Single-component ultraviolet light self-crosslinking type acrylate copolymer emulsion pressure-sensitive adhesive and synthetic method thereof as well as application thereof

An acrylate, ultraviolet light technology, used in ester copolymer adhesives, acid copolymer adhesives, nitrile copolymer adhesives, etc., can solve the problem of limited development space, strong odor, easy yellowing of coating films, etc. problem, to achieve the effect of strong cohesion, good initial viscosity and stable performance

Inactive Publication Date: 2012-01-04
SHANGHAI CHENGYING NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the adhesive layer is cured, the residual UV photoinitiator is easy to migrate to the surface, generating toxic by-products with strong odor, and the coating film is easy to turn yellow, which greatly limits the application of UV-curable pressure-sensitive adhesives in high-end products (such as food labels). , beauty product labels and personal care product labels) development space

Method used

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  • Single-component ultraviolet light self-crosslinking type acrylate copolymer emulsion pressure-sensitive adhesive and synthetic method thereof as well as application thereof
  • Single-component ultraviolet light self-crosslinking type acrylate copolymer emulsion pressure-sensitive adhesive and synthetic method thereof as well as application thereof
  • Single-component ultraviolet light self-crosslinking type acrylate copolymer emulsion pressure-sensitive adhesive and synthetic method thereof as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The single-component UV self-crosslinking acrylate copolymer emulsion pressure-sensitive adhesive of this embodiment is synthesized from the following components (parts by weight):

[0049]

[0050] The specific synthesis process is as follows: Put UV-active monomers, photo-crosslinking functional monomers, other monofunctional monomers, emulsifiers, chain transfer agents and part of the dispersion medium into the reaction kettle and stir at room temperature for 30 minutes to obtain a pre-emulsion; Put 10wt% of the pre-emulsion, 20wt% of the initiator, the pH regulator and the rest of the dispersion medium into another reaction kettle, stir and react at 85°C for 1h, so that the seed emulsion polymerization occurs; add 1 drop of Add the remaining pre-emulsion dropwise at a speed of 5 s, add the remaining initiator dropwise at a speed of 1 drop / min, finish adding the pre-emulsion in 2 hours, and drop the initiator in 2.5 hours; finish adding the pre-emulsion and initiat...

Embodiment 2

[0053] The single-component UV self-crosslinking acrylate copolymer emulsion pressure-sensitive adhesive of this embodiment is synthesized from the following components (parts by weight):

[0054]

[0055]

[0056] Synthetic process is identical with embodiment 1. The obtained single-component UV self-crosslinking type acrylate copolymer pressure-sensitive adhesive emulsion is coated on the substrate, and after the solvent is evaporated, light crosslinking is carried out in a UV curing device. The irradiation energy of UV self-crosslinking is 500mJ. After testing, the cross-linking degree of the pressure-sensitive adhesive layer after ultraviolet light irradiation is 96%; the initial tack of the pressure-sensitive adhesive tape is 12 (ball number), the stickiness is greater than 72 hours, and the 180° peel strength is 2.1N / 25mm.

Embodiment 3

[0058] The single-component UV self-crosslinking acrylate copolymer emulsion pressure-sensitive adhesive of this embodiment is synthesized from the following components (parts by weight):

[0059]

[0060] Synthetic process is identical with embodiment 1. The obtained single-component UV self-crosslinking type acrylate copolymer pressure-sensitive adhesive emulsion is coated on the substrate, and after the solvent is evaporated, light crosslinking is carried out in a UV curing device. The irradiation energy of UV self-crosslinking is 500mJ. After testing, the cross-linking degree of the pressure-sensitive adhesive layer after ultraviolet irradiation is 82%; the initial tack of the pressure-sensitive adhesive tape is 15 (ball number), the stickiness is greater than 72 hours, and the 180° peel strength is 2.8N / 25mm.

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Abstract

The invention relates to a single-component ultraviolet light self-crosslinking type acrylate copolymer emulsion pressure-sensitive adhesive and a synthetic method thereof as well as an application thereof; the emulsion pressure-sensitive adhesive is prepared from the following components in parts by weight through the thermal polymerization and synthesis of a free-radical emulsion: 0.02-4 of ultraviolet light active monomer, 2-20 of light crosslinking functional monomer, 15-40 of other single functionality monomer, 0.2-3 of emulsifying agent, 0.04-0.8 of initiator, 0.02-0.3 of chain transferagent, 0-2 of pH regulator and 50-80 of dispersed medium. The emulsion pressure-sensitive adhesive product is coated on a base material of a product to be coated; and after a solvent is volatile, thelight crosslinking is carried out on the coated product in an ultraviolet light curing device. Compared with the prior art, the single-component ultraviolet light self-crosslinking type acrylate copolymer emulsion pressure-sensitive adhesive has the advantages of having stronger cohesive force, better initial adhesion and ideal persistent persistent adhesivity, containing no small molecular compounds, forming no toxic by-products, being capable of adapting to different application requirements, being stable in property and the like.

Description

technical field [0001] The invention relates to a coating, in particular to a single-component ultraviolet light self-crosslinking type acrylate copolymer emulsion pressure-sensitive adhesive and its synthesis method and application. Background technique [0002] Emulsion pressure-sensitive adhesives do not contain organic solvents, and have the characteristics of low cost, safe use and little environmental pollution. They have good adhesion to various materials, and the coating film is colorless and transparent. Acrylate copolymer emulsion pressure-sensitive adhesive has a simple formula, good weather resistance, low toxicity or non-toxicity, and is easy to make high-concentration, low-viscosity pressure-sensitive adhesives, and because there are many types of acrylates, acrylic acid with different properties can be prepared according to needs Ester copolymer emulsion PSA to meet different application requirements. [0003] The molecular weight of acrylate copolymer emulsi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J133/14C09J133/02C09J133/20C08F220/18C08F2/24C08F2/30C08F2/26C08F220/32C08F220/28C08F220/44B05D3/06
Inventor 虞明东曾兆华陈嘉李付亚
Owner SHANGHAI CHENGYING NEW MATERIALS
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