CN113861896A - Initial-stage low-adhesiveness glue - Google Patents
Initial-stage low-adhesiveness glue Download PDFInfo
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- CN113861896A CN113861896A CN202111075907.0A CN202111075907A CN113861896A CN 113861896 A CN113861896 A CN 113861896A CN 202111075907 A CN202111075907 A CN 202111075907A CN 113861896 A CN113861896 A CN 113861896A
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- glue
- polyorganosiloxane
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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
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/062—Copolymers with monomers not covered by C09J133/06
- C09J133/066—Copolymers with monomers not covered by C09J133/06 containing -OH groups
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- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses initial-stage low-adhesiveness glue, which relates to the technical field of glue and comprises the following components in parts by weight: 100 parts of polymer with glass transition temperature Tg of 0 ℃, 0.05-20 parts of polymer of copolymer of monomer with polyorganosiloxane framework and acrylic monomer, and 0.05-20 parts of crosslinking agent. After being attached to an adherend, the adhesive strength can be temporarily reduced within a room temperature range, and a good re-attaching performance can be exhibited during this period, thereby contributing to reduction in yield and improvement in quality of products including the reinforcing film; furthermore, the adhesion properties can be greatly improved by aging.
Description
Technical Field
The invention relates to the technical field of glue, in particular to initial-stage low-adhesiveness glue.
Background
The adhesive film is firmly bonded to the adherend, and is used for the purpose of bonding the adherend to another object, fixing an article to the adherend, reinforcing the adherend, and the like. To achieve such an object, a glue exhibiting high adhesion is used from the beginning of the attachment. Further, there have been proposed glues which exhibit a low adhesive force at the initial stage of adhesion to an adherend and which can then significantly increase the adhesive force; the glue having such characteristics can suppress a decrease in yield due to a bonding error or a sticking failure before the adhesive strength is increased, and can exhibit re-bonding performance. Furthermore, after the adhesive force is increased, the adhesive can be used for the purpose of exhibiting the originally strong adhesive property of the glue. With respect to glues having both an initial low tack and a strong tack in use, the discussion is made primarily in terms of the nature and composition of the adhesive, but there is no glue that meets the performance requirements.
Disclosure of Invention
The present invention has been made in view of the above-mentioned problems and disadvantages of the prior art, and an object of the present invention is to provide a low-tack adhesive at an initial stage, which is designed to be reasonable, and which can temporarily suppress its low adhesive force within a room temperature range (for example, 20 to 30 ℃) after being applied to an adherend, and which can contribute to suppression of yield and improvement in quality of products including the reinforcing film, since good re-application performance can be exhibited during the period; moreover, the adhesion properties can be greatly improved by aging (heating, passage of time, combination, etc.).
In order to achieve the purpose, the invention adopts the following technical scheme: the composition comprises the following components in parts by weight: 100 parts of polymer with glass transition temperature Tg of 0 ℃, 0.05-20 parts of polymer of copolymer of monomer with polyorganosiloxane framework and acrylic monomer, and 0.05-20 parts of crosslinking agent.
Further, the monomer of the polymer with the glass transition temperature Tg of 0 ℃ lower than the full temperature is any one or more of 2-isooctyl acrylate (2 EHA), N-ethylene-2-pyrrolidine (NVP) and hydroxyl-contained acrylic acid.
Further, the weight average molecular weight of the polymer of the copolymer of the monomer having a polyorganosiloxane framework and the acrylic monomer is 10000-35000.
Further, the cross-linking agent is an isocyanate cross-linking agent.
Further, the adhesive force (N2) of the glue after being heated for 5 minutes at the temperature of 80 ℃ and then being placed for 30 minutes at the temperature of 23 ℃ after being pasted is more than 10 times of the adhesive force (N1) after being placed for 30 minutes at the temperature of 23 ℃ after being pasted.
The preparation process of the invention is as follows:
60 parts of 2-isooctyl acrylate (2 EHA), 15 parts of N-ethylene-2-pyrrolidine (NVP), 10 parts of Methyl Methacrylate (MMA), 15 parts of 2-hydroxyethyl acrylate (HEA), and 200 parts of ethyl acetate as a polymerization solvent were added to a four-neck flask equipped with a stirring blade, a thermometer, a nitrogen introduction tube, and a cooler, and stirred at 60 ℃ for 2 hours, 0.2 parts of azobisisobutyronitrile AIBN as a thermal polymerization initiator was added thereto, and a reaction was carried out at 60 ℃ for 6 hours to obtain a polymer having a glass transition temperature Tg of 0 ℃ less than the Mw of the polymer having a glass transition temperature Tg of 0 ℃ less than the Mw of 100 ten thousand;
100 parts of toluene, 40 parts of methyl methacrylate MMA, 20 parts of Butyl Methacrylate (BMA), 20 parts of 2-ethylhexyl methacrylate (2 EHMA), 8.7 parts of a methacrylate monomer having a polyorganosiloxane skeleton with a functional group equivalent of 900g/mol, 11.3 parts of a methacrylate monomer having a polyorganosiloxane skeleton with a functional group equivalent of 4600g/mol, and 0.51 part of methyl thioglycolate as a chain reactant were put into a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen introduction tube, a cooler, and a dropping tube; then, after stirring at 70 ℃ under a nitrogen atmosphere for 1 hour, 0.2 part of azobisisobutyronitrile AIBN as a thermal polymerization initiator was added, followed by reaction at 70 ℃ for 2 hours, and then 0.1 part of azobisisobutyronitrile AIBN as a thermal polymerization initiator was added, followed by reaction at 80 ℃ for 5 hours to obtain a polymer of a copolymer of a monomer having a polyorganosiloxane framework and an acrylic monomer, wherein Mw of the polymer of the copolymer of the monomer having a polyorganosiloxane framework and the acrylic monomer was 2 ten thousand;
2.5 parts by weight of a polymer of a copolymer of a monomer having a polyorganosiloxane skeleton and an acrylic monomer and 2.5 parts by weight of an isocyanate-based crosslinking agent (an m-xylylene isocyanate adduct of 1,1, 1-trimethylolpropane) were added to 100 parts by weight of the above-mentioned solution of a polymer having a glass transition temperature Tg of 0 ℃ to prepare a glue by uniformly mixing.
