Antistatic glue liquid and application thereof

Abstract

The application provides an antistatic glue solution; ingredients of the antistatic glue solution include, by total weight, tackifying resin 0.8-4%, olefin copolymer 1.2-2.5%, cellulose 2-7%, organic antistatic agent 3-6%, plasticizer 0.3-1.2%, antioxidant 0.3-1%, ester substance 0.7-2%, and solvent supplementing the rest to 100%. By optimizing the types and relative amounts of glue solution components, the prepared glue solution has good bonding performance and flow performance, and exhibits excellent antistatic effect in a low-humidity environment, antistatic retention time, and can be used in antistatic packaging products.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of functional adhesive, C09J9 / 00, and particularly relates to an antistatic glue solution and application thereof. BACKGROUND

[0002] Any object has its own positive or negative charge, and the aggregation of these charges will seriously affect industrial production and product quality. Therefore, how to inhibit and avoid the accumulation of static electricity and the occurrence of static electricity is very important. Antistatic glue products as bonding materials in static places are increasingly valued by the relevant industry. At present, the antistatic performance of glue products is generally given by inorganic fillers such as metals and carbon materials. However, these substances are incompatible with other substances in the glue formula, and the stability of the glue product will be affected. In addition, the antistatic glue is easily affected by humidity. When the environmental humidity is high, the surface resistance of the glue layer can reach a good value, but for low humidity environment, its surface resistance is basically higher than 10 12 Ohm, which belongs to the range of insulators, and cannot discharge static electricity.

[0003] Chinese patent CN104774583A discloses an antistatic adhesive, which improves the stability, shear strength and antistatic effect of the adhesive by compounding benzoguanamine resin, polylactic acid resin, octylphenol polyoxyethylene ether, alkyl phosphate diethanolamine salt, polyaspartic acid, calcium sulfoaluminate and other substances. However, the antistatic time is not high. Chinese patent CN109294451A discloses an antistatic adhesive and its preparation process. The antistatic agent in the adhesive formula includes polyvinyl alcohol, poly-N-isopropyl acrylamide, a surfactant and a modifier, and the antistatic agent is fixed by acrylonitrile-butadiene-styrene copolymer to reduce the migration of the latter to the surface of the adhesive, thereby improving the antistatic effect. However, the antistatic effect in low humidity environment is still not enough. SUMMARY

[0004] To solve the above technical problems, the present application first provides an antistatic glue solution. The components of the antistatic glue solution include, by total weight: tackifying resin 0.8-4%, olefin copolymer 1.2-2.5%, cellulose 2-7%, organic antistatic agent 3-6%, plasticizer 0.3-1.2%, antioxidant 0.3-1%, ester substance 0.7-2%, and solvent supplementing the balance to 100%.

[0005] Further, the components of the antistatic glue solution include, by total weight: tackifying resin 0.9-2%, olefin copolymer 1.3-1.9%, cellulose 2.3-4.5%, organic antistatic agent 3.5-5.2%, plasticizer 0.5-1.0%, antioxidant 0.3-1%, ester substance 0.7-2%, and solvent supplementing the balance to 100%.

[0006] Further, the weight ratio of the tackifying resin, the cellulose, and the olefin copolymer is (0.9-1.5):(2.3-3.5):(1.3-1.9). The tackifying resin and the cellulose used in the present application produce a tackifying effect on the glue solution system. The polar groups in the structure of the tackifying resin and the cellulose, such as alcohol hydroxyl, phenolic hydroxyl, etc., produce intermolecular interactions such as hydrogen bonding, electrostatic interaction, etc. with the substrate, increasing the initial tack performance to the substrate. In addition, the intermolecular interactions and the entanglement of the molecular chains in itself construct a larger network crosslinking structure in the system, improving the tack holding performance of the glue solution. However, other flexible chain ends need to be added to the glue solution to participate in and regulate the intermolecular distance and network crosslinking strength of the tackifying resin and the cellulose, to improve the leveling performance of the glue solution, reduce the pitting phenomenon during gluing, make the glue layer smooth and flat, not only improve the bonding strength but also further enhance the antistatic effect. When the content of the tackifying resin and the cellulose is too much, the glue solution has high viscosity and poor leveling, increasing the construction difficulty. When the addition amount of the olefin copolymer is too high, the easy crystallization characteristics of the olefin copolymer will reduce the bonding strength of the glue layer and shorten the effective bonding period.

