阅读说明：本技术 一种高性能丙烯酸发泡体胶带及其制备方法 (High-performance acrylic acid foaming body adhesive tape and preparation method thereof ) 是由 方友 于 2020-05-06 设计创作，主要内容包括：本发明涉及泡棉胶带技术领域,具体涉及一种高性能丙烯酸发泡体胶带及其制备方法,该胶带包括由上至下依次贴合的第一保护膜、第一胶层、丙烯酸发泡体层、第二胶层和第二保护膜,所述第一保护膜和第二保护膜均为离型膜,所述第一胶层和第二胶层均为丙烯酸压敏胶层,所述丙烯酸压敏胶层由丙烯酸压敏胶制得,所述丙烯酸发泡体层包括如下重量份的原料：预聚体20-30份、丙烯酸增粘树脂60-70份、活性稀释单体3-8份、光引发剂1.0-1.5份、玻璃球微珠粉3-6份。该胶带不仅能使防水性能达到IP68级,而且抗紫外线、耐高低温和抗老化性能更好,具备超高剥离力,优异的动态剪切性能,对低表面能材质有优异的粘接性能。(The invention relates to the technical field of foam tapes, in particular to a high-performance acrylic acid foaming body tape and a preparation method thereof, wherein the tape comprises a first protective film, a first adhesive layer, an acrylic acid foaming body layer, a second adhesive layer and a second protective film which are sequentially attached from top to bottom, the first protective film and the second protective film are release films, the first adhesive layer and the second adhesive layer are acrylic acid pressure-sensitive adhesive layers, the acrylic acid pressure-sensitive adhesive layers are prepared from acrylic acid pressure-sensitive adhesives, and the acrylic acid foaming body layer comprises the following raw materials in parts by weight: 20-30 parts of prepolymer, 60-70 parts of acrylic tackifying resin, 3-8 parts of active diluent monomer, 1.0-1.5 parts of photoinitiator and 3-6 parts of glass bead powder. The adhesive tape can not only enable the waterproof performance to reach IP68 level, but also has better ultraviolet resistance, high and low temperature resistance and aging resistance, ultrahigh peeling force, excellent dynamic shear performance and excellent adhesive property to low surface energy materials.)

1. A high-performance acrylic foam adhesive tape characterized in that: including first protection film, first glue film, acrylic acid foaming body layer, second glue film and the second protection film of laminating in proper order from top to bottom, first protection film and second protection film are from the type membrane, first glue film and second glue film are acrylic acid pressure sensitive adhesive layer, acrylic acid pressure sensitive adhesive layer is made by acrylic acid pressure sensitive adhesive, acrylic acid foaming body layer includes the raw materials of following parts by weight:

2. the high performance acrylic foam tape of claim 1, wherein: the prepolymer is a polyurethane acrylate prepolymer; the reactive diluent monomer is at least one of methoxy polyethylene glycol, ethylene glycol diacrylate and acrylic acid; the photoinitiator is at least one of 4-acryloxybenzophenone, 2-hydroxy-2-methyl-1-phenyl-1-acetone and 1-hydroxycyclohexyl phenyl ketone.

3. The high performance acrylic foam tape of claim 1, wherein: each part of the acrylic tackifying resin comprises the following raw materials in parts by weight:

4. the high performance acrylic foam tape of claim 3, wherein: the preparation method of the acrylic tackifying resin comprises the following steps:

s1, weighing the raw materials in parts by weight for later use;

s2, stirring isooctyl acrylate, acrylic acid, methyl methacrylate, N-dimethylacrylamide and 4-acryloyloxybenzophenone uniformly, reacting under the irradiation of ultraviolet light until the viscosity reaches 3000-.

5. The high performance acrylic foam tape of claim 1, wherein: the acrylic pressure-sensitive adhesive comprises the following raw materials in parts by weight:

6. the high performance acrylic foam tape of claim 5, wherein: each part of the acrylic pressure-sensitive adhesive comprises the following raw materials in parts by weight:

7. the high performance acrylic foam tape of claim 6, wherein: the soft monomer is at least one of ethyl acrylate, butyl acrylate and isooctyl acrylate; the functional monomer is at least one of hydroxyethyl acrylate, acrylic acid and methacrylic acid; the hard monomer is at least one of vinyl acetate, methyl acrylate and methyl methacrylate; the initiator is tert-butyl peroxypivalate; the solvent is ethyl acetate, toluene or butanone.

8. The high performance acrylic foam tape of claim 6, wherein: the special monomer is prepared from trimethylolpropane monoallyl ether and di-trimethylolpropane according to the weight ratio of 1-5: 2-4, and mixing.

