CN115975521A - Protective film for improving adhesion of organic silicon pressure-sensitive adhesive and preparation method thereof - Google Patents
Protective film for improving adhesion of organic silicon pressure-sensitive adhesive and preparation method thereof Download PDFInfo
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- CN115975521A CN115975521A CN202310028239.9A CN202310028239A CN115975521A CN 115975521 A CN115975521 A CN 115975521A CN 202310028239 A CN202310028239 A CN 202310028239A CN 115975521 A CN115975521 A CN 115975521A
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Abstract
The invention discloses a protective film for improving the adhesiveness of an organic silicon pressure-sensitive adhesive and a preparation method thereof, which relate to the technical field of organic silicon pressure-sensitive adhesives and comprise a base material layer, a bottom coating, an organic silicon adhesive layer and a protective film layer which are sequentially arranged from top to bottom; wherein, the bottom coating is prepared from the following raw materials: acrylic resin, a curing agent, an antistatic agent and a solvent; the organic silicon adhesive layer is prepared from the following raw materials: silicone pressure sensitive adhesive, cross-linking agent, inhibitor, catalyst and solvent. The base coat can effectively improve the adhesiveness of the organic silicon pressure-sensitive adhesive to the base material, an anchoring agent is not required to be added into the organic silicon pressure-sensitive adhesive, the cost is greatly reduced, the product quality is improved, the adhesive layer and the base material layer are not subjected to glue falling and powder falling after being boiled for more than 4 hours, and repeated experiments prove that: under the high-temperature and high-humidity environment, the adhesive layer and the substrate layer of the organic silicon adhesive have no adhesive falling and powder falling phenomena, and have no adhesive residue phenomenon with a stuck object.
Description
Technical Field
The invention relates to the technical field of organic silicon pressure-sensitive adhesives, in particular to a protective film for improving the adhesiveness of an organic silicon pressure-sensitive adhesive and a preparation method thereof.
Background
The organic silicon pressure-sensitive adhesive generally refers to a pressure-sensitive adhesive using an organic silicon polymer as a main body, or an acrylic acid and organic silicon modified rubber type pressure-sensitive adhesive modified by the organic silicon polymer. Compared with the traditional acrylate pressure-sensitive adhesive and rubber pressure-sensitive adhesive, the acrylate pressure-sensitive adhesive has excellent performances of chemical resistance, water resistance, oil resistance, solvent resistance, high temperature resistance, low temperature resistance, thermal degradation resistance, oxidative degradation resistance and the like, and can be bonded with various materials which are difficult to bond, such as polyolefin (BOPP, PET, PE and the like), fluoroplastic, polyimide, polycarbonate and the like which are not subjected to surface treatment.
In recent years, with the development of the organic silicon process and the popularization of the application technology in China, the research, development, production and application of the addition type liquid silicone rubber also make great progress. Addition type liquid silicone rubbers have poor adhesion, and when used as potting, coating, or insert injection molding materials, the base material is usually primed in order to improve adhesion to the contacting base material. Because of the diversity of contact substrates and the continuous improvement of the adhesion of the contact substrates, the development of new primer varieties has been a research hotspot in the field. However, the existing primers have insufficient adhesion, and an anchoring agent is often required to be added into the silicone pressure-sensitive adhesive layer to improve the adhesion performance, so that the production cost is increased.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a protective film for improving the adhesiveness of an organic silicon pressure-sensitive adhesive and a preparation method thereof.
The invention provides a protective film for improving the adhesiveness of an organic silicon pressure-sensitive adhesive, which comprises a base material layer, a bottom coating, an organic silicon adhesive layer and a protective film layer which are sequentially arranged from top to bottom;
wherein, the bottom coating is prepared from the following raw materials: acrylic resin, a curing agent, an antistatic agent and a solvent;
the organic silicon adhesive layer is prepared from the following raw materials: silicone pressure sensitive adhesive, cross-linking agent, inhibitor, catalyst and solvent.
Preferably, the base coat is prepared from the following raw materials in percentage by mass: 7 to 20 percent of acrylic resin, 0.01 to 2 percent of curing agent, 0.02 to 10 percent of antistatic agent and the balance of solvent.
Preferably, the acrylic resin is polymethyl methacrylate resin;
the curing agent is azobisisobutyronitrile;
the antistatic agent is tri-n-butyl methyl ammonium bis (trifluoromethanesulfonyl) imide salt;
the solvent is one or more of toluene, xylene, ethyl acetate, butanone and 100-200 solvent oil.
Preferably, the organic silicon adhesive layer is prepared from the following raw materials in percentage by mass: 30 to 70 percent of organic silicon pressure-sensitive adhesive, 0.01 to 10 percent of cross-linking agent, 0.01 to 10 percent of inhibitor, 0.01 to 10 percent of catalyst and the balance of solvent.
Preferably, the material of the substrate layer is one of BOPP, BOPET, BOPA, PET, PE, PC, TAC, PP, PS, PMMA, TPU, PI, PVB, and PVC.
Preferably, the material of the protective film layer is one of BOPP, BOPET, BOPA, PET, PE, PC, TAC, PP, PS, PMMA, TPU, PI, PVB, and PVC.
