CN114133530B - Polyurethane acrylic ester with NCO reactive group and UV moisture curing adhesive with resin - Google Patents
Polyurethane acrylic ester with NCO reactive group and UV moisture curing adhesive with resin Download PDFInfo
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- CN114133530B CN114133530B CN202111651793.XA CN202111651793A CN114133530B CN 114133530 B CN114133530 B CN 114133530B CN 202111651793 A CN202111651793 A CN 202111651793A CN 114133530 B CN114133530 B CN 114133530B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
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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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses polyurethane acrylic ester with NCO reactive groups and a UV moisture curing adhesive with the polyurethane acrylic ester. The UV moisture curing adhesive is prepared from the following raw materials in parts by weight: 10-50 parts of polyurethane acrylic ester with NCO reaction groups, 10-50 parts of active monomer, 20-40 parts of tackifying resin, 1-5 parts of thixotropic agent, 1-5 parts of photoinitiator, 0.01-0.1 part of catalyst, 0.1-10 parts of auxiliary agent, 0.5-2 parts of stabilizer and 0.1-1 part of black pigment. The adhesive adopts the polyurethane acrylate with NCO reaction groups which is specially prepared, and after UV irradiation, the adhesive is semi-cured, but has stronger initial viscosity, and can replace double-sided adhesive tapes to attach opaque substrates OC. The adhesive can be further cured by moisture after bonding so as to further improve the bonding strength and further play a role in reinforcing the bonding effect of the base material. The adhesive can be used for an automatic dispensing process, can be finished in tens of seconds, and is simple to operate and high in intelligence.
Description
Technical Field
The invention relates to the technical field of adhesive glue preparation, in particular to an ultraviolet light moisture curing adhesive suitable for a middle frame assembly process of a television LCD screen package, which comprises polyurethane acrylate with NCO reaction groups.
Background
Currently, in the process of assembling a middle frame of a LCD screen package of a television, the display screen and the OC are usually assembled by adhesive tape or glue for adhesion and fixation. The middle frame substrate is glued or stuck with double-sided adhesive tape with certain adhesive strength, and then OC is stuck to play a role in fixing, and meanwhile, the double-sided adhesive tape has a shading effect and reduces exposure errors. However, most of the prior adhesive tapes are imported, the cost is high, die cutting is needed before the adhesive tapes are used, and meanwhile, manual operation is not suitable for the development trend. Most importantly, the adhesive force on some special base materials is insufficient, the primer is usually required to be coated, the time and the cost are consumed while the procedure is increased, the construction width of the more advanced ultra-narrow suspended screen is only 0.9mm, and the double-sided adhesive tape is not applicable. In order to solve the above problems, an adhesive, such as a uv+moisture dual curing pressure-sensitive adhesive provided in CN 110079265A and a preparation method thereof, have been proposed, but there are certain limitations that the adhesive is non-black and has no shading effect. If the black pigment is simply and directly added into the adhesive, the ultraviolet light has light curing depth on the adhesive under the black condition, the curing is limited, the bonding strength is not high after the bonding, and the adhesive is easy to fall off. Meanwhile, the general UV moisture dual-curing adhesive can be directly dried after being irradiated by UV, so that the problems of no initial adhesion, insufficient adhesion and easy falling after being attached are caused. In addition, the hot melt adhesive of different types needs to be heated at a high temperature before being used, and obviously is not applicable to a short-time operation process. And the high-strength bonding effect is unfavorable for repairing, the holding adhesion is generally insufficient, and the reliability is poor. And the UV adhesive is difficult to construct on the premise of light-tight base materials.
Therefore, how to overcome the defects of shallow solidification depth, insufficient initial adhesion and adhesion force, low adhesion strength after lamination, inconvenient use and the like of the existing UV moisture dual-curing adhesive is a problem to be solved in the industry.
Disclosure of Invention
The invention provides an ultraviolet-moisture curing adhesive capable of replacing a double-sided adhesive tape, which aims to solve the problems of shallow curing depth, insufficient initial adhesion and adhesion force, low adhesion strength after lamination and inconvenient use of the existing ultraviolet-moisture curing adhesive. The adhesive has the advantages of small dosage, high strength, good reliability, convenient use and suitability for opaque substrates.
