CN116042107A - Acrylic foam adhesive tape resistant to high-temperature and high-humidity environment and preparation method thereof - Google Patents
Acrylic foam adhesive tape resistant to high-temperature and high-humidity environment and preparation method thereof Download PDFInfo
- Publication number
- CN116042107A CN116042107A CN202211727229.6A CN202211727229A CN116042107A CN 116042107 A CN116042107 A CN 116042107A CN 202211727229 A CN202211727229 A CN 202211727229A CN 116042107 A CN116042107 A CN 116042107A
- Authority
- CN
- China
- Prior art keywords
- parts
- temperature
- acrylic foam
- foaming
- monomer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000006260 foam Substances 0.000 title claims abstract description 85
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 239000002390 adhesive tape Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000000178 monomer Substances 0.000 claims abstract description 41
- 238000005187 foaming Methods 0.000 claims abstract description 37
- 239000011347 resin Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 20
- 239000004005 microsphere Substances 0.000 claims abstract description 19
- 239000002904 solvent Substances 0.000 claims abstract description 19
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 15
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 10
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 10
- 239000003999 initiator Substances 0.000 claims abstract description 10
- 150000003254 radicals Chemical class 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 238000004132 cross linking Methods 0.000 claims abstract description 8
- 239000007822 coupling agent Substances 0.000 claims abstract description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000001723 curing Methods 0.000 claims description 17
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- 230000032683 aging Effects 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 9
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 239000012855 volatile organic compound Substances 0.000 claims description 9
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 8
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 8
- 125000001153 fluoro group Chemical group F* 0.000 claims description 8
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 6
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 6
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 5
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 5
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 5
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 4
- 238000013329 compounding Methods 0.000 claims description 4
- 150000003505 terpenes Chemical class 0.000 claims description 4
- 235000007586 terpenes Nutrition 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- 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 3
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- 239000012948 isocyanate Substances 0.000 claims description 3
- 150000002513 isocyanates Chemical class 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 2
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 claims description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 2
- GHKOFFNLGXMVNJ-UHFFFAOYSA-N Didodecyl thiobispropanoate Chemical compound CCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCC GHKOFFNLGXMVNJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-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
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 2
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- PBOSTUDLECTMNL-UHFFFAOYSA-N lauryl acrylate Chemical compound CCCCCCCCCCCCOC(=O)C=C PBOSTUDLECTMNL-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000000643 oven drying Methods 0.000 claims description 2
- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 claims description 2
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 2
- -1 azodiisoheptonitrile Chemical compound 0.000 claims 1
- 238000010008 shearing Methods 0.000 abstract description 4
- 229920000642 polymer Polymers 0.000 description 27
- 230000006872 improvement Effects 0.000 description 15
- 238000010521 absorption reaction Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 238000011056 performance test Methods 0.000 description 8
- VBHXIMACZBQHPX-UHFFFAOYSA-N 2,2,2-trifluoroethyl prop-2-enoate Chemical compound FC(F)(F)COC(=O)C=C VBHXIMACZBQHPX-UHFFFAOYSA-N 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000002313 adhesive film Substances 0.000 description 5
- 239000003292 glue Substances 0.000 description 5
- 229920005830 Polyurethane Foam Polymers 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013022 formulation composition Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 210000000497 foam cell Anatomy 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000013035 low temperature curing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/10—Adhesives in the form of films or foils without carriers
-
- 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
- C08F220/1802—C2-(meth)acrylate, e.g. ethyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
- C08G18/622—Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
- C08G18/6225—Polymers of esters of acrylic or methacrylic acid
- C08G18/6229—Polymers of hydroxy groups containing esters of acrylic or methacrylic acid with aliphatic polyalcohols
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2170/00—Compositions for adhesives
-
- 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
- C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
- C09J2301/208—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesive Tapes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention discloses an acrylic foam adhesive tape resistant to high-temperature and high-humidity environments, which comprises the following raw materials in parts by weight: 50-70 parts of polyacrylate; 5-25 parts of modified resin; 0.5-2 parts of curing agent; 0.5-2 parts of coupling agent; 0.3-1 part of antioxidant; 30-50 parts of a solvent; 0.3-3 parts of foaming microsphere; 0.5 to 3 portions of color paste. Wherein the polyacrylate comprises the following raw materials in parts by weight: 30-50 parts of soft monomer; 5-20 parts of hard monomer; 1-5 parts of cross-linking monomer; 2-5 parts of functional monomer; 40-70 parts of a solvent; 0.1 to 1 part of free radical initiator. The invention also discloses a preparation method of the corresponding acrylic foam adhesive tape. The acrylic foam adhesive tape disclosed by the invention can absorb impact force, can be waterproof, has extremely low VOC content, and has good bonding performance and shearing resistance particularly in a high-temperature and high-humidity environment.
