CN110527012A - A kind of modified acrylate emulsion pressure sensitive adhesive preparation method and application - Google Patents
A kind of modified acrylate emulsion pressure sensitive adhesive preparation method and application Download PDFInfo
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- CN110527012A CN110527012A CN201910492334.8A CN201910492334A CN110527012A CN 110527012 A CN110527012 A CN 110527012A CN 201910492334 A CN201910492334 A CN 201910492334A CN 110527012 A CN110527012 A CN 110527012A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
- C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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Abstract
The invention discloses a kind of modified acrylate emulsion pressure sensitive adhesive preparation method and application, include following components according to mass fraction: 75 parts of butyl acrylate, 25 parts of vinylacetate, 2 parts of acrylic acid, 3 parts of acetoacetoxyethyl methacrylate, 0.8 part of nonylphenol polyoxyethylene ether sulfate, 0.9 part of ammonium persulfate, 0.15 part of sodium bicarbonate, 100 parts of deionized water.Emulsion polymerization systems are introduced with MOLECULE DESIGN method acetoacetoxyethyl methacrylate (AAEM), cross-linking reaction system is carried out using acetoacetoxy groups and outside cross-linking agent ethylenediamine, is prepared for the excellent external crosslinking emulsion pressure-sensitive of temperature pressure sensitive adhesive property.
Description
Technical field
The present invention relates to a kind of modified acrylate emulsion pressure sensitive adhesive preparation method and application, specially methacrylic acid second
The synthetic method of acyl acetoxyethyl modified acrylate emulsion.
Background technique
Emulsion-type pressure-sensitive has that synthesis technology is simple, pollution-free, VOC content is low, many advantages such as at low cost, therefore its
Market prospects are more and more wide.But common emulsion pressure-sensitive there are still holding power/peel strength balanced capacities weak, water resistance and
The disadvantages of durability is poor, therefore be difficult to meet the requirement in high-end pressure sensitive adhesive field.In order to improve its pressure sensitive adhesive characteristic, can be used
The methods of solvent misture modification, reactive emulsifier modification, nanometer particle-modified prepare high performance pressure sensitive latex solution.Change many
It is relatively more using the modified research report of solvent misture in Journal of Sex Research, but there are solvent mistures to lead to the variation of lotion character, holds
The problems such as viscous force declines.In addition, cross-linking modified is also to improve one of emulsion pressure-sensitive performance most efficient method.By in lotion
The function monomer that crosslinkable groups are introduced in preparation process crosslinks reaction in film forming and generates tridimensional network.Currently,
Be usually used in the cross-linking modified system of emulsion pressure-sensitive has epoxy resin, ketone carbonyl class, acrylic amide etc. respectively.
In recent years, acetoacetyl is as a kind of novel reactable active group, can with metal, amine, isocyanates,
Active olefin and aldehyde react.Monomer containing acetoacetyl is mainly acetoacetoxyethyl methacrylate
(AAEM), the cross-linking monomer is relatively less toxic, has received widespread attention in terms of cross-linking modified lotion.Zhang Yubo etc. is with AAEM
Modified function monomer, aziridine are that curing agent is prepared for bi-component acrylic ester water paint, and applies it to paint field
In；Lei Liang etc. utilizes AAEM modification acrylate, and using the hexamethylene diamine solution that mass fraction is 10% as curing agent synthesized polymer
Object lotion has inquired into influence of the different AAEM dosages to glue film performance.Wang little Rong etc. is using AAEM as function monomer, carbon acid dihydrazide
Room temperature self-crosslinking acrylic ester emulsion has been synthesized for crosslinking agent, and has prepared water varnish.But by AAEM function monomer modified third
Olefin(e) acid ester lotion and being applied in terms of pressure sensitive adhesive is rarely reported.
Summary of the invention
The present invention introduces emulsion polymer using MOLECULE DESIGN method acetoacetoxyethyl methacrylate (AAEM)
System carries out cross-linking reaction system using acetoacetoxy groups and outside cross-linking agent ethylenediamine, is prepared for temperature pressure sensitive adhesive property
Excellent external crosslinking emulsion pressure-sensitive.
The object of the invention is specifically implemented with the following technical solutions:
A kind of modified acrylate emulsion, includes following components according to mass fraction: 75 parts of butyl acrylate (BA), acetic acid
25 parts of vinyl acetate (VAc), 2 parts of acrylic acid (AA), 3 parts of acetoacetoxyethyl methacrylate (AAEM), polyoxyethylene nonyl phenyl
0.8 part of ethylene ether sodium sulfate (NPES), 0.9 part of ammonium persulfate (APS), 0.15 part of sodium bicarbonate, 100 parts of deionized water.
