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Organosilicon modified aqueous polyurethane emulsion

A water-based polyurethane and silicone technology, applied in polyurea/polyurethane adhesives, adhesive types, adhesives, etc., to achieve low cohesive energy density, improve heat resistance, and improve adhesion

Inactive Publication Date: 2013-04-24
QINGDAO WINCHANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high temperature resistance and heat aging performance of polyurethane adhesives are not good enough, which limits their application range greatly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The prepolymer was prepared from diphenylmethane diisocyanate (MDI), polyether diol (DL-1000), 1,4-butanediol (BDO) and dimethylol propionic acid (DMPA). The molar ratio of MDI to DL-1000, DMPA, and BDO is 1.2:1, BDO accounts for 2% of the mass of the prepolymer, and DMPA accounts for 4% of the mass of the prepolymer. Aminopropyltriethoxysilane (KH-550) was added to modify the end-NCO of the prepolymer, and reacted for 50 minutes. The ratio of the amount of substance of aminopropyltriethoxysilane (KH-550) to the amount of substance of excess-NCO was 0.35. Cool down to 40°C, add triethylamine for neutralization reaction to generate salt, and react for 3 minutes. The amount of substance of triethylamine is the same as that of DMPA. Water was added for emulsification for 60 minutes, and the amount of water used was twice the total mass of the prepolymer to obtain a silicone-modified water-based polyurethane emulsion.

Embodiment 2

[0016] The prepolymer was prepared from diphenylmethane diisocyanate (MDI), polyether diol (DL-1000), 1,4-butanediol (BDO) and dimethylol propionic acid (DMPA). The molar ratio of MDI to DL-1000, DMPA, and BDO is 1.3:1, BDO accounts for 3% of the mass of the prepolymer, and DMPA accounts for 5% of the mass of the prepolymer. Aminopropyltriethoxysilane (KH-550) was added to modify the end-NCO of the prepolymer, and reacted for 50 minutes. The ratio of the amount of substance of aminopropyltriethoxysilane (KH-550) to the amount of substance of excess-NCO was 0.35. Cool down to 40°C, add triethylamine for neutralization reaction to generate salt, and react for 4 minutes. The amount of substance of triethylamine is the same as that of DMPA. Water was added for emulsification for 60 minutes, and the amount of water used was twice the total mass of the prepolymer to obtain a silicone-modified water-based polyurethane emulsion.

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PUM

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Abstract

An organosilicon modified aqueous polyurethane emulsion is prepared by using MDI, DL-1000, BDO and DMPA as raw materials to prepared pre-polymers, adding KH-550 to carry out end-capped modification for an end -NCO of the pre-polymers, adding triethylamine for a neutralization reaction to generate salts, and adding a proper amount of deionized water to obtain the organosilicon modified aqueous polyurethane emulsion. The aqueous polyurethane obtained by the invention is relatively good in cold resistance, water resistance and adhesion after being into a film.

Description

technical field [0001] The invention relates to an organosilicon-modified water-based polyurethane emulsion, which belongs to the field of chemical industry. technical background [0002] Polyurethane adhesive contains isocyanate group and urethane group, which has strong activity and polarity, so it has good bonding performance to various materials such as rubber, metal, fabric, leather, paper, plastic; at the same time, Hydrogen bonds can be formed between polyurethane macromolecular chains or with adherends, so it has stronger cohesion, higher bonding strength, better wear resistance and solvent resistance. However, the high temperature resistance and heat aging performance of polyurethane adhesives are not good, which greatly limits their application range. [0003] Polysiloxane, which is composed of silicon-oxygen bonds as the skeleton, is the most deeply researched and most widely used class of compounds in organic silicon. Its unique silicon-oxygen bond structure m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/38C08G18/12C09J175/08
Inventor 苏建丽
Owner QINGDAO WINCHANCE TECH
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