CN114085630A - Preparation method of coating adhesive - Google Patents
Preparation method of coating adhesive Download PDFInfo
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- CN114085630A CN114085630A CN202111405259.0A CN202111405259A CN114085630A CN 114085630 A CN114085630 A CN 114085630A CN 202111405259 A CN202111405259 A CN 202111405259A CN 114085630 A CN114085630 A CN 114085630A
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- mixed solution
- solvent
- mixing
- coating glue
- synthetic rubber
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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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a preparation method of coating glue, which is used for being attached to a low surface energy material, and comprises the following steps: mixing a first solvent and a second solvent which can be mutually dissolved to prepare a first mixed solution, wherein the polarity of the first mixed solution is 1-3; wherein the polarity range of the first solvent is 0.01-0.2, and the polarity range of the second solvent is 4-6; mixing synthetic rubber and the first mixed solution in a weight ratio of 1 (2-4) to prepare a second mixed solution; and (3) mixing the polyacrylate pressure-sensitive adhesive solution with the second mixed solution according to the weight ratio of 1 (0.7-0.9) to prepare the coating adhesive. The preparation method can prolong the time of the mixed solution in a stable state during preparation, is convenient for coating operation, ensures the attaching effect of the prepared coating glue on the low surface energy material, and improves the stripping force of the coating glue.
Description
Technical Field
The invention relates to the field of adhesive tapes, in particular to a preparation method of a coating adhesive.
Background
Polyacrylate pressure-sensitive adhesives have been widely used in various industries due to their excellent properties. But because of the higher polarity of acrylates, the fit on some low surface energy materials (e.g., silicone rubber, polyethylene, polypropylene, etc.) is poor.
In order to improve the bonding effect of the polyacrylate pressure-sensitive adhesive and the low-surface-energy material, the surface energy of the material can be improved in various ways. Such as by plasma surface treatment, corona, application of primers containing large amounts of organic solvents to the mating surfaces of low surface energy materials, and the like. The method increases the working procedures of the polyacrylate pressure-sensitive adhesive in the using process, improves the use cost, and particularly, the method can pollute the environment and has potential safety hazard when the primer containing a large amount of organic solvents is coated on the binding surface of a low-surface-energy material.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a preparation method of coating glue, which can prolong the time of a mixed solution in a stable state during preparation, is convenient for coating operation, ensures the bonding effect of the prepared coating glue on a low-surface-energy material, and improves the stripping force of the coating glue.
In order to achieve the purpose, the invention adopts the technical scheme that: a preparation method of coating glue, wherein the coating glue is used for being attached to a low-surface-energy material, and the preparation method comprises the following steps:
mixing at least one first solvent and at least one second solvent which can be mutually dissolved to prepare a first mixed solution, wherein the polarity of the first mixed solution is 1-3; wherein the polarity range of the first solvent is 0.01-0.2, and the polarity range of the second solvent is 4-6;
mixing synthetic rubber and the first mixed solution in a weight ratio of 1 (2-4) to prepare a second mixed solution;
and (3) mixing the polyacrylate pressure-sensitive adhesive solution with the second mixed solution according to the weight ratio of 1 (0.7-0.9) to prepare the coating adhesive.
In the above technical scheme, the total weight of the first mixed solution is 100 parts, wherein the first solvent is 30-70 parts.
In the above technical scheme, the first solvent comprises at least one of petroleum ether, n-hexane, cyclohexane, isooctane and n-heptane.
In the above technical scheme, the second solvent includes at least one of acetone, butanone, and ethyl acetate.
In the above technical solution, the synthetic rubber includes at least one of polystyrene butadiene copolymer SBS and polystyrene isoprene copolymer SIS.
In the above technical scheme, the weight ratio of the synthetic rubber to the first mixed solution is 1: 3.
In the technical scheme, the weight ratio of the synthetic rubber to the polyacrylate pressure-sensitive adhesive solution is 1: (2-200).
In the above technical solution, "mixing at least one first solvent and at least one second solvent that are mutually soluble" includes mixing two kinds of the first solvents and one kind of the second solvent.
In the technical scheme, the synthetic rubber and the first mixed solution are stirred and mixed, and the stirring time is more than or equal to 2 hours.
In the technical scheme, the polyacrylate pressure-sensitive adhesive solution and the second mixed solution are stirred and mixed, and the stirring time is more than 10 min.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. according to the invention, synthetic rubber is added into the polyacrylate pressure-sensitive adhesive solution, so that the laminating effect of the polyacrylate pressure-sensitive adhesive and the low-surface-energy material is improved; and a first mixed solution formed by a low-polarity first solvent and a high-polarity second solvent is added into the polyacrylate pressure-sensitive adhesive solution and the synthetic rubber, so that the polyacrylate pressure-sensitive adhesive solution and the synthetic rubber can be dissolved in the first mixed solution, a long-time stable state is realized, the polyacrylate pressure-sensitive adhesive and the synthetic rubber are prevented from being layered in the preparation process of the coating adhesive, the coating effect on a release film is improved, and the quality of the prepared coating adhesive is ensured.
