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CN-122011958-A - Impact-resistant base-material-free adhesive protection tape and preparation method thereof

CN122011958ACN 122011958 ACN122011958 ACN 122011958ACN-122011958-A

Abstract

The invention relates to the technical field of pressure-sensitive adhesives, in particular to an impact-resistant base-material-free adhesive protection tape and a preparation method thereof. The adhesive tape prepared by the invention has better functions of buffering resistance and energy absorption, has certain flexibility, namely compression performance, and cannot cause physical injury to a use part due to excessive rigidity, so as to face the influence of large-amplitude impact or small-amplitude long-time impact in a use scene.

Inventors

  • Zhu Bizhi
  • Zhou Kuiren

Assignees

  • 苏州世华新材料科技股份有限公司

Dates

Publication Date
20260512
Application Date
20241031

Claims (10)

  1. 1. The preparation method of the impact-resistant base-material-free adhesive protection tape is characterized by comprising the following substances: Mixed solvent, hard monomer, soft monomer, functional monomer, initiator, tackifying resin and curing agent; wherein the mass ratio of the hard monomer to the soft monomer is 4:6; the mixed solvent comprises ethyl acetate, butyl acetate and n-heptane in a mass ratio of 5:2:1.
  2. 2. The method for preparing an impact-resistant base-free adhesive protective tape according to claim 1, wherein the hard monomer comprises at least one of methyl acrylate, furan acrylate, isobornyl methacrylate, cyclohexyl methacrylate, methyl bicyclodecane acrylate and methyl methacrylate.
  3. 3. The method for preparing an impact-resistant base-free adhesive protective tape according to claim 1, wherein the soft monomer is at least one of isobutyl acrylate, n-heptyl acrylate, beta-hydroxypropyl methacrylate and 2-ethylhexyl acrylate.
  4. 4. The method for preparing an impact-resistant base-free adhesive protective tape according to claim 1, wherein the functional monomer is at least one of acetoacetate methacrylate, dimethylaminoethyl methacrylate, maleic anhydride, methyl methacrylate, methacrylamide and hydroxyethyl acrylate.
  5. 5. The method for preparing an impact-resistant base-free adhesive protective tape according to claim 1, wherein the initiator is at least one of azobisisobutyronitrile, azobisisoheptonitrile and dibenzoyl peroxide.
  6. 6. The method for preparing the impact-resistant base-free adhesive protection tape according to claim 1, wherein the tackifying resin is modified terpene resin, modified rosin resin or a mixture of the modified terpene resin and the modified rosin resin, and the curing agent is isocyanate.
  7. 7. The method for preparing the impact-resistant base-free adhesive protection tape according to claim 1, which is characterized by comprising the following steps: s1, preparing a mixed monomer Adding the mixed solvent into a four-neck reaction kettle, regulating the temperature to 65 ℃, adding quantitative hard monomers, soft monomers and the mixed monomers into the mixed solvent, stirring for 2 hours, cooling to room temperature, wherein the solid content of the mixed monomers is 45%, and the total part is 90 parts; S2, preparation of acrylic copolymer Using a 1L four-neck flask, regulating the water bath temperature to 55-60 ℃, introducing protective gas such as nitrogen for 10min, taking out 30 parts of the mixed monomer solution prepared in the step S1, and adding 0.5 part of azodiisobutyronitrile, 0.5 part of azodiisoheptonitrile and 0.1 part of dibenzoyl peroxide as an initiator; After the reaction is carried out for 30min, the rest mixed monomers are continuously added twice, 30 parts of mixed monomers are added each time, and the reaction is carried out for 30min each time; And finally, adding 30 parts of mixed monomers, adding 1 part of azodiisobutyronitrile, 1 part of azodiisoheptonitrile and 0.2 part of dibenzoyl peroxide, heating to 65-70 ℃, controlling the dropping speed to 5 parts/1 min, keeping the temperature for 3 hours, continuously introducing protective gas in the process, and then refluxing and cooling to room temperature, wherein the solid content is 43%; S3, pouring the product obtained in the step S2 back into the reaction kettle again, adjusting the temperature to 50-60 ℃ and the stirring speed to 300r/min, adding 10 parts of modified terpene resin and modified rosin resin which are dissolved in butyl acetate in advance into the reaction kettle, continuously stirring for 1h, and cooling to room temperature to obtain the polyacrylic acid adhesive; S4, taking the polyacrylic acid adhesive prepared in the step S3, using heptane and butyl ester as solvents, regulating the solid content to 20-30%, stirring for 30min at the speed of 1000r/min, adding a quantitative curing agent and epoxy resin, and stirring for 30min at the speed of 1000r/min to obtain a glue finished product.
  8. 8. The method for preparing an impact-resistant base-free adhesive protective tape according to claim 7, wherein the hard monomer comprises 5 parts of methyl acrylate, 5 parts of furan acrylate, 5 parts of isobornyl methacrylate, 10 parts of cyclohexyl methacrylate, 2 parts of methyl bicyclodecane acrylate and 3 parts of methyl methacrylate; the soft monomer comprises 10 parts of ethyl acrylate, 15 parts of butyl acrylate and 20 parts of 2-ethylhexyl acrylate The functional monomers comprise 1.5 parts of acetoacetic acid ethyl ester methacrylate, 2.5 parts of dimethylaminoethyl methacrylate, 3 parts of maleic anhydride and 5 parts of methyl methacrylate; The mixed solvent comprises 12.5 parts of butyl acetate, 6.25 parts of n-heptane and 31.25 parts of ethyl acetate.
  9. 9. The method for preparing the impact-resistant base-free adhesive protection tape according to claim 7, wherein isocyanate accounts for 0.4-1.0% of the total mass of the adhesive, epoxy resin accounts for 0.4-2.0% of the total mass of the adhesive, and functional resins with different softening points are added in the step S4 to account for 0.4-1.0% of the total mass of the adhesive.
  10. 10. The impact-resistant base-free adhesive protective tape according to claim 1, wherein the impact-resistant base-free adhesive protective tape is prepared by any one of the methods of preparing impact-resistant base-free adhesive protective tapes according to claims 1 to 9.

