CN111234739A - Two-component temperature-resistant water-based pressure-sensitive adhesive and preparation method and application thereof - Google Patents
Two-component temperature-resistant water-based pressure-sensitive adhesive and preparation method and application thereof Download PDFInfo
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- CN111234739A CN111234739A CN202010149890.8A CN202010149890A CN111234739A CN 111234739 A CN111234739 A CN 111234739A CN 202010149890 A CN202010149890 A CN 202010149890A CN 111234739 A CN111234739 A CN 111234739A
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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
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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
- 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
- C09J11/08—Macromolecular additives
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The invention discloses a two-component temperature-resistant water-based pressure-sensitive adhesive and a preparation method and application thereof, belonging to the technical field of adhesives. The two-component temperature-resistant water-based pressure-sensitive adhesive comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 100 (2-15); the component A comprises the following components in parts by mass: 70-90% of water-based acrylic pressure-sensitive emulsion, 5-20% of tackifying emulsion, 1-3% of thickening agent, 0.1-0.5% of defoaming agent, 0.2-1% of bactericide and 0-1% of pH value regulator, wherein the sum of the mass fractions of the components is 100%; the component B is polyisocyanate with hydrophilic groups. Compared with the single-component aqueous pressure-sensitive adhesive, the double-component aqueous pressure-sensitive adhesive prepared by taking the polyisocyanate with the hydrophilic group as the component B has better temperature resistance and water boiling resistance.
Description
Technical Field
The invention relates to the technical field of adhesives, in particular to a two-component temperature-resistant water-based pressure-sensitive adhesive and a preparation method and application thereof.
Background
The aqueous acrylate pressure-sensitive adhesive emulsion has the advantages of high shear strength, wide production source, simple preparation process, high film forming speed, high transparency and excellent adhesion to various substrates, and is increasingly researched and applied in the fields of adhesives, coatings, leather, building sealing, medical polymers, water treatment and the like.
Along with the enhancement of environmental protection consciousness of people, the demand of the emulsion type acrylate pressure-sensitive adhesive is more and more, and compared with a solvent type pressure-sensitive adhesive, the emulsion type acrylate pressure-sensitive adhesive has the advantages of low cost, safety, low toxicity, easiness in operation during polymerization, higher average molecular weight and the like. However, the pure acrylic resin emulsion pressure-sensitive adhesive has poor water resistance and high temperature resistance because the molecular structure is linear and the intramolecular cross-linking is absent. These disadvantages limit the applications, for example, when a single-component pressure-sensitive adhesive emulsion is used, the problem of adhesive failure is easily caused at high temperature when a sound-deadening film of Ethylene-vinyl Acetate Copolymer (EVA) is adhered to the back of a wood-like floor, which is common in the building material industry.
Therefore, there is a need to find an aqueous pressure-sensitive adhesive with excellent temperature resistance and water resistance.
Disclosure of Invention
The embodiment of the invention aims to provide a two-component temperature-resistant water-based pressure-sensitive adhesive to solve the problems in the background technology.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
a two-component temperature-resistant water-based pressure-sensitive adhesive comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 100 (2-15);
the component A comprises the following components in parts by mass: 70-93.7 percent of water-based acrylic pressure-sensitive emulsion, 5-24.5 percent of tackifying emulsion, 1-3 percent of thickening agent, 0.1-0.5 percent of defoaming agent, 0.2-1 percent of bactericide and 0-1 percent of pH value regulator, wherein the sum of the mass fractions of the components is 100 percent;
the component B is polyisocyanate with hydrophilic groups.
