CN106753201B - Silicone rubber adhesive for automobile electronic tags and preparation method thereof - Google Patents
Silicone rubber adhesive for automobile electronic tags and preparation method thereof Download PDFInfo
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- 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
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
- C09J183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
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- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
- C08K5/5419—Silicon-containing compounds containing oxygen containing at least one Si—O bond containing at least one Si—C bond
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- C08K5/00—Use of organic ingredients
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- C08K9/00—Use of pretreated ingredients
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
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- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
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Abstract
The invention provides a silicone rubber adhesive for an automobile electronic tag and a preparation method thereof, belonging to the technical field of silicone rubber application. The raw materials of the silicone rubber adhesive comprise a basic rubber material and auxiliary materials, wherein the auxiliary materials comprise the following components in parts by weight based on 100 parts of the basic rubber material: 1-8 parts of a cross-linking agent, 0.01-0.5 part of a catalyst, 0.1-2 parts of a cocatalyst, 0.5-5 parts of a tackifier and 0.1-2 parts of a deep adhesion promoter, wherein the base rubber material comprises 70-88 parts of hydroxyl-terminated polydimethylsiloxane and 12-30 parts of a reinforcing filler in parts by weight. The adhesive is a deacetylated single-component room temperature vulcanized silicone rubber, is used for adhering automobile electronic tags, can meet good performance requirements, is convenient to operate, has a quick adhesion effect, and has the adhesion strength of 3-4 times that of common silicone rubber under the same condition within 1 hour.
Description
Technical Field
The invention relates to a silicon rubber adhesive, in particular to a deacetylated silicon rubber adhesive for an automobile electronic tag and a preparation method thereof, and belongs to the technical field of silicon rubber application.
Background
The silicone rubber has excellent high and low temperature resistance, can be used for a long time at-60 ℃ to 200 ℃, has good ultraviolet resistance, radiation resistance, oxidation and aging resistance, chemical stability and electrical insulation performance, and is widely applied to various fields. The silicon rubber can be divided into single-component and double-component room temperature vulcanized silicon rubber according to the packaging mode, and can be divided into condensation type and addition type according to the vulcanization mechanism. The single-component condensed type silicon rubber can be divided into dealcoholization type, deoximation type, deacetylation type, deacetonation type, deamidation type and the like according to different vulcanized groups; the deacetylated room temperature vulcanized silicone rubber has the advantages of high vulcanization speed, high transparency, low toxicity, environmental friendliness and the like, and has excellent bonding performance on various base materials, particularly glass, ceramics and high temperature rubber base materials. However, the single-component room temperature vulcanized silicone rubber is vulcanized by contacting with moisture in the air, when two substrates to be bonded are not breathable and have large bonding areas, moisture cannot smoothly enter the inside of the bonding layer, the problem that the inside of the bonding layer cannot be vulcanized is caused, and a good bonding effect and bonding strength cannot be achieved.
