CN116904149A - Water-based pressure-sensitive adhesive for low-tackifying protective film and preparation method thereof - Google Patents
Water-based pressure-sensitive adhesive for low-tackifying protective film and preparation method thereof Download PDFInfo
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- CN116904149A CN116904149A CN202311167859.7A CN202311167859A CN116904149A CN 116904149 A CN116904149 A CN 116904149A CN 202311167859 A CN202311167859 A CN 202311167859A CN 116904149 A CN116904149 A CN 116904149A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000004820 Pressure-sensitive adhesive Substances 0.000 title claims abstract description 36
- 230000001681 protective effect Effects 0.000 title claims abstract description 28
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000000839 emulsion Substances 0.000 claims abstract description 56
- 239000000178 monomer Substances 0.000 claims abstract description 39
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 239000003999 initiator Substances 0.000 claims abstract description 12
- 229920000642 polymer Polymers 0.000 claims abstract description 12
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 10
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 4
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical group [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 16
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 8
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- RNMDNPCBIKJCQP-UHFFFAOYSA-N 5-nonyl-7-oxabicyclo[4.1.0]hepta-1,3,5-trien-2-ol Chemical compound C(CCCCCCCC)C1=C2C(=C(C=C1)O)O2 RNMDNPCBIKJCQP-UHFFFAOYSA-N 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 5
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical group CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 2
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical compound OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- 150000008051 alkyl sulfates Chemical class 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 239000011258 core-shell material Substances 0.000 abstract description 7
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- 238000004945 emulsification Methods 0.000 abstract description 5
- 239000002245 particle Substances 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 238000003786 synthesis reaction Methods 0.000 abstract description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- HQVFKSDWNYVAQD-UHFFFAOYSA-N n-hydroxyprop-2-enamide Chemical compound ONC(=O)C=C HQVFKSDWNYVAQD-UHFFFAOYSA-N 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- YFQOMWCXASCIMB-UHFFFAOYSA-N nonylperoxybenzene Chemical compound CCCCCCCCCOOC1=CC=CC=C1 YFQOMWCXASCIMB-UHFFFAOYSA-N 0.000 description 2
- GGHPAKFFUZUEKL-UHFFFAOYSA-M sodium;hexadecyl sulfate Chemical compound [Na+].CCCCCCCCCCCCCCCCOS([O-])(=O)=O GGHPAKFFUZUEKL-UHFFFAOYSA-M 0.000 description 2
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 description 1
- -1 alkyl sodium sulfate Chemical compound 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
Classifications
-
- 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
- C09J151/003—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 by reactions only involving unsaturated carbon-to-carbon bonds
-
- 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
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Polymerisation Methods In General (AREA)
Abstract
The invention discloses a water-based pressure-sensitive adhesive for a low-tackifying protective film and a preparation method thereof, wherein the water-based pressure-sensitive adhesive comprises 1.7-1.9 parts of emulsifying agent, 0.8-1.2 parts of initiator, 150-170 parts of soft monomer and hard monomer: 40-60 parts of functional monomer: 11-16 parts of water 260-300 parts of the adhesive, and the preparation method comprises the steps of preparing polymer pre-emulsion A, preparing polymer pre-emulsion B, preparing seed emulsion, preparing polyacrylate pressure-sensitive adhesive emulsion and the like; the invention has the advantages that: the monomers with different compositions are emulsified respectively by adopting a twice pre-emulsification mode, and different monomer compositions of the colloidal particle core shell can be endowed during synthesis, so that the colloidal particle core shell has different characteristics, and the protective film produced by emulsion coating synthesized by the method has the characteristic of small viscosity increase.
Description
Technical Field
The invention relates to a pressure-sensitive adhesive, in particular to a water-based pressure-sensitive adhesive for a low-tackifying protective film and a preparation method thereof, belonging to the field of water-based pressure-sensitive adhesives.
Background
The pressure-sensitive adhesive product is widely applied to various industries such as packaging, electrical and electronic appliances, buildings, medical and health products, automobiles, household articles for daily use and the like, and plays various roles in binding, protecting, sealing, insulating, fixing and the like. The strippable pressure-sensitive adhesive film has good strippable performance, and no residual adhesive is left on the substrate material during the strippable, so that the surface performance of the substrate material is not damaged, and the strippable pressure-sensitive adhesive film is increasingly valued in the fields of automobiles, household appliances, furniture, temporary protective films for surfaces of some high-finish materials and the like, and the demand and application range of the strippable pressure-sensitive adhesive film are expanded and the strippable pressure-sensitive adhesive film has a continuously rising trend.
