CN111363504A - Moisture-absorption curing type acrylate pressure-sensitive adhesive and preparation method thereof - Google Patents
Moisture-absorption curing type acrylate pressure-sensitive adhesive and preparation method thereof Download PDFInfo
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- CN111363504A CN111363504A CN202010262179.3A CN202010262179A CN111363504A CN 111363504 A CN111363504 A CN 111363504A CN 202010262179 A CN202010262179 A CN 202010262179A CN 111363504 A CN111363504 A CN 111363504A
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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
- C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J151/08—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention discloses a moisture-absorption curing type acrylate pressure-sensitive adhesive and a preparation method thereof, wherein the moisture-absorption curing type acrylate pressure-sensitive adhesive is prepared from the following raw materials in parts by mass: 20-60 parts of hard monomer, 30-80 parts of soft monomer, 5-8 parts of acrylic acid-butyl acrylate (1:9) copolymer, 1-3 parts of composite emulsifier, 0.5-3 parts of ammonium persulfate, 40-70 parts of trifunctional isocyanate, 15-25 parts of xylene resin, 0.5-1 part of chain transfer agent, 6-10 parts of acid-base regulator, 45-65 parts of solvent and 45-85 parts of water-absorbing filler, wherein after absorbing moisture, the bonding strength of the prepared moisture-absorbing curing type acrylate pressure-sensitive adhesive can be improved by more than several times after several days, the initial shear strength is 300-500 kPa, and the adhesive can reach 3-5 Mpa after being placed at room temperature for 2 days; before use, the product is put into a sealed polyethylene bag, and a silica gel desiccant is added to the product, so that the product can be stored for a long time; the adhesive has high peel strength, good holding adhesion and initial adhesion, good aging resistance and water resistance, and good colloid transparency, and can be widely applied to the industries of automobiles, airplanes, machinery, buildings, packaging and the like.
Description
Technical Field
The invention relates to the technical field of pressure-sensitive adhesives, in particular to a moisture-absorbing curing type acrylate pressure-sensitive adhesive and a preparation method thereof.
Background
The pressure-sensitive adhesive is a pressure-sensitive adhesive, can be firmly adhered to a substrate to be adhered only by applying a small pressure without adding other auxiliary agents or heating, and can not influence the surface of the substrate after being uncovered, and the pressure-sensitive adhesive is characterized by easy adhesion, easy uncovering, no damage by peeling, and no drying of the adhesive layer in a longer time, so the pressure-sensitive adhesive is also called as non-setting adhesive; the pressure-sensitive adhesive product is applied to various fields of packaging, automobiles, transportation, communication, electrical appliances, building materials, machinery, aviation, light industry, sanitation and the like, and the pressure-sensitive adhesive is convenient to use, easy to operate and wide in application range and is developed rapidly.
The acrylate pressure-sensitive adhesive is the most widely applied pressure-sensitive adhesive at present, is a product of acrylate monomers and other ethylene monomers, and has the following characteristics compared with other pressure-sensitive adhesives: the product has excellent weather resistance and heat resistance almost without adding an anti-aging agent; the phase separation and migration phenomena are avoided, the transparency is good, and the oil resistance is good; has no influence on skin, and is suitable for medical field.
The acrylate pressure-sensitive adhesive has the characteristics of simple formula, good weather resistance, wide bonding range, low toxicity and the like, so the acrylate pressure-sensitive adhesive is widely applied to various fields in recent years, however, the existing acrylate pressure-sensitive adhesive has poor compatibility to solvents and oil, the adhesiveness of the acrylate pressure-sensitive adhesive is easily lost in a humid severe environment, in order to achieve a better improvement effect, correct functional resin is selected, good durability of bonding performance is developed, and the acrylate pressure-sensitive adhesive has very important significance in being applied to the humid environment.
