PVC floor glue for non-absorbent base and preparation method thereof

Abstract

The technical field of water-based adhesives of the present invention specifically relates to a PVC floor adhesive for non-absorbent base layers and a preparation method thereof. The raw materials of the PVC floor adhesive include, by weight, 70 to 90 parts of aqueous emulsion, 1 to 5 parts of heat-deblocking curing agent, 5 to 20 parts of viscosity-enhancing emulsion, 0.5 to 3 parts of thickener, 0.1 to 1 part of defoaming agent, 0.2 to 1.0 parts of bactericide, and 0 to 2 parts of pH regulator. The single-component PVC floor adhesive prepared by the compounding of a specific aqueous emulsion and a heat-deblocking curing agent of the present invention is easy to construct, and can increase the cross-linking density between the copolymer molecular chains after a certain amount of hot pressing, improve the cohesive strength and peel strength of the polymer, and greatly improve the temperature resistance and water resistance of the adhesive.

Description

Technical Field

[0001] The present invention relates to the technical field of water-based adhesives, and in particular to a PVC floor adhesive for a non-absorbent base layer and a preparation method thereof. Background Art

[0002] Water-based acrylic emulsion has high peel strength, wide production sources, simple preparation process, fast film-forming speed, high transparency, and excellent adhesion to a variety of substrates. It is increasingly being researched and applied in the fields of adhesives, coatings, leather, building seals, medical polymers and water treatment.

[0003] As people's environmental awareness increases, the demand for emulsion acrylic pressure-sensitive adhesives is increasing. Compared with solvent-based pressure-sensitive adhesives, emulsion acrylic pressure-sensitive adhesives have many advantages such as low cost, safety, low toxicity, easy operation during polymerization, and higher average molecular weight. However, pure acrylic resin emulsion pressure-sensitive adhesives have poor hardness, water resistance, and high temperature resistance due to their linear molecular structure and lack of cross-linking in the molecules. These shortcomings limit their application. For example, in the building materials industry, non-absorbent substrates are easy to debond when pasting PVC floors.

[0004] At present, the market for high-performance pressure-sensitive adhesives with good comprehensiveness is mainly occupied by products from Europe, the United States, and Japan. Although a few research institutions or technology-based enterprises in China claim to have some high-performance water-based pressure-sensitive adhesive technology, there is still a large gap. It is mainly manifested in the instability of large-scale production. The performance cannot reach the comprehensiveness of foreign technology. It can only reach part of foreign technology in a certain aspect, which is suitable for specific regional markets or specific purposes. At present, the research on water-based acrylic pressure-sensitive adhesives in China mainly focuses on the preparation and modification of conventional performance emulsions, and there is also little research on its application process. In the future, high performance will be the hot spot and development trend of water-based acrylic pressure-sensitive adhesive research. Summary of the invention

[0005] In order to solve the above technical problems, the first aspect of the present invention provides a PVC floor glue for non-absorbent base, the raw materials of the PVC floor glue include, by weight, 70-90 parts of aqueous emulsion, 1-5 parts of thermal deblocking curing agent, 5-20 parts of viscosity-enhancing emulsion, 0.5-3 parts of thickener, 0.1-1 parts of defoaming agent, 0.2-1.0 parts of bactericide, and 0-2 parts of pH regulator.

[0006] As a preferred technical solution of the present invention, the solid content of the aqueous emulsion is 30-60wt%.

[0007] As a preferred technical solution of the present invention, the aqueous emulsion is one or more of aqueous polyurethane emulsion, aqueous polyester emulsion, aqueous acrylic emulsion, acrylic modified polyurethane emulsion, and polyurethane modified acrylic emulsion.

[0008] As a preferred technical solution of the present invention, the tackifying emulsion is one or more of terpene phenol resin emulsion, hydrogenated rosin emulsion, esterified rosin emulsion, polymerized rosin emulsion, and rosin acid emulsion.

[0009] As a preferred technical solution of the present invention, the thickener is one or more of hydroxymethyl cellulose, hydroxyethyl cellulose, alkali swellable acrylic emulsion, and polyurethane emulsion thickener.

[0010] As a preferred technical solution of the present invention, the defoamer is at least one of an organosilicon defoamer, a polyether defoamer, a high-carbon alcohol defoamer, and a polyether-modified organosilicon defoamer.

[0011] As a preferred technical solution of the present invention, the fungicide is one or more of methylisothiazolinone, methylchloroisothiazolinone, and 1,2-benzisothiazolin-3-one.