In order to make the aforementioned and other objects, features and advantages of the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description. The described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: a preparation method of coating glue, wherein the coating glue is used for being attached to a low-surface-energy material, and the preparation method comprises the following steps:
mixing at least one first solvent and at least one second solvent which can be mutually dissolved to prepare a first mixed solution, wherein the polarity of the first mixed solution is 1-3; wherein the polarity range of the first solvent is 0.01-0.2, and the polarity range of the second solvent is 4-6;
mixing synthetic rubber and the first mixed solution in a weight ratio of 1 (2-4) to prepare a second mixed solution;
and (3) mixing the polyacrylate pressure-sensitive adhesive solution with the second mixed solution according to the weight ratio of 1 (0.7-0.9) to prepare the coating adhesive.
Synthetic rubber with low polarity, such as polystyrene butadiene copolymer SBS and polystyrene isoprene copolymer SIS, is added into the polyacrylate pressure-sensitive adhesive solution, and the polarity of the whole glue is reduced due to the low polarity of the synthetic rubber, so that the glue can be better soaked on a low-surface-energy material, and the attaching effect of coating glue formed by the polyacrylate pressure-sensitive adhesive on the low-surface-energy material is improved.
The synthetic rubber comprises at least one of polystyrene butadiene copolymer SBS and polystyrene isoprene copolymer SIS. The synthetic rubber is a nonpolar rubber because the molecular chain does not contain polar groups. The polyacrylate pressure-sensitive adhesive contains polar group ester group and has stronger polarity. Therefore, since the polyacrylate pressure-sensitive adhesive is greatly different from the synthetic rubber in structure and polarity, it is very difficult to uniformly mix the polyacrylate pressure-sensitive adhesive and the synthetic rubber in a solution and to maintain a stable state for a long period of time. By adding a first mixed solution formed by mixing a low-polarity first solvent and a high-polarity second solvent, according to the principle of similar intermiscibility, a polar substance polyacrylate pressure-sensitive adhesive is easily dissolved in the high-polarity second solvent, a non-polar substance synthetic rubber is easily dissolved in the low-polarity first solvent, and the low-polarity first solvent and the high-polarity second solvent in the first mixed solution can be mutually dissolved, so that the synthetic rubber and the polyacrylate pressure-sensitive adhesive can be stably dissolved in the first mixed solution, the time for keeping the mixed solution formed by the polyacrylate pressure-sensitive adhesive solution and the synthetic rubber in a stable state is prolonged, the coating process of coating the mixed solution on a release film has a long enough window period, and the large-scale production is guaranteed.
Wherein, the low surface energy is the non-volume work which is required to be done to the substance by reversibly increasing the surface area of the material under the conditions of constant temperature, constant pressure and constant composition; or the excess energy of the surface particles relative to the inner particles. The low surface energy material described in this embodiment is, for example, silicone rubber, polyethylene, polypropylene, or the like.
Specifically, the total weight of the first mixed solution is 100 parts, the first solvent is 30-70 parts, and correspondingly, the second solvent is 70-30 parts. If the first solvent is set to 70 parts, the second solvent is set to 30 parts; or both the first solvent and the second solvent are set to 50 parts. When actually preparing the first mixed solution, the ratio of the first solvent to the second solvent is adjusted according to the amount of the synthetic rubber used. In the mixing of the polyacrylate pressure-sensitive adhesive and the synthetic rubber, when the proportion of the synthetic rubber is increased, the proportion of the first solvent in the first mixed solution is also increased, thereby ensuring that the synthetic rubber can be completely dissolved in the first mixed solution with low polarity.
The polarity range of the first solvent is 0.01-0.2. Preferably, the first solvent comprises at least one of petroleum ether, n-hexane, cyclohexane, isooctane and n-heptane. If the petroleum ether in the first solvent is directly mixed with the second solvent, or the petroleum ether and the normal hexane in the first solvent are simultaneously mixed with the second solvent. The polarity range of the second solvent is 4-6. Preferably, the second solvent comprises at least one of acetone, butanone and ethyl acetate. If the acetone in the second solvent is directly mixed with the first solvent, the acetone and butanone in the second solvent can be simultaneously mixed with the first solvent. Preferably, two of said first solvents may be optionally mixed with one of said second solvents. For example, petroleum ether and n-hexane are mixed with the acetone.