Description
Technical Field
The invention belongs to the technical field of acrylic foam, and particularly relates to an acrylic foam adhesive tape resistant to high-temperature and high-humidity environments and a preparation method thereof.
Background
At present, people are increasingly not away from electronic products such as computers and mobile phones, and the electronic products are easy to fall or collide in the using process, so that foam needs to be stuck to the lower frame of a screen of the electronic products for buffer protection, and the conventional buffer foam comprises PE foam, PU foam and EVA foam, and is glued by back glue on the foam.
The existing acrylic foam adhesive tape commonly used in the market generally adopts PE foam and PU foam as base materials, and then carries acrylic glue, wherein the PE foam is provided with flat uneven large cells due to the limitation of a production process, the cells are often open holes, water vapor can enter the foam in a high-temperature and high-humidity environment, and additives added in the foam are often separated out, and the foam and the back glue are separated at an interface due to different foam materials and acrylic glue, so that the normal use of a product is affected; the PU foam is easy to fall off scraps during die cutting due to the self material, and the PU foam is also in an open pore structure which is produced in general, so that the waterproof effect is poor;
in the prior art, the acrylic acid glue is directly foamed to obtain the acrylic acid foam adhesive tape, but the light curing is generally adopted in the market or the low-temperature curing is carried out, so that the problem that the volatilization of organic micromolecules is incomplete can be generated, the VOC content of the foam adhesive tape is very high, when the foam adhesive tape is used in a high-temperature and high-humidity environment, the organic micromolecules can be separated out, and water vapor enters the foam to cause the breakage of high polymer chains, so that the cohesive force of the foam is insufficient, the foam is stressed to be broken, and the normal use of electronic products can be influenced.
Disclosure of Invention
Aiming at one or more of the defects or improvement demands of the prior art, the invention provides an acrylic foam tape resistant to high-temperature and high-humidity environments and a preparation method thereof.
In order to achieve the above object, according to one aspect of the present invention, there is provided an acrylic foam tape having a structure comprising two release films and a foam layer, wherein the foam layer has a VOCs content of less than 50g/kg, further less than 30g/kg.
As a further improvement of the invention, the average diameter of the foam cells of the foam body is 0.02-0.07mm, the average hole spacing is 0.01-0.05mm, and the foam body has better strength while ensuring the buffering performance.
As a further improvement of the present invention, the water drop angle of the foam is greater than 100 ° and less than 150 °, more preferably, the water drop angle of the foam is greater than 110 ° and less than 140 °.
As a further improvement of the invention, the peel strength aging rate X of the acrylic foam tape is not more than 15%; peel strength aging rate x= (T1-T2)/T1, T1 is unaged normal temperature peel strength, and T2 is peel strength after aging.
The thickness of the foam is not particularly limited, but is preferably 1mm in upper limit, more preferably 0.8mm in upper limit, and 0.05mm in lower limit, more preferably 0.1mm in lower limit, for use in electronic products.
As a further improvement of the invention, the foam comprises the following raw materials in parts by weight: 50-70 parts of polyacrylate resin, 5-15 parts of modified resin, 0.5-2 parts of curing agent, 0.5-2 parts of coupling agent, 0.3-1 part of antioxidant, 0.3-3 parts of foaming microsphere, 0.5-3 parts of color paste and 30-50 parts of solvent.
As a further improvement of the present invention, the polyacrylate resin comprises the following raw materials in parts by weight, polymerized from the following raw materials:
30-50 parts of soft monomer, 5-20 parts of hard monomer and 1-5 parts of crosslinking monomer; 2-5 parts of functional monomer; 40-60 parts of solvent; 0.1 to 1 part of free radical initiator.
