PVC material shielding glue and preparation method thereof
By preparing a PVC material masking adhesive containing nitrile rubber, the problem of decreased stickiness and adhesion of traditional masking materials in oily environments was solved, achieving a high-efficiency masking effect and improved operational efficiency in oily environments.
Patent Information
- Application Number
- CN202511767730.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-02-27
AI Technical Summary
Traditional masking materials lose their stickiness and adhesion in oily environments, resulting in poor performance of PVC masking adhesive.
A PVC masking adhesive is prepared using a combination of natural rubber, nitrile rubber, polyurethane, plasticizer, antioxidant, and filler through a specific preparation method. The polar cyano groups of nitrile rubber resist oil stains, ensuring that the adhesive layer maintains adhesion and stability on oily surfaces.
Even in oily environments, masking tape maintains good adhesion and prevents edges from lifting and falling off, ensuring masking effectiveness, expanding application scenarios, reducing pretreatment requirements, and improving operational efficiency.
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Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of masking glue, in particular to a PVC material masking glue and a preparation method thereof. BACKGROUND
[0002] In the industrial links such as spraying, processing and transportation, masking materials are often used to temporarily protect specific parts of workpieces to prevent paint splashing, scratching or contamination. Traditional masking materials (such as ordinary crepe paper adhesive tape) have many limitations: especially in the use environment with stains, especially with oil stains, their adhesion and adhesion are greatly reduced, resulting in poor use effect of PVC masking glue. Therefore, we provide a PVC material masking glue to solve this problem. SUMMARY
[0003] In view of the deficiencies of the prior art, the present application provides a PVC material masking glue to solve this problem.
[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a PVC material masking glue, by weight percentage, comprising the following components: natural rubber 15%~35%, nitrile rubber 15%~18%, polyurethane 8%~15%, plasticizer 4%~6%, antioxidant 0.5%~1%, filler 3%~5%, and the rest is solvent.
[0005] Further improvement scheme: the plasticizer includes at least one of dioctyl phthalate, citrate ester, epoxy ester, phthalate ester and naphthenic oil.
[0006] Further improvement scheme: the antioxidant is at least one of alkyl diphenylamine, naphthylamine and zinc dialkyldithiophosphate.
[0007] Further improvement scheme: the filler includes at least one of calcium carbonate and fumed silica.
[0008] Further improvement scheme: the solvent includes any one of toluene and xylene.
[0009] The present application also provides a PVC material masking glue, by weight percentage, comprising the following components: natural rubber 15%~35%, nitrile rubber 15%~18%, polyurethane 8%~15%, plasticizer 1%~3%, antioxidant 2%~3%, filler 3%~5%, and the rest is solvent.
[0010] Further improvement scheme: the plasticizer includes at least one of dioctyl phthalate and phthalate ester.
[0011] Further improvement scheme: the antioxidant is at least one of alkyl diphenylamine, naphthylamine and zinc dialkyldithiophosphate.
[0012] Further improvement: the solvent includes any one of toluene and xylene.
[0013] The application also provides a preparation method of the PVC material masking adhesive, comprising the following steps: S1, 15%~35% of natural rubber, 15%~18% of nitrile rubber, 8%~15% of polyurethane, 1%~2% of plasticizer, 0.5%~1% of antioxidant, 3%~5% of filler, and sufficient amount of solvent are added into a stirring kettle and stirred for 30 min to prepare a first mixed solution; S2, the first mixed solution is added into a reaction kettle, heated to 65~80 DEG C, then the remaining plasticizer is added into the reaction kettle and reacted for 20 min to obtain a second mixed solution, and when the temperature is reduced to 45~55 DEG C S3, the remaining antioxidant is added into the second mixed solution in the reaction kettle and stirred for 20 min to obtain a third mixed solution; S4, the third mixed solution is cooled to 23~25 DEG C, and then the alkaline solution is adjusted to pH 8-9; S5, after filtering with a 20~30 mesh filter screen, the PVC material masking adhesive is obtained.