[0007] In a preferred embodiment, the weight ratio of the tackifying resin, the cellulose, and the olefin copolymer is 1.1:2.8:1.6.

[0008] In a preferred embodiment, the components of the antistatic glue solution include, by total weight: tackifying resin 1.1%, olefin copolymer 1.6%, cellulose 2.7%, organic antistatic agent 4.1%, plasticizer 0.7%, antioxidant 0.6%, ester substance 1.3%, and solvent to make up the balance to 100%.

[0009] Further, the tackifying resin is selected from at least one of polyurethane resin, epoxy resin, resorcinol-formaldehyde resin, polyacrylate, and polylactic acid resin.

[0010] Preferably, the tackifying resin is resorcinol-formaldehyde resin.

[0011] Preferably, the resorcinol-formaldehyde resin has a softening point of 100-110°C and a free resorcinol content of 0-0.5wt%, and is optionally an environmentally friendly Saint-Lacote A-250.

[0012] Further, the olefin copolymer includes, but is not limited to, at least one of styrene-ethylene-butadiene-styrene copolymer, ethylene-propylene copolymer, ethylene-octene copolymer, styrene-butadiene copolymer, polyisoprene, and polybutadiene.

[0013] Preferably, the olefin copolymer includes styrene-ethylene-butadiene-styrene copolymer and ethylene-propylene copolymer, and the weight ratio of the two is 1:(4-10), preferably 1:(5-8).

[0014] In one preferred embodiment, the styrene-ethylene-butadiene-styrene copolymer and the ethylene-propylene copolymer are in a weight ratio of 1 :7.

[0015] Further, the styrene-ethylene-butadiene-styrene copolymer has a melt flow rate at 230°C / 5.0 kg of 18-30 g / 10 min and an elongation at break of 400-800%.

[0016] In one embodiment, the styrene-ethylene-butadiene-styrene copolymer has a melt flow rate at 230°C / 5.0 kg of 22 g / 10 min and an elongation at break of 500%.

[0017] Preferably, the ethylene-propylene copolymer is Dowlex 5980.

[0018] Further, the cellulose comprises at least one of hydroxymethyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, hydroxymethyl propyl cellulose, and hydroxymethyl ethyl cellulose.

[0019] Further, the cellulose comprises carboxymethyl cellulose and hydroxypropyl methyl cellulose in a weight ratio of (0.45-0.82): 1.

[0020] In one preferred embodiment, the 2 wt% carboxymethyl cellulose has a viscosity of 800-1200 mpa-s at 25°C.

[0021] In one preferred embodiment, the hydroxypropyl methyl cellulose has an average molecular weight of 8-20 million, more preferably 8-15 million.

[0022] Further, the organic antistatic agent is an alkyl quaternary ammonium salt.

[0023] Further, the organic antistatic agent comprises a C16-C30 alkyl quaternary ammonium salt, which includes, but is not limited to, at least one of octadecyl dimethyl hydroxyethyl quaternary ammonium salt, dodecyl triethyl quaternary ammonium salt, tetradecyl trimethyl quaternary ammonium salt, hexadecyl trimethyl quaternary ammonium salt, octadecyl trimethyl quaternary ammonium salt, dodecyl dimethyl benzyl quaternary ammonium salt, behenyl trimethyl quaternary ammonium salt, and tributyl benzyl quaternary ammonium salt.

[0024] Further, the organic antistatic agent further comprises a C4-C15 alkyl quaternary ammonium salt; which includes, but is not limited to, at least one of tetramethyl quaternary ammonium salt, tetraethyl quaternary ammonium salt, dodecyl trimethyl quaternary ammonium salt, and tributyl methyl quaternary ammonium salt.