[0012] As a preferred technical solution of the present invention, the pH regulator is one of monoethanolamine, diethanolamine, triethanolamine, sodium hydroxide, potassium hydroxide, ammonia water, and 2-amino-2-methyl-1-propanol.

[0013] As a preferred technical solution of the present invention, the deblocking temperature of the heat-deblocking curing agent is 100-150°C.

[0014] The second aspect of the present invention provides a method for preparing PVC floor glue for non-absorbent base layer, wherein the preparation method of the PVC floor glue comprises: mixing and stirring an aqueous emulsion, a viscosity-enhancing emulsion, a thickener, a bactericide, and a pH adjuster, adding a defoaming agent, mixing and stirring, and then adding a thermal deblocking curing agent, mixing and stirring to obtain the PVC floor glue.

[0015] Beneficial effects:

[0016] 1. The one-component PVC floor adhesive prepared by compounding a specific aqueous emulsion with a heat-deblocking curing agent is easy to construct. After a certain amount of hot pressing, the cross-linking density between the copolymer molecular chains can be increased, the cohesive strength and peel strength of the polymer can be increased, and the temperature resistance and water resistance of the adhesive can be greatly improved.

[0017] 2. A specific tackifying emulsion is added to the present invention, and the applicant has found that controlling the ratio of the tackifying emulsion to the aqueous emulsion can significantly improve the initial adhesion and peel strength of the adhesive;

[0018] 3. Adding appropriate amount of thickener, defoamer, bactericide and pH adjuster in the present invention makes the coating process of PVC floor glue more flexible and more practical;

[0019] 4. The present invention not only eliminates the disadvantage that the foam of the system brought by the thickening emulsion is difficult to remove by selecting a specific defoaming agent, but also makes the system more stable. DETAILED DESCRIPTION

[0020] The content of the present invention can be more easily understood by selecting the following detailed description of the preferred implementation method of the present invention and the embodiments included. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those of ordinary skill in the art to which the present invention belongs. When there is a conflict, the definition in this specification shall prevail.

[0021] As used herein, the term "prepared from" is synonymous with "comprising." As used herein, the terms "comprising," "including," "having," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises the listed elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

[0022] The conjunction "consisting of excludes any unspecified element, step, or component. If used in a claim, this phrase renders the claim closed-ended so that it does not include materials other than those described, except for conventional impurities associated therewith. When the phrase "consisting of" appears in a clause of the body of a claim rather than immediately following the subject matter, it limits only the elements described in that clause; other elements are not excluded from the claim as a whole.

[0023] When amount, concentration or other value or parameter is expressed as range, preferred range or a series of upper preferred value and lower preferred value limit range, this should be understood as specifically disclosing all ranges formed by any pairing of any range upper limit or preferred value and any range lower limit or preferred value, regardless of whether the range is disclosed separately. For example, when disclosing range "1 to 5", described range should be interpreted as including range "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5" etc. When numerical range is described in this article, unless otherwise stated, the range is intended to include its end value and all integers and fractions within the range.

[0024] Singular forms include plural references unless the context clearly indicates otherwise. "Optional" or "either" means that the subsequently described event or incident may or may not occur, and that the description includes instances where the event occurs and instances where it does not.

[0025] Approximate terms in the specification and claims are used to modify quantities, indicating that the present invention is not limited to the specific quantity, but also includes acceptable and modified parts close to the quantity without causing changes in the relevant basic functions. Accordingly, the use of "about", "approximately", etc. to modify a numerical value means that the present invention is not limited to the exact numerical value. In some examples, the approximate terms may correspond to the accuracy of the instrument for measuring the numerical value. In the specification and claims of this application, range limitations can be combined and / or interchanged, and if not otherwise stated, these ranges include all subranges contained therein.

[0026] In order to solve the above technical problems, the first aspect of the present invention provides a PVC floor glue for non-absorbent base, the raw materials of the PVC floor glue include, by weight, 70-90 parts of aqueous emulsion, 1-5 parts of thermal deblocking curing agent, 5-20 parts of viscosity-enhancing emulsion, 0.5-3 parts of thickener, 0.1-1 parts of defoaming agent, 0.2-1.0 parts of bactericide, and 0-2 parts of pH regulator.

[0027] In a preferred embodiment, the raw materials of the PVC floor glue include, by weight, 75-90 parts of aqueous emulsion, 1-3 parts of thermal deblocking curing agent, 4-18 parts of viscosity-enhancing emulsion, 0.8-1.5 parts of thickener, 0.3-0.8 parts of defoaming agent, 0.3-0.8 parts of bactericide, and 0.8-1.5 parts of pH regulator.

