A solvent-based carbon battery sealing adhesive and preparation method thereof

Abstract

The invention discloses a solvent-based carbon battery sealing adhesive, which comprises the following components: chlorinated paraffin, high-chlorinated polyethylene resin, tackifying resin, aromatic oil, solvent gasoline, and dye. A preparation method of the solvent-based carbon battery sealing adhesive comprises the following steps: adding chlorinated paraffin 42#, aromatic oil and solvent gasoline, and heating to 55-65°C; adding high-chlorinated polyethylene resin, modified epoxy resin and dye, and stirring to dissolve; stirring for 3-5 hours, sampling and testing after complete dissolution; filtering with a 60-mesh filter net after passing the test, and barreling; the solvent-based carbon battery sealing adhesive and the preparation method thereof adopt high-chlorinated polyethylene resin to add plasticizer, tackifying resin, organic solvent and dye, etc., to prepare a solvent-based battery sealing adhesive, which meets the use requirements of carbon battery customers.

Description

Technical Field

[0001] The invention relates to a solvent-type carbon battery sealing adhesive and a preparation method thereof. Background Art

[0002] Carbon battery, also known as zinc-manganese battery, is the most common dry battery at present. Battery sealing glue plays an important role in zinc-manganese battery, and the quality of battery sealing directly determines the quality of the battery. In recent years, battery manufacturers have gradually switched to the coating sealing method, that is, applying a thin layer of sealing glue on the upper part of the zinc cylinder and carbon rod, with a small amount of use, which increases the capacity of the battery. Zinc-manganese battery sealing glue mainly includes rubber series and asphalt series. The rubber series battery sealing glue is compounded with a variety of polymer materials such as rubber and other components. It has good creep resistance and sealing properties, and can improve the storage stability of the battery, but the cost is very high. When using it, it needs to be heated to about 140℃~150℃ for glue coating, and the energy consumption is large; the asphalt series battery sealing glue is mainly asphalt, and is blended with rosin, petroleum resin and modified epoxy resin. It has good creep resistance and sealing properties, low price, but poor aging resistance, and needs to be heated to about 100℃ when used. Some domestic manufacturers have purchased battery production equipment without heating equipment, so they can only use solvent-based battery sealing glue.

[0003] High chlorinated polyethylene resin (HCPE) is a high molecular polymer with excellent comprehensive properties. Its excellent chemical and physical properties make it a raw material for producing a new generation of rust-resistant and decorative coatings with multiple functions. The molecular structure of high chlorinated polyethylene resin does not contain double bonds, which determines its good corrosion resistance, chemical resistance, water resistance, especially low permeability to water vapor and oxygen; it has strong adhesion to steel surfaces and excellent adhesion. The characteristics of high chlorinated polyethylene are just suitable for sealing carbon batteries, but there are currently no related products. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a solvent-based battery sealing adhesive prepared by adding a plasticizer, a tackifying resin, an organic solvent and a dye to a high-chlorinated polyethylene resin to meet the usage requirements of carbon battery customers and a preparation method thereof.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A solvent-based carbon battery sealing adhesive comprises the following ingredients: chlorinated paraffin, highly chlorinated polyethylene resin, tackifying resin, aromatic oil, solvent gasoline and dye.

[0007] Preferably, the following ingredients are included in parts by weight: chlorinated paraffin: 50 to 70 parts, high chlorinated polyethylene resin: 10 to 20 parts, tackifying resin: 1 to 10 parts, aromatic oil: 10 to 20 parts, solvent gasoline: 5 to 20 parts, and dye: 0.05 to 0.5 parts.

[0008] Preferably, the following components are included in parts by weight: chlorinated paraffin: 60 parts, high chlorinated polyethylene resin: 13 parts, tackifier resin: 4 parts, aromatic oil: 13 parts, solvent gasoline: 10 parts, and dye: 0.1 part.

[0009] Preferably, the following components are included in parts by weight: chlorinated paraffin: 57 parts, high chlorinated polyethylene resin: 14 parts, tackifying resin: 4 parts, aromatic oil: 14 parts, solvent gasoline: 10 parts, and dye: 0.1 part.