[0025] For antistatic agents, the conventional technical solutions generally use carbon materials, metals, metal oxides and other solid components, but the addition of these substances will significantly affect the bonding performance and leveling property of the adhesive product, resulting in quality problems of the adhesive product. The present application uses different types of organic antistatic agents to prolong the antistatic retention time of the antistatic adhesive and improve the antistatic effect of the antistatic adhesive. The C4-C15 alkyl quaternary ammonium salt molecules used in the present application are relatively small and incompatible in the adhesive system, and can easily migrate from the inside of the system to the surface. Under certain humidity conditions, the hydrophilic groups of the molecules combine with water through hydrogen bonds to form a conductive channel, which can effectively dissipate static electricity and reduce the surface resistivity of the adhesive layer. However, the antistatic property maintained by the small molecule quaternary ammonium salt alone is not enough, and the present application further adds C16-C30 alkyl quaternary ammonium salt with larger molecules. When added to the system, it will rely on its unique emulsification characteristics to arrange itself on the surface of the system and its hydrophilic group will face the outside air. A conductive network structure with permeability is formed in the system, and the relative content of the two is controlled to make the antistatic retention time and antistatic effect of the adhesive more excellent, even under low humidity conditions, it still has a relatively low resistivity. However, when the amount of C4-C15 alkyl quaternary ammonium salt is too large, it will affect the initial tack of the adhesive, and when the amount of C16-C30 alkyl quaternary ammonium salt is too large, it will affect the leveling performance of the adhesive.

[0026] Preferably, the organic antistatic agent is a combination of C16-C30 alkyl quaternary ammonium salt and C4-C15 alkyl quaternary ammonium salt, and the weight ratio of the two is 1:(9-18), preferably 1:(10-15).

[0027] In a preferred embodiment, the C16-C30 alkyl quaternary ammonium salt is dodecyl dimethyl benzyl quaternary ammonium salt.

[0028] In a preferred embodiment, the C4-C15 alkyl quaternary ammonium salt is tetramethyl quaternary ammonium salt.

[0029] Further, the components of the glue solution also include polytrifluoroethylene resin, and the addition amount is 0.1-0.5% of the total weight of the raw materials. In order to improve the antistatic ability of the glue solution, alkyl quaternary ammonium salt which can absorb moisture in the air and form a conductive film is added, but after absorbing moisture, the small molecules of water may cause excessive penetration and swelling of the glue layer, reduce the strength of the cross-linked structure inside the glue layer, and damage the bonding strength of the glue layer, therefore, the application needs to solve the contradictory problem between the antistatic effect and the long-lasting bonding strength of the glue layer. The application adds polytrifluoroethylene resin in the formula system, which participates in the construction of the cross-linked network system of the glue layer together with resorcinol-formaldehyde resin, cellulose, styrene-ethylene-butadiene-styrene copolymer, ethylene propylene copolymer, quaternary ammonium salt, etc., and the penetration degree of water molecules in the system is regulated by using the low water vapor permeability of polytrifluoroethylene resin, but the addition amount cannot be too much, otherwise it will reduce the antistatic effect of the glue solution.

[0030] Further, the plasticizer includes at least one of butyl benzyl phthalate, dioctyl phthalate, dibutyl phthalate, diisononyl phthalate.

[0031] Further, the plasticizer includes butyl benzyl phthalate.

[0032] Further, the antioxidant is 4,4'-thiobis(6-tert-butyl-m-cresol).

[0033] Further, the ester substance includes at least one of butyl methacrylate, butyl diglycol glutarate, phthalate ester, butyrolactone, trimethyl pentanediol diisobutyrate, acetyl tri-n-butyl citrate, dipropylene glycol dibenzoate, but not limited to.

[0034] Preferably, the ester substance includes butyl methacrylate, butyrolactone and butyl diglycol glutarate, and the weight ratio is (0.1-0.4):(0.5-0.9):(0.1-0.4). By compounding different ester substances, on the one hand, the solubilization effect of the raw materials in the system is produced, and on the other hand, the adhesion strength of the glue solution is increased.