Preferably, the Tg of the soft monomer is lower than-20 ℃, the addition amount of the soft monomer is 30-50 parts, the viscosity of the polymer is lower when the Tg of the soft monomer is lower than 30 parts, the cohesion of the polymer is poorer when the Tg of the soft monomer exceeds 50 parts, and the shearing resistance is extremely poor at high temperature. The soft monomer is further preferably one or more of ethyl acrylate, butyl acrylate, isooctyl acrylate and lauryl acrylate.
Preferably, the Tg of the hard monomer is higher than 90 ℃, the addition amount of the hard monomer is 5-30 parts, the cohesion of the polymer is poor below 5 parts, the shearing resistance at high temperature is extremely poor, and the viscosity of the polymer is low above 30 parts. The hard monomer is further preferably one or more of styrene, acrylonitrile, methyl methacrylate.
Preferably, the crosslinking monomer is added in an amount of 1 to 5 parts, and below 1 part, the polymer has a low post-strength, and above 5 parts, it causes gel formation during polymerization. The crosslinking monomer is further preferably one or more of acrylic acid, methacrylic acid, N-methylolacrylamide and hydroxyethyl acrylate.
Preferably, the functional monomer is a side chain fluorine-containing monomer, on one hand, the addition of the functional monomer is strong in interaction among polymer chains due to the strong polarity of fluorine atoms, so that the high temperature resistance of the polymer is improved, on the other hand, the introduction of the fluorine atoms reduces the surface energy of the polymer, the water drop angle of the polymer is increased, the water resistance is greatly improved, and the chemical structural formula of the monomer is shown as the following formula (1) or formula (2):
in the formula (1), R is an alkyl group containing fluorine atoms, wherein the number of carbon atoms is not more than 8, and the number of fluorine atoms is 3-12.
Preferably, the solvent is one or more of ethyl acetate, isopropanol, toluene and heptane.
Preferably, the free radical initiator is added in an amount of 0.1 to 1 part, and below 0.1 part, it may cause the monomer to be not polymerized, and above 1 part, it may cause the molecular weight of the polymer to be lowered, and the strength of the polymer foam in the latter stage may be insufficient. The free radical initiator is further preferably one or more of azobisisobutyronitrile, azobisisoheptonitrile, benzoyl peroxide, diisopropyl peroxydicarbonate and dicumyl peroxide.
As a further improvement of the present invention, the method for preparing the polyacrylate resin comprises the steps of:
weighing soft monomers and 4/5 solvent in corresponding weight portions, introducing nitrogen for protection, dropwise adding 2/3 free radical initiator, 1/10 solvent and hard monomers and functional monomers in corresponding weight portions at 78-82 ℃, dropwise adding and reacting for 2-2.5h, and preserving heat for 1-1.5h;
dripping the rest 1/3 free radical initiator and 1/10 solvent, and then preserving the temperature for 3-4 hours at 76-80 ℃ to obtain the polyacrylate.
As a further improvement of the invention, the softening point of the modified resin is 120-150 ℃, the high softening point resin can improve the temperature resistance of polyacrylate, on the other hand, the molecular weight of the resin is smaller, the viscosity of the polymer foam can be improved, when the addition amount of the modified resin is less than 5 parts, the viscosity of the polymer is insufficient, and when the addition amount is more than 15 parts, the initial viscosity of the polymer foam is reduced, and the cohesive force is reduced. The modified resin is preferably one or more of rosin resin, terpene phenol resin, and polyurethane resin.
As a further improvement of the present invention, the curing agent is added in an amount of 0.5 to 2 parts, and below 0.5 parts, the polymer foam is insufficient in crosslinking degree, resulting in too low strength to be easily broken, and above 2 parts, the polymer viscosity is lowered, and the gel is easily produced. The curing agent is preferably one or more of isocyanate curing agent, epoxy curing agent, and pyridine curing agent.
As a further improvement of the invention, the coupling agent is silane coupling agent, and when the addition amount is less than 0.5-2 parts, the crosslinking degree of the polymer foam adhesive tape is too low, the adhesiveness is poor, and when the addition amount is more than 2 parts, the adhesive force of the foam adhesive tape is also reduced.
As a further improvement of the invention, the antioxidant is one or more of 1010, 1076, 168, 618, UV928, DLTDP and 412S, which can effectively improve the condition that the product is oxidized at high temperature.
As a further improvement of the invention, the solvent is one or more of ethyl acetate, isopropanol, toluene and heptane.