Disclosure of Invention
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the moisture-absorbing curing type acrylate pressure-sensitive adhesive is prepared from the following raw materials in parts by mass: 20-60 parts of hard monomer, 30-80 parts of soft monomer, 5-8 parts of acrylic acid-butyl acrylate (1:9) copolymer, 1-3 parts of composite emulsifier, 0.5-3 parts of ammonium persulfate, 40-70 parts of trifunctional isocyanate, 15-25 parts of xylene resin, 0.5-1 part of chain transfer agent, 6-10 parts of acid-base regulator, 45-65 parts of solvent and 45-85 parts of water-absorbing filler.
Preferably, the feed consists of the following raw materials in parts by mass: 30 parts of hard monomer, 55 parts of soft monomer, 5 parts of acrylic acid-butyl acrylate (1:9) copolymer, 2 parts of composite emulsifier, 1.5 parts of ammonium persulfate, 60 parts of trifunctional isocyanate, 20 parts of xylene resin, 0.8 part of chain transfer agent, 9 parts of acid-base regulator, 50 parts of solvent and 65 parts of water-absorbing filler.
Preferably, the water-absorbing filler is one or more of calcium oxide, magnesium oxide, ketimine and aldimine.
Preferably, the solvent is formed by mixing toluene and ethyl acetate, and the molar ratio of the toluene to the ethyl acetate is 1: 1.
Preferably, the soft monomer consists of ethyl acrylate and butyl acrylate.
Preferably, the hard monomers consist of vinyl acetate and methyl methacrylate.
Preferably, the trifunctional isocyanate is a complex of dicyclohexylmethane diisocyanate and L-lysine diisocyanate.
Preferably, the pH regulator is triethylamine.
Preferably, the preparation method comprises the following steps:
(1) taking soft monomers and hard monomers according to the formula amount for later use;
(2) then other raw materials are added according to the formula amount to be mixed into a mixed solvent for standby;
(3) taking a three-neck flask, adding 1/2 volume of mixed solvent, soft monomer and hard monomer according to the formula amount into the three-neck flask, introducing nitrogen into the three-neck flask for protection, heating to 70 ℃ in a water area, reacting for 2 hours until the viscosity of the solution is obviously increased, adding the residual mixed solvent and water-absorbing filler, continuing to perform heat preservation reaction for 5 hours, and cooling to obtain the product.
The invention has the following advantages:
(1) the emulsion with the core-shell structure has excellent compatibility when the core shell comprises a soft-hard segment structure, and when the core shell is soft, not only can the cohesive strength be improved, but also the initial adhesive property can be improved.
(2) The moisture absorption curing type acrylate pressure-sensitive adhesive prepared by the method can improve the bonding strength by more than several times after absorbing the solvent, has the initial shear cutting degree of 300-500 kPa, and can reach 3-5 Mpa after being placed at room temperature for 2 days; before use, the product is put into a sealed polyethylene bag, and a silica gel desiccant is added to the product, so that the product can be stored for a long time;
(3) the acid-base regulator can effectively promote the reaction to move towards the polymerization direction, and the obtained pressure-sensitive adhesive has better viscosity;
(4) the soft monomer consists of ethyl acrylate and butyl acrylate, so that the prepared pressure-sensitive adhesive has excellent adhesion and flexibility, certain softness and strength and high viscosity; the hard monomers are vinyl acetate and methyl methacrylate, so that the prepared pressure-sensitive adhesive has better adhesion and weather resistance;
(5) the pressure-sensitive adhesive prepared by the invention has higher peel strength, better holding viscosity and initial viscosity, good aging resistance and solvent resistance and better colloid transparency, and can be widely applied to the industries of automobiles, airplanes, machinery, buildings, packaging and the like.
(6) The water-absorbing filler is added in the formula, so that the adhesive can be kept stable before curing after meeting water, cannot be damaged by water, cannot be mixed with water, and has high strength and good water-resistant stability after curing.
