CN115124950A - Water-based advertisement sticker pressure-sensitive adhesive with excellent wetting property and preparation method thereof - Google Patents
Water-based advertisement sticker pressure-sensitive adhesive with excellent wetting property and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/062—Copolymers with monomers not covered by C09J133/06
- C09J133/066—Copolymers with monomers not covered by C09J133/06 containing -OH groups
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- 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
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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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
- C09J133/24—Homopolymers or copolymers of amides or imides
- C09J133/26—Homopolymers or copolymers of acrylamide or methacrylamide
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Abstract
The invention belongs to the technical field of C09J133/08 adhesives, and particularly relates to a water-based advertisement sticker pressure-sensitive adhesive with excellent wettability and a preparation method thereof. A water-based advertisement sticker pressure-sensitive adhesive with excellent wettability is prepared from the following raw materials of polymer emulsion and an auxiliary agent; the polymer emulsion comprises at least one of styrene-acrylate copolymer emulsion, pure acrylic emulsion and vinyl acetate-acrylic emulsion. The water-based advertisement sticker pressure-sensitive adhesive prepared by the invention has excellent wetting property and proper viscosity, can realize a coating mode of transfer coating when being used for a cold mounting film back adhesive, basically has no shrinkage cavity and shrinkage edge within 5s, meets the requirement of production transfer coating, and avoids the oil shrinkage phenomenon which possibly occurs in the use process.
Description
Technical Field
The invention belongs to the technical field of C09J133/08 adhesives, and particularly relates to a water-based advertisement sticker pressure-sensitive adhesive with excellent wettability and a preparation method thereof.
Background
With the strengthening of the country to the environmental protection and the increasing of the environmental awareness of people and the guidance of market price trend, the water-based acrylate pressure-sensitive adhesive becomes an important development in the present stage as an advertisement sticker with back adhesive.
The traditional back adhesive mainly comprises oily acrylate pressure-sensitive adhesive, but a large amount of solvent is volatilized in the drying process, so that not only is the waste of raw materials, but also certain pollution is caused to the environment, and harm is brought to people, animals and plants, so that people try to replace the oily pressure-sensitive adhesive with the aqueous pressure-sensitive adhesive in recent years; however, the aqueous acrylate pressure-sensitive adhesive is prone to some problems during use: the main manifestations are in two aspects: firstly, the method comprises the following steps: the comprehensive performance of the water-based acrylate pressure-sensitive adhesive is inferior to that of the oil-based pressure-sensitive adhesive; II, secondly: in the transfer coating process of the water-based pressure-sensitive adhesive, oil shrinkage is easily generated on the surface of the silicone oil paper, the distribution state of the adhesive film of the product is influenced, and the wetting property of the water-based pressure-sensitive adhesive needs to be improved by adding a large amount of wetting agent.
The Chinese invention patent with the publication number of CN112661900A discloses a styrene-acrylic emulsion pressure-sensitive adhesive for a protective film, a preparation method thereof, a styrene-acrylic emulsion pressure-sensitive adhesive tape for the protective film and application thereof, wherein styrene and acrylate monomers are used for preparing the protective film for protection on the surfaces of products such as fluorocarbon aluminum profiles, electrophoretic paint aluminum profiles, stainless steel, glass, household appliances, anodic aluminum oxide profiles and the like, but the prepared pressure-sensitive adhesive is easy to generate oil shrinkage phenomenon in the use process and influences the distribution state of adhesive films of the products.
To address the coating and wetting properties of pressure sensitive adhesives at this stage, it remains a challenge for researchers.
Disclosure of Invention
In order to solve the technical problems, the first aspect of the invention provides a water-based advertisement sticker pressure-sensitive adhesive with excellent wettability, which is prepared from the following raw materials of polymer emulsion and an auxiliary agent;
the polymer emulsion comprises at least one of styrene-acrylate copolymer emulsion, pure acrylic emulsion and vinyl acetate-acrylic emulsion.
In some preferred embodiments, the polymer emulsion is a styrene-acrylate copolymer emulsion.
It is to be noted that the term "styrenic" as used herein and described means that a monomer comprises a molecular structure or a polymer comprises a polymerized unit which is styrene or a derivative thereof, for example, methylstyrene, vinyltoluene, methoxystyrene, butylstyrene, chlorostyrene or the like.