An electronic identification (ERI) of the motorvehicle is also called an electronic identity card of the motorvehicle, a digital standard information source of the motorvehicle and commonly called an electronic license plate, and information such as a license plate number and the like is stored in a radio frequency tag, so that the identification and monitoring of the motorvehicle can be automatically completed without contact or stop. The automobile electronic identification is established and popularized by the national ministry of public security, and is unified, pushed and managed by the traffic administration of the ministry of public security. At present, the work related to automobile electronic identification is actively promoted by the ministry of public security and the Ministry of industry and communications, the whole new development and national standard development work is expected to be completed in 2014, demonstration application is developed in 2015, and matched application and policy guarantee are perfected in 2016. At present, the base material adopted by the automobile electronic mark is a ceramic substrate (100 mm by 60 mm), and the installation position is the inner side of an automobile windshield. In terms of how to paste the automobile electronic mark, two bonding schemes exist at present: double-sided adhesive tape bonding and silicon rubber bonding. The scheme is that a strong double-sided adhesive tape is adopted for pasting. The scheme has the advantages of simple and convenient operation and strong initial adhesion; the double faced adhesive tape has the defects of poor high temperature resistance, water resistance, ultraviolet resistance and other performances, and the electronic mark can be easily and completely removed under a proper condition (such as heating to 100 ℃). The second scheme adopts silicon rubber to bond the electronic mark, the environmental aging resistance of the electronic mark is obviously superior to that of the first scheme, but the electronic mark has the defects that the single-component room temperature vulcanized silicon rubber is gradually cured by contacting with water vapor in the air, deep vulcanization cannot be carried out in a short time, the silicon rubber in the middle of the ceramic chip is incompletely vulcanized, and the bonding effect of the silicon rubber is greatly reduced. Particularly, in the initial stage of bonding (within 2 hours), only the silicon rubber at the edge of the ceramic substrate is vulcanized, and after the edge of the bonding layer is damaged by tools such as an art designer knife, a wire saw and the like, the electronic mark can be completely removed. Based on the situation, the development and development of the single-component deacetylated room temperature vulcanized silicone rubber which has high strength for assembling the automobile electronic tag, can be quickly and deeply bonded and has a good anti-disassembly effect is necessary.
Disclosure of Invention
The invention mainly aims to provide a silicone rubber adhesive for an automotive electronic tag. The adhesive is a deacetylated single-component room temperature vulcanized silicone rubber, is used for adhering automobile electronic tags, can meet good performance requirements, is convenient to operate, has a quick adhesion effect, and has the adhesion strength of 3-4 times that of common silicone rubber under the same condition within 1 hour.
The invention also aims to provide a preparation method of the silicone rubber adhesive for the automobile electronic tag.
In order to achieve the purpose, the technical method adopted by the invention is as follows:
a silicone rubber adhesive for automobile electronic tags is characterized in that: the raw materials comprise a basic sizing material and auxiliary materials, wherein the auxiliary materials comprise the following components in parts by weight based on 100 parts of the basic sizing material:
1-8 parts of cross-linking agent
0.01 to 0.5 portion of catalyst
0.1-2 parts of cocatalyst
0.5-5 parts of tackifier
0.1-2 parts of deep adhesion promoter
The basic rubber material comprises, by weight, 70-88 parts of hydroxyl-terminated polydimethylsiloxane and 12-30 parts of reinforcing filler.
Wherein the hydroxyl-terminated polydimethylsiloxane, namely 107 glue, is selected from one or a mixture of any more of polysiloxane with the viscosity of 3000-20000 mPa & S. Preferably a 107 glue with a viscosity of 5000 to 10000 mPa.S.
The reinforcing filler is hydrophilic or hydrophobic fumed silica. Wherein hydrophobic fumed silica is preferred, and silazane-treated specific surface area of 100-300 m is most preferred2The hydrophobic fumed silica is/g.
The cross-linking agent is at least one of methyl triacetoxysilane, ethyl triacetoxysilane, propyl triacetoxysilane and vinyl triacetoxysilane.
The catalyst is at least one of dibutyl tin dilaurate, dibutyl tin dioctoate and dibutyl tin diacetate.
The cocatalyst is a compound containing elements such as zinc (Zn), titanium (Ti) or molybdenum (Mo); further, for example, at least one of tetraisopropyl titanate, tetraisobutyl titanate, diisopropyl bis (ethylacetoacetate) titanate, tetra-tert-butyl titanate, zinc acetate, zinc dibutyldithiocarbamate, zinc dibutyldithiophosphate, molybdenum acetylacetonate, and molybdenum dibutyldithiophosphate.
The tackifier is di-tert-butyl diacetyloxysilane.
The deep adhesion promoter is polyalkoxysilane; further, the silane coupling agent is at least one of vinyltrimethoxysilane, vinyltriethoxysilane, methyltrimethoxysilane, tetramethoxysilane, ethyl orthosilicate, gamma-chloropropyltriethoxysilane, gamma-chloropropyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane and gamma-methacryloxypropyltrimethoxysilane.