[0010] Preferably, the following components are included in parts by weight: chlorinated paraffin: 59 parts, high chlorinated polyethylene resin: 13 parts, tackifier resin: 4 parts, aromatic oil: 13 parts, solvent gasoline: 11 parts, and dye: 0.1 parts.

[0011] Preferably, the following components are included in parts by weight: chlorinated paraffin: 65 parts, high chlorinated polyethylene resin: 11 parts, tackifier resin: 4 parts, aromatic oil: 12 parts, solvent gasoline: 8 parts, and dye: 0.1 parts.

[0012] Preferably, the tackifying resin is any one of rosin glycerol ester, petroleum resin, dehydrated malic anhydride resin, and modified epoxy resin.

[0013] Preferably, the chlorinated paraffin is chlorinated paraffin 42#.

[0014] Preferably, the solvent gasoline is No. 150 solvent.

[0015] Another technical problem to be solved by the present invention is to provide a method for preparing a solvent-based carbon battery sealing adhesive, comprising the following steps:

[0016] Add chlorinated paraffin 42#, aromatic oil and solvent gasoline, and heat to 55-65℃;

[0017] Add high chlorinated polyethylene resin, modified epoxy resin and dye, stir and dissolve;

[0018] Stir for 3-5 hours, and sample and test after complete dissolution;

[0019] After passing the test, filter it with a 60-mesh filter and put it into a barrel.

[0020] Chlorinated paraffin: Since high chlorinated polyethylene resin is hard and brittle, chlorinated paraffin is usually used as a plasticizer to improve the flexibility and adhesion of the paint film and overcome the shortcomings of being hard, brittle and easy to crack. Chlorinated paraffin is a golden yellow, colorless and transparent viscous body. It is non-toxic, odorless, non-flammable, insoluble in water and alcohol. Its average composition is C15H26Cl6, the average molecular weight is 420, the chlorine content is 48% to 52%, the freezing point is lower than -30°C, and the thermal decomposition temperature is 140°C. Chlorinated paraffin is in sufficient supply and low price. Chlorinated paraffin-42# is used as a plasticizer for carbon battery sealing glue in an amount of 50 to 70 parts (by weight);

[0021] High chlorinated polyethylene resin: High chlorinated polyethylene resin is a high molecular polymer with excellent comprehensive properties. Its excellent chemical and physical properties make it a raw material for producing a new generation of rust-resistant and decorative coatings with multiple functions. It replaces chlorinated rubber, perchlorinated ethylene and other materials, and is mainly used in anti-corrosion coatings applied to the surface of protected objects. High chlorinated polyethylene resin has good corrosion resistance, waterproofness, weather resistance and flame retardancy. The dosage is 10 to 20 parts (by weight);

[0022] Thickening resin: Highly chlorinated polyethylene resin is a thermoplastic brittle resin. The paint film formed alone has poor flexibility and is easy to crack and peel off. Usually, plasticizers and thickening resins are added to improve its physical and mechanical properties. There are many resins that are compatible with high-chlorinated polyethylene resin, such as rosin glycerol ester, petroleum resin, dehydrated malic anhydride resin, modified epoxy resin, etc. Modified epoxy resin can not only improve the adhesion of high-chlorinated polyethylene anticorrosive coatings, but also has the function of stabilizing HCl. Therefore, modified epoxy resin is preferred as the thickening resin for carbon battery sealing glue, and the amount used is 1 to 10 parts (by weight);

[0023] Aromatic oil: The solvent is crucial to the solubility of the resin. Highly chlorinated polyethylene resin is insoluble in aliphatic hydrocarbons and alcohol solvents, but soluble in aromatic hydrocarbons, chlorinated hydrocarbons, esters and ketone solvents. Commonly used solvents include toluene, xylene, aromatic oil, butyl acetate, etc. Aromatic oil is preferred as the solvent for carbon battery sealing glue, and the dosage is 10 to 20 parts (by weight);