As a further improvement of the invention, the foaming microsphere is an unexpanded foaming microsphere, the initial foaming temperature is 130-150 ℃, the maximum foaming temperature is 150-170 ℃, the cracking temperature is 170-220 ℃, the foaming temperature interval is not more than 50 ℃, the initial foaming temperature is higher than the highest temperature of the drying temperature interval, otherwise, the partial foaming in the drying process can not reach the expected foaming effect. The addition of the foaming microsphere is 0.3-3 parts, when the addition is lower than 0.3 parts, the foaming multiplying power of the polymer foam is too low, the buffering effect is poor, when the addition is higher than 3 parts, the foaming multiplying power of the polymer is too high, the strength of the foam is too low, and the foam is easy to break when being impacted.
According to another aspect of the present invention, there is provided a method for preparing an acrylic foam tape, comprising the steps of: the preparation method comprises the steps of weighing polyacrylate resin, modified resin, curing agent, antioxidant, foaming microsphere, color paste and solvent according to parts by weight, uniformly mixing, coating the mixed resin on a release film, drying the release film through an oven to form a layer, repeating the operation to obtain other layers, compounding the layers together, foaming, and winding and placing.
As a further improvement of the invention, in the preparation process, the highest temperature of the oven drying temperature range is lower than the initial foaming temperature of the foaming microsphere; the highest temperature in the oven foaming temperature interval is higher than the initial foaming temperature of the foaming microsphere and lower than the rupture temperature of the foaming microsphere.
In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art:
(1) In the polyacrylate adopted by the invention, the acrylic monomer with the side chain containing fluorine atoms is introduced, and due to the strong polarity of the fluorine atoms, the acrylic monomer can form hydrogen bonds with hydroxyl groups or carboxyl groups in adjacent polymer chains to enhance the interaction between the polymer chains, so that the high temperature resistance of the polymer is improved, on the other hand, the introduction of the fluorine atoms reduces the surface energy of the polymer, the water drop angle of the polymer is increased, the water resistance is greatly improved, the high temperature and humidity resistance of the polymer is further improved, and the problem of high temperature and humidity resistance of the existing acrylic foam adhesive tape is solved.
(2) In the preparation method of the polyacrylate foam adhesive tape, the synthesized polyacrylate resin, the modified resin, the curing agent, the antioxidant, the foaming microsphere, the color paste and the solvent are uniformly mixed, the mixed resin is coated on a release film, the release film is dried by a baking oven to form a layer, the operation is repeated to obtain other layers, the other layers are compounded together, and then the foaming and the rolling are carried out. The VOC content of the foam adhesive tape is reduced during high-temperature baking by being coated on different layers, so that the VOC release during later use is reduced, the entry of water vapor is reduced, and the high-temperature and high-humidity performance of the foam adhesive tape is improved.
Drawings
Fig. 1 is a schematic structural view of an acrylic foam tape resistant to high temperature and high humidity according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
(1) Preparation of polyacrylate:
the raw materials of the components in parts by weight are as follows: 34 parts of Ethyl Acrylate (EA); 7 parts of styrene (St); 2 parts of Acrylic Acid (AA); 3 parts of hydroxyethyl acrylate (HEA); 4 parts of trifluoroethyl acrylate (TFEA); 50 parts of Ethyl Acetate (EAC); 0.3 parts of Benzoyl Peroxide (BPO).
34 parts of ethyl acrylate and 40 parts of ethyl acetate are weighed, nitrogen is introduced for protection, 0.2 part of benzoyl peroxide, 5 parts of ethyl acetate, 7 parts of styrene, 2 parts of acrylic acid, 3 parts of hydroxyethyl acrylate and 4 parts of trifluoroethyl acrylate are dropwise added at the temperature of 78-82 ℃ for reaction for 2 hours, the temperature is kept for 1 hour, the rest 0.1 part of benzoyl peroxide and 5 parts of ethyl acetate are dropwise added, and the temperature is kept for 3 hours at the temperature of 76-80 ℃ to obtain the polyacrylate.
(2) Preparation of acrylic foam adhesive tape
The raw materials of the components in parts by weight are as follows: 70 parts of synthetic polyacrylate; 7 parts of terpene phenol resin; 0.6 part of isocyanate curing agent; 0.7 parts of silane coupling agent; UV928 antioxidant 0.5 part; 30 parts of ethyl acetate; 0.4 parts of unexpanded expanded microspheres; 1.4 parts of black paste.