The preparation method of the silicone rubber adhesive for the automobile electronic tag comprises the following steps: firstly, respectively metering 107 silicone rubber and reinforcing filler into a high-speed stirrer, heating to 160 ℃, and drying for 20-30 minutes; then, moving the mixture into a planetary mixer for vacuumizing and bubble removing for 30-60 minutes; and then adding the cross-linking agent, the tackifier and the deep adhesion promoter according to the measurement, mixing for 30-60 minutes under a vacuum condition, finally adding the catalyst and the cocatalyst according to the measurement, mixing for 30-60 minutes under a vacuum condition, and filtering in a PP pipe isolated from air under the protection of inert gas to obtain the composite material.
Compared with the prior art, the invention has the following advantages:
1. the invention is based on taking hydroxyl-terminated polydimethylsiloxane (107 glue) and reinforcing filler as basic glue stock, simultaneously uses five auxiliary materials of a cross-linking agent, a catalyst, a cocatalyst, a tackifier and a deep-layer adhesion promoter in a compatible way, particularly adopts 107 silicon rubber with the viscosity of 3000-20000 mPa.S and hydrophilic or hydrophobic fumed silica polysiloxane as the reinforcing filler, adds 1-8 parts of the cross-linking agent, 0.01-0.5 part of the catalyst, 0.1-2 parts of the cocatalyst, 0.5-5 parts of the tackifier and 0.1-2 parts of the deep-layer adhesion promoter into 100 parts of the basic glue stock for formulation, obtains the single-component deacetylated room temperature vulcanized silicon rubber which not only has convenient use of the glue stock, but also has the advantages of high vulcanization speed, high transparency, low toxicity and environmental protection, thereby being used as a binder for automobile electronic labels and not only achieving good performance requirements, meanwhile, the adhesive has the effects of convenience in operation, quick adhesion and high adhesive strength, and the adhesive strength in 1 hour is 3-4 times that of common silicon rubber under the same condition.
2. According to the invention, the fumed silica is used as a reinforcing filler, so that the rubber material has excellent thixotropy and higher mechanical property.
3. The invention adopts the compound containing zinc (Zn), titanium (Ti) or molybdenum (Mo) and other elements as the cocatalyst, and has faster vulcanization speed and deep vulcanization performance compared with the common deacetylated silicone rubber.
4. The invention adopts the multi-alkoxy silane as the deep adhesion promoter, has deep vulcanization adhesion performance and better initial adhesion compared with common silicon rubber, and can form good adhesion to the automobile electronic tag in a short time, thereby greatly shortening the installation time of the automobile electronic tag.
5. The preparation method of the silicone rubber is simple, the production equipment is conventional equipment, the production period is short, no three wastes are generated in the production process, and the silicone rubber is environment-friendly.
In a word, the silicon rubber provided by the invention is used as an adhesive of the automobile electronic tag, has better adhesive strength, high and low temperature resistance, ultraviolet aging resistance and disassembly resistance compared with acrylate pressure-sensitive adhesive and common silicon rubber, and provides reliable guarantee for popularization and application of the automobile electronic tag.
Detailed Description
The present invention is further illustrated below with reference to examples, but the embodiments of the present invention are not limited thereto, and any technologies implemented based on the above contents of the present invention are within the scope of the present invention.
The invention relates to a test standard and a method for various indexes of a silicon rubber adhesive, which comprises the following steps:
1. the mechanical properties are characterized by standard tests specified by national standards: wherein, the tensile strength and the elongation at break are determined according to the methods of GB/T528-2009 and Shore A hardness GB/T531-2008.
