High-initial-adhesion residue-free adhesive, paper pressure-sensitive adhesive and manufacturing method thereof

Abstract

The invention discloses a high-initial-adhesion residue-free adhesive and paper pressure-sensitive adhesive and a manufacturing method thereof, and relates to the field of material chemistry, and the formula of the pressure-sensitive adhesive comprises the following components in parts by mass: 5 parts of a pre-emulsion 374.8, 57.3 parts of acrylic acid, 57.3 parts of EGDMA ethylene glycol dimethacrylate, 0.64 part of mercaptan, 22 parts of ammonium persulfate, 10 parts of polyvinyl alcohol, 3.2 parts of sodium bicarbonate, 6.4 parts of a seeding emulsifier SA-7 and 3.4 parts of tert-butyl. 3.4 parts of sodium hydrogen sulfite, 10-15 parts of organic amine, 13 parts of ammonia water, 18 parts of a wetting agent, 18 parts of a defoaming agent and 4080 parts of deionized water. The paper pressure-sensitive adhesive prepared according to the formula and the preparation method provided by the invention can achieve the effect of no residual adhesive in a high initial adhesion state.

Description

Technical Field

[0001] The invention relates to the field of materials, in particular to a high initial viscosity and non-residue adhesive and a paper pressure-sensitive adhesive and a preparation method thereof. Background Art

[0002] Compared with general tape, paper tape has a surface made of paper. Usually, it is not very sticky and is easy to tear or fall off. Therefore, the market tries to solve the problem of low initial adhesion and develops Japanese paper pressure-sensitive adhesive with high initial adhesion. However, such Japanese paper will have residue after being torn off. The market needs Japanese paper pressure-sensitive adhesive with good initial adhesion and good lasting adhesion, easy to adhere to various surfaces, low labor intensity, and can firmly fix the masking film and masking paper in the required position to avoid sliding and falling off. At the same time, the market needs Japanese paper pressure-sensitive adhesive with no residue after being torn off; the present invention solves these two problems at the same time. Summary of the invention

[0003] To overcome the deficiencies of the prior art, the present invention aims to provide a high initial tack and no residual adhesive Japanese paper pressure-sensitive adhesive and a method for manufacturing the same. The Japanese paper pressure-sensitive adhesive of the present invention can achieve the effect of no residual adhesive in the state of high initial tack.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] High initial viscosity and no residual adhesive and paper pressure-sensitive adhesive, including, by mass: 5,374.8 parts of pre-emulsion, 57.3 parts of acrylic acid, 57.3 parts of EGDMA dimethacrylate, 0.64 parts of mercaptan, 22 parts of ammonium persulfate, 10 parts of polyvinyl alcohol, 3.2 parts of sodium bicarbonate, 6.4 parts of seed emulsifier SA-7, 3.4 parts of tert-butyl, 3.4 parts of sodium bisulfite, 10-15 parts of organic amine, 13 parts of ammonia water, 18 parts of wetting agent, 18 parts of defoaming agent, and 4080 parts of deionized water.

[0006] The above-mentioned high initial viscosity and non-residue adhesive and paper pressure-sensitive adhesive, the pre-emulsion includes, by mass, 12.8 parts of dodecylphenol polyoxyethylene ether, 64 parts of pre-emulsifier, 4808 parts of butyl ester, 382 parts of methyl ester, and 108 parts of hydroxyethyl ester.

[0007] High initial viscosity and no residual adhesive and paper pressure-sensitive adhesive and a manufacturing method thereof, comprising the following steps:

[0008] Step 1, prepare a pre-emulsion, add 1500 parts of deionized water, 64 parts of pre-emulsifier, 12.8 parts of dodecylphenol polyoxyethylene ether in an emulsification kettle and stir for 30 minutes, add 4808 parts of butyl ester, 382 parts of methyl methacrylate, 57.3 parts of EGDMA dimethacrylate glycol ester, 57.3 parts of acrylic acid, and 108 parts of hydroxyethyl ester and stir to increase by 40%, keep for 30 minutes, and set aside;