[0028] Water-based emulsion

[0029] In one embodiment, the solid content of the aqueous emulsion is 30-60 wt %; more preferably, the solid content of the aqueous emulsion is 45-55 wt %.

[0030] In one embodiment, the aqueous emulsion is one or more of aqueous polyurethane emulsion, aqueous polyester emulsion, aqueous acrylic emulsion, acrylic modified polyurethane emulsion, and polyurethane modified acrylic emulsion.

[0031] In a preferred embodiment, the aqueous emulsion is one or more of aqueous polyurethane emulsion, aqueous acrylic emulsion, polyurethane-modified acrylic emulsion; further preferably, the aqueous emulsion is aqueous polyurethane emulsion or polyurethane-modified acrylic emulsion.

[0032] In one embodiment, the aqueous polyurethane emulsion is Covestro Dispercoll U54.

[0033] In one embodiment, the polyurethane modified acrylic emulsion is Sancure AU-4010.

[0034] The applicant has found that the PVC floor adhesive prepared by using an aqueous polyurethane emulsion or polyurethane modified acrylic emulsion with a solid content of 45-55wt% in the system of the present invention has good peel strength. This may be because the aqueous polyurethane emulsion or polyurethane modified acrylic emulsion with this solid content has high cohesion and better initial adhesion with other components in the system.

[0035] Thickening emulsion

[0036] In one embodiment, the weight ratio of the thickening emulsion to the aqueous emulsion is 1:(5-20); more preferably, the weight ratio of the thickening emulsion to the aqueous emulsion is 1:(6-18).

[0037] In one embodiment, the tackifying emulsion is one or more of a terpene phenol resin emulsion, a hydrogenated rosin emulsion, an esterified rosin emulsion, a polymerized rosin emulsion, and a rosin acid emulsion.

[0038] In a preferred embodiment, the tackifying emulsion is an esterified rosin emulsion and / or a polymerized rosin emulsion; further preferably, the tackifying emulsion is a polymerized rosin emulsion.

[0039] In one embodiment, the softening point of the polymerized rosin emulsion is 30°C to 170°C; more preferably, the softening point of the polymerized rosin emulsion is 90°C to 120°C; more preferably, the softening point of the polymerized rosin emulsion is 100°C.

[0040] In one embodiment, the polymerized rosin emulsion is purchased from Guangxi Feizhuo Guinox 6150.

[0041] The applicant unexpectedly discovered that when a polymerized rosin emulsion with a specific softening point interacts with an aqueous emulsion, when the softening point is too low or too high, the performance of the prepared PVC floor adhesive is not good. This may be because when the softening point of the polymerized rosin emulsion is too low, its viscosity-increasing performance in the system is poor, while when the softening point is too high, the compatibility of the viscosity-increasing emulsion with the system is poor. The applicant also discovered that in the system of the present invention, the weight ratio of the viscosity-increasing emulsion to the aqueous emulsion is preferably between 1: (6 and 18). This may be because the addition of the polymerized rosin emulsion can improve the wettability and initial adhesion of the PVC floor adhesive. However, when the amount of the polymerized rosin emulsion added is too much, the cross-linking density of the system may be reduced, thereby affecting the mechanical properties of the PVC floor adhesive.

[0042] Thickener

[0043] In one embodiment, the thickener is one or more of hydroxymethyl cellulose, hydroxyethyl cellulose, alkali swellable acrylic emulsion, and polyurethane emulsion thickener.

[0044] In a preferred embodiment, the thickener is an alkali-swellable acrylic emulsion and / or a polyurethane emulsion thickener; further preferably, the thickener is a polyurethane emulsion thickener.

[0045] In one embodiment, the polyurethane emulsion thickener is Coapur 830W.

[0046] Defoaming agent

[0047] In one embodiment, the defoamer is at least one of an organosilicon defoamer, a polyether defoamer, a high-carbon alcohol defoamer, and a polyether-modified organosilicon defoamer.

[0048] In a preferred embodiment, the defoamer is a higher alcohol type defoamer.

[0049] In one embodiment, the high-carbon alcohol defoamer is purchased from Fujian Xister Environmental Protection Materials Technology Co., Ltd., model number XST-4930.