The invention provides polyurethane acrylic ester with NCO reaction groups, which is prepared from the following raw materials in parts by weight:
150 parts of polyester polyol or polyether polyol, 150 parts of isocyanate trimer or isocyanate dimer, 20 parts of hydroxyl monomer, 180 parts of diluent monomer, 0.1-0.5 part of catalyst and 0.1-0.5 part of polymerization inhibitor.
Preferably, the polyester polyol is one of Dynacoll 7110, 7130, 7210, 7230, priplast3196, priplast1838, priplast3294, priplast3238 or PCL 220, 220n,220l,220cp of jejunum.
Preferably, the polyether polyol is one of C2040, C2140 of Wanhua chemistry, PTMG650, PTMG850 or PTMG1000 of Mitsubishi chemistry.
Preferably, the isocyanate trimer or isocyanate dimer is one of HDI, MDI, HMDI or IPDI.
Preferably, the diluent monomer is at least one of a methacrylic acid monomer, an acrylic acid monomer, a methacrylate ester monomer or an acrylate ester monomer.
Further, the diluent monomer is at least one of lauryl methacrylate, lauryl acrylate, isodecyl acrylate, isooctyl acrylate, ethoxyethoxyethyl acrylate, isobornyl methacrylate, isobornyl acrylate, N-dimethylpropionamide, 2- (ethoxy) ethoxyethyl acrylate, ethoxylated trimethylolpropane triacrylate or isodecyl acrylate. Isobornyl (meth) acrylate is most preferred.
Preferably, the catalyst is at least one of an organotin compound, a bismuth compound, an amine substance, a morpholinyl group and derivatives thereof. Further, the catalyst is an organotin compound or dibutyltin dilaurate.
Preferably, the polymerization inhibitor is at least one of para-hydroxyanisole, hydroquinone and phenothiazine.
Preferably, the hydroxyl monomer is at least one of hydroxyethyl acrylate, hydroxyethyl methacrylate and hydroxypropyl acrylate. Further, hydroxyethyl acrylate is preferable.
The invention also provides a UV moisture curing adhesive with polyurethane acrylic ester with NCO reaction groups, which is prepared from the following raw materials in parts by weight: 10-50 parts of polyurethane acrylic ester with NCO reaction groups, 10-50 parts of active monomer, 20-40 parts of tackifying resin, 1-5 parts of thixotropic agent, 1-5 parts of photoinitiator, 0.01-0.1 part of catalyst, 0.1-10 parts of auxiliary agent, 0.5-2 parts of stabilizer and 0.1-1 part of black pigment.
Preferably, the reactive monomer is at least one of a methacrylic acid monomer, an acrylic acid monomer, a methacrylate ester monomer, or an acrylate ester monomer.
Further, the active monomer is at least one of lauryl methacrylate, lauryl acrylate, isodecyl acrylate, isooctyl acrylate, ethoxyethoxyethyl acrylate, isobornyl methacrylate, isobornyl acrylate and 2-phenoxyethyl acrylate.
Preferably, the tackifying resin is at least one of petroleum resin, rosin resin and derivatives thereof; further, the tackifying resin is rosin resin and derivatives thereof, and the softening point of the tackifying resin is not more than 140 ℃;
preferably, the thixotropic agent is fumed silica; further, at least one of cabot TS-720 or Caesalpinia-R202, R972 can be selected.
Preferably, the photoinitiator is at least one of 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropion, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 2-methyl-1- [4- (methylthio) phenyl ] -2- (4-morpholinyl) -1-propanone, 2-phenylbenzyl-2-dimethylamine-1- (4-morpholinophenyl) butanone, diphenyl- (2, 4, 6-trimethylbenzoyl) phosphorus oxide, ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate, 2-isopropylthioxanthone, benzoin dimethyl ether, dimethylbenzoyl ketal or benzophenone.
Further, the photoinitiator is preferably phenylbis (2, 4, 6-trimethylbenzoyl) phosphine oxide and/or 2-methyl-1- [4- (methylthio) phenyl ] -2- (4-morpholinyl) -1-propanone.