[0014] Compared with the prior art, the application provides a PVC material masking adhesive, which has the following beneficial effects: 1. Excellent oil resistance and stable adhesion The most core beneficial effect of the scheme is that the polar cyano group contained in the molecular structure of the nitrile rubber has natural resistance to non-polar mineral oil, grease and the like. This makes the masking adhesive tape prepared therefrom not swell, soften or chemically damaged due to the infiltration of oil when contacting the oil-stained surface, thereby effectively overcoming the technical bottleneck that the cohesive strength and adhesion of the traditional adhesive rapidly decrease in the oil-stained environment. Even in the industrial environment with oil stains, the adhesive tape can still maintain the initial designed adhesion level and adhesion force, ensuring the reliability of the masking protection.
[0015] 2. Achieve stable interface bonding and reliable masking sealing Since the adhesive can still form effective infiltration and adhesion on the oil-stained surface, the application can form a high-strength and stable interface bonding with the workpiece surface which has processing oil stains, rust-proof oil or operation stains. This feature completely solves the problem of adhesive tape edge lifting and falling off caused by oil stains, thereby ensuring the continuity and sealing of the masking boundary, fundamentally eliminating the risk of paint and solvent penetration along the interface, and obtaining clear and sharp spraying boundary line.
[0016] 3. Broaden the application scenarios and improve the operation efficiency This technical improvement makes the application range of the PVC masking tape extend from clean environment to harsh industrial scenes with oil stains, such as mechanical processing workshops, automobile engine compartment peripheral part repair, equipment remanufacturing, and other fields that were difficult to achieve effective masking in the past. The operator does not need to perform extremely harsh and time-consuming degreasing cleaning on the adherend surface, significantly reducing the pretreatment requirements and comprehensive construction cost, and improving the production and maintenance efficiency.
[0017] 4. Maintaining the synergistic performance of the base material and the adhesive layer The selected nitrile rubber adhesive has good compatibility and bonding force with the PVC film base material, avoiding interfacial peeling under stress due to mismatch between the adhesive layer and the base material. At the same time, this scheme does not sacrifice the inherent flexibility, easy tear-off property, and high temperature stability of the adhesive tape while achieving excellent oil resistance, achieving a balance of multiple excellent properties. DETAILED DESCRIPTION
[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.
[0019] The following are specific embodiments EMBODIMENT
[0020] A PVC material masking adhesive, by weight percentage, includes the following components: natural rubber 15g, nitrile rubber 15g, polyurethane 8g, plasticizer 4g, antioxidant 0.5g, filler 3g, solvent 54.5g.
[0021] The preparation method of the PVC material masking adhesive according to the above components includes the following steps: S1, 15g of natural rubber, 15g of nitrile rubber, 8g of polyurethane, 1g of plasticizer, 0.5g of antioxidant, 3g of filler, and 54.5g of solvent are added to a stirring kettle and stirred for 30min to prepare a first mixed solution; S2, the first mixed solution is added to a reaction kettle, heated to 65-80℃, then the remaining 3g of plasticizer is added to the reaction kettle and reacted for 20min to obtain a second mixed solution, and the temperature is lowered to 45-55℃; S3, the remaining antioxidant is added to the second mixed solution in the reaction kettle and stirred for 20min to obtain a third mixed solution (if there is no remaining antioxidant after the first stirring, this step can be omitted); S4, the third mixed solution is cooled to 23-25℃, and then adjusted to pH 8-9 with lye; S5, filtering with 20-30 mesh filter screen to obtain the PVC material shielding glue. Embodiment
[0022] A PVC material shielding glue, comprising the following components by weight percentage: natural rubber 20g, nitrile rubber 16g, polyurethane 10g, plasticizer 4g, antioxidant 0.8g, filler 4g, solvent 44.2g.
[0023] A method for preparing the PVC material shielding glue with the above components, comprising the following steps: S1, adding 35g of natural rubber, 16g of nitrile rubber, 10g of polyurethane, 2g of plasticizer, 0.5g of antioxidant, 2g of filler, and 44.2g of solvent into a stirring kettle and stirring for 30 minutes to prepare a first mixed solution; S2, adding the first mixed solution into a reaction kettle, heating to 65-80℃, then adding the remaining 3g of plasticizer into the reaction kettle and reacting for 20 minutes to obtain a second mixed solution, and waiting for the temperature to drop to 45-55℃; S3, adding the remaining 0.3g of antioxidant into the second mixed solution in the reaction kettle and stirring for 20 minutes to obtain a third mixed solution (if there is no remaining antioxidant after the first stirring, this step can be omitted); S4, cooling the third mixed solution to 23-25℃, and then adjusting to pH 8-9 with lye; S5, filtering with 20-30 mesh filter screen to obtain the PVC material shielding glue. Embodiment
[0024] A PVC material shielding glue, comprising the following components by weight percentage: natural rubber 35g, nitrile rubber 18g, polyurethane 15g, plasticizer 6g, antioxidant 1g, filler 5g, solvent 20g.
