CN114214010A - Easy-to-peel pressure sensitive adhesive and preparation method thereof - Google Patents
Easy-to-peel pressure sensitive adhesive and preparation method thereof Download PDFInfo
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- CN114214010A CN114214010A CN202111614335.9A CN202111614335A CN114214010A CN 114214010 A CN114214010 A CN 114214010A CN 202111614335 A CN202111614335 A CN 202111614335A CN 114214010 A CN114214010 A CN 114214010A
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- acrylate
- sensitive adhesive
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- 239000004820 Pressure-sensitive adhesive Substances 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title claims description 9
- 239000000178 monomer Substances 0.000 claims abstract description 47
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 37
- 239000000853 adhesive Substances 0.000 claims abstract description 32
- 230000001070 adhesive effect Effects 0.000 claims abstract description 29
- 239000002904 solvent Substances 0.000 claims abstract description 21
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 14
- -1 polyoxypropylene Polymers 0.000 claims abstract description 14
- 239000012986 chain transfer agent Substances 0.000 claims abstract description 13
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims abstract description 12
- 229930195725 Mannitol Natural products 0.000 claims abstract description 12
- ZCKPFAYILJKXAT-UHFFFAOYSA-N benzyl benzenecarbodithioate Chemical compound C=1C=CC=CC=1C(=S)SCC1=CC=CC=C1 ZCKPFAYILJKXAT-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 12
- 239000003999 initiator Substances 0.000 claims abstract description 12
- 235000010355 mannitol Nutrition 0.000 claims abstract description 12
- 239000000594 mannitol Substances 0.000 claims abstract description 12
- 229920001451 polypropylene glycol Polymers 0.000 claims abstract description 12
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 39
- 238000003756 stirring Methods 0.000 claims description 20
- 239000011259 mixed solution Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 11
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 10
- OWPUOLBODXJOKH-UHFFFAOYSA-N 2,3-dihydroxypropyl prop-2-enoate Chemical compound OCC(O)COC(=O)C=C OWPUOLBODXJOKH-UHFFFAOYSA-N 0.000 claims description 9
- AEPWOCLBLLCOGZ-UHFFFAOYSA-N 2-cyanoethyl prop-2-enoate Chemical compound C=CC(=O)OCCC#N AEPWOCLBLLCOGZ-UHFFFAOYSA-N 0.000 claims description 9
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 9
- FSAJWMJJORKPKS-UHFFFAOYSA-N octadecyl prop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C=C FSAJWMJJORKPKS-UHFFFAOYSA-N 0.000 claims description 9
- 239000012988 Dithioester Substances 0.000 claims description 7
- 125000005022 dithioester group Chemical group 0.000 claims description 7
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 claims description 6
- UFDFFEMHDKXMBG-UHFFFAOYSA-N 2-acetamidoprop-2-enoic acid Chemical compound CC(=O)NC(=C)C(O)=O UFDFFEMHDKXMBG-UHFFFAOYSA-N 0.000 claims description 5
- WROUWQQRXUBECT-UHFFFAOYSA-N 2-ethylacrylic acid Chemical compound CCC(=C)C(O)=O WROUWQQRXUBECT-UHFFFAOYSA-N 0.000 claims description 5
- 239000004793 Polystyrene Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000004132 cross linking Methods 0.000 claims description 5
- 229920002223 polystyrene Polymers 0.000 claims description 5
- 238000001704 evaporation Methods 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 13
- 238000012360 testing method Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229960001701 chloroform Drugs 0.000 description 1
- 231100000739 chronic poisoning Toxicity 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002366 halogen compounds Chemical class 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J151/08—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/06—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals
- C08F283/065—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polyethers, polyoxymethylenes or polyacetals on to unsaturated polyethers, polyoxymethylenes or polyacetals
-
- 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
-
- 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
-
- 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
Abstract
The invention provides an easily-stripped pressure-sensitive adhesive which comprises 8-12 parts by weight of acrylic acid monomer, 30-42 parts by weight of acrylate monomer, 10-15 parts by weight of benzyl dithiobenzoate, 3-10 parts by weight of polyoxypropylene mannitol dioleate, 2-6 parts by weight of chain transfer agent, 3-5 parts by weight of initiator, 5-8 parts by weight of cross-linking agent and 88-110 parts by weight of solvent. The easily-peelable pressure-sensitive adhesive disclosed by the invention is high in peeling degree at normal temperature, can be continuously used for multiple times to keep the initial viscosity, and is free from any residual adhesive after multiple times of peeling.