Detailed Description
Example one
The moisture-absorbing curing type acrylate pressure-sensitive adhesive is prepared from the following raw materials in parts by mass: 15 parts of hard monomer, 30 parts of soft monomer, 5 parts of acrylic acid-butyl acrylate (1:9) copolymer, 1 part of composite emulsifier, 0.5 part of ammonium persulfate, 40 parts of trifunctional isocyanate, 15 parts of xylene resin, 0.5 part of chain transfer agent, 6 parts of acid-base regulator, 45 parts of solvent and 45 parts of water-absorbing filler.
As a preferred embodiment of the embodiment, the water-absorbing filler is preferably one or more of calcium oxide, magnesium oxide, ketimine and aldimine.
As a preferred embodiment of this example, the solvent is a mixture of toluene and ethyl acetate, and the molar ratio of toluene to ethyl acetate is 1: 1.
As a preferred embodiment of this example, the soft monomer is comprised of ethyl acrylate and butyl acrylate.
As a preferred embodiment of this example, the hard monomers consist of vinyl acetate and methyl methacrylate.
As a preferred embodiment of this example, the trifunctional isocyanate is a complex of dicyclohexylmethane diisocyanate and L-lysine diisocyanate.
In a preferred embodiment of this embodiment, the pH regulator is triethylamine.
As a preferred embodiment of this example, the preparation method comprises the following steps:
(1) taking soft monomers and hard monomers according to the formula amount for later use;
(2) then other raw materials are added according to the formula amount to be mixed into a mixed solvent for standby;
(3) taking a three-neck flask, adding 1/2 volume of mixed solvent, soft monomer and hard monomer according to the formula amount into the three-neck flask, introducing nitrogen into the three-neck flask for protection, heating to 70 ℃ in a water area, reacting for 2 hours until the viscosity of the solution is obviously increased, adding the residual mixed solvent and water-absorbing filler, continuing to perform heat preservation reaction for 5 hours, and cooling to obtain the product.
Example two
The moisture-absorbing curing type acrylate pressure-sensitive adhesive is prepared from the following raw materials in parts by mass: 60 parts of hard monomer, 80 parts of soft monomer, 8 parts of acrylic acid-butyl acrylate (1:9) copolymer, 3 parts of composite emulsifier, 3 parts of ammonium persulfate, 70 parts of trifunctional isocyanate, 25 parts of xylene resin, 1 part of chain transfer agent, 10 parts of acid-base regulator, 65 parts of solvent and 85 parts of water-absorbing filler.
As a preferred embodiment of the embodiment, the water-absorbing filler is preferably one or more of calcium oxide, magnesium oxide, ketimine and aldimine.
As a preferred embodiment of this example, the solvent is a mixture of toluene and ethyl acetate, and the molar ratio of toluene to ethyl acetate is 1: 1.
As a preferred embodiment of this example, the soft monomer is comprised of ethyl acrylate and butyl acrylate.
As a preferred embodiment of this example, the hard monomers consist of vinyl acetate and methyl methacrylate.
As a preferred embodiment of this example, the trifunctional isocyanate is a complex of dicyclohexylmethane diisocyanate and L-lysine diisocyanate.
In a preferred embodiment of this embodiment, the pH regulator is triethylamine.
As a preferred embodiment of this example, the preparation method comprises the following steps:
(1) taking soft monomers and hard monomers according to the formula amount for later use;
(2) then other raw materials are added according to the formula amount to be mixed into a mixed solvent for standby;
(3) taking a three-neck flask, adding 1/2 volume of mixed solvent, soft monomer and hard monomer according to the formula amount into the three-neck flask, introducing nitrogen into the three-neck flask for protection, heating to 70 ℃ in a water area, reacting for 2 hours until the viscosity of the solution is obviously increased, adding the residual mixed solvent and water-absorbing filler, continuing to perform heat preservation reaction for 5 hours, and cooling to obtain the product.