As a preferable scheme of the embodiment of the invention, the component a comprises the following components in percentage by mass: 83-88% of water-based acrylic pressure-sensitive emulsion, 10-15% of tackifying emulsion, 1-2% of thickening agent, 0.1-0.3% of defoaming agent, 0.5-0.8% of bactericide and 0.4-0.8% of pH value regulator, wherein the sum of the mass fractions of the components is 100%; the solid content of the water-based acrylic pressure-sensitive emulsion is 55-65%; the polyisocyanate with the hydrophilic group is aliphatic polyisocyanate with the hydrophilic group, and the NCO content of the polyisocyanate is 10-25%. Preferably, the NCO content of the aliphatic polyisocyanate with hydrophilic groups is 20%
As another preferable scheme of the embodiment of the present invention, the tackifying emulsion is one or more of a terpene-phenol resin emulsion, a hydrogenated rosin emulsion, an esterified rosin emulsion, and a polymerized rosin emulsion; the softening point of the polymerized rosin emulsion is 80-170 ℃. Preferably, the tackifying emulsion is polymerized rosin emulsion with the softening point of 160 ℃.
As another preferable scheme of the embodiment of the present invention, the thickener is one or more of hydroxymethyl cellulose, hydroxyethyl cellulose, alkali-swelling acrylic emulsion and polyurethane emulsion. Preferably, the thickener is a polyurethane emulsion.
As another preferable mode of the embodiment of the present invention, the defoaming agent is one of a silicone defoaming agent, a polyether defoaming agent, a higher alcohol defoaming agent, and a polyether-modified silicone defoaming agent. Preferably, the defoaming agent is a higher alcohol type defoaming agent.
As another preferable scheme of the embodiment of the invention, the bactericide is one or more of methylisothiazolinone, methylchloroisothiazolinone and 1, 2-benzisothiazolin-3-one. Preferably, the bactericide is 1, 2-benzisothiazolin-3-one.
As another preferable scheme of the embodiment of the invention, the pH regulator is one or more of monoethanolamine, diethanolamine, triethanolamine, ammonia water and 2-amino-2-methyl-1-propanol; preferably, the pH regulator is ammonia water.
Another object of the embodiment of the present invention is to provide a method for preparing the above two-component temperature-resistant water-based pressure-sensitive adhesive, which comprises the following steps:
weighing the water-based acrylic pressure-sensitive emulsion, the tackifying emulsion, the thickening agent, the defoaming agent, the bactericide and the pH value regulator according to the mass fraction for later use;
mixing the aqueous acrylic pressure-sensitive emulsion, the tackifying emulsion, the defoaming agent, the bactericide and the pH value regulator together, and stirring and dispersing to obtain a dispersion liquid;
adding the thickening agent into the dispersion liquid, and stirring and dispersing to obtain a component A;
weighing polyisocyanate with hydrophilic groups as a component B according to the mass ratio of the component A to the component B;
and mixing the component A with the component B to obtain the aqueous pressure-sensitive adhesive.
The embodiment of the invention also aims to provide the water-based pressure-sensitive adhesive prepared by the preparation method.
The embodiment of the invention also aims to provide an application of the water-based pressure-sensitive adhesive in building material bonding.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
according to the two-component temperature-resistant water-based pressure-sensitive adhesive provided by the embodiment of the invention, the proportion of the acrylic pressure-sensitive emulsion, the tackifying emulsion, the thickening agent, the defoaming agent, the bactericide and the pH value regulator is reasonably matched, and the appropriate amount of the polyisocyanate is controlled, so that not only can the peeling strength required by the wood-like floor back adhesive be ensured, but also the temperature resistance of the water-based pressure-sensitive adhesive can be greatly improved, and the water boiling resistance of a product of the water-based pressure-sensitive adhesive is improved.