Description
Technical Field
The invention belongs to the technical field of adhesives, and particularly relates to an easily-stripped pressure-sensitive adhesive and a preparation method thereof.
Background
Pressure-sensitive adhesives are adhesives that adhere to an adherend under external pressure. The adhesive tape is widely applied to industries such as box sealing tapes, labels, protective adhesive tapes, decorative boards and the like. With the development of industry, the application market of the adhesive for the self-adhesive label is more and more extensive, the variety is more and more, and the common pressure-sensitive adhesive has a solvent type, a water-based type, a hot-melt type and the like. At present, the dosage of solvent-type products is relatively large, and the solvent used for the solvent-type acrylate pressure-sensitive adhesive is generally aromatic compounds such as benzene, toluene, xylene and the like, and halogen compounds such as trichloromethane, trichloroethylene and the like are sometimes used. During the production and use processes of the solvent-based pressure-sensitive adhesive products, the toxic substances are continuously volatilized to cause serious harm to the health of people, and the serious reduction of leucocytes or chronic poisoning and serious even life threatening can be caused by long-term contact.
The peel strength of a pressure-sensitive adhesive is mainly determined by the adhesion of the polymer and the adhesion of the adhesive to the bonding surface, the tack is mainly determined by the cohesion, the cohesion and the adhesion are mutually influenced, and the cohesion and the tack are also properly balanced. The traditional pressure-sensitive adhesive product has poor cohesion, poor adaptability to base materials with different polarities and poor temperature resistance, so that the defects of the adhesion and the weather resistance of the product exist, and particularly the defects of an aqueous system product are obvious.
The application market of the adhesive for the peelable self-adhesive label is more and more extensive, the existing adhesive is mainly solvent type and hot melt type, and the mainstream bi-component solvent type pressure-sensitive adhesive used by the peelable self-adhesive has the problems of environmental protection and volatilization of a large amount of organic matters.
Disclosure of Invention
The invention aims to provide an easily-peeled pressure-sensitive adhesive with high peel strength, aiming at solving the problem of low peel strength of the pressure-sensitive adhesive at high temperature or low temperature in the prior art.
In order to achieve the purposes, the specific scheme is as follows:
an easily-stripped pressure-sensitive adhesive comprises 8-12 parts by weight of an acrylic monomer, 30-42 parts by weight of an acrylate monomer, 10-15 parts by weight of benzyl dithiobenzoate, 3-10 parts by weight of polyoxypropylene mannitol dioleate, 2-6 parts by weight of a chain transfer agent, 3-5 parts by weight of an initiator, 5-8 parts by weight of a cross-linking agent and 88-110 parts by weight of a solvent.
Preferably, the easy-release pressure-sensitive adhesive is prepared by the following steps: 1) firstly, mixing an acrylic monomer, an acrylate monomer, benzyl dithiobenzoate and polyoxypropylene mannitol dioleate, and uniformly stirring to obtain a monomer mixed solution, 2) adding 40-50% of the monomer mixed solution into a reaction kettle, controlling the reaction kettle to heat, adding a chain transfer agent and an initiator at the temperature of 70 ℃, stirring and mixing, wherein the dropping condition is 70 ℃, 60min, and preserving heat for 90min after the dropping is finished; 3) adding a solvent ethyl acetate and the rest monomer mixed solution, stirring for 60min, and cooling to room temperature to obtain an acrylate adhesive; 4) adding a cross-linking agent into the acrylate adhesive, and uniformly stirring to obtain the acrylate cross-linked adhesive; 5) and evaporating the solvent ethyl acetate from the prepared acrylate crosslinking adhesive to prepare the easily-stripped pressure-sensitive adhesive.