The preparation method comprises the following specific steps:
1) Firstly adding the polyacrylate, the modified resin and the antioxidant, black paste, foaming microspheres, a coupling agent and a curing agent, uniformly stirring, and then filtering to obtain a coating liquid;
2) Coating the obtained coating liquid on a PET release film through a coating machine;
3) Drying in an oven at 60-130 ℃, and compounding a release film after drying to obtain a layer of adhesive film with the thickness of 0.05 mm;
4) Repeating the step 2) twice to obtain a two-layer adhesive film and a three-layer adhesive film;
5) And compounding the obtained three-layer adhesive film, foaming the obtained adhesive film in an oven at 150-170 ℃ and 0.2mm thick, and rolling and placing to obtain the high-temperature and high-humidity resistant acrylic foam adhesive tape.
The following performance tests were performed on the foam tape obtained:
thickness test, refer to GB/T7125-2014 adhesive tape thickness test method;
density testing, reference GB/T6343-2009 foam and rubber apparent density determination;
compressive stress strain testing, reference is made to the measurement of compressive stress strain characteristics of the GB/T18942.1-2003 high polymer porous elastic material;
peel force test, refer to the test method of the peel strength of GB/T2792-2014 adhesive tape;
peel strength aging rate test, wherein the peel strength aging rate X= (T1-T2)/T1, T1 is unaged normal temperature peel strength, and T2 is peel strength after aging;
the water drop angle test is carried out by adopting a water drop angle measuring instrument;
VOC content test, refer to the test method of the limit of volatile organic compounds of GB 33372-2020 adhesives;
85 ℃/85% humidity retention test, refer to the test method of the adhesive tape holding viscosity of GB/T4851-2014;
point impact absorption, 9.08g pellet/30 cm height point impact absorption;
water absorption test, water absorption weight was measured by soaking for 24 hours, and reference was made to the measurement of water absorption of GB/T8810-2005 rigid foam.
Examples 2 to 19
Preparation of polyacrylate: the polyacrylate formulation composition is shown in tables 11 and 12 and the polymerization process is the same as in example 1.
Preparation of acrylic foam tape: the composition of each component of the acrylic foam tape was as shown in tables 11 and 12, and the specific procedure was the same as in example 1.
The foam tapes obtained were tested according to the same performance test method as in example 1.
The results of the performance tests of the respective examples are shown in tables 11 and 12.
Table 11 examples 1 to 10 performance test results table
Table 12 examples 11 to 19 performance test results table
Comparative examples 1 to 8
Preparation of polyacrylate: the polyacrylate formulation composition is shown in Table 2 and the polymerization process is the same as in example 1.
Preparation of acrylic foam tape: the composition of the components of the acrylic foam tape was as shown in Table 2, and the specific procedure was the same as that described in example 1, with particular reference to comparative example 8, which was not applied in a plurality of applications, but was applied once and then foamed.
The foam tapes obtained were tested according to the same performance test method as in example 1.
Comparative example 9 a 0.2mm thick PE foam tape from New Africa adhesive products Co., ltd.
Comparative example 10 an acrylic foam tape of 0.2mm thick crown adhesive product limited was used.
The results of the performance test of each comparative example are shown in Table 2.
Table 2 comparative examples 1 to 10 performance test results table
From the above comparative analysis of data, it can be seen that the water drop angle of the acrylic foam without trifluoroethyl acrylate in comparative example 5 is only 96 °, after the trifluoroethyl acrylate monomer is added to the acrylic foam with the water absorption rate of 9.4%, the water drop angle is gradually increased with the increase of the addition amount, the peeling strength of 85 ℃/85% humidity is increased and then decreased, the aging rate of the peeling strength is reduced, and the humidity holding power of 85 ℃/85% is increased. Comparative example 8 was one-time coated and foamed, and the resulting acrylic foam tape had a higher water absorption, a higher VOC content, and a reduced humidity retention of 85 ℃/85% than example 1. Therefore, the high-temperature and high-humidity resistant acrylic foam adhesive tape with low VOC content can be obtained, has excellent impact absorption performance and lower water absorption rate, has better retention performance than the foam adhesive tape in the market under the environment of 85 ℃/85% humidity, has better shearing resistance, has good peel strength performance and does not have the phenomenon of adhesive residue degumming.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (11)
1. The acrylic foam adhesive tape resistant to high-temperature and high-humidity environments is characterized by comprising two layers of release films and a layer of foam, wherein the VOCs content of the foam is lower than 50g/kg.
