Ultralow-viscosity pressure-sensitive adhesive and ultralow-viscosity protective film

A technology of pressure-sensitive adhesives and pressure-sensitive adhesive layers, applied in adhesives, adhesive types, ester copolymer adhesives, etc., can solve unsolved problems such as ultra-low adhesive peeling force, organic solvent environmental pollution, and high production costs

Inactive Publication Date: 2014-08-06
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The Chinese patent with the publication number CN102533180A discloses an ultra-low viscosity pressure-sensitive adhesive, comprising 25-31 parts by weight of polymethacrylate ethyl acetate solution, 0.5-1.6 parts by weight of cross-linking agent, 0.03-1.1 parts by weight functional macromolecules, 0.001-0.04 parts by weight catalyst and 67-72 parts by weight ethyl acetate, the ultra-low viscosity pressure-sensitive adhesive has good adhesion to polyethylene film, but it is also solvent-based ultra-low Viscous

Method used

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  • Ultralow-viscosity pressure-sensitive adhesive and ultralow-viscosity protective film

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preparation example Construction

[0047] The present invention also provides a method for preparing the above-mentioned ultra-low viscosity pressure-sensitive adhesive, comprising:

[0048] Dividing 50-150 parts by weight of water into three parts, water I, water II and water III;

[0049] Divide 0.3-2 parts by weight of emulsifier into two parts, emulsifier I and emulsifier II;

[0050] Mix water 1, emulsifier 1, 100 parts by weight of monomers and 3 to 5 parts by weight of internal crosslinking agent, and stir to obtain a pre-emulsion;

[0051] mixing water II with 0.1 to 1.2 parts by weight of an initiator to obtain a dilute initiator solution;

[0052] Mix water III, emulsifier II, 0.1-1 parts by weight buffer with part of the pre-emulsion, heat, then add part of the dilute initiator solution, continue heating, and then add the remaining pre-emulsion and the remaining dilute initiator solution dropwise, Insulation reaction, finally cool down and add 0.1-1.6 parts by weight of additives, stir and filter t...

Embodiment 1

[0076] 1.1 Weigh 129g of deionized water, 3.2g of emulsifier (the specific composition is allyloxynonylphenol polyoxyethylene ether ammonium sulfate), 10g of acrylic acid, 180g of butyl acrylate, 96g of 2-ethylhexyl acrylate, 3.6 g of acetoacetoxyethyl methacrylate and 10 g of hydroxyethyl methacrylate were placed in a beaker, and stirred at high speed until the milky white emulsion was obtained, which was the pre-emulsion.

[0077] 1.2 Weigh 60g of deionized water and 1.2g of ammonium persulfate and mix evenly to obtain a dilute initiator solution.

[0078] 1.3 Add 141g of deionized water, 0.6g of emulsifier, 0.9g of sodium bicarbonate and 21.45g of 1.1 to a 1L four-necked bottle equipped with a nitrogen gas guide tube, a thermometer, a condenser tube, and a constant-pressure low-price funnel. Pre-emulsion, stir and heat up to 72°C, add 15g of the dilute initiator solution obtained in 1.2 to initiate the reaction, when the reaction temperature is stable at 80°C, start to drop...

Embodiment 2

[0082] 2.1 Weigh 129g deionized water, 3.2g emulsifier (the specific composition is allyloxynonylphenol polyoxyethylene ether ammonium sulfate), 7.5g acrylic acid, 190g butyl acrylate, 86g 2-ethylhexyl acrylate 1. Put 3.63g of acetoacetoxy ethyl methacrylate and 7.5g of hydroxyethyl methacrylate in a beaker, and stir at a high speed until the milky white emulsion is formed, which is the pre-emulsion.

[0083] 2.2 Weigh 60g of deionized water and 1.2g of ammonium persulfate and mix evenly to obtain a dilute initiator solution.

[0084] 2.3 Add 141g of deionized water, 0.6g of emulsifier, 0.9g of sodium bicarbonate and 21.3g of 2.1 to a 1L four-necked bottle equipped with a nitrogen gas guide tube, a thermometer, a condenser tube, and a constant-pressure low-price funnel. Pre-emulsion, stir and heat up to 72°C, add 15g of the dilute initiator solution obtained in 2.2 to initiate the reaction, when the reaction temperature is stable at 80°C, start to drop the remaining pre-emulsi...

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Abstract

The invention provides an ultralow-viscosity pressure-sensitive adhesive and an ultralow-viscosity protective film. The ultralow-viscosity pressure-sensitive adhesive is composed of the following components in parts by weight: 100 parts of monomer, 0.1-1.2 parts of initiator, 50-150 parts of water, 0.3-2 parts of emulsifier, 3-5 parts of inner crosslinking agent, 0.3-0.6 part of outer crosslinking agent, 0.1-1.6 parts of assistant and 0.1-1 part of buffering agent. Compared with the prior art, the glass transition temperature of the monomer is lower, thereby ensuring the softness required by the adhesive layer; the inner crosslinking agent is added to increase the molecular weight of the ultralow-viscosity pressure-sensitive adhesive part, so that macromolecules and micromolecules are distributed in a certain state, thereby compromising the balance between the initial viscosity and cohesive force; and the outer crosslinking agent is added into the ultralow-viscosity pressure-sensitive adhesive, so that molecular chains are further crosslinked in the film formation process of the pressure-sensitive adhesive, thereby effectively lowering the peel strength of the pressure-sensitive adhesive and enhancing the high temperature resistance.

Description

technical field [0001] The invention belongs to the technical field of adhesives, and in particular relates to an ultra-low viscosity pressure-sensitive adhesive and an ultra-low viscosity protective film. Background technique [0002] With the rapid development of automobiles, electronics, and circuits, the domestic demand for high-grade protective films that has long relied on imports is increasing day by day. Correspondingly, pressure-sensitive adhesives for high-grade protective films, especially ultra-low viscosity protective films, have also been greatly developed. In recent years, the high-end protective film products on the market are generally imported, or the imported protective film is coated with pressure-sensitive adhesive to form a product, while the pressure-sensitive adhesive for domestic related protective film generally stays at For mid-to-low-end products, most of the domestic companies have imported technology, high-end protective film coating lines and p...

Claims

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Application Information

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IPC IPC(8): C09J133/08C09J7/02C08F220/18C08F220/06C08F222/20C08F220/28C08J3/24
Inventor 夏有贵
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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