9. The high performance acrylic foam tape of claim 5, wherein: the preparation method of the acrylic pressure-sensitive adhesive comprises the following steps: weighing the acrylic pressure-sensitive adhesive, the petroleum resin, the rosin resin, the curing agent and the antioxidant in parts by weight, and uniformly stirring to obtain the acrylic pressure-sensitive adhesive.

10. A method for preparing the high performance acrylic foam tape according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:

A. preparation of acrylic foam layer:

a1, weighing the prepolymer, the acrylic tackifying resin, the photoinitiator, the active diluent monomer and the glass bead powder in parts by weight, mixing uniformly, and filtering to obtain a mixture;

a2, taking a base film, coating the mixture on the surface of the base film, and tearing off the base film after ultraviolet irradiation to obtain an acrylic acid foaming layer;

B. preparing an acrylic pressure-sensitive adhesive layer: coating the acrylic pressure-sensitive adhesive on the surface of a release film, and drying at the temperature of 100-120 ℃ to form an acrylic pressure-sensitive adhesive layer;

C. preparing a high-performance acrylic foam adhesive tape: and C, attaching the acrylic pressure-sensitive adhesive layer prepared in the step B to the front side and the back side of the acrylic foaming layer prepared in the step A2, and curing at the temperature of 45-55 ℃ for 45-55 hours to obtain the high-performance acrylic foaming body adhesive tape.

Technical Field

The invention relates to the technical field of foam tapes, in particular to a high-performance acrylic acid foaming body tape and a preparation method thereof.

Background

The traditional foam adhesive tape mainly comprises a Polyethylene (PE) foam adhesive tape, a Polyurethane (PU) foam adhesive tape and a vinyl acetate (EVA) foam adhesive tape, is widely applied to the digital electronic industry, the automobile industry, the household appliance industry, the building elevator industry, various audio and video equipment toys and the like, and has the advantages of sealing property, shock absorption property, compression resistance, rebound resistance and conformability. However, the conventional foam rubber belt has poor waterproof performance, ultraviolet resistance, high and low temperature resistance and ageing resistance.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the closed-cell high-performance acrylic foam adhesive tape which not only can enable the waterproof performance to reach IP68 grade, but also has better ultraviolet resistance, high and low temperature resistance and aging resistance.

The invention also aims to provide a preparation method of the high-performance acrylic acid foaming body adhesive tape, which is simple to operate, convenient to control, high in production efficiency, low in production cost and applicable to large-scale production.

The purpose of the invention is realized by the following technical scheme: the utility model provides a high performance acrylic acid foaming body sticky tape, includes first protection film, first glue film, acrylic acid foaming body layer, second glue film and the second protection film of laminating in proper order from top to bottom, first protection film and second protection film are from the type membrane, first glue film and second glue film are acrylic acid pressure sensitive adhesive layer, acrylic acid pressure sensitive adhesive layer is made by acrylic acid pressure sensitive adhesive, acrylic acid foaming body layer includes the raw materials of following part by weight:

according to the high-performance acrylic acid foaming body adhesive tape, the acrylic acid foaming body layer is based on the prepolymer and the acrylic acid tackifying resin, the active diluent monomer, the photoinitiator and the glass bead powder are added to foam in a closed-cell manner without solvent to form foam, so that the loose foam caused by open-cell foaming is avoided, the air blocking performance and the waterproof performance of the acrylic acid foaming body layer are improved, the IP 68-level waterproof capability is achieved, and the ultraviolet resistance, the high-low temperature resistance and the aging resistance are better; the acrylic acid foaming layer and the acrylic acid pressure-sensitive adhesive layer have good compatibility, and the adhesion between the acrylic acid foaming layer and the acrylic acid pressure-sensitive adhesive layer is improved. Further, the glass bead powder is FN-80 GSD manufactured by Songbu oil and fat pharmacy Co., Ltd, the thermal expansion rate at 120 ℃ is 220%, the expansion starting temperature is 100-110 ℃, the maximum expansion temperature is 125-135 ℃, and the particle size before expansion is 6-10 μm. The release film is a PET double-sided release film or a PE double-sided release film.

Preferably, the prepolymer is a polyurethane acrylate prepolymer; the reactive diluent monomer is at least one of methoxy polyethylene glycol, ethylene glycol diacrylate and acrylic acid; the photoinitiator is at least one of 4-acryloxybenzophenone, 2-hydroxy-2-methyl-1-phenyl-1-acetone and 1-hydroxycyclohexyl phenyl ketone.