In some preferred embodiments, the styrenic comprises styrene.
As used herein, "acrylate" means a monomer comprising a molecular structure, or a polymer comprising a polymerized unit, the molecular structure or polymerized unit being: (meth) acrylic acid, alkyl (meth) acrylates, (meth) acrylamides, nitriles of (meth) acrylic acid or modified structures thereof, for example hydroxyalkyl (meth) acrylates.
Further, suitable acrylate monomers include: C1-C30 alkyl (meth) acrylate monomers, C5-C30 cycloalkyl (meth) acrylate monomers, and C5-C30 (alkyl) aryl (meth) acrylate monomers; such as methyl methacrylate, isodecyl methacrylate, and low Tg acrylic monomers. In some preferred embodiments, the low Tg acrylic monomer includes, but is not limited to, Ethyl Acrylate (EA), Butyl Acrylate (BA), t-butyl acrylate (t-BA), 2-ethylhexyl acrylate (2-EHA), lauryl acrylate, lauryl methacrylate, cetyl (meth) acrylate, eicosyl (meth) acrylate, cetyl eicosyl (meth) acrylate, behenyl (meth) acrylate, methyl acrylate, Butyl Methacrylate (BMA), and mixtures thereof.
In some preferred embodiments, the acrylates include ethyl acrylate, methacrylic acid, butyl acrylate, 2-ethylhexyl acrylate, acrylic acid, methyl methacrylate.
In some preferred embodiments, the weight of the auxiliary agent is 0.01-2% of the total weight of the preparation raw materials; preferably, the content of the active ingredients is 0.1-1% of the total weight of the preparation raw materials.
In some preferred embodiments, the auxiliary agent comprises at least one of a thickener, a wetting agent, an antifoaming agent, an emulsifier, an initiator, and a pH adjuster.
In some preferred embodiments, the weight of the thickener is 0.01-2% of the total weight of the preparation raw materials; preferably, the content is 0.1-0.8% of the total weight of the preparation raw materials.
In some preferred embodiments, the thickener is a thixotropic thickener.
In some preferred embodiments, the thixotropic thickener is selected from at least one of an alkali swellable thickener, an associative thickener, and a cellulosic thickener.
In some preferred embodiments, the alkali-swellable thickener is BLJ-935.
BLJ-935 thickener, available from Shanghai Baolijia chemical Co., Ltd.
In some preferred embodiments, the associative thickener is RM-8W.
RM-8W thickener, available from Pasteur USA;
in some preferred embodiments, the cellulosic thickener is carboxymethyl cellulose.
During the experiment, the applicant finds that the addition of the thixotropic thickening agent into the system can greatly improve the balance effect of the viscosity and the wettability of the prepared pressure-sensitive adhesive, particularly the weight of the thickening agent is 0.1-1% of the weight of the preparation raw materials, and can ensure that the pressure-sensitive adhesive can avoid the phenomenon of adhesive shrinkage when used on the surface of a cold laminating film, and the applicant speculates that the reason of the phenomenon is that: the thixotropic thickening agent added into the system contains hydrophobic and hydrophilic groups, and after the pressure-sensitive adhesive system is added, the increase of the thickness of a system hydration layer can be slowed down, so that the better leveling effect is ensured, the possibility of coating the surface of a cold mounting film is improved, and the internal defects and the glue shrinkage problem which possibly occur are avoided.
In some preferred embodiments, the emulsifier is selected from at least one of fatty alcohol polyoxyethylene ether sodium sulfate, sulfosuccinate, branched dodecylbenzene sulfonic acid sodium salt, EO/PO polyether block copolymer, fatty alcohol ethoxylate, and aromatic alcohol ethoxylate.
In some preferred embodiments, the pH adjusting agent is a base.
Further preferably, the alkali substance is an inorganic alkali and/or an organic alkali.
In the present application, the organic base includes, but is not limited to, one or a mixture of several of ethanolamine, diethanolamine, triethanolamine and triethylamine.
In some preferred embodiments, the defoamer is selected from silicone defoamers, polyether modified polysiloxane defoamers, and combinations thereof.
Further preferably, the defoaming agent is a polyether defoaming agent.