[0024] Solvent gasoline: Aromatic oil alone is used as a solvent, which has a strong odor and is not environmentally friendly. Adding a certain proportion of solvent gasoline can reduce the odor and further dilute the viscosity of the sealing glue to ensure that the battery sealing glue has appropriate fluidity for suitable coating. Solvent gasoline is preferred as the solvent for carbon battery sealing glue, and the amount used is 5 to 20 parts (by weight);

[0025] Dye: The carbon battery glue coating machine has a fast glue coating speed. In order to facilitate the observation of whether the battery is coated with glue and whether the glue is broken, the battery manufacturer requires that the battery sealing glue be dyed red. Therefore, red dye is added in an amount of 0.05 to 0.5 parts (by weight).

[0026] The beneficial effects of the present invention are:

[0027] The carbon battery sealing glue is easy to use, does not need to be heated, and is easy to apply; the carbon battery sealing glue has good adhesion, creep resistance, aging resistance, no deformation or flow at high temperatures, and no cracking at low temperatures, thereby improving the storage stability of the battery and extending the service life of the battery. The preparation method of the sealing glue is simple, the process flow is short, the cost is low, and it is easy to realize industrialization. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below, and the examples are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described more specifically by way of example in the following paragraphs. According to the following description and claims, the advantages and features of the present invention will become clearer.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] Example 1

[0031] A method for preparing a solvent-based carbon battery sealing adhesive comprises the following steps:

[0032] Step 1: First, place 60 parts of chlorinated paraffin 42#, 13 parts of aromatic oil, and 10 parts of solvent gasoline in a blending tank, start heating the heat transfer oil, start mechanical stirring, and raise the temperature to 55℃~60℃;

[0033] Step 2: Add 13 parts of high chlorinated polyethylene resin, 4 parts of modified epoxy resin and 0.1 parts of red dye, start stirring, and keep the temperature at 55℃~60℃;

[0034] Step 3: Stir for 4 hours until the solution is completely dissolved, and then take samples for testing;

[0035] Step 4: After passing the test, filter with a 60-mesh filter and barrel.

[0036] Example 2

[0037] A method for preparing a solvent-based carbon battery sealing adhesive comprises the following steps:

[0038] Step 1: First, place 57 parts of chlorinated paraffin 42#, 14 parts of aromatic oil, and 10 parts of solvent gasoline in a blending tank, start heating the heat transfer oil, start mechanical stirring, and raise the temperature to 55℃~60℃;

[0039] Step 2: Add 15 parts of high chlorinated polyethylene resin, 4 parts of modified epoxy resin and 0.1 parts of red dye, start stirring, and keep the temperature at 55℃~60℃;

[0040] Step 3: Stir for 4 hours until the solution is completely dissolved, and then take samples for testing;

[0041] Step 4: After passing the test, filter with a 60-mesh filter and barrel.

[0042] Example 3

[0043] A method for preparing a solvent-based carbon battery sealing adhesive comprises the following steps:

[0044] Step 1: First, place 59 parts of chlorinated paraffin 42#, 13 parts of aromatic oil, and 11 parts of solvent gasoline in a blending tank, start heating the heat transfer oil, start mechanical stirring, and raise the temperature to 55℃~60℃;

[0045] Step 2: Add 13 parts of high chlorinated polyethylene resin, 4 parts of modified epoxy resin and 0.1 parts of red dye, start stirring, and keep the temperature at 55℃~60℃;

[0046] Step 3: Stir for 4 hours until the solution is completely dissolved, and then take samples for testing;

[0047] Step 4: After passing the test, filter with a 60-mesh filter and barrel.