By adopting the technical scheme, the acrylic acid foaming body layer of the polyurethane acrylate prepolymer is adopted, so that the stress in the adhesive tape can be effectively dissipated through the mechanical relaxation of the adhesive tape, the problem of stress concentration can not be caused, and the low-surface-energy material can be effectively adhered and protected. Further, the reactive diluent monomer is one or two of methoxy polyethylene glycol, ethylene glycol diacrylate and acrylic acid; the photoinitiator is one or two of 4-acryloxy benzophenone, 2-hydroxy-2-methyl-1-phenyl-1-acetone and 1-hydroxycyclohexyl phenyl ketone. More preferably, the reactive diluent monomer is methoxy polyethylene glycol and ethylene glycol diacrylate in a weight ratio of 1-3: 1, and the photoinitiator is 2-hydroxy-2-methyl-1-phenyl-1-acetone and 1-hydroxycyclohexyl phenyl ketone according to the weight ratio of 2-5: 1, the reactive diluent monomer is matched with the photoinitiator, and the using amount of the reactive diluent monomer is controlled to be 3-8 parts, so that the curing effect of the acrylic acid foaming layer can be improved, the curing time is shortened, and the ultraviolet aging resistance of the acrylic acid foaming layer is improved.

Preferably, each part of the acrylic tackifying resin comprises the following raw materials in parts by weight:

preferably, the preparation method of the acrylic tackifying resin comprises the following steps:

s1, weighing the raw materials in parts by weight for later use;

s2, stirring isooctyl acrylate, acrylic acid, methyl methacrylate, N-dimethylacrylamide and 4-acryloyloxybenzophenone uniformly, reacting under the irradiation of ultraviolet light until the viscosity reaches 3000-.

The acrylic tackifying resin prepared by the technical scheme is added into the acrylic foaming body layer to act together with the polyurethane acrylate prepolymer, so that the bonding strength and the cohesion of the acrylic foaming body layer are improved, and the buffering effect is achieved, so that the whole adhesive tape can effectively dissipate the stress in the adhesive tape through the mechanical relaxation of the adhesive tape. In the step S2, ultraviolet light irradiation reaction is carried out to obtain acrylic tackifying resin with the viscosity of 3000-5000cps and the pH value of 6-7, so that the acrylic tackifying resin is conveniently added into the raw materials of the acrylic foaming layer to participate in the reaction, and the raw materials of the acrylic foaming layer are conveniently stirred and mixed; further, the stirring speed is 150 r/min; the ultraviolet irradiation is carried out for 20-40min under the power of 15-20W, and then the ultraviolet irradiation is carried out under the power of 25-35W until the viscosity reaches 3000-5000cps and the pH value reaches 6-7, so that the reaction degree of the acrylic tackifying resin is favorably controlled, and the viscosity of the acrylic tackifying resin is controlled to 3000-5000cps and the pH value is controlled to 6-7; the filtration is performed by adopting a 300-400-mesh filter screen to remove the caking impurities in the acrylic tackifying resin, so that the caking impurities are prevented from being mixed into the acrylic foaming body layer to influence the performance.

Preferably, the acrylic pressure-sensitive adhesive comprises the following raw materials in parts by weight:

further, the petroleum resin is C5/C9 petroleum tackifying resin selected from YH-1288S or YUEN LIANG SK-120; the rosin resin is modified rosin tackifying resin and is selected from TP-7042 or TAMANOL 803L; the curing agent is selected from DESMODUR L-75; the antioxidant is selected from LRGANOX 1010. The acrylic pressure-sensitive adhesive layer made of the acrylic pressure-sensitive adhesive is attached to the acrylic foaming body layer, so that the problems of poor waterproof performance and poor ultraviolet resistance of the traditional foam adhesive tape are solved, and the acrylic pressure-sensitive adhesive tape has ultrahigh peeling force, excellent dynamic shearing performance and excellent adhesive property on low-surface-energy materials. The high-performance acrylic acid foaming body adhesive tape is soft as a whole and has excellent conformability and anti-rebound performance.

Preferably, each part of the acrylic pressure-sensitive adhesive comprises the following raw materials in parts by weight:

preferably, the soft monomer is at least one of ethyl acrylate, butyl acrylate and isooctyl acrylate; the functional monomer is at least one of hydroxyethyl acrylate, acrylic acid and methacrylic acid; the hard monomer is at least one of vinyl acetate, methyl acrylate and methyl methacrylate; the initiator is tert-butyl peroxypivalate; the solvent is ethyl acetate, toluene or butanone. Further, the preparation method of the acrylic pressure-sensitive adhesive comprises the following steps: mixing an initiator and a part of solvent to prepare an initiator solution with the concentration of 6.6 wt%, uniformly stirring a soft monomer, a functional monomer, a hard monomer, a special monomer and the rest solvent at the rotating speed of 120r/min, heating to 72-75 ℃, adding the initiator solution while stirring, reacting for 2.5-3.0h, and preserving heat at the temperature of 65-70 ℃ for 3h to obtain the acrylic pressure-sensitive adhesive.