[0035] In a preferred embodiment, the weight ratio of butyl methacrylate, butyrolactone and butyl diglycol glutarate is 0.3:0.7:0.3.

[0036] Further, the components of the antistatic glue solution also include pectin, which is selected from low methoxyl pectin and / or high methoxyl pectin; preferably low methoxyl pectin.

[0037] Further, the addition amount of the pectin is 0.2-1.6% of the total weight of the antistatic glue solution.

[0038] Further, the solvent includes water, alcohol substances and low molecular halogenated hydrocarbons.

[0039] Further, the alcohol substance includes, but is not limited to, at least one of ethanol, isopropanol, butanol, ethylene glycol, propylene glycol, glycerol, and the like, and the addition amount is 25-35% of the total weight of the glue solution.

[0040] Further, the low molecular halogenated hydrocarbon includes, but is not limited to, at least one of dichloroethane and trichloroethane, and the addition amount is 0.5-1.4% of the total weight of the glue solution.

[0041] Further, the components of the antistatic glue solution further include at least one of light stabilizers, anti-aging agents, defoaming agents, pH regulators, surfactants, and solubilizers. The present application does not have special requirements for the above substances, and they can be adjusted and used according to actual conditions.

[0042] Further, the components of the antistatic glue solution further include 0.5-3% of light stabilizers, and bisphenol A bis salicylate is preferred.

[0043] Further, the components of the antistatic glue solution further include 0.5-2% of defoaming agents, and anionic defoaming agents are preferred.

[0044] Further, the components of the antistatic glue solution further include 0.1-0.5% of pH regulators.

[0045] Further, the preparation method of the antistatic glue solution is to mix the solvent and the ester substance, then add other components, dissolve and mix evenly.

[0046] Further, the antistatic glue solution is used in anti-static packaging products.

[0047] Advantages

[0048] 1. The present application uses different types and contents of tackifying resins, cellulose and olefin copolymers to produce suitable intermolecular crosslinking of the glue solution, thereby improving the adhesion and flow properties of the glue solution.

[0049] 2. Unlike conventional technology, the present application uses alkyl quaternary ammonium salt as an antistatic agent to solve the problem of incompatibility of inorganic antistatic agents with the glue solution system; further optimization of alkyl quaternary ammonium salt includes C16-C30 alkyl quaternary ammonium salt and C4-C15 alkyl quaternary ammonium salt, and the weight ratio of the two is 1:(9-18), which simultaneously improves the antistatic ability of the glue solution from different angles and maintains the antistatic retention time of the glue solution (up to 2 years);

[0050] 3. The present application adds a certain content of polytrifluoroethylene resin to solve the contradiction between the increase of the antistatic effect of the glue solution and the water resistance of the glue layer, and maintain a good balance between the two.

[0051] 4、The application uses different ester substances to fully dissolve the components and regulate the cross-linking of the system. In addition, the addition of plasticizers, pectin and other components has a similar effect with the tackifying resins and cellulose in the system, and together participates in the network structure of the glue system to improve the bonding strength of the glue system.

[0052] 5、The antistatic glue of the application has excellent antistatic effect, even in a low humidity environment, it still has very low resistance, low friction and pressure, and fast dissipation time, and can be used in antistatic packaging products, and is simple and convenient to use and operate. DETAILED DESCRIPTION

[0053] EMBODIMENT

[0054] EMBODIMENT 1

[0055] The embodiment provides an antistatic glue; the components of the antistatic glue include, by total weight: 1.1% of tackifying resin, 1.6% of olefin copolymer, 2.7% of cellulose, 4.1% of organic antistatic agent, 0.2% of polytrifluoroethylene resin, 0.7% of butyl benzyl phthalate (plasticizer), 0.6% of 4,4'-thiobis (6-tert-butyl-m-cresol) (antioxidant), 1.3% of ester substance, 0.7% of low methoxyl pectin, 0.6% of bisphenol A bis salicylate, 1% of defoaming agent, 1% of pH regulator, and the rest is solvent to make up 100%.

[0056] The tackifying resin is resorcinol-formaldehyde resin, model: environmentally friendly Saint-Lacote A-250.