[0009] Step 2, seeding: add 2200 parts of hot deionized water, 10 parts of dissolved polyvinyl alcohol solution, 3.2 parts of sodium bicarbonate, and 6.4 parts of seeding emulsifier to the bottom of the reactor, stir and turn on 25%, keep for 15 minutes, keep the temperature at 80-82 degrees Celsius, add 278 parts of pre-emulsion, prepare 10 parts of ammonium persulfate and 200 parts of deionized water to dissolve into solution, add, record the temperature, and stay for 30 minutes;

[0010] Step 3, at the same time in the pot, add 12 parts of ammonium persulfate and 0.64 parts of mercaptan to the remaining pre-emulsion, stir for 15 minutes, and stop the machine to obtain a standby emulsion;

[0011] Step 4, dripping: when the temperature of the reactor rises to 80-82 degrees Celsius, start dripping the spare emulsion in step 3, the dripping speed is 14-15kg / min in the first 10 minutes, and the dripping speed is gradually adjusted to 28kg-30kg / min within 10 minutes, the dripping time is 4 hours to 4.5 hours, and the temperature is controlled at 82-84 degrees Celsius; pay attention to the switch control of steam and cooling water to prevent over-dripping;

[0012] Step 5: After the addition is completed, if the temperature rises, keep the temperature at 85 degrees Celsius for 1 hour;

[0013] Step 6, cool to 72 degrees Celsius, add 3.4 parts of tert-butyl for 15 minutes, and keep warm for 15 minutes;

[0014] Step 7, add 3.4 parts of sodium bisulfite for 10 minutes and keep warm for 30 minutes;

[0015] Step 8, cool down to 65 degrees, add 18 parts of wetting agent and 18 parts of defoaming agent mixed solution, and stir for 30 minutes;

[0016] Step nine, below 50 degrees, add organic amine, stir for 10 minutes, adjust the pH to about 6, and add ammonia water to adjust the pH to 7.5.

[0017] The high initial viscosity and non-residue adhesive and paper pressure-sensitive adhesive, the dodecylphenol polyoxyethylene ether is dodecylphenol polyoxyethylene ether OP10.

[0018] The above-mentioned high initial viscosity and no residual adhesive paper pressure-sensitive adhesive has a pre-emulsifier of SA-7.

[0019] The aforementioned high initial viscosity and no-residue adhesive and paper pressure-sensitive adhesive use SA-7 as the seed emulsifier.

[0020] The polyvinyl alcohol of the aforementioned high initial viscosity and non-residue adhesive and paper pressure-sensitive adhesive is PVA2099.

[0021] The present invention is beneficial in that:

[0022] The Japanese paper pressure-sensitive adhesive prepared by the formula and the manufacturing method of the present invention can achieve the effect of no residual adhesive in the state of high initial adhesion;

[0023] The formula adopted by the present invention introduces polyvinyl alcohol to enhance the cohesion of the polymer, thereby greatly reducing the residual adhesive effect; at the same time, the polyvinyl alcohol and the pre-emulsion of the present invention have a synergistic effect in reducing the residual adhesive effect. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to specific embodiments.

[0025] The formula and manufacturing method of Example 1 produced sample 1:

[0026] High initial viscosity and no residual adhesive and paper pressure-sensitive adhesive and a manufacturing method thereof, comprising the following steps:

[0027] Step 1, prepare pre-emulsion, add 1500kg of deionized water, 64kg of SA-7, 12.8kg of OP10 into the emulsification kettle and stir for 30 minutes, add 4808kg of butyl ester, 382kg of methyl methacrylate, 57.3kg of acrylic acid, 108kg of hydroxyethyl ester, stir at 40%, keep for 30 minutes, and set aside;

[0028] Step 2: Seeding: Add 2200kg of hot deionized water, 10kg of PVA2099 dissolved solution, 3.2kg of sodium bicarbonate, and 6.4kg of SA-7 to the bottom of the R302A reactor, stir at 25%, keep the temperature at 80-82 degrees Celsius for 15 minutes, add 278kg of pre-emulsion, add 200kg of ammonium persulfate solution (c=5%), record the temperature, and stay for 30 minutes; Step 3: At the same time, in the R301 pot, add 1200kg of ammonium persulfate to the remaining pre-emulsion. kg, 0.64kg of mercaptan, stirring for 15 minutes, shut down to obtain a spare emulsion; step 4, dripping: when the temperature of the R302A reactor rises to 80-82 degrees Celsius, start dripping the spare emulsion of step 3, the dripping speed in the first 10 minutes is 14kg-15kg / minute, and the dripping speed is gradually adjusted to 28kg-30kg / minute within 10 minutes, the dripping time is 4 hours-4.5 hours, and the temperature is controlled at 82-84 degrees Celsius; pay attention to the switch control of steam and cooling water to prevent over-dripping;

