more comfortable and long-lasting carpet experience.

[0083] In the field of hotel interior decoration, the pull-out strength and water resistance of carpet adhesive are extremely important. Hotels need to select high-quality carpets to meet the needs of a large number of guests. The water-based adhesive of the present invention can provide excellent carpet quality, making hotel interior decoration more durable and beautiful, and meeting guests' demand for a high-quality environment.

[0084] In summary, the water-based adhesive of this invention has broad application prospects in carpet manufacturing, home decoration, hotel interior decoration, and other fields. As people's demands for quality and comfort increase, the performance requirements for carpet adhesives are also becoming increasingly higher. This technical solution will meet the market demand for high-quality carpet adhesives and has a promising market prospect.

[0085] Finally, it should be noted that in the present invention, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0086] Although the present disclosure has been disclosed above through the description of the specific embodiments of the present disclosure, it should be understood that those skilled in the art may design various modifications, improvements or equivalents of the present disclosure within the spirit and scope of the attached solutions. Such modifications, improvements or equivalents should also be considered to be included in the scope of protection claimed by the present disclosure.

Claims

1. A method for preparing a water-based adhesive, characterized in that: The specific steps include: (1) uniformly mixing deionized water, styrene, butadiene, acrylic ester monomer, crosslinking agent and emulsifier to prepare a prepolymer; (2) mixing a functional monomer, a plasticizer and the prepolymer to prepare material A; (3) Raising the temperature to 50-70° C., adding the initiator to the material A, mixing, and reacting for 5-7 hours. After the reaction is complete, keeping the temperature for 1-2 hours; (4) cooling to 30° C., and adjusting the pH value of the system to 5 to 8 using an alkaline substance to obtain the water-based adhesive; The functional monomer is diene vinylamide or epoxy vinylamide.

2. The method for preparing the water-based adhesive according to claim 1, wherein The functional monomer is diene vinyl amide.

3. The method for preparing the water-based adhesive according to claim 1, wherein The crosslinking agent is at least one of diisocyanate, diphenylmethane diisocyanate, naphthalene 1,5-diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylenediisocyanate, and tetramethyl-m-xylylenediisocyanate; preferably, the crosslinking agent is diisocyanate.

4. The method for preparing the water-based adhesive according to claim 1, wherein The emulsifier is an anionic emulsifier, selected from at least one of sodium alkyl sulfate, sodium alkyl sulfonate, sodium alkylbenzene sulfonate, sodium alkyl diphenyl ether disulfonate, alkylphenol ether ammonium sulfate, and sodium salt of alkylphenol ether sulfosuccinate; wherein the alkyl group is preferably a C8-C18 alkyl group, more preferably a C8-C16 alkyl group, and most preferably at least one of sodium C8-C14 alkyl sulfate, sodium C8-C14 alkyl sulfonate, sodium C8-C14 alkylbenzene sulfonate, sodium C8-C14 alkyl diphenyl ether disulfonate, C8-C14 alkylphenol ether ammonium sulfate, and sodium C8-C14 alkylphenol ether sulfosuccinate.

5. The method for preparing the water-based adhesive according to claim 4, wherein: The emulsifier is at least one of sodium lauryl sulfate, sodium lauryl sulfonate, sodium dodecylbenzenesulfonate, sodium dodecyl diphenyl ether disulfonate, ammonium dodecylphenol ether sulfate, and sodium dodecylphenol ether sulfosuccinate.

6. The method for preparing the water-based adhesive according to claim 1, wherein: The acrylic acid ester monomer is at least one of methyl acrylate, ethyl acrylate, 2-methyl methacrylate and 2-ethyl methacrylate; preferably, the acrylic acid ester monomer is 2-methyl methacrylate.

7. The method for preparing the water-based adhesive according to claim 1, wherein: The initiator is selected from at least one of sodium persulfate, ammonium persulfate, potassium persulfate, tert-butyl hydroperoxide, cumene hydroperoxide, pinane hydroperoxide, azobisisobutyronitrile, and azobisisoheptanenitrile; preferably, the initiator is cumene hydroperoxide; And / or, the plasticizer is at least one of diethylhexyl adipate, diisodecyl adipate, and diethylhexyl azelate; And / or, the alkaline substance is selected from alkali metal hydroxides.

8. The method for preparing the water-based adhesive according to claim 1, wherein: The parts by weight of each component are as follows: 0.5-2 parts of emulsifier, 0.8-2.5 parts of initiator, 5-15 parts of functional monomer, 0.5-2 parts of crosslinking agent, 2-10 parts of acrylate monomer, 10-20 parts of styrene, 15-25 parts of butadiene, 2-5 parts of plasticizer, 80-100 parts of deionized water.

9. A water-based adhesive, characterized in that: The aqueous adhesive is prepared by the preparation method of the aqueous adhesive according to any one of claims 1 to 8.

10. Use of the water-based adhesive according to claim 9 in carpets.

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