CN114517073B - UV moisture curing adhesive for joint filling - Google Patents

UV moisture curing adhesive for joint filling Download PDF

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Publication number
CN114517073B
CN114517073B CN202210175332.8A CN202210175332A CN114517073B CN 114517073 B CN114517073 B CN 114517073B CN 202210175332 A CN202210175332 A CN 202210175332A CN 114517073 B CN114517073 B CN 114517073B
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moisture
resin
curing
parts
based compounds
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CN202210175332.8A
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CN114517073A (en
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杜伟
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Bonotec Electronic Materials Co ltd
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Bonotec Electronic Materials Co ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04Polyurethanes
    • C09J175/08Polyurethanes from polyethers
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08Macromolecular additives
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04Polyurethanes
    • C09J175/06Polyurethanes from polyesters
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04Polyurethanes
    • C09J175/14Polyurethanes having carbon-to-carbon unsaturated bonds

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention discloses a UV moisture curing adhesive for joint filling, which comprises the following components in parts by weight: 20-60 parts of UV moisture dual-curing resin, 5-20 parts of UV moisture dual-curing monomer, 10-40 parts of polyurethane prepolymer, 10-20 parts of tackifying resin, 0.1-4 parts of photoinitiator, 0.2-1.5 parts of silane coupling agent and 0.1-5 parts of filler; the adhesive with high initial strength after UV irradiation and high strength after pure moisture curing can be obtained through the formula design, and the adhesive is particularly suitable for caulking of structures which cannot be irradiated by UV light such as U-shaped structures, L-shaped structures and the like.