The emulsifier is selected from nonylphenol polyoxyethylene ether sulfate (NPES), and the initiator is selected from ammonium persulfate
(APS)。
In another aspect of this invention, a kind of synthetic method of modified acrylate emulsion, comprising the following steps:
1) emulsifier, initiator, deionized water are stirred by monomer BA, VAc, AA, AAEM is stirring evenly and then adding into
30min obtains pre-emulsion, spare；
2) it by the pre-emulsion of mass fraction 20%, initiator, sodium bicarbonate and deionized water, after being stirred at room temperature uniformly, puts
Enter in 80 DEG C of water-bath and polymerize 15min；
3) when blue phase occurs in system, remaining pre-emulsion is slowly added dropwise by dropping funel and guarantees to drip in 2.5h；
4) after being warming up to 85 DEG C of reaction 1h, 45 DEG C are cooled the temperature to, adjusts pH to 8, ethylenediamine is added, stirs 10min, mistake
Filter to obtain lotion.
Further, the emulsifier is selected from nonylphenol polyoxyethylene ether sulfate (NPES), the initiator choosing
From ammonium persulfate (APS).
Further, the dosage mass ratio of initiator is 3:1 in step (1) neutralization procedure (2).
Further, adjust in step (4) pH use mass fraction for 30% ammonium hydroxide.
In another aspect of this invention, a kind of crosslinked emulsions are being provided, above-mentioned synthetic emulsion is being added and metering system
The crosslinking agent ethylenediamine of sour acetoacetoxyethyl equivalent, crosslinked emulsions after mixing evenly.
The invention has the benefit that
For the present invention using butyl acrylate as soft monomer, vinylacetate is hard monomer, using pre-emulsification-half-continuous process,
It is pressure-sensitive using acetoacetylethylethyl methacrylate/Crosslinkable Acrylic Polymer Emulsion is prepared in ethylenediamine cross-linking system
Glue.Studies have shown that with the increase of AAEM dosage, gel fraction is gradually risen.When soft or hard monomer weight ratio be 85/15, acrylic acid
Be 2%, initiator amount 0.9%, emulsifier 0.8%, cross-linking monomer AAEM dosage be 3% when, it is prepared pressure-sensitive
Glue has good adhesive property and high temperature resistance.
Detailed description of the invention
Fig. 1 is AAEM emulsion gel schematic diagram of the present invention；
Fig. 2 is the pressure-sensitive adhesive emulsion grain size distribution of different AAEM dosages；
Fig. 3 is influence of the AAEM dosage of the present invention to cured glue layer gel content；
Fig. 4 is influence of the AAEM dosage of the present invention to latex film water absorption rate；
Fig. 5 is the cross-linking reaction schematic diagram of AAEM and ethylenediamine of the present invention；
Fig. 6 is the infrared spectroscopy of EDA, AAEM, CPA, PCPA of the present invention；Wherein a is EDA；B is AAEM；C is CPA；D is
PCPA。
Specific embodiment
Below in conjunction with specific embodiment of the present invention, technical solution of the present invention is clearly and completely described, is shown
So, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the reality in the present invention
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the scope of protection of the invention.
Embodiment 1
Liquid polymerize each component and dosage is as shown in table 1, using pre-emulsification semi-continuous polymerization technique, by emulsifier, initiator,
Deionized water is stirring evenly and then adding into monomer BA, VAc, AA, AAEM, is stirred with mechanical stirring as in a certain amount of addition there-necked flask
30min obtains pre-emulsion, spare.
Pre-emulsion, remaining initiator, sodium bicarbonate and the deionized water of mass fraction about 20%, room are added in four-hole bottle
Temperature after mixing evenly, loads onto condenser pipe, thermometer is put into 80 DEG C of water-bath and polymerize 15min.When blue phase occurs in system, pass through
Dropping funel is slowly added dropwise remaining pre-emulsion and guarantees to drip in 2.5h.After rising to 85 DEG C the reaction was continued 1h, then by temperature
45 DEG C are down to, then the ammonium hydroxide tune pH to 8 for being 30% with mass fraction is added a certain amount of ethylenediamine (EDA), 10min is stirred,
With the filter-cloth filtering of 300 mesh, discharging obtains pressure-sensitive adhesive emulsion (CPA).