The invention also provides a preparation method of the protective film for improving the adhesion of the organic silicon pressure-sensitive adhesive, which comprises the following steps: mixing the raw materials of the base coat according to the proportion, coating the mixture on a substrate, and drying to obtain the base coat; mixing the raw materials of the organic silicon adhesive layer, coating the mixture on the bottom coating, curing and drying to obtain the organic silicon adhesive layer; and adhering a protective film on the organic silicon adhesive layer, and rolling to obtain the adhesive.
Has the advantages that: according to the invention, the component proportion of the base coat is optimized, the surface of the base material is improved, the interlayer adhesion is enhanced, the adhesion of the organic silicon adhesive layer and the base material is promoted, and the purpose of firming the base material and the adhesive is achieved. The base coat can effectively improve the adhesiveness of the organic silicon pressure-sensitive adhesive to the base material, an anchoring agent is not required to be added into the organic silicon pressure-sensitive adhesive, the cost is greatly reduced, the product quality is improved, the adhesive falling and powder falling phenomena between the organic silicon adhesive layer and the base material layer after being boiled for more than 4 hours do not occur, and repeated experiments prove that: under the high-temperature and high-humidity environment, the adhesive layer and the substrate layer of the organic silicon adhesive have no adhesive falling and powder falling phenomena, and have no adhesive residue phenomenon with a stuck object.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
The invention provides a protective film for improving the adhesiveness of an organic silicon pressure-sensitive adhesive, which comprises a base material layer, a bottom coating, an organic silicon adhesive layer and a protective film layer which are sequentially arranged from top to bottom; the preparation method comprises the steps of firstly mixing the raw materials of the base coat according to the proportion, then coating the mixture on a substrate, and drying to obtain the base coat; mixing the raw materials of the organic silicon adhesive layer, coating the mixture on the bottom coating, curing and drying to obtain the organic silicon adhesive layer; and then adhering a protective film on the organic silicon adhesive layer, and rolling to obtain the adhesive.
The base coat is prepared from the following raw materials in percentage by mass: 7 percent of acrylic resin, 0.01 percent of curing agent, 0.02 percent of antistatic agent and the balance of solvent; the acrylic resin is polymethyl methacrylate resin, the curing agent is azodiisobutyronitrile, the antistatic agent is tri-n-butyl ammonium bis (trifluoromethanesulfonyl) imide salt, and the solvent is 200# solvent oil.
The organic silicon adhesive layer is prepared from the following raw materials in percentage by mass: 30% of organic silicon pressure-sensitive adhesive, 0.05% of cross-linking agent, 0.01% of inhibitor, 0.01% of catalyst and the balance of solvent.
The material of the base material layer is BOPP; the material of the protective film layer is BOPP.
Example 2
The invention provides a protective film for improving the adhesiveness of an organic silicon pressure-sensitive adhesive, which comprises a base material layer, a bottom coating, an organic silicon adhesive layer and a protective film layer which are sequentially arranged from top to bottom; the preparation method comprises the steps of firstly mixing the raw materials of the base coat according to the proportion, then coating the mixture on a substrate, and drying to obtain the base coat; then, mixing the raw materials of the organic silicon adhesive layer, coating the mixture on the bottom coating, and curing and drying to obtain the organic silicon adhesive layer; and then adhering a protective film on the organic silicon adhesive layer, and rolling to obtain the adhesive.
The base coat is prepared from the following raw materials in percentage by mass: 12% of acrylic resin, 0.3% of curing agent, 0.1% of antistatic agent and the balance of solvent; the acrylic resin is polymethyl methacrylate resin, the curing agent is azodiisobutyronitrile, the antistatic agent is tri-n-butyl ammonium bis (trifluoromethanesulfonyl) imide salt, and the solvent is toluene.
The organic silicon adhesive layer is prepared from the following raw materials in percentage by mass: 50% of organic silicon pressure-sensitive adhesive, 1% of cross-linking agent, 0.05% of inhibitor, 0.2% of catalyst and the balance of solvent.
The material of the base material layer is PET; the material of the protective film layer is PVC.
Example 3
The invention provides a protective film for improving the adhesiveness of an organic silicon pressure-sensitive adhesive, which comprises a base material layer, a bottom coating, an organic silicon adhesive layer and a protective film layer which are sequentially arranged from top to bottom; the preparation method comprises the steps of firstly mixing the raw materials of the base coat according to the proportion, then coating the mixture on a substrate, and drying to obtain the base coat; then, mixing the raw materials of the organic silicon adhesive layer, coating the mixture on the bottom coating, and curing and drying to obtain the organic silicon adhesive layer; and then adhering a protective film on the organic silicon adhesive layer, and rolling to obtain the adhesive.
The base coat is prepared from the following raw materials in percentage by mass: 15% of acrylic resin, 0.8% of curing agent, 2% of antistatic agent and the balance of solvent; the acrylic resin is polymethyl methacrylate resin, the curing agent is azodiisobutyronitrile, the antistatic agent is tri-n-butyl ammonium bis (trifluoromethanesulfonyl) imide salt, and the solvent is xylene and ethyl acetate according to the volume ratio of 1:1.