Description

UV moisture curing adhesive for joint filling
Technical Field
The invention relates to the technical field of adhesives, in particular to a UV moisture curing adhesive for joint filling, which is particularly suitable for blind area structures.
Background
In recent years, more and more electronic devices tend to be lighter and thinner designs; after mechanical fixing, some small gaps are usually formed, so that glue is needed for filling, and the functions of attractive appearance, adhesion or other functions are achieved; the joint compound of the pure UV system has the advantages of good wiping performance and quick surface drying, but for some U-shaped L-shaped blind area structures, the parts which cannot be found by light cannot be solidified, and the risks are brought to the use of components; some traditional UV moisture curing adhesives have the bonding force of generally less than 1MPa after pure moisture curing, and cannot meet the bonding requirement.
In response to these problems, there is a need for an adhesive that meets the requirements for adhesion after pure moisture cure.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide a UV moisture curing adhesive for caulking, which can achieve higher bonding strength after UV irradiation curing and can achieve higher strength without irradiating UV part.
The invention aims at realizing the following scheme:
the first aspect of the invention provides a UV moisture curing adhesive for caulking, which comprises the following components in parts by weight:
preferably, the UV moisture dual cure resin is a resin having isocyanate groups and radical polymerizable groups and a molecular weight (Mw) of 500 to 5000.
Preferably, the UV moisture dual curing monomer is a compound having a molecular weight (Mw) of 300 or less containing an isocyanate group and a radical polymerizable group, and isocyanate ethyl acrylate or isocyanate ethyl methacrylate and the like may be selected, and isocyanate ethyl Acrylate (AOI) is preferred.
Preferably, the radical polymerizable group is a group having an unsaturated double bond.
Preferably, the polyurethane prepolymer is a compound with terminal isocyanate groups, which is obtained by reacting a polyol with an isocyanate curing agent.
Preferably, the polyol is selected from at least one of polyether polyols (e.g., PEG, PPG, PTMEG), polycarbonate diols, and polyester polyols polymerized from a polyacid and a polyol.
Preferably, the isocyanate curing agent is selected from at least one of MDI, HDI, TDI, IPDI.
Preferably, the tackifying resin is a resin that is miscible with the polyurethane system and is selected from at least one of TPU, petroleum resin, rosin resin, thermoplastic polyester, polyacrylic resin, and epoxy resin.
Preferably, the photoinitiator comprises at least one of benzophenone-based compounds, acetophenone-based compounds, acyl phosphine oxide-based compounds, titanocene-based compounds, oxime ester-based compounds, benzoin ether-based compounds, and thioxanthones.
Preferably, the silane coupling agent is selected from the group consisting of A-187, A-189, A-174, and the like having a trimethoxy or triethoxy group at one end and a reactive group at the other end.
Preferably, the filler is solid filling powder and is at least one selected from silicon dioxide, calcium carbonate and barium sulfate.
The second aspect of the present invention provides a method for preparing a UV moisture curable adhesive for caulking, comprising the steps of: reacting polyol with isocyanate curing agent to obtain polyurethane prepolymer; the UV moisture dual-curing resin, the UV moisture dual-curing monomer, the polyurethane prepolymer, the tackifying resin, the photoinitiator, the silane coupling agent and the nitrogen atmosphere are mixed uniformly, and then the filler is added for high-speed dispersion.
Compared with the prior art, the invention has the following beneficial effects: the UV moisture curing adhesive for joint filling can achieve a pure moisture curing adhesive force of more than 3-10kgf/die (3X 3 mm) at a position which cannot be irradiated by UV light in a blind area, and the excellent adhesive force can ensure that a product comprising the design can be used more stably, so that the UV moisture curing adhesive is particularly suitable for blind area structures.
Conventional UV wet gas adhesives often incorporate pure UV curable monomers and resins such as isobornyl acrylate and double bond terminated polyester acrylates to increase initial strength. These raw materials cannot be cured at all in places where light cannot reach, which is equivalent to adding a higher content of plasticizer into one cured product, so that the pure moisture cured strength of the formula is generally below 1kgf/die (3×3 mm), while the resin adopted by the invention contains NCO groups cured by moisture, so that the pure moisture cured can also reach higher strength; the small-molecule isocyanate acrylate monomer replaces the traditional pure acrylate monomer, so that the adhesive also keeps lower viscosity and UV initial-setting viscosity; the addition of tackifying resins such as thermoplastic acrylic resin also makes the adhesive exhibit higher initial and final strengths.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.
The invention provides a preparation method of a UV moisture curing adhesive for joint filling, which comprises the following steps:
reacting polyol with isocyanate curing agent to obtain polyurethane prepolymer; and adding the photoinitiator and the UV moisture dual-curing monomer into a round bottom flask according to a proportion, mechanically stirring under a nitrogen atmosphere at 500RPM until the photoinitiator is completely dissolved, then adding the raw materials such as the UV moisture dual-curing resin, the polyurethane prepolymer, the tackifying resin, the silane coupling agent and the like, continuously stirring at 500RPM, uniformly mixing, and then adding the filler at 1500RPM for high-speed dispersion for about 30 minutes to obtain the ultraviolet light-curable resin.
The adhesive with high initial strength after UV irradiation and high strength after pure moisture curing can be obtained through the formula design, and the adhesive is particularly suitable for caulking of structures which cannot be irradiated by UV light such as U-shaped structures, L-shaped structures and the like.
Examples 1 to 6
Preparation of polyurethane prepolymer A
25 parts of polypropylene glycol (polyether polyol, PPG 1000), 30 parts of polymethylene ether glycol (PTMEG 2000), 15 parts of polyester polyol (adipic acid and hexanediol copolymer, 3500 molecular weight) were added to a 500mL three-necked flask, and mixed under stirring at 100℃under vacuum (20 mmHg) for 1.5 hours, followed by adding 30 parts of diphenylmethane diisocyanate (Wanhua, MDI-100) and stirring at 90℃for 2 hours to obtain polyurethane prepolymer A.
Preparation of polyurethane prepolymer B
10 parts of polyethylene glycol (PEG 1000), 20 parts of polymethylene ether glycol (PTMEG 2000), 5 parts of polyester polyol (terephthalic acid and hexanediol copolymer, 2000 molecular weight) were added to a 500mL three-necked flask, and mixed under stirring at 100℃under vacuum (20 mmHg) for 1.5 hours, followed by adding 30 parts of diphenylmethane diisocyanate (Wanhua, MDI-100) and stirring at 90℃for 2 hours to obtain polyurethane prepolymer B.
Preparation of polyurethane prepolymer C
70 parts of polymethylene ether glycol (PTMEG 2000) was stirred and mixed at 100℃under vacuum (20 mmHg) for 1.5 hours, and then 30 parts of diphenylmethane diisocyanate (Wanhua, MDI-100) was added thereto and stirred at 90℃for 2 hours to obtain polyurethane prepolymer C.
The raw materials are added into a flask one by one according to the proportion listed in the table 1, stirred and mixed under the protection of nitrogen, and defoamed for standby.
Table 1, UV moisture curing Adhesives obtained in examples 1 to 6, the proportions of the respective components and the results of the tests
The performance test method comprises the following steps: the adhesives prepared in examples 1 to 6 were applied to a substrate, and then a 1×1mm glass sheet was placed at the glue application point, and laminated to the substrate, and the initial strength and 24h strength after UV irradiation were tested, and the strength without UV irradiation; the UV moisture curing adhesives obtained in examples 1 to 6 were tested using a DAGA4000 pusher, and the results are shown in Table 1. As can be seen from the results in Table 1, the UV moisture curing adhesives prepared in examples 1 to 6 have initial strengths of 0.5 to 2.2kgf after UV irradiation; the intensity of 24 hours after UV irradiation is 11-19kgf; the strength after curing with pure moisture for 24 hours is 3-10kgf.
Table 2, the respective component ratios and test results of the UV moisture curing adhesives of comparative examples 1 to 7
As can be seen from the results of Table 2, the UV moisture curing adhesives prepared using the formulations of comparative examples 1 to 5 had initial strengths of 1.2 to 3kgf after UV irradiation; the intensity of 24 hours after UV irradiation is 12-20kgf; the strength after curing with pure moisture for 24 hours is only 0.3-0.8kgf. In combination with examples 1, comparative examples 1 and 2, 5, or examples 1, comparative examples 3 and 4, 5, it was found that the pure moisture cured strength was greatly reduced after the addition of the pure UV cured resin and/or UV monomer, and the pure moisture cured strength was not improved even if the amount of polyurethane prepolymer was increased, whereas in each example, the pure moisture cured strength was greatly increased after the addition of the pure UV cured resin or monomer. As can be seen from the data of comparative examples 6 and 7, the UV moisture dual curing resin, UV moisture dual curing monomer, polyurethane prepolymer and tackifying resin have reduced pure moisture curing strength after exceeding the corresponding ranges.
The invention optimizes based on the traditional formula, the UV moisture dual-curing resin, the UV moisture dual-curing monomer, the polyurethane prepolymer and the like contained in the formula contain isocyanate groups, meanwhile, the dual-curing monomer (isocyanate ethyl acrylate) plays a certain role in dissolution and dilution, the low viscosity process operability of glue is ensured, the curing rate and the basic initial strength can be ensured during UV curing, the combination has good performance in terms of pure moisture curing, higher strength can be achieved, and the adhesive is very suitable for bonding devices which are required to be rapidly fixed on the surface and have blind area filling which is not reached by UV irradiation.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the invention. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict.