[0025] A method for preparing the PVC material shielding glue with the above components, comprising the following steps: S1, adding 35g of natural rubber, 18g of nitrile rubber, 15g of polyurethane, 2g of plasticizer, 0.5g of antioxidant, 5g of filler, and 20g of solvent into a stirring kettle and stirring for 30 minutes to prepare a first mixed solution; S2, adding the first mixed solution into a reaction kettle, heating to 65-80℃, then adding the remaining 4g of plasticizer into the reaction kettle and reacting for 20 minutes to obtain a second mixed solution, and waiting for the temperature to drop to 45-55℃; S3, adding the remaining 0.5g of antioxidant into the second mixed solution in the reaction kettle and stirring for 20 minutes to obtain a third mixed solution (if there is no remaining antioxidant after the first stirring, this step can be omitted); S4, cool the third mixture to 23-25℃, and then adjust to pH 8-9 with lye; S5, filter with 20-30 mesh screen to obtain the PVC material masking glue. Embodiment
[0026] A PVC material masking glue, by weight percentage, comprises the following components: natural rubber 15g, nitrile rubber 15g, polyurethane 8g, plasticizer 1g, antioxidant 2g, filler 3g, solvent 56g.
[0027] A method for preparing the PVC material masking glue according to the above components, comprising the following steps: S1, add 15g of natural rubber, 15g of nitrile rubber, 8g of polyurethane, 1g of plasticizer, 0.5g of antioxidant, 3g of filler, and 56g of solvent into a stirring kettle and stir for 30 minutes to prepare a first mixture; S2, add the first mixture into a reaction kettle, heat to 65-80℃, then add the remaining plasticizer (if there is no remaining plasticizer after the first stirring, this step can be omitted) into the reaction kettle and react for 20 minutes to obtain a second mixture, and wait for the temperature to drop to 45-55℃; S3, add the remaining 0.5g of antioxidant into the second mixture in the reaction kettle and stir for 20 minutes to obtain a third mixture (if there is no remaining antioxidant after the first stirring, this step can be omitted); S4, cool the third mixture to 23-25℃, and then adjust to pH 8-9 with lye; S5, filter with 20-30 mesh screen to obtain the PVC material masking glue. Embodiment
[0028] A PVC material masking glue, by weight percentage, comprises the following components: natural rubber 25g, nitrile rubber 16g, polyurethane 12g, plasticizer 2g, antioxidant 3g, filler 4g, solvent 38g.
[0029] A method for preparing the PVC material masking glue according to the above components, comprising the following steps: S1, add 25g of natural rubber, 16g of nitrile rubber, 12g of polyurethane, 1.5g of plasticizer, 0.5g of antioxidant, 4g of filler, and 38g of solvent into a stirring kettle and stir for 30 minutes to prepare a first mixture; S2, add the first mixture into a reaction kettle, heat to 65-80℃, then add the remaining 0.5g of plasticizer (if there is no remaining plasticizer after the first stirring, this step can be omitted) into the reaction kettle and react for 20 minutes to obtain a second mixture, and wait for the temperature to drop to 45-55℃; S3. Add the remaining 1.5g of antioxidant to the second mixture in the reactor and stir for 20 minutes to obtain the third mixture (this step can be omitted if there is no antioxidant remaining after the first stirring). S4. Cool the third mixture to 23℃~25℃, and then adjust the pH to 8-9 with alkaline solution; S5. After filtering with a 20-30 mesh filter, the PVC material masking adhesive is obtained. Example
[0030] A PVC material masking adhesive, by weight percentage, comprises the following components: 35g natural rubber, 18g nitrile rubber, 15g polyurethane, 3g plasticizer, 3g antioxidant, 5g filler, and 21g solvent.