The water-based pressure-sensitive adhesive provided by the embodiment of the invention is different from the existing single-component water-based acrylate pressure-sensitive adhesive emulsion, and can be used for greatly improving the temperature resistance and the water resistance of the adhesive by adopting a double-component water-based acrylate pressure-sensitive adhesive formula process and controlling the dosage of a curing agent. The invention takes the compounded acrylic ester pressure-sensitive adhesive emulsion as the component A, adopts aliphatic polyisocyanate with hydrophilic groups as the component B of the curing agent, and utilizes the copolymerization reaction of isocyanate-NCO groups and-OH groups of the acrylic ester emulsion to generate urethane bonds, thereby improving the cross-linking density among copolymer molecular chains, improving the cohesive strength and the peeling strength of the polymer, and being beneficial to improving the heat resistance and the water resistance of the pressure-sensitive adhesive. In addition, a proper amount of tackifying resin is added into the acrylate pressure-sensitive adhesive emulsion, so that the initial adhesion and the peel strength of the adhesive can be obviously improved. In order to make the emulsion suitable for the coating process of pressure-sensitive adhesive and obtain other practical properties, proper amounts of thickener, defoamer, bactericide and pH regulator must be added. The addition of the curing agent has great influence on the adhesiveness of the pressure-sensitive adhesive and the performance of the adhesive film, and when the addition of the curing agent is large, the cohesive force of the adhesive is increased, but the adhesive force is greatly reduced; when the amount of the curing agent added is small, the adhesive does not achieve the intended bonding effect. Therefore, it is necessary to properly design the amount of the curing agent to be added to obtain a pressure-sensitive adhesive having excellent properties.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides a two-component temperature-resistant water-based pressure-sensitive adhesive, and the preparation method comprises the following steps:
(1) 350kg of aqueous acrylic pressure-sensitive emulsion, 122.5kg of tackifying resin, 15kg of thickening agent, 2.5kg of defoaming agent, 5kg of bactericide and 5kg of pH value regulator are weighed for later use. Wherein the aqueous acrylic pressure sensitive emulsion is a V206AP emulsion of Basff; the viscosity-increasing emulsion is TSR-5100 emulsion of Tongxuan Lixin; the thickening agent is RM-8W emulsion of Rohm and Haas; the defoaming agent is an organic silicon defoaming agent; the bactericide is methylisothiazolinone; the pH regulator is a mixture of monoethanolamine, diethanolamine and 2-amino-2-methyl-1-propanol.
(2) The aqueous acrylic pressure-sensitive emulsion, the tackifying emulsion, the defoaming agent, the bactericide and the pH value regulator are placed in a 600L reaction kettle, and are stirred at the frequency of 10Hz and dispersed at the frequency of 10Hz to obtain a dispersion liquid.
(3) Adding the thickening agent into the dispersion, stirring at the frequency of 10Hz, dispersing at the frequency of 20Hz, testing the viscosity, and filtering to obtain the component A.
(4) Taking aliphatic polyisocyanate with 10 percent of NCO and hydrophilic groups as a component B, and mixing the component A and the component B according to the mass ratio of 100:15 to obtain the water-based pressure-sensitive adhesive.
Example 2
The embodiment provides a two-component temperature-resistant water-based pressure-sensitive adhesive, and the preparation method comprises the following steps:
(1) 468.5kg of aqueous acrylic pressure-sensitive emulsion, 25kg of tackifying emulsion, 5kg of thickening agent, 0.5kg of defoaming agent and 1kg of bactericide are weighed for later use. Wherein the water-based acrylic pressure-sensitive emulsion is BLJ-509 emulsion which is good in Shanghai Baolijia; the tackifying emulsion is TSR-1650 polymerized rosin emulsion of Tongxuan Lixin; the softening point of the polymerized rosin emulsion is 160 ℃; the thickener is a mixture of hydroxymethyl cellulose and alkali-swelling acrylic emulsion (Rohm and Hass TT-935 emulsion); the defoaming agent is polyether defoaming agent; the bactericide is a mixture of methylchloroisothiazolinone and 1, 2-benzisothiazolin-3-one.
(2) The aqueous acrylic pressure-sensitive emulsion, the tackifying emulsion, the defoaming agent, the bactericide and the pH value regulator are placed in a 600L reaction kettle, and are stirred at the frequency of 10Hz and dispersed at the frequency of 10Hz to obtain a dispersion liquid.
(3) Adding the thickening agent into the dispersion, stirring at the frequency of 10Hz, dispersing at the frequency of 20Hz, testing the viscosity, and filtering to obtain the component A.
(4) And (2) taking aliphatic polyisocyanate with a hydrophilic group and NCO content of 25% as a component B, and mixing the component A and the component B according to the mass ratio of 100:2 to obtain the water-based pressure-sensitive adhesive.