EXAMPLE III
The moisture-absorbing curing type acrylate pressure-sensitive adhesive is prepared from the following raw materials in parts by mass: 30 parts of hard monomer, 55 parts of soft monomer, 5 parts of acrylic acid-butyl acrylate (1:9) copolymer, 2 parts of composite emulsifier, 1.5 parts of ammonium persulfate, 60 parts of trifunctional isocyanate, 20 parts of xylene resin, 0.8 part of chain transfer agent, 9 parts of acid-base regulator, 50 parts of solvent and 65 parts of water-absorbing filler.
As a preferred embodiment of the embodiment, the water-absorbing filler is preferably one or more of calcium oxide, magnesium oxide, ketimine and aldimine.
As a preferred embodiment of this example, the solvent is a mixture of toluene and ethyl acetate, and the molar ratio of toluene to ethyl acetate is 1: 1.
As a preferred embodiment of this example, the soft monomer is comprised of ethyl acrylate and butyl acrylate.
As a preferred embodiment of this example, the hard monomers consist of vinyl acetate and methyl methacrylate.
As a preferred embodiment of this example, the trifunctional isocyanate is a complex of dicyclohexylmethane diisocyanate and L-lysine diisocyanate.
In a preferred embodiment of this embodiment, the pH regulator is triethylamine.
As a preferred embodiment of this example, the preparation method comprises the following steps:
(1) taking soft monomers and hard monomers according to the formula amount for later use;
(2) then other raw materials are added according to the formula amount to be mixed into a mixed solvent for standby;
(3) taking a three-neck flask, adding 1/2 volume of mixed solvent, soft monomer and hard monomer according to the formula amount into the three-neck flask, introducing nitrogen into the three-neck flask for protection, heating to 70 ℃ in a water area, reacting for 2 hours until the viscosity of the solution is obviously increased, adding the residual mixed solvent and water-absorbing filler, continuing to perform heat preservation reaction for 5 hours, and cooling to obtain the product.
Example four
The moisture-absorbing curing type acrylate pressure-sensitive adhesive is prepared from the following raw materials in parts by mass: 35 parts of hard monomer, 45 parts of soft monomer, 6 parts of acrylic acid-butyl acrylate (1:9) copolymer, 2 parts of composite emulsifier, 2 parts of ammonium persulfate, 60 parts of trifunctional isocyanate, 20 parts of xylene resin, 0.7 part of chain transfer agent, 8 parts of acid-base regulator, 50 parts of solvent and 60 parts of water-absorbing filler.
As a preferred embodiment of the embodiment, the water-absorbing filler is preferably one or more of calcium oxide, magnesium oxide, ketimine and aldimine.
As a preferred embodiment of this example, the solvent is a mixture of toluene and ethyl acetate, and the molar ratio of toluene to ethyl acetate is 1: 1.
As a preferred embodiment of this example, the soft monomer is comprised of ethyl acrylate and butyl acrylate.
As a preferred embodiment of this example, the hard monomers consist of vinyl acetate and methyl methacrylate.
As a preferred embodiment of this example, the trifunctional isocyanate is a complex of dicyclohexylmethane diisocyanate and L-lysine diisocyanate.
In a preferred embodiment of this embodiment, the pH regulator is triethylamine.
As a preferred embodiment of this example, the preparation method comprises the following steps:
(1) taking soft monomers and hard monomers according to the formula amount for later use;
(2) then other raw materials are added according to the formula amount to be mixed into a mixed solvent for standby;
(3) taking a three-neck flask, adding 1/2 volume of mixed solvent, soft monomer and hard monomer according to the formula amount into the three-neck flask, introducing nitrogen into the three-neck flask for protection, heating to 70 ℃ in a water area, reacting for 2 hours until the viscosity of the solution is obviously increased, adding the residual mixed solvent and water-absorbing filler, continuing to perform heat preservation reaction for 5 hours, and cooling to obtain the product.
First, set up the comparative example
Compared with the inventive example, the soft monomer provided in comparative example 1 is only ethyl acrylate or butyl acrylate, and the hard monomer is only vinyl acetate or methyl methacrylate; the composite emulsifier set in comparative example 2 was changed to a single emulsifier; in the comparative example 3, the pH regulator was changed from triethylamine to sodium bicarbonate.