The organic silicon adhesive layer is prepared from the following raw materials in percentage by mass: 60% of organic silicon pressure-sensitive adhesive, 3% of cross-linking agent, 0.2% of inhibitor, 0.5% of catalyst and the balance of solvent.
The material of the base material layer is PVC; the material of the protective film layer is BOPP.
Example 4
The invention provides a protective film for improving the adhesiveness of an organic silicon pressure-sensitive adhesive, which comprises a base material layer, a bottom coating, an organic silicon adhesive layer and a protective film layer which are sequentially arranged from top to bottom; the preparation method comprises the steps of firstly mixing the raw materials of the base coat according to the proportion, then coating the mixture on a substrate, and drying to obtain the base coat; then, mixing the raw materials of the organic silicon adhesive layer, coating the mixture on the bottom coating, and curing and drying to obtain the organic silicon adhesive layer; and then adhering a protective film on the organic silicon adhesive layer, and rolling to obtain the adhesive.
The base coat is prepared from the following raw materials in percentage by mass: 20% of acrylic resin, 2% of a curing agent, 4% of an antistatic agent and the balance of a solvent; the acrylic resin is polymethyl methacrylate resin, the curing agent is azodiisobutyronitrile, the antistatic agent is tri-n-butyl ammonium bis (trifluoromethanesulfonyl) imide salt, and the solvent is xylene and 100# solvent oil according to the volume ratio of 3:1.
The organic silicon adhesive layer is prepared from the following raw materials in percentage by mass: 70% of organic silicon pressure-sensitive adhesive, 8% of cross-linking agent, 1% of inhibitor, 3% of catalyst and the balance of solvent.
The material of the base material layer is PET; the material of the protective film layer is PMMA.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The protective film for improving the adhesiveness of the organic silicon pressure-sensitive adhesive is characterized by comprising a base material layer, a bottom coating layer, an organic silicon adhesive layer and a protective film layer which are sequentially arranged from top to bottom;
wherein, the bottom coating is prepared from the following raw materials: acrylic resin, a curing agent, an antistatic agent and a solvent;
the organic silicon adhesive layer is prepared from the following raw materials: silicone pressure sensitive adhesive, cross-linking agent, inhibitor, catalyst and solvent.
2. The protective film for improving the adhesion of the silicone pressure-sensitive adhesive according to claim 1, wherein the primer layer is prepared from the following raw materials in percentage by mass: 7 to 20 percent of acrylic resin, 0.01 to 2 percent of curing agent, 0.02 to 10 percent of antistatic agent and the balance of solvent.
3. The protective film for improving the adhesion of silicone pressure-sensitive adhesive according to claim 2, wherein the acrylic resin is polymethyl methacrylate resin;
the curing agent is azobisisobutyronitrile;
the antistatic agent is tri-n-butyl methyl ammonium bis (trifluoromethanesulfonyl) imide salt;
the solvent is one or more of toluene, xylene, ethyl acetate, butanone and 100-200 solvent oil.
4. The protective film for improving the adhesion of the silicone pressure-sensitive adhesive according to claim 1, wherein the silicone adhesive layer is prepared from the following raw materials in percentage by mass: 30 to 70 percent of organic silicon pressure-sensitive adhesive, 0.01 to 10 percent of cross-linking agent, 0.01 to 10 percent of inhibitor, 0.01 to 10 percent of catalyst and the balance of solvent.
5. The protective film for improving adhesion of silicone pressure sensitive adhesive according to claim 1, wherein the substrate layer material is one of BOPP, BOPET, BOPA, PET, PE, PC, TAC, PP, PS, PMMA, TPU, PI, PVB, and PVC.
6. The protective film for improving adhesion of silicone pressure sensitive adhesive according to claim 1, wherein the material of the protective film layer is one of BOPP, BOPET, BOPA, PET, PE, PC, TAC, PP, PS, PMMA, TPU, PI, PVB, and PVC.
7. The method for preparing the protective film for improving the adhesion of the silicone pressure-sensitive adhesive according to any one of claims 1 to 6, wherein the steps are as follows: mixing the raw materials of the base coat according to the proportion, coating the mixture on a substrate, and drying to obtain the base coat; then, mixing the raw materials of the organic silicon adhesive layer, coating the mixture on the bottom coating, and curing and drying to obtain the organic silicon adhesive layer; and then adhering a protective film on the organic silicon adhesive layer, and rolling to obtain the adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310028239.9A CN115975521A (en) | 2023-01-09 | 2023-01-09 | Protective film for improving adhesion of organic silicon pressure-sensitive adhesive and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310028239.9A CN115975521A (en) | 2023-01-09 | 2023-01-09 | Protective film for improving adhesion of organic silicon pressure-sensitive adhesive and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115975521A true CN115975521A (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310028239.9A Pending CN115975521A (en) | 2023-01-09 | 2023-01-09 | Protective film for improving adhesion of organic silicon pressure-sensitive adhesive and preparation method thereof |
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| CN (1) | CN115975521A (en) |
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- 2023-01-09 CN CN202310028239.9A patent/CN115975521A/en active Pending
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