Before the polyacrylate pressure-sensitive adhesive is coated on a release film to prepare a coating adhesive, the amounts of the synthetic rubber and the first mixed solution are determined according to the amount of the polyacrylate pressure-sensitive adhesive required to be used. Preferably, the weight ratio of the synthetic rubber to the polyacrylate pressure-sensitive adhesive is 1: (2-200). The weight ratio of the synthetic rubber to the first mixed solution is 1: 3. For example, the amount of the 40% solid content polyacrylate pressure-sensitive adhesive solution may be 1000g, the amount of the synthetic rubber may be set to 200g, and the amount of the first mixed solution may be set to 600 g. Wherein, the polyacrylate pressure-sensitive adhesive solution can be directly purchased as finished glue from the market. The main components in the polyacrylate pressure-sensitive adhesive solution comprise acrylate copolymer, esterified rosin, terpene phenolic resin and ethyl acetate solvent.
The synthetic rubber and the first mixed solution can be mixed in a stirring manner, and the stirring time is more than or equal to 2 hours, preferably 3 hours. The polyacrylate pressure-sensitive adhesive solution and the second mixed solution can be mixed in a stirring manner, and the stirring time is more than 10 min. The solution is stirred in the mixing process, the stirring time is controlled, the different solutions can be uniformly mixed, and the finally formed coating glue is more stable in state.
The polyacrylate pressure-sensitive adhesive solution, the synthetic rubber and the first mixed solution formed by mixing the first solvent and the second solvent are mixed to form a mixed solution which can stably exist for a long time, so that the mixed solution is conveniently coated on a release film to manufacture coating adhesive, and the bonding effect of the formed coating adhesive and a low surface energy material is ensured. The preparation process only needs physical mixing, is simple and convenient to operate, and reduces the production cost. When the coating glue is bonded with the low-surface-energy material, the bonded low-surface-energy material does not need to be processed, so that the bonding effect is ensured, and the bonding step is simplified.
The following are several sets of experimental data using the above preparation method. In the first to third experimental data, a first solvent and a second solvent are selected and mixed, and the first mixed solution is prepared by mixing the first solvent and the second solvent according to different weight ratios; in the fourth to sixth experimental data, a first solvent in the second group and a second solvent are selected and mixed, and the first mixed solution is prepared according to different weight proportions; selecting a toluene solvent as a first mixed solution in the seventh experimental data; selecting ethyl acetate as a first mixed solution in the experimental data eight; in the experimental data nine, the first mixed solution was not added.
The specific operation steps are as follows:
preparing a first mixed solution by using different solvents and weight ratios thereof;
stirring and mixing 200g of synthetic rubber and the first mixed solution for 3 hours according to the weight ratio of 1:3 to prepare a second mixed solution;
and adding the second mixed solution into 1000g of 40% solid content polyacrylate pressure-sensitive adhesive solution, and stirring and mixing for 30min to obtain the coating adhesive.
The delamination phenomenon test process is as follows: and respectively pouring the groups of coating adhesives prepared in the steps into transparent glass bottles, standing and observing, and recording the time till the layering phenomenon appears. The following are delamination test results:
| the first mixed solution | Whether the synthetic rubber is completely dissolved | Duration of non-layering | |
| Experiment one | Petroleum ether and acetone ratio of 3: 7 | Is that | ＞2h |
| Experiment two | Petroleum ether and acetone in the ratio of 1 to 1 | Is that | ＞16h |
| Experiment three | Petroleum ether and acetone 7: 3 | Is that | ＞8h |
| Experiment four | Petroleum ether, n-hexane and acetone in the weight ratio of 1.5 to 3.5 to 5 | Is that | ＞16h |
| Experiment five | Petroleum ether, n-hexane and acetone 2.5: 5 | Is that | ＞24h |
| Experiment six | Petroleum ether, n-hexane and acetone in the weight ratio of 3.5 to 1.5 to 5 | Is that | ＞24h |
| Experiment seven | Toluene | Is that | ＜5min |
| Experiment five | Acetic acid ethyl ester | Whether or not | / |
| Experiment six | / | Whether or not | / |
From the above results, the preparation method in the application obviously prolongs the time of the stable state of the mixed solution, ensures that the coating process has a sufficiently long window period, provides possibility for large-scale production, and ensures the quality of the coating glue prepared thereby.
