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Polyurethane vacuum plastic uptake adhesive and preparation method thereof

A vacuum suction and polyurethane technology, applied in the field of plastic suction, can solve the problems of easy layering of emulsion, precipitation and agglomeration, etc., and achieve the effect of narrow particle size distribution range, stable emulsion system and small particle size

Inactive Publication Date: 2020-07-03
骏能化工(龙南)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention provides a polyurethane vacuum-absorbing plastic and its preparation method, which uses acrylic acid to chemically modify the water-based polyurethane emulsion, and uses ultrasonic mixing before the two are swollen, which can solve the problems in the prior art. The problem of easy stratification and precipitation and agglomeration of the emulsion in the vacuum suction plastic

Method used

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  • Polyurethane vacuum plastic uptake adhesive and preparation method thereof
  • Polyurethane vacuum plastic uptake adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The acrylic-modified water-based polyurethane emulsion provided in this example is prepared by the following method. 200 g of polyether diol (molecular weight 2000) after pre-dehydration treatment is placed in a four-necked flask, 50 g of acetone is added, stirring is started, and the temperature is raised to At 80°C, slowly add 15g of hexamethylene diisocyanate, keep stirring for 2 hours, then add 20g of dimethylol propionic acid and 0.4g of dibutyltin dilaurate, heat up to about 85°C and react for 6 hours, the reaction process Add acetone to reduce the viscosity of the mixture as needed, add triethylamine to the mixture to neutralize it at room temperature, disperse it in 500g water for emulsification and dispersion, and remove the acetone at 60°C under a vacuum pressure of 0.08kPa to obtain an aqueous polyurethane dispersion.

[0021] Add 200g of methyl methacrylate to the obtained water-based polyurethane emulsion, and treat it with ultrasonic power of 250W for 45min...

Embodiment 2

[0023] The acrylic-modified water-based polyurethane emulsion provided in this example is prepared by the following method. 150g of polyether diol (molecular weight: 2000) after pre-dehydration treatment is placed in a four-necked flask, 45g of acetone is added, stirring is started, and the temperature is raised to 85°C, slowly add 11g of hexamethylene diisocyanate, keep stirring and react for 1.5h, add 17g of dimethylol propionic acid and 0.3g of dibutyltin dilaurate, heat up to about 90°C and react for 6h, the reaction During the process, acetone was added as needed to reduce the viscosity of the mixture. The mixture was cooled to room temperature and triethylamine was added for neutralization, and dispersed in 400 g of water for emulsification and dispersion. The acetone was removed at 60° C. under a vacuum pressure of 0.08 kPa to obtain an aqueous polyurethane dispersion.

[0024] Add 150g of methyl methacrylate to the obtained water-based polyurethane emulsion, and treat i...

Embodiment 3

[0026] The acrylic-modified water-based polyurethane emulsion provided in this example is prepared by the following method. 250 g of polyether diol (molecular weight 2000) after pre-dehydration treatment is placed in a four-necked flask, 60 g of acetone is added, stirring is started, and the temperature is raised to Slowly add 20g of hexamethylene diisocyanate at 75°C, heat and stir for 2.5 hours, then add 25g of dimethylol propionic acid and 0.5g of dibutyltin dilaurate, heat up to about 95°C and react for 5 hours. During the process, acetone was added as needed to reduce the viscosity of the mixture. The mixture was cooled to room temperature and triethylamine was added for neutralization, and dispersed in 600 g of water for emulsification and dispersion. The acetone was removed at 60° C. under a vacuum pressure of 0.08 kPa to obtain an aqueous polyurethane dispersion.

[0027] Add 250 g of methyl methacrylate to the obtained water-based polyurethane emulsion, and treat it at...

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Abstract

The invention belongs to the technical field of plastic uptake adhesives, and specifically relates to a polyurethane vacuum plastic uptake adhesive and a preparation method thereof. The polyurethane vacuum plastic uptake adhesive provided by the ivnention comprises the following components in parts by weight: 90-95 parts of an acrylic acid modified waterborne polyurethane emulsion, 1-3 parts of awetting leveling agent, 3-5 parts of a tackifier and 0.1-0.3 part of an antifoaming agent, wherein the average particle size of the acrylic acid modified waterborne polyurethane emulsion is 110-120 nm; the pH value of the acrylic acid modified waterborne polyurethane emulsion is 5.0-6.0; the obtained acrylic acid modified waterborne polyurethane emulsion can be conveniently used for preparing thevacuum plastic uptake adhesive; and the emulsion is not prone to layering, precipitating and caking.

Description

technical field [0001] The invention belongs to the technical field of plastic absorption, and in particular relates to a polyurethane vacuum plastic absorption and a preparation method thereof. Background technique [0002] Vacuum plastics usually use polyurethane emulsion as the main component, which has good film-forming properties, and has excellent heat resistance and water resistance after cross-linking. In order to improve the performance of plastic absorbers, polyurethane emulsion and acrylic emulsion are usually compounded. The plastic absorber polyurethane emulsion and acrylic emulsion prepared by conventional methods mainly rely on the hydrogen bond effect formed by the polar hydrogen atoms in polyurethane and the oxygen atoms in acrylic acid. To improve the miscibility of the two, but the hydrogen bond is weak, therefore, the physical blending, the miscibility between the two is relatively poor, and it needs to be adjusted to a specific pH value in the preparatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/08
CPCC09J175/08C09J11/08C08L33/12
Inventor 王兰柱王子文高丙义
Owner 骏能化工(龙南)有限公司
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