The viscosity of the aqueous pressure-sensitive adhesive prepared by the prior art is increased rapidly along with the increase of the standing time after the coated protected object is coated, the film is difficult to be removed by a final customer, and the temperature is particularly high in summer.
Disclosure of Invention
In order to solve the problems, the invention designs the water-based pressure-sensitive adhesive for the low-tackifying protective film and the preparation method thereof, and the monomers with different compositions are emulsified respectively in a twice pre-emulsification mode, so that different monomer compositions of the colloidal particle core shell can be endowed during synthesis, and the protective film produced by emulsion coating synthesized by the method has the characteristic of small viscosity increase.
The technical scheme of the invention is as follows:
the water-based pressure-sensitive adhesive for the low-tackifying protective film is prepared from the following raw materials in parts by weight:
emulsifying agent: 1.7-1.9 parts;
and (3) an initiator: 0.8-1.2 parts;
soft monomer: 150-170 parts;
hard monomer: 40-60 parts
Functional monomer: 11-16 parts;
water: 260-300 parts.
Wherein the emulsifier is a mixture of nonylphenol ether and C12-C16 alkyl sodium sulfate in any proportion, so that the emulsifier is a mixture of nonionic and anionic, and the emulsion stability is good.
The initiator is ammonium persulfate and is used for initiating the polymerization of monomers.
The soft monomer is butyl acrylate, so that the flexibility can be improved, the film formation can be promoted, and the soft monomer is soft.
The hard monomer is one or a mixture of methyl methacrylate and styrene in any proportion, can improve hardness and cohesive strength, and is a hard monomer.
The functional monomer is one or a mixture of more than two of acrylic acid, hydroxyethyl methacrylate, N-methylolacrylamide and acrylamide in any proportion, can introduce functional groups or crosslinking points, improves the adhesive force, and is a crosslinking monomer or a functional monomer.
The water is RO water.
The preparation method of the water-based pressure-sensitive adhesive for the low-tackifying protective film comprises the following steps of:
(1) Preparation of a polymer pre-emulsion a: adding 90-110 parts of water, 1.5-1.7 parts of an emulsifying agent, 0.6-0.8 part of an initiating agent, 25-35 parts of a hard monomer, 150-170 parts of a soft monomer and 11-16 parts of a functional monomer into a three-neck flask, and dispersing for 20-30min at 300-400r/min to form a stable pre-emulsion A;
(2) Preparation of a polymer pre-emulsion B: adding 10-11 parts of water, 0.1-0.3 part of emulsifier, 0.1-0.3 part of initiator and 15-25 parts of hard monomer into a three-neck flask, and dispersing for 20-30min at 300-400r/min to form stable pre-emulsion B;
(3) Preparing seed emulsion: adding 150-169 parts of water into a four-neck flask, heating to 70 ℃, adding 5-7% of the total amount of the pre-emulsion A obtained in the step (1), adding a mixed solution of the residual initiator and the residual water when the temperature is increased to 75 ℃, and continuously heating to about 85 ℃ for reaction for 20-30min;
(4) Preparing polyacrylate pressure-sensitive adhesive emulsion: slowly dripping the residual pre-emulsion A in the step (1) for 2.5-3.5 h; after the dripping is finished, continuing to react for 30-40min; and (3) dropwise adding the pre-emulsion B prepared in the step (2), directly preserving heat for 1.5-2 hours at 85-90 ℃ after the dropwise adding is completed for 30-40min, cooling to 40-50 ℃, adding ammonia water to adjust pH=7, stirring for 20-30min, and filtering and discharging. Ammonia water is added to adjust the pH of the emulsion to be neutral, so that the storage stability of the emulsion is enhanced, and the subsequent coating application is facilitated.
The invention adopts a twice pre-emulsification dripping mode to prepare the emulsion with a special core-shell structure, and the twice pre-emulsification can respectively pre-emulsify monomers with different compositions for subsequent synthesis. The special core-shell structure prepared by the invention is characterized in that the monomer compositions of the core and the shell are different, the different monomer compositions endow different characteristics, and the multi-glue of the shell layer soft monomer is good in initial adhesion and high in softness; the shell layer hard monomer multi-glue is small in initial adhesion, but high in hardness.