[0057] The olefin copolymer is styrene-ethylene-butadiene-styrene copolymer and ethylene-propylene copolymer, and the weight ratio of the two is 1:7; the melt flow rate of the styrene-ethylene-butadiene-styrene copolymer is 22 g / 10 min at 230℃ / 5.0 kg, the elongation at break is 500%, and the model is American Corterra FG1901 GT; the ethylene-propylene copolymer is Dow 5980.

[0058] The cellulose is carboxymethyl cellulose and hydroxypropyl methyl cellulose, and the weight ratio of the two is 0.69:1, the viscosity of 2wt% carboxymethyl cellulose at 25℃ is 1000 mpa·s; the average molecular weight of the hydroxypropyl methyl cellulose is 100,000.

[0059] The organic antistatic agent is a combination of dodecyl dimethyl benzyl ammonium chloride and tetramethyl ammonium chloride, and the weight ratio of the two is 1:12.67.

[0060] The polytrifluoroethylene resin is purchased from Hubei Xinhongli Chemical Co., Ltd., and the article number is LI1019.

[0061] The ester substance is butyl methacrylate, butyrolactone and butyl diglycol glutarate, with a weight ratio of 0.3:0.7:0.3.

[0062] The solvent is: 1.1% dichloroethane in total weight of antistatic glue, 30% isopropyl alcohol in total weight of antistatic glue, water (supplement the total weight of antistatic glue to 100%).

[0063] Secondly, the preparation method of the antistatic glue is: mixing the solvent and the ester substance, then adding other ingredients, dissolving and mixing evenly.

[0064] Example 2

[0065] The present embodiment provides an antistatic glue; the components of the antistatic glue include: tackifying resin 1.5%, olefin copolymer 1.3%, cellulose 2.3%, organic antistatic agent 5.2%, polytrifluoroethylene resin 0.5%, butyl benzyl phthalate (plasticizer) 1.0%, 4,4'-thiobis(6-tert-butyl-m-cresol) (antioxidant) 1%, ester substance 2%, low methoxyl pectin 0.2%, bisphenol A bis salicylate 0.5%, defoaming agent 0.5%, pH adjuster 0.5%, solvent supplementing the balance to 100% by weight.

[0066] The tackifying resin is resorcinol-formaldehyde resin, model: environmentally friendly Saint-Lacote A-250.

[0067] The olefin copolymer is styrene-ethylene-butadiene-styrene copolymer and ethylene-propylene copolymer, with a weight ratio of 1:8; the melt flow rate of the styrene-ethylene-butadiene-styrene copolymer at 230℃ / 5.0kg is 22g / 10min, the elongation at break is 500%, model: American Corterra FG1901 GT; the ethylene-propylene copolymer is Dow 5980.

[0068] The cellulose is carboxymethyl cellulose and hydroxypropyl methyl cellulose, with a weight ratio of 0.82:1, the viscosity of 2wt% carboxymethyl cellulose at 25℃ is 1000mpa·s; the average molecular weight of the hydroxypropyl methyl cellulose is 100,000.

[0069] The organic antistatic agent is a combination of dodecyl dimethyl benzyl ammonium chloride and tetramethyl ammonium chloride, with a weight ratio of 1:10.

[0070] The polytrifluoroethylene resin is purchased from Hubei Xinhongli Chemical Co., Ltd., and the item number is LI1019.

[0071] The ester substance is butyl methacrylate, butyrolactone and butyl diglycol glutarate, with a weight ratio of 0.1:0.9:0.4.

[0072] The solvent is: 0.5% dichloroethane, 35% isopropanol, water (supplementing the total weight of the antistatic glue to 100%).

[0073] Secondly, the preparation method of the antistatic glue is: mixing the solvent and ester substances, then adding other ingredients, dissolving and mixing evenly.

