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Hexahydroxy copolymer water-based pressure-sensitive adhesive without adhesive residue and preparation method of hexahydroxy copolymer water-based pressure-sensitive adhesive

A six-component copolymerization water-based, pressure-sensitive adhesive technology, applied in the field of pressure-sensitive adhesives, can solve problems such as foam control

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, 0.9g of sodium dodecylsulfonate, and 1.8g of alkylphenol polyoxyethylene ether in 140mL of pure water, add sodium bicarbonate to adjust the pH to 5-6, then 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 4g of DJJL-02 dropwise, mix well and ...

Embodiment 2

[0028] 1) Dissolve 7g of polyvinyl alcohol, 0.9g of sodium dodecylsulfonate, and 1.8g of alkylphenol polyoxyethylene ether in 140mL of pure water, add sodium bicarbonate to adjust the pH to 5-6, then 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 4g of DJJL-02 dropwise, mix well an...

Embodiment 3

[0032] 1) Dissolve 7g of polyvinyl alcohol, 0.9g of sodium dodecylsulfonate, and 1.8g of alkylphenol polyoxyethylene ether in 140mL of pure water, add sodium bicarbonate to adjust the pH to 5-6, then 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 4g of DJJL-02 dropwise, mix well and co...

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Abstract

The invention relates to a hexahydroxy copolymer water-based pressure-sensitive adhesive without adhesive residue and a preparation method of the hexahydroxy copolymer water-based pressure-sensitive adhesive. The preparation method of the hexahydroxy copolymer water-based 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 the 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 the initiator within 3h, at last replenishing surplus initiator, and keeping temperature for reflux for 1-1.5h at the temperature of 90 DEG C; and (3) lowering the temperature of the reaction liquid to 40 DEG C, adding a bridging agent, and after uniformly mixing the mixture, cooling the mixture to room temperature. The hexahydroxy copolymer water-based pressure-sensitive adhesive has the advantages of low price, high production rate, strippability and the like and can avoid the pollution of solvent type pressure-sensitive adhesive to environment, thus being an environment-friendly water-based strippable pressure-sensitive adhesive.

Description

technical field [0001] The invention relates to a pressure-sensitive adhesive, in particular to a six-component copolymerized water-based pressure-sensitive adhesive without adhesive residue and a preparation method thereof. Background technique [0002] Pressure-sensitive adhesive, the abbreviation of pressure-sensitive adhesive, is a type of adhesive that is sensitive to pressure and is mainly used to prepare pressure-sensitive tapes. The peeling force of the general pressure-sensitive adhesive (the peeling force exhibited by the adhesive tape and the surface to be adhered after pressure) should be smaller than the cohesive force of the adhesive (the force between the molecules of the pressure-sensitive adhesive), and smaller than the sticking force of the adhesive ( Adhesion between adhesive and substrate). Such pressure-sensitive adhesives will not have degumming and other phenomena during use. [0003] Pressure-sensitive adhesives can be divided into rubber type and r...

Claims

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Application Information

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IPC IPC(8): C09J133/08C09J11/00C08F220/18C08F220/28C08F220/06C08F218/08C08F220/58C08F2/24C08F2/26
Inventor 曹祥来孔庆茹乔毅
Owner SHANGHAI ZHONGXIN YUXIANG CHEM
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