A kind of ultra-fine sticky-peeling force acrylic pressure-sensitive adhesive and preparation method thereof

An acrylic pressure-sensitive adhesive, peel force technology, applied in the direction of pressure-sensitive film/sheet, adhesive, adhesive type, etc., can solve unstable, expensive silicone pressure-sensitive adhesive, plasticizer contamination to be attached and other problems to achieve the effect of stable peeling force

Active Publication Date: 2021-02-02
上海英诺威新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most of the acrylic pressure-sensitive adhesives on the market have a peeling force of more than 2g, and some products have a peeling force of more than 1g but are unstable, and most of the pressure-sensitive adhesives within 1g use silicone pressure-sensitive adhesives or add them to glues of more than 2g. plasticizer to achieve the purpose
Silicone pressure-sensitive adhesives are expensive and have limited application range; adding plasticizers will inevitably cause ghost images, plasticizer migration and contamination of the pasted objects, etc.

Method used

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  • A kind of ultra-fine sticky-peeling force acrylic pressure-sensitive adhesive and preparation method thereof
  • A kind of ultra-fine sticky-peeling force acrylic pressure-sensitive adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The additives and the amount added in the preparation process (in "grams"):

[0027] raw material code No. 1 material No. 2 material No. 3 material No. 4 material Isooctyl Acrylate 71.19 166.11 0 0 octadecyl acrylate 8.4 19.6 0 0 Hydroxyethyl acrylate 4.2 9.8 0 0 acrylic acid 0.21 0.49 0 0 Azobisisobutyronitrile 0.042 0.42 0.83 0 acetone 66 66 0 0 Toluene 33 33 83 0 Ethyl acetate 438.54

[0028] In this example, 30% of all monomers (Material No. 1) 2-ethylhexyl acrylate, octadecyl acrylate, hydroxyethyl acrylate, acrylic acid, initiator and solvent were put into the reaction kettle according to the formula , and reacted at 68°C for 20min to obtain a prepolymer; then the remaining raw materials were added dropwise at a uniform speed within 90min, and the reaction was controlled at 70°C. After the dropwise addition, the temperature was kept for 60 min to further increase the po...

Embodiment 2

[0031] The additives and the amount added in the preparation process (in "grams"):

[0032]

[0033]

[0034] In this example, 30% of all monomers (Material No. 1) 2-ethylhexyl acrylate, octadecyl acrylate, hydroxyethyl acrylate, acrylic acid, initiator and solvent were put into the reaction kettle according to the formula , and reacted at 68°C for 30min to obtain a prepolymer; then the remaining raw materials were added dropwise at a uniform speed within 90min, and the reaction was controlled at 70°C. After the dropwise addition, the temperature was continued for 60min to further increase the polymer chain, and the water bath was set at a temperature of 80°C. After the heat preservation, the No. 3 material was mixed uniformly and slowly added dropwise into the reaction device, and the dropping time was controlled at 60min and a temperature of 70°C; After the material No. 3 is added dropwise, it is also stirred and kept for 90 minutes; after the insulation, the material ...

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Abstract

The invention belongs to the technical field of pressure-sensitive polyacrylate adhesives, and provides an ultra-micro adhesion and peel strength pressure-sensitive acrylic adhesive and a preparationmethod thereof. The pressure-sensitive acrylic adhesive is prepared through a multistep reaction and grading dropwise addition process of a pressure-sensitive acrylate adhesive. The pressure-sensitiveacrylic adhesive comprises 15-25 wt% of 2-ethylhexyl acrylate, 2-5% of octadecyl acrylate, 0-0.5 wt% of acrylic acid, 1-3 wt% of hydroxyethyl acrylate, 0.8-2 wt% of an initiator and 70-80 wt% of a solvent. A long-chain alkyl ester having a longer side chain than the 2-ethylhexyl acrylate is introduced to enhance the flexibility of the chain, increase the use amount of a functional monomer and provide many cross-linking points, and a peel strength of below 1 g is obtained by combining multiple solvents and adjusting the synthesis process.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to an acrylic pressure-sensitive adhesive with ultra-micro-stick peeling force and a preparation method thereof. Background technique [0002] At present, most of the acrylic pressure-sensitive adhesives on the market have a peeling force of more than 2g, some products are more than 1g but are unstable, and most of the pressure-sensitive adhesives within 1g are silicone pressure-sensitive adhesives or added in more than 2g of glue. plasticizer to achieve the purpose. Silicone pressure-sensitive adhesives are expensive and have a limited range of applications; adding plasticizers will inevitably cause ghosting, plasticizer migration, and contamination of the attached objects. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide an ultra-micro-stick peeling force acrylic pressure-sensitive adhesive and a preparation method thereof in order to overcom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F220/06C08F220/20C09J133/14C09J7/25C09J7/38
CPCC08F220/18C09J133/066C09J2467/006C09J7/255C09J7/385C08F220/1808C09J2301/302C08F220/1818C08F220/06C08F220/20
Inventor 彭超陈伯鑫陆家一燕雯访严健强李钢东
Owner 上海英诺威新材料科技有限公司
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