2. The adhesive property is tested according to the method specified in the national standard GB/T7124-2008.
Example 1
Firstly, 85 parts of 107 silicon rubber with 5000 mPa.S viscosity and silazane-treated specific surface area of 200m2Adding 15 parts of fumed silica per gram into a high-speed stirrer, heating to 160 ℃, and drying for 30 minutes; and then moving the mixture into a planetary stirrer, vacuumizing and discharging bubbles for 45 minutes, adding 3 parts of methyl triacetoxysilane, 2 parts of ethyl triacetoxysilane, 0.5 part of di-tert-butyl diacetyloxysilane and 1 part of vinyl trimethoxy silane, mixing for 30 minutes under a vacuum condition, finally adding 0.02 part of dibutyl tin dilaurate and 0.5 part of tetraisobutyl titanate, mixing for 40 minutes under a vacuum condition, and filtering the mixture in an air-isolated PP (polypropylene) tube under the protection of inert gas to obtain the silicon rubber adhesive for the automobile electronic tags.
Preparing a mechanical and hardness test sample sheet by the obtained adhesive according to GB/T528-; shear specimens were prepared according to GB/T7124-2008, vulcanized at 25 ℃ and 50% relative humidity for 60 minutes, and tested for shear strength at 25 ℃ and 100 ℃, and the test results are shown in Table 1.
Example 2
Firstly, 88 parts of 107 silicone rubber with viscosity of 10000 mPa.S and 200m of silazane-treated specific surface area2Adding 12 parts of fumed silica per gram into a high-speed stirrer, heating to 160 ℃, and drying for 30 minutes; then the mixture is moved into a planetary mixer for vacuumizing and bubble discharging for 40 minutes; then adding 5 parts of ethyl triacetoxysilane, 1 part of di-tert-butyl diacetyloxysilane and 1.5 parts of gamma-glycidyl ether oxypropyltrimethoxysilane, mixing for 30 minutes under a vacuum condition, finally adding 0.03 part of dibutyltin diacetate and 0.8 part of tetraisopropyl titanate, mixing for 60 minutes under a vacuum condition, and filtering in an air-isolated PP (polypropylene) tube under the protection of inert gas to obtain the automobile electronic productThe label is a silicone rubber adhesive.
Preparing a mechanical and hardness test sample sheet by the obtained adhesive according to GB/T528-; shear specimens were prepared according to GB/T7124-2008, vulcanized at 25 ℃ and 50% relative humidity for 60 minutes, and tested for shear strength at 25 ℃ and 100 ℃, and the test results are shown in Table 1.
Example 3
Firstly, 85 parts of 107 silicon rubber with 5000 mPa.S viscosity and silazane-treated specific surface area of 200m2Adding 15 parts of fumed silica per gram into a high-speed stirrer, heating to 160 ℃, and drying for 30 minutes; then the mixture is moved into a planetary stirrer to be vacuumized and bubble-removed for 45 minutes; and then adding 2 parts of vinyl triacetoxysilane, 3 parts of ethyl triacetoxysilane, 1 part of di-tert-butyl diacetyloxysilane and 0.8 part of ethyl orthosilicate, mixing for 30 minutes under a vacuum condition, finally adding 0.02 part of dibutyl tin dilaurate and 0.3 part of molybdenum acetylacetonate, mixing for 60 minutes under a vacuum condition, and filtering in an air-isolated PP (polypropylene) tube under the protection of inert gas to obtain the silicon rubber adhesive for the automobile electronic tag.
Preparing a mechanical and hardness test sample sheet by the obtained adhesive according to GB/T528-; shear specimens were prepared according to GB/T7124-2008, vulcanized at 25 ℃ and 50% relative humidity for 60 minutes, and tested for shear strength at 25 ℃ and 100 ℃, and the test results are shown in Table 1.