The peel force test procedure was: respectively adding 10g of isocyanate curing agent into the coating glue prepared by the experimental data I to the experimental data nine, coating dry glue with the thickness of 50 mu m on a PET film with the thickness of 25 mu m, drying for 10min at 100 ℃, and curing for 48h at 40 ℃ to prepare the test adhesive tape. And (3) pressing the test adhesive tape prepared in the first to ninth experiments with the PE plate by using a 2kg roller to reciprocate 3 times at 600mm/min in the environment of 23 ℃ and 50% RH. After 20min the 180 DEG peel strength (N/25mm) of the test tape was determined according to GB/T2792-2014 using a tensile tester (Kejian model 1065A-D) at a tensile speed of 300 mm/min. The following are peel force test results:
| 180 degree peel force | |
| Experiment one | 970gf/25mm |
| Experiment two | 1200gf/25mm |
| Experiment three | 1080gf/25mm |
| Experiment four | 1180gf/25mm |
| Experiment five | 1250gf/25mm |
| Experiment six | 1220gf/25mm |
| Seven experiment | 720gf/25mm |
| Experiment eight | 690gf/25mm |
| Experiment nine | 500gf/25mm |
From the above results, it is known that the addition of the synthetic rubber to the polyacrylate pressure-sensitive adhesive significantly improves the peeling force of the polyacrylate pressure-sensitive adhesive on the low surface energy PE board.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A preparation method of coating glue, wherein the coating glue is used for being attached to a low-surface-energy material, and is characterized by comprising the following steps:
mixing a first solvent and a second solvent which can be mutually dissolved to prepare a first mixed solution, wherein the polarity of the first mixed solution is 1-3; wherein the polarity range of the first solvent is 0.01-0.2, and the polarity range of the second solvent is 4-6;
mixing synthetic rubber and the first mixed solution in a weight ratio of 1 (2-4) to prepare a second mixed solution;
and (3) mixing the polyacrylate pressure-sensitive adhesive solution with the second mixed solution according to the weight ratio of 1 (0.7-0.9) to prepare the coating adhesive.
2. The method for preparing coating glue according to claim 1, characterized in that: the first solvent is 30-70 parts by weight based on 100 parts by weight of the first mixed solution.
3. The method for preparing coating glue according to claim 1, characterized in that: the first solvent comprises at least one of petroleum ether, n-hexane, cyclohexane, isooctane and n-heptane.
4. The method for preparing coating glue according to claim 1, characterized in that: the second solvent comprises at least one of acetone, butanone and ethyl acetate.
5. The method for preparing coating glue according to claim 1, characterized in that: the synthetic rubber comprises at least one of polystyrene butadiene copolymer SBS and polystyrene isoprene copolymer SIS.
6. The method for preparing coating glue according to claim 1, characterized in that: the weight ratio of the synthetic rubber to the first mixed solution is 1: 3.
7. The method for preparing coating glue according to claim 1, characterized in that: the weight ratio of the synthetic rubber to the polyacrylate pressure-sensitive adhesive solution is 1: (2-200).
8. The method for preparing coating glue according to claim 1, characterized in that: "mixing mutually soluble first and second solvents" includes mixing two of said first solvents with one of said second solvents.
9. The method for preparing coating glue according to claim 1, characterized in that: and stirring and mixing the synthetic rubber and the first mixed solution for more than or equal to 2 hours.
10. The method for preparing coating glue according to claim 1, characterized in that: and stirring and mixing the polyacrylate pressure-sensitive adhesive solution and the second mixed solution for more than 10 min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111405259.0A CN114085630A (en) | 2021-11-24 | 2021-11-24 | Preparation method of coating adhesive |
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| CN202111405259.0A CN114085630A (en) | 2021-11-24 | 2021-11-24 | Preparation method of coating adhesive |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188500A (en) * | 1995-06-22 | 1998-07-22 | 美国3M公司 | Method of using acrylate-containing polymer blends |
| CN1188496A (en) * | 1995-06-22 | 1998-07-22 | 美国3M公司 | Acrylate-containing polymer blends and methods of using |
| CN1190421A (en) * | 1995-06-22 | 1998-08-12 | 美国3M公司 | Acrylate-containing polymer blends |
| CN104603222A (en) * | 2012-08-16 | 2015-05-06 | 罗曼有限合资公司 | Adhesive agent having adhesive blend of acrylate and styrene block copolymer |
| CN110382646A (en) * | 2017-01-12 | 2019-10-25 | 德莎欧洲股份公司 | The method that profile is bonded to substrate surface |
-
2021
- 2021-11-24 CN CN202111405259.0A patent/CN114085630A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188500A (en) * | 1995-06-22 | 1998-07-22 | 美国3M公司 | Method of using acrylate-containing polymer blends |
| CN1188496A (en) * | 1995-06-22 | 1998-07-22 | 美国3M公司 | Acrylate-containing polymer blends and methods of using |
| CN1190421A (en) * | 1995-06-22 | 1998-08-12 | 美国3M公司 | Acrylate-containing polymer blends |
| CN104603222A (en) * | 2012-08-16 | 2015-05-06 | 罗曼有限合资公司 | Adhesive agent having adhesive blend of acrylate and styrene block copolymer |
| CN110382646A (en) * | 2017-01-12 | 2019-10-25 | 德莎欧洲股份公司 | The method that profile is bonded to substrate surface |
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