Preferably, the catalyst is at least one of an organotin compound, a bismuth compound, an amine substance, a morpholinyl group and derivatives thereof. Further, the catalyst is an organotin compound.
Preferably, the auxiliary agent is an antifoaming agent or a leveling agent.
Further, the defoamer may be selected from 307, a535 of BYK, germany; the leveling agent may be selected from TEGO 370 from a winning company.
Preferably, the black pigment is carbon black or a carbon black premix supported on a UV monomer.
The invention self-prepares polyurethane acrylic ester with isocyanic acid radical and uses the resin to prepare UV/moisture curing adhesive with pressure sensitivity. When in use, the adhesive is coated on a non-light-transmitting or light-transmitting substrate, the adhesive is irradiated by UV to be in a semi-cured state, and then the other substrate is attached together. The self-made and synthesized soft and sticky polyurethane acrylate with isocyanate radical is used in the adhesive, so that the adhesive has pressure sensitivity after UV irradiation but cannot be completely solidified, and can be directly attached to a non-transparent (or transparent) substrate, and the initial adhesion is strong. Meanwhile, moisture curing can be carried out subsequently, and unreacted and complete NCO groups can further react with moisture in the air, so that the bonding strength is enhanced. Namely R-NCO+H 2 OR—NHCOOHR—NH 2 +CO 2 ↑；R—NH 2 +R-NCOR-NHCONH-R. So that the adhesive is completely cured and the required bonding strength is finally achieved. The black pigment is added into the adhesive to prepare a black system, so that the black system has a shading effect, and the initial bonding strength and the final bonding strength of the black system are improved. The adhesive has more double bond substances, and can react under ultraviolet irradiation. Namely, light is firstly irradiated to pre-cure the double bond substance to perform the primary sizing function of the glue, and the self-made soft and sticky polyurethane acrylate which is not completely cured is adopted, so that the self-made soft and sticky polyurethane acrylate has certain viscosity, and the used tackifying resin can also enhance the viscosity effect, thereby being beneficial to bonding. The adhesive of the invention is adopted to replace double-sided adhesive tape, the required requirement of the prior art can be realized by less adhesive amount, the strength is high, and the reliability is good. Meanwhile, the adhesive width can be reasonably adjusted by adapting to the process, the requirements of different widths and thicknesses are met, the adhesive dispensing process is rapid, automation can be realized, and the efficiency is high.
Drawings
FIG. 1 is a schematic illustration of an adhesive construction application of the present invention.
Detailed Description
The invention is further described below with reference to examples and figures.
The polyurethane acrylic ester with NCO reaction groups is prepared from the following raw materials in parts by weight:
the polyurethane acrylic ester with NCO reaction group is prepared from 150 parts of polyester polyol or polyether polyol, 150 parts of isocyanate trimer or isocyanate dimer, 20 parts of hydroxyl monomer, 180 parts of diluent monomer, 0.1-0.5 part of catalyst and 0.1-0.5 part of polymerization inhibitor. Wherein:
the polyester polyol can be selected from Dynacoll 7110, 7130, 7210, 7230, hedyotion Priplast3196, priplast1838, priplast3294, priplast3238 or PCL 220, 220N,220L,220CP of Japanese macroxyloid. The polyether polyol may be one of C2040, C2140, PTMG650, PTMG850 or PTMG1000 of Mitsubishi chemical. The isocyanate trimer or the isocyanate dimer can be one of HDI, MDI, HMDI or IPDI. And the diluent monomer is at least one of methacrylic acid monomer, acrylic acid monomer, methacrylate ester monomer or acrylate ester monomer. Further, the diluent monomer is at least one of lauryl methacrylate, lauryl acrylate, isodecyl acrylate, isooctyl acrylate, ethoxyethoxyethyl acrylate, isobornyl methacrylate, isobornyl acrylate, N-dimethylpropionamide, 2- (ethoxy) ethoxyethyl acrylate, ethoxylated trimethylolpropane triacrylate or isodecyl acrylate. Isobornyl (meth) acrylate is preferred. The catalyst is at least one of an organotin compound, a bismuth compound, an amine substance, a morpholinyl group and derivatives thereof. Further, the catalyst is an organotin compound or dibutyltin dilaurate. The polymerization inhibitor is at least one of p-hydroxyanisole, hydroquinone and phenothiazine. The hydroxyl monomer is at least one of hydroxyethyl acrylate, hydroxyethyl methacrylate and hydroxypropyl acrylate. Hydroxyethyl acrylate is preferred.