In some preferred embodiments, the initiator is a free radical initiator.
Further preferably, the initiator is one or more of ammonium persulfate, sodium persulfate and potassium persulfate.
In some preferred embodiments, elimination of residual monomers is also carried out when the temperature is reduced to 75 ℃ after the synthesis incubation, i.e., the oxidizing agent and the reducing agent are added dropwise to the reaction kettle at the same time.
More preferably, the oxidizing agent used is hydrogen peroxide and the reducing agent is sodium formaldehyde sulfoxylate.
In some preferred embodiments, the raw materials for preparing the water-based advertising pressure-sensitive adhesive with excellent wettability comprise, by weight, 1-5 parts of styrene, 30-70 parts of acrylates, 0.1-1 part of an emulsifier, 0.1-1 part of a free radical initiator, 1-3 parts of a polymer initiator, 1-3 parts of a reducing agent, 0.1-1 part of a wetting agent, 0.1-1 part of an antifoaming agent, 0.5-2 parts of a pH regulator, 0.1-1 part of a thickening agent and 30-100 parts of water.
The second aspect of the invention provides a preparation method of a water-based advertisement sticker pressure-sensitive adhesive with excellent wetting performance, which comprises the following steps:
1) preparing a polymer emulsion;
2) and adding an auxiliary agent into the prepared polymer emulsion, stirring, adjusting the viscosity, filtering and discharging to obtain the polymer emulsion.
In some preferred embodiments, the preparation of the polymer emulsion according to step 1) comprises pre-emulsion preparation and initiator solution preparation.
In some preferred embodiments, the viscosity is adjusted to 50 to 5000cps in the step 2), and preferably, the viscosity is adjusted to 200 to 3000 cps.
In some preferred embodiments, the filtration of step 2) is performed through a 50-200 mesh filter cloth.
Has the beneficial effects that: the water-based advertisement sticker pressure-sensitive adhesive with excellent wetting property prepared by the invention has the following advantages:
1. the water-based advertisement sticker pressure-sensitive adhesive prepared by the invention has excellent wetting property and proper viscosity, can realize a coating mode of transfer coating when being used for a cold mounting film back adhesive, basically has no shrinkage cavity and shrinkage edge within 5s, meets the requirement of production transfer coating, and avoids the oil shrinkage phenomenon which possibly occurs in the use process;
2. the water-based advertisement sticker pressure-sensitive adhesive prepared by the invention is also suitable for transfer coating of release paper;
3. the water-based pressure-sensitive adhesive for the advertisement sticker prepared by the invention is safe, environment-friendly and non-toxic, has no harm to the coating process or the using process, and has extremely high application value.
Detailed Description
Examples
Example 1
A water-based advertisement sticker pressure-sensitive adhesive with excellent wettability is prepared from the following raw materials in parts by weight: 2 parts of styrene, 54.4 parts of acrylate, 0.6 part of emulsifier, 0.3 part of free radical initiator, 1.2 parts of polymer initiator, 1.1 part of reducing agent, 0.4 part of wetting agent, 0.1 part of defoaming agent, 1 part of pH regulator, 0.4 part of thickening agent and 42 parts of water.
The acrylic esters are butyl acrylate, hydroxyethyl acrylate and acrylic acid, and the weight parts of the acrylic esters are 52.75 parts, 0.8 part and 0.85 part respectively.
The emulsifier is sodium dodecyl benzene sulfonate;
the free radical initiator is ammonium persulfate;
the polymer initiator is tert-butyl hydrogen peroxide aqueous solution with the mass concentration of 1%;
the reducing agent is 0.55 mass percent of sodium formaldehyde sulfoxylate aqueous solution;
the wetting agent is alkyl polyoxyethylene ether and WET-100 wetting agent, and the weight ratio of the wetting agent to the wetting agent is 1: 1;
the alkyl polyoxyethylene ether, model OT-75, is purchased from Shanghai Hongdu industry Co., Ltd;
the WET-100 wetting agent is purchased from Shanghai Xue Junior chemical Co., Ltd
The defoaming agent is A10 defoaming agent which is purchased from Corning company;
the pH regulator is ammonia water;
the thickener is an alkali swelling thickener, with the model number BLJ-935, purchased from Shanghai Baolijia chemical industry Co., Ltd;
a preparation method of a water-based advertisement sticker pressure-sensitive adhesive with excellent wetting performance comprises the following steps:
1) preparation of polymer emulsion:
s1: weighing 18 parts of deionized water and 0.5 part of sodium dodecyl benzene sulfonate, adding into an emulsifying cylinder, stirring for 5 minutes, adding styrene, butyl acrylate, hydroxyethyl acrylate and acrylic acid while stirring, and quickly stirring for 30 minutes to prepare a pre-emulsion;
s2: weighing ammonium persulfate, and dissolving with 4g of deionized water to prepare an initiator solution;
2) and adding an auxiliary agent into the prepared polymer emulsion, stirring, adjusting the viscosity, filtering and discharging to obtain the polymer emulsion.