[0050] In the present invention, the polymerized rosin in the polymerized rosin emulsion has a certain surface activity and a certain stabilizing effect on the foam. A specific defoamer is added to the system to remove the foam in the system. The applicant has found through extensive research that adding a high-carbon alcohol defoamer to the system can not only remove the foam in the system well, but also reduce the sediment in the system. This may be because the high-carbon alcohol defoamer is easy to mix with the water in the system of the present invention and is green and environmentally friendly.

[0051] The defoaming agent is a silicone defoaming agent, which is purchased from Fujian Xiste Environmental Protection Materials Technology Co., Ltd. and the model is Z-201.

[0052] Fungicides

[0053] In one embodiment, the fungicide is one or more of methylisothiazolinone, methylchloroisothiazolinone, and 1,2-benzisothiazolin-3-one; preferably 1,2-benzisothiazolin-3-one (CAS No.: 2634-33-5).

[0054] pH Adjusters

[0055] In one embodiment, the pH adjuster is one of monoethanolamine, diethanolamine, triethanolamine, sodium hydroxide, potassium hydroxide, ammonia water, and 2-amino-2-methyl-1-propanol (AMP-95); preferably ammonia water.

[0056] Thermal deblocking curing agent

[0057] In one embodiment, the deblocking temperature of the heat-deblocking curing agent is 100-150°C, preferably 100°C.

[0058] In one embodiment, the thermal deblocking curing agent is a hydrophilic aliphatic isocyanate.

[0059] In one embodiment, the aliphatic isocyanate is purchased from Shanghai Siwo Chemical FB-15.

[0060] The second aspect of the present invention provides a method for preparing PVC floor glue for non-absorbent base layer, wherein the preparation method of the PVC floor glue comprises: mixing and stirring an aqueous emulsion, a viscosity-enhancing emulsion, a thickener, a bactericide, and a pH adjuster, adding a defoaming agent, mixing and stirring, and then adding a thermal deblocking curing agent, mixing and stirring to obtain the PVC floor glue.

[0061] In one embodiment, the method for using the PVC floor adhesive is as follows: bonding the PVC floor to a non-absorbent substrate, applying the PVC floor adhesive on both sides, and immediately laminating after the water evaporates and the adhesive film becomes dry, and then hot pressing with a 100° C. heating roller for 2 to 3 minutes and curing for 48 hours.

[0062] The present invention is described in detail below by way of examples. It is necessary to point out here that the following examples are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by professionals and technicians in this field based on the content of the present invention above still belong to the scope of protection of the present invention.

[0063] In addition, if not otherwise stated, all raw materials used were commercially available.

[0064] Example

[0065] Example 1

[0066] Embodiment 1 of the present invention provides a PVC floor adhesive for non-absorbent substrates. The raw materials of the PVC floor adhesive include, by weight, 90 parts of aqueous emulsion, 2 parts of heat-deblocking curing agent, 5 parts of tackifying emulsion, 1 part of thickener, 0.5 parts of defoamer, 0.5 parts of bactericide, and 1 part of pH regulator;

[0067] The solid content of the aqueous emulsion is 50wt%; the aqueous emulsion is an aqueous polyurethane emulsion; the aqueous polyurethane emulsion is Covestro Dispercoll U54;

[0068] The weight ratio of the tackifying emulsion to the aqueous emulsion is 1:18; the tackifying emulsion is a polymerized rosin emulsion; the softening point of the polymerized rosin emulsion is 100° C.; the polymerized rosin emulsion is purchased from Guangxi Feizhuo Guinox 6150;

[0069] The thickener is a polyurethane emulsion thickener; the polyurethane emulsion thickener is Coapur 830W;

[0070] The defoamer is a high-carbon alcohol type defoamer; the high-carbon alcohol type defoamer is purchased from Fujian Xister Environmental Protection Materials Technology Co., Ltd., model number is XST-4930;

[0071] The fungicide is 1,2-benzisothiazolin-3-one (CAS No.: 2634-33-5);

[0072] The pH regulator is aqueous ammonia;

[0073] The unsealing temperature of the heat-unsealing curing agent is 100° C.; the heat-unsealing curing agent is a hydrophilic aliphatic isocyanate; the aliphatic isocyanate is purchased from Shanghai Siwo Chemical FB-15.

[0074] The preparation method of the PVC floor glue is as follows: the aqueous emulsion, the viscosity-enhancing emulsion, the thickener, the bactericide, and the pH value adjuster are mixed and stirred evenly, the defoamer is added and stirred evenly, and then the heat-deblocking curing agent is added and stirred evenly to obtain the PVC floor glue.