In order to solve the problems of shallow solidification depth, insufficient initial adhesion and adhesion strength and low adhesion strength after lamination of the existing UV moisture dual-curing adhesive, the invention also provides a UV moisture curing adhesive of polyurethane acrylate with NCO reactive groups, which is prepared from the following raw materials in parts by weight: 10-50 parts of polyurethane acrylic ester with NCO reaction groups, 10-50 parts of active monomer, 20-40 parts of tackifying resin, 1-5 parts of thixotropic agent, 1-5 parts of photoinitiator, 0.01-0.1 part of catalyst, 0.1-10 parts of auxiliary agent, 0.5-2 parts of stabilizer and 1-5 parts of black pigment. Wherein:
the active monomer is at least one of methacrylic acid monomer, acrylic acid monomer, methacrylic acid ester monomer or acrylic acid ester monomer. The reactive monomer is preferably at least one of lauryl methacrylate, lauryl acrylate, isodecyl acrylate, isooctyl acrylate, ethoxyethoxyethyl acrylate, isobornyl methacrylate, isobornyl acrylate and 2-phenoxyethyl acrylate. The tackifying resin is at least one of petroleum resin, rosin resin and derivatives thereof; rosin resins and derivatives thereof are preferred, the softening point of which does not exceed 140 ℃. The thixotropic agent is fumed silica; at least one of cabot TS-720 or Cabernet R202, R972 can be selected. The photoinitiator is at least one of 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl acetone, phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide, 2-methyl-1- [4- (methylthio) phenyl ] -2- (4-morpholinyl) -1-acetone, 2-phenylbenzyl-2-dimethyl amine-1- (4-morpholinylphenyl) butanone, diphenyl- (2, 4, 6-trimethylbenzoyl) phosphorus oxide, ethyl 2,4, 6-trimethylbenzoyl phenylphosphonate, 2-isopropylthioxanthone, benzoin dimethyl ether, dimethylbenzoyl ketal or benzophenone. Preferably the photoinitiator is preferably phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide and/or 2-methyl-1- [4- (methylthio) phenyl ] -2- (4-morpholinyl) -1-propanone. The stabilizer is at least one of water scavenger, optionally oxazolidine water scavenger, p-toluenesulfonyl isocyanate and triethyl orthoformate. Preferably an oxazolidine water scavenger. The catalyst is at least one or more of an organotin compound, a bismuth compound, an amine substance, a morpholinyl group and derivatives thereof. Organotin compounds, dibutyltin Dilaurate (DBTL) are preferred. The auxiliary agent is a defoaming agent or a leveling agent. The defoamer may be selected from the group consisting of BYK 307, A535; the leveling agent may be selected from TEGO 370 from a winning company. The black pigment can be carbon black or a carbon black premix taking a UV monomer as a carrier.
The adhesive of the present invention may be prepared as desired from, but not limited to, the examples in table 1 below.
In the embodiments 1 to 3 of the present invention, the polyurethane acrylate with NCO reactive groups is specifically prepared from the following raw materials according to the ratio: the polyester polyol is Dynacoll 7110 of Yingchangshan or the polyether polyol is C2040 of Wanhua chemistry. The isocyanate trimer or the isocyanate dimer selects HDI. And the diluent monomer is isobornyl (meth) acrylate. The catalyst is dibutyl tin dilaurate. The polymerization inhibitor is p-hydroxyanisole. The hydroxyl monomer is hydroxyethyl acrylate.
The adhesives of the present invention were prepared according to the proportions of examples 1 to 3 in table 1 above.
Example 1:
step 1, 300 parts of tackifying resin and 400 parts of active monomer are mixed and added into a reaction kettle, heated to a certain temperature, uniformly mixed, vacuumized and stirred until the mixture is clear.
