A kind of aqueous acrylic pressure-sensitive adhesive emulsion and preparation method thereof

An acrylic pressure-sensitive adhesive, multifunctional acrylic technology, applied in the direction of adhesive types, ester copolymer adhesives, etc., can solve the problems of high drying temperature, PE protective film peeling, large workshop space, etc., to reduce drying time. The effect of drying temperature and drying time, avoiding the use of emulsifiers, and reducing equipment investment costs

Active Publication Date: 2018-03-27
SHANGHAI BAOLIJIA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the water-based acrylic pressure-sensitive adhesives on the market have low solid content, peeling force below 800 grams, and poor water resistance, which have always restricted their application.
In addition, on the one hand, in order to pursue the two-way improvement of cost and efficiency, a faster coating speed (50-60m / min) of water-based acrylic pressure-sensitive adhesive will be required, which requires a higher drying temperature and a longer oven length. The glue is mainly coated on the PE base material. If the temperature is too high, the PE base material will soften, wrinkle or even break during the coating process; a long oven occupies a large space in the factory building and requires a high investment
On the other hand, a large amount of emulsifiers are used in the preparation of water-based acrylic pressure-sensitive adhesives, resulting in poor water resistance of water-based acrylic pressure-sensitive adhesives, especially in high-temperature and high-humidity environments. Protective effect, these factors also limit the use of water-based acrylic pressure-sensitive adhesives

Method used

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  • A kind of aqueous acrylic pressure-sensitive adhesive emulsion and preparation method thereof
  • A kind of aqueous acrylic pressure-sensitive adhesive emulsion and preparation method thereof
  • A kind of aqueous acrylic pressure-sensitive adhesive emulsion and preparation method thereof

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preparation example Construction

[0043] Another object of the present invention is to provide the preparation method of aqueous acrylic pressure-sensitive adhesive emulsion, described method comprises the following steps:

[0044] 1) Mix 60-80% emulsifier with 70-80% water, stir evenly, then add acrylate monomer and functional monomer, stir evenly to obtain emulsion, set aside;

[0045] 2) Add the remaining 20-30% water and 20-40% emulsifier into the flask, stir and disperse evenly, and when heated to 80-90°C, add the initiator, and drop the emulsion in step 1) Add it to the flask, and the dropping time is 4-5h. After the dropping, heat to 88-95°C and keep it warm for 1-2h, then cool down to 35-45°C, add ammonia water to adjust the pH to 7-8, and add defoamer , stir well, that is.

[0046] In a preferred embodiment, the holding time is 1 h, and the temperature is lowered to 40°C.

Embodiment approach 1

[0048] Embodiment 1, a water-based acrylic pressure-sensitive adhesive emulsion, the acrylic pressure-sensitive adhesive emulsion includes the following components by weight:

[0049]

[0050] Wherein, described emulsifier is the complex emulsifier that anionic emulsifier and nonionic emulsifier are combined, and described anionic emulsifier is carboxylate type emulsifier, phosphate ester type emulsifier, sulfonate type emulsifier One or more, the nonionic emulsifier is EO / PO copolyether.

Embodiment approach 2

[0051] Embodiment 2 is the same as Embodiment 1, except that in the emulsifier, the weight ratio of the anionic emulsifier to the nonionic emulsifier is 0.05-0.8.

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Abstract

The invention belongs to the technical field of polymeric pressure-sensitive adhesives and particularly relates to a water-based acrylic pressure-sensitive adhesive emulsion and a preparation method thereof. The water-based acrylic pressure-sensitive adhesive emulsion is prepared from an acrylate monomer, an emulsifier, an initiator, a defoaming agent and water. The acrylic pressure-sensitive adhesive emulsion has the characteristics of high solid content, high peeling resistance and high water resistance; the coating speed is high, the coating temperature is low and the coating efficiency is high when the adhesive emulsion is used.

Description

technical field [0001] The invention belongs to the technical field of polymer pressure-sensitive adhesives, and more specifically, the invention relates to a water-based acrylic pressure-sensitive adhesive emulsion and a preparation method thereof. Background technique [0002] Pressure-sensitive adhesive is a type of adhesive that is sensitive to pressure. It only needs to apply a certain pressure to wet the surface of the adherend and produce a type of adhesive. No damage, the adhesive layer will not dry out for a long time, and its application range is very wide. [0003] At present, pressure-sensitive adhesives are mainly solvent-based acrylate pressure-sensitive adhesives. Due to their excellent performance, solvent-based pressure-sensitive adhesives are widely used in the electronics industry, automobile industry, packaging and other fields. However, organic solvents cause great harm to the environment and workers. At the same time, solvents have high requirements fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/18C08F2/30C08F220/18C08F222/22C09J133/08
CPCC08F2/30C08F120/18C08F220/18C08F220/1808C09J133/08C08F222/22
Inventor 韩帮新袁宜恩
Owner SHANGHAI BAOLIJIA NEW MATERIAL CO LTD
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