By adopting the technical scheme, the prepared acrylic pressure-sensitive adhesive has high and low temperature resistance, provides initial adhesion, stripping force and cohesion, is mixed with petroleum resin, rosin resin, a curing agent and an antioxidant according to a specific proportion and fully reacts, so that the acrylic pressure-sensitive adhesive layer has ultrahigh stripping force, excellent dynamic shearing performance and excellent bonding performance on low-surface-energy materials. Further, the soft monomer is prepared from butyl acrylate and isooctyl acrylate according to a weight ratio of 26-30: 11-15, further improving the stripping force and initial adhesion of the acrylic pressure-sensitive adhesive; the hard monomer is vinyl acetate and methyl methacrylate, and the weight ratio is 3-6: 1-2, and further improving the cohesive force of the acrylic pressure-sensitive adhesive. The functional monomer is acrylic acid and provides a crosslinking point for the acrylic pressure-sensitive adhesive.

Preferably, the special monomer is prepared by mixing trimethylolpropane monoallyl ether and ditrimethylolpropane in a weight ratio of 1-5: 2-4, and mixing.

The special monomers mixed according to the specific proportion are adopted, so that the weather resistance and the temperature resistance of the acrylic pressure-sensitive adhesive are improved.

Preferably, the preparation method of the acrylic pressure-sensitive adhesive comprises the following steps: weighing the acrylic pressure-sensitive adhesive, the petroleum resin, the rosin resin, the curing agent and the antioxidant in parts by weight, and uniformly stirring to obtain the acrylic pressure-sensitive adhesive. Furthermore, the rotation speed of the stirring is 500-800r/min, so that the raw material mixing is promoted, and the solidification caused by overhigh rotation speed is avoided.

The invention relates to a high-performance acrylic acid foaming body adhesive tape, which adopts a closed-cell acrylic acid foaming body layer produced by a unique solvent-free manufacturing technology, wherein an acrylic acid pressure sensitive adhesive layer is adhered on the surface of the closed-cell acrylic acid foaming body layer. The acrylic pressure-sensitive adhesive layer and the acrylic foam layer are both formed by polyacrylate viscoelastic bodies, and by utilizing the unique structure, the special structure endows the adhesive tape with special overall viscoelasticity, the whole adhesive tape can effectively dissipate stress in the adhesive tape through mechanical relaxation of the adhesive tape, and stress concentration cannot be caused, so that the adhesive tape can effectively adhere and protect materials, and the acrylic foam layer is of a closed-cell structure and has excellent air and water blocking performance.

The other purpose of the invention is realized by the following technical scheme: the preparation method of the high-performance acrylic acid foaming body adhesive tape comprises the following steps:

A. preparation of acrylic foam layer:

a1, weighing the prepolymer, the acrylic tackifying resin, the photoinitiator, the active diluent monomer and the glass bead powder in parts by weight, mixing uniformly, and filtering to obtain a mixture;

a2, taking a base film, coating the mixture on the surface of the base film, and tearing off the base film after ultraviolet irradiation to obtain an acrylic acid foaming layer;

B. preparing an acrylic pressure-sensitive adhesive layer: coating the acrylic pressure-sensitive adhesive on the surface of a release film, and drying at the temperature of 100-120 ℃ to form an acrylic pressure-sensitive adhesive layer;

C. preparing a high-performance acrylic foam adhesive tape: and C, attaching the acrylic pressure-sensitive adhesive layer prepared in the step B to the front side and the back side of the acrylic foaming layer prepared in the step A2, and curing at the temperature of 45-55 ℃ for 45-55 hours to obtain the high-performance acrylic foaming body adhesive tape.

The preparation method of the high-performance acrylic acid foaming body adhesive tape comprises the steps of preparing the acrylic acid foaming body layer and the acrylic acid pressure-sensitive adhesive layer respectively, attaching the acrylic acid foaming body layer and the acrylic acid pressure-sensitive adhesive layer together, and curing to obtain the high-performance acrylic acid foaming body adhesive tape, so that the control is convenient, and the waterproof effect is prevented from being reduced due to secondary foaming of the acrylic acid foaming body layer. Further, in the step A1, the mixing is performed by stirring at a rotation speed of 300r/min of 150-. In the step A2, the ultraviolet light irradiation power is 50-100W, and the irradiation time is 10-20 min. In the step B, the coating thickness of the acrylic pressure-sensitive adhesive is 30-70 μm. The base film is a PET release film.

The invention has the beneficial effects that: the high-performance acrylic acid foaming body adhesive tape not only can enable the waterproof performance to reach IP68 level, but also has better ultraviolet resistance, high and low temperature resistance and ageing resistance.

The preparation method of the high-performance acrylic acid foaming body adhesive tape is simple to operate, convenient to control, high in production efficiency, low in production cost and capable of being used for large-scale production.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention.

The reference signs are: 1. a first protective film; 2. a first glue layer; 3. an acrylic foam layer; 4. a second adhesive layer; 5. and a second protective film.

Detailed Description

For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.