[0075] Example 2

[0076] Embodiment 2 of the present invention provides a PVC floor adhesive for non-absorbent substrates. The raw materials of the PVC floor adhesive include, by weight, 80 parts of aqueous emulsion, 2 parts of thermal deblocking curing agent, 15 parts of tackifying emulsion, 1 part of thickener, 0.5 parts of defoamer, 0.5 parts of bactericide, and 1 part of pH regulator;

[0077] The weight ratio of the thickening emulsion to the aqueous emulsion is 1:6;

[0078] The aqueous emulsion, heat-deblocking curing agent, viscosity-enhancing emulsion, thickener, defoamer, bactericide, and pH regulator are the same as those in Example 1;

[0079] The preparation method of the PVC floor adhesive is the same as that of Example 1.

[0080] Example 3

[0081] Example 3 of the present invention provides a PVC floor adhesive for non-absorbent substrates, and its specific implementation is the same as that of Example 1, except that the aqueous emulsion is a polyurethane-modified acrylic emulsion, specifically Sancure AU-4010.

[0082] Example 4

[0083] Example 4 of the present invention provides a PVC floor adhesive for non-absorbent substrates, and its specific implementation is the same as that of Example 2, except that the aqueous emulsion is a polyurethane-modified acrylic emulsion, specifically Sancure AU-4010.

[0084] Example 5

[0085] Example 5 of the present invention provides a PVC floor adhesive for non-absorbent substrates, and its specific implementation is the same as that of Example 1, except that the aqueous emulsion is an aqueous acrylic emulsion, specifically Hanwha Soluryl R-20.

[0086] Example 6

[0087] Example 6 of the present invention provides a PVC floor adhesive for non-absorbent substrates, and its specific implementation is the same as that of Example 2, except that the aqueous emulsion is an aqueous acrylic emulsion, specifically Hanwha Soluryl R-20.

[0088] Example 7

[0089] Embodiment 7 of the present invention provides a PVC floor adhesive for non-absorbent substrates, wherein the raw materials of the PVC floor adhesive include, by weight, 80 parts of aqueous emulsion, 2 parts of heat-deblocking curing agent, 20 parts of tackifying emulsion, 1 part of thickener, 0.5 parts of defoamer, 0.5 parts of bactericide, and 1 part of pH regulator;

[0090] The weight ratio of the thickening emulsion to the aqueous emulsion is 1:4;

[0091] The aqueous emulsion, heat-deblocking curing agent, viscosity-enhancing emulsion, thickener, defoamer, bactericide, and pH regulator are the same as those in Example 1;

[0092] The preparation method of the PVC floor adhesive is the same as that of Example 1.

[0093] Example 8

[0094] Embodiment 8 of the present invention provides a PVC floor adhesive for non-absorbent substrates, wherein the raw materials of the PVC floor adhesive include, by weight, 100 parts of aqueous emulsion, 2 parts of heat-deblocking curing agent, 4 parts of tackifying emulsion, 1 part of thickener, 0.5 parts of defoaming agent, 0.5 parts of bactericide, and 1 part of pH regulator;

[0095] The weight ratio of the viscosity-enhancing emulsion to the aqueous emulsion is 1:25;

[0096] The aqueous emulsion, heat-deblocking curing agent, viscosity-enhancing emulsion, thickener, defoamer, bactericide, and pH regulator are the same as those in Example 1;

[0097] The preparation method of the PVC floor adhesive is the same as that of Example 1.

[0098] Example 9

[0099] Embodiment 9 of the present invention provides a PVC floor adhesive for non-absorbent substrates, wherein the raw materials of the PVC floor adhesive include, by weight, 90 parts of aqueous emulsion, 2 parts of heat-deblocking curing agent, 10 parts of tackifying emulsion, 1 part of thickener, 0.5 parts of defoamer, 0.5 parts of bactericide, and 1 part of pH regulator;

[0100] The weight ratio of the thickening emulsion to the aqueous emulsion is 1:9;

[0101] The aqueous emulsion, heat-deblocking curing agent, viscosity-enhancing emulsion, thickener, defoamer, bactericide, and pH regulator are the same as those in Example 1;

[0102] The preparation method of the PVC floor adhesive is the same as that of Example 1.

[0103] Example 10

[0104] Example 10 of the present invention improves a PVC floor glue for non-absorbent base layers, and its specific implementation method is the same as that of Example 1, except that the defoaming agent is a silicone defoaming agent, and the silicone defoaming agent is purchased from Fujian Xister Environmental Protection Materials Technology Co., Ltd., model Z-201.