Example 3
The embodiment provides a two-component temperature-resistant water-based pressure-sensitive adhesive, and the preparation method comprises the following steps:
(1) 420.5kg of aqueous acrylic pressure-sensitive emulsion, 60kg of tackifying emulsion, 10kg of thickening agent, 1.5kg of defoaming agent, 4kg of bactericide and 4kg of pH value regulator are weighed for later use. Wherein the water-based acrylic pressure-sensitive emulsion is BLJ-509 emulsion which is good in Shanghai Baolijia; the tackifying emulsion is TSR-5901 terpene phenol resin emulsion of Tongxuan Lixin; the thickening agent is hydroxymethyl cellulose; the defoaming agent is polyether modified organic silicon defoaming agent; the bactericide is a mixture of methylisothiazolinone, methylchloroisothiazolinone and 1, 2-benzisothiazolin-3-one; the pH value regulator is a mixture of triethanolamine and ammonia water.
(2) The aqueous acrylic pressure-sensitive emulsion, the tackifying emulsion, the defoaming agent, the bactericide and the pH value regulator are placed in a 600L reaction kettle, and are stirred at the frequency of 10Hz and dispersed at the frequency of 10Hz to obtain a dispersion liquid.
(3) Adding the thickening agent into the dispersion, stirring at the frequency of 10Hz, dispersing at the frequency of 20Hz, testing the viscosity, and filtering to obtain the component A.
(4) Taking aliphatic polyisocyanate with NCO content of 18% and hydrophilic groups as a component B, and mixing the component A and the component B according to the mass ratio of 100:9 to obtain the water-based pressure-sensitive adhesive.
Example 4
The embodiment provides a two-component temperature-resistant water-based pressure-sensitive adhesive, and the preparation method comprises the following steps:
(1) 415kg of aqueous acrylic pressure-sensitive emulsion, 75kg of tackifying emulsion, 5kg of thickening agent, 0.5kg of defoaming agent, 2.5kg of bactericide and 2kg of pH value regulator are weighed for later use. Wherein, the water-based acrylic pressure-sensitive emulsion is 8600 emulsion of the classical chemistry; the tackifying emulsion is TSR-1650 polymerized rosin emulsion of Tongxuan Lixin; the softening point of the polymerized rosin emulsion is 160 ℃; the thickening agent is RM-8W emulsion of Rohm and Haas; the defoaming agent is a high-carbon alcohol type defoaming agent; the bactericide is 1, 2-benzisothiazolin-3-one; the pH value regulator is ammonia water.
(2) The aqueous acrylic pressure-sensitive emulsion, the tackifying emulsion, the defoaming agent, the bactericide and the pH value regulator are placed in a 600L reaction kettle, and are stirred at the frequency of 10Hz and dispersed at the frequency of 10Hz to obtain a dispersion liquid.
(3) Adding the thickening agent into the dispersion, stirring at the frequency of 10Hz, dispersing at the frequency of 20Hz, testing the viscosity, and filtering to obtain the component A.
(4) Taking aliphatic polyisocyanate with 20 percent of NCO and hydrophilic groups as a component B, and mixing the component A and the component B according to the mass ratio of 100:2 to obtain the water-based pressure-sensitive adhesive.
Example 5
The embodiment provides a two-component temperature-resistant water-based pressure-sensitive adhesive, and the preparation method comprises the following steps:
(1) 415kg of aqueous acrylic pressure-sensitive emulsion, 75kg of tackifying emulsion, 5kg of thickening agent, 0.5kg of defoaming agent, 2.5kg of bactericide and 2kg of pH value regulator are weighed for later use. Wherein the water-based acrylic pressure-sensitive emulsion is constant and permanent LR-601LV emulsion; the tackifying emulsion is TSR-1650 polymerized rosin emulsion of Tongxuan Lixin; the softening point of the polymerized rosin emulsion is 160 ℃; the thickening agent is RM-8W emulsion of Rohm and Haas; the defoaming agent is a high-carbon alcohol type defoaming agent; the bactericide is 1, 2-benzisothiazolin-3-one; the pH value regulator is ammonia water.