Example 4
Firstly, 82 parts of 107 silicon rubber with 8000 mPa.S viscosity and silazane-treated specific surface area of 150m2Adding 18 parts of fumed silica per gram into a high-speed stirrer, heating to 160 ℃, and drying for 30 minutes; then the mixture is moved into a planetary mixer to be vacuumized and bubble-removed for 50 minutes; then adding 3.5 parts of methyl triacetoxysilane, 1.5 parts of propyl triacetoxysilane, 0.5 part of di-tert-butyl diacetyloxysilane, 1 part of vinyl trimethoxy silane and 0.5 part of gamma-chloropropyl trimethoxy silane,mixing for 30 minutes under vacuum condition, finally adding 0.05 part of dibutyltin dioctoate, 0.5 part of diisopropyl bis (ethyl acetoacetate) titanate and 0.3 part of zinc dibutyl dithiophosphate, mixing for 60 minutes under vacuum condition, and filtering in a PP (polypropylene) tube isolated from air under the protection of inert gas to obtain the silicone rubber adhesive for the automobile electronic tag.
Preparing a mechanical and hardness test sample sheet by the obtained adhesive according to GB/T528-; shear specimens were prepared according to GB/T7124-2008, vulcanized at 25 ℃ and 50% relative humidity for 60 minutes, and tested for shear strength at 25 ℃ and 100 ℃, and the test results are shown in Table 1.
Example 5
Firstly, 85 parts of 107 silicon rubber with the viscosity of 10000 mPa.S and 150m of silazane-treated specific surface area2Adding 15 parts of fumed silica per gram into a high-speed stirrer, heating to 160 ℃, and drying for 30 minutes; then the mixture is moved into a planetary mixer to be vacuumized and bubble-removed for 50 minutes; adding 3.5 parts of methyl triacetoxysilane, 1.5 parts of vinyl triacetoxysilane, 1 part of di-tert-butyl diacetyloxysilane, 1 part of tetramethoxysilane and 0.5 part of gamma-methacryloxypropyl trimethoxysilane, mixing for 30 minutes under a vacuum condition, finally adding 0.05 part of dibutyl tin dioctoate, 0.5 part of dibutyl molybdenum dithiophosphate and 0.5 part of dibutyl zinc dithiophosphate, mixing for 60 minutes under a vacuum condition, and filtering in a PP (polypropylene) tube isolated from air under the protection of inert gas to obtain the silicon rubber adhesive for the automobile electronic tag.
Preparing a mechanical and hardness test sample sheet by the obtained adhesive according to GB/T528-; shear specimens were prepared according to GB/T7124-2008, vulcanized at 25 ℃ and 50% relative humidity for 60 minutes, and tested for shear strength at 25 ℃ and 100 ℃, and the test results are shown in Table 1.
Example 6
Firstly, 70 parts of 107 silicone rubber with the viscosity of 3000 mPa.S,Silazane treated specific surface area 300m2Adding 30 parts of fumed silica per gram into a high-speed stirrer, heating to 160 ℃, and drying for 20 minutes; then the mixture is moved into a planetary mixer for vacuumizing and bubble removing for 60 minutes; and then adding 2 parts of methyl triacetoxysilane, 3 parts of ethyl triacetoxysilane, 3 parts of propyl triacetoxysilane, 3 parts of di-tert-butyl diacetyloxysilane, 1 part of vinyl trimethoxysilane and 1 part of methyl trimethoxysilane, mixing for 60 minutes under a vacuum condition, finally adding 0.01 part of dibutyl tin dilaurate, 1 part of tetraisobutyl titanate and 1 part of zinc acetate, mixing for 50 minutes under a vacuum condition, and filtering in a PP (polypropylene) tube isolated from air under the protection of inert gas to obtain the silicon rubber adhesive for the automobile electronic label.
Preparing a mechanical and hardness test sample sheet by the obtained adhesive according to GB/T528-; shear specimens were prepared according to GB/T7124-2008, vulcanized at 25 ℃ and 50% relative humidity for 60 minutes, and tested for shear strength at 25 ℃ and 100 ℃, and the test results are shown in Table 1.
