Silane coupling agent modified resin easy-peel environment friendly water-based pressure-sensitive adhesive

A technology of silane coupling agent and modified resin, which is applied in the field of pressure-sensitive adhesives, can solve the problems of low bonding strength and poor water resistance of water-based pressure-sensitive adhesives, and achieve low bonding strength, improve structural stability, and improve water resistance sexual effect

Inactive Publication Date: 2012-10-03
SHANGHAI ZHONGXIN YUXIANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an environmentally friendly water-based pressure-sensitive adhesive that is easily peeled off by a silane coupling agent modified resin, which has the advantages of environmental protection, low cost, strong adhesion, good water resistance and easy peeling, and avoids solvent-based pressure-sensitive adhesives. The

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, 1.6g allyl trichlorosilane, 3.6g N-methylolacrylamide and 0.44g n- Dodecyl mercaptan, react at 60°C 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 o...

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, 1.6g vinyl tris(β-methoxyethoxy) silane, 3.6g N-hydroxy React methacrylamide with 0.44g of n-dodecylmercaptan at 62°C 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...

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, 1.6g allyl trichlorosilane, 3.6g N-methylolacrylamide and 0.44g n- Dodecyl mercaptan, react at 60°C 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 the br...

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PUM

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Abstract

The invention relates to silane coupling agent modified resin easy-peel environment friendly water-based pressure-sensitive adhesive. A preparation method of the silane coupling agent modified resin easy-peel environment friendly water-based pressure-sensitive adhesive comprises the following steps: (1) using water as a solvent, uniformly mixing polyvinyl alcohol, an anionic surface agent, an emulsifying agent and a pH regulating agent, heating to 50 DEG C, and adding acrylic acid monomers, a silane coupling agent, crosslinking monomers and a polymerization degree regulating agent for reacting for 1h at 60-65 DEG C to obtain a preliminary emulsion; (2) uniformly mixing 25% of the preliminary emulsion and 40% of initiator, heating to 80-85 DEG C, after the liquid becomes blue, beginning to drop the residual preliminary emulsion, adding 20% of the initiator every 1h to finish dropping within 3h, finally, replenishing the residual initiators, and refluxing for 1-1.5h at 90 DEG C; and (3) cooling the reaction liquid to 40 DEG C, adding a bridging agent, uniformly mixing, and then cooling to room temperature. The silane coupling agent modified resin easy-peel environment friendly water-based pressure-sensitive adhesive provided by the invention has the advantages of low price, simple process, high bonding strength, peelability and the like, and pollution to the environment of solvent type pressure-sensitive adhesive can be avoided.

Description

technical field [0001] The invention relates to a pressure-sensitive adhesive, in particular to an environmentally friendly water-based pressure-sensitive adhesive which is easily peeled off by a silane coupling agent-modified resin. 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 appear degumming and other phenomena during use. Peelable pressure sensitive agents, when removed from the substr...

Claims

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Application Information

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IPC IPC(8): C09J133/08C09J11/06C08F220/18C08F230/08
Inventor 曹祥来孔庆茹乔毅
Owner SHANGHAI ZHONGXIN YUXIANG CHEM
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