After the components are adopted, the invention has the beneficial effects that: the invention provides a low-tack glue at an initial stage, which can temporarily inhibit the low adhesion force within the room temperature range (for example, 20-30 ℃) after being pasted on an adherend, and can make a contribution to the inhibition of the yield and the high quality of products including the reinforced film because good re-pasting performance can be exerted during the period; moreover, the adhesion properties can be greatly improved by aging (heating, passage of time, combination, etc.).
The specific implementation mode is as follows:
the specific implementation mode adopts the following technical scheme: the composition comprises the following components in parts by weight: polymers having a glass transition temperature Tg of 0 ℃ or lower, polymers of copolymers of monomers having a polyorganosiloxane framework with acrylic monomers and crosslinking agents;
60 parts of 2-isooctyl acrylate (2 EHA), 15 parts of N-ethylene-2-pyrrolidine (NVP), 10 parts of Methyl Methacrylate (MMA), 15 parts of 2-hydroxyethyl acrylate (HEA), and 200 parts of ethyl acetate as a polymerization solvent were added to a four-neck flask equipped with a stirring blade, a thermometer, a nitrogen introduction tube, and a cooler, and stirred at 60 ℃ for 2 hours, 0.2 parts of azobisisobutyronitrile AIBN as a thermal polymerization initiator was added thereto, and a reaction was carried out at 60 ℃ for 6 hours to obtain a polymer having a glass transition temperature Tg of 0 ℃ less than the Mw of the polymer having a glass transition temperature Tg of 0 ℃ less than the Mw of 100 ten thousand;
100 parts of toluene, 40 parts of methyl methacrylate MMA, 20 parts of Butyl Methacrylate (BMA), 20 parts of 2-ethylhexyl methacrylate (2 EHMA), 8.7 parts of a methacrylate monomer having a polyorganosiloxane skeleton with a functional group equivalent of 900g/mol, 11.3 parts of a methacrylate monomer having a polyorganosiloxane skeleton with a functional group equivalent of 4600g/mol, and 0.51 part of methyl thioglycolate as a chain reactant were put into a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen introduction tube, a cooler, and a dropping tube; then, after stirring at 70 ℃ under a nitrogen atmosphere for 1 hour, 0.2 part of azobisisobutyronitrile AIBN as a thermal polymerization initiator was added, followed by reaction at 70 ℃ for 2 hours, and then 0.1 part of azobisisobutyronitrile AIBN as a thermal polymerization initiator was added, followed by reaction at 80 ℃ for 5 hours to obtain a polymer of a copolymer of a monomer having a polyorganosiloxane framework and an acrylic monomer, wherein Mw of the polymer of the copolymer of the monomer having a polyorganosiloxane framework and the acrylic monomer was 2 ten thousand;
2.5 parts by weight of a polymer of a copolymer of a monomer having a polyorganosiloxane skeleton and an acrylic monomer and 2.5 parts by weight of an isocyanate-based crosslinking agent (an m-xylylene isocyanate adduct of 1,1, 1-trimethylolpropane) were added to 100 parts by weight of the above-mentioned solution of a polymer having a glass transition temperature Tg of 0 ℃ to prepare a glue by uniformly mixing.
After the components are adopted, the invention has the beneficial effects that: the invention provides a low-tack glue at an initial stage, which can temporarily inhibit the low adhesion force within the room temperature range (for example, 20-30 ℃) after being pasted on an adherend, and can make a contribution to the inhibition of the yield and the high quality of products including the reinforced film because good re-pasting performance can be exerted during the period; moreover, the adhesion properties can be greatly improved by aging (heating, passage of time, combination, etc.).
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (6)
1. An initial low-adhesiveness glue is characterized in that: the composition comprises the following components in parts by weight: 100 parts of polymer with glass transition temperature Tg of 0 ℃, 0.05-20 parts of polymer of copolymer of monomer with polyorganosiloxane framework and acrylic monomer, and 0.05-20 parts of crosslinking agent.
