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Acrylate grafted aqueous polyurethane emulsion and preparation method thereof

A water-based polyurethane and acrylate technology, applied in the direction of graft polymer adhesives, adhesive types, coatings, etc., can solve problems such as poor water resistance, poor wettability of non-polar substrates, and low initial tack. Achieve a wide range of applications, good dispersion effect, and good stability

Active Publication Date: 2012-07-11
顶立新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-based polyurethane emulsion has the characteristics of safety, easy storage, convenient use, and low cost. At the same time, it inherits many excellent properties of solvent-based polyurethane, such as adjustable hardness, low temperature resistance, good wear resistance and strong adhesion. But there are slow film forming speed, poor wettability to non-polar substrates, low initial viscosity, poor water resistance, unsatisfactory heat resistance, etc.
Acrylic products have the advantages of high mechanical strength, aging resistance, abrasion resistance, solvent resistance and water resistance, but have the disadvantage of hot stickiness and cold brittleness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Put 100 parts of polyether polyol and 5.5 parts of dimethylol propionic acid into vacuum dehydration at 95°C, put them into a dry four-necked flask with a thermometer, raise the temperature to 85°C, and add 30 parts of isophorone Prepolymerize diisocyanate and introduce hydrophilic monomers. After 3 hours of reaction, add 2 parts of ethylenediamine and 5 parts of hydroxyethyl acrylate to perform chain extension reaction and introduce functional monomers. React for 1 hour and cool down to 50°C , add 20 parts of butyl acrylate and 10 parts of methyl methacrylate to reduce the viscosity of the system, continue to cool down to 30°C, then add 3 parts of triethylamine to neutralize, stir for 8 minutes, and add 350 parts of Emulsify with deionized water and disperse for 25 minutes to obtain an emulsion. Continue to dropwise add 100 parts of butyl acrylate, 50 parts of methyl methacrylate, and 10 parts of azobisisobutyronitrile. The uniform dropwise addition is completed within ...

Embodiment 2

[0034] 100 parts of polyether polyol and 7 parts of dimethylol propionic acid were vacuum dehydrated at 90°C, put into a dry four-necked flask with a thermometer, raised the temperature to 85°C, and added 32 parts of isophorone Prepolymerize diisocyanate and introduce hydrophilic monomers. After 3 hours of reaction, add 2.5 parts of ethylenediamine and 15 parts of hydroxyethyl acrylate to carry out chain extension reaction and introduce functional monomers. React for 1 hour and cool down to 50°C , add 21 parts of butyl acrylate and 13 parts of methyl methacrylate to reduce the viscosity of the system, continue to cool down to 32°C, then add 4 parts of triethylamine to neutralize, stir for 9 minutes, and add 380 parts of Emulsify with deionized water, disperse for 28 minutes to obtain an emulsion, continue to drop 80 parts of butyl acrylate, 50 parts of methyl methacrylate, and 15 parts of azobisisobutyronitrile, and finish adding evenly within 3 hours, then raise the temperatur...

Embodiment 3

[0037] Put 100 parts of polyether polyol and 10 parts of dimethylol propionic acid into vacuum dehydration at 100°C, put them into a dry four-neck flask with a thermometer, raise the temperature to 85°C, and add 35 parts of isophorone Prepolymerize diisocyanate and introduce hydrophilic monomers. After 3 hours of reaction, add 3 parts of ethylenediamine and 40 parts of hydroxyethyl acrylate to carry out chain extension reaction and introduce functional monomers. React for 1 hour and cool down to 50°C , add 25 parts of butyl acrylate and 15 parts of methyl methacrylate to reduce the viscosity of the system, continue to cool down to 35°C, then add 5 parts of triethylamine to neutralize, stir for 9 minutes, and add 400 parts of Emulsify with deionized water and disperse for 25 minutes to obtain an emulsion. Continue to dropwise add 98 parts of butyl acrylate, 60 parts of methyl methacrylate, and 20 parts of azobisisobutyronitrile. The uniform dropwise addition is completed within ...

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PUM

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Abstract

The invention discloses acrylate grafted aqueous polyurethane emulsion and a preparation method thereof. The emulsion is characterized is prepared from polyether polyol, dimethylol propionic acid, isophorone diisocyanate, ethylenediamine, hydroxyethyl acrylate and the like. The preparation method comprises the following steps: carrying out prepolymerization on polyether polyol, dimethylol propionic acid and isophorone diisocyanate so as to introduce a hydrophilic monomer; adding ethylenediamine and hydroxyethyl acrylate to carry out chain extension so as to introduce a functional monomer; adding an acrylate mixed monomer so as to reduce system viscosity; adding triethylamine for neutralization; adding deionized water for emulsification and dispersion under the condition of high-speed shearing to obtain emulsion; then dropwise adding the acrylate mixed monomer and an initiator, raising the temperature and carrying out reaction; and cooling to obtain the PUA (polyurethane-acrylate) emulsion. The emulsion prepared by the method has small grain size and excellent performances such as mechanical performance, is narrowly distributed and can be widely applied to industry fields such as leather finish, coatings, adhesives and fabric coatings.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a water-based polyurethane emulsion grafted with acrylate and a preparation method thereof. Background technique [0002] In recent years, with the increasingly stringent environmental protection regulations and the rising cost of petroleum products, people have paid more and more attention to water-based polyurethane, which uses water instead of organic solvents as the dispersion medium. Water-based polyurethane emulsion has the characteristics of safety, easy storage, convenient use, and low cost. At the same time, it inherits many excellent properties of solvent-based polyurethane, such as adjustable hardness, low temperature resistance, good wear resistance and strong adhesion. However, there are slow film forming speed, poor wettability to non-polar substrates, low initial viscosity, poor water resistance, and unsatisfactory heat resistance. Acrylic pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F283/00C08F220/18C08F220/14C08F4/04C08G18/67C08G18/66C08G18/48C08G18/34C08G18/12C09D151/08C09J151/08D06M15/21
Inventor 陆林森
Owner 顶立新材料科技股份有限公司
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