2. The acrylic foam tape resistant to high temperature and high humidity environment according to claim 1, wherein the foam has an average cell diameter of 0.02 to 0.07mm and an average cell pitch of 0.01 to 0.05mm.
3. The acrylic foam tape resistant to high temperature and humidity environment according to claim 1, wherein the foam has a water drop angle of more than 100 ° and less than 150 °.
4. The acrylic foam tape resistant to high temperature and high humidity environment according to claim 1, wherein the peel strength aging rate X of the acrylic foam tape is not more than 15%; peel strength aging rate x= (T1-T2)/T1, T1 is unaged normal temperature peel strength, and T2 is peel strength after aging.
5. The acrylic foam tape resistant to high temperature and high humidity environment according to claim 1, wherein the foam comprises the following raw materials in parts by weight: 50-70 parts of polyacrylate resin, 5-15 parts of modified resin, 0.5-2 parts of curing agent, 0.5-2 parts of coupling agent, 0.3-1 part of antioxidant, 0.3-3 parts of foaming microsphere, 0.5-3 parts of color paste and 30-50 parts of solvent.
6. The high-temperature and high-humidity environment-resistant acrylic foam tape according to claim 5, wherein the polyacrylate resin comprises the following raw materials in parts by weight:
30-50 parts of soft monomer, 5-20 parts of hard monomer and 1-5 parts of crosslinking monomer; 2-5 parts of functional monomer; 40-60 parts of solvent; 0.1 to 1 part of free radical initiator.
7. The acrylic foam tape resistant to high temperature and high humidity environment according to claim 6, wherein,
the Tg of the soft monomer is lower than-20 ℃, and is preferably one or more of ethyl acrylate, butyl acrylate, isooctyl acrylate and lauryl acrylate;
the Tg of the hard monomer is higher than 90 ℃, and is preferably one or more of styrene, acrylonitrile and methyl methacrylate;
the crosslinking monomer is one or more of acrylic acid, methacrylic acid, N-methylolacrylamide and hydroxyethyl acrylate;
the functional monomer is a side chain fluorine-containing monomer, and the number of fluorine atoms in the side chain is 3-12;
the solvent is one or more of ethyl acetate, isopropanol, toluene and heptane;
the free radical initiator is one or more of azodiisobutyronitrile, azodiisoheptonitrile, benzoyl peroxide, diisopropyl peroxydicarbonate and dicumyl peroxide.
8. The acrylic foam tape resistant to high temperature and high humidity environments according to claim 6 or 7, wherein the preparation method of the polyacrylate resin comprises the steps of:
weighing soft monomers and 4/5 solvent in corresponding weight portions, introducing nitrogen for protection, dropwise adding 2/3 free radical initiator, 1/10 solvent and hard monomers and functional monomers in corresponding weight portions at 78-82 ℃, dropwise adding and reacting for 2-2.5h, and preserving heat for 1-1.5h;
dripping the rest 1/3 free radical initiator and 1/10 solvent, and then preserving the temperature for 3-4 hours at 76-80 ℃ to obtain the polyacrylate.
9. The acrylic foam tape resistant to high temperature and high humidity environment according to any one of claims 1 to 7,
the modified resin is one or more of rosin resin, terpene resin and terpene phenol resin, and the softening point of the resin is 120-150 ℃;
the curing agent is one or more of isocyanate curing agent, epoxy curing agent and pyridine curing agent;
the coupling agent is a silane coupling agent;
the antioxidant is one or more of 1010, 1076, 168, 618, UV928, DLTDP and 412S;
the solvent is one or more of ethyl acetate, isopropanol, toluene and heptane;
the foaming microsphere is an unexpanded foaming microsphere, and the initial foaming temperature is higher than the highest temperature of the drying temperature range.
10. The method for preparing the acrylic foam tape resistant to high temperature and high humidity environment according to any one of claims 1 to 9, comprising the steps of:
the preparation method comprises the steps of weighing polyacrylate resin, modified resin, curing agent, coupling agent, antioxidant, foaming microsphere, color paste and solvent according to parts by weight, uniformly mixing, coating the mixed resin on a release film, drying the release film through an oven, repeating the operation to obtain other layers, compounding the layers together, and then foaming.