[0029] Step 5: After the addition is completed, if the temperature rises, keep the temperature at 85 degrees Celsius for 1 hour; Step 6: Cool down to 72 degrees Celsius, add 3.4 kg of tert-butyl, keep the temperature for 15 minutes, and keep the temperature for 15 minutes;

[0030] Step 7, add 3.4 kg of sodium bisulfite for 10 minutes and keep warm for 30 minutes;

[0031] Step eight, cool down to 65 degrees, add 18kg of wetting agent and 18kg of defoaming agent to mix the solution, and stir for 30 minutes; the types of wetting agent and defoaming agent are not limited. In this embodiment, the wetting agent is OT-75 and the defoaming agent is WBA.

[0032] Step nine, below 50 degrees, add organic amine, stir for 10 minutes, adjust the pH to about 6, and add ammonia water to adjust the pH to 7.5.

[0033] The formulation and manufacturing method of Comparative Example 1 are basically the same as those of Example 1, except for step 1.

[0034] In step 1 of Comparative Example 1, a pre-emulsion was prepared. 1500 kg of deionized water and 64 kg of SA-7 were added to an emulsifying kettle and stirred for 30 minutes. 4808 kg of butyl ester, 382 kg of methyl methacrylate, 57.3 kg of acrylic acid and 108 kg of hydroxyethyl ester were added and stirred at 40%. The mixture was kept for 30 minutes and set aside. The pre-emulsion of Comparative Example 1 lacked 12.8 kg of OP10.

[0035] The formulation and manufacturing method of Comparative Example 2 are basically the same as those of Example 1, except for step 1.

[0036] Comparative Example 2, step 1, prepare pre-emulsion, add deionized water 1500kg, SA-7 add 64kg, OP10 add 12.8kg in the emulsification kettle and stir for 30 minutes, add methyl methacrylate 382kg, acrylic acid 57.3kg, hydroxyethyl ester 108kg, stir at 40%, keep for 30 minutes, and set aside; butyl ester 4808kg is missing.

[0037] The formulation and manufacturing method of Comparative Example 3 are basically the same as those of Example 1, except for step 1.

[0038] Comparative Example 3, step 1, prepare pre-emulsion, add deionized water 1500kg, SA-764kg, OP10 12.8kg in the emulsification kettle and stir for 30 minutes, add methyl methacrylate 382kg, acrylic acid 57.3kg, hydroxyethyl ester 108kg, stir at 40%, keep for 30 minutes, and set aside; butyl ester 4808kg is missing.

[0039] The formulation and manufacturing method of Comparative Example 4 are basically the same as those of Example 1, except for step 1.

[0040] Comparative Example 4, step 1, prepare pre-emulsion, add deionized water 1500kg, SA-7 add 64kg, OP add 1012.8kg in the emulsification kettle and stir for 30 minutes, add butyl 4808kg, methyl methacrylate 382kg, hydroxyethyl ester 108kg, stir at 40%, keep for 30 minutes, and set aside; lack of acrylic acid 57.3kg.

[0041] These samples were tested for peel strength, initial adhesion, residual adhesive effect and viscosity together with ordinary Japanese paper pressure-sensitive adhesive. The test results are shown in Table 1.

[0042] The test uses the following peel strength: GBT-2792, initial adhesion: GBT-4852, and sustained adhesion: GBT-4851.

[0043] Residual glue effect: stick the tape on a special steel plate for peeling force test, put it in an 80℃ oven for 1 hour, take it out and cool it to room temperature, keep the speed of 50mm / min and peel it 180°, and compare the residual glue on the steel plate with the original bonding area.