And step 2, cooling to room temperature, adding 200 parts of polyurethane acrylate with NCO reaction groups into a reaction kettle, vacuumizing for a period of time, adding 50 parts of photoinitiator, and stirring uniformly.
And 3, drying 20 parts of thixotropic agent in a 120 ℃ oven for 2-3 hours, adding into a reaction kettle, finally adding 20 parts of carbon black, 10 parts of defoaming agent, 10 parts of leveling agent, 0.5 part of dibutyltin Dilaurate (DBTL), 10 parts of oxazolidine water remover, vacuumizing and stirring, and discharging under a vacuum condition to obtain the UV/moisture curing adhesive with pressure sensitivity.
Example 2:
the preparation procedure and conditions were the same as in example 1. The tackifying resin is only reduced to 200 parts, the polyurethane acrylic ester with NCO reaction groups is increased to 300 parts, and the dosage of other raw materials is unchanged, so that the UV/moisture curing adhesive with pressure sensitivity is obtained.
Example 3:
the preparation procedure and conditions were the same as in example 1. The UV/moisture curing adhesive with pressure sensitivity is obtained by only reducing the reactive monomer to 300 parts, reducing the tackifying resin to 200 parts, and increasing the polyurethane acrylate with NCO reactive groups to 300 parts under the same conditions.
Comparative example 1:
the polyurethane acrylate with NCO reaction group in example 1 of the present invention was replaced with commercially available isocyanate-containing acrylate, LR9000 from Bayer, and other materials and preparation methods were unchanged, to obtain a UV/moisture curable adhesive with pressure sensitivity.
Comparative example 2:
the polyurethane acrylate with NCO reaction group in the example 1 of the invention is replaced by the commercially available isocyanate-containing acrylate which can be selected from W23951 of five-element new material company, the dosage is increased to 300 parts, in addition, the tackifying resin is reduced to 200 parts, and other raw materials and preparation methods are unchanged, so that the UV/moisture curing adhesive with pressure sensitivity is obtained.
Basic detection side was performed for the adhesives prepared in examples 1 to 3 of the present invention:
the adhesive prepared in examples 1 to 3 and the adhesive prepared in comparative examples 1 and 2 were applied to an Al sheet, the thickness was fixed to 0.5mm, and after curing with an LED having a wavelength of 405nm and an energy of 1500mj, the cross-shaped drawing force was measured by bonding with a PC sheet, and the data are shown in Table 2 below:
as can be seen from the data in table 2, the UV/moisture curable adhesive with pressure sensitivity produced by the present invention has good initial and final strength, even higher than the adhesive strength of the double-sided tape used. In the comparative example, the polyurethane acrylate with NCO-reactive groups prepared specially is not adopted, and the initial adhesive strength and the final strength of the obtained adhesive are insufficient. Within a certain range, the initial adhesion strength can be improved by increasing the content of tackifying resin.
As shown in fig. 1, in the process of assembling the LCD screen package of the television, the adhesive of the present invention is coated on the surface of the middle frame of the LCD, and after the LED is irradiated, the adhesive is semi-cured, but has strong initial adhesion, and then the OC screen is adhered to the adhesive, so that the adhesive has strong adhesion, and can replace the double-sided adhesive tape to attach the opaque substrate OC. The adhesive disclosed by the invention has stronger initial adhesion, and can be continuously cured by moisture after being adhered so as to further improve the adhesive strength, thereby playing a role in stronger bonding effect of a substrate. The adhesive can be used for automatic dispensing, can be finished in tens of seconds, and is simple in operation and high in intelligence.
While the invention has been described in detail and with reference to the embodiments thereof, those skilled in the art may make various modifications and changes to the embodiments, and the modifications and changes should fall within the scope of the invention.