Example 7
80 portions of 107 silicone rubber with 20000 mPas viscosity and 100m of silazane-treated specific surface area2Adding 20 parts of fumed silica per gram into a high-speed stirrer, heating to 160 ℃, and drying for 30 minutes; then the mixture is moved into a planetary mixer to be vacuumized and bubble-removed for 30 minutes; and adding 1 part of ethyl triacetoxysilane, 5 parts of di-tert-butyl diacetyloxysilane and 0.1 part of methyl trimethoxy silane, mixing for 40 minutes under a vacuum condition, finally adding 0.5 part of dibutyl tin dilaurate and 0.1 part of tetraisopropyl titanate, mixing for 30 minutes under a vacuum condition, and filtering in a PP (polypropylene) tube isolated from air under the protection of inert gas to obtain the silicon rubber adhesive for the automobile electronic tag.
Preparing a mechanical and hardness test sample sheet by the obtained adhesive according to GB/T528-; shear specimens were prepared according to GB/T7124-2008, vulcanized at 25 ℃ and 50% relative humidity for 60 minutes, and tested for shear strength at 25 ℃ and 100 ℃, and the test results are shown in Table 1.
Example 8
75 portions of 107 silicon rubber with the viscosity of 15000mPa & S and 250m of silazane-treated specific surface area2Adding 25 parts of fumed silica per gram into a high-speed stirrer, heating to 160 ℃, and drying for 20 minutes; then the mixture is moved into a planetary mixer to be vacuumized and bubble-removed for 50 minutes; and then adding 1 part of ethyl triacetoxysilane, 2 parts of propyl triacetoxysilane, 2 parts of di-tert-butyl diacetyloxysilane and 0.5 part of gamma-methacryloxypropyl trimethoxy silane, mixing for 35 minutes under a vacuum condition, finally adding 0.2 part of dibutyl tin dilaurate, 0.1 part of dibutyl tin diacetate, 0.5 part of tetraisopropyl titanate and 1 part of dibutyl molybdenum dithiophosphate, mixing for 45 minutes under a vacuum condition, and filtering in a PP (polypropylene) tube isolated from air under the protection of inert gas to obtain the silicon rubber adhesive for the automobile electronic tag.
Preparing a mechanical and hardness test sample sheet by the obtained adhesive according to GB/T528-; shear specimens were prepared according to GB/T7124-2008, vulcanized at 25 ℃ and 50% relative humidity for 60 minutes, and tested for shear strength at 25 ℃ and 100 ℃, and the test results are shown in Table 1.
Comparative example 1 (without Co-catalyst, deep adhesion promoter)
Firstly, 85 parts of 107 silicon rubber with 5000 mPa.S viscosity and silazane-treated specific surface area of 200m2Adding 15 parts of fumed silica per gram into a high-speed stirrer, heating to 160 ℃, and drying for 30 minutes; then the mixture is moved into a planetary stirrer to be vacuumized and bubble-removed for 45 minutes; and adding 5 parts of methyl triacetoxysilane and 1 part of di-tert-butyl diacetyloxysilane, mixing for 30 minutes under a vacuum condition, finally adding 0.02 part of dibutyl tin dilaurate, mixing for 60 minutes under a vacuum condition, and filtering in a PP (polypropylene) tube isolated from air under the protection of inert gas to obtain the silicon rubber adhesive.
Preparing a mechanical and hardness test sample sheet by the obtained adhesive according to GB/T528-; shear specimens were prepared according to GB/T7124-2008, vulcanized at 25 ℃ and 50% relative humidity for 60 minutes, and tested for shear strength at 25 ℃ and 100 ℃, and the test results are shown in Table 1.
Comparative example 2 (without addition of Co-catalyst, deep adhesion promoter)
Firstly, 82 parts of 107 silicon rubber with 8000 mPa.S viscosity and silazane-treated specific surface area of 150m2Adding 18 parts of fumed silica per gram into a high-speed stirrer, heating to 160 ℃, and drying for 30 minutes; then the mixture is moved into a planetary stirrer to be vacuumized and bubble-removed for 45 minutes; and adding 3 parts of methyl triacetoxysilane, 2 parts of ethyl triacetoxysilane and 1 part of di-tert-butyl diacetyloxysilane, mixing for 30 minutes under a vacuum condition, finally adding 0.02 part of dibutyl tin dilaurate, mixing for 60 minutes under a vacuum condition, and filtering in a PP (polypropylene) tube isolated from air under the protection of inert gas to obtain the silicone rubber adhesive.