[0105] Performance Testing

[0106] The PVC floor adhesive for non-absorbent base prepared in Examples 1 to 10 was used to bond the PVC floor to the non-absorbent base, and the adhesive was applied on both sides. After the water evaporated and the adhesive film became dry, it was immediately bonded, and then hot-pressed with a 100° C. heated roller for 3 minutes. After curing for 48 hours, the 90-degree peel strength, shear strength and tensile strength were tested.

[0107] Take the commercially available one-component water-based adhesive Henkel K188E, and test its 90-degree peel strength, shear strength and pull-out strength according to the above method.

[0108] Evaluation criteria:

[0109] 1.90 degree peel strength is greater than or equal to 70N / 50mm (25℃) for A; 90 degree peel strength is greater than or equal to 65N / 50mm (25℃) and less than 70N / 50mm (25℃) for B; 90 degree peel strength is greater than or equal to 60N / 50mm (25℃) and less than 65N / 50mm (25℃) for C; 90 degree peel strength is less than 60N / 50mm (25℃) for D.

[0110] 2. Shear strength is greater than or equal to 1.35N / mm for A; shear strength is greater than or equal to 1.15N / mm and less than 1.35N / mm for B; shear strength is greater than or equal to 0.8N / mm and less than 1.15N / mm for C; shear strength is less than 0.8N / mm for D.

[0111] 3. A is defined as a pull-out strength greater than or equal to 0.7 MPa; B is defined as a pull-out strength greater than or equal to 0.55 MPa and less than 0.7 MPa; C is defined as a pull-out strength greater than or equal to 0.4 MPa and less than 0.55 MPa; and D is defined as a pull-out strength less than 0.4 MPa.

[0112] The test results are shown in Table 1:

[0113] Table 1

[0114]

[0115] The foregoing examples are merely illustrative and are used to explain some features of the method of the present invention. The appended claims are intended to claim the widest possible range that can be conceived, and the embodiments presented herein are only illustrations of selected implementations according to the combination of all possible embodiments. Therefore, it is the applicant's intention that the appended claims are not limited by the selection of examples that illustrate the features of the present invention. Some numerical ranges used in the claims also include sub-ranges within them, and changes in these ranges should also be interpreted as being covered by the appended claims where possible.

Claims

1. A PVC floor adhesive for non-absorbent substrates, characterized in that: The raw materials of the PVC floor glue include, by weight, 70-90 parts of aqueous emulsion, 1-5 parts of thermal deblocking curing agent, 5-20 parts of viscosity-enhancing emulsion, 0.5-3 parts of thickener, 0.1-1 parts of defoamer, 0.2-1.0 parts of bactericide, and 0-2 parts of pH regulator; The solid content of the aqueous emulsion is 45-55wt%, and the aqueous emulsion is Covestro Dispercoll U54 or Sancure AU-4010; The tackifying emulsion is a polymerized rosin emulsion; the polymerized rosin emulsion is Guangxi Feizhuo Guinox 6150; The weight ratio of the viscosity-enhancing emulsion to the aqueous emulsion is 1:6 or 1:18; The thickener is a polyurethane emulsion thickener; the polyurethane emulsion thickener is Coapur 830W.

2. The PVC floor adhesive for non-absorbent substrate according to claim 1, characterized in that: The defoamer is at least one of an organosilicon defoamer, a polyether defoamer, a high-carbon alcohol defoamer, and a polyether-modified organosilicon defoamer.

3. The PVC floor adhesive for non-absorbent substrate according to claim 1, characterized in that: The bactericide is one or more of methylisothiazolinone, methylchloroisothiazolinone and 1,2-benzisothiazolin-3-one.

4. The PVC floor adhesive for non-absorbent substrate according to claim 1, characterized in that: The pH value regulator is one of monoethanolamine, diethanolamine, triethanolamine, sodium hydroxide, potassium hydroxide, ammonia water, and 2-amino-2-methyl-1-propanol.

5. The PVC floor adhesive for non-absorbent substrate according to claim 1, characterized in that: The desealing temperature of the heat-desealing curing agent is 100-150°C.

6. A method for preparing a PVC floor adhesive for a non-absorbent base layer according to any one of claims 1 to 5, characterized in that: The preparation method of the PVC floor glue comprises: mixing and stirring the aqueous emulsion, the viscosity-enhancing emulsion, the thickener, the bactericide and the pH value adjuster evenly, adding the defoamer and stirring evenly, and then adding the heat-deblocking curing agent and stirring evenly to obtain the PVC floor glue.

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