[0044] Table 1-Parameter test table of sample 1 and multiple comparison samples

[0045]

[0046] From the above experimental results, it can be seen that the samples prepared according to the formula and manufacturing method of the present invention have both high initial adhesion and no residual glue effect; from the results of the samples and the comparison samples, it can be seen that polyvinyl alcohol and the pre-emulsion of the present invention have a synergistic effect in reducing the residual glue.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

1. A high initial viscosity and no residual adhesive Japanese paper pressure-sensitive adhesive, characterized in that: In terms of mass proportions, it includes: 5,374.8 parts of pre-emulsion, 57.3 parts of acrylic acid, 57.3 parts of EGDMA dimethacrylate, 0.64 parts of mercaptan, 22 parts of ammonium persulfate, 10 parts of polyvinyl alcohol, 3.2 parts of sodium bicarbonate, 6.4 parts of seed emulsifier SA-7, 3.4 parts of tert-butyl, 3.4 parts of sodium bisulfite, 10-15 parts of organic amine, 13 parts of ammonia water, 18 parts of wetting agent, 18 parts of defoaming agent, and 4080 parts of deionized water.

2. The high initial viscosity and no residual adhesive and paper pressure-sensitive adhesive according to claim 1, characterized in that: The pre-emulsion includes, by weight: 12.8 parts of dodecylphenol polyoxyethylene ether, 64 parts of pre-emulsifier, 4808 parts of butyl ester, 382 parts of methyl ester, and 108 parts of hydroxyethyl ester.

3. A high initial viscosity and no residual adhesive Japanese paper pressure-sensitive adhesive and a method for producing the same, characterized in that: Includes the following steps: Step 1, prepare a pre-emulsion, add 1500 parts of deionized water, 64 parts of pre-emulsifier, 12.8 parts of dodecylphenol polyoxyethylene ether into an emulsifying kettle, stir for 30 minutes, add 4808 parts of butyl ester, 382 parts of methyl methacrylate, 57.3 parts of acrylic acid, 108 parts of hydroxyethyl ester, stir to 40%, keep for 30 minutes, and set aside; Step 2: Seeding: Add 2200 parts of hot deionized water, 10 parts of dissolved polyvinyl alcohol solution, 3.2 parts of sodium bicarbonate, and 6.4 parts of seeding emulsifier to the bottom of the reactor, stir and increase by 25%, keep for 15 minutes, keep the temperature at 80 degrees Celsius-82 degrees Celsius, add 278 parts of pre-emulsion, prepare 10 parts of ammonium persulfate, and 200 parts of deionized water to dissolve into solution and add. Record the temperature and leave it for 30 minutes; Step 3, at the same time in the pot, add 12 parts of ammonium persulfate and 0.64 parts of mercaptan to the remaining pre-emulsion, stir for 15 minutes, and stop the machine to obtain a standby emulsion; Step 4, dripping: when the temperature of the reactor rises to 80-82 degrees Celsius, start dripping the standby emulsion in step 3, the dripping speed is 14kg-15kg / min in the first 10 minutes, and the dripping speed is gradually adjusted to 28kg-30kg / min within 10 minutes, the dripping time is 4 hours to 4.5 hours, and the temperature is controlled at 82-84 degrees Celsius; pay attention to the switch control of steam and cooling water to prevent over-dripping; Step 5: After the addition is completed, if the temperature rises, keep the temperature at 85 degrees Celsius for 1 hour; Step 6, cool to 72 degrees Celsius, add 3.4 parts of tert-butyl for 15 minutes, and keep warm for 15 minutes; Step 7, add 3.4 parts of sodium bisulfite for 10 minutes and keep warm for 30 minutes; Step 8, cooling to 65 degrees Celsius, adding 18 parts of a wetting agent and 18 parts of a defoaming agent mixed solution, and stirring for 30 minutes; Step nine, below 50 degrees, add organic amine, stir for 10 minutes, adjust the pH to about 6, and add ammonia water to adjust the pH to 7.

5.

4. The high initial viscosity and no residual adhesive and paper pressure-sensitive adhesive according to claim 2 or 4, characterized in that: The polyoxyethylene dodecylphenol ether is polyoxyethylene dodecylphenol ether OP10.

5. The high initial viscosity and no residual adhesive and paper pressure-sensitive adhesive according to claim 2 or 4, characterized in that: The pre-emulsifier is SA-7.

6. The high initial viscosity and no residual adhesive and paper pressure-sensitive adhesive according to claim 1 or 4, characterized in that: The seeding emulsifier is SA-7.

7. The high initial viscosity and no residual adhesive and paper pressure-sensitive adhesive according to claim 1 or 4, characterized in that: The polyvinyl alcohol is PVA2099.

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