The invention has the advantages that: the monomers with different compositions are emulsified respectively by adopting a twice pre-emulsification mode, and different monomer compositions of the colloidal particle core shell can be endowed during synthesis, so that the colloidal particle core shell has different characteristics, and the protective film produced by emulsion coating synthesized by the method has the characteristic of small viscosity increase.
The invention will be further illustrated with reference to specific examples.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for the purpose of illustration and explanation only and is not intended to limit the present invention.
The parts referred to in the present invention are all parts by weight.
Example 1
The preparation method of the water-based pressure-sensitive adhesive for the low-tackifying protective film comprises the following steps:
(1) Preparation of a polymer pre-emulsion a: 90g of water, 1.5g of a mixture of nonylphenol ether NP-10 and sodium dodecyl sulfate K12 in a mass ratio of 1:1, 0.6g of ammonium persulfate, 25g of methyl methacrylate, 150g of butyl acrylate, 7g of hydroxyethyl methacrylate, 1g N-hydroxyacrylamide and 3g of acrylic acid are added into a three-neck flask, and dispersed for 20min at 300r/min to form a stable pre-emulsion A;
(2) Preparation of a polymer pre-emulsion B: 10g of water, 0.1g of a mixture of nonylphenol ether NP-10 and sodium dodecyl sulfate K12 in a mass ratio of 1:1, 0.1g of ammonium persulfate and 15g of methyl methacrylate are added into a three-neck flask to be dispersed for 20min at 300r/min, so as to form a stable pre-emulsion B;
(3) Preparing seed emulsion: 150g of water is added into a four-neck flask, 13.9g of the pre-emulsion A obtained in the step (1) is added when the temperature is raised to 70 ℃, and a mixed solution of 0.1g of the residual initiator and 10g of the residual water is added when the temperature is raised to 75 ℃, and the temperature is raised to about 85 ℃ continuously for reaction for 20min;
(4) Preparing polyacrylate pressure-sensitive adhesive emulsion: slowly dripping the residual pre-emulsion A in the step (1) for 2.5 hours; after the dripping is finished, continuing to react for 30min; and (3) dropwise adding the pre-emulsion B prepared in the step (2), directly preserving heat for 1.5h at 85 ℃ after the dropwise adding is completed within 30min, cooling to 40 ℃, adding ammonia water to adjust pH=7, stirring for 20min, and filtering and discharging.
Example two
The preparation method of the water-based pressure-sensitive adhesive for the low-tackifying protective film comprises the following steps:
(1) Preparation of a polymer pre-emulsion a: 110g of water, 1.7g of a mixture of nonylphenoxy ether NP-10 and sodium hexadecyl sulfate in a mass ratio of 1:1, 0.8g of ammonium persulfate, 35g of methyl methacrylate, 170g of butyl acrylate, 9g of hydroxyethyl methacrylate, 2g of N-hydroxyacrylamide and 5g of acrylic acid are added into a three-neck flask and dispersed at 400r/min for 30min to form a stable pre-emulsion A;
(2) Preparation of a polymer pre-emulsion B: adding 11g of water, 0.3g of a mixture of nonylphenoxy ether NP-10 and hexadecyl sodium sulfate in a mass ratio of 1:1, 0.3g of ammonium persulfate and 25g of methyl methacrylate into a three-neck flask, and dispersing at 400r/min for 30min to form a stable pre-emulsion B;
(3) Preparing seed emulsion: adding 169g of water into a four-neck flask, heating to 70 ℃, adding 23.35g of the pre-emulsion A obtained in the step (1), adding a mixed solution of 0.1g of the residual initiator and 10g of the residual water when the temperature is increased to 75 ℃, and continuously heating to about 85 ℃ for reaction for 30min;
(4) Preparing polyacrylate pressure-sensitive adhesive emulsion: slowly dripping the residual pre-emulsion A in the step (1) for 3.5 hours; after the dripping is finished, continuing to react for 30min; and (3) dropwise adding the pre-emulsion B prepared in the step (2), directly preserving heat for 2 hours at 85 ℃ after the dropwise adding is completed within 40 minutes, cooling to 40 ℃, adding ammonia water to adjust pH=7, stirring for 20 minutes, and filtering and discharging.