1 emulsion polymerization component of table and dosage
The crosslinking agent ethylenediamine with acetoacetoxyethyl methacrylate equivalent is added in above-mentioned synthetic emulsion, is stirred
Crosslinked emulsions (PCPA) after mixing uniformly.By determining thick tape fixed certain thickness out on PET film, with stainless steel stick
Lotion is coated, is put into 105 DEG C of baking ovens and toasts 3min, control the adhesive tape that last bondline thickness is about 20 μm.
Embodiment 2
Liquid polymerize each component and dosage is as shown in table 2, using pre-emulsification semi-continuous polymerization technique, by emulsifier, initiator,
Deionized water is stirring evenly and then adding into monomer BA, VAc, AA, AAEM, is stirred with mechanical stirring as in a certain amount of addition there-necked flask
30min obtains pre-emulsion, spare.
Pre-emulsion, remaining initiator, sodium bicarbonate and the deionized water of mass fraction about 20%, room are added in four-hole bottle
Temperature after mixing evenly, loads onto condenser pipe, thermometer is put into 80 DEG C of water-bath and polymerize 15min.When blue phase occurs in system, pass through
Dropping funel is slowly added dropwise remaining pre-emulsion and guarantees to drip in 2.5h.After rising to 85 DEG C the reaction was continued 1h, then by temperature
45 DEG C are down to, then the ammonium hydroxide tune pH to 8 for being 30% with mass fraction is added a certain amount of ethylenediamine (EDA), 10min is stirred,
With the filter-cloth filtering of 300 mesh, discharging obtains pressure-sensitive adhesive emulsion (CPA).
2 emulsion polymerization component of table and dosage
The crosslinking agent ethylenediamine with acetoacetoxyethyl methacrylate equivalent is added in above-mentioned synthetic emulsion, is stirred
Crosslinked emulsions (PCPA) after mixing uniformly.By determining thick tape fixed certain thickness out on PET film, with stainless steel stick
Lotion is coated, is put into 105 DEG C of baking ovens and toasts 3min, control the adhesive tape that last bondline thickness is about 20 μm.
Embodiment 3
Liquid polymerize each component and dosage is as shown in table 3, using pre-emulsification semi-continuous polymerization technique, by emulsifier, initiator,
Deionized water is stirring evenly and then adding into monomer BA, VAc, AA, AAEM, is stirred with mechanical stirring as in a certain amount of addition there-necked flask
30min obtains pre-emulsion, spare.
Pre-emulsion, remaining initiator, sodium bicarbonate and the deionized water of mass fraction about 20%, room are added in four-hole bottle
Temperature after mixing evenly, loads onto condenser pipe, thermometer is put into 80 DEG C of water-bath and polymerize 15min.When blue phase occurs in system, pass through
Dropping funel is slowly added dropwise remaining pre-emulsion and guarantees to drip in 2.5h.After rising to 85 DEG C the reaction was continued 1h, then by temperature
45 DEG C are down to, then the ammonium hydroxide tune pH to 8 for being 30% with mass fraction is added a certain amount of ethylenediamine (EDA), 10min is stirred,
With the filter-cloth filtering of 300 mesh, discharging obtains pressure-sensitive adhesive emulsion (CPA).
3 emulsion polymerization component of table and dosage
The crosslinking agent ethylenediamine with acetoacetoxyethyl methacrylate equivalent is added in above-mentioned synthetic emulsion, is stirred
Crosslinked emulsions (PCPA) after mixing uniformly.By determining thick tape fixed certain thickness out on PET film, with stainless steel stick
Lotion is coated, is put into 105 DEG C of baking ovens and toasts 3min, control the adhesive tape that last bondline thickness is about 20 μm.
The solid content and stability of 4 lotion of embodiment
Polyacrylate (CPA) lotion and crosslinking of different AAEM contents have been prepared with pre-emulsification semi-continuous polymerization technique
Type polyacrylate (PCPA) lotion.The fundamental property solid content and stability for then having investigated lotion, are measured by weight method
Its mass fraction of solids is 47. 8%~50%, is coincide in allowable range of error with theoretical value 50%.CPA lotion standing is put
Without precipitating and floccule after setting 6 months, character is constant, to prove it with good stability.And PCPA lotion places 48h
After there is obvious floccule to occur, storage stability is poor.On the one hand, it may be possible in ammonium hydroxide is added with after, ammonium hydroxide and acetoacetyl
Oxygroup generates enamine, is added after ethylenediamine and enamine forms hydrogen bond, lotion is caused to be physical crosslinking.Due to AAEM and ethylenediamine
Reactivity it is big, with the volatilization of ammonium hydroxide, further with hexamethylene diamine chemical crosslink reaction occurs for enamine, makes emulsion de-emulsifies
Even whole gels, are shown in Fig. 1；Another important reason is the electrolyte that ethylenediamine is strong basicity, is also easy to lose emulsifier
Protective effect causes emulsion system unstable, to gel occur.Therefore, in order to guarantee emulsion intercalation method, AAEM crosslinking
The pressure-sensitive adhesive emulsion of system is not suitable for being made into self-crosslinking reaction lotion, can only be made into the external crosslinking type acrylic acid ester emulsion of bi-component
System.