2. The initial low tack glue of claim 1, wherein: the monomer of the polymer with the glass transition temperature Tg of 0 ℃ lower than the full temperature is any one or more of 2-isooctyl acrylate, N-ethylene-2-pyrrolidine and hydroxyl-contained acrylic acid.
3. The initial low tack glue of claim 1, wherein: the weight average molecular weight of the polymer of the copolymer of the monomer having a polyorganosiloxane framework and the acrylic monomer is 10000-35000.
4. The initial low tack glue of claim 1, wherein: the cross-linking agent is isocyanate cross-linking agent.
5. The initial low tack glue of claim 1, wherein: the adhesive force of the glue after being heated for 5 minutes at the temperature of 80 ℃ after being pasted and then being placed for 30 minutes at the temperature of 23 ℃ is more than 10 times of the adhesive force after being placed for 30 minutes at the temperature of 23 ℃ after being pasted.
6. An initial low-adhesiveness glue is characterized in that: the preparation process comprises the following steps:
adding 60 parts of 2-isooctyl acrylate, 15 parts of N-ethylene-2-pyrrolidine, 10 parts of methyl methacrylate, 15 parts of 2-hydroxyethyl acrylate and 200 parts of ethyl acetate serving as a polymerization solvent into a four-neck flask provided with a stirring blade, a thermometer, a nitrogen inlet pipe and a cooler, stirring for 2 hours at 60 ℃ in a nitrogen environment, adding 0.2 part of azobisisobutyronitrile AIBN serving as a thermal polymerization initiator, and reacting for 6 hours at 60 ℃ to obtain a polymer with a glass transition temperature Tg of 0 ℃ lower than the full glass transition temperature Tg, wherein the Mw of the polymer with the glass transition temperature Tg of 0 ℃ lower than the full glass transition temperature is 100 ten thousand;
100 parts of toluene, 40 parts of methyl methacrylate, 20 parts of butyl methacrylate, 20 parts of 2-ethylhexyl methacrylate, 8.7 parts of a methacrylate monomer having a polyorganosiloxane framework with a functional group equivalent of 900g/mol, 11.3 parts of a methacrylate monomer having a polyorganosiloxane framework with a functional group equivalent of 4600g/mol, and 0.51 part of methyl thioglycolate as a chain reactant are charged in a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen introduction tube, a cooler, and a dropping tube; then, after stirring at 70 ℃ under a nitrogen atmosphere for 1 hour, 0.2 part of azobisisobutyronitrile AIBN as a thermal polymerization initiator was added, followed by reaction at 70 ℃ for 2 hours, and then 0.1 part of azobisisobutyronitrile AIBN as a thermal polymerization initiator was added, followed by reaction at 80 ℃ for 5 hours to obtain a polymer of a copolymer of a monomer having a polyorganosiloxane framework and an acrylic monomer, wherein Mw of the polymer of the copolymer of the monomer having a polyorganosiloxane framework and the acrylic monomer was 2 ten thousand;
2.5 parts by weight of a polymer of a copolymer of a monomer having a polyorganosiloxane framework and an acrylic monomer and 2.5 parts by weight of an isocyanate crosslinking agent are added to 100 parts by weight of the solution of the polymer having a glass transition temperature Tg of 0 ℃ and are uniformly mixed to prepare a glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111075907.0A CN113861896A (en) | 2021-09-14 | 2021-09-14 | Initial-stage low-adhesiveness glue |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111075907.0A CN113861896A (en) | 2021-09-14 | 2021-09-14 | Initial-stage low-adhesiveness glue |
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| CN113861896A true CN113861896A (en) | 2021-12-31 |
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| CN202111075907.0A Pending CN113861896A (en) | 2021-09-14 | 2021-09-14 | Initial-stage low-adhesiveness glue |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652447A (en) * | 2007-04-20 | 2010-02-17 | 日东电工株式会社 | Acrylic adhesive composition, acrylic adhesive sheet, and method for bonding the adhesive sheet to coated surface of automobile |
| TW201923006A (en) * | 2017-11-20 | 2019-06-16 | 日商日東電工股份有限公司 | Adhesive sheet capable of maintaining the re-workability and further increasing the adhesive force subsequently |
| CN113166600A (en) * | 2018-11-30 | 2021-07-23 | 日东电工株式会社 | Adhesive sheet |
-
2021
- 2021-09-14 CN CN202111075907.0A patent/CN113861896A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101652447A (en) * | 2007-04-20 | 2010-02-17 | 日东电工株式会社 | Acrylic adhesive composition, acrylic adhesive sheet, and method for bonding the adhesive sheet to coated surface of automobile |
| TW201923006A (en) * | 2017-11-20 | 2019-06-16 | 日商日東電工股份有限公司 | Adhesive sheet capable of maintaining the re-workability and further increasing the adhesive force subsequently |
| CN110003802A (en) * | 2017-11-20 | 2019-07-12 | 日东电工株式会社 | Bonding sheet |
| CN113166600A (en) * | 2018-11-30 | 2021-07-23 | 日东电工株式会社 | Adhesive sheet |
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Application publication date: 20211231 |