Claims (7)
1. The UV moisture curing adhesive of polyurethane acrylic ester with NCO reaction groups is characterized by being prepared from the following raw materials in parts by weight:
10-50 parts of polyurethane acrylic ester with NCO reaction groups, 10-50 parts of active monomer, 20-40 parts of tackifying resin, 1-5 parts of thixotropic agent, 1-5 parts of photoinitiator, 0.01-0.1 part of catalyst, 0.1-10 parts of auxiliary agent, 0.5-2 parts of stabilizer and 1-5 parts of black pigment;
the polyurethane acrylic ester with NCO reaction groups is prepared from 150 parts of polyester polyol or polyether polyol, 150 parts of isocyanate trimer or isocyanate dimer, 20 parts of hydroxyl monomer, 180 parts of diluent monomer, 0.1-0.5 part of catalyst and 0.1-0.5 part of polymerization inhibitor;
the polyester polyol is Dynacoll 7110 of Yingchangcai or the polyether polyol is C2040 of Wanhua chemistry, the isocyanate trimer or the isocyanate dimer is HDI trimer or HDI dimer, the diluent monomer is isobornyl (methyl) acrylate, the catalyst is dibutyl tin dilaurate, the polymerization inhibitor is p-hydroxyanisole, and the hydroxyl monomer is hydroxyethyl acrylate;
the preparation method of the UV moisture curing adhesive comprises the following steps:
step 1, firstly, mixing the tackifying resin and the active monomer, adding the mixture into a reaction kettle, heating and uniformly mixing, vacuumizing and stirring until the mixture is clear;
step 2, cooling to room temperature, adding the polyurethane acrylic ester with the NCO reaction group into a reaction kettle, vacuumizing for a period of time, adding a photoinitiator, and stirring uniformly;
and step 3, drying the thixotropic agent in a baking oven at 120 ℃ for 2-3 hours, adding the thixotropic agent into a reaction kettle, finally adding the black pigment, the auxiliary agent, the catalyst and the stabilizer, vacuumizing and stirring, and discharging under a vacuum condition to obtain the UV moisture curing adhesive.
2. The UV moisture-curable adhesive of claim 1, wherein the reactive monomer is at least one of lauryl methacrylate, lauryl acrylate, isodecyl acrylate, isooctyl acrylate, ethoxyethoxyethyl acrylate, isobornyl methacrylate, isobornyl acrylate, N-dimethylpropionamide, ethoxylated trimethylolpropane triacrylate, or isodecyl acrylate.
3. The UV moisture curable adhesive of claim 1 wherein the tackifying resin is a rosin resin and derivatives thereof having a softening point of no more than 140 ℃.
4. The UV moisture curable adhesive of claim 1 wherein the thixotropic agent is fumed silica; the stabilizer is an oxazolidine water remover.
5. The UV moisture-curable adhesive according to claim 1, wherein the photoinitiator is phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide and/or 2-methyl-1- [4- (methylthio) phenyl ] -2- (4-morpholinyl) -1-propanone.
6. The UV moisture curable adhesive of claim 1, wherein the catalyst is an organotin compound or dibutyltin dilaurate; the auxiliary agent is a defoaming agent or a leveling agent.
7. The UV moisture curable adhesive of claim 1 wherein the black pigment is carbon black or a carbon black premix supported on UV monomers.
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| CN202111651793.XA CN114133530B (en) | 2021-12-30 | 2021-12-30 | Polyurethane acrylic ester with NCO reactive group and UV moisture curing adhesive with resin |
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| CN114854352A (en) * | 2022-05-16 | 2022-08-05 | 江苏银久洲工业发展有限公司 | UV (ultraviolet) moisture dual-curing pressure-sensitive adhesive as well as preparation method and application method thereof |
| CN115537174A (en) * | 2022-08-26 | 2022-12-30 | 佳信新材料(惠州)有限公司 | Skin-friendly and low-sensitization UV (ultraviolet) moisture dual-curing glue and preparation method thereof |
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| CN116285613A (en) * | 2023-01-05 | 2023-06-23 | 东莞希乐斯科技有限公司 | Internal toughening UV/moisture dual-curing three-proofing paint and preparation method thereof |
| CN116254087A (en) * | 2023-01-06 | 2023-06-13 | 广州市润奥化工材料有限公司 | Preparation method of UV+moisture curing shading adhesive and application of UV+moisture curing shading adhesive in electron optical assembly |
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