Description

Impact-resistant base-material-free adhesive protection tape and preparation method thereof Technical Field The invention relates to the technical field of pressure-sensitive adhesives, in particular to an impact-resistant base-material-free adhesive protection tape and a preparation method thereof. Background The adhesive tape is widely applied to assembly among components and daily life, is an indispensable material in industrial manufacture and electronic assembly, has higher and higher performance requirements on the adhesive tape along with technical development, particularly in the current electronic communication industry, has higher and higher performance requirements on electronic devices such as mobile phones and tablet computers with precise electronic elements due to high price and precise performance requirements, and has higher and higher suitability requirements on the electronic product devices which are convenient and easy to carry along with the development of more and more outdoor exercises, and has particularly outstanding impact resistance. With the development of technology, people tend to use large-screen models, whether mobile phones or tablet computers, the size of the screen occupied by the whole body is larger, and the demands of the mobile phones and the tablet display modules are higher. Therefore, the tape suppliers of the display modules of the mobile phones are also provided with new challenges. The buffer area is needed to be added between the structural design of the display module behind the mobile phone screen and the control circuit behind the mobile phone screen, the buffer area is used for avoiding that under the action of external force, when the front or the back of the mobile phone is impacted, the impact force needs to be absorbed by the buffer material in the buffer area when the impact force reaches the display module area, and the damage of the display module inside the mobile phone caused by the excessive impact force is prevented, so that the buffer performance of the buffer area material is important. The cushioning materials used in most cell phones and tablets have been foam, which has been widely used for its porous, loose and resilient properties. For example, chinese patent publication No. CN107502217a discloses an ultrathin cellular phone screen foam adhesive tape, which is composed of a PU elastic layer, a printing layer, a PET layer and an acrylic pressure-sensitive adhesive layer, wherein the printing layer is disposed on the upper surface of the PET layer, the acrylic pressure-sensitive adhesive layer is coated on the lower surface of the PET layer, the printing layer, the PET layer and the acrylic pressure-sensitive adhesive layer form a mesh structure, the PU elastic layer is disposed on the upper surface of the mesh structure, and the PU elastic layer is filled with foam material. However, the present finding that the foam is easy to be broken and broken after being used for many times, and the buffer performance is seriously affected, so that the foam is replaced by a soft and tough new scheme to play a role in buffering and effectively avoid the material breaking caused by long-term compression. In order to solve the problems, the invention provides an impact-resistant base material-free adhesive protection tape and a preparation method thereof. Disclosure of Invention The invention aims to provide an impact-resistant base-free adhesive protection tape and a preparation method thereof, which are used for solving the problems in the background technology. In order to solve the technical problems, the invention provides the following technical scheme: a preparation method of an impact-resistant base-free adhesive protection tape comprises the following substances: Mixed solvent, hard monomer, soft monomer, functional monomer, initiator, tackifying resin and curing agent; wherein the mass ratio of the hard monomer to the soft monomer is 4:6; the mixed solvent comprises ethyl acetate, butyl acetate and n-heptane in a mass ratio of 5:2:1. More preferably, the hard monomer comprises at least one of methyl acrylate, furan acrylate, isobornyl methacrylate, cyclohexyl methacrylate, methyl bicyclodecane acrylate, and methyl methacrylate. More preferably, the soft monomer is at least one of isobutyl acrylate, n-heptyl acrylate, beta-hydroxypropyl methacrylate and 2-ethylhexyl acrylate. More preferably, the functional monomer is at least one of acetoacetic acid ethyl methacrylate, dimethylaminoethyl methacrylate, maleic anhydride, methyl methacrylate, methacrylamide and hydroxyethyl acrylate. More preferably, the initiator is at least one of azobisisobutyronitrile, azobisisoheptonitrile and dibenzoyl peroxide. Preferably, the tackifying resin is modified terpene resin, modified rosin resin or a mixture of the modified terpene resin and the modified rosin resin, and the curing agent is isocyanate. More preferably, the preparation method comprises the follow