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Single-component water-based adhesive for evaporative cooling wet curtain and preparation method thereof

A single-component, evaporative technology, applied in the direction of polymer adhesive additives, non-polymer adhesive additives, adhesive types, etc., can solve the problem of long-term high and low temperature resistance of wet curtains and slow release of free formaldehyde , bring out harmful substances and other problems, achieve excellent wetting and leveling performance, ensure adhesion and water resistance, and improve wet adhesion

Active Publication Date: 2012-06-27
DONGGUAN STAR COSM POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These one-component systems improve the performance of acrylate emulsions to a certain extent, but they cannot meet the requirements of long-term high and low temperature resistance of the wet curtain, and the requirements of water immersion without falling off
[0005] In addition, most of the current one-component acrylate emulsions are exposed to water for a long time after film formation and drying. Harmful substances may be brought out by water evaporation.
Because these systems usually do not overcome the following problems: (1) the system using N-methylolacrylamide as a self-crosslinking monomer will slowly release free formaldehyde; (2) most of the commonly used emulsifiers contain nonylphenol (APEO) structure, this substance is harmful to the human body; (3) When eliminating free polymerized monomers in the final stage of the emulsion polymerization process, most of them use sodium formaldehyde sulfoxylate as a reducing agent, which brings the risk of formaldehyde release

Method used

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  • Single-component water-based adhesive for evaporative cooling wet curtain and preparation method thereof
  • Single-component water-based adhesive for evaporative cooling wet curtain and preparation method thereof
  • Single-component water-based adhesive for evaporative cooling wet curtain and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 synthetic method:

[0035] According to the formula composition and consumption of the embodiment 1 listed in table 2, the single-component water-based adhesive for evaporative cooling wet curtain is synthesized as follows:

[0036] (1) In formula No. 1, deionized water, AMPS, sodium bicarbonate and ammonium persulfate are stirred and mixed evenly to form the bottom liquid, and then added to the polymerization reactor;

[0037] Embodiment 1 raw material formula is shown in Table 2:

[0038] Table 2. The evaporative cooling wet curtain of embodiment 1 uses single-component water-based adhesive raw material formula

[0039]

[0040] (2) Add deionized water, ammonium persulfate and SR in the formula number 2 to the first pre-emulsification tank, stir slowly and disperse evenly, then add AA and MMA, stir quickly and disperse evenly to form a stable core layer pre-emulsion; In formula number 3, deionized water, ammonium persulfate and SR were added to the s...

Embodiment 2

[0045] Embodiment 2 synthetic method:

[0046] According to the formula composition and consumption of Example 2 listed in Table 3, the single-component water-based adhesive for evaporative cooling wet curtains is synthesized as follows:

[0047] (1) In formula No. 1, deionized water, AMPS, sodium bicarbonate and ammonium persulfate are stirred and mixed evenly to form the bottom liquid, and then added to the polymerization reactor;

[0048] (2) Add deionized water, ammonium persulfate and SR in the formula No. 2 to the first pre-emulsification tank and stir slowly to disperse evenly, then add MAA and MMA, stir quickly and disperse evenly to form a stable core layer pre-emulsion; In formula number 3, deionized water, ammonium persulfate and SR were added to the second pre-emulsification tank and stirred slowly to disperse evenly, then MMA, BA and DVB were added, stirred quickly and dispersed evenly to form a stable transition layer pre-emulsion; In formula number 4, add deion...

Embodiment 3

[0056] Embodiment 3 raw material formula is shown in Table 4:

[0057] Table 4. The evaporative cooling wet curtain of embodiment 3 is used single-component water-based adhesive raw material formula

[0058]

[0059] Embodiment 3 synthetic method:

[0060] According to the formula composition and consumption of the embodiment 3 listed in table 4, synthesize the single-component water-based adhesive for the evaporative cooling wet curtain as follows:

[0061] (1) In formula No. 1, deionized water, AMPS, sodium bicarbonate and ammonium persulfate are stirred and mixed evenly to form the bottom liquid, and then added to the polymerization reactor;

[0062] (2) Add deionized water, ammonium persulfate and SR in the formula number 2 to the first pre-emulsification tank, stir slowly and disperse evenly, then add AA and MMA, stir quickly and disperse evenly to form a stable core layer pre-emulsion; Add deionized water, ammonium persulfate and SR into the second pre-emulsificatio...

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Abstract

The invention discloses a single-component water-based adhesive for an evaporative cooling wet curtain and a preparation method thereof. The method comprises the following steps of: firstly preparing kettle bottom liquid and adding into a polymerization reaction kettle; then respectively preparing nuclear layer pre-emulsion, transition layer pre-emulsion and shell layer pre-emulsion; removing possibly-caused free formaldehyde through carrying out nuclear layer-transition layer-shell layer gradient emulsion polymerization, by adopting an environmentally-friendly and highly-efficient reactive emulsifier and through replacing hydroxymethyl acrylamide with a novel self-crosslinking monomer and replacing sodium formaldehyde sulphoxylate with a macromolecule polymerization type reducing agent; and introducing carbamido or nitrogen heterocycle into an acrylate structure to provide a higher intermolecular hydrogen bond and an intermolecular acting force and improve the wet adhesive force and the scrub resistance of an adhesive layer. The invention has the beneficial effects that the adhesive force and the water resistance of the adhesive layer are ensured through ion crosslinking and in cooperation with diacetone acrylamide / adipic dihydrazide crosslinking; and by adopting an adjusting agent with the super-strong defoaming and wetting functions, the adhesive is ensured to satisfy higher coating rate in the gluing process and not to generate tiny bubble residues.

Description

technical field [0001] The invention relates to water-based adhesive technology, in particular to a single-component water-based adhesive for evaporative cooling wet curtains and a preparation method thereof. The adhesive is applied to the forming and bonding of wet curtains of environmentally friendly water-cooled air conditioners. Background technique [0002] Environmentally friendly water-cooled air conditioners absorb heat according to water evaporation, and the evaporation area affects the natural physical phenomenon of evaporation efficiency. The fan sends air to the room to generate negative pressure inside the machine. After the outdoor air flows through the water-soaked wet curtain, the air fully contacts with water and absorbs it The sensible heat in the air achieves the purpose of cooling. The important part of the environmentally friendly water-cooled air conditioner is the evaporation core, that is, the wet curtain, which is made of natural multi-layer corrugat...

Claims

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Application Information

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IPC IPC(8): C09J133/08C09J133/12C09J11/06C09J11/08C08F220/14C08F220/18C08F220/34C08F222/38C08F220/56C08F220/58
Inventor 胡剑青赖淦荷郑牧湘
Owner DONGGUAN STAR COSM POLYMER
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