Example III
The preparation method of the water-based pressure-sensitive adhesive for the low-tackifying protective film comprises the following steps:
(1) Preparation of a polymer pre-emulsion a: 100g of water, 1.6g of a mixture of nonylphenol ether NP-10 and sodium dodecyl sulfate K12 in a mass ratio of 1:1, 0.70g of ammonium persulfate, 30g of styrene, 160g of butyl acrylate, 8g of hydroxyethyl methacrylate, 1.5g of N-hydroxyacrylamide and 4g of acrylic acid are added into a three-necked flask and dispersed for 30min at 350r/min to form a stable pre-emulsion A;
(2) Preparation of a polymer pre-emulsion B: 10.5g of water, 0.2g of a mixture of nonylphenol ether NP-10 and sodium dodecyl sulfate K12 in a mass ratio of 1:1, 0.2g of ammonium persulfate and 20g of styrene are added into a three-neck flask to be dispersed for 30min at 350r/min, so as to form stable pre-emulsion B;
(3) Preparing seed emulsion: adding 165.5g of water into a four-neck flask, heating to 70 ℃, adding 18.2g of the pre-emulsion A obtained in the step (1), adding a mixed solution of 0.1g of the residual initiator and 9g of the residual water when the temperature is increased to 75 ℃, and continuously heating to about 85 ℃ for reaction for 30min;
(4) Preparing polyacrylate pressure-sensitive adhesive emulsion: slowly dripping the residual pre-emulsion A in the step (1) for 3.5 hours; after the dripping is finished, continuing to react for 30min; and (3) dropwise adding the pre-emulsion B prepared in the step (2), directly preserving heat for 2 hours at 85 ℃ after the dropwise adding is completed within 35min, cooling to 40 ℃, adding ammonia water to adjust pH=7, stirring for 20min, and filtering and discharging.
The pressure-sensitive adhesive prepared in the above three examples was added with 5% aziridine crosslinking agent SC-100, 10g of wet adhesive was coated with 47 μm transparent PE substrate, and the protective film was prepared after baking at 70℃for 5 minutes, and mirror stainless steel plates were attached to each for the experiment of the viscosity change with time.
The viscosity of the aqueous polyacrylate pressure-sensitive adhesive coated protective film (SD-5003 summer) prepared in the prior art is rapidly increased along with the increase of time, and the increase range is generally more than 100%.
The tackifying amplitude of the pressure-sensitive adhesive coating protective film prepared by the invention is 30-70% under the same environment of the protective film.
From the above results, it can be seen that the protective film produced by the present invention has small viscosity increase with the increase of the application time, has a better protective effect, and improves the quality of the product.
The raw materials used in the invention are all common raw materials in the production in the field, can be obtained from the market, and have no influence on the production result; the various devices used in the present invention are all conventional devices used in the art production process, and the operations, parameters, etc. of each device are performed according to conventional operations, without any particular limitation.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The water-based pressure-sensitive adhesive for the low-tackifying protective film is characterized by being prepared from the following raw materials in parts by weight:
emulsifying agent: 1.7-1.9 parts;
and (3) an initiator: 0.8-1.2 parts;
soft monomer: 150-170 parts;
hard monomer: 40-60 parts
Functional monomer: 11-16 parts;
water: 260-300 parts.
2. The aqueous pressure-sensitive adhesive for a low adhesion-promoting protective film according to claim 1, wherein: the emulsifier is a mixture of nonylphenol ether and sodium C12-C16 alkyl sulfate.
3. The aqueous pressure-sensitive adhesive for a low adhesion-promoting protective film according to claim 1, wherein: the initiator is ammonium persulfate.
4. The aqueous pressure-sensitive adhesive for a low adhesion-promoting protective film according to claim 1, wherein: the soft monomer is butyl acrylate.
5. The aqueous pressure-sensitive adhesive for a low adhesion-promoting protective film according to claim 1, wherein: the hard monomer is one or two of methyl methacrylate and styrene.
6. The aqueous pressure-sensitive adhesive for a low adhesion-promoting protective film according to claim 1, wherein: the functional monomer is one or more than two of acrylic acid, hydroxyethyl methacrylate, N-methylolacrylamide and acrylamide.
7. The aqueous pressure-sensitive adhesive for a low adhesion-promoting protective film according to claim 1, wherein: the water is RO water.