Claims (5)

1. The UV moisture curing adhesive for caulking is characterized by comprising the following components in parts by weight:
the UV moisture dual-curing resin is resin containing isocyanate groups and free radical polymerizable groups and having a molecular weight of 500-50000; the UV moisture dual-curing monomer is a compound containing isocyanate groups and free radical polymerizable groups and having a molecular weight of 300 or less; the radical polymerizable group is a group having an unsaturated double bond; the polyurethane prepolymer is a compound with an isocyanate group as a terminal group, which is obtained by reacting polyol with an isocyanate curing agent, and the tackifying resin is a resin which can be mixed with a polyurethane system and is at least one of TPU, petroleum resin, rosin resin, thermoplastic polyester, polyacrylic resin and epoxy resin.
2. The UV moisture curable adhesive for caulking according to claim 1, wherein said polyol is selected from at least one of polyether polyols, polycarbonate diols, polyacids and polyol polymerized polyester polyols.
3. The UV moisture curable adhesive for caulking according to claim 1, wherein said isocyanate curing agent is selected from at least one of MDI, HDI, TDI, IPDI.
4. The UV moisture curable adhesive for caulking according to claim 1, wherein said photoinitiator comprises at least one of benzophenone-based compounds, acetophenone-based compounds, acylphosphine oxide-based compounds, titanocene-based compounds, oxime ester-based compounds, benzoin ether-based compounds, thioxanthone.
5. The UV moisture-curable adhesive for caulking according to claim 1, wherein said silane coupling agent is selected from the group consisting of compounds having trimethoxy or triethoxy groups at one end and reactive groups at the other end, and said filler is a solid filler powder selected from at least one of silica, calcium carbonate, and barium sulfate.
CN202210175332.8A 2022-02-24 2022-02-24 UV moisture curing adhesive for joint filling Active CN114517073B (en)

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CN114517073B true CN114517073B (en) 2024-02-13

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114292619B (en) * 2021-12-07 2023-09-08 深圳市摩码克来沃化学科技有限公司 Adhesive, adhesive film and bonding method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0964012A1 (en) * 1998-06-09 1999-12-15 National Starch and Chemical Investment Holding Corporation UV / Moisture cure adhesive
CN107312492A (en) * 2017-06-30 2017-11-03 张家港康得新光电材料有限公司 A kind of double solidification adhesives and adhesive tape
CN110079265A (en) * 2019-05-10 2019-08-02 广州回天新材料有限公司 A kind of UV+ moisture dual cure pressure sensitive adhesive and preparation method thereof
CN112920762A (en) * 2021-02-25 2021-06-08 杭州宝明新材料科技有限公司 UV/moisture dual-curing adhesive capable of being rapidly bonded and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0964012A1 (en) * 1998-06-09 1999-12-15 National Starch and Chemical Investment Holding Corporation UV / Moisture cure adhesive
CN107312492A (en) * 2017-06-30 2017-11-03 张家港康得新光电材料有限公司 A kind of double solidification adhesives and adhesive tape
CN110079265A (en) * 2019-05-10 2019-08-02 广州回天新材料有限公司 A kind of UV+ moisture dual cure pressure sensitive adhesive and preparation method thereof
CN112920762A (en) * 2021-02-25 2021-06-08 杭州宝明新材料科技有限公司 UV/moisture dual-curing adhesive capable of being rapidly bonded and preparation method thereof

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Denomination of invention: A UV moisture curing adhesive for joint filling

Granted publication date: 20240213

Pledgee: Shanghai Rural Commercial Bank Co.,Ltd. Huangpu sub branch

Pledgor: BONOTEC ELECTRONIC MATERIALS Co.,Ltd.

Registration number: Y2024310000911