Water-based heat activated adhesive and preparation method thereof

A heat-activated, adhesive technology, applied in the direction of adhesives, adhesive types, rosin adhesives, etc., can solve the problems of unfavorable rapid construction, unfavorable high-speed automatic production, high cost, etc., to protect life, health and safety, and effectively Conducive to automatic production and less environmental pollution

Active Publication Date: 2014-03-19
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, solvent-based adhesives contain volatile organic solvents such as benzene and toluene, and the toxicity and environmental pollution problems brought about during use affect their output.
Water-based adhesives are composed of 50% water, non-polluting and cheap, but they have the problems of high emulsion viscosity, which is not conducive to rapid construction, low bonding strength, narrow application range, and easy sticking back at room temperature, which is not conducive to high-speed automation Production, and need to stick release film, the cost is high
Hot-melt adhesives are coated in a molten state, and then cooled to a solid state to complete the adhesion, but its bonding strength is low, and it is mainly used in occasions such as cloth that do not require high bonding strength.

Method used

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  • Water-based heat activated adhesive and preparation method thereof
  • Water-based heat activated adhesive and preparation method thereof
  • Water-based heat activated adhesive and preparation method thereof

Examples

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preparation example Construction

[0017] like figure 1 Shown, the present invention discloses a kind of preparation method of water-based heat-activated adhesive, it comprises the following steps,

[0018] S1. Put 5-20 parts by weight of ethylene-vinyl acetate emulsion into the first reaction kettle, and add ammonia water dropwise under stirring condition to adjust the pH value of the ethylene-vinyl acetate emulsion. Wherein the pH value ranges from 6 to 7, and the stirring time is 10 minutes. The above-mentioned ethylene-vinyl acetate emulsion is preferably 8 to 15 parts.

[0019] S2. Put 15-35 parts by weight of water-based polyurethane emulsion, 30-50 parts of acrylic emulsion, and 5-15 parts of another acrylic emulsion into the second reaction kettle and stir. Wherein, the stirring time in step S2 is 30min, and the rotating speed is 300RPM. The above-mentioned aqueous polyurethane emulsion is 22.5 parts; the acrylic emulsion is preferably 37.5 parts; another part of acrylic emulsion is preferably 10 par...

Embodiment 1

[0023] Add 5 g of ethylene-vinyl acetate emulsion into the first reaction kettle, add ammonia water dropwise under stirring condition, control the pH to 6, stir for 10 minutes, seal and store for later use. Add 15g water-based polyurethane emulsion, 50g acrylic emulsion one, and 10g acrylic emulsion two in the second reaction kettle, make the three stir and blend in the second reaction kettle, the rotating speed when stirring in the second reaction kettle is 300RPM, the stirring time for 30min. Then, add the emulsion system in the first reaction kettle to the second reaction kettle, then add 15g of terpene phenolic emulsion, 0.1g of wetting and leveling agent, and blend at a rotation speed of 300RPM and a stirring time of 300min , after fully stirring, the material is filtered and discharged to obtain the final product.

Embodiment 2

[0025] Add 10 g of ethylene-vinyl acetate emulsion into the first reaction kettle, add ammonia water dropwise under stirring, control the pH to 6, stir for 10 minutes, and seal it for future use. Add 35g water-based polyurethane emulsion, 30g acrylic emulsion one and 5g acrylic emulsion two in the second reaction kettle, make the three stir and blend in the second reaction kettle, the rotating speed when stirring in the second reaction kettle is 300RPM, the stirring time for 30min. Then, add the emulsion system in the first reaction kettle to the second reaction kettle, then add 15g of terpene phenolic emulsion, 0.1g of wetting and leveling agent, and blend at a rotation speed of 300RPM and a stirring time of 300min , after fully stirring, the material is filtered and discharged to obtain the final product.

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Abstract

The invention discloses a water-based heat activated adhesive and a preparation method thereof, wherein the preparation method comprises the following steps: S1, putting 5-20 parts of ethylene-vinyl acetate emulsion into a first reaction kettle, and adjusting the pH value; S2, feeding 15-35 parts of waterborne polyurethane emulsion, 30-50 parts of acrylic emulsion and another 5-15 parts of acrylic emulsion to a second reaction kettle to agitate; S3, blending emulsion in the first reaction kettle and the second reaction kettle, adding 0-30 parts of water-based terpene phenolic resin emulsion or water-based resin emulsion, and 0.1-0.5 part of defoamer and leveling flatting agent; and filtering to obtain the final product after fully agitating. The water-based heat activated adhesive prepared by the preparation method of the water-based heat activated adhesive disclosed by the invention is uniform and stable, free of bad phenomena such as layering, demulsifying and the like, good in waterproof property, high in bonding strength at a high temperature, not easy to stick back at a low temperature, and beneficial to automatic production. Meanwhile, the pollution on the environment is small, and the life health and the safety of a constructor are effectively protected.

Description

technical field [0001] The invention relates to the field of adhesive preparation, in particular to a water-based heat-activated adhesive and a preparation method thereof. Background technique [0002] At present, the commonly used adhesives are mainly solvent-based, water-based and hot-melt. Among them, solvent-based adhesives contain volatile organic solvents such as benzene and toluene, and the toxicity and environmental pollution problems brought about during use will affect their output. Water-based adhesives are composed of 50% water, non-polluting and cheap, but they have the problems of high emulsion viscosity, which is not conducive to rapid construction, low bonding strength, narrow application range, and easy sticking back at room temperature, which is not conducive to high-speed automation Production, and need to stick release film, the cost is high. Hot-melt adhesives are coated in a molten state and bonded when cooled to a solid state, but their bonding stren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/00C09J175/04C09J123/08C09J161/14C09J193/04
Inventor 尹万安丁清华
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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