Preferably, the acrylic monomer is a mixture of 2-ethyl acrylic acid and 2-acetamido acrylic acid in a weight part ratio of 1: 3-7.
Preferably, the acrylate monomers include a mixture of 2, 3-dihydroxypropyl acrylate, octadecyl acrylate, 2-cyanoethyl acrylate, methyl methacrylate.
Preferably, the acrylate monomer comprises a mixture of 2, 3-dihydroxypropyl acrylate, octadecyl acrylate, 2-cyanoethyl acrylate and methyl methacrylate in parts by weight of 3-7:1:2-4: 1-3.
Preferably, the acrylate monomer comprises a mixture of 2, 3-dihydroxypropyl acrylate, octadecyl acrylate, 2-cyanoethyl acrylate and methyl methacrylate in a weight ratio of 5:1:3: 1.
Preferably, the chain transfer agent comprises any one of a dithioester and dodecyl mercaptan or a mixture thereof.
Preferably, the chain transfer agent is a mixture of dithioester and dodecyl mercaptan in a weight ratio of 3: 2.
Preferably, the initiator is azobisisobutyronitrile.
Preferably, the crosslinking agent is a polystyrene copolymer.
Compared with the prior art, the invention has the following technical effects:
1. the easily-peelable pressure-sensitive adhesive disclosed by the invention is high in peeling degree at normal temperature, can be continuously used for multiple times to keep the initial viscosity, and is free from any residual adhesive after multiple times of peeling.
2. The easily-stripped pressure-sensitive adhesive has high crosslinking degree and strong cohesion, and the internal chain transfer process improves the crosslinking degree of the whole pressure-sensitive adhesive.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
A first part:
example 1
An easily-stripped pressure sensitive adhesive is prepared by weighing the following raw materials:
0.8kg of acrylic monomer; wherein, the 2-ethyl acrylic acid is 0.2kg, and the 2-acetamido acrylic acid is 0.6 kg;
4kg of acrylate monomer; 2kg of 2, 3-dihydroxypropyl acrylate; 0.4kg of octadecyl acrylate; 1.2kg of 2-cyanoethyl acrylate and 0.4kg of methyl methacrylate.
1.4kg of benzyl dithiobenzoate;
0.8kg of polyoxypropylene mannitol dioleate;
0.3kg of dithioester;
0.3kg of azobisisobutyronitrile;
0.8kg of polystyrene copolymer;
the solvent ethyl acetate 0 kg.
1) Firstly, mixing an acrylic monomer, an acrylate monomer, benzyl dithiobenzoate and polyoxypropylene mannitol dioleate, and uniformly stirring to obtain a monomer mixed solution, 2) adding 40-50% of the monomer mixed solution into a reaction kettle, controlling the reaction kettle to heat, adding a chain transfer agent and an initiator at the temperature of 70 ℃, stirring and mixing, wherein the dropping condition is 70 ℃, 60min, and preserving heat for 90min after the dropping is finished; 3) adding a solvent ethyl acetate and the rest monomer mixed solution, stirring for 60min, and cooling to room temperature to obtain an acrylate adhesive; 4) adding a cross-linking agent into the acrylate adhesive, and uniformly stirring to obtain the acrylate cross-linked adhesive; 5) the solvent ethyl acetate was evaporated from the obtained acrylic ester crosslinked adhesive to obtain the easily peelable pressure sensitive adhesive of example 1.
The easy-to-peel pressure-sensitive adhesive of example 1 was placed in a coater, which coated the easy-to-peel pressure-sensitive adhesive on a release substrate, and release paper was attached to the other side of the release substrate to obtain the easy-to-peel pressure-sensitive adhesive tape of example 1.
The formulations of the easy-release pressure-sensitive adhesives of examples 1 to 3 are described in the following tables, and the preparation method of the easy-release pressure-sensitive adhesive tape is described in reference to example 1.
The peel strength and tack holding ability of the easy-peel pressure-sensitive adhesive of the above 3 examples were tested with reference to GB4851-84 and related standards, and the peel strength was tested with reference to GB/T2792-1998.
The average value of three tests is obtained, and the test results are as follows:
from the above test data of examples 1-3, it can be seen that the easy-to-peel pressure sensitive adhesives of examples 1-3 have no adhesive residue after repeated peeling and no obvious change in peel strength.
A second part:
example 4:
an easily-stripped pressure sensitive adhesive is prepared by weighing the following raw materials:
0.8kg of acrylic monomer; wherein, the 2-ethyl acrylic acid is 0.2kg, and the 2-acetamido acrylic acid is 0.6 kg;
4kg of acrylate monomer; 2kg of 2, 3-dihydroxypropyl acrylate; 0.4kg of octadecyl acrylate; 1.2kg of 2-cyanoethyl acrylate and 0.4kg of methyl methacrylate.
1.4kg of benzyl dithiobenzoate;
0.8kg of polyoxypropylene mannitol dioleate;
0.18kg of dithioester;
0.12kg of dodecyl mercaptan;
0.3kg of azobisisobutyronitrile;
0.8kg of polystyrene copolymer;
the solvent ethyl acetate 0 kg.
1) Firstly, mixing an acrylic monomer, an acrylate monomer, benzyl dithiobenzoate and polyoxypropylene mannitol dioleate, and uniformly stirring to obtain a monomer mixed solution, 2) adding 40-50% of the monomer mixed solution into a reaction kettle, controlling the reaction kettle to heat, adding a chain transfer agent and an initiator at the temperature of 70 ℃, stirring and mixing, wherein the dropping condition is 70 ℃, 60min, and preserving heat for 90min after the dropping is finished; 3) adding a solvent ethyl acetate and the rest monomer mixed solution, stirring for 60min, and cooling to room temperature to obtain an acrylate adhesive; 4) adding a cross-linking agent into the acrylate adhesive, and uniformly stirring to obtain the acrylate cross-linked adhesive; 5) the solvent ethyl acetate was evaporated from the obtained acrylic ester crosslinked adhesive to obtain the easily peelable pressure sensitive adhesive of example 4.
The easy-to-peel pressure-sensitive adhesive of example 4 was placed in a coater, which coated the easy-to-peel pressure-sensitive adhesive on a release substrate, and release paper was attached to the other side of the release substrate to obtain the easy-to-peel pressure-sensitive adhesive tape of example 4.
The formulations of the easy-peel pressure-sensitive adhesive of examples 4 to 6 were as follows, and the preparation method of the easy-peel pressure-sensitive adhesive tape was referred to example 4.
The easy-release pressure-sensitive adhesives of 3 of the above examples 4 to 6 were subjected to test tests, and the test results were averaged three times as follows:
from the above test data of examples 4-6, it can be seen that the easy-to-peel pressure sensitive adhesives of examples 4-6 have advantages in multi-peel strength, and the peel strength changes are small and basically unchanged.
And a third part:
comparative example 1:
a pressure-sensitive adhesive is prepared by weighing the following raw materials:
0.8kg of acrylic monomer; wherein, the 2-ethyl acrylic acid is 0.2kg, and the 2-acetamido acrylic acid is 0.6 kg;
4kg of acrylate monomer; 2kg of 2, 3-dihydroxypropyl acrylate; 0.4kg of octadecyl acrylate; 2kg of 2-cyanoethyl acrylate and 2kg of methyl methacrylate.
1.4kg of benzyl dithiobenzoate;
0.8kg of polyoxypropylene mannitol dioleate;
0.18kg of dithioester;
0.12kg of dodecyl mercaptan;
0.3kg of azobisisobutyronitrile;
0.8kg of polystyrene copolymer;
the solvent ethyl acetate 0 kg.
1) Firstly, mixing an acrylic monomer, an acrylate monomer, benzyl dithiobenzoate and polyoxypropylene mannitol dioleate, and uniformly stirring to obtain a monomer mixed solution, 2) adding 40-50% of the monomer mixed solution into a reaction kettle, controlling the reaction kettle to heat, adding a chain transfer agent and an initiator at the temperature of 70 ℃, stirring and mixing, wherein the dropping condition is 70 ℃, 60min, and preserving heat for 90min after the dropping is finished; 3) adding a solvent ethyl acetate and the rest monomer mixed solution, stirring for 60min, and cooling to room temperature to obtain an acrylate adhesive; 4) adding a cross-linking agent into the acrylate adhesive, and uniformly stirring to obtain the acrylate cross-linked adhesive; 5) and evaporating the solvent ethyl acetate from the prepared acrylate crosslinking adhesive to prepare the pressure-sensitive adhesive of the comparative example 1.
And (3) putting the pressure-sensitive adhesive in the comparative example 1 into a coating machine, coating the pressure-sensitive adhesive on a release substrate by the coating machine, and attaching release paper to the other side of the release substrate to obtain the pressure-sensitive adhesive tape in the comparative example 1.
The pressure-sensitive adhesive formulation of comparative example-3 is as follows, and the pressure-sensitive adhesive tape was prepared by referring to comparative example 1.
The pressure-sensitive adhesive tapes prepared in comparative examples 1 to 3 were subjected to performance tests, and the results were as follows:
the pressure-sensitive adhesives of comparative examples 1 to 3 exhibited satisfactory resistance to peeling, but the peel strength varied greatly over time.
The fourth part:
comparative example 16 did not use an initiator and comparative example 17 did not use a cross-linking agent, and the specific preparation method is referred to example 1.
The starting material of comparative example 18 is referred to in example 4, but the preparation method is specifically: 1) the pressure sensitive adhesive of comparative example 18 was prepared by first mixing an acrylic acid monomer, an acrylate monomer, benzyl dithiobenzoate, polyoxypropylene mannitol dioleate, a chain transfer agent, a cross-linking agent, and an initiator.
Comparative examples 4-18 were tested and the results were as follows:
the above embodiments show that the formula and the preparation method of the invention are very critical to the performance of the easily-peelable pressure-sensitive adhesive.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An easily-stripped pressure-sensitive adhesive comprises 8-12 parts by weight of an acrylic monomer, 30-42 parts by weight of an acrylate monomer, 10-15 parts by weight of benzyl dithiobenzoate, 3-10 parts by weight of polyoxypropylene mannitol dioleate, 2-6 parts by weight of a chain transfer agent, 3-5 parts by weight of an initiator, 5-8 parts by weight of a cross-linking agent and 88-110 parts by weight of a solvent.
2. The easy-peel pressure-sensitive adhesive according to claim 1, wherein: the preparation method comprises the following steps: 1) firstly, mixing an acrylic monomer, an acrylate monomer, benzyl dithiobenzoate and polyoxypropylene mannitol dioleate, and uniformly stirring to obtain a monomer mixed solution, 2) adding 40-50% of the monomer mixed solution into a reaction kettle, controlling the reaction kettle to heat, adding a chain transfer agent and an initiator at the temperature of 70 ℃, stirring and mixing, wherein the dropping condition is 70 ℃, 60min, and preserving heat for 90min after the dropping is finished; 3) adding a solvent ethyl acetate and the rest monomer mixed solution, stirring for 60min, and cooling to room temperature to obtain an acrylate adhesive; 4) adding a cross-linking agent into the acrylate adhesive, and uniformly stirring to obtain the acrylate cross-linked adhesive; 5) and evaporating the solvent ethyl acetate from the prepared acrylate crosslinking adhesive to prepare the easily-stripped pressure-sensitive adhesive.
3. The easy-peel pressure-sensitive adhesive according to claim 1, wherein: the acrylic monomer is a mixture of 2-ethyl acrylic acid and 2-acetamido acrylic acid in a weight part ratio of 1: 3-7.
4. The easy-peel pressure-sensitive adhesive according to claim 1, wherein: the acrylate monomer comprises a mixture of 2, 3-dihydroxypropyl acrylate, octadecyl acrylate, 2-cyanoethyl acrylate, and methyl methacrylate.
5. The easy-peel pressure-sensitive adhesive according to claim 4, wherein: the acrylate monomer comprises a mixture of 2, 3-dihydroxypropyl acrylate, octadecyl acrylate, 2-cyanoethyl acrylate and methyl methacrylate in a weight ratio of 3-7:1:2-4: 1-3.
6. The easy-peel pressure-sensitive adhesive according to claim 4, wherein: the acrylate monomer comprises a mixture of 2, 3-dihydroxypropyl acrylate, octadecyl acrylate, 2-cyanoethyl acrylate and methyl methacrylate in a weight ratio of 5:1:3: 1.
7. The easy-peel pressure-sensitive adhesive according to claim 1, wherein: the chain transfer agent comprises any one of dithioester and dodecyl mercaptan or a mixture thereof.
8. The easy-peel pressure-sensitive adhesive according to claim 7, wherein: the chain transfer agent is a mixture of dithioester and dodecyl mercaptan in a weight ratio of 3: 2.
9. The easy-peel pressure-sensitive adhesive according to claim 1, wherein: initiator azobisisobutyronitrile.
10. The easy-peel pressure-sensitive adhesive according to claim 1, wherein: the cross-linking agent is polystyrene copolymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114836143A (en) * | 2022-05-31 | 2022-08-02 | 泰兴联创绝缘材料有限公司 | High-temperature-resistant UV (ultraviolet) strippable pressure-sensitive adhesive film and preparation method thereof |
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| CN108219702A (en) * | 2018-01-02 | 2018-06-29 | 上海保立佳新材料有限公司 | A kind of novel acrylic pressure-sensitive adhesive protective film |
| CN109609049A (en) * | 2018-12-19 | 2019-04-12 | 苏州新中德新型材料有限公司 | Punching press protective film easily peelable pressure sensitive adhesive and preparation method thereof |
| CN109651970A (en) * | 2018-12-19 | 2019-04-19 | 苏州新中德新型材料有限公司 | High-intensitive puncture resistant protective film |
| CN110437758A (en) * | 2019-07-11 | 2019-11-12 | 昆山博益鑫成高分子材料有限公司 | A kind of anti-highly basic high temperature resistant easy-stripping type PO base protective film pressure-sensitive adhesive formula and preparation method thereof |
| CN113549413A (en) * | 2021-08-16 | 2021-10-26 | 江苏耐斯数码科技股份有限公司 | Benzene-free solvent-type peelable pressure-sensitive adhesive and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108219702A (en) * | 2018-01-02 | 2018-06-29 | 上海保立佳新材料有限公司 | A kind of novel acrylic pressure-sensitive adhesive protective film |
| CN109609049A (en) * | 2018-12-19 | 2019-04-12 | 苏州新中德新型材料有限公司 | Punching press protective film easily peelable pressure sensitive adhesive and preparation method thereof |
| CN109651970A (en) * | 2018-12-19 | 2019-04-19 | 苏州新中德新型材料有限公司 | High-intensitive puncture resistant protective film |
| CN110437758A (en) * | 2019-07-11 | 2019-11-12 | 昆山博益鑫成高分子材料有限公司 | A kind of anti-highly basic high temperature resistant easy-stripping type PO base protective film pressure-sensitive adhesive formula and preparation method thereof |
| CN113549413A (en) * | 2021-08-16 | 2021-10-26 | 江苏耐斯数码科技股份有限公司 | Benzene-free solvent-type peelable pressure-sensitive adhesive and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114836143A (en) * | 2022-05-31 | 2022-08-02 | 泰兴联创绝缘材料有限公司 | High-temperature-resistant UV (ultraviolet) strippable pressure-sensitive adhesive film and preparation method thereof |
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