8. The method for preparing the aqueous pressure-sensitive adhesive for a low adhesion protective film according to any one of claims 1 to 7, comprising the steps of:
(1) Preparation of a polymer pre-emulsion a: adding 90-110 parts of water, 1.5-1.7 parts of an emulsifying agent, 0.6-0.8 part of an initiating agent, 25-35 parts of a hard monomer, 150-170 parts of a soft monomer and 11-16 parts of a functional monomer into a three-neck flask, and dispersing for 20-30min at 300-400r/min to form a stable pre-emulsion A;
(2) Preparation of a polymer pre-emulsion B: adding 10-11 parts of water, 0.1-0.3 part of emulsifier, 0.1-0.3 part of initiator and 15-25 parts of hard monomer into a three-neck flask, and dispersing for 20-30min at 300-400r/min to form stable pre-emulsion B;
(3) Preparing seed emulsion: adding 150-169 parts of water into a four-neck flask, heating to 70 ℃, adding 5-7% of the total amount of the pre-emulsion A obtained in the step (1), adding a mixed solution of the residual initiator and the residual water when the temperature is increased to 75 ℃, and continuously heating to about 85 ℃ for reaction for 20-30min;
(4) Preparing polyacrylate pressure-sensitive adhesive emulsion: slowly dripping the residual pre-emulsion A in the step (1) for 2.5-3.5 h; after the dripping is finished, continuing to react for 30-40min; and (3) dropwise adding the pre-emulsion B prepared in the step (2), directly preserving heat at 85-90 ℃ for 1.5-2h after the dropwise adding is completed for 30-40min, cooling to 40-50 ℃, adding ammonia water to adjust pH to be 7, stirring for 20-30min, and filtering and discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311167859.7A CN116904149A (en) | 2023-09-12 | 2023-09-12 | Water-based pressure-sensitive adhesive for low-tackifying protective film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311167859.7A CN116904149A (en) | 2023-09-12 | 2023-09-12 | Water-based pressure-sensitive adhesive for low-tackifying protective film and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN116904149A true CN116904149A (en) | 2023-10-20 |
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| CN202311167859.7A Pending CN116904149A (en) | 2023-09-12 | 2023-09-12 | Water-based pressure-sensitive adhesive for low-tackifying protective film and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020956A (en) * | 2010-11-24 | 2011-04-20 | 广东达美胶粘制品有限公司 | Polyacrylate hot-melt pressure sensitive adhesive for polyethylene protective film and preparation method thereof |
| CN111285962A (en) * | 2020-03-30 | 2020-06-16 | 上海保立佳新材料有限公司 | Water-based environment-friendly acrylic emulsion pressure-sensitive adhesive for protective film and preparation method thereof |
| CN111534256A (en) * | 2020-05-28 | 2020-08-14 | 天津科技大学 | Low-sensitization medical acrylate pressure-sensitive adhesive and preparation method thereof |
| WO2021197056A1 (en) * | 2020-03-30 | 2021-10-07 | 上海保立佳新材料有限公司 | Medium viscosity protective film emulsion and preparation method therefor |
| CN114656905A (en) * | 2020-12-22 | 2022-06-24 | 苏州凡赛特材料科技有限公司 | Water-based pressure-sensitive adhesive and preparation method thereof |
-
2023
- 2023-09-12 CN CN202311167859.7A patent/CN116904149A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020956A (en) * | 2010-11-24 | 2011-04-20 | 广东达美胶粘制品有限公司 | Polyacrylate hot-melt pressure sensitive adhesive for polyethylene protective film and preparation method thereof |
| CN111285962A (en) * | 2020-03-30 | 2020-06-16 | 上海保立佳新材料有限公司 | Water-based environment-friendly acrylic emulsion pressure-sensitive adhesive for protective film and preparation method thereof |
| WO2021197056A1 (en) * | 2020-03-30 | 2021-10-07 | 上海保立佳新材料有限公司 | Medium viscosity protective film emulsion and preparation method therefor |
| CN111534256A (en) * | 2020-05-28 | 2020-08-14 | 天津科技大学 | Low-sensitization medical acrylate pressure-sensitive adhesive and preparation method thereof |
| CN114656905A (en) * | 2020-12-22 | 2022-06-24 | 苏州凡赛特材料科技有限公司 | Water-based pressure-sensitive adhesive and preparation method thereof |
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