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Heat-resistant polyacrylate pressure-sensitive adhesive emulsion for aluminum foil and application and preparation method thereof

A technology of polyacrylate and pressure-sensitive adhesive emulsion, which is applied in the direction of pressure-sensitive film/sheet, adhesive, film/sheet-shaped adhesive, etc., and can solve the problem of reducing adhesive tape performance, high cost, and large VOC emissions, etc. problems, to achieve the effects of ensuring durability and mechanical properties, increasing temperature resistance, and saving costs

Inactive Publication Date: 2017-06-13
WUXI HAITE NEW MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Acrylic pressure-sensitive adhesives used for aluminum foil require high mechanical properties and a certain temperature resistance function, because the bonding of the heat insulation layer of electrical products and the heating of electrical circuits may greatly reduce the adhesive performance of the tape during use
[0003] At present, the acrylate pressure-sensitive adhesives used for high-temperature-resistant aluminum foil are mainly solvent-type acrylate pressure-sensitive adhesives. Solvent-type acrylate pressure-sensitive adhesives have excellent comprehensive performance, but they contain a large amount of organic solvents such as toluene and ethyl acetate. , storage and transportation are dangerous, and VOC emissions are large, the coating process affects the health of operators, pollutes the environment, and costs high. These problems prompt people to urgently search for and develop new pressure-sensitive adhesives

Method used

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  • Heat-resistant polyacrylate pressure-sensitive adhesive emulsion for aluminum foil and application and preparation method thereof
  • Heat-resistant polyacrylate pressure-sensitive adhesive emulsion for aluminum foil and application and preparation method thereof
  • Heat-resistant polyacrylate pressure-sensitive adhesive emulsion for aluminum foil and application and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 1.0g of anionic emulsifier secondary alkyl sodium sulfate, 0.5g of nonionic emulsifier polyoxyethylene ether sorbitan monolaurate, 30g of deionized water, stir at room temperature to obtain emulsifier aqueous solution; slowly add 2g of N-methylol base acrylamide, and then add a mixed monomer consisting of 60g butyl acrylate, 3g methyl methacrylate, and 2g methacrylic acid, and stir for 45min at a stirring speed of 800 r / min to prepare pre-emulsion 1.

[0029] Weigh 0.2 g of ammonium persulfate, add 10 g of deionized water to dissolve, and prepare initiator aqueous solution 2.

[0030] Dissolve 0.1g of buffer agent sodium acetate in 40g of deionized water and heat to 80°C, add 5% pre-emulsion 1 and 5% initiator aqueous solution 2, and react for 30 minutes to prepare the seed emulsion.

[0031] Add the remaining 95% pre-emulsion 1 and 95% initiator aqueous solution 2 to the seed emulsion at the same time for 2 hours, then raise the temperature to 85°C, keep it warm ...

Embodiment 2

[0035] Weigh 0.5g anionic emulsifier sodium secondary alkyl sulfonate, 1g nonionic emulsifier polyoxyethylene ether sorbitan monolaurate, 40g deionized water, stir at room temperature to obtain emulsifier aqueous solution; slowly add 70g butyl acrylate , 10g of methyl methacrylate, 2g of methacrylic acid, and 2g of N-methylolacrylamide, and stirred for 45 minutes at a stirring speed of 800 r / min to prepare pre-emulsion 1.

[0036] Weigh 0.2 g of ammonium persulfate, add 20 g of deionized water to dissolve, and prepare initiator aqueous solution 2.

[0037] Heat 80g of deionized water dissolved with 0.2g of sodium acetate to 80°C, add 8% pre-emulsion 1 and 25% initiator aqueous solution 2, and react for 30 minutes to prepare a seed emulsion.

[0038] Add the remaining 92% pre-emulsion 1 and 75% initiator aqueous solution 2 to the seed emulsion at the same time for 3.5 hours, then raise the temperature to 85°C, keep it warm for 1 hour, cool down to 40°C, add 0.1g of ammonia wate...

Embodiment 3

[0042] Weigh 2g of anionic emulsifier secondary alkyl sodium sulfonate, 1g of nonionic emulsifier polyoxyethylene ether sorbitan monolaurate, 50g of deionized water, stir at room temperature to obtain emulsifier aqueous solution; slowly add 85g of butyl acrylate, A mixed monomer consisting of 25g of methyl methacrylate, 10g of methacrylic acid, and 10g of N-methylolacrylamide was stirred for 40 minutes at a stirring speed of 800 r / min to prepare pre-emulsion 1.

[0043] Weigh 1 g of ammonium persulfate, add 40 g of deionized water to dissolve, and prepare initiator aqueous solution 2.

[0044] Heat 100g of deionized water dissolved with 0.2g of sodium acetate to 80°C, add 15% pre-emulsion 1 and 40% initiator aqueous solution 2, and react for 20 minutes to prepare a seed emulsion.

[0045] Add the remaining 85% pre-emulsion 1 and 60% initiator aqueous solution 2 to the seed emulsion at the same time for 3.5 hours, then raise the temperature to 85°C, keep it warm for 1h, cool do...

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Abstract

The invention discloses a heat-resistant polyacrylate pressure-sensitive adhesive emulsion for an aluminum foil and a preparation method and application thereof. An emulsion-type pressure-sensitive adhesive mainly comprises an acrylate monomer, a cross-linking monomer, an emulsifier, a buffer agent, a defoaming agent, a wetting agent, a pH modifier and an initiator. By adopting a pre-emulsification semi-continuous seed polymerization technology, a monomer and an assistant are sequentially added to a water solution for emulsification, polymerization reaction is initiated by continuously adding a pre-emulsification solution; and the assistants of the defoaming agent, the wetting agent and the pH modifier are finally added to stir evenly. The pressure-sensitive adhesive coats the surface of the aluminum foil to be dried, the thickness of the dry adhesive is 45 microns, the surface of the adhesive is uniform and transparent, and free of the defects of bubbles and sinkholes, the release force reaches 12N / 25mm, the durable viscosity is not lower than 200h, the durable viscosity is not lower than 48h under the condition of 80 DEG C / 95% and the durable viscosity is not lower than 12h under the condition of 120 DEG C / 95%.

Description

technical field [0001] The invention relates to the technical field of water-based pressure-sensitive adhesives, in particular to a high-temperature-resistant aluminum foil polyacrylate pressure-sensitive adhesive emulsion and its application and preparation method. Background technique [0002] The acrylate pressure-sensitive adhesive used for aluminum foil requires high mechanical properties and a certain temperature resistance function, because the bonding of the heat insulation layer of electrical products and the heating of electrical circuits may greatly reduce the adhesive performance of the tape during use. [0003] At present, the acrylate pressure-sensitive adhesives used for high-temperature-resistant aluminum foil are mainly solvent-type acrylate pressure-sensitive adhesives. Solvent-type acrylate pressure-sensitive adhesives have excellent comprehensive performance, but they contain a large amount of organic solvents such as toluene and ethyl acetate. , storage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F220/48C08F220/06C08F220/58C08F2/26C08F2/30C09J7/02
CPCC08F2/26C08F2/30C08F220/18C08F220/1804C09J7/22C09J7/38C09J2301/122C09J2301/302C08F220/14C08F220/06C08F220/58C08F220/48
Inventor 李卫东李小静白永平席丹殷晓芬
Owner WUXI HAITE NEW MATERIAL RES INST
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