The analysis of 5 emulsion particle diameter of embodiment
In order to further study the property of lotion, dynamic light scattering survey has been carried out to the emulsion particle diameter of different AAEM contents
Examination, result are as shown in Figure 2.As seen from the figure, after introducing AAEM in copolymerization system, the average grain diameter of lotion becomes larger.This be by
Do not have strong hydrophily in AAEM, after water-soluble initiator A PS enters reactor, in chain carrier fixing situation
Under, increase into the number of monomers in emulsion particle, thus the emulsion particle to be formed is made to become larger.
Influence of the embodiment 6AAEM content to glue film gel fraction and glue film water absorption rate
In order to investigate whether latex film crosslinks, the gel fraction of different AAEM content latex films is tested, result is such as
Shown in Fig. 3.From figure it can be found that with AAEM dosage increase, increased trend is presented in the gel fraction of latex film.When AAEM is
When 2wt%, gel fraction has reached 85%, further increases AAEM dosage, and gel fraction varies less.This is because in AAEM
Acetoacetoxy groups react with the amine in ethylenediamine, form cross-linked network, and with the increase of AAEM dosage, crosslink density increases
Greatly, the average molecular weight between crosslinking points is smaller, and polymer architecture is close, therefore gel fraction increases, but when AAEM dosage to one
After determining degree, cross-linked network has leveled off to saturation, can not continue to expand, therefore, continue growing AAEM dosage, gel fraction is almost
Variation is little.
In order to further study the performance of glue film, the water absorption rate of different AAEM content lotions is tested, result
See Fig. 4.From figure it can be found that with AAEM dosage increase, raised trend after first reducing is presented in the water absorption rate of latex film, out
Existing minimum.When AAEM dosage is less than 1wt%, latex film water absorption rate downward trend is more obvious, this is because as AAEM is used
The increase of amount, the number of crosslinking points increases in system, and crosslink density increases, and polymer molecule cross-linked network structure is even closer,
Water resistance significantly improves, and water absorption rate decreases；When AAEM dosage continues growing, the water absorption rate downward trend of latex film slows down
Slowly.This is because crosslinking points number is more difficult in system, and crosslink density is also without too big after AAEM dosage reaches to a certain degree
Variation.
The cross-linking reaction of embodiment 7 acetoacetoxy groups and diamines
The reaction of acetoacetoxy groups and diamines is a dehydration, mechanism such as Fig. 5.For the ease of studying acetoacetyl
The reaction of oxygroup and diamines first synthesizes the lotion containing AAEM and carries out infrared analysis.
Curve a and b in Fig. 6 are the infrared spectrogram of EDA and AAEM respectively, and curve c and d are the cream containing AAEM respectively
The infrared spectrogram of liquid reaction front and back.It can be seen that 3342cm from Fig. 6 curve a-1And 1567cm-1It is that the amido of EDA is stretched respectively
Contracting vibration absorption peak and deformation vibration the absworption peak；2930cm-1And 2855cm-1It is the methylene absorption peak of EDA.From Fig. 6 curve b
As can be seen that in 2961cm-1、2930cm-1Locating absorption peak is the methyl of AAEM and the stretching vibration absworption peak of methylene；
1363cm-1Place is the deformation vibration the absworption peak of methyl；The ester carbonyl group base of AAEM and the stretching vibration characteristic absorption peak point of ketone carbonyl
Not in 1748 cm-1And 1719cm-1；1630cm-1It is the characteristic absorption peak of unsaturated double-bond.