The specific operation of the step 2) is as follows:
s3: weighing the rest deionized water, adding 0.1g of sodium dodecyl benzene sulfonate into a reaction kettle, stirring and heating to 84 ℃, adding 2% of pre-emulsion and 60% of initiator solution, reacting for 10 minutes, beginning to dropwise add the rest pre-emulsion and the initiator solution, wherein the dropwise adding time is 3.5 hours, the reaction temperature is 85 ℃, and keeping the temperature for 1 hour after the addition;
s4: and (4) cooling the step S3 to 75 ℃, simultaneously dropwise adding the tert-butyl hydrogen peroxide aqueous solution and the rongalite aqueous solution, reacting for 30min, cooling to 50 ℃, adding a wetting agent and an antifoaming agent, stirring uniformly, adding a pH regulator to regulate the pH to 8, finally adding a thickening agent to regulate the viscosity to 1000mPa & S, stabilizing, filtering by using a 100-mesh filter cloth, and discharging to obtain the product.
Example 2
A water-based advertisement sticker pressure-sensitive adhesive with excellent wettability is prepared from the following raw materials in parts by weight: 3.5 parts of styrene, 53.35 parts of acrylate, 0.59 part of emulsifier, 0.29 part of free radical initiator, 1.2 parts of polymer initiator, 1.1 part of reducing agent, 0.4 part of wetting agent, 0.1 part of defoaming agent, 1 part of pH regulator, 0.4 part of thickening agent and 39.5 parts of water.
The acrylic esters comprise 51.85 parts of butyl acrylate, 0.6 part of hydroxyethyl acrylate, 0.8 part of acrylic acid and 0.1 part of acrylamide in parts by weight.
The emulsifier is sodium dodecyl benzene sulfonate;
the free radical initiator is ammonium persulfate;
the polymer initiator is tert-butyl hydrogen peroxide aqueous solution with the mass concentration of 1%;
the reducing agent is VC aqueous solution with the mass concentration of 0.55%;
the wetting agent is alkyl polyoxyethylene ether 1;
the alkyl polyoxyethylene ether, model OT-75, is purchased from Shanghai Hongdu industry Co., Ltd;
the defoaming agent is A10 defoaming agent which is purchased from Corning company;
the pH regulator is ammonia water;
the thickener is an alkali swelling thickener, with the model number BLJ-935, purchased from Shanghai Baolijia chemical industry Co., Ltd;
a preparation method of a water-based advertisement sticker pressure-sensitive adhesive with excellent wetting performance comprises the following steps:
1) preparation of polymer emulsion:
s1: weighing 16.5 parts of deionized water and 0.5 part of sodium dodecyl benzene sulfonate, adding into an emulsifying cylinder, stirring for 5 minutes, adding styrene, butyl acrylate, hydroxyethyl acrylate, acrylic acid and acrylamide while stirring, and quickly stirring for 30 minutes to prepare a pre-emulsion;
s2: weighing ammonium persulfate, and dissolving with 4g of deionized water to prepare an initiator solution;
2) and adding an auxiliary agent into the prepared polymer emulsion, stirring, adjusting the viscosity, filtering and discharging to obtain the polymer emulsion.
