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Rear cross-linking heatproof emulsion pressure-sensitive adhesive and method for producing same

A cross-linking, heat-resistant technology, applied in the direction of adhesives, adhesive types, film/sheet adhesives, etc., can solve the problem of difficulty in obtaining, expensive polymer emulsifiers and reactive emulsifiers, and inapplicability Large-scale production and other issues, to achieve the effect of easy control, good high temperature resistance, and stable storage process

Inactive Publication Date: 2013-02-06
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN 102533174A adopts polymerizable emulsifier allyloxynonylphenol, which eliminates the post-treatment process of emulsifier, and produces a pressure-sensitive adhesive tape with a peeling strength of 550N / m, an initial adhesion performance of 14# balls, and a long-lasting adhesive tape. The performance is greater than 24h, but the polymer emulsifier and reactive emulsifier are more expensive and difficult to obtain in the actual production process of this invention, and are not suitable for large-scale production

Method used

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  • Rear cross-linking heatproof emulsion pressure-sensitive adhesive and method for producing same
  • Rear cross-linking heatproof emulsion pressure-sensitive adhesive and method for producing same
  • Rear cross-linking heatproof emulsion pressure-sensitive adhesive and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Pre-emulsion preparation

[0050] 130g butyl acrylate, 70g methyl methacrylate, 0.05g sodium carbonate, 0.33g sodium dodecylsulfonate, 0.67g nonylphenol polyoxyethylene (9) ether, 0.02g diacetone acrylamide, 150g Ionized water and 0.18 g of potassium persulfate were mixed, and after mechanical stirring and mixing, a milky white milk-like pre-emulsion was obtained.

[0051] (2) Emulsion polymerization

[0052] Put the four-necked reaction round-bottom bottle equipped with a mechanical stirrer, reflux condenser, thermometer and constant pressure funnel into the reactor after adding 50g of deionized water and heating it to 80°C in a water bath, stirring at a speed of 150r / min. Add 0.02g of potassium persulfate and 10g of the pre-emulsion prepared in step (1). After the blue color appears in the system, start to add the pre-emulsion obtained in the remaining step (1) dropwise through the constant pressure funnel, and the dropwise addition is completed within 2 to 3 ho...

Embodiment 2

[0058] (1) Pre-emulsion preparation

[0059] 200g isooctyl acrylate, 8g acrylic acid, 2g sodium carbonate, 2g sodium dodecylsulfonate, 4g sorbitol polyoxyethylene (20) ether (POE), 4g diacetone acrylamide, 150g deionized water and 3.6g Potassium persulfate was mixed, and after mechanical stirring and mixing, a milky white milk-like pre-emulsion was obtained.

[0060] (2) Emulsion polymerization

[0061] Add 50g of deionized water into a four-necked reaction round-bottom bottle equipped with a mechanical stirrer, reflux condenser, thermometer and constant pressure funnel, place it in a water bath, heat it to 80°C, stir at 250r / min, and add to the reactor 0.4g potassium persulfate and the pre-emulsion prepared in step (1) of 60g. After the blue phase appears in the system, start to add the remaining pre-emulsion obtained in step (1) dropwise through the constant pressure funnel, and complete the dropwise addition within 2 to 3 hours, keep the temperature for 2 hours to complet...

Embodiment 3

[0067] (1) Pre-emulsion preparation

[0068] Take 160g butyl acrylate, 40g methyl methacrylate, 6g acrylic acid, 0.05g sodium carbonate, 1.6g sodium lauryl sulfate, 3.2g octylphenol polyoxyethylene (9) ether, 0.04g diacetone acrylamide, 50g of deionized water and 0.9g of potassium persulfate were mixed and mechanically stirred to obtain a milky white milk-like pre-emulsion.

[0069] (2) Emulsion polymerization

[0070] Add 50g of deionized water into a four-necked reaction round-bottom bottle equipped with a mechanical stirrer, reflux condenser, thermometer and constant pressure funnel, place it in a water bath, heat it to 80°C, stir at 250r / min, and add to the reactor 0.1g of potassium persulfate and 60g of the pre-emulsion prepared in step (1). After the blue phase appears in the system, start to add the pre-emulsion obtained in the remaining step (1) dropwise through the constant pressure funnel. The dropwise addition is completed within 2 to 3 hours, and the temperature ...

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Abstract

The invention discloses a rear cross-linking heatproof emulsion pressure-sensitive adhesive and a method for producing the same. The rear cross-linking heatproof emulsion pressure-sensitive adhesive contains the following components in parts by weight: 100 parts of hard and soft monomer, 0-4 parts of functional monomer, 0.01-2 parts of rear cross-linking monomer, 0.5-3 parts of emulsifying agent, 0.1-2 parts of initiating agent, 0.025 part of buffering agent and 0.01-2 parts of hexanedioic acid, wherein the hard and soft monomer is prepared from a soft monomer and a hard monomer according to the mass ratio of (65-100):(0-35). According to the method, diacetone acrylamide is firstly adopted as the rear cross-linking monomer to pre-emulsify the whole monomers, then, a batch-fed method is adopted to prepare copolymer emulsion, and finally, the hexanedioic acid is added into the copolymer emulsion so as to obtain rear cross-linking emulsion. The pressure-sensitive adhesive which is prepared by coating the rear cross-linking emulsion can simultaneously have good initial adhesion, permanent adhesion and 180-degree peeling strength as well as good temperature resistance; and moreover, the method for producing is simple, convenient to operate and easy to control.

Description

technical field [0001] The invention belongs to the field of emulsion pressure-sensitive adhesives, in particular to a post-crosslinking heat-resistant emulsion pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] The full name of pressure-sensitive adhesive is pressure-sensitive adhesive, commonly known as self-adhesive. Its broadest definition refers to the application of finger pressure to immediately achieve the purpose of bonding the smooth surface of any adherend to the adhesive. At the same time, when it is removed from the surface of the adherend, the adhesive will not pollute the surface of the adherend. This type of adhesive is a pressure-sensitive adhesive. [0003] According to the production process, the pressure sensitive adhesive can be divided into solvent type, hot melt type, emulsion type and radiation curing type. Among them, the production process of emulsion pressure-sensitive adhesive does not require organic sol...

Claims

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Application Information

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IPC IPC(8): C09J133/08C09J11/06C09J7/02C08F220/18C08F220/14C08F220/58C08F220/06C08F2/30C08F2/26C08J3/24
Inventor 吕满庚张蕊梁利岩兰延勋张云飞
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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