From lotion reaction before infrared spectroscopy (Fig. 6 curve c) it is found that AAEM in 1630cm-1The unsaturated double-bond at place absorbs
Peak disappears, and surface A AEM has been aggregated in macromolecular chain；Since the absorption peak of ketone carbonyl and ester carbonyl group is overlapped, ketone carbonyl
Base is in 1719cm-1Absorption it is unobvious, show a wide absorption peak；It can see from Fig. 6 curve d, by crosslinking, carbonyl
Peak becomes sharp absorption peak by a broad peak, and peak intensity weakens significantly, while in 1650cm-1And 1601cm-1Place occur two it is new
Absorption peak is respectively the unsaturated double-bond of enamine bonds (- CH=C-NH-) and the characteristic absorption peak of imine linkage, shows acetoacetyl oxygen
Base and ethylenediamine have occurred and that cross-linking reaction, generate enamine bond structure.
Influence of the embodiment 8AAEM dosage to glue film pressure sensitive adhesive characteristic
It is cross-linking monomer and soft or hard monomer, function list by AAEM to improve the high-temperature behavior of acrylate pressure sensitive adhesive sample
Body copolymerization, is then adjusted to 8 for lotion pH, and the subsequent ethylenediamine (EDA) being added with AAEM equivalent obtains pressure-sensitive after coating is dry
Adhesive tape, and AAEM dosage has been investigated to pressure sensitive adhesive characteristic such as initial bonding strength, 180o peel strength, holding power, high temperature holding power, highest
The influence of heatproof, the results are shown in Table 4.
From table 4, it can be seen that constantly increasing to 4% from 0% with AAEM dosage, holding power, the high temperature of pressure sensitive adhesive are held
Viscous force dramatically increases.It is possible thereby to which proving that the cross-linking reaction of AAEM and EDA plays really improves pressure sensitive adhesive holding power, height
The effect of warm holding power.Because crosslinking makes polymer become netted by line style, the glass transition temperature of polymer is improved, is enhanced
The cohesive force of polymer, limits the movement of strand, reduces the mobility of polymer, hinders pressure sensitive adhesive to adherend table
The wetting in face, therefore the introducing of cross-linking system can reduce initial bonding strength and 180 ° of peel strengths while improving holding power.
Influence of 4 AAEM of table to pressure sensitive adhesive mechanical property
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understand without departing from the principles and spirit of the present invention can to these examples carry out it is a variety of variation, modification, replacement and
Modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of modified acrylate emulsion, which is characterized in that according to mass fraction include following components: butyl acrylate 75
Part, 25 parts of vinylacetate, 2 parts of acrylic acid, 3 parts of acetoacetoxyethyl methacrylate, nonylphenol polyoxyethylene ether sulphur
0.8 part of sour sodium, 0.9 part of ammonium persulfate, 0.15 part of sodium bicarbonate, 100 parts of deionized water.
2. a kind of modified acrylate emulsion according to claim 1, which is characterized in that the emulsifier is selected from nonyl
Phenol polyethenoxy ether sodium sulfate, the initiator are selected from ammonium persulfate.
3. a kind of synthetic method of modified acrylate emulsion, which comprises the following steps:
1) emulsifier, initiator, deionized water are stirred 30min, obtained by monomer BA, VAc, AA, AAEM is stirring evenly and then adding into
It is spare to pre-emulsion；
2) by the pre-emulsion of mass fraction 20%, initiator, sodium bicarbonate and deionized water, after being stirred at room temperature uniformly, 80 are put into
DEG C water-bath in polymerize 15min；
3) when blue phase occurs in system, remaining pre-emulsion is slowly added dropwise by dropping funel and guarantees to drip in 2.5h；
4) after being warming up to 85 DEG C of reaction 1h, 45 DEG C are cooled the temperature to, adjusts pH to 8, ethylenediamine is added, 10min is stirred, filters
Lotion.
4. a kind of synthetic method of modified acrylate emulsion according to claim 3, which is characterized in that in step (1)
Dosage mass ratio with initiator in step (2) is 3:1.
5. a kind of synthetic method of modified acrylate emulsion according to claim 3, which is characterized in that in step (4)
Adjust pH use mass fraction for 30% ammonium hydroxide.
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| CN112210032A (en) * | 2020-09-09 | 2021-01-12 | 浙江万宝龙胶粘制品有限公司 | Bi-component water-dispersible copolymer emulsion, preparation method and application thereof in aspect of self-adhesive label surface material |
| CN115340828A (en) * | 2022-07-04 | 2022-11-15 | 江西昊泽光学膜科技有限公司 | Lithium ion battery termination adhesive tape with corrosion resistance |
| CN115340828B (en) * | 2022-07-04 | 2023-11-24 | 江西昊泽光学膜科技有限公司 | Lithium ion battery termination adhesive tape with corrosion resistance |
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Application publication date: 20191203 |