Preparing a mechanical and hardness test sample sheet by the obtained adhesive according to GB/T528-; shear specimens were prepared according to GB/T7124-2008, vulcanized at 25 ℃ and 50% relative humidity for 60 minutes, and tested for shear strength at 25 ℃ and 100 ℃, and the test results are shown in Table 1.
Comparative example 3 (acrylate pressure-sensitive adhesive)
A shear sample is prepared from VHB-4595 type double-sided adhesive tape of 3M company according to GB/T7124-2008, the shear sample is respectively bonded for 30 and 60 minutes under the conditions of 25 ℃ and 50% of relative humidity, and the shear strength of the shear sample at the temperature of 25 ℃ and 100 ℃ is tested, and the result is shown in Table 1.
As can be seen from table 1:
1. although the test results of the examples 1 to 8 are not much different from those of the comparative examples 1 and 2 in mechanical properties, the shear strength (ceramic-glass) of 30min and 60min is 3-4 times that of the examples 1 to 8, which shows that the silicon rubber adhesive for the automobile electronic tag, developed by the invention, can greatly shorten the installation time of the automobile electronic tag, shorten the original installation time of several hours to 30-60 minutes, and greatly improve the installation efficiency of the electronic tag; and the initial adhesion of the silicone rubber within 30-60 min is greatly improved, so that the automobile electronic tag can be prevented from being manually detached and replaced at the initial installation stage.
2. Although comparative example 3 has a certain initial adhesive strength at the initial stage of bonding and the shear strength thereof is slightly changed with the extension of the bonding time, when the temperature is raised to 100 ℃, the bonding strength of comparative example 3 is rapidly reduced, which indicates that the acrylic pressure-sensitive adhesive bonded automotive electronic tag can be easily and completely removed by using a proper heating tool and replaced to another vehicle or an electronic tag which is not matched with the original vehicle is mounted on the vehicle, which is contrary to the principle of 'one vehicle and one card' when the automotive electronic tag is set up, and is extremely disadvantageous to the future management of the automotive electronic tag.
The above-described embodiments are merely intended to better illustrate the present invention and should not be construed as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. based on the above-described embodiments of the present invention are intended to fall within the scope of the present invention.
Claims (6)
1. A silicone rubber adhesive for automobile electronic tags is characterized in that: the raw materials comprise a basic sizing material and auxiliary materials, wherein the auxiliary materials comprise the following components in parts by weight based on 100 parts of the basic sizing material:
1-8 parts of cross-linking agent
0.01 to 0.5 portion of catalyst
0.1-2 parts of cocatalyst
0.5-5 parts of tackifier
0.1-2 parts of deep adhesion promoter
The basic rubber material comprises 70-88 parts by weight of hydroxyl-terminated polydimethylsiloxane and 12-30 parts by weight of reinforcing filler;
the cocatalyst is a compound containing zinc, titanium or molybdenum elements, and comprises: at least one of tetraisopropyl titanate, tetraisobutyl titanate, diisopropyl bis (ethyl acetoacetate) titanate, tetra-tert-butyl titanate, zinc acetate, zinc dibutyl dithiocarbamate, zinc dibutyl dithiophosphate, molybdenum acetylacetonate, and molybdenum dibutyl dithiophosphate;
the cross-linking agent is at least one of methyl triacetoxysilane, ethyl triacetoxysilane, propyl triacetoxysilane and vinyl triacetoxysilane;
the deep adhesion promoter is a polyalkoxysilane, and comprises: at least one of vinyltrimethoxysilane, vinyltriethoxysilane, methyltrimethoxysilane, tetramethoxysilane, ethyl orthosilicate, gamma-chloropropyltriethoxysilane, gamma-chloropropyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane and gamma-methacryloxypropyltrimethoxysilane;
the preparation method of the silicone rubber adhesive for the automobile electronic tag comprises the following steps: firstly, respectively metering hydroxyl-terminated polydimethylsiloxane and reinforcing filler into a high-speed stirrer, heating to 160 ℃, and drying for 20-30 minutes; then, moving the mixture into a planetary mixer for vacuumizing and bubble removing for 30-60 minutes; and then adding the cross-linking agent, the tackifier and the deep adhesion promoter according to the measurement, mixing for 30-60 minutes under a vacuum condition, finally adding the catalyst and the cocatalyst according to the measurement, mixing for 30-60 minutes under a vacuum condition, and filtering in a PP pipe isolated from air under the protection of inert gas to obtain the composite material.