The specific operation of the step 2) is as follows:
s3: weighing the residual deionized water, adding 0.09g of sodium dodecyl benzene sulfonate into a reaction kettle, stirring and heating to 84 ℃, adding 3% of pre-emulsion and 60% of initiator solution, reacting for 10 minutes, beginning to dropwise add the residual pre-emulsion and the initiator solution, wherein the dropwise adding time is 4 hours, the reaction temperature is 85 ℃, and keeping the temperature for 1 hour after the addition;
s4: and (3) cooling the temperature of the step S3 to 75 ℃, simultaneously dropwise adding the tert-butyl hydrogen peroxide aqueous solution and the VC aqueous solution, cooling to 50 ℃ after reacting for 30min, adding a wetting agent and a defoaming agent, uniformly stirring, adding a pH regulator to regulate the pH to 8, finally adding a thickening agent to regulate the viscosity to 1200mPa & S, stabilizing, filtering with 100-mesh filter cloth, and discharging to obtain the product.
Example 3
A water-based advertisement sticker pressure-sensitive adhesive with excellent wettability is prepared from the following raw materials in parts by weight: 54.8 parts of acrylate, 0.5 part of emulsifier, 0.3 part of free radical initiator, 1.2 parts of polymer initiator, 1.1 parts of reducing agent, 0.4 part of wetting agent, 0.1 part of defoaming agent, 0.8 part of pH regulator, 0.5 part of thickening agent and 42 parts of water.
The acrylic esters are methyl methacrylate, butyl acrylate, hydroxyethyl acrylate and acrylic acid, and the weight parts of the acrylic esters are 3 parts, 50.5 parts, 0.8 part and 0.5 part respectively.
The emulsifier is fatty alcohol polyoxyethylene ether sodium sulfate;
the free radical initiator is sodium persulfate;
the polymer initiator is tert-butyl hydrogen peroxide aqueous solution with the mass concentration of 1%;
the reducing agent is 0.55 mass percent of sodium formaldehyde sulfoxylate aqueous solution;
the wetting agent is alkyl polyoxyethylene ether and WET-100 wetting agent, and the weight ratio of the wetting agent is 3: 1;
the alkyl polyoxyethylene ether, model OT-75, is purchased from Shanghai Hongdu industry Co., Ltd;
the WET-100 wetting agent is purchased from Shanghai Xue Junior chemical Co., Ltd,
the defoaming agent is A10 defoaming agent which is purchased from Corning company;
the pH regulator is ammonia water;
the thickening agent is carboxymethyl cellulose;
a method for preparing a water-based advertisement sticker pressure-sensitive adhesive having excellent wetting properties is described in example 1.
Example 4
A water-based advertisement sticker pressure-sensitive adhesive with excellent wettability is prepared from the following raw materials in parts by weight: 55.5 parts of acrylate, 0.65 part of emulsifier, 0.28 part of free radical initiator, 0.5 part of wetting agent, 0.1 part of defoaming agent, 1.1 part of pH regulator, 0.5 part of thickening agent and 41 parts of water.
The acrylic esters are methyl methacrylate, butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate and acrylic acid, and the weight parts of the acrylic esters are respectively 3 parts, 48.5 parts, 2.5 parts, 0.7 part and 0.8 part.
The emulsifier is sodium dodecyl benzene sulfonate and fatty alcohol ethoxylate;
the fatty alcohol ethoxylate is AEO-9, and is purchased from China Petroleum Gill
The free radical initiator is sodium persulfate;
the wetting agent is OT-70 wetting agent and WET-100 wetting agent, and the weight ratio is 2: 3;
the OT-70 wetting agent, commercially available; the WET-100 wetting agent is purchased from Shanghai Xue Junior chemical Co., Ltd,
the defoaming agent is A10 defoaming agent which is purchased from Corning company;
the pH regulator is ammonia water;
the thickener is an alkali swelling thickener, with the model number BLJ-935, purchased from Shanghai Baolijia chemical industry Co., Ltd;
a preparation method of a water-based advertisement sticker pressure-sensitive adhesive with excellent wetting performance comprises the following steps:
1) preparation of polymer emulsion:
s1: weighing 16 parts of deionized water, 0.4 part of sodium dodecyl benzene sulfonate and 0.1 part of fatty alcohol ethoxylate, adding the deionized water, the sodium dodecyl benzene sulfonate and the fatty alcohol ethoxylate into an emulsifying cylinder, stirring for 5 minutes, adding methyl methacrylate, butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate and acrylic acid while stirring, and quickly stirring for 30 minutes to prepare a pre-emulsion;
s2: weighing ammonium persulfate, and dissolving with 4g of deionized water to prepare an initiator solution;
2) and adding an auxiliary agent into the prepared polymer emulsion, stirring, adjusting the viscosity, filtering and discharging to obtain the polymer emulsion.
