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Acrylic polyurethane copolymer emulsion, its preparation method and use

A technology of acrylic polyurethane and acrylate, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as high cost, rare raw materials, and complicated phase transfer process, and achieve excellent film-forming properties and excellent water resistance.

Inactive Publication Date: 2003-08-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process can significantly increase the grafting rate of acrylate monomers and PU, but the phase transfer process is complicated, the process conditions are difficult to control, and a large amount of solvent needs to be used and recovered, which is costly
U.S. Patent USP6462127 (2002, 10.8) prepares oxidatively dry acrylic polyurethane composite emulsion at room temperature by drying oil polyol, the preparation process takes a long time, raw materials are rare, and the conversion rate of acrylic acid monomer is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The acrylic polyurethane copolymer emulsion was cross-linked and modified with epoxy resin, and its formulation components are listed in Table 2.

[0045] Table 2 Acrylic polyurethane graft polymer emulsion

[0046] Component mass 1 Polyether polyol (N210) 252 Epoxy resin (E20) 133 Toluene diisocyanate (TDI) 404 Dimethylol propionic acid (DMPA) 7.55 Diethylene glycol (DEG) 66 Trimethylol propionic acid ( TMP) 2.07 Triethylamine (TEA) 4.08 Ethylenediamine (EDA) 0.89 Methyl methacrylate (MMA) 3510 Initiator 0.0511 Deionized water 150.0

[0047] Under the protection of dry nitrogen, add the dehydrated polyether diol N210, epoxy resin and TDI into a 1000ml four-necked flask equipped with a thermometer, a stirring device and a reflux condenser, and react at 70°C-80°C for 2 hours, Then add diethylene glycol and react at 70° C. to 80° C. for 1 hour, and use n-butylamine titration method to judge the reaction end point. After reaching the end point, add NMP solu...

Embodiment 2

[0049] Using the epoxy resin crosslinking modified acrylate polyurethane microemulsion prepared in Example 1, the wood coating formulation was prepared as shown in Table 3.

[0050] serial number

[0051] The preparation method is as follows: firstly add raw materials No. 2-6 into the stirring tank, disperse with a high-speed disperser for 10-30 minutes, then slowly add the acrylic acid microemulsion into the stirring tank, stir at a medium speed for 30-60 minutes, adjust with ammonia water The PH value of the paint, when the PH value is qualified, it is filtered, discharged and packaged. Properties of the prepared wood coating: Appearance: Milky white slightly transparent liquid without mechanical impurities; PH=7-9; solid content 35-40%, viscosity 30-200cps. Wood coating film performance: coating film pencil hardness: H; water resistance: no obvious change after immersion in water for 48 hours; adhesion: level 1; impact resistance strength: 50kg.cm; flexibility: le...

Embodiment 3

[0053] The acrylic polyurethane graft copolymer emulsion was prepared by reacting polyester polyol and aliphatic diisocyanate, and the raw materials used are listed in Table 4.

[0054] Table 4 Self-crosslinking modified water-based polyurethane emulsion

[0055] Component mass 1 Polyester polyol (T1136) 37.22 Epoxy resin E51 6.33 Isophorone diisocyanate (IPDI) 37.84 Butanediol (BDO) 6.05 Dimethylol propionic acid (DMPA) 7.06 N-methylpyrrolidone 10.07 Tri Ethylamine (TEA) 4.08 Ethylenediamine (EDA) 0.89 Styrene (ST) 5510 Initiator 0.0811 Deionized water 170.0

[0056] Under the protection of dry nitrogen, the dehydrated polyester diol, epoxy resin and IPDI were added to a 1000ml four-necked flask equipped with a thermometer, a stirring device and a reflux condenser, and reacted for 2 hours at 70°C-90°C, and then Add butanediol and react at 70°C-80°C for 1 hour, and use n-butylamine titration method to judge the reaction end point. After reaching the end point...

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Abstract

The invention refers to a kind of acrylic acid polyurethane copolymer latex, the making method and the application to carpentry dope. It adopts technique of seed-latex polymerization, selects end-sealing agent, and adopts self cross-linking acrylate monomer to make the excellent-capability epoxy cross-linked denaturing copolymer latex. The diameter of particles of the latex is small and distributes evenly. The painting film made of it has excelelnt water-resistant, solvent resistance, high rigidity and better appearance.

Description

technical field [0001] The present invention relates to an acrylic polyurethane copolymer emulsion. [0002] The invention also relates to a preparation method of the acrylic polyurethane copolymer emulsion. [0003] The invention also relates to the application of the acrylic polyurethane copolymer emulsion in preparing wood coatings. technical background [0004] With the enhancement of people's awareness of environmental protection and energy, especially the strict restrictions on the content of volatile organic compounds (VOC) in coating systems in various countries' environmental protection laws, the development of low-pollution coatings represented by water-based coatings has been promoted. Polyurethane (PU) emulsions and polyacrylate (PA) emulsions have been widely used as base materials for coatings, inks, and adhesives, and their performance is usually difficult to match that of the corresponding solvent-based resins because of the introduction of hydrophilic group...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/63C09D175/14
Inventor 瞿金清沈慧芳张心亚陈焕钦
Owner SOUTH CHINA UNIV OF TECH
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