2. The silicone rubber adhesive for automotive electronic tags according to claim 1, characterized in that: the hydroxyl-terminated polydimethylsiloxane is selected from one or a mixture of any more of polysiloxane with the viscosity of 3000-20000 mPa & S.
3. The silicone rubber adhesive for automotive electronic tags according to claim 1, characterized in that: the reinforcing filler is hydrophilic or hydrophobic fumed silica.
4. The silicone rubber adhesive for automotive electronic tags according to claim 1 or 3, characterized in that: the reinforcing filler is silazane-treated specific surface area of 100-300 m2The hydrophobic fumed silica is/g.
5. The silicone rubber adhesive for automotive electronic tags according to claim 1, characterized in that: the catalyst is at least one of dibutyl tin dilaurate, dibutyl tin dioctoate and dibutyl tin diacetate.
6. The silicone rubber adhesive for automotive electronic tags according to claim 1, characterized in that: the tackifier is di-tert-butyl diacetyloxysilane.
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| JP2019533747A (en) * | 2016-10-31 | 2019-11-21 | ワッカー ケミー アクチエンゲゼルシャフトＷａｃｋｅｒ Ｃｈｅｍｉｅ ＡＧ | Single component room temperature curable compositions based on organosilicon compounds and titanium curing catalysts |
| CN107286668A (en) * | 2017-08-03 | 2017-10-24 | 泉州市知产茂业工业设计有限公司 | Acid silicon rubber of a kind of double component room temperature vulcanization and preparation method thereof |
| CN108395868A (en) * | 2018-01-31 | 2018-08-14 | 苏州达同新材料有限公司 | The special two-component casting glue of photovoltaic junction box |
| CN110511719B (en) * | 2019-08-02 | 2021-08-03 | 北京航空材料研究院有限公司 | Single-component high-strength deacidified room temperature vulcanized organosilicon sealant and preparation method thereof |
| CN112778965B (en) * | 2019-11-11 | 2022-12-09 | 中蓝晨光化工研究设计院有限公司 | Alcohol-type silicon rubber adhesive and preparation method thereof |
| CN111394054A (en) * | 2020-03-24 | 2020-07-10 | 新安天玉有机硅有限公司 | Silicone rubber for self-adhesive tape and preparation method thereof |
| CN111334245A (en) * | 2020-04-16 | 2020-06-26 | 中科新镧系(厦门)科技有限公司 | Dealcoholized excellent-yellowing-resistance organosilicon sealant and preparation method thereof |
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| JP4054942B2 (en) * | 2000-09-21 | 2008-03-05 | 信越化学工業株式会社 | Silicone adhesive composition |
| CN102277127B (en) * | 2011-08-05 | 2014-04-16 | 山东宝龙达实业集团有限公司 | Acidic silicone sealant |
| CN103319900A (en) * | 2013-06-07 | 2013-09-25 | 浙江汇杰有机硅有限公司 | High-transparency room-temperature-cured silicone composition and preparation method thereof |
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