[0031] The preparation method of PVC material masking adhesive based on the above components includes the following steps: S1. Add 35g of natural rubber, 18g of nitrile rubber, 15g of polyurethane, 2g of plasticizer, 0.5g of antioxidant, 5g of filler, and 21g of solvent to a mixing tank and stir for 30 minutes to obtain the first mixture. S2. Add the first mixture to the reactor and heat it to 65℃~80℃. Then add the remaining 1g of plasticizer (this step can be omitted if there is no plasticizer left after the first stirring) to the reactor and react for 20 minutes to obtain the second mixture. Then wait for the temperature to drop to 45℃~55℃. S3. Add the remaining 2.5g of antioxidant to the second mixture in the reactor and stir for 20 minutes to obtain the third mixture (this step can be omitted if there is no antioxidant remaining after the first stirring). S4. Cool the third mixture to 23℃~25℃, and then adjust the pH to 8-9 with alkaline solution; S5. After filtering with a 20-30 mesh filter, the PVC material masking adhesive is obtained.
[0032] Comparative Example 1 By weight percentage, it includes the following components: 35g natural rubber, 18g polyurethane rubber, 15g polyurethane, 3g plasticizer, 3g antioxidant, 5g filler, and 21g solvent.
[0033] The preparation method of PVC material masking adhesive based on the above components includes the following steps: S1. Add 35g of natural rubber, 18g of polyurethane rubber, 15g of polyurethane, 2g of plasticizer, 0.5g of antioxidant, 5g of filler, and 21g of solvent to a mixing tank and stir for 30 minutes to obtain the first mixture. S2. Add the first mixture to the reactor and heat it to 65℃~80℃. Then add the remaining 1g of plasticizer (this step can be omitted if there is no plasticizer left after the first stirring) to the reactor and react for 20 minutes to obtain the second mixture. Then wait for the temperature to drop to 45℃~55℃. S3. Add the remaining 2.5g of antioxidant to the second mixture in the reactor and stir for 20 minutes to obtain the third mixture (this step can be omitted if there is no antioxidant remaining after the first stirring). S4. Cool the third mixture to 23℃~25℃, and then adjust the pH to 8-9 with alkaline solution; S5. After filtering with a 20-30 mesh filter, the PVC material masking adhesive is obtained.
[0034] Comparative Example 2 By weight percentage, it includes the following components: 35g natural rubber, 18g polyurethane rubber, 15g polyurethane, 3g plasticizer, 3g antioxidant, 3g filler, and 23g solvent.
[0035] The preparation method of PVC material masking adhesive based on the above components includes the following steps: S1. Add 35g of natural rubber, 18g of polyurethane rubber, 15g of polyurethane, 2g of plasticizer, 0.5g of antioxidant, 3g of filler, and 23g of solvent to a mixing tank and stir for 30 minutes to obtain the first mixture. S2. Add the first mixture to the reactor and heat it to 65℃~80℃. Then add the remaining 1g of plasticizer (this step can be omitted if there is no plasticizer left after the first stirring) to the reactor and react for 20 minutes to obtain the second mixture. Then wait for the temperature to drop to 45℃~55℃. S3. Add the remaining 2.5g of antioxidant to the second mixture in the reactor and stir for 20 minutes to obtain the third mixture (this step can be omitted if there is no antioxidant remaining after the first stirring). S4. Cool the third mixture to 23℃~25℃, and then adjust the pH to 8-9 with alkaline solution; S5. After filtering with a 20-30 mesh filter, the PVC material masking adhesive is obtained.
[0036] Performance tests were conducted on the examples and comparative examples. The PVC masking adhesives prepared in the examples and comparative examples were coated onto PVC substrates for later use. Test items included room temperature adhesion, high temperature adhesion, whether brittle fracture occurred during rapid film removal, and whether adhesive residue occurred during rapid film removal. The test results are shown in Table 1. Specific test methods are as follows: Room temperature adhesion: Cut a strip 25mm wide, use a 2kg weight to adhere the tape until it has a uniformly spread 0.1ml / cm.2 Oil stain SUS standard test sample, after being placed in a standard environment (23±2℃, 55±5%RH) for 30 minutes, the peel force of the PVC substrate was tested using a tensile testing machine at a tensile speed of 300mm / min.
[0037] High-temperature adhesion: Cut a strip 25mm wide, and use a 2kg weight to adhere the tape until it has a uniformly spread 0.1ml / cm. 2 The SUS standard test sample with oil stains was placed in an environment of 300℃ for 15 minutes, then removed and left to stand at room temperature for 2 hours. The peel force of the PVC substrate was then tested using a tensile testing machine at a tensile speed of 500 mm / min.
