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Water-based adhesive and preparation method thereof

An adhesive, water-based technology, applied in the field of water-based adhesive and its preparation, can solve the problems of sticking to the core of the packaging box, a large number of air bubbles, reducing production efficiency, etc., and achieve high bonding strength, high temperature resistance, strong low temperature resistance, etc. performance, the effect of ensuring stability

Active Publication Date: 2020-05-12
DONGGUAN STAR COSM POLYMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the water-based spray adhesives on the market are prone to flying glue, splashing glue, clogged nozzles and a large number of air bubbles when spraying at this speed, reducing production efficiency and causing product defects such as sticky cores and sticky flowers on the packaging box

Method used

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

Examples

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preparation example Construction

[0044] A preparation method of water-based adhesive, comprising the steps of:

[0045]Put 45.0-50.0 parts by weight of acrylate emulsion and 45.0-50.0 parts by weight of polyurethane dispersion into the reactor in sequence, and stir evenly. Preferably, the stirring speed is selected to be 38 to 42 rpm, at which the solution will not splash out of the reactor.

[0046] Keep stirring, slowly put 3.0-6.0 parts by weight of plasticizer into the reactor, and stir evenly after the plasticizer is finished. Preferably, the stirring speed is 56-63 rpm, and the solution will not splash while stirring evenly.

[0047] Adjust the stirring speed to 27-33 rpm, slowly put 0.3-0.6 parts by weight of the antifoaming agent into the reactor, and stir until no foaming occurs. The stirring speed is chosen to be 27-33 rpm, which can slowly dissolve the defoamer into the glue and achieve a good defoaming effect.

[0048] Maintain a stirring speed of 27-33 rev / min, and slowly put 0.1-0.4 parts by ...

Embodiment 1

[0059] The aqueous adhesive of the present embodiment comprises the composition of following quality:

[0060]

[0061] The defoamer is composed of mineral oil defoamer and molecular defoamer, and the thickener is composed of high thixotropic thickener and Newtonian fluid thickener.

[0062] Water selects deionized water for use.

[0063] The preparation method of above-mentioned water-based adhesive comprises the steps:

[0064] Put 46.0 kg of acrylate emulsion (solid content: 55±1wt%, Tg: -45°C to -50°C) and 48.0 kg of polycarbonate polyurethane dispersion (solid content: 50±1wt%) into the reactor in turn, and stir Turn on the speed to 40 rpm and stir for 15 minutes.

[0065] Keep stirring, slowly add 4.0 kilograms of plasticizer Hexamoll DINCH, after throwing, then open the stirring speed to 60 rev / min, keep stirring for 15 minutes.

[0066] Adjust the stirring speed to 30 rpm, slowly add 0.3 kg of mineral oil defoamer Foamaster 8034A and 0.2 kg of molecular grade def...

Embodiment 2

[0072] The aqueous adhesive of the present embodiment comprises the composition of following quality:

[0073]

[0074] The defoamer is composed of mineral oil defoamer and molecular defoamer, and the thickener is composed of high thixotropic thickener and Newtonian fluid thickener.

[0075] Water selects deionized water for use.

[0076] The preparation method of above-mentioned water-based adhesive comprises the steps:

[0077] Put 45.0 kg of acrylate emulsion (solid content: 57±1wt%, Tg: -45°C to -50°C) and 50.0 kg of polycarbonate polyurethane dispersion (solid content: 46±1wt%) into the reactor in turn, and stir Turn on the speed to 40 rpm and stir for 15 minutes.

[0078] Keep stirring, slowly add 6.0 kg of plasticizer K-FLEX 850S, after the injection is finished, turn on the stirring speed to 60 rpm, and keep stirring for 15 minutes.

[0079] Adjust the stirring speed to 30 rpm, slowly add 0.3 kg of mineral oil defoamer BYK-035 and 0.1 kg of molecular grade defoam...

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Abstract

The invention relates to an aqueous adhesive and a preparation method thereof. The aqueous adhesive comprises the following components by weight: 45.0-50.0 parts of acrylate emulsion; 45.0-50.0 partsof a polyurethane dispersion; 3.0 to 6.0 parts of a plasticizer; 0.3 to 0.6 part of an antifoaming agent; 0.1 to 0.4 part of a preservative; 0.6 to 1.3 parts of a thickener and a proper amount of water. The antifoaming agent comprises a mineral oil type antifoaming agent and a molecular grade antifoaming agent, and the thickener comprises a high thixotropic thickener and a Newtonian fluid thickener. The aqueous adhesive meets the requirements of high-speed spray application, and can be sprayed at a material conveying speed of nearly 300 m / min, does not cause flying gel, splashing, clogging nozzles and a large number of bubbles, and is suitable for sealing and fitting of various materials and cardboards. The preparation method of the aqueous adhesive is based on the material characteristicsto formulate the degree of reaction of each step, is simple and easy, has low technical requirements for workers, and is suitable for large-scale promotion.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to water-based adhesives and a preparation method thereof. Background technique [0002] At present, the printing and packaging industry has begun to enter the stage of industrial development. The post-press process has also begun to work hard to find a process that matches well with printing. Therefore, the traditional manual or small mechanical process will be phased out due to the shortcomings of high labor costs and complicated operating procedures. The new post-press equipment will be semi-automatic or fully automatic. Automatic equipment as the starting point, seeking new profit points for development. [0003] In the post-press sealing process of cosmetic boxes, toothpaste boxes, food packaging boxes and other packaging fields, the current development trend is to use automatic glue spraying, and the required material delivery speed is close to 300 m / min. Most of the water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/04C09J175/04C09J11/08C09J11/00
CPCC09J11/00C09J11/08C09J133/04C09J175/04C08L33/04C08L75/04
Inventor 胡剑青赖淦荷胡浪浪陈锦彬
Owner DONGGUAN STAR COSM POLYMER