[0048] Example 4

[0049] A method for preparing a solvent-based carbon battery sealing adhesive comprises the following steps:

[0050] Step 1: Place 65 parts of chlorinated paraffin 42#, 12 parts of aromatic oil, and 8 parts of solvent gasoline in a blending tank, start heating the heat transfer oil, start mechanical stirring, and raise the temperature to 55℃~60℃;

[0051] Step 2: Add 11 parts of high chlorinated polyethylene resin, 4 parts of modified epoxy resin and 0.1 parts of red dye, start stirring, and keep the temperature at 55℃~60℃;

[0052] Step 3: Stir for 4 hours until the solution is completely dissolved, and then take samples for testing;

[0053] Step 4: After passing the test, filter with a 60-mesh filter and barrel.

[0054] Comparative Example 1

[0055] A method for preparing a solvent-based carbon battery sealing adhesive comprises the following steps:

[0056] Step 1: First, place 60 parts of chlorinated paraffin 42#, 13 parts of aromatic oil, and 10 parts of solvent gasoline in a blending tank, start heating the heat transfer oil, start mechanical stirring, and raise the temperature to 55℃~60℃;

[0057] Step 2: Add 13 parts of high chlorinated polyethylene resin and 0.1 parts of red dye, start stirring, and keep the temperature at 55℃~60℃;

[0058] Step 3: Stir for 4 hours until the solution is completely dissolved, and then take samples for testing;

[0059] Step 4: After passing the test, filter with a 60-mesh filter and barrel.

[0060] Comparative Example 2

[0061] A method for preparing a solvent-based carbon battery sealing adhesive comprises the following steps:

[0062] Step 1: First, place 60 parts of chlorinated paraffin 42# and 13 parts of aromatic oil in a blending tank, start heating the heat transfer oil, start mechanical stirring, and raise the temperature to 55℃~60℃;

[0063] Step 2: Add 13 parts of high chlorinated polyethylene resin, 4 parts of modified epoxy resin and 0.1 parts of red dye, start stirring, and keep the temperature at 55℃~60℃;

[0064] Step 3: Stir for 4 hours until the solution is completely dissolved, and then take samples for testing;

[0065] Step 4: After passing the test, filter with a 60-mesh filter and barrel.

[0066] Experimental example

[0067] Experimental subjects

[0068] The sealing glue prepared in Examples 1-4;

[0069] The sealing glue prepared in Comparative Example 1-2;

[0070] Solvent-based battery sealing glue currently on the market;

[0071] Adhesion performance test

[0072] The bonding strength of various sealants was evaluated using a tensile testing machine.

[0073] The prepared bonded sample was clamped between the jaws of a tensile testing machine and subjected to a standard tensile test.

[0074] During the test, the tensile force and elongation are recorded to calculate the tensile bond strength (maximum tensile force over the bond area).

[0075] Peel strength test

[0076] The adhesion of the sealant to the substrate was evaluated using a standard peel test method;

[0077] During the test, the peel force is recorded and the bond strength between the adhesive and the substrate is evaluated.

[0078] The test results are shown in Table 1.

[0079] Table 1

[0080]

[0081] In Examples 1 to 4, the tested sealants exhibited relatively consistent performance in terms of tensile bonding strength, with an average value of about 2.2 MPa. This result shows that these sealants can provide stable and reliable bonding performance when facing tensile stress. In terms of peel strength, the sealants of Examples 1 to 4 exhibit an average peel strength of about 145 N / cm. This data shows that these sealants have good peel resistance on the bonding surface and can maintain stable bonding performance when facing peel stress; while the sealants of Comparative Examples 1 and 2 have tensile bonding strengths of 1.5 MPa and 1.7 MPa, respectively, which are slightly lower than the average values ​​of Examples 1 to 4. When subjected to tensile stress, the bonding performance of these two sealants is relatively weak, and in terms of peel strength, the sealants of Comparative Examples 1 and 2 exhibit peel strengths of 130 N / cm and 135 N / cm, respectively, which are slightly lower than those of Examples 1 to 4. For solvent-based sealants on the market, their tensile bonding strength is slightly higher than that of other test samples, reaching 1.8 MPa.

[0082] Creep resistance test solution

[0083] To ensure the rigor and accuracy of the test, first prepare a sealing glue sample strip or block of standard size. Then, adjust the thermostat to room temperature to provide a stable test environment. Next, place the sealing glue prepared in Examples 1 to 4, the sealing glue prepared in Comparative Examples 1 to 2, and the common solvent-based battery sealing glue on the market in the creep test mold, and apply the corresponding load.

