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Preparation method of acrylate pressure-sensitive adhesive emulsion with block structure

A pressure-sensitive adhesive emulsion and acrylate technology, which is applied in the field of pressure-sensitive adhesives, can solve problems such as water resistance, heat resistance, infiltration, poor coating, environmental pollution, and incomplete crosslinking, and achieve outstanding comprehensive performance and glass Low melting temperature and good surface resistance

Inactive Publication Date: 2018-01-12
JIANGSU JINGHONG NEW MATERIAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solvent-based pressure-sensitive adhesives are not only costly, but also contain a large amount of flammable and toxic organic solvents, which have adverse effects on the health of workers and seriously pollute the environment; hot-melt pressure-sensitive adhesives have poor aging resistance, poor surface resistance, and comprehensive performance. However, due to its environmental friendliness, non-toxicity, no VOC emission, large molecular weight, high solid content, and low price, water-based acrylic pressure-sensitive adhesives have been widely used in more and more fields. application
[0003] However, water-based acrylate pressure-sensitive adhesives have disadvantages such as water resistance, heat resistance, wettability, and poor coating properties, and the crosslinking effect is not ideal. If an external curing agent is used, the curing agent will react with water and it is difficult to mix with glue. If the internal cross-linking method is used, the cross-linking is incomplete and the high-temperature aging resistance is poor, so it is difficult for water-based pressure-sensitive adhesives to replace solvent-based pressure-sensitive adhesives in some fields, such as alkaline dry battery labels. Almost all pressure-sensitive adhesives are solvent-based acrylic pressure-sensitive adhesives. Battery labels have higher requirements on the comprehensive performance of the glue, that is, good initial adhesion, holding force and peel strength, especially the glue is required to have a prominent 90°peel. Keep it sticky, otherwise, the interface of the battery label is easy to warp

Method used

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  • Preparation method of acrylate pressure-sensitive adhesive emulsion with block structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step (1) Weigh 30 parts of deionized water, 0.3 parts of emulsifier SE-10, and 0.25 parts of emulsifier TX-4SA into the pre-emulsification kettle, start stirring, add 80 parts of butyl acrylate, 10 parts of isooctyl acrylate , stirred for 30 minutes to obtain the acrylate monomer pre-emulsion; weighed 6 parts of deionized water and 0.12 parts of emulsifier SE-10 and added them to another pre-emulsification kettle, started stirring, added 10 parts of styrene, and stirred for 30 minutes to obtain styrene monomer pre-emulsion;

[0025] Step (2) Add 40 parts of deionized water and 0.02 parts of AS-801 into the reaction kettle, raise the temperature to 65-70°C, turn on the condensation reflux device, stir and raise the temperature to 80°C,

[0026] Add 2.5% acrylate monomer pre-emulsion, then dissolve 0.12 parts of ammonium persulfate in 3 parts of water and add it to the reaction kettle at one time, and react for 30 minutes;

[0027] Step (3) Add 38% acrylate monomer pre-e...

Embodiment 2

[0029] Step (1) Weigh 30 parts of deionized water, 0.36 parts of DNS-86, and 0.24 parts of emulsifier SN-10 into the pre-emulsification kettle, start stirring, add 70 parts of butyl acrylate, 16 parts of

[0030] Isooctyl acrylate and 2 parts of methacrylic acid were stirred for 30 minutes to obtain an acrylate monomer pre-emulsion; weighed 6 parts of deionized water and 0.12 parts of emulsifier SE-10 into another pre-emulsification kettle, started stirring, and added 12 parts of styrene, stirred for 30min to obtain styrene monomer pre-emulsion;

[0031] Step (2) Add 36 parts of deionized water and 0.012 parts of emulsifier AES-4 into the reactor, raise the temperature to 65-70°C, turn on the condensation reflux device, stir and raise the temperature to 80°C, add 3.5% acrylate monomer pre-emulsion, Then dissolve 0.09 parts of ammonium persulfate in 3 parts of water and add it to the reaction kettle at one time, and react for 30 minutes;

[0032] Step (3) Add 26% acrylate mono...

Embodiment 3

[0035] Step (1) Weigh 30 parts of deionized water, 0.3 parts of emulsifier SE-10, and 0.45 parts of emulsifier AMPS into the pre-emulsification kettle, start stirring, add 70 parts of butyl acrylate, 18 parts of isooctyl acrylate, 2 1 part of hydroxyethyl methacrylate, 2 parts of glycidyl methacrylate, and stirred for 30 minutes to obtain an acrylate monomer pre-emulsion; weigh 6 parts of deionized water and 0.09 parts of emulsifier SE-10 and add it to another pre-emulsification tank , start stirring, add 8 parts of styrene, stir for 30min to obtain styrene monomer pre-emulsion;

[0036] Step (2) Add 45 parts of deionized water and 0.018 parts of NPES-4 to the reactor, raise the temperature to 65-70°C, turn on the condensation reflux device, stir and raise the temperature to 80°C, add 2.5% acrylate monomer pre-emulsion, and then Dissolve 0.12 parts of ammonium persulfate in 3 parts of water and add it to the reaction kettle at one time, and react for 30 minutes;

[0037] Step...

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Abstract

The invention discloses a preparation method of an acrylate pressure-sensitive adhesive emulsion with a block structure. The preparation method comprises the steps of uniformly mixing an acrylate monomer with deionized water and an emulsifying agent, uniformly mixing a styrene monomer with deionized water and an emulsifying agent, and stirring and emulsifying to obtain an acrylate monomer pre-emulsion and a styrene monomer pre-emulsion; uniformly stirring and mixing deionized water and a bottoming emulsifying agent, rising temperature, and carrying out condensation reflux; adding the acrylatemonomer pre-emulsion, and then adding a first initiating agent; dropwise adding part of styrene acrylate monomer pre-emulsion and a second initiating agent into the emulsion of the step (2), then dropwise adding all styrene monomer pre-emulsion, finally dropwise adding the rest acrylate monomer pre-emulsion, and discharging to obtain the emulsion. The emulsion is low in vitrifaction temperature and good in wettability, provides an adhesion property, is low in cost of a pressure-sensitive adhesive, has favorable initial adhesion, permanent adhesion and peeling strength, outstanding comprehension property, and good curve surface resistance, and can be widely applied in the field of curve-surface tags.

Description

technical field [0001] The invention belongs to the field of pressure-sensitive adhesives, and in particular relates to a block-structured acrylate pressure-sensitive adhesive emulsion and a preparation method thereof. Background technique [0002] The main types of acrylic pressure-sensitive adhesives are solvent-based pressure-sensitive adhesives, water-based pressure-sensitive adhesives and hot-melt pressure-sensitive adhesives. Solvent-based pressure-sensitive adhesives are not only costly, but also contain a large amount of flammable and toxic organic solvents, which have adverse effects on the health of workers and seriously pollute the environment; hot-melt pressure-sensitive adhesives have poor aging resistance, poor surface resistance, and comprehensive performance. However, due to its environmental friendliness, non-toxicity, no VOC emission, large molecular weight, high solid content, and low price, water-based acrylic pressure-sensitive adhesives have been widely...

Claims

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Application Information

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IPC IPC(8): C08F293/00C09J153/00
CPCC08F212/08C08F220/06C08F220/14C08F293/00C09J133/08C09J153/00C08F220/1804
Inventor 吴培龙孙大伟
Owner JIANGSU JINGHONG NEW MATERIAL TECH
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