Second, performance test results of the adhesive in each embodiment of the invention
| Examples | Example 1 | Example 2 | Example 3 | Example 4 | Comparative example 1 | Comparative example 2 | Comparative example 3 |
| Solids content [% ]] | 50.5 | 51.3 | 51.1 | 51.2 | 51.0 | 45.1 | 50.2 |
| Beginning bonding (ball number #) | 9 | 8 | 9 | 9 | 6 | 5 | 7 |
| Hold sticky (Hr) | >12 | >12 | >12 | >12 | >12 | >12 | >12 |
| Peel strength [ N/25mm ]] | 16.7 | 18.8 | 18.5 | 18.6 | 12.5 | 13.8 | 16.6 |
| Thermal shear strength [ MPa ]] | 1.23 | 1.23 | 1.23 | 1.24 | 0.98 | 0.97 | 1.12 |
Note: in the above table, (1) solid content:
weighing an adhesive sample M according to GB/T2793-1g, the weight is accurate to 0.001g, the mixture is placed in a container with constant weight and weighed, the container is placed in a blast constant-temperature oven with 105 ℃ for heating for 180min, the container is taken out and placed in a drier for cooling to the room temperature, and the mass M of the container is weighed2g, solid content X meterThe calculation formula is as follows:
(2) initial adhesion strength: testing the initial adhesion strength according to the GB/T4852-2002 standard;
(3) and (3) permanent adhesion strength: the permanent bond strength was tested according to standard GB/T4851-1998;
(4) peel strength: according to GB/T2792-1998 standard, an electronic stripping machine is adopted to measure the 180-degree stripping strength;
(5) thermal shear strength: taking the pressure-sensitive adhesive in each embodiment, curing for 2h at 180 ℃, and testing the shear strength at 180 ℃ according to the method of GB 7124-86;
from the above, when the soft monomer and the hard monomer are used as separate monomers, the solid content is not changed much, the initial adhesion and the continuous adhesion time of the product are reduced, and the peel strength is reduced, that is, the viscosity of the adhesive colloid is reduced, which is shown in that the interface acting force is reduced; the single emulsifier can result in poor system emulsification, such as reduced crosslinking strength, reduced viscosity and durability, reduced solid content, and relatively low thermal shear strength. When sodium bicarbonate is used as the acid-base regulator, the compatibility of the sodium bicarbonate and a system is inferior to that of triethylamine, so that the peel strength and the thermal shear strength are reduced to a certain extent.
The pressure-sensitive adhesive prepared by the method has high solid content and high viscosity, the solvent is easy to volatilize, the construction is convenient, the solvent is quickly volatilized during the drying process, and a good bonding effect can be obtained; the adhesive has strong adhesive property to various composite films, the peel strength is further improved, the appearance storage stability is good, and the adhesive still has strong adhesive property after the solid content is reduced; the preparation process is simple, the solvent drying speed is high, and the production efficiency of the composite process is improved; the polymerization method has high polymerization speed and high molecular weight. Various monomers can be utilized for polymerization, which is beneficial to the modification of polymers and the development of products. The solvent is used as a medium, the viscosity is low, the cost is low, the reaction heat is easy to be led out, and the reaction is stable and safe.
The present invention and the embodiments thereof have been described above without limitation, and it is within the scope of the present invention that those skilled in the art should be able to devise similar structural modes and embodiments without inventive changes without departing from the spirit and scope of the present invention.
Claims (9)
1. The moisture-absorbing curing type acrylate pressure-sensitive adhesive is characterized by comprising the following raw materials in parts by mass: 20-60 parts of hard monomer, 30-80 parts of soft monomer, 5-8 parts of acrylic acid-butyl acrylate (1:9) copolymer, 1-3 parts of composite emulsifier, 0.5-3 parts of ammonium persulfate, 40-70 parts of trifunctional isocyanate, 15-25 parts of xylene resin, 0.5-1 part of chain transfer agent, 6-10 parts of acid-base regulator, 45-65 parts of solvent and 45-85 parts of water-absorbing filler.