[0084] Within the predetermined time interval after the start of loading, the deformation of each sample should be closely monitored and recorded. At the same time, the loading amount and the corresponding sample deformation at each time point should be recorded.

[0085] According to the time node or loading duration set in the experimental design, the creep rate of each sealant sample will be accurately calculated. Finally, by comparing the creep rate data of different sealants, the creep resistance of each sample under long-term pressure will be comprehensively evaluated.

[0086] The test results are as follows

[0087] Table 2

[0088]

[0089] From the above table, it can be concluded that the sealant of Example 2 performs better in creep resistance because its deformation at all time points is relatively low, especially under long-term and high-load conditions, its performance stability is better. Compared with the sealants on the market, the sealant of Example 2 has a lower deformation, indicating that it may be more durable and stable under long-term pressure.

[0090] The above embodiments of the present invention are not intended to limit the protection scope of the present invention, and the implementation modes of the present invention are not limited thereto. All other modifications, replacements or changes made to the above structures of the present invention based on the above contents of the present invention, in accordance with common technical knowledge and customary means in the art, without departing from the above basic technical ideas of the present invention, should fall within the protection scope of the present invention.

Claims

1. A solvent-based carbon battery sealing adhesive, characterized in that: The invention comprises the following components in parts by weight: chlorinated paraffin: 50 to 70 parts, highly chlorinated polyethylene resin: 10 to 20 parts, tackifying resin: 1 to 10 parts, aromatic oil: 10 to 20 parts, solvent gasoline: 5 to 20 parts, and dye: 0.05 to 0.5 parts; the tackifying resin is a modified epoxy resin, and the usage amount is 1 to 10 parts by weight.

2. The solvent-based carbon battery sealing adhesive according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 60 parts of chlorinated paraffin, 13 parts of highly chlorinated polyethylene resin, 4 parts of tackifying resin, 13 parts of aromatic oil, 10 parts of solvent gasoline and 0.1 parts of dye.

3. The solvent-based carbon battery sealing adhesive according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 57 parts of chlorinated paraffin, 14 parts of highly chlorinated polyethylene resin, 4 parts of tackifying resin, 14 parts of aromatic oil, 10 parts of solvent gasoline and 0.1 parts of dye.

4. The solvent-based carbon battery sealing adhesive according to claim 1, characterized in that: The invention comprises the following components in parts by weight: chlorinated paraffin: 59 parts, highly chlorinated polyethylene resin: 13 parts, tackifying resin: 4 parts, aromatic oil: 13 parts, solvent gasoline: 11 parts, and dye: 0.1 parts.

5. The solvent-based carbon battery sealing adhesive according to claim 1, characterized in that: The invention comprises the following components in parts by weight: chlorinated paraffin: 65 parts, highly chlorinated polyethylene resin: 11 parts, tackifying resin: 4 parts, aromatic oil: 12 parts, solvent gasoline: 8 parts, and dye: 0.1 parts.

6. The solvent-based carbon battery sealing adhesive according to claim 1, characterized in that: The chlorinated paraffin is chlorinated paraffin 42#.

7. The solvent-based carbon battery sealing adhesive according to claim 1, characterized in that: The solvent gasoline is No. 150 solvent.

8. A method for preparing a solvent-based carbon battery sealing adhesive, characterized in that: The following steps are involved: Add 50-70 parts of chlorinated paraffin 42#, 10-20 parts of aromatic oil and 5-20 parts of solvent gasoline by weight, and heat to 55-65°C; Add 10 to 20 parts of high chlorinated polyethylene resin, 1 to 10 parts of modified epoxy resin and 0.05 to 0.5 parts of dye by weight, stir and dissolve; Stir for 3-5 hours, and sample and test after complete dissolution; After passing the test, filter it with a 60-mesh filter and put it into a barrel.

Images