The specific operation of the step 2) is as follows:
s3: weighing the residual deionized water, adding 0.15g of sodium dodecyl benzene sulfonate into a reaction kettle, stirring and heating to 84 ℃, adding 2.5% of pre-emulsion and 65% of initiator solution, reacting for 10 minutes, beginning to dropwise add the residual pre-emulsion and the initiator solution for 4 hours, reacting at 85 ℃, and keeping the temperature for 1.5 hours after the addition;
s4: and (4) cooling the temperature of the step S3 to 60 ℃, adding a wetting agent and a defoaming agent, uniformly stirring, cooling to 50 ℃, adding a pH regulator to regulate the pH to 8, finally adding a thickening agent to regulate the viscosity to 1400mPa & S, stabilizing, filtering with 100-mesh filter cloth, and discharging to obtain the water-based paint.
Example 5
A water-based advertisement sticker pressure-sensitive adhesive with excellent wettability is prepared from the following raw materials in parts by weight: 3.5 parts of vinyl acetate, 51.45 parts of acrylic esters, 0.9 part of emulsifier, 0.32 part of free radical initiator, 0.3 part of wetting agent, 0.1 part of defoaming agent, 1 part of pH regulator, 0.2 part of thickening agent and 42 parts of water.
The acrylic esters comprise 47.5 parts of butyl acrylate, 2.5 parts of isooctyl acrylate, 0.7 part of hydroxyethyl acrylate and 0.75 part of methacrylic acid in parts by weight.
The emulsifier is sodium dodecyl diphenyl ether sulfonate;
the free radical initiator is ammonium persulfate;
the wetting agent is BYK-310 which is purchased from Bick company;
the defoaming agent is A10 defoaming agent which is purchased from Corning company;
the pH regulator is ammonia water;
the thickening agent is an associated thickening agent, RM-8W thickening agent and purchased from Pasteur USA;
a preparation method of a water-based advertisement sticker pressure-sensitive adhesive with excellent wetting performance comprises the following steps:
1) preparation of polymer emulsion:
s1: weighing 17 parts of deionized water and 0.7 part of sodium dodecyl diphenyl ether sulfonate, adding into an emulsifying cylinder, stirring for 5 minutes, adding vinyl acetate, butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate and methacrylic acid while stirring, and quickly stirring for 30 minutes to prepare a pre-emulsion;
s2: weighing ammonium persulfate, and dissolving with 4g of deionized water to prepare an initiator solution;
2) and adding an auxiliary agent into the prepared polymer emulsion, stirring, adjusting the viscosity, filtering and discharging to obtain the polymer emulsion.
The specific operation of the step 2) is as follows:
s3: weighing the residual deionized water, adding 0.15g of sodium dodecyl benzene sulfonate into a reaction kettle, stirring and heating to 84 ℃, adding 2.5% of pre-emulsion and 65% of initiator solution, reacting for 10 minutes, beginning to dropwise add the residual pre-emulsion and the initiator solution for 3.5 hours, reacting at 85 ℃, and keeping the temperature for 1.5 hours after the addition;
s4: and (4) cooling the temperature of the step S3 to 60 ℃, adding a wetting agent and a defoaming agent, uniformly stirring, cooling to 50 ℃, adding a pH regulator to regulate the pH to 8, finally adding a thickening agent to regulate the viscosity to 900mPa & S, stabilizing, filtering with 100-mesh filter cloth, and discharging to obtain the water-based paint.
Example 6
A water-based advertisement sticker pressure-sensitive adhesive with excellent wettability is prepared from the following raw materials in parts by weight: 3 parts of methyl vinyl acetate, 51.45 parts of acrylic esters, 0.75 part of emulsifier, 0.35 part of free radical initiator, 0.4 part of wetting agent, 0.1 part of defoaming agent, 1.1 part of pH regulator, 0.5 part of thickening agent and 44 parts of water.