2. The moisture-absorbing curing type acrylate pressure-sensitive adhesive according to claim 1 is characterized by comprising the following raw materials in parts by mass: 30 parts of hard monomer, 55 parts of soft monomer, 5 parts of acrylic acid-butyl acrylate (1:9) copolymer, 2 parts of composite emulsifier, 1.5 parts of ammonium persulfate, 60 parts of trifunctional isocyanate, 20 parts of xylene resin, 0.8 part of chain transfer agent, 9 parts of acid-base regulator, 50 parts of solvent and 65 parts of water-absorbing filler.
3. The moisture absorption curing type acrylate pressure sensitive adhesive according to claim 1, wherein the water absorption filler is one or more of calcium oxide, magnesium oxide, ketimine and aldimine.
4. The moisture-absorbing curable acrylate pressure-sensitive adhesive according to claim 1, wherein the solvent is a mixture of toluene and ethyl acetate, and the molar ratio of toluene to ethyl acetate is 1: 1.
5. The moisture-absorbing curable acrylate pressure-sensitive adhesive of claim 1 wherein the soft monomer is comprised of ethyl acrylate and butyl acrylate.
6. The moisture-absorbing curable acrylate pressure-sensitive adhesive according to claim 1, wherein the hard monomer is composed of vinyl acetate and methyl methacrylate.
7. The moisture-absorbing curable acrylate pressure-sensitive adhesive according to claim 1, wherein the trifunctional isocyanate is a complex of dicyclohexylmethane diisocyanate and L-lysine diisocyanate.
8. The moisture-absorbing curable acrylate pressure-sensitive adhesive according to claim 1, wherein the pH regulator is triethylamine.
9. The preparation method of the moisture absorption curing type acrylate pressure-sensitive adhesive according to claim 1, which is characterized by comprising the following steps:
(1) taking soft monomers and hard monomers according to the formula amount for later use;
(2) then other raw materials are added according to the formula amount to be mixed into a mixed solvent for standby;
(3) taking a three-neck flask, adding 1/2 volume of mixed solvent, soft monomer and hard monomer according to the formula amount into the three-neck flask, introducing nitrogen into the three-neck flask for protection, heating to 70 ℃ in a water area, reacting for 2 hours until the viscosity of the solution is obviously increased, adding the residual mixed solvent and water-absorbing filler, continuing to perform heat preservation reaction for 5 hours, and cooling to obtain the product.
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Cited By (4)
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| CN112121775A (en) * | 2020-09-17 | 2020-12-25 | 北京化工大学 | Plant fiber moisture absorption sheet with visualized efficiency and preparation method thereof |
| CN112724323A (en) * | 2020-12-22 | 2021-04-30 | 安徽明讯新材料科技股份有限公司 | Core-crosslinked core-shell acrylate pressure-sensitive adhesive emulsion and preparation method thereof |
| CN113292951A (en) * | 2021-05-25 | 2021-08-24 | 深圳日高胶带新材料有限公司 | Strippable polyacrylate pressure-sensitive adhesive and preparation method thereof |
| CN113969124A (en) * | 2021-11-05 | 2022-01-25 | 恩平市盈嘉丰胶粘制品有限公司 | Flame-retardant water emulsion type acrylate pressure-sensitive adhesive |
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| CN112724323A (en) * | 2020-12-22 | 2021-04-30 | 安徽明讯新材料科技股份有限公司 | Core-crosslinked core-shell acrylate pressure-sensitive adhesive emulsion and preparation method thereof |
| CN113292951A (en) * | 2021-05-25 | 2021-08-24 | 深圳日高胶带新材料有限公司 | Strippable polyacrylate pressure-sensitive adhesive and preparation method thereof |
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