[0038] To check for brittle fracture and residual adhesive during rapid film removal: Cut strips 22mm wide and 2m long, attach them to an aluminum plate, apply an epoxy coating with a thickness of 300-400μm using electrostatic spraying, cure in a 200℃ curing oven for 30 minutes, remove and let stand for 3 hours, then perform rapid film removal at a speed of 30m / min, and observe for brittle fracture and residual adhesive.
[0039] Table 1
[0040] As shown in Table 1, the masking tapes prepared in Examples 1-5 of the present invention have good adhesion at room temperature, making it easy to firmly adhere to the object to be treated. The adhesion decreases significantly after high temperature, making it easy to peel off the film quickly. There is no brittle breakage or residue when peeling off the film quickly.
[0041] A comparison of Example 1 and Comparative Example 1 shows that when nitrile rubber is used instead of polyurethane rubber, the adhesion cannot be effectively reduced during high-temperature treatment, resulting in residual adhesive when the film is quickly peeled off. A comparison of Example 1, Comparative Example 2, and Comparative Example 3 shows that when nitrile rubber is not used, the adhesion between the PVC substrate and the PVC masking adhesive is weak, leading to residual adhesive problems when the film is quickly peeled off, and also causing brittle fracture during rapid peeling.
[0042] In summary, by introducing nitrile rubber as a component of the adhesive system, this invention effectively solves the long-standing technical problem of masking materials failing in oily environments. The resulting tape products exhibit unprecedented oil resistance, reliable bonding stability, and high adaptability to harsh industrial environments, with overall performance significantly superior to existing technologies.
[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A PVC material masking adhesive, characterized in that, By weight percentage, it comprises the following components: 15%~35% natural rubber, 15%~18% nitrile rubber, 8%~15% polyurethane, 4%~6% plasticizer, 0.5%~1% antioxidant, 3%~5% filler, and the remainder is solvent.
2. The PVC material masking adhesive according to claim 1, characterized in that: The plasticizer includes at least one of dioctyl terephthalate, citrate, epoxy ester, phthalate and naphthenic oil.
3. The PVC material masking adhesive according to claim 1, characterized in that: The antioxidant is at least one of alkyl diphenylamine, naphthylamine, and zinc dialkyl dithiophosphate.
4. The PVC material masking adhesive according to claim 1, characterized in that: The filler includes at least one of calcium carbonate and fumed silica.
5. The PVC material masking adhesive according to claim 1, characterized in that: The solvent includes either toluene or xylene.
6. A PVC material masking adhesive, characterized in that, By weight percentage, it comprises the following components: 15%~35% natural rubber, 15%~18% nitrile rubber, 8%~15% polyurethane, 1%~3% plasticizer, 2%~3% antioxidant, 3%~5% filler, and the remainder is solvent.
7. The PVC material masking adhesive according to claim 6, characterized in that: The plasticizer includes at least one of dioctyl terephthalate and phthalate.
8. The PVC material masking adhesive according to claim 6, characterized in that: The antioxidant is at least one of alkyl diphenylamine, naphthylamine, and zinc dialkyl dithiophosphate.
9. The PVC material masking adhesive according to claim 6, characterized in that: The solvent includes either toluene or xylene.
10. A method for preparing a PVC material masking adhesive according to any one of claims 1-9, characterized in that: Includes the following steps: S1. Add 15%~35% natural rubber, 15%~18% nitrile rubber, 8%~15% polyurethane, 1%~2% plasticizer, 0.5% antioxidant, 3%~5% filler, and sufficient solvent to a mixing tank and stir for 30 minutes to obtain the first mixture. S2. Add the first mixture to the reactor, heat it to 65℃~80℃, then add the remaining plasticizer to the reactor and react for 20 minutes to obtain the second mixture, and wait for the temperature to drop to 45℃~55℃. S3. Add the remaining antioxidant to the second mixture in the reactor and stir for 20 minutes to obtain the third mixture. S4. Cool the third mixture to 23℃~25℃, and then adjust the pH to 8-9 with alkaline solution; S5. After filtering with a 20-30 mesh filter, the PVC material masking adhesive is obtained.