The acrylic esters are butyl acrylate, ethyl acrylate, hydroxyethyl acrylate and methacrylic acid, and the weight parts of the acrylic esters are 48.5 parts, 2.5 parts, 0.6 part and 0.6 part respectively.
The emulsifier is sodium dodecyl diphenyl ether sulfonate;
the free radical initiator is sodium persulfate;
the wetting agent is OT-70 wetting agent and BYK-310, and the weight ratio of the OT-70 wetting agent to the BYK-310 is 1: 3;
OT-70 wetting agent, available from;
the defoaming agent is A10 defoaming agent which is purchased from Corning company;
the pH regulator is ammonia water;
the thickener is an alkali swelling thickener, with the model number BLJ-935, purchased from Shanghai Baolijia chemical industry Co., Ltd;
a preparation method of a water-based advertisement sticker pressure-sensitive adhesive with excellent wetting performance comprises the following steps:
1) preparation of polymer emulsion:
s1: weighing 20 parts of deionized water and 0.6 part of sodium dodecyl diphenyl ether sulfonate, adding into an emulsifying cylinder, stirring for 5 minutes, adding methyl vinyl acetate, butyl acrylate, ethyl acrylate, hydroxyethyl acrylate and methacrylic acid while stirring, and quickly stirring for 40 minutes to prepare a pre-emulsion;
s2: weighing ammonium persulfate, and dissolving the ammonium persulfate by using 5g of deionized water to prepare an initiator solution;
2) and adding an auxiliary agent into the prepared polymer emulsion, stirring, adjusting the viscosity, filtering and discharging to obtain the polymer emulsion.
The specific operation of the step 2) is as follows:
s3: weighing the residual deionized water, adding 0.15g of sodium dodecyl benzene sulfonate into a reaction kettle, stirring and heating to 84 ℃, adding 3% of pre-emulsion and 72% of initiator solution, reacting for 10 minutes, beginning to dropwise add the residual pre-emulsion and the initiator solution for 3.5 hours, reacting at 85 ℃, and keeping the temperature for 1.5 hours after the addition;
s4: and (4) cooling the temperature of the step S3 to 60 ℃, adding a wetting agent and a defoaming agent, uniformly stirring, cooling to 50 ℃, adding a pH regulator to regulate the pH to 8, finally adding a thickening agent to regulate the viscosity to 1300mPa & S, stabilizing, filtering with 100-mesh filter cloth, and discharging to obtain the water-based paint.
And (3) performance testing:
A. emulsion wetting ability test: uniformly coating the glue on the silicone oil surface of the transfer film by using a 25-wire bar and a small coating machine, observing the change for 1, 3, 5, 7 and 10 seconds, and recording the performance test results in the following table 1;
B. testing of pressure sensitive Properties of the emulsions:
20min peel force test: testing is carried out by a computer type testing machine according to GB/T2792-1998.
And (3) testing initial adhesion: and testing according to GB/T4852-2002, and using a ball number to represent the initial adhesion.
And (3) permanent adhesion testing: the test was carried out according to GB/T4851-1998, expressed as the drop time.
And the above performance test results are recorded in table 2 below;
table 1:
the performance test results show that: under the condition that the wetting agent and the thickening agent are matched, the prepared pressure-sensitive adhesive has good wetting performance, basically has no shrinkage cavity and shrinkage edge within 5s, meets the requirement of production transfer coating, and is also suitable for transfer coating of release paper.
Table 2:
the performance test results show that the pressure-sensitive adhesive prepared by the method has better performance, can completely meet the application requirement of cold film mounting, and has better applicability under the mediation of the wetting system, no matter styrene-acrylic, pure acrylic and vinyl acetate acrylic emulsions, the requirement of transfer coating can be met.
Claims (10)
1. The water-based pressure-sensitive adhesive for the advertisement sticker with excellent wettability is characterized in that the preparation raw materials comprise polymer emulsion and an auxiliary agent;
the polymer emulsion comprises at least one of styrene-acrylate copolymer emulsion, pure acrylic emulsion and vinyl acetate-acrylic emulsion.
2. The water-based advertisement sticker pressure-sensitive adhesive with excellent wettability of claim 1, wherein the weight of the auxiliary agent is 0.01-2% of the total weight of the preparation raw materials; preferably, the content of the active ingredients is 0.1-1% of the total weight of the preparation raw materials.