[0074] Example 3

[0075] The antistatic glue provided by the embodiment includes the following components by total weight: tackifying resin 0.9%, olefin copolymer 1.9%, cellulose 3.5%, organic antistatic agent 3.5%, polytrifluoroethylene resin 0.1%, butyl benzyl phthalate (plasticizer) 0.5%, 4,4'-thiobis (6-tert-butyl-m-cresol) (antioxidant) 0.3%, ester substance 2%, low-methoxyl pectin 0.2%, bisphenol A bisalicylate 2%, defoaming agent 1%, pH adjuster 0.1%, and solvent supplementing the rest to 100%.

[0076] The tackifying resin is resorcinol-formaldehyde resin, model: environmentally friendly Saint-Lacote A-250.

[0077] The olefin copolymer is styrene-ethylene-butadiene-styrene copolymer and ethylene-propylene copolymer, with a weight ratio of 1:5; the melt flow rate of the styrene-ethylene-butadiene-styrene copolymer at 230℃ / 5.0kg is 22g / 10min, the elongation at break is 500%, model: American Corterra FG1901 GT; the ethylene-propylene copolymer is Dow 5980.

[0078] The cellulose is carboxymethyl cellulose and hydroxypropyl methyl cellulose, with a weight ratio of 0.45:1, the viscosity of the 2wt% carboxymethyl cellulose at 25℃ is 1000mpa·s; the average molecular weight of the hydroxypropyl methyl cellulose is 100,000.

[0079] The organic antistatic agent is a combination of dodecyl dimethyl benzyl ammonium chloride and tetramethyl ammonium chloride, with a weight ratio of 1:15.

[0080] The polytrifluoroethylene resin is purchased from Hubei Xinhongli Chemical Co., Ltd., and the item number is LI1019.

[0081] The ester substance is butyl methacrylate, butyrolactone and butylene diglycol glutarate, with a weight ratio of 0.4:0.5:0.1.

[0082] The solvent is: 1.4% dichloroethane, 25% isopropyl alcohol, water (to make up the total weight of the antistatic glue to 100%).

[0083] Secondly, the preparation method of the antistatic glue is: mixing the solvent and ester substances, then adding other ingredients, dissolving and mixing evenly.

[0084] Comparative Example 1

[0085] Basically the same as Example 1, the difference is that the components of the antistatic glue include: tackifying resin 2.5%, olefin copolymer 0.2%, cellulose 2.7%, organic antistatic agent 4.1%, polytrifluoroethylene resin 0.2%, butyl benzyl phthalate (plasticizer) 0.7%, 4,4'-thiobis(6-tert-butyl-m-cresol) (antioxidant) 0.6%, ester substance 1.3%, low methoxyl pectin 0.7%, bisphenol A bisal salicylate 0.6%, defoaming agent 1%, pH adjuster 1%, and the solvent makes up the rest to 100% by weight.

[0086] Comparative Example 2

[0087] Basically the same as Example 1, the difference is that the components of the antistatic glue include: tackifying resin 1.1%, olefin copolymer 2.2%, cellulose 2.1%, organic antistatic agent 4.1%, polytrifluoroethylene resin 0.2%, butyl benzyl phthalate (plasticizer) 0.7%, 4,4'-thiobis(6-tert-butyl-m-cresol) (antioxidant) 0.6%, ester substance 1.3%, low methoxyl pectin 0.7%, bisphenol A bisal salicylate 0.6%, defoaming agent 1%, pH adjuster 1%, and the solvent makes up the rest to 100% by weight.

[0088] Comparative Example 3

[0089] Basically the same as Example 1, the difference is that the melt flow rate of the styrene-ethylene-butadiene-styrene copolymer at 230°C / 5.0 kg is 5.5 g / 10 min, and the elongation at break is 500%, model: Taiwan Formosa 6014.

[0090] Comparative Example 4

[0091] Basically the same as Example 1, the difference is that the organic antistatic agent is tetramethylammonium chloride.

[0092] Comparative Example 5

[0093] Basically the same as Example 1, the difference is that the organic antistatic agent is a combination of dodecyl dimethyl benzyl ammonium chloride and tetraethyl ammonium chloride, with a weight ratio of 1:12.67.

[0094] Comparative Example 6

[0095] The same as Example 1, except that the amount of polytrifluoroethylene resin added in the glue solution is 0.8%.