(2) The aqueous acrylic pressure-sensitive emulsion, the tackifying emulsion, the defoaming agent, the bactericide and the pH value regulator are placed in a 600L reaction kettle, and are stirred at the frequency of 10Hz and dispersed at the frequency of 10Hz to obtain a dispersion liquid.
(3) Adding the thickening agent into the dispersion, stirring at the frequency of 10Hz, dispersing at the frequency of 20Hz, testing the viscosity, and filtering to obtain the component A.
(4) Taking aliphatic polyisocyanate with 20 percent of NCO and hydrophilic groups as a component B, and mixing the component A and the component B according to the mass ratio of 100:5 to obtain the water-based pressure-sensitive adhesive.
Example 6
The embodiment provides a two-component temperature-resistant water-based pressure-sensitive adhesive, and the preparation method comprises the following steps:
(1) 440kg of aqueous acrylic pressure-sensitive emulsion, 50kg of tackifying emulsion, 5kg of thickening agent, 0.5kg of defoaming agent, 2.5kg of bactericide and 2kg of pH value regulator are weighed for later use. Wherein, the water-based acrylic pressure-sensitive emulsion is 0705 emulsion in photoproduction chemical; the tackifying emulsion is TSR-1650 polymerized rosin emulsion of Tongxuan Lixin; the softening point of the polymerized rosin emulsion is 160 ℃; the thickening agent is RM-8W emulsion of Rohm and Haas; the defoaming agent is a high-carbon alcohol type defoaming agent; the bactericide is 1, 2-benzisothiazolin-3-one; the pH value regulator is ammonia water.
(2) The aqueous acrylic pressure-sensitive emulsion, the tackifying emulsion, the defoaming agent, the bactericide and the pH value regulator are placed in a 600L reaction kettle, and are stirred at the frequency of 10Hz and dispersed at the frequency of 10Hz to obtain a dispersion liquid.
(3) Adding the thickening agent into the dispersion, stirring at the frequency of 10Hz, dispersing at the frequency of 20Hz, testing the viscosity, and filtering to obtain the component A.
(4) Taking aliphatic polyisocyanate with 20 percent of NCO and hydrophilic groups as a component B, and mixing the component A and the component B according to the mass ratio of 100:5 to obtain the water-based pressure-sensitive adhesive.
Comparative example 1
The comparative example provides a one-component aqueous pressure-sensitive adhesive, the preparation method of which comprises the following steps:
(1) 440kg of aqueous acrylic pressure-sensitive emulsion, 75kg of tackifying emulsion, 5kg of thickening agent, 0.5kg of defoaming agent, 2.5kg of bactericide and 2kg of pH value regulator are weighed for later use. Wherein the water-based acrylic pressure-sensitive emulsion is constant and permanent LR-601LV emulsion; the tackifying emulsion is TSR-1650 polymerized rosin emulsion of Tongxuan Lixin; the softening point of the polymerized rosin emulsion is 160 ℃; the thickening agent is RM-8W emulsion of Rohm and Haas; the defoaming agent is a high-carbon alcohol type defoaming agent; the bactericide is 1, 2-benzisothiazolin-3-one; the pH value regulator is ammonia water.
(2) The aqueous acrylic pressure-sensitive emulsion, the tackifying emulsion, the defoaming agent, the bactericide and the pH value regulator are placed in a 600L reaction kettle, and are stirred at the frequency of 10Hz and dispersed at the frequency of 10Hz to obtain a dispersion liquid.
(3) And adding the thickening agent into the dispersion, stirring at the frequency of 10Hz, dispersing at the frequency of 20Hz, testing the viscosity, and filtering to obtain the water-based pressure-sensitive adhesive.
Respectively using the aqueous pressure-sensitive adhesives obtained in the above examples 4-6 and comparative example 1, adhering an EVA (ethylene vinyl acetate) mute film on the back of an SPC (styrene Plastic Co mposite) plate, and curing at the normal temperature of 25 ℃ for 2 days to prepare 4 groups of sample parts; under the same experimental conditions, the 4 groups of samples were subjected to normal temperature 180 degree peel force, temperature resistance (80 ℃, 6h) and boiling resistance (80 ℃, 2h) tests, and the test results are shown in table 1 below.