3. The aqueous advertisement poster pressure sensitive adhesive with excellent wetting property according to claim 1 or 2, wherein the auxiliary agent comprises at least one of a thickening agent, a wetting agent, a defoaming agent, an emulsifying agent, an initiator, and a pH adjusting agent.
4. The aqueous advertisement poster pressure sensitive adhesive with excellent wetting property of claim 3, wherein the thickener is a thixotropic thickener.
5. The aqueous poster pressure-sensitive adhesive with excellent wetting property of claim 4, wherein the thixotropic thickener is at least one selected from the group consisting of alkali swelling thickener, associative thickener, cellulose thickener.
6. The water-based advertisement sticker pressure-sensitive adhesive with excellent wettability according to claim 3 or 4, wherein the weight of the thickener is 0.01-2% of the total weight of the preparation raw materials; preferably, the content is 0.1-0.8% of the total weight of the preparation raw materials.
7. The waterborne advertisement pasting pressure-sensitive adhesive with excellent wetting property of claim 3, wherein the emulsifier is selected from at least one of fatty alcohol polyoxyethylene ether sulfate sodium salt, sulfosuccinate, branched dodecylbenzene sulfonic acid sodium salt, EO/PO polyether block copolymer, fatty alcohol ethoxylate and aromatic alcohol ethoxylate.
8. A method for preparing the water-based poster pressure-sensitive adhesive with excellent wetting property according to any one of claims 3 to 7, characterized by comprising the following steps:
1) preparing a polymer emulsion;
2) and adding an auxiliary agent into the prepared polymer emulsion, stirring, adjusting the viscosity, filtering and discharging to obtain the polymer emulsion.
9. The method for preparing the waterborne advertisement sticker pressure-sensitive adhesive with excellent wetting property according to claim 8, wherein the viscosity is adjusted to 50 to 5000cps, preferably 200 to 3000cps in the step 2).
10. The method for preparing the water-based poster pressure-sensitive adhesive with excellent wetting property of claim 8, wherein the filtration of the step 2) is performed by a 50-200 mesh filter cloth.
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| CN202110996571.5A CN115124950A (en) | 2021-08-27 | 2021-08-27 | Water-based advertisement sticker pressure-sensitive adhesive with excellent wetting property and preparation method thereof |
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| CN202110996571.5A CN115124950A (en) | 2021-08-27 | 2021-08-27 | Water-based advertisement sticker pressure-sensitive adhesive with excellent wetting property and preparation method thereof |
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|---|---|---|---|---|
| CN103342784A (en) * | 2013-06-17 | 2013-10-09 | 华南理工大学 | Frankincense-modified acrylate emulsion and its preparation method and use |
| CN110041859A (en) * | 2019-03-20 | 2019-07-23 | 广东银洋环保新材料有限公司 | Without base stock CPP cold lamination film water-borne pressure sensitive adhesive and preparation method thereof and cold lamination film |
| US20190359843A1 (en) * | 2016-12-29 | 2019-11-28 | Dow Global Technologies Llc | Aqueous polymer dispersion and aqueous coating composition comprising the same |
| CN113061408A (en) * | 2020-01-02 | 2021-07-02 | 万华化学集团股份有限公司 | Water-based removable pressure-sensitive adhesive, preparation method thereof and repeatedly removable film label |
-
2021
- 2021-08-27 CN CN202110996571.5A patent/CN115124950A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342784A (en) * | 2013-06-17 | 2013-10-09 | 华南理工大学 | Frankincense-modified acrylate emulsion and its preparation method and use |
| US20190359843A1 (en) * | 2016-12-29 | 2019-11-28 | Dow Global Technologies Llc | Aqueous polymer dispersion and aqueous coating composition comprising the same |
| CN110041859A (en) * | 2019-03-20 | 2019-07-23 | 广东银洋环保新材料有限公司 | Without base stock CPP cold lamination film water-borne pressure sensitive adhesive and preparation method thereof and cold lamination film |
| CN113061408A (en) * | 2020-01-02 | 2021-07-02 | 万华化学集团股份有限公司 | Water-based removable pressure-sensitive adhesive, preparation method thereof and repeatedly removable film label |
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