[0096] Performance test method:

[0097] 1. Viscosity at 25℃: tested according to GB / T 2794.

[0098] 2. 180° peel strength: tested according to national standard GB / T 2792-2014.

[0099] 3. Surface resistivity: the prepared glue solution is coated on the surface of a PET film and a release film is attached, and after being placed at room temperature for 24 hours, the surface resistivity of the film is tested according to ASTM-D4496, and the test voltage is 100V.

[0100] 4. Friction voltage: the test film in 3 is repeatedly wiped with a dust-free cloth, and the surface voltage value is measured after 20 times of wiping.

[0101] Performance test results:

[0102] The test results are shown in Table 1.

[0103] Table 1

[0104]

[0105] It can be seen from the above test results that the antistatic glue solution prepared by the technical scheme of Examples 1-3 has excellent bonding strength and antistatic effect, and still shows a low resistance value under low humidity, and the antistatic retention time is more than 18 months.

[0106] Comparative Example 1-2 shows that when the content of tackifying resin and cellulose is too much, the cohesion in the glue solution is too strong, which is not conducive to the flowability and construction performance of the glue solution, and the glue solution is prone to produce pockmarks after brushing, which not only does not improve the bonding strength of the glue solution, but also leads to the decline of the bonding performance. When the content of olefin polymer is too much, the flowability of the glue solution is good, but it affects the crosslinking strength in the glue solution system and also affects the bonding strength of the glue solution. Similarly, the melt flow rate of the styrene-ethylene-butadiene-styrene copolymer in Comparative Example 3 is too low, which means that the molecular weight is small, and its use will also cause the same result as when the amount of styrene-ethylene-butadiene-styrene copolymer is too much.

[0107] Comparative Example 4-5 shows that a compounded antistatic agent can improve the antistatic property of the sizing solution as a whole, but when an alkyl quaternary ammonium salt having a longer molecular chain is used in excess, it can affect the molecular arrangement in the sizing solution by affecting the intermolecular interaction in the system, thereby affecting the antistatic effect and flowability. The tetraethyl quaternary ammonium salt used in Comparative Example 5 has a lower activity in the system than the tetramethyl quaternary ammonium salt of Example 1, and has a poorer arrangement on the surface of the sizing layer than Example 1.

[0108] In Comparative Example 6, the amount of polytrifluoroethylene resin added is too much, which reduces the adsorption of the sizing layer to the water molecules in the air, thereby causing the antistatic effect of the sizing solution to decrease.

Claims

1. An antistatic adhesive liquid, characterized in that, By total weight, the antistatic adhesive comprises: 0.9-2% tackifying resin, 1.3-1.9% olefin copolymer, 2.3-4.5% cellulose, 3.5-5.2% organic antistatic agent, 0.5-1.0% plasticizer, 0.3-1% antioxidant, 0.7-2% esters, 0.1-0.5% trifluoroethylene resin, 0.2-1.6% pectin, and a solvent balance of 100%. The weight ratio of the tackifying resin, cellulose, and olefin copolymer is (0.9-1.5):(2.3-3.5):(1.3-1.9). The tackifying resin is resorcinol-formaldehyde resin; the cellulose is carboxymethyl cellulose and hydroxypropyl methyl cellulose, with a weight ratio of (0.45-0.82):

1. The olefin copolymer is a styrene-ethylene-butadiene-styrene copolymer and an ethylene-propylene copolymer, with a weight ratio of 1:(5-8). The styrene-ethylene-butadiene-styrene copolymer has a melt flow rate of 18-30 g / 10 min at 230℃ / 5.0 kg and an elongation at break of 400-800%. The organic antistatic agent is a combination of dodecyl dimethyl benzyl ammonium chloride and tetramethyl ammonium chloride, with a weight ratio of 1:(10-15). The esters are butyl methacrylate, butyrolactone, and butyl glutarate in a weight ratio of (0.1-0.4):(0.5-0.9):(0.1-0.4).

2. The application of the antistatic adhesive according to claim 1, characterized in that, The antistatic adhesive is used for antistatic packaging products.

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