TABLE 1
As can be seen from table 1 above, compared with the single-component aqueous pressure-sensitive adhesive, the two-component aqueous pressure-sensitive adhesive prepared by using the polyisocyanate with a hydrophilic group as the component B in the embodiment of the present invention has better temperature resistance and boiling resistance.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A two-component temperature-resistant water-based pressure-sensitive adhesive is characterized by comprising a component A and a component B, wherein the mass ratio of the component A to the component B is 100 (2-15);
the component A comprises the following components in parts by mass: 70-93.7% of water-based acrylic pressure-sensitive emulsion, 5-24.5% of tackifying emulsion, 1-3% of thickening agent, 0.1-0.5% of defoaming agent, 0.2-1% of bactericide and 0-1% of pH value regulator, wherein the sum of the mass fractions of the components is 100%;
the component B is polyisocyanate with hydrophilic groups.
2. The two-component temperature-resistant water-based pressure-sensitive adhesive according to claim 1, wherein the component A comprises the following components in percentage by mass: 83-88% of water-based acrylic pressure-sensitive emulsion, 10-15% of tackifying emulsion, 1-2% of thickening agent, 0.1-0.3% of defoaming agent, 0.5-0.8% of bactericide, 0.4-0.8% of pH value regulator, and the sum of the mass fractions of the components being 100%; the solid content of the water-based acrylic pressure-sensitive emulsion is 55-65%; the polyisocyanate with the hydrophilic group is aliphatic polyisocyanate with the hydrophilic group, and the NCO content of the polyisocyanate is 10-25%.
3. The two-component temperature-resistant water-based pressure-sensitive adhesive according to claim 1 or 2, wherein the tackifying emulsion is one or more of a terpene-phenol resin emulsion, a hydrogenated rosin emulsion, an esterified rosin emulsion and a polymerized rosin emulsion; the softening point of the polymerized rosin emulsion is 80-170 ℃.
4. The two-component temperature-resistant aqueous pressure-sensitive adhesive according to claim 1 or 2, wherein the thickener is one or more of hydroxymethyl cellulose, hydroxyethyl cellulose, alkali-swellable acrylic emulsion and polyurethane emulsion.
5. The two-component temperature-resistant aqueous pressure-sensitive adhesive according to claim 1 or 2, wherein the defoamer is one of a silicone defoamer, a polyether defoamer, a higher alcohol defoamer and a polyether modified silicone defoamer.
6. The two-component temperature-resistant water-based pressure-sensitive adhesive according to claim 1 or 2, wherein the bactericide is one or more of methylisothiazolinone, methylchloroisothiazolinone and 1, 2-benzisothiazolin-3-one.
7. The two-component temperature-resistant aqueous pressure-sensitive adhesive according to claim 1 or 2, wherein the pH regulator is one or more of monoethanolamine, diethanolamine, triethanolamine, ammonia water and 2-amino-2-methyl-1-propanol.
8. A preparation method of the two-component temperature-resistant water-based pressure-sensitive adhesive according to any one of claims 1 to 7, characterized by comprising the following steps:
weighing the water-based acrylic pressure-sensitive emulsion, the tackifying emulsion, the thickening agent, the defoaming agent, the bactericide and the pH value regulator according to the mass fraction for later use;
mixing the aqueous acrylic pressure-sensitive emulsion, the tackifying emulsion, the defoaming agent, the bactericide and the pH value regulator together, and stirring and dispersing to obtain a dispersion liquid;
adding the thickening agent into the dispersion liquid, and stirring and dispersing to obtain a component A;
weighing polyisocyanate with hydrophilic groups as a component B according to the mass ratio of the component A to the component B;
and mixing the component A with the component B to obtain the aqueous pressure-sensitive adhesive.
9. An aqueous pressure-sensitive adhesive prepared by the process according to claim 8.
10. Use of the aqueous pressure-sensitive adhesive according to any one of claims 1 to 7 and 9 for building material bonding.
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Application publication date: 20200605 |