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Environment-friendly strippable pressure-sensitive adhesive for surface protective film

A surface protection film, environmentally friendly technology, applied in the field of pressure-sensitive adhesives, can solve problems such as foam control, and achieve the effect of improving water resistance, low price, and good UV stability

Inactive Publication Date: 2012-08-15
SHANGHAI ZHONGXIN YUXIANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing commercially available acrylic PSAs use phosphorus-based surfactants as peel control agents, but problems with foam control occur when using such surfactants (see US 5416134)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Dissolve 7g of polyvinyl alcohol, 0.8g of sodium dodecylsulfonate, and 1.8g of alkylphenol polyoxyethylene ether in 140mL of pure water, add sodium bicarbonate to adjust the pH value to 5-6, and heat up to 50°C , add 105g butyl acrylate, 11g isooctyl acrylate, 5g hydroxypropyl acrylate, 1.6g acrylic acid, 30.4g vinyl acetate, 3.6g N-methylolacrylamide and 0.44g n-dodecyl mercaptan, 60℃ React for 1 hour to obtain a pre-emulsion;

[0025] 2) Dissolve 0.44g of ammonium persulfate in 3.6mL of pure water, mix 25% of the pre-emulsion with 40% of the ammonium persulfate solution, heat up to 80°C, stir and reflux, and start adding the remaining pre-emulsion dropwise when the liquid turns blue. Emulsion, and add 20% ammonium persulfate solution every 1h, add dropwise within 3h, and finally add the remaining ammonium persulfate solution, and keep warm and reflux at 90°C for 1h;

[0026] 3) After cooling the above reaction solution to 40°C, add 3g of DJJL-02 dropwise, mix well...

Embodiment 2

[0028] 1) Dissolve 7g of polyvinyl alcohol, 0.8g of sodium dodecylsulfonate, and 1.8g of alkylphenol polyoxyethylene ether in 140mL of pure water, add sodium bicarbonate to adjust the pH value to 5-6, and heat up to 50°C , add 105g butyl acrylate, 11g isooctyl acrylate, 5g hydroxypropyl acrylate, 1.6g acrylic acid, 30.4g vinyl acetate, 3.6g N-methylol acrylamide and 0.44g n-dodecyl mercaptan, 62°C React for 1 hour to obtain a pre-emulsion;

[0029] 2) Dissolve 0.44g of ammonium persulfate in 3.6mL of pure water, mix 25% of the pre-emulsion with 40% of the ammonium persulfate solution, heat up to 82°C, stir and reflux, and start adding the remaining pre-emulsion dropwise when the liquid turns blue. Emulsion, and add 20% ammonium persulfate solution every 1h, add dropwise within 3h, and finally add the remaining ammonium persulfate solution, and keep warm and reflux at 90°C for 1h;

[0030] 3) After cooling the above reaction solution to 40°C, add 3g of DJJL-02 dropwise and mix...

Embodiment 3

[0032] 1) Dissolve 7g of polyvinyl alcohol, 0.8g of sodium dodecylsulfonate, and 1.8g of alkylphenol polyoxyethylene ether in 140mL of pure water, add sodium bicarbonate to adjust the pH value to 5-6, and heat up to 50°C , add 105g butyl acrylate, 11g isooctyl acrylate, 5g hydroxypropyl acrylate, 1.6g acrylic acid, 30.4g vinyl acetate, 3.6g N-methylolacrylamide and 0.44g n-dodecyl mercaptan, 60℃ React for 1 hour to obtain a pre-emulsion;

[0033] 2) Dissolve 0.44g of ammonium persulfate in 3.6mL of pure water, mix 25% of the pre-emulsion with 40% of the ammonium persulfate solution, heat up to 80°C, stir and reflux, and start adding the remaining pre-emulsion dropwise when the liquid turns blue. Emulsion, and add 20% ammonium persulfate solution every 1h, dropwise within 3h, and finally add the remaining ammonium persulfate solution, and keep warm and reflux at 90°C for 1.5h;

[0034] 3) After cooling the above reaction solution to 40°C, add 3g of DJJL-02 dropwise and mix wel...

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PUM

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Abstract

The invention relates to an environment-friendly strippable pressure-sensitive adhesive for a surface protective film. A preparation method of the environment-friendly strippable pressure-sensitive adhesive comprises the following steps: (1) taking water as solvent, uniformly mixing polyvinyl alcohol, anionic surfactant, emulsifier and pH regulator, increasing temperature to 50 DEG C, and adding acrylic monomer, cross-linking monomer and polymerization degree regulator to react for 1h at the temperature of 60-65 DEG C, thus obtaining a pre-emulsified solution; (2) uniformly mixing 25% of pre-emulsified solution with 40% of initiator, increasing temperature to 80-85 DEG C, adding the rest of pre-emulsified solution when the liquid turns blue, adding 20% of initiator every 1h so as to drip off all initiator within 3h, at last replenishing surplus initiator, and refluxing while keeping the temperature to be 90 DEG C for 1-1.5h; and (3) lowering the temperature of the reaction liquid to 40 DEG C, adding a bridging agent, uniformly mixing the mixture, and then cooling the mixture to room temperature. With the advantages of excellent water resistance, no adhesive residue and the like, the environment-friendly strippable pressure-sensitive adhesive is especially applicable to the surface protective film of a display screen and can avoid the pollution of solvent type pressure-sensitive adhesive to environment.

Description

technical field [0001] The invention relates to a pressure-sensitive adhesive, in particular to an environment-friendly peelable pressure-sensitive adhesive used for a surface protection film. Background technique [0002] Pressure-sensitive adhesive is the abbreviation of pressure-sensitive adhesive. It is a kind of adhesive that is sensitive to pressure. It has a wide range of applications and can be used in surface protective films, double-sided tapes, labels, packaging, wallpapers, etc. Among them, the surface protective film is a special protective material, which is pasted on the surface of various metal plates, plastic plates or glass to protect the fine surface of the article during transportation, processing, storage and use, which requires High performance pressure sensitive adhesive. [0003] Pressure-sensitive adhesives can be divided into rubber type and resin type according to the main resin composition, among which rubber type can be divided into natural rubb...

Claims

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Application Information

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IPC IPC(8): C09J133/08C09J11/08C08F220/18C08F220/28C08F218/08C08F220/06C08F220/58C08F2/30C08F2/26C08F2/38
Inventor 曹祥来孔庆茹乔毅
Owner SHANGHAI ZHONGXIN YUXIANG CHEM
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