11. The method for preparing the acrylic foam tape resistant to high temperature and high humidity environment according to claim 10, wherein the highest temperature of an oven drying temperature range is lower than the initial foaming temperature of the foaming microsphere; the highest temperature in the oven foaming temperature interval is higher than the initial foaming temperature of the foaming microsphere and lower than the rupture temperature of the foaming microsphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211727229.6A CN116042107A (en) | 2022-12-30 | 2022-12-30 | Acrylic foam adhesive tape resistant to high-temperature and high-humidity environment and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211727229.6A CN116042107A (en) | 2022-12-30 | 2022-12-30 | Acrylic foam adhesive tape resistant to high-temperature and high-humidity environment and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116042107A true CN116042107A (en) | 2023-05-02 |
Family
ID=86117840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211727229.6A Pending CN116042107A (en) | 2022-12-30 | 2022-12-30 | Acrylic foam adhesive tape resistant to high-temperature and high-humidity environment and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116042107A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116987467A (en) * | 2023-09-26 | 2023-11-03 | 太仓斯迪克新材料科技有限公司 | Compressed low-rebound high-level difference filling pressure-sensitive adhesive, pressure-sensitive adhesive tape and preparation method |
-
2022
- 2022-12-30 CN CN202211727229.6A patent/CN116042107A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116987467A (en) * | 2023-09-26 | 2023-11-03 | 太仓斯迪克新材料科技有限公司 | Compressed low-rebound high-level difference filling pressure-sensitive adhesive, pressure-sensitive adhesive tape and preparation method |
| CN116987467B (en) * | 2023-09-26 | 2023-12-15 | 太仓斯迪克新材料科技有限公司 | Compressed low-rebound high-level difference filling pressure-sensitive adhesive, pressure-sensitive adhesive tape and preparation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111072847B (en) | Polyacrylate, acrylic acid foam composition, acrylic acid foam adhesive tape and preparation method and application thereof | |
| TWI619789B (en) | Adhesive composition for touch panel, adhesive film and touch panel | |
| JP6653290B2 (en) | Double-sided adhesive sheet and portable electronic equipment | |
| EP2557135B1 (en) | Adhesive composition, adhesive sheet, and touch panel | |
| EP2385090B1 (en) | Acrylic pressure-sensitive adhesive tape | |
| KR20140019759A (en) | Double-sided pressure-sensitive adhesive sheet and portable electronic device | |
| US20130236674A1 (en) | Adhesive composition for touch panel, adhesive film, and touch panel | |
| CN109749672B (en) | UV curing heat-reducing adhesive and preparation method and application thereof | |
| EP2557486A2 (en) | Adhesive film for a touch panel, and touch panel | |
| US20190106608A1 (en) | Acrylic pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet | |
| CN110698585B (en) | High-temperature-resistant modified acrylate pressure-sensitive adhesive and preparation method thereof | |
| JP2013543912A (en) | Adhesive composition for touch panel, adhesive film and touch panel | |
| TWI642752B (en) | Double-sided adhesive tape for carrying electronic equipment | |
| JP6013092B2 (en) | Double-sided adhesive sheet | |
| CN116042107A (en) | Acrylic foam adhesive tape resistant to high-temperature and high-humidity environment and preparation method thereof | |
| KR20100025219A (en) | Manufacturing method of liquid crystal display device | |
| CN115612434A (en) | Low-temperature-resistant acrylate pressure-sensitive adhesive and preparation method thereof | |
| CN111171767A (en) | Optical adhesive of curable (methyl) acrylate copolymer and preparation method of substrate-free OCA pressure-sensitive adhesive tape | |
| JP2016175984A (en) | Double-sided adhesive tape | |
| CN114410236A (en) | Low-temperature impact resistant acrylic acid foam adhesive tape and preparation method thereof | |
| KR20120056175A (en) | Pressure-sensitive adhesive composition for touch panel, pressure-sensitive adhesive film and touch panel | |
| CN116769219A (en) | Shock-resistant foam double-sided adhesive tape based on acrylic resin foaming | |
| EP2706100A1 (en) | Double-sided pressure-sensitive adhesive sheet | |
| CN117050696A (en) | Modified polyacrylate pressure-sensitive adhesive for folding adhesive tape and preparation method thereof | |
| US